Double-line segmentation temperature equalizing device

Abstract

The utility model discloses a double-line segmentation temperature equalizing device which comprises two temperature equalizing guide grooves, a first temperature control water tank is arranged on the temperature equalizing guide grooves, and the distance between the front end of the first temperature control water tank and the inlet ends of the temperature equalizing guide grooves is not smaller than the minimum transmission distance required for restoring the temperature inside and outside a rolled piece to be consistent; the distances between the outlet ends of the two uniform-temperature guide grooves and the tail end of the first temperature control water tank are equal; by means of the device, the quality of cut rolled piece finished products can be consistent.

Description

Technical Field

[0001] The utility model relates to metal rolling, in particular to a double-wire cutting and temperature equalizing device. Background Art

[0002] At present, in the field of multi-line slitting bar processing, when the rolled piece is slit, the center temperature of the rolled piece will be higher than the edge temperature, resulting in unequal sizes of the finished rolled piece after slitting, and there is a large line difference. The maximum length difference is more than 500mm. Due to the high line difference, on the one hand, it is difficult to set the shearing parameters of the double-length shear, which will cause material cutting waste and affect the yield rate. On the other hand, due to the temperature difference of the rolled piece itself after slitting, it is more difficult to control the rolling and cooling of the rolled piece, resulting in uneven quality of the finished product and the mechanical properties of the finished rolled piece are prone to be inconsistent.

[0003] The Chinese invention patent with publication number CN111215446B discloses a double-line high-speed bar production line, which includes a heating furnace, a high-pressure water dephosphorization device, a roughing mill, an intermediate rolling mill, a pre-finishing mill, a finishing mill and a cooling bed. A plurality of pre-finishing controlled cooling water tanks are fixed between the two finishing mills. The pre-finishing controlled cooling water tanks are provided with three bar inlets and three bar outlets. A first guide device and a free looper are respectively installed between the end controlled cooling water tank and the two finishing mills. The arc-shaped part of the rear end of the first guide device passes through the free looper and then passes through the corresponding finishing mill to extend toward the cooling bed. A second guide device is provided between the end controlled cooling water tank and the cooling bed. The second guide device is on the same straight line as the pre-finishing mill and the controlled cooling water tank. The production line provided by the invention saves space, has a short rolling line, is smooth in production, has high production efficiency, can realize rolling in multiple ways and ensures product quality.

[0004] The above-mentioned production line is equipped with a first guide device behind the controlled cooling water tank after pre-finishing rolling to realize double-line rolling, but the first guide device only realizes the guiding function. There is a certain temperature difference in the rolled piece after cutting, which makes its elongation different and affects the subsequent rolling effect. The first guide device cannot control the temperature of the rolled piece after cutting separately to eliminate the temperature difference of the rolled piece after cutting, resulting in different quality of the final product. Summary of the invention

[0005] Purpose of the utility model: The purpose of the utility model is to provide a double-wire slitting and temperature-averaging device which can ensure the quality of the finished rolled pieces after slitting is consistent.

[0006] Technical solution: The double-wire cutting temperature-averaging device described in the utility model comprises two temperature-averaging guide grooves, on which a first temperature-control water tank is provided. The distance between the front end of the first temperature-control water tank and the inlet end of the temperature-averaging guide groove is not less than the minimum transmission distance required for the internal and external temperatures of the rolled piece to be restored to be consistent; the outlet ends of the two temperature-averaging guide grooves are equidistant from the end of the first temperature-control water tank.

[0007] Based on the above technical solution, when the rolled piece after splitting passes through the temperature equalizing guide groove, the temperature thereof will be adjusted by the first temperature control water tank on the temperature equalizing guide groove so that the temperature of the rolled piece entering the modular rolling mill can be kept consistent, thereby keeping its elongation rate consistent, and finally a finished product with uniform quality can be obtained.

[0008] Preferably, the two temperature equalizing guide grooves are symmetrically arranged on both sides of the main transmission line of the rolled piece.

[0009] Through the above setting, as long as the first temperature control water tank in the temperature equalizing guide groove row with the longest required transmission distance for restoring the internal and external temperatures of the rolled piece is set first, and the other temperature control water tank is symmetrically arranged on the other temperature equalizing guide groove along the main transmission line, there is no need to measure the distance between the first temperature control water tank and the outlet end, which is convenient for installation and setting.

[0010] Preferably, a horizontal loop is provided on the temperature equalizing guide groove.

[0011] Setting the horizontal loop can achieve tension-free rolling and avoid the occurrence of steel piling accidents.

[0012] Preferably, the horizontal loop is arranged in front of the first temperature control water tank.

[0013] By arranging the horizontal loop in front of the first temperature control water tank, the rolled piece will not be affected by the horizontal loop after being temperature-controlled by the first temperature control water tank, which better ensures that no new temperature difference will be generated in the rolled piece.

