CN109759550B - Continuous casting billet end heat preservation device and method - Google Patents
Continuous casting billet end heat preservation device and method Download PDFInfo
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 212
- 238000004321 preservation Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005520 cutting process Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000002657 fibrous material Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 abstract description 18
- 238000005336 cracking Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 238000010583 slow cooling Methods 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000033764 rhythmic process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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Abstract
A continuous casting billet end heat preservation device and a continuous casting billet end heat preservation method belong to the technical field of continuous casting cutting equipment and process and are used for reducing the temperature difference between the continuous casting billet end and the tail part and keeping the temperature of a continuous casting billet uniform. The technical proposal is as follows: the rear part of the traveling device is opposite to the position of the continuous casting billet cutting gun, the rotating device is connected with the traveling slide block and the traveling screw rod of the traveling device, the continuous casting billet end heat-preserving cover is connected with the rotating mechanical arm of the rotating device, the shape of the inner cavity of the cover of the continuous casting billet end heat-preserving cover is matched with the shape of the section of the continuous casting billet end, and the signal input ends of the traveling device and the rotating device are respectively connected with the control device. The continuous casting machine keeps the temperature of the end part of the continuous casting blank in the process of waiting for cutting at the low speed of blank pulling, can effectively reduce the temperature difference between the end part and the tail part of the continuous casting blank, keeps the temperature of the continuous casting blank uniform, and prevents the end part crack defect and the cracking phenomenon of the end part of a rolled material of the continuous casting blank in the rolling process caused by the temperature of the end part of the continuous casting blank and the rapid temperature return after blank stacking.
Description
Technical Field
The invention relates to a heat preservation device and a heat preservation method for a continuous casting blank in a continuous casting machine roller way running at a low speed at a blank drawing speed in a cutting waiting process, and belongs to the technical field of continuous casting cutting equipment and processes.
Background
In the continuous casting billet production process, due to the requirements of rolling specification, yield and the like, the continuous casting billet needs to be cut into a certain fixed length, and in the cutting process, the continuous casting billet needs to run on a continuous casting machine roller way for a certain time at a slower billet drawing speed, so that a certain temperature difference (about 80-120 ℃) is formed between the end part and the tail part of the same continuous casting billet. This situation has the following drawbacks: on one hand, part of the produced continuous casting billet is sent to steel rolling through hot charging and directly rolled, and when the steel rolling heating furnace is added, the temperature difference of different parts of the continuous casting billet is large, so that the temperature of the continuous casting billet is not uniform, and the rolled material structure is not uniform; on the other hand, another part of continuous casting blanks enter a blank stack for slow cooling and then are rolled, in the process that the continuous casting blanks enter the blank stack for slow cooling, the temperature of the ends of the continuous casting blanks is larger, the temperature returning speed is high, and defects such as end cracks and the like are caused, and the defects can be further expanded in a steel rolling heating furnace, so that the end of a rolled material is cracked in the rolling process, a large amount of waste is thrown, and the product quality and the production cost are seriously influenced.
So far, no good method is available for solving the problem of large temperature difference between the end part and the tail part of the continuous casting blank, most enterprises adopt a casting blank pit-entering slow cooling method to reduce the influence of large temperature difference on the quality of a product, but the effect is not ideal, so that a good method is needed to solve the problem, thereby improving the quality of the product and reducing the production cost.
Disclosure of Invention
The invention aims to solve the technical problem of providing a continuous casting billet end heat preservation device and a continuous casting billet end heat preservation method, which can preserve heat of a continuous casting billet end waiting to be cut in low-speed operation on a roller way of a continuous casting machine, and achieve the purposes of reducing temperature difference between the continuous casting billet end and the tail part and keeping the temperature of the continuous casting billet uniform.
The technical scheme for solving the technical problems is as follows:
the utility model provides a continuous casting billet tip heat preservation device, it includes running gear, rotary device, continuous casting billet tip heat preservation cover, controlling means, running gear fixed mounting is outside the continuous casting machine rollgang, running gear's rear portion is relative with the position of continuous casting billet cutting rifle, rotary device installs on running gear, rotary device is connected with running gear's walking slider and walking lead screw, continuous casting billet tip heat preservation cover is connected with rotary mechanical arm of rotary device, the shape of the cover body cavity of continuous casting billet tip heat preservation cover matches with the section shape of continuous casting billet tip, controlling means is located outside the continuous casting machine rollgang, running gear, rotary device's signal input part is connected with controlling means respectively.
