CN114453664A - Method for improving shearing precision of multi-length flying shear of bar - Google Patents
Method for improving shearing precision of multi-length flying shear of bar Download PDFInfo
- Publication number
- CN114453664A CN114453664A CN202210122384.9A CN202210122384A CN114453664A CN 114453664 A CN114453664 A CN 114453664A CN 202210122384 A CN202210122384 A CN 202210122384A CN 114453664 A CN114453664 A CN 114453664A
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- shearing
- bar
- precision
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- 238000010008 shearing Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 241000237858 Gastropoda Species 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
- B23D33/006—Accessories for shearing machines or shearing devices for obtaining pieces of a predetermined length, e.g. control arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D25/00—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut
- B23D25/02—Flying shearing machines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a method for improving the shearing precision of a double-length flying shear of a bar, which comprises the following steps: the shearing length is calculated in a mode that the shearing length is pulse equivalent pulse number, wherein the pulse equivalent is calculated by recording the pulse number of the head of a rolled piece in the process of moving the head of the rolled piece from HMD-1 to HMD-2 and dividing the pulse number by the distance between the HMD-1 and the HMD-2, and the HMD-2 is installed at the position of 20.1m after the reduction; HMD-3 and HMD-4 are respectively arranged at HMD-1 and HMD-2, wherein HMD-3 and HMD-1 are connected in parallel, HMD-4 and HMD-2 are connected in parallel, and a logical OR relationship is adopted; the trigger position of the hot metal detection signal is optimized, and the calculation precision is improved; the signal trigger mode is changed, single signal trigger is changed into double signal trigger, the stability is improved, and faults are reduced; optimizing control logic, revising multiple length setting parameters and improving control precision.
Description
Technical Field
The invention belongs to the technical field of bar steel rolling production lines, and particularly relates to a method for improving the shearing precision of a multi-length flying shear of a bar.
Background
The flying shear is mainly used for a bar steel rolling production line to shear bars. After the outlet of a finished product rack of a bar continuous rolling line and before a workpiece enters a cooling bed, the length of the outlet of the continuous rolling line is hundreds of meters to thousands of meters according to the length of the cooling bed and the control performance of sliding brake of the workpiece, the length of the outlet of the continuous rolling line is integral multiple of the supply length, the fixed length flying shear is also called a multiple length flying shear, the workpiece is cut off during fast forward, in order to reduce the rest stub bar when the workpiece is cut again in the fixed length cold shear after the workpiece is placed in the cooling bed, the length of the general finished product is 6m, 9m or 12m, the yield of the whole production line is improved, and the cutting precision of the multiple length flying shear is required to be accurate as much as possible.
The multiple-length flying shear is unstable, the cutting loss is increased, the yield is influenced, and even the machine-upset drilling snail is caused, so the working stability of the multiple-length flying shear is very important.
The cutting loss of the bar line mainly comes from the cutting materials generated at the positions of a 1# cutting head, a 2# cutting tail, a 3# cutting head, a cold shear cutting head and tail and the like, the cutting loss has large influence on the unit consumption of the steel billet, the cutting loss is controlled, and the stability of the unit consumption of the steel billet of a production line is facilitated.
Through field observation, data analysis, the focus loss of cut index mainly is produced by cold shearing tail-cutting, accounts for about 50% of total loss of cut, because the difference of the control accuracy is cut to the multiple length, the multiple length is cut the shear instability, leads to in the same steel billet, and every multiple length differs, and the difference is more than 50cm, can appear multiple length brill snail when serious, phenomenon such as indiscriminate bed, and the difference is big more, and the cold shearing loss of cut is higher. Therefore, the reduction of the cold shearing loss is an important way for reducing the shearing loss cost of the bar line, the shearing precision of the multi-length shear is researched, and the method has great significance for reducing the steel rolling cost.
The shearing length of the double-length shear in the traditional production line is timed by taking a zero-position proximity switch of the double-length shear as a trigger signal, the speed is converted by adopting a pulse signal of an encoder of an end mill, and the speed and the zero-position proximity switch are converted by a program to finally obtain the shearing length of the double-length shear. However, the distance between the tail mill and the double-length shear is long, so that an error exists in calculating the running speed of the steel, the length of the steel sheared by the double-length shear is unstable, and the length is deviated.
