CN106424160A - Rolled steel production line capable of meeting after-rolling cooling control requirements of multiple alloy steel bars - Google Patents

Abstract

The invention provides a steel rolling production line capable of realizing the controlled cooling requirements of various alloy steel bars after rolling, comprising a rolling mill (1), double-length flying shears (3), a hot bed (4), and a cooling bed (5) connected in sequence ), the first saw (6) and the second saw (7), the cooling range of the rolled piece (12) on the hot bed (4) is less than the cooling range of the rolled piece (12) on the cooling bed (5), and the hot bed (4) Contain input roller table (41), traversing trolley (44) and output roller table (47), the input roller table (41) of heating bed (4) is located in double ruler flying shear (3) and cooling bed (5) ), the output roller table (47) of the heated bed (4) is located between the first saw (6) and the second saw (7). The steel rolling production line that can realize the controlled cooling requirements after rolling of various alloy steel bars can not only meet the requirements of high temperature slow cooling materials for higher collection temperature, but also take into account the high output requirements of low temperature slow cooling materials and conventional cooling materials.

Description

A steel rolling production line that can realize the controlled cooling requirements of various alloy steel bars after rolling

technical field

The invention relates to the field of steel rolling equipment, in particular to a steel rolling production line capable of realizing the requirements of controlled cooling after rolling of various alloy steel bars.

Background technique

Different alloy steel long products have completely different requirements on the controlled cooling process after rolling. For example, bearing steel and spring steel require rapid cooling and then slow cooling at low temperature after rolling, while gear steel requires rapid collection to achieve high temperature and slow cooling after rolling. Therefore, different processing methods should be used to produce different alloy steel grades. However, the layout of the post-rolling area of the current long steel rolling workshop is relatively simple, and it is difficult to meet the production process requirements of various steel types. The main shortcomings are as follows:

1. The existing steel rolling production line is equipped with a water cooling box 2, a cooling bed 5, a cut-to-length saw (including the first saw 6, the second saw 7, the third saw 8 and the fourth saw 9), and a collection table in the post-rolling area and other devices (as shown in Figure 1), the high-temperature slow-cooling material and the low-temperature slow-cooling material both adopt the same process route, but the process layout and equipment structure design are mainly considered to meet the requirements of cooling to low temperature, and it is difficult to take into account the high-temperature slow cooling temperature requirements.

2. Some production lines add a chain device that can move quickly across the cooling bed, but this leads to complex structure of the cooling bed, high failure rate, and difficult maintenance, and the final actual utilization rate is not high.

3. In order to achieve a higher hourly output, there are 4 fixed-length saws behind the cooling bed to cut to fixed lengths. However, the arrangement of the sawing area is too long, which increases the passing time of steel materials and cannot meet the requirements of high-temperature slow-cooled materials for collection temperature.

Contents of the invention

In order to meet the requirements of different controlled cooling processes after rolling of different steel types, the invention provides a steel rolling production line that can realize the controlled cooling requirements of various alloy steel bars after rolling, which can realize the controlled cooling of various alloy steel bars The required steel rolling production line can not only meet the requirements of higher collection temperature for high-temperature slow-cooled materials, but also take into account the high output requirements of low-temperature slow-cooled materials and conventional cooling materials.

The technical solution adopted by the present invention to solve the technical problem is: a steel rolling production line that can realize the cooling control requirements after rolling of various alloy steel bars, including successively connected rolling mills, double-foot flying shears, cooling beds, first saws and The second saw, the steel rolling production line that can realize the controlled cooling requirements of various alloy steel bars after rolling also includes a hot bed for moving and cooling the rolled piece, the temperature drop of the rolled piece on the hot bed is smaller than that of the rolled piece on the cold bed The heating bed contains input roller table, traversing trolley and output roller table. The input roller table of the heating bed is located between the double-foot flying shear and the input roller table of the cooling bed. The output roller table of the heating bed is located between the first saw and the second saw. Between two saws.

The steel rolling production line that can realize the controlled cooling requirements of various alloy steel bars after rolling also includes a water cooling box, which is located between the rolling mill and the double-size flying shear, and can realize the controlled cooling requirements of various alloy steel bars after rolling. The production line also includes a third saw, a fourth saw, a first collection table and a second collection table arranged in sequence after the second saw, and the cooling range of the rolled piece on the first collection table is smaller than that of the rolled piece on the second collection table. Cooling rate.

