Strip processing production line with a secondary rolling process and strip processing method

Abstract

The present invention relates to a strip processing production line including a secondary rolling process, comprising an uncoiling section, a first annealing and pickling section and a first product collecting section which are sequentially connected and arranged along the running direction of the strip, and also comprising a rolling mill, a second annealing and pickling section, a plate type finishing section and a second product collecting section which are sequentially connected and arranged along the running direction of the strip, and the first product collecting section and the rolling mill are connected through a strip transfer structure. In addition, it also relates to a strip processing method based on the strip processing production line. The present invention arranges the first annealing and pickling section, the first product collecting section, the rolling mill, the second annealing and pickling section, the plate type finishing section and the second product collecting section together to form a continuous production unit, which can meet the continuous processing of hot-rolled stainless steel coils, cold-hardened stainless steel coils, hot-rolled titanium coils and cold-hardened titanium coils, etc., saves the transportation of steel coils between processes, improves the yield rate, and greatly saves factory construction land and engineering investment.

Description

Technical Field

[0001] The present invention relates to a strip processing production line including a secondary rolling process and a strip processing method based on the strip processing production line. Background Art

[0002] Stainless steel pickling, rolling, annealing, and surface finishing are all mature production processes, and the production of titanium coils has gradually emerged in recent years. In terms of current demand, the demand and output of stainless steel are high, while the demand and output of titanium are low, but there is an increasing trend year by year. The strip production process of stainless steel is relatively mature, while the strip production process of titanium is relatively backward, mainly because of the low output. Most factories produce in the form of plates. However, with the growth of demand, continuous units that save costs and improve efficiency are a trend for future titanium production. Summary of the Invention

[0003] The present invention relates to a strip processing production line including a secondary rolling process and a strip processing method based on the strip processing production line, which can at least solve some defects of the prior art.

[0004] The present invention relates to a strip processing production line including a secondary rolling process, which comprises an uncoiling section, a first annealing and pickling section, and a first product collecting section arranged in sequence along the running direction of the strip. It further comprises a rolling mill, a second annealing and pickling section, a shape finishing section, and a second product collecting section arranged in sequence along the running direction of the strip. The first product collecting section and the rolling mill are connected through a strip transfer structure.

[0005] As one of the embodiments, the second annealing and pickling section includes an argon-protected rapid heating annealing furnace and a light pickling unit. The argon-protected rapid annealing furnace adopts an electric resistance furnace or an induction heating furnace.

[0006] As one of the embodiments, the light pickling unit includes a neutral salt electrolysis section and a mixed acid pickling section.

[0007] As one of the embodiments, the rolling mill adopts an online 18-high rolling mill or a small roll diameter 6-high tandem rolling mill.

[0008] As one of the embodiments, the first product collecting section includes a first coiler and a first sheet collecting device, and the first coiler and the first sheet collecting device are connected through a transition guide plate; and / or, the second product collecting section includes a second coiler and a second sheet collecting device, and the second coiler and the second sheet collecting device are connected through a transition guide plate.

[0009] As one of the embodiments, the uncoiling section includes a double uncoiler and a welder, and both uncoilers are connected to the welder.

[0010] The present invention also relates to a strip processing method, which is based on the above-mentioned strip processing production line with secondary rolling process, wherein:

[0011] When processing hot-rolled strips, the strip raw materials are processed in the uncoiling section and the first annealing and pickling section in sequence, and the obtained products are collected by the first product collection section;

[0012] When processing cold-rolled strip or strip that needs to be thinned, the strip raw material is processed in sequence by the uncoiling section, the first annealing and pickling section, the rolling mill, the second annealing and pickling section, and the plate finishing section, and the obtained product is collected by the second product collection section.

[0013] As one of the implementation modes, the strip material is stainless steel or titanium.

[0014] As one of the implementation modes, the products collected by the first product collecting section and the second product collecting section are coils or plates.

[0015] As one of the embodiments, the second annealing and pickling section includes an argon-protected rapid heating annealing furnace and a light pickling unit, wherein the argon-protected rapid annealing furnace adopts a resistance furnace or an induction heating furnace; the light pickling unit includes a neutral salt electrolysis section and a mixed acid pickling section, wherein the mixed acid pickling section adopts a mixed pickling solution of HF and HNO3.