Above-mentioned continuous casting billet tip heat preservation device, running gear comprises running motor, walking gear group, walking lead screw, walking slider, walking lead screw fixed block, and the front end at running gear is installed to the running motor, and the running motor is connected with the walking gear group, and the output shaft of walking gear group is connected with the walking lead screw, and the both ends of walking lead screw are fixed a position by the walking lead screw fixed block, and the both ends and the walking lead screw locating piece of walking lead screw are by bearing running fit, have the hole on the walking slider, have the screw thread to mesh with the walking lead screw in the walking slider hole, and the upper end and the rotary device of walking slider are connected.
Above-mentioned continuous casting billet tip heat preservation device, rotary device comprises rotating electrical machines, rotary gear group, rotary mechanical arm, and the box bottom surface of rotary gear group is connected with running gear's walking slider upper end, and the rotating electrical machines is installed in rotary gear group's box top, and the rotating electrical machines is connected with rotary gear group, and rotary gear group's output shaft is connected with rotary mechanical arm's lower extreme, and continuous casting billet tip heat preservation cover is installed to rotary mechanical arm's upper end.
According to the continuous casting billet end heat preservation device, the continuous casting billet end heat preservation cover is composed of the outer high-temperature-resistant steel shell and the inner refractory fiber material, the refractory fiber material is fixed in the steel shell through the high-temperature-resistant bolt, and the shape of the inner cavity of the refractory fiber material of the continuous casting billet end heat preservation cover is matched with the shape of the section of the continuous casting billet end.
The continuous casting billet end heat preservation method using the equipment comprises the following steps:
a. after the head blank of the continuous casting blank is cut off, an operator presses a rotary button of a rotary mechanical arm through an operation panel of a control device, a rotary motor is started, the rotary mechanical arm is driven to rotate by the rotary motor through a rotary gear set, the rotary mechanical arm drives a heat preservation cover at the end part of the continuous casting blank to rotate to the end part of a first continuous casting blank, and the heat preservation cover at the end part of the continuous casting blank wraps the end part of the first continuous casting blank to preserve heat of the first continuous casting blank;
b. in the low-speed running process of the first continuous casting blank at the withdrawal speed of the withdrawal and straightening roller, an operator presses a traveling device advancing button through an operation panel of a control device, a traveling motor is started, the traveling motor drives a traveling gear set to rotate, the traveling gear set drives a traveling screw to rotate, a traveling slider connected to the traveling screw moves along the traveling screw, and the rotating speed of the traveling motor is adjusted to enable the traveling slider to run forwards at the withdrawal speed of the withdrawal and straightening roller;
c. when the first continuous casting billet reaches the cutting fixed-size length, cutting the continuous casting billet by a cutting gun, after the first continuous casting billet is cut off, pressing a rotary button of a rotary mechanical arm by an operator through an operation panel of a control device, and driving a heat insulation cover at the end part of the continuous casting billet to rapidly unscrew by the rotary mechanical arm, wherein the cut continuous casting billet is rapidly opened by a conveying roller way;
d. after the first continuous casting blank is quickly opened by the conveying roller way, an operator presses a backward button of the traveling device through an operation panel of the control device, and the traveling motor starts to reversely rotate to drive the traveling slide block to quickly return to the initial position;
e. after the traveling slide block returns to the initial position, an operator presses a rotary button of the rotary mechanical arm through an operation panel of the control device, the rotary motor is started, the rotary gear set drives the rotary mechanical arm to rotate the continuous casting billet end heat preservation cover to the end of the second continuous casting billet, the second continuous casting billet end is wrapped to preserve heat, and the like, and the continuous casting billet end is continuously preserved.
The beneficial effects of the invention are as follows:
the continuous casting slab end heat preservation device can preserve heat of the end part of the continuous casting slab when the continuous casting slab runs at a low speed on a roller way of a continuous casting machine, can reduce the temperature difference between the end part and the tail part of the continuous casting slab, keeps the temperature of the continuous casting slab uniform, reduces the end crack defect caused by low temperature of the end part of the continuous casting slab and quick temperature return after the slab is piled up, and reduces the cracking phenomenon of the end part of a rolled material in the rolling process of the continuous casting slab.
Compared with the conventional pit-entering slow cooling method for solving the defects of the end part of the continuous casting billet, the method has the following advantages:
(1) The space requirements are different. Conventional continuous casting blanks are slowly cooled in pits, so that the occupied space is large and the investment cost is high. The invention can be realized by utilizing the gap between roller tables of the continuous casting machine on a single site.