The hot bed also contains a swing receiving mechanism that can collect the rolling pieces on the input roller table. The swing receiving mechanism is located between the input roller table and the traverse trolley. The swing receiving mechanism includes a bracket that can swing up and down. At the lower limit position, the bracket can collect the rolling pieces from the input roller table; when the bracket swings from the lower limit position to the upper limit position, the traversing trolley traverses to the bottom of the bracket; when the bracket moves from the upper limit position In the process of swinging to the lower limit position, the rolling pieces collected and placed on the bracket can fall on the traversing trolley.

The brackets are arranged one by one in the interval of the input roller table. One end of the bracket is connected and fixed with the first rotating shaft, and the other end of the bracket is connected and fixed with the driving mechanism. A placement slot, when the bracket is at the upper limit position, the lower end of the first placement slot is higher than the upper surface of the traverse trolley; when the bracket is at the lower limit position, the upper end of the first placement slot The position is lower than the position on the upper surface of the traverse trolley.

The rollers on the input roller table are set obliquely, and the hot bed also has a pushing mechanism, which is used to push the rolling pieces on the input roller table into the bracket of the swing material receiving mechanism. The pushing mechanism is located between the swing material receiving mechanism and the input between the roller tables.

The pushing mechanism includes a pushing head, a transmission connecting rod and a driving hydraulic cylinder connected in sequence. The pushing head can swing up and down on the third rotating shaft, and the driving hydraulic cylinder can drive the driving connecting rod to rotate back and forth on the fourth rotating shaft. When the head swings up, it can push the rolling piece on the input roller table into the bracket.

The hot bed device for quickly collecting the rolled alloy steel bars also includes a discharge trolley capable of transferring the rolled pieces on the traverse trolley to the output roller table.

The unloading trolley contains the unloading arm, and the unloading trolley also has a power mechanism for making the unloading arm swing up and down with the second rotating shaft as the axis. When the unloading arm swings from the lower limit position to the upper limit position, the unloading trolley It can lift the rolling piece on the traversing trolley to the unloading arm. When the unloading arm swings from the upper limit position to the lower limit position, the unloading trolley can make the rolling piece on the unloading arm fall on the output roller table .

The unloading arm consists of a horizontal section and an inclined section connected in sequence. The horizontal section of the unloading arm is provided with a second storage slot for collecting and placing rolled pieces. When the unloading arm is at the lower limit position, the horizontal section is horizontal. state, the position of the lower surface of the second placement groove is lower than the position of the upper end surface of the output roller table; when the unloading arm is at the upper limit position, the horizontal section is inclined upward, and the position of the lower end of the second placement groove is higher than The location of the upper surface of the unloading trolley.

The horizontal section of the unloading arm is connected to the power mechanism, and the inclined section of the unloading arm is connected to the second rotating shaft. material organization.

The beneficial effects of the present invention are:

1. The steel that needs high temperature and slow cooling is quickly moved across the hot bed to the sawing area. Three saws are used to cut to a fixed length. The traverse speed is fast and the distance between the sawing areas is short, which shortens the cooling time and meets The steel with specifications above and above shall not be lower than 650°C and enter the slow cooling pit.

2. The low-temperature slow-cooling material and conventional cooling material are still cut to length with 4 saws, which can meet the requirements of high output and high yield.

3. The heating bed and cooling bed are arranged separately, the structure of the equipment is simple and reliable, and maintenance can be carried out separately without affecting the production and use of the other equipment, and the use efficiency is high.

4. Using the hot bed output roller table as the sawing roller table of the first saw, on the one hand, the length of the entire sawing area is not increased, and on the other hand, the length of the sawing area after the hot bed is shortened.

5. A dedicated slow cooling collection platform is added to increase the collection temperature.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.

Fig. 1 is a schematic diagram of an existing steel rolling production line.

Fig. 2 is a schematic diagram of a steel rolling production line that can realize the requirements of controlled cooling after rolling of various alloy steel bars.

Figure 3 is a front view of the heated bed.

Fig. 4 is an enlarged view of the right half of Fig. 3 .

Fig. 5 is an enlarged view of the left half of Fig. 3 .

Figure 6 is a top view of the heated bed.

Fig. 7 is a schematic view of the input roller table.