Disclosure of Invention
The invention aims to provide a method for improving the shearing precision of a double-length flying shear of a bar.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for improving the shearing precision of a double-length flying shear of a bar comprises the following steps:
1) the shearing length is calculated in a mode that the shearing length is pulse equivalent pulse number, wherein the pulse equivalent is calculated by recording the pulse number of the head of a rolled piece in the process of moving the head of the rolled piece from HMD-1 to HMD-2 and dividing the pulse number by the distance between the HMD-1 and the HMD-2, and the HMD-2 is installed at the position of 20.1m after the reduction;
2) HMD-3 and HMD-4 are respectively arranged at HMD-1 and HMD-2, wherein HMD-3 and HMD-1 are connected in parallel, HMD-4 and HMD-2 are connected in parallel, and a logical OR relationship is adopted.
The invention has the beneficial effects that:
1) the trigger position of the hot metal detection signal is optimized, and the calculation precision is improved;
2) the signal trigger mode is changed, single signal trigger is changed into double signal trigger, the stability is improved, and faults are reduced;
3) optimizing control logic, revising multiple length setting parameters and improving control precision.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a method for improving the shearing precision of a double-length flying shear for bars is characterized in that the double-length of a bar line is measured by a priority method, namely the shearing length is equal to the pulse equivalent × the number of pulses, under the condition that the outlet speed of an end mill is stable, the pulse equivalent is a key factor for determining the stability of the double-length, and the pulse equivalent is calculated by recording the number of pulses of a head of a rolled piece in the process of moving from HMD-1 to HMD-2 and dividing the pulse by the distance between the HMD-1 and the HMD-2. The method can avoid the abrasion of the roller diameter and automatically adapt to the change of the roller diameter. In order to obtain stable pulse equivalent, the thermal detection installation position after shearing is generally far away from the multiple length flying shears as far as possible.
After the device is put into use, a phenomenon of multiple-length drilling snails appears for many times, the analysis shows that a signal of a hot metal detector (hereinafter referred to as hot detection) after shearing is unstable, and through field observation, the hot detection after shearing is installed at the inlet of the apron board, the position has much dust, and the measurement environment is poor. To obtain stable detection data, the HMD-2 hot metal detector was moved to a distance of 20.1 meters after shearing.
In addition, according to the actual use on site, the HMD-1 hot metal detector signal has the flash problem, through research, a hot metal detector HMD-3 and an HMD-4 are added on the basis, the HMD-1 and the HMD-3 are connected in parallel, the HMD-2 and the HMD-4 are connected in parallel, and the logical OR relationship is adopted, so that the stability of the signal is ensured.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (1)
1. A method for improving the shearing precision of a double-length flying shear of a bar is characterized by comprising the following steps:
1) the shearing length is calculated in a mode that the shearing length is pulse equivalent pulse number, wherein the pulse equivalent is calculated by recording the pulse number of the head of a rolled piece in the process of moving the head of the rolled piece from HMD-1 to HMD-2 and dividing the pulse number by the distance between the HMD-1 and the HMD-2, and the HMD-2 is installed at the position of 20.1m after the reduction;
2) HMD-3 and HMD-4 are respectively arranged at HMD-1 and HMD-2, wherein HMD-3 and HMD-1 are connected in parallel, HMD-4 and HMD-2 are connected in parallel, and a logical OR relationship is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210122384.9A CN114453664A (en) | 2022-02-09 | 2022-02-09 | Method for improving shearing precision of multi-length flying shear of bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210122384.9A CN114453664A (en) | 2022-02-09 | 2022-02-09 | Method for improving shearing precision of multi-length flying shear of bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114453664A true CN114453664A (en) | 2022-05-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210122384.9A Pending CN114453664A (en) | 2022-02-09 | 2022-02-09 | Method for improving shearing precision of multi-length flying shear of bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114453664A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114871495A (en) * | 2022-06-06 | 2022-08-09 | 山东莱钢永锋钢铁有限公司 | Method for improving shearing precision of head-cutting flying shear |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107398477A (en) * | 2017-07-24 | 2017-11-28 | 中冶京诚工程技术有限公司 | Pulse equivalent measuring method and device for multiple length flying shear |
-
2022
- 2022-02-09 CN CN202210122384.9A patent/CN114453664A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107398477A (en) * | 2017-07-24 | 2017-11-28 | 中冶京诚工程技术有限公司 | Pulse equivalent measuring method and device for multiple length flying shear |
Non-Patent Citations (1)
| Title |
|---|
| 刘畅: "倍尺飞剪的剪切自动化控制", 《数字技术与应用》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114871495A (en) * | 2022-06-06 | 2022-08-09 | 山东莱钢永锋钢铁有限公司 | Method for improving shearing precision of head-cutting flying shear |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220510 |
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| RJ01 | Rejection of invention patent application after publication |