(2) The heat preservation positions are different. The invention adopts a special continuous casting billet end heat preservation device aiming at low temperature of the continuous casting billet end, and preserves heat of the continuous casting billet end, thereby achieving the effect of reducing the temperature difference between the head and the tail of the continuous casting billet. The conventional slow cooling of the continuous casting blank into the pit is to preserve the heat of the whole continuous casting blank, and the temperature difference between the head and the tail of the continuous casting blank cannot be effectively reduced.
(3) The flexibility is different. The invention has simple principle and convenient manufacture, and can adjust the length of the running track according to the fixed length of different continuous casting billets and adjust the size of the heat-insulating cover at the end part of the continuous casting billets according to the sections of different continuous casting billets. The requirement of conventional continuous casting blank pit entry slow cooling on a slow cooling pit is required to meet the maximum fixed length, and the longer the fixed length of the continuous casting blank is, the larger the requirement on the field is.
(4) The influence on the production rhythm is different. The invention can continuously and online keep the temperature of the end part of the continuous casting billet, and can not influence the production rhythm. The conventional slow cooling of the continuous casting blank entering the pit generally requires a certain slow cooling time, influences the rolling of the continuous casting blank, and cannot meet the requirement of fast-paced production.
(5) The application ranges are different. The invention can carry out end heat preservation on all steel continuous casting blanks, and is not limited by the steel types. Conventional continuous casting blank pit entry slow cooling is limited to the number of pit entry slow cooling, and only partial steel grades can be selected for pit entry slow cooling.
(6) The section size of the heat preservation device can be changed according to the section of the continuous casting billet, thereby meeting the heat preservation requirements of the ends of the continuous casting billets with different sections, and the length of the running device can be adjusted according to the specified length of the casting billets, thereby meeting the heat preservation requirements of the ends of the continuous casting billets with different specified lengths.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view and bottom view of the end heat shield of the continuous casting billet of the present invention;
FIG. 3 is a schematic view of a rotary device according to the present invention;
fig. 4 is a schematic view of the structure of the walking device of the present invention.
The figures are labeled as follows: the continuous casting billet casting machine comprises a traveling device 1, a conveying roller way 2, a rotating device 3, a continuous casting billet end heat preservation cover 4, a continuous casting billet 5, a cutting gun 6, a withdrawal and straightening roller 7, a control device 8, a steel shell 9, a refractory fiber material 10, a rotating motor 11, a rotating gear set 12, a rotating mechanical arm 13, a traveling motor 14, a traveling gear set 15, a traveling screw 16, a traveling slide block 17 and a traveling screw fixing block 18.
Detailed Description
In the process of waiting for cutting, the continuous casting blank is run at a low speed at a blank pulling speed by the roller way of the continuous casting machine, and the end part of the continuous casting blank is insulated by the continuous casting blank end part insulation device, so that the temperature difference between the end part and the tail part of the continuous casting blank can be effectively reduced, the temperature of the continuous casting blank is kept uniform, and the end part crack defect and the cracking phenomenon of the rolled material end part of the continuous casting blank in the rolling process caused by the temperature of the end part of the continuous casting blank and the quick temperature return after the continuous casting blank is piled up are prevented.
The continuous casting billet end heat preservation device comprises a traveling device 1, a rotating device 3, a continuous casting billet end heat preservation cover 4 and a control device 8.
Fig. 1 shows that the overall structure of the present invention is: the running gear 1 is fixedly arranged outside the continuous casting machine conveying roller way 2, the rear part of the running gear 1 is opposite to the position of the continuous casting billet cutting gun 6, the rotating device 3 is arranged on the running gear 1, the continuous casting billet end heat preservation cover 4 is connected with the rotating device 3, the continuous casting billet end heat preservation cover is opposite to the continuous casting billet 5 end, the control device 8 is arranged outside the continuous casting machine conveying roller way 2, and the signal input ends of the running gear 1 and the rotating device 3 are respectively connected with the control device 8.
Fig. 1 and 2 show that the strand end heat shield 4 consists of an outer high temperature resistant steel shell 9 and an inner refractory fiber material 10. The refractory fiber material 10 is fixed inside the steel shell 9 through a high-temperature-resistant bolt, and the steel shell 9, the bolt and the refractory fiber material 10 are required to be resistant to high temperature of above 1300 ℃ for long-time use without damage. The shape of the inner cavity of the refractory fiber material of the continuous casting blank end heat preservation cover 4 is matched with the shape of the cross section of the end of the continuous casting blank 5, the heat preservation cover is suitable for the cross section of the continuous casting blank 5, the cross sections of the continuous casting blank 5 are different, and the heat preservation cover is different in size.