[0016] The present invention has at least the following beneficial effects:

[0017] The present invention jointly arranges the first annealing and pickling section, the first product collecting section, the rolling mill, the second annealing and pickling section, the plate finishing section and the second product collecting section to form a continuous production unit, which can meet the continuous processing of hot-rolled stainless steel coils, chilled stainless steel coils, hot-rolled titanium coils and chilled titanium coils and other strips, directly produce stainless steel and titanium coils or plate products, save the transportation of steel coils between processes, improve the yield rate, and greatly save factory construction land and engineering investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the composition of a strip processing production line provided by an embodiment of the present invention;

[0020] Figure 2 The equipment structure diagram of the strip steel cutting station provided in the third embodiment of the present invention;

[0021] Figure 3 Schematic structural view of the strip conveying device provided in the third embodiment of the present invention;

[0022] Figure 4 Plan view of the strip conveying device provided in the third embodiment of the present invention;

[0023] Figure 5 Schematic structural view of the strip pressing mechanism provided in the third embodiment of the present invention;

[0024] Figure 6 Schematic layout view of the guide plate on the pressing frame provided in the third embodiment of the present invention;

[0025] Figure 7 is Figure 6 side view. Specific embodiments

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1

[0028] As Figure 1 , the embodiment of the present invention provides a strip processing production line with a secondary rolling process, including an uncoiling section, a first annealing and pickling section, and a first product collection section that are sequentially connected and arranged along the running direction of the strip, and further including a rolling mill 14, a second annealing and pickling section, a plate shape finishing section, and a second product collection section that are sequentially connected and arranged along the running direction of the strip. The first product collection section and the rolling mill 14 are connected through a strip transfer structure 13.

[0029] In one embodiment, as Figure 1 , the above uncoiling section adopts a double-uncoiling method, which can effectively save the coil changing time at the entrance. Specifically, the uncoiling section includes a double-uncoiler and a welding machine 3. The double-uncoiler includes a first uncoiler 1 and a second uncoiler 2, and both uncoilers are connected to the welding machine 3; among them, the welding machine 3 is used to weld the tail of the previous strip to the head of the next strip to achieve continuous production. The welding machine 3 can adopt welding equipment such as a laser welding machine 3 and a laser hybrid welding machine 3 that can directly roll the weld seam. Preferably, both uncoilers have the ability to uncoil strip coils with a strip thickness of 1 to 12 mm.

[0030] The above-mentioned first annealing and pickling section includes a front annealing furnace 5 and a front pickling unit 8. Among them, the front annealing furnace 5 is preferably a resistance furnace or an induction heating furnace, which can achieve rapid heating of the strip and ensure the annealing effect.

[0031] In one embodiment, the front pickling unit 8 adopts a pickling process of sulfuric acid pickling + mixed acid pickling; among them, the sulfuric acid pickling section can adopt 1 to 4 sections of sulfuric acid pickling tanks, and the number of sulfuric acid pickling tanks can be increased or decreased specifically according to requirements such as the process speed of the strip. Each group of sulfuric acid pickling tanks is preferably equipped with a sulfuric acid pickling solution circulation mechanism separately. Further, along the running direction of the strip, the concentration of the sulfuric acid pickling solution in each sulfuric acid pickling tank decreases in turn; the mixed acid pickling preferably uses a mixed pickling solution of HF and HNO3, and 2 to 4 sections of mixed acid pickling tanks can be adopted. Each group of mixed acid pickling tanks is preferably equipped with a mixed acid pickling solution circulation mechanism separately. Further, along the running direction of the strip, the concentration of the mixed acid pickling solution in each mixed acid pickling tank decreases in turn.

[0032] Further, as Figure 1 shown, a first loop 4 is provided between the front annealing furnace 5 and the uncoiling section, which can coordinate the production pace between the uncoiling section and the first annealing and pickling section. The first loop 4 is preferably in a full loop state during normal production. Under conditions such as the welding operation of the welder 3, the first loop 4 can release the loop to ensure the smooth progress of production.

[0033] Further, as Figure 1 shown, a second loop 9 is provided between the front pickling unit 8 and the first product collection section, which can coordinate the production pace between the first annealing and pickling section and the downstream section. Specifically, through the buffering function of the second loop 9, it can ensure the normal operation of the first annealing and pickling section when the rolls of the rolling mill 14 are changed, and ensure the normal operation of the first annealing and pickling section when the first product collection section is collecting products.