Fig. 8 is a schematic diagram of the swing material receiving mechanism.

Fig. 9 is a schematic diagram of the unloading trolley.

Fig. 10 is a flow chart of the post-rolling treatment process of a steel rolling production line that can meet the requirements of controlled cooling after rolling of various alloy steel bars.

1. Rolling mill; 2. Water-cooled box; 3. Double-foot flying shear; 4. Hot bed; 5. Cooling bed; 6. The first saw; 7. The second saw; 8. The third saw; 9. The fourth saw; 10. The first collection station; 11. The second collection station; 12. Rolled pieces;

41. Input roller table; 42. Swing material receiving mechanism; 43. Fixed beam; 44. Traversing trolley; 45. Chain transmission mechanism; 46. Tensioning parts; 47. Output roller table; 48. Unloading trolley; 49. pushing mechanism;

421, bracket; 422, first rotating shaft; 423, driving mechanism;

481, unloading arm; 482, second rotating shaft; 483, power mechanism;

491, material pushing head; 492, transmission connecting rod; 493, driving hydraulic cylinder; 494, the third rotating shaft; 495, the fourth rotating shaft.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

A steel rolling production line that can realize the controlled cooling requirements after rolling of various alloy steel bars, including a rolling mill 1, a double-scale flying shear 3, a cooling bed 5, a first saw 6 and a second saw 7 connected in sequence, which can realize multiple The rolling production line required for controlled cooling after rolling of various alloy steel bars also includes a hot bed 4 for moving and cooling the rolled piece 12, and the temperature drop of the rolled piece 12 on the hot bed 4 is smaller than that of the rolled piece 12 on the cooling bed 5 Amplitude, the hot bed 4 contains input roller table 41, traverse trolley 44 and output roller table 47, the input roller table 41 of the heated bed 4 is located between the double ruler flying shear 3 and the input roller table of the cooling bed 5, the heating bed 4 The output roller table 47 is located between the first saw 6 and the second saw 7 , as shown in FIG. 2 .

Both the hot bed 4 and the cooling bed 5 can move and cool the rolled piece 12. The hot bed 4 is an improvement to the existing cooling bed. The hot bed 4 is made for the rolled piece 12 that needs high temperature and slow cooling. The hot bed 4 can make the same The cooling range of the rolled piece 12 on the hot bed 4 is smaller than that of the rolled piece 12 on the cooling bed 5, so it is called a hot bed. The temperature drop range of the rolled piece 12 on the hot bed 4 is no more than 150°C. Both the first saw 6 and the second saw 7 are cut-to-length saws.

In this embodiment, the steel rolling production line that can realize the controlled cooling requirements of various alloy steel bars after rolling also includes a water-cooled box 2, which is located between the rolling mill 1 and the double-scale flying shear 3, which can realize various alloy steel bars. The steel rolling production line required for controlled cooling after steel bar rolling also includes a third saw 8, a fourth saw 9, a first collection table 10, and a second collection table 11 arranged sequentially behind the second saw 7, and the rolled piece 12 is placed in the first The temperature drop range on the collecting platform 10 is smaller than that of the rolled piece 12 on the second collecting platform 11 . Except for the hot bed 4, other equipment can be existing equipment, and its specific structure will not be introduced in detail in order to save space.

In this embodiment, the outlet of rolling mill 1 is provided with 2 sections of water cooling box 2 (according to the requirements of cooling temperature, it can also be provided with 3 sections). The roller table corresponds to the steel that does not need to be cooled and passes directly through the empty roller table. The second collecting platform 11 can be set up 2～3 according to output requirement. The third saw 8 and the fourth saw 9 are also cut-to-length saws.

In this embodiment, the hot bed 4 also includes a swing receiving mechanism 42 capable of collecting the rolling stock 12 on the input roller table 41. The swing receiving mechanism 42 is located between the input roller table 41 and the traverse trolley 44. The feeding mechanism 42 contains a bracket 421 that can swing up and down. When the bracket 421 is at the lower limit position, the apron mechanism 9 pushes the rolled piece 10 of the input roller table 1 onto the bracket 21, and the bracket 421 can collect the The rolling piece 12 of the roller table 41; when the bracket 421 swings from the lower limit position to the upper limit position, the bracket 421 lifts the rolling piece 12, and the traverse trolley 44 traverses to the bottom of the bracket 421; when the bracket 421 moves from the upper limit position In the process of swinging from the limit position to the lower limit position, the rolled pieces 12 collected and placed on the bracket 421 can fall on the traverse trolley 44 , as shown in FIGS. 3 to 7 .

In this embodiment, the brackets 421 are arranged in the interval of the input roller table 41 in one-to-one correspondence, that is, the brackets 421 are arranged in the interval between two adjacent rollers of the input roller table 41 in a one-to-one correspondence, One end of the bracket 421 is connected and fixed with the first rotating shaft 422, and the other end of the bracket 421 is connected and fixed with the driving mechanism 423. The bracket 421 contains a first placement groove for collecting and placing the rolled pieces 12. When the bracket 421 When at the upper limit position, the lower end of the first placement slot is higher than the upper surface of the traverse trolley 44; when the bracket 421 is at the lower limit position, the upper end of the first placement slot is lower than the traverse trolley The position of the upper surface of 44 is shown in FIG. 8 .

In this embodiment, the rollers on the input roller table 41 are arranged obliquely, and the heated bed 4 also includes a pushing mechanism 49, which is used to push the rolling piece 12 on the input roller table 41 into the first stage of the bracket 421. In a placement slot, the pushing mechanism 49 is located between the swinging material receiving mechanism 42 and the input roller table 41 . Pushing mechanism 49 contains pushing head 491, transmission connecting rod 492 and drive hydraulic cylinder 493 connected in sequence, pushing head 491 can swing up and down with the third rotating shaft 494, and driving hydraulic cylinder 493 can drive transmission connecting rod 492 with the first The four rotating shafts 495 rotate back and forth, and when the pushing head 491 swings upwards, the rolled piece 12 on the input roller table 41 can be pushed into the bracket 421 . When the rolled piece 12 enters the cooling bed 5 after only passing through the input roller table 41 of the hot bed 4 (not transferred from the input roller table 41 of the hot bed 4 to the output roller table 47 through the traverse trolley 44), the bracket 421 is located at the upper limit position and form a V-shaped groove with the rollers on the input roller table 41, the rollers on the input roller table 41 are driven by a motor, and the pushing mechanism 49 does not work, so that the rolling piece 12 in the V-shaped groove can quickly pass through the input roller table 41 Then enter the cooling bed 5. When the pushing head 491 is located at the lower limit position, it will not block the passage of the rolled piece 12 in the V-shaped groove. When the pushing head 491 swings upwards, the rolled piece 12 in the V-shaped groove can be pushed into the first placement of the bracket 421. in the slot.

In this embodiment, the heated bed 4 also includes a fixed beam 43, the fixed beam 43 is located between the input roller table 41 and the output roller table 47, and the traverse trolley 44 is arranged on the fixed beam 43, and the traverse trolley 44 can move along the fixed beam. 43 move back and forth. The traversing trolley 44 is driven to move laterally by the chain transmission mechanism 45 , and a tension member 46 for tensioning the chains in the chain transmission mechanism 45 is provided below the fixed beam 43 .

In this embodiment, the hot bed device for quickly collecting the rolled alloy steel bars also includes a discharge trolley 48 capable of transferring the rolled piece 12 on the traverse trolley 44 to the output roller table 47 . The discharge trolley 48 contains a discharge arm 481, and the discharge trolley 48 also contains a power mechanism 483 for making the discharge arm 481 swing up and down with the second rotating shaft 482. When the discharge arm 481 swings from the lower limit position to the upper limit position During the process, the unloading trolley 48 can transfer the rolling piece 12 on the traversing trolley 44 to the unloading arm 481. When the unloading arm 481 swings from the upper limit position to the lower limit position, the unloading trolley 48 can Make the rolling piece 12 on the discharge arm 481 fall on the output roller table 47, as shown in 3 to FIG. 9 .

In this embodiment, the unloading arm 481 and the bracket 421 are all bar-shaped metal frames, and the unloading arm 481 contains a horizontal section and an inclined section connected in sequence. For the second placement groove of the component 12, when the unloading arm 481 is at the lower limit position, the horizontal section is in a horizontal state and the position of the lower surface of the second placement groove is lower than the position of the upper end surface of the output roller table 47; When the unloading arm 481 is at the upper limit position, the horizontal section is inclined upwards and the position of the lower end of the second placement groove is higher than the position of the upper surface of the unloading trolley 48 . The horizontal section of the discharge arm 481 is connected with the power mechanism 483, and the power mechanism 483 is a crank linkage mechanism, and the inclined section of the discharge arm 481 is connected with the second rotating shaft 482. The discharge direction of the parts 12 is the same, and the horizontal section of the discharge arm 481 faces the swing material receiving mechanism 42, that is, the horizontal section of the discharge arm 481 faces the right side in FIG. 9 .

The working principle of the hot bed 4 is: the rolled pieces 12 conveyed by the input roller table 41 slide down to the swing material receiving device 42 through the pusher mechanism 49; On the traversing dolly 44, now the traversing dolly 44 is positioned at the right side of Fig. 3; 3); the tension member 46 relies on gravity to tension the chain of the chain transmission mechanism 45; the traverse trolley 44 traverses the rolled piece 12 to the output end (at this time, the traverse trolley 44 is located on the left side of Fig. 3 ), the power mechanism 483 drives the unloading trolley 48 to rise, and after the rolling piece 12 on the traverse trolley 44 is lifted up, the traverse trolley 44 quickly traverses to the input end (returning to the right side of Fig. 3 ), the power mechanism 483 Then drive the unloading trolley 48 to descend, and the rolled piece 12 will fall on the output roller table 47; the output roller table 47 is driven by a motor, and the rolled piece 12 is quickly delivered to the sawing area of the hot bed rear area (such as the second saw 7 ), to achieve the technological requirements of high-temperature slow cooling and rapid collection of certain alloy steels after rolling.

The hot bed 4 is arranged in front of the conventional cooling bed, the overall size is 42m long, 10.5m wide, and 1m high, and the conventional cooling bed size at the rear is 90m long, 10.5m wide, and 1m high. The action cycle of the hot bed 4 is 180s, that is, the residence time of the rolled piece 12 on the hot bed 4 is 180s, which can meet the technological requirements of rapid traverse, high temperature and slow cooling.

The present invention is suitable for production Specifications of alloy steel; production steel mainly includes high-quality carbon structural steel, alloy structural steel, gear steel, bearing steel, free-cutting non-quenched and tempered steel, spring steel, etc.; requirements The hourly output of the following specifications reaches 130t/h, The hourly output of specifications and above reaches 160t/h; The high-temperature slow-cooling material with specifications above and above shall not be lower than 650°C and enter the slow-cooling pit; the low-temperature slow-cooling material shall not be lower than 450°C and enter the slow-cooling pit; the temperature of the lower cooling bed of conventional cooling materials shall not be higher than 450°C.

Introduce the production process route of the steel rolling production line that different steel grades use the present invention and can realize the controlled cooling requirement after rolling of various alloy steel bars, as shown in Figure 10:

1. When producing high-temperature slow-cooled materials, the rolled piece 12 is not water-cooled after leaving the rolling mill 1. It is transported to the double-size flying shear 3 through the empty roller table of the water-cooled box 2, and then divided into short double-size and then transported to the hot bed 4. On the input roller table 41, the rolling piece 12 slides to the traverse trolley 44 on the hot bed 4 after being braked, and the traverse trolley 44 is driven by a chain to transport the grouped rolled pieces to the output roller conveyor 47 of the heat bed 4 (such as Shown by arrow A in Fig. 2), enter the fixed-length sawing area; first saw the rolling piece into double or triple feet by the 2nd saw 7, then the 3rd saw 8 and 4 saw 9 work simultaneously, sawing into fixed length; the cut-length rolled pieces are transported to the first collection platform 10 for collection, and then manually bundled and then lifted to the slow cooling pit, the entire working cycle can guarantee The high-temperature slow-cooling material with specifications above and above shall not be lower than 650°C and enter the slow-cooling pit.

2. When producing low-temperature and slow-cooled materials, after the rolled piece 12 leaves the rolling mill 1, it is cooled by the water-cooled box 2 to the set surface temperature according to the requirements of the cooling control system, and is transported to the double-scale flying shear 3 to grow into multiple scales in sections, and then transported to On the input roller table of the cooling bed 5 (the rolled piece 12 only passes through the input roller table 41 of the hot bed 4 and is not transported by the traverse trolley 4 of the hot bed 4), the rolled piece 12 slides to the rack of the cooling bed 5 after being braked , the cooling bed 5 steps quickly according to the set action cycle, and the rolled pieces 12 are moved laterally to the row steel chain to form a group, and then transported to the output roller table of the cooling bed 5 (as shown by arrow B in Figure 2) , enter the fixed-length sawing area; first saw the rolled piece into three times or four times by the first saw 6, and then (after passing through the output roller table 47 of the hot bed 4) be cut into two pieces by the second saw 7 Double the length, finally the third saw 8 and the fourth saw 9 work at the same time, sawing and cutting into fixed length; the cut-to-length rolled piece is transported to the first collection platform 10 for collection, manually bundled and then lifted to the slow cooling pit, the whole The working cycle can ensure that the low-temperature slow-cooling material enters the slow-cooling pit at no lower than 450°C.

3. When producing conventional cooling materials, the rolled piece 12 is not water-cooled after it exits the rolling mill 1, and is transported to the double-foot flying shear 3 through the empty roller table of the water-cooled box 2, and then grows into multiple feet in sections, and then transported to the input of the cooling bed 5 On the roller table (the rolling piece 12 only passes through the input roller table 41 of the hot bed 4 and is not transported by the traverse trolley 4 of the hot bed 4), the rolling piece 12 slides to the rack of the cooling bed 5 after being braked, and the cooling bed 5 follows the The set action cycle is slowly stepped, and the rolled pieces 12 are moved laterally to the steel chains to form a group, and then transported to the output roller table of the cooling bed 5 (as shown by the arrow B in Figure 2), and enter the cut-to-length Sawing area; first saw the rolling piece by the first saw 6 and cut it into three times or four times of feet, then (after passing through the output roller table 47 of the hot bed 4) be cut into double feet by the second saw 7, and finally The 3rd saw 8 and the 4th saw 9 work at the same time, sawing and cutting to length; the cut-to-length rolling piece is transported to the second collection platform 11 for collection, and then automatically bundled and then hoisted to the finished product warehouse for storage. The entire working cycle can be guaranteed The hourly output of the following specifications reaches 130t/h, The hourly output of specifications and above reaches 160t/h;

The above is only a specific embodiment of the present invention, and cannot limit the scope of the invention, so the replacement of its equivalent components, or the equivalent changes and modifications made according to the patent protection scope of the present invention, should still fall within the scope of this patent. category. In addition, the technical features and technical features, technical features and technical solutions, and technical solutions and technical solutions in the present invention can be used in free combination.

Claims (10)

1. a kind of steel rolling production-line that can achieve multiple alloy steel bar cooling control after rolling requirements is it is characterised in that this is achievable many Milling train (1) that the steel rolling production-line that kind of alloy steel bar cooling control after rolling requires includes being sequentially connected, Double Dimension Flying Shears (3), cold bed (5), the first saw (6) and the second saw (7), this can achieve that the steel rolling production-line that multiple alloy steel bar cooling control after rolling require also includes Hott bed (4) that is mobile for rolled piece (12) and cooling down, cooling extent on hott bed (4) for the rolled piece (12) is less than rolled piece (12) cold Cooling extent on bed (5), hott bed (4) contains approach table (41), cross traveling trolley (44) and runout table (47), hott bed (4) Approach table (41) be located between Double Dimension Flying Shears (3) and the approach table of cold bed (5), runout table (47) position of hott bed (4) Between the first saw (6) and the second saw (7).

2. the steel rolling production-line that can achieve that multiple alloy steel bar cooling control after rolling require according to claim 1, its feature It is, this can achieve that the steel rolling production-line that multiple alloy steel bar cooling control after rolling require also includes water cooling box (2), water cooling box (2) Between milling train (1) and Double Dimension Flying Shears (3), this can achieve the steel rolling production-line of multiple alloy steel bar cooling control after rolling requirements also Including being successively set on the 3rd saw (8) after the second saw (7), the 4th saw (9), the first collection table (10) and the second collection table (11), rolled piece (12) is less than cooling in the second collection table (11) for the rolled piece (12) in the cooling extent in the first collection table (10) Amplitude.

3. the steel rolling production-line that can achieve that multiple alloy steel bar cooling control after rolling require according to claim 1, its feature It is, hott bed (4) also contains the swing material receiving mechanism (42) that can collect the rolled piece (12) in approach table (41), and swing connects Material mechanism (42) is located between approach table (41) and cross traveling trolley (44), swings material receiving mechanism (42) and contains and can swing up and down Bracket (421), when bracket (421) be located at lower limit position when, bracket (421) can be collected and come from approach table (41) Rolled piece (12)；When bracket (421) is rocked to upper extreme position by this lower limit position, cross traveling trolley (44) traversing to bracket (421) below；During bracket (421) is rocked to this lower limit position by this upper extreme position, bracket (421) is upper to be collected The rolled piece (12) put can fall on cross traveling trolley (44).

4. the steel rolling production-line that can achieve that multiple alloy steel bar cooling control after rolling require according to claim 3, its feature It is, bracket (421) is arranged in the interval of approach table (41) correspondingly, one end of bracket (421) and first rotating shaft (422) it is connected, the other end of bracket (421) is connected with drive mechanism (423), bracket (421) is upper to be contained for receiving Collection is put the first of rolled piece (12) and is put groove, when bracket (421) is located at upper extreme position, this first lower end position putting groove Position higher than cross traveling trolley (44) upper surface；When bracket (421) is located at lower limit position, this first upper end position putting groove Set low in the position of cross traveling trolley (44) upper surface.

5. the steel rolling production-line that can achieve that multiple alloy steel bar cooling control after rolling require according to claim 3, its feature It is, the roller in approach table (41) is obliquely installed, hott bed (4) also contains pusher (49), this pusher (49) is used On the bracket (421) that the rolled piece (12) in approach table (41) is pushed swing material receiving mechanism (42), pusher (49) position Between swing material receiving mechanism (42) and approach table (41).

6. the steel rolling production-line that can achieve that multiple alloy steel bar cooling control after rolling require according to claim 5, its feature It is, pusher (49) contains pushing head (491), kinematic link (492) and the driving hydraulic cylinder (493) being sequentially connected, and pushes away Stub bar (491) can be swung up and down with the 3rd rotating shaft (494) for axle, and driving hydraulic cylinder (493) can drive kinematic link (492) With the 4th rotating shaft (495) reciprocating rotation, can be by the rolled piece (12) in approach table (41) when pushing head (491) is swung up Push on bracket (421).

7. the steel rolling production-line that can achieve that multiple alloy steel bar cooling control after rolling require according to claim 3, its feature It is, the hott bed device that rear alloy steel bar is rolled in this quick collection also contains and can turn the rolled piece (12) on cross traveling trolley (44) Move to the dump car (48) on runout table (47).

8. the steel rolling production-line that can achieve that multiple alloy steel bar cooling control after rolling require according to claim 7, its feature It is, dump car (48) contains unloading arm (481), dump car (48) also contains and is used for making unloading arm (481) with second turn The actuating unit (483) that axle (482) swings up and down for axle, when unloading arm (481) is rocked to upper extreme position by lower limit position During, the rolled piece (12) on cross traveling trolley (44) can be promoted on unloading arm (481) for dump car (48), works as discharging During arm (481) is rocked to lower limit position by upper extreme position, dump car (48) can make on unloading arm (481) Rolled piece (12) falls on runout table (47).

9. the steel rolling production-line that can achieve that multiple alloy steel bar cooling control after rolling require according to claim 8, its feature It is, unloading arm (481) contains the horizontal segment being sequentially connected and tilting section, the horizontal segment of unloading arm (481) is provided with for receiving Collection is put the second of rolled piece (12) and is put groove, and when unloading arm (481) is located at lower limit position, this horizontal segment is the level of state, The position of this second lower surface putting groove is less than the position of runout table (47) upper surface；When unloading arm (481) is located at upper pole During extreme position, this horizontal segment is inclined upwardly, and the position of this second lower end putting groove is higher than the position of dump car (48) upper surface Put.

10. the steel rolling production-line that can achieve that multiple alloy steel bar cooling control after rolling require according to claim 9, its feature It is, the horizontal segment of unloading arm (481) is connected with actuating unit (483), the tilting section of unloading arm (481) and the second rotating shaft (482) connect, the axis direction of the second rotating shaft (482) is identical with the discharging direction of the upper rolled piece (12) of runout table (47), discharging The horizontal segment of arm (481) is towards swing material receiving mechanism (42).