Fig. 1 and 3 show that the rotating device 3 is composed of a rotating motor 11, a rotating gear set 12 and a rotating mechanical arm 13. The bottom surface of the box body of the rotary gear set 12 is connected with the upper end of a traveling slide block 17 of the traveling device 1, the rotary motor 11 is arranged above the box body of the rotary gear set 12, the rotary motor 11 is connected with the rotary gear set 12, the output shaft of the rotary gear set 12 is connected with the lower end of the rotary mechanical arm 13, and the upper end of the rotary mechanical arm 13 is provided with the continuous casting blank end heat preservation cover 4. When the rotary motor 11 rotates, the rotary gear set 12 drives the rotary mechanical arm 13 to rotate, the rotary mechanical arm 13 can rotate 180 degrees, and the rotary mechanical arm 13 rotates the continuous casting billet end heat insulation cover 4 to the heat insulation position.
Fig. 1 and 4 show that the traveling device 1 is composed of a traveling motor 14, a traveling gear set 15, a traveling screw 16, a traveling slide block 17 and a traveling screw fixing block 18. The walking motor 14 is arranged at the front end of the walking device 1, the walking motor 14 is connected with the walking gear set 15, the output shaft of the walking gear set 15 is connected with the walking screw 16, and the walking motor 14 drives the walking screw 16 to rotate through the walking gear set 15. The two ends of the walking screw 16 are positioned by the walking screw fixing blocks 18, and the two ends of the walking screw 16 are in running fit with the walking screw positioning blocks 18 by bearings. The traveling slide block 17 is provided with an inner hole, the inner hole of the traveling slide block 17 is in threaded engagement with the traveling screw rod 16, and the upper end of the traveling slide block 17 is connected with the rotating device 3. When the traveling screw 16 rotates, the traveling slide block 17 moves along the traveling screw 16, and the rotating device 3 can be driven to move together. The traveling motor 14 can control the traveling slide block 17 to move forward along the traveling screw rod 16 at the withdrawal speed of the withdrawal and straightening roller 7, so that the heat preservation cover 4 at the end part of the continuous casting billet and the continuous casting billet 5 are kept at a relative static position for heat preservation.
The continuous casting billet end heat preservation method using the continuous casting billet end heat preservation device comprises the following steps:
a. after the head blank of the continuous casting blank is cut off, an operator presses a rotary button of a rotary mechanical arm 13 through an operation panel of a control device 8, a rotary motor 11 is started, the rotary mechanical arm 13 is driven to rotate by the rotary motor 11 through a rotary gear set 12, the rotary mechanical arm 13 drives a continuous casting blank end heat preservation cover 4 to rotate to the end part of a first continuous casting blank 5, and the end part of the first continuous casting blank 5 is wrapped by the continuous casting blank end heat preservation cover 4 to preserve heat;
b. in the low-speed running process of the first continuous casting billet 5 at the withdrawal speed of the withdrawal and straightening roller 7, an operator presses a traveling device advancing button through an operation panel of the control device 8, a traveling motor 14 is started, the traveling motor 14 drives a traveling gear set 15 to rotate, the traveling gear set 15 drives a traveling screw 16 to rotate, a traveling slide block 17 connected to the traveling screw 16 moves along the traveling screw 16, and the rotating speed of the traveling motor 14 is adjusted to enable the traveling slide block 17 to run forwards at the withdrawal and straightening roller 7 withdrawal speed;
c. when the first continuous casting billet 5 reaches the cutting fixed-size length, the continuous casting billet 5 is cut off by the cutting gun 6, after the first continuous casting billet 5 is cut off, an operator presses a rotary button of a rotary mechanical arm through an operation panel of the control device 8, the rotary mechanical arm 13 drives the continuous casting billet end heat preservation cover 4 to rapidly unscrew, and the cut continuous casting billet 5 is rapidly opened through the conveying roller way 2;
d. after the first continuous casting billet 5 is rapidly opened by the conveying roller way 2, an operator presses a traveling device back button through an operation panel of the control device 8, and the traveling motor 14 starts reverse rotation to drive the traveling slide block 17 to rapidly back to the initial position;
e. after the traveling slide block 17 returns to the initial position, an operator presses a rotary button of the rotary mechanical arm through an operation panel of the control device 8, the rotary motor 11 is started, the rotary gear set 12 drives the rotary mechanical arm 13 to rotate the continuous casting billet end heat preservation cover 4 to the end part of the second continuous casting billet 5, the second continuous casting billet end part is wrapped to preserve heat, and the like, and the continuous casting billet end part is continuously preserved.
The continuous casting billet end heat preservation method of the invention has the following partial parameters:
the surface temperature of the continuous casting blank is 850-1050 ℃;
the specified length of the continuous casting blank is 3-12m;
the blank pulling speed of the drawing and straightening machine is between 0.5 and 1.5 m/min;
continuous casting billet section: 150 x 150mm, 180 x 180mm, 220 x 300mm, 280 x 320mm, 300 x 360mm.
Embodiments of the invention are as follows:
example 1:
the continuous casting machine with the section of 220 mm is used for producing steel grade 8620RH, the specified length is 6m, the continuous casting blank with the specified length is 1, the end part of the continuous casting blank is insulated by the continuous casting blank end part insulation device provided by the invention and then is cooled in a blank stack, the continuous casting blank with the section of 2 is slowly cooled in a pit for 36h, and the continuous casting blank with the specified length is 3 and is directly connected into the blank stack for cooling. And each of the three continuous casting billets measures the temperature of the head and the tail, and the three continuous casting billets respectively compile auxiliary clamps to track the rolling effect. The tracking results are shown in the following table:
by adopting the invention to preserve heat at the end of the continuous casting billet, the average temperature difference between the head and the tail of the continuous casting billet is greatly reduced.
By adopting the method, the rolling cracking phenomenon is eliminated, and the traditional pit-entering slow cooling mode is improved but the rolling cracking can not be completely eliminated.
Example 2:
the continuous casting machine with the section of 220 mm is used for producing the steel grade 38MnVS6, the continuous casting blank with the fixed length of 3m and 1 is cooled in a blank stack after the end part of the continuous casting blank is insulated by adopting the continuous casting blank end part insulation device provided by the invention, the 2 continuous casting blank is slowly cooled in a pit for 36h, and the 3 continuous casting blank is directly cooled in the blank stack. And each of the three continuous casting billets measures the temperature of the head and the tail, and the three continuous casting billets respectively compile auxiliary clamps to track the rolling effect. The tracking results are shown in the following table:
by adopting the invention to preserve heat at the end of the continuous casting billet, the average temperature difference between the head and the tail of the continuous casting billet is greatly reduced.
By adopting the method, the rolling cracking phenomenon is eliminated, and the traditional pit-entering slow cooling mode is improved but the rolling cracking can not be completely eliminated.
Example 3:
220 x 300mm section continuous casting machine, steel grade GC15 is produced, the continuous casting blank with the specified length of 5m and 1 is cooled in a blank stack after being subjected to end heat preservation by adopting the continuous casting blank end heat preservation device, 2 the continuous casting blank is slowly cooled in a pit for 36h, and 3 the continuous casting blank is directly cooled in the blank stack. And each of the three continuous casting billets measures the temperature of the head and the tail, and the three continuous casting billets respectively compile auxiliary clamps to track the rolling effect. The tracking results are shown in the following table:
by adopting the invention to preserve heat at the end of the continuous casting billet, the average temperature difference between the head and the tail of the continuous casting billet is greatly reduced.
By adopting the method, the rolling cracking phenomenon is eliminated, and the traditional pit-entering slow cooling mode is improved but the rolling cracking can not be completely eliminated.
Claims (3)
1. A continuous casting billet end heat preservation device is characterized in that: the continuous casting billet cutting machine comprises a traveling device (1), a rotating device (3), a continuous casting billet end heat-preserving cover (4) and a control device (8), wherein the traveling device (1) is fixedly arranged on the outer side of a continuous casting machine conveying roller way (2), the rear part of the traveling device (1) is opposite to the position of a continuous casting billet cutting gun (6), the rotating device (3) is arranged on the traveling device (1), the rotating device (3) is connected with a traveling slide block (17) and a traveling screw (16) of the traveling device (1), the continuous casting billet end heat-preserving cover (4) is connected with a rotating mechanical arm (13) of the rotating device (3), the shape of a cover body cavity of the continuous casting billet end heat-preserving cover (3) is matched with the shape of a section of the end of a continuous casting billet (5), the control device (8) is arranged outside the continuous casting machine conveying roller way (2), and signal input ends of the traveling device (1) and the rotating device (3) are respectively connected with the control device (8).
The walking device (1) is composed of a walking motor (14), a walking gear set (15), a walking screw (16), a walking sliding block (17) and a walking screw fixing block (18), wherein the walking motor (14) is arranged at the front end of the walking device (1), the walking motor (14) is connected with the walking gear set (15), an output shaft of the walking gear set (15) is connected with the walking screw (16), two ends of the walking screw (16) are positioned by the walking screw fixing block (18), two ends of the walking screw (16) are in running fit with the walking screw fixing block (18) through bearings, an inner hole is formed in the walking sliding block (17), threads are meshed with the walking screw (16) in the inner hole of the walking sliding block (17), and the upper end of the walking sliding block (17) is connected with the rotating device (3);
the rotating device (3) consists of a rotating motor (11), a rotating gear set (12) and a rotating mechanical arm (13), wherein the bottom surface of a box body of the rotating gear set (12) is connected with the upper end of a traveling slide block (17) of the traveling device (1), the rotating motor (11) is arranged above the box body of the rotating gear set (12), the rotating motor (11) is connected with the rotating gear set (12), an output shaft of the rotating gear set (12) is connected with the lower end of the rotating mechanical arm (13), and a continuous casting blank end heat preservation cover (4) is arranged at the upper end of the rotating mechanical arm (13).
2. The strand end heat preservation apparatus of claim 1, wherein: the continuous casting billet end heat preservation cover (4) consists of an external high-temperature-resistant steel shell (9) and an internal refractory fiber material (10), the refractory fiber material (10) is fixed inside the steel shell (9) through a high-temperature-resistant bolt, and the shape of the inner cavity of the refractory fiber material (10) of the continuous casting billet end heat preservation cover (4) is matched with the shape of the section of the end part of the continuous casting billet (5).
3. A method for insulating the end of a continuous casting using the insulating device according to claim 1 or 2, characterized in that: the method comprises the following steps:
a. after the continuous casting billet head billet is cut off, an operator presses a rotary button of a rotary mechanical arm through an operation panel of a control device (8), a rotary motor (11) is started, the rotary mechanical arm (13) is driven to rotate by the rotary motor (11) through a rotary gear set (12), the rotary mechanical arm (13) drives a continuous casting billet end heat preservation cover (4) to rotate to the end part of a first continuous casting billet (5), and the continuous casting billet end heat preservation cover (4) wraps the end part of the first continuous casting billet (5) to preserve heat;
b. in the low-speed running process of the first continuous casting billet (5) at the billet withdrawal speed of the withdrawal and straightening roller (7), an operator presses a traveling device advancing button through an operation panel of a control device (8), a traveling motor (14) is started, the traveling motor (14) drives a traveling gear set (15) to rotate, the traveling gear set (15) drives a traveling screw (16) to rotate, a traveling slide block (17) connected to the traveling screw (16) moves along the traveling screw (16), and the rotating speed of the traveling motor (14) is adjusted to enable the traveling slide block (17) to run forwards at the billet withdrawal speed of the withdrawal and straightening roller (7);
c. when the first continuous casting billet (5) reaches the cutting fixed-size length, the continuous casting billet (5) is cut off by the cutting gun (6), after the first continuous casting billet (5) is cut off, an operator presses a rotary button of a rotary mechanical arm through an operation panel of the control device (8), and the rotary mechanical arm (13) drives the continuous casting billet end heat insulation cover (4) to rapidly unscrew, and the cut continuous casting billet (5) is rapidly opened through the conveying roller way (2);
d. after the first continuous casting billet (5) is rapidly opened by the conveying roller way (2), an operator presses a backward button of the traveling device through an operation panel of the control device (8), and the traveling motor (14) starts reverse rotation to drive the traveling slide block (17) to rapidly return to the initial position;
e. after the traveling slide block (17) returns to the initial position, an operator presses a rotary mechanical arm rotary button through an operation panel of the control device (8), the rotary motor (11) is started, the rotary gear set (12) drives the rotary mechanical arm (13) to rotate the continuous casting billet end heat preservation cover (4) to the end part of the second continuous casting billet (5), the end part of the second continuous casting billet (5) is wrapped to preserve heat, and the like, and the end part of the continuous casting billet is continuously preserved.
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| CN109759550A (en) | 2019-05-17 |
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