[0034] Further, as Figure 1 shown, a surface treatment mechanism is also arranged between the front annealing furnace 5 and the front pickling unit 8. Preferably, the surface treatment mechanism includes a shot blasting machine 6 and a surface rebrushing device 7. Among them: the shot blasting machine 6 can be configured with different numbers of shot chambers according to different speeds of the unit. The higher the speed, the more shot chambers. In this embodiment, a shot blasting machine 6 with 1 to 3 shot chambers is adopted; the surface rebrushing device 7 uses hard bristles to grind and brush the surface of the strip with scale, removing part of the scale and being more conducive to improving the pickling efficiency.

[0035] In one embodiment, the above-mentioned rolling mill 14 adopts an online 18-high rolling mill 14 or a 6-high tandem rolling mill 14 with small roll diameters. Preferably, it adopts a multi-stand structure and can be set to have no less than 3 stands according to the needs of raw materials and product specifications; the total reduction ratio of the above-mentioned rolling mill 14 is preferably controlled at 20% to 85%. Further preferably, as Figure 1, a cleaning section 15 is arranged on the outlet side of the rolling mill 14, which can remove the emulsion or rolling oil remaining on the strip surface during the rolling process, and can improve the surface quality of the final product. The cleaning section 15 can use alkaline solution cleaning or high-pressure hot water rinsing.

[0036] In one embodiment, the second annealing and pickling section includes an argon-protected rapid heating annealing furnace 17 and a light pickling unit 18. The argon-protected rapid annealing furnace uses an electric resistance furnace or an induction heating furnace, and is protected by argon gas, which can realize the rapid heating of the strip and ensure the annealing effect and production efficiency; wherein, the furnace temperature of the argon-protected rapid annealing furnace is preferably controlled at 1100-1250 °C.

[0037] After the strip is processed by the argon-protected rapid heating annealing furnace 17, there will be a thin oxide film on the strip surface. The above light pickling unit 18 can remove the oxide film and improve the surface quality of the product. Preferably, the light pickling unit 18 includes a neutral salt electrolysis section and a mixed acid pickling section, which can be applied to the treatment of stainless steel and titanium materials, and control the surface state of the strip by controlling parameters such as current, acid concentration and temperature. Preferably, the mixed acid pickling section uses a mixed acid pickling solution of HF and HNO3. Further, HF ≤ 20 g / l and HNO3 ≤ 100 g / l.

[0038] Further, as Figure 1 , a third loop 16 is provided between the rolling mill 14 and the argon-protected rapid heating annealing furnace 17, which can coordinate the production pace between the rolling mill 14 and the second annealing and pickling section, and can ensure the normal operation of the second annealing and pickling section when the rolling mill 14 changes rolls.

[0039] Further, as Figure 1 , a fourth loop 19 is provided between the light pickling unit 18 and the plate shape finishing section, which can coordinate the production pace between the second annealing and pickling section and the downstream section.

[0040] In one embodiment, the above plate shape finishing section includes a temper mill 20 and a tension leveling machine 21, which can perform plate shape and surface treatment on the strip to improve the quality of the strip product. For example, the surface of the stainless steel strip can meet the 2B / 2D surface delivery requirements, and the surface of the titanium strip can meet the roughness requirements required by the customer, etc.

[0041] The strip processing production line provided by this embodiment can be used for the processing of stainless steel strips and can also be used for the processing of titanium strips; it can obtain coils or sheets. Correspondingly:

[0042] As Figure 1, the first product collection section includes a first coiler 10 and a first plate collection device 12, and the first coiler 10 and the first plate collection device 12 are connected by a first transition guide plate 11; and / or, the second product collection section includes a second coiler 22 and a second plate collection device 24, and the second coiler 22 and the second plate collection device 24 are connected by a second transition guide plate 23. Wherein, when the target product is a plate, the strip needs to be cut into plates, therefore, the first product collection section also includes a strip cutting device, which can be arranged at the entrance side of the first product collection section, for example, arranged at the incoming material side of the first coiler 10, or arranged between the first coiler 10 and the first plate collection device 12; the second product collection section can also be equipped with a strip cutting device, and the specific arrangement structure is not repeated here. The first plate collection device 12 and the second plate collection device 24 can adopt a plate stacker, etc.

[0043] In addition, the strip transfer structure 13 between the first product collection section and the rolling mill 14 may also use a transition guide plate.