[0014] Preferably, the horizontal loops on the two temperature equalizing guide grooves are arranged at the same position behind the first temperature control water tank.

[0015] When the horizontal loop is arranged behind the first temperature control water tank, setting the positions to be the same can ensure that the horizontal loops on the two temperature equalizing guide grooves have the same influence on the rolled piece, and avoid affecting the temperature control effect of the first temperature control water tank due to the horizontal loop.

[0016] Preferably, a pre-sequence rolling device is connected in front of the temperature equalizing guide groove, and a second temperature control water tank is connected between the temperature equalizing guide groove and the pre-sequence rolling device.

[0017] Setting the second temperature control water tank can preliminarily cool the split rolled piece and reduce the cooling pressure of the third temperature control water tank.

[0018] Preferably, a post-sequence rolling device is connected behind the temperature equalizing guide groove, and a first flying shear is connected between the temperature equalizing guide groove and the post-sequence rolling device.

[0019] Beneficial effects: Compared with the prior art, the beneficial effects of the present utility model are as follows: The temperature of the split rolled piece can be kept consistent through the first temperature control water tank on the temperature equalizing guide groove, thereby making the quality of the final finished product consistent. Description of the Drawings

[0020] Figure 1 It is the overall schematic diagram of this production line;

[0021] Figure 2 is Figure 1 the enlarged schematic diagram at position A in

[0022] Figure 3 is Figure 1 the enlarged schematic diagram at position B in. Specific implementation manner

[0023] As shown in the figure, the double-line splitting and temperature equalizing device provided by the present utility model includes two temperature equalizing guide grooves 1. In front of the temperature equalizing guide grooves 1, a heating furnace 6 and a pre-sequence rolling assembly are sequentially arranged from front to back, and a post-sequence rolling assembly is arranged behind the temperature equalizing guide grooves 1.

[0024] The pre-sequence rolling assembly includes a rough and medium rolling mill set 7, a second flying shear 8, a pre-finishing rolling mill set 9, a third temperature control water tank 10, a third flying shear 11, and a finishing rolling mill set 12, which are sequentially arranged from front to back. The rolled piece coming out of the heating furnace 6 passes through each component in the pre-sequence rolling assembly along the main transmission line for rolling, and finally is split into two parts by the finishing rolling mill set 12.

[0025] In this embodiment, the rough and medium rolling mill set 7 includes 6 rolling mills alternately arranged in horizontal and vertical directions, the pre-finishing rolling mill set 9 includes 6 rolling mills alternately arranged in horizontal and vertical directions, and the finishing rolling mill set 12 includes a horizontal rolling mill, a vertical rolling mill, and 2 horizontal rolling mills arranged in sequence.

[0026] A second temperature control water tank 4 is arranged behind the finishing rolling mill set 12. The second temperature control water tank 4 is provided with two rolled piece channels. After the rolled piece is split by the finishing rolling mill set 12, it respectively enters the two rolled piece channels of the second temperature control water tank 4. The second temperature control water tank 4 may not be provided either.

[0027] The two rolled piece channels of the second temperature control water tank 4 are respectively connected to the inlet end of a temperature equalizing guide groove 1, and the outlet end of the temperature equalizing guide groove 1 is connected to the post-sequence rolling assembly.

[0028] The temperature equalizing guide groove 1 can reversely transport the rolled piece by a set distance and then forwardly transport it to the post-sequence rolling assembly. Specifically, the temperature equalizing guide groove 1 includes an inlet end and an outlet end arranged alternately, as well as a first arc segment and a second arc segment. The inlet end is sequentially connected to the first arc segment, the second arc segment, and the outlet end; the length of the connecting segment between the first arc segment and the second arc segment can be set according to actual needs.

[0029] The inlet end of the temperature equalizing guide groove 1 is also connected to the finishing rolling mill set 12, and the outlet end is also connected to the post-sequence rolling assembly; the rolled piece enters the temperature equalizing guide groove 1 from the inlet end, turns after passing through the first arc segment and is reversely transported by a set distance, then turns after passing through the second arc segment and is forwardly transported to the outlet end, and then enters the post-sequence rolling assembly.

[0030] By setting the temperature equalizing guide groove 1, the rolled piece has a longer temperature equalizing transmission distance within the same length range, saving the overall length of the production line.

[0031] Figure 2 The temperature equalizing guide groove 1 appears as a complete ring. Actually, there is an overlapping intersection at the junction with the main transmission line of the rolled piece. The overlapping part is the inlet end and the outlet end.

[0032] The first temperature control water tank 2 is provided on the temperature equalizing guide groove 1. The distances from the first temperature control water tanks 2 on the two temperature equalizing guide grooves 1 to their outlet ends should be equal. In this way, the subsequent transmission distances of the rolled pieces after the temperature difference is eliminated by the first temperature control water tank 2 are also equal, which can avoid generating a new temperature difference due to different transmission distances. The distance from the first temperature control water tank 2 to the inlet end of the temperature equalizing guide groove 1 is not less than the minimum distance required for the internal and external temperatures of the rolled piece to recover to be the same. Because after the rolled piece passes through the second temperature control water tank 8, or if the second temperature control water tank 8 is not provided, after passing through the third temperature control water tank 10, its surface temperature is lower than the internal temperature, and it takes a period of time for the surface temperature to be the same as the internal temperature. Only at this time is the measured temperature of the rolled piece accurate. Only by adjusting the temperature of the rolled pieces in the two temperature equalizing guide grooves 1 by the first temperature control water tank 2 based on this temperature can the temperature difference between the two be accurately eliminated.

[0033] The two temperature equalizing guide grooves 1 can be symmetrically arranged along the main transmission line of the rolled piece, and their shapes and sizes are exactly the same; they can also be asymmetrically arranged. When using an asymmetric arrangement, the setting position of the first temperature control water tank 2 should also meet the above conditions. Specifically, the distances from the inlet ends of the temperature equalizing guide grooves 1 to the front ends of the first temperature control water tanks 2 can be different lengths, as long as they are not less than the minimum distance required for the internal and external temperatures of the rolled piece to be the same. Then, the diameter and the angle of the first arc section can be adjusted to control the distances from the ends of the first temperature control water tanks 2 to the outlet ends of the temperature equalizing guide grooves 1 to be the same.

[0034] A horizontal loop 3 can also be provided on the second arc section of the temperature equalizing guide groove 1 to achieve tension-free rolling and avoid steel piling accidents; the first temperature control water tank 1 can be set in front of the horizontal loop 3 or behind it. The specific setting position depends on the minimum distance required for the internal and external temperatures of the rolled piece to recover to be the same; the horizontal loop 3 can also be set at other positions according to actual needs.

[0035] It should be noted that when the horizontal loop 3 is arranged in front of the first temperature-controlled water tank 2, there is no special restriction on the distance between the two, because no matter what influence the horizontal loop 3 has on the temperature of the rolled piece, the subsequent first temperature-controlled water tank 2 will adjust the temperature of the rolled piece to eliminate the temperature difference of the rolled piece on the two equalizing guide grooves 1. If the horizontal loop 3 is arranged behind the first temperature-controlled water tank 2, the distances between the horizontal loop 3 and the first temperature-controlled water tank 2 on the two equalizing guide grooves 1 should be made equal, so as to avoid different influences on the temperature of the rolled piece due to different distances of the horizontal loop 3, which may affect the temperature control effect of the first temperature-controlled water tank 2.

[0036] The subsequent rolling assembly includes a modular rolling mill set 13 and a cooling bed 15 arranged in sequence; a first flying shear 5 can also be arranged between the equalizing guide groove 1 and the modular rolling mill set 13 to shear the head of the rolled piece to ensure that the rolled piece can be better bitten by the modular rolling mill set 13; a fourth temperature-controlled water tank 14 can also be arranged between the modular rolling mill set 13 and the cooling bed 7 to accelerate the cooling of the rolled piece.

[0037] The modular rolling mill set 13 includes two modular rolling mills arranged in sequence.

Claims

1. A double-line splitting temperature equalizing device, comprising two temperature equalizing guide grooves (1), characterized in that: A first temperature control water tank (2) is provided on the temperature equalizing guide groove (1). The distance between the front end of the first temperature control water tank (2) and the inlet end of the temperature equalizing guide groove (1) is not less than the minimum transmission distance required for the internal and external temperatures of the rolled piece to recover to be consistent; the distances between the outlet ends of the two temperature equalizing guide grooves (1) and the end of the first temperature control water tank (2) are equal; the two temperature equalizing guide grooves (1) are symmetrically arranged on both sides of the main transmission line of the rolled piece, and a horizontal loop (3) is provided on the temperature equalizing guide groove (1).

2. The double-line slicing and temperature equalizing device according to claim 1, wherein: The horizontal loop (3) is arranged in front of the first temperature control water tank (2).

3. The double-line splitting and temperature equalizing device according to claim 1, wherein: The horizontal loops (3) on the two temperature equalizing guide grooves (1) are arranged at the same position behind the first temperature control water tank (2).

4. A double-line splitting and temperature equalizing device according to claim 1, characterized in that: A previous rolling device is connected in front of the temperature equalizing guide groove (1), and a second temperature control water tank (4) is connected between the temperature equalizing guide groove (1) and the previous rolling device.

5. A double-line splitting and temperature equalizing device according to claim 1, characterized in that: A subsequent rolling device is connected behind the temperature equalizing guide groove (1), and a first flying shear (5) is connected between the temperature equalizing guide groove (1) and the subsequent rolling device.

Images