CN112122363A - Method for detecting internal cooling-to-temperature time of roller in cold treatment process - Google Patents
Method for detecting internal cooling-to-temperature time of roller in cold treatment process Download PDFInfo
- Publication number
- CN112122363A CN112122363A CN202010946978.2A CN202010946978A CN112122363A CN 112122363 A CN112122363 A CN 112122363A CN 202010946978 A CN202010946978 A CN 202010946978A CN 112122363 A CN112122363 A CN 112122363A
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- CN
- China
- Prior art keywords
- roller
- temperature
- time
- deep hole
- cold treatment
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
-
- 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
- B21B27/06—Lubricating, cooling or heating rolls
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a method for detecting the time of cooling the interior of a roller to the temperature in the cold treatment process of the roller, which comprises the steps of taking 1 roller, drilling a deep hole of 500mm on the end surface of the roller; tapping M22 threads at the deep hole opening, wherein the length of the threads is 50 mm; inserting an external thermocouple into the deep hole, enabling the temperature measuring end of the thermocouple to be close to the inner wall of the hole, fixing the deep hole opening by using a 22-bolt, and connecting the thermocouple with a display instrument; and (3) hanging the roller into a cooling tank, starting liquid nitrogen, starting a cooling program, observing the time from room temperature to-80 ℃ of a temperature measuring instrument, and determining the time as the process time from cold treatment to temperature of the roller. The invention can set the cold treatment process time according to different hardening layer depth requirements of the roller, reduce the cold treatment cost and improve the cold treatment efficiency.
Description
Technical Field
The invention belongs to the field of cold treatment of rollers, and particularly relates to a method for detecting the time of cooling to the temperature inside a roller in the cold treatment process of the roller.
Background
As an important part in metal rolling, how to improve the service life of a roll and the surface quality of a rolled product is an important issue in the field of metal rolling. In the rolling process of metal, the surface temperature of the roller is increased due to rolling deformation heat, friction heat, the heat of a rolled piece and the like, and the roller has the phenomena of surface heat cracking, oxidation, roller fracture and the like. Therefore, one of the important measures in the field of metal rolling is to improve the service life of the roll and to properly cool the roll.
The cooling technology of the surface of the roller can be generally divided into an internal cooling technology and an external cooling technology, and the two cooling modes can achieve the effect of taking away the heat on the surface of the roller in the rolling process to cool the roller. In roll cooling, the end of the cooling process is determined depending on whether the cooling temperature is reached. In the conventional process, the degree of cooling is controlled by measuring the cooling temperature of a cooling device, a cooling environment or the surface of a roller, but the temperature inside the roller cannot be accurately measured among the above elements, so that the finishing temperature is different from the temperature inside the roller, and the general finishing temperature is higher than the temperature inside the roller, so that the roller still has the hidden troubles of surface heat cracking, oxidation, roller fracture and the like.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to overcome the defects of the prior art and provide a method for detecting the internal cooling-to-temperature time of a roller in the cold treatment process.
The technical scheme is as follows: in order to achieve the above object, the present invention is specifically realized as follows: a method for detecting the time of cooling to the temperature inside a roll during cold treatment of the roll, comprising the steps of:
(1) taking 1 roller, and drilling a deep hole of 500mm on the end face of the roller;
(2) tapping M22 threads at the deep hole opening, wherein the length of the threads is 50 mm;
(3) inserting an external thermocouple into the deep hole, enabling the temperature measuring end of the thermocouple to be close to the inner wall of the hole, fixing the deep hole opening by using a 22-bolt, and connecting the thermocouple with a display instrument;
(4) and (3) hanging the roller into a cooling tank, starting liquid nitrogen, starting a cooling program, observing the time from room temperature to-80 ℃ of a temperature measuring instrument, and determining the time as the process time from cold treatment to temperature of the roller.
Wherein, the diameter of the roller in the step (1) is more than or equal to 500 mm.
Wherein, the deep hole distance is not less than 500 mm.
A most preferred method for detecting the time to cool the interior of a roll to a warm temperature comprises the steps of:
(1) taking 1 roller, and drilling 500mm deep holes at 20mm and 35mm positions of the end surface of the roller;
(2) the length of M22 threads is tapped at two deep hole orifices respectively and is 50 mm;
(3) inserting an external thermocouple into the deep hole, enabling the temperature measuring end of the thermocouple to be close to the inner wall of the hole, fixing the deep hole opening by using a 22-bolt, and connecting the thermocouple with a display instrument;
(4) and (3) hanging the roller into a cooling tank, starting liquid nitrogen, observing the time from room temperature to-80 ℃ of a temperature measuring instrument, and taking the average value of the two times as the process time from cold treatment to temperature of the roller.
The main principle is as follows: in the cold treatment process of the roller, the whole surface of the roller is wrapped in liquid nitrogen, the temperature is uniformly conducted from outside to inside, and the temperature of the 2 deep holes represents the temperature in the cold treatment process of the interior of the roller.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) the invention can set the cold treatment process time according to different hardening layer depth requirements of the roller, reduce the cold treatment cost and improve the cold treatment efficiency;
(2) the invention can be suitable for all rollers needing cold treatment, preferably, the deep holes of 20mm and 30mm are determined according to the depth (diameter direction) of a hardening layer of the roller, and the holes at the two positions are more favorable for saving the cost through measurement and calculation;
(3) the distance between the deep holes is designed to be 500mm, the main reason is that liquid nitrogen permeates into the threaded connection part between the thermocouple and the end face of the roller to influence the temperature measuring end of the thermocouple, and the length of 500mm can effectively avoid the phenomenon.
Detailed Description
Example 1:
the method for detecting the cooling time to the temperature in the cold treatment process of the roller comprises the following steps:
(1) taking 1 roller, and drilling a deep hole of 500mm on the end face of the roller;
(2) tapping M22 threads at the deep hole opening, wherein the length of the threads is 50 mm;
(3) inserting an external thermocouple into the deep hole, enabling the temperature measuring end of the thermocouple to be close to the inner wall of the hole, fixing the deep hole opening by using a 22-bolt, and connecting the thermocouple with a display instrument;
(4) and (3) hanging the roller into a cooling tank, starting liquid nitrogen, starting a cooling program, observing the time from room temperature to-80 ℃ of a temperature measuring instrument, and determining the time as the process time from cold treatment to temperature of the roller.
Example 2:
an optimal method for detecting the time for cooling the interior of a roller to the temperature in the cold treatment process of the roller comprises the following steps:
(1) taking 1 roller, and drilling 500mm deep holes at 20mm and 35mm positions of the end surface of the roller;
(2) the length of M22 threads is tapped at two deep hole orifices respectively and is 50 mm;
(3) inserting an external thermocouple into the deep hole, enabling the temperature measuring end of the thermocouple to be close to the inner wall of the hole, fixing the deep hole opening by using a 22-bolt, and connecting the thermocouple with a display instrument;
(4) and (3) hanging the roller into a cooling tank, starting liquid nitrogen, observing the time from room temperature to-80 ℃ of a temperature measuring instrument, and taking the average value of the two times as the process time from cold treatment to temperature of the roller.
Claims (4)
1. A method for detecting the time of cooling to the temperature inside a roll during cold treatment of the roll, comprising the steps of:
(1) taking 1 roller, and drilling a deep hole of 500mm on the end face of the roller;
(2) tapping M22 threads at the deep hole opening, wherein the length of the threads is 50 mm;
(3) inserting an external thermocouple into the deep hole, enabling the temperature measuring end of the thermocouple to be close to the inner wall of the hole, fixing the deep hole opening by using a 22-bolt, and connecting the thermocouple with a display instrument;
(4) and (3) hanging the roller into a cooling tank, starting liquid nitrogen, starting a cooling program, observing the time from room temperature to-80 ℃ of a temperature measuring instrument, and determining the time as the process time from cold treatment to temperature of the roller.
2. The method for detecting the time taken for the interior of a roll to cool down to the temperature during the cold treatment of the roll as set forth in claim 1, wherein the diameter of the roll in the step (1) is 500mm or more.
3. The method for detecting the time for its inside to cool to warm temperature in the cold processing of a roll according to claim 1, wherein the deep hole distance is not less than 500 mm.
4. The method for detecting the time for which the interior of a roll is cooled to a warm temperature in a cold processing of the roll according to claim 1, comprising the steps of:
(1) taking 1 roller, and drilling 500mm deep holes at 20mm and 35mm positions of the end surface of the roller;
(2) the length of M22 threads is tapped at two deep hole orifices respectively and is 50 mm;
(3) inserting an external thermocouple into the deep hole, enabling the temperature measuring end of the thermocouple to be close to the inner wall of the hole, fixing the deep hole opening by using a 22-bolt, and connecting the thermocouple with a display instrument;
(4) and (3) hanging the roller into a cooling tank, starting liquid nitrogen, observing the time from room temperature to-80 ℃ of a temperature measuring instrument, and taking the average value of the two times as the process time from cold treatment to temperature of the roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010946978.2A CN112122363A (en) | 2020-09-10 | 2020-09-10 | Method for detecting internal cooling-to-temperature time of roller in cold treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010946978.2A CN112122363A (en) | 2020-09-10 | 2020-09-10 | Method for detecting internal cooling-to-temperature time of roller in cold treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112122363A true CN112122363A (en) | 2020-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010946978.2A Pending CN112122363A (en) | 2020-09-10 | 2020-09-10 | Method for detecting internal cooling-to-temperature time of roller in cold treatment process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620701A (en) * | 2011-06-30 | 2012-08-01 | 宝钢集团常州轧辊制造公司 | Method for measuring depth of roller body hardening layer |
| CN103230945A (en) * | 2013-04-28 | 2013-08-07 | 大连华锐重工集团股份有限公司 | On-line temperature measuring device for surfaces of rolls of strip rolling mill and testing method of on-line temperature measuring device |
| CN104195297A (en) * | 2014-08-21 | 2014-12-10 | 宜兴市永昌轧辊有限公司 | Inductor used in quenching of large-scale forged steel supporting roll |
| CN106391731A (en) * | 2016-10-19 | 2017-02-15 | 宝鸡石油钢管有限责任公司 | Steel pipe roller bed cooling adjusting device |
| CN107000001A (en) * | 2014-11-27 | 2017-08-01 | Sms集团有限公司 | Apparatus and method for cooled roller |
-
2020
- 2020-09-10 CN CN202010946978.2A patent/CN112122363A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620701A (en) * | 2011-06-30 | 2012-08-01 | 宝钢集团常州轧辊制造公司 | Method for measuring depth of roller body hardening layer |
| CN103230945A (en) * | 2013-04-28 | 2013-08-07 | 大连华锐重工集团股份有限公司 | On-line temperature measuring device for surfaces of rolls of strip rolling mill and testing method of on-line temperature measuring device |
| CN104195297A (en) * | 2014-08-21 | 2014-12-10 | 宜兴市永昌轧辊有限公司 | Inductor used in quenching of large-scale forged steel supporting roll |
| CN107000001A (en) * | 2014-11-27 | 2017-08-01 | Sms集团有限公司 | Apparatus and method for cooled roller |
| CN106391731A (en) * | 2016-10-19 | 2017-02-15 | 宝鸡石油钢管有限责任公司 | Steel pipe roller bed cooling adjusting device |
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Application publication date: 20201225 |
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