[0044] Based on the above strip processing production line, it can meet the processing of stainless steel or titanium materials. The raw material coil can be hot-rolled black coil stainless steel or cold-hardened stainless steel or hot-rolled titanium coil, etc. The strip thickness specification can be 1mm to 12mm. The strip processing production line has two main production processes:

[0045] After the strip raw material is processed in the uncoiling section and the first annealing and pickling section in sequence, the obtained product is collected by the first product collecting section;

[0046] The strip raw material is processed in sequence by the uncoiling section, the first annealing and pickling section, the rolling mill 14, the second annealing and pickling section, and the plate finishing section, and the obtained product is collected by the second product collecting section.

[0047] The strip processing production line provided in this embodiment forms a continuous production unit by jointly arranging the first annealing and pickling section, the first product collecting section, the rolling mill 14, the second annealing and pickling section, the plate finishing section and the second product collecting section. It can meet the continuous processing of hot-rolled stainless steel coils, chilled stainless steel coils, hot-rolled titanium coils and chilled titanium coils, and directly produce stainless steel and titanium coils or plate products, eliminating the transportation of steel coils between processes, improving the yield rate, and greatly saving factory construction land and engineering investment.

[0048] Embodiment 2

[0049] like Figure 1 The embodiment of the present invention provides a strip processing method, which is based on the strip processing production line with secondary rolling process provided in the above embodiment 1, wherein:

[0050] When processing hot-rolled strip, after the strip raw material is successively processed through the uncoiling section and the first annealing and pickling section, the obtained product is collected by the first product collection section;

[0051] When processing cold-rolled strip or when the strip needs to be thinned, the strip raw material is successively processed through the uncoiling section, the first annealing and pickling section, the rolling mill 14, the second annealing and pickling section, and the plate shape finishing section, and the obtained product is collected by the second product collection section.

[0052] The relevant content of this strip processing method has been described in the first embodiment above, and will not be elaborated here.

[0053] Embodiment Three

[0054] An embodiment of the present invention provides a strip cutting method on a strip continuous production line, which can be used in the first embodiment or the second embodiment above to cut the strip into sheet products.

[0055] This strip cutting method includes the following steps:

[0056] Arrange a cutting head 301 above the strip running channel;

[0057] Design the running path of the cutting head so that the cutting head 301 follows the strip in the length direction of the strip and makes a transverse cutting movement relative to the strip in the width direction of the strip;

[0058] When the strip runs to the set position, the cutting head 301 moves according to the designed running path of the cutting head to cut the strip.

[0059] Among them, a thermal cutting method or a water cutting method can be adopted. The thermal cutting method is preferably a laser cutting method. Correspondingly, the cutting head 301 is a laser cutting head; for the water cutting method, the cutting head 301 is correspondingly a water cutting head / water knife.

[0060] Obviously, the above cutting head 301 needs to be able to move. Correspondingly, the cutting head 301 is configured with a cutting head driving mechanism, and the cutting head driving mechanism has a first driving stroke for driving the cutting head 301 to move in the length direction of the strip running channel and a second driving stroke for driving the cutting head 301 to move in the width direction of the strip running channel. In one embodiment, such as Figure 2 , a gantry cutting machine is adopted, specifically including:

[0061] Machine tool main body part: It includes a gantry 303 and a movable seat. The gantry 303 can slide along the length direction of the strip running channel to realize the movement of the cutting head 301 in the X direction. The movable seat can traverse on the gantry 303 to realize the movement of the cutting head 301 in the Y direction. Further, it can be set that the movable seat can move up and down relative to the gantry 303 to realize the movement of the cutting head 301 in the Z direction, which can assist in focusing and improve the focusing efficiency and accuracy of the cutting head 301. The drive of the gantry 303 and the drive of the movable seat are preferably servo motors, which can be driven correctly and accurately according to the control program; the laser 302 is installed on the above-mentioned movable seat, and the laser emitted by the laser 302 is emitted from the cutting head 301 to the surface of the strip to realize the strip cutting operation;

[0062] CNC system: Controls the X, Y, and Z direction movements of the cutting head 301 of the machine tool main body, and also controls the output power of the laser 302.

[0063] Further, the above-mentioned cutting machine further includes an exhaust and dust removal mechanism, which removes the soot and dust generated during processing and conducts dust removal treatment to make the waste gas emission meet the environmental protection requirements.

[0064] Further, a waste collection unit is also provided below the strip conveying channel. The waste collection unit can be equipped with slag discharging equipment to facilitate the timely discharge of the collected waste.

[0065] Such as Figure 4 , since the cutting head 301 has movements in both the strip length direction and the strip width direction at the same time, the presented cutting head running path is an oblique running path with an angle relative to the strip length direction.

[0066] Among them, the factors considered in the design of the above-mentioned cutting head running path mainly include strip specifications, strip running speed, cutting time, etc. The starting running position of the cutting head 301 can be determined by the strip specifications, the X-direction moving speed of the cutting head 301 is mainly determined by the strip running speed, and the Y-direction moving speed of the cutting head 301 can be determined by combining the cutting time requirement with the strip specifications. For different working conditions, the cutting head running path will be different, but all cutting head running paths will be within the range of the two boundary running paths of the cutting head 301 (such as Figure 4 shown).

[0067] It can be understood that "making the cutting head 301 follow the strip in the strip length direction" means that the X-direction moving speed of the cutting head 301 needs to be consistent with the strip running speed. The strip running speed is controlled by the strip conveying device 100. Therefore, the cutting head drive mechanism can be interlocked with the strip conveying device 100 to ensure the above-mentioned follow-up requirement and avoid causing strip waste.

[0068] Based on the above method, in this embodiment, the online continuous cutting operation of the strip on the strip processing production line can be realized without stopping the shear or flying shear, ensuring the reliability and smoothness of strip production, and is particularly suitable for the online continuous cutting operation of high-strength steel plates.

[0069] Further optimize the above method, such as Figure 4 , according to the cutting head operation range defined by the cutting head operation path under different working conditions, the strip running channel is divided into a cutting area 110 and a non-cutting area 120, and a protection design is carried out on the strip conveying device 100 in the cutting area 110. Based on this design, the strip conveying device 100 can be better protected, and a matching design of the strip conveying device 100 in the cutting area 110 and the non-cutting area 120 can effectively reduce the equipment cost and maintenance cost.

[0070] In one embodiment, in the cutting area 110, the conveying surface of the strip conveying device 100 adapted to contact the strip is made of a material resistant to laser irradiation, such as copper plating on the conveying surface or forming other material layers resistant to laser irradiation. The above structure can better protect the strip conveying device 100, avoid the laser passing through the strip and ablating the strip conveying device 100, and avoid the strip conveying device 100 having surface defects that affect the strip surface quality.

[0071] In one embodiment, such as Figure 3 and Figure 4 , in the cutting area 110, the strip conveying device 100 includes a plurality of conveying units arranged in sequence along the length direction of the strip running channel, and each conveying unit includes at least one first conveying roller 102 mounted on the driving roller shaft 101; when a plurality of first conveying rollers 102 are mounted on the driving roller shaft 101, the first conveying rollers 102 are arranged at intervals in sequence on the driving roller shaft 101.

[0072] Arranging the first conveying rollers 102 at intervals can reduce the strip conveying equipment that may be within the influence range of the cutting medium (such as the laser irradiation range), thereby correspondingly reducing the damage to the strip conveying device 100 during the strip cutting process. In addition, using the first conveying roller 102 as the conveying equipment, on the premise of ensuring the reliable conveying requirements for the strip, the replacement of the first conveying roller 102 is also very convenient. Just replace the defective first conveying roller 102 with a new standardized first conveying roller 102, avoiding the situation where the entire conveying roller needs to be replaced for traditional roller-type conveying equipment, which can reduce the maintenance cost; correspondingly, the first conveying roller 102 is detachably and fixedly mounted on the driving roller shaft 101.

[0073] In the above solution of "the conveying surface is made of a material resistant to laser irradiation", correspondingly, it is only necessary that the outer edge surface of the first conveying roller 102 is made of a material resistant to laser irradiation, which can also significantly reduce the consumption of the material resistant to laser irradiation required.

[0074] In one embodiment, as Figure 3 and Figure 4 , in the above first conveying roller 102, the cross-section of the rim ring for contacting the strip is spindle-shaped, that is, the rim ring is a tapered structure from the inner ring to the outer ring. Based on this structure, the contact range between the first conveying roller 102 and the strip can be further reduced, that is, the area of the above-mentioned conveying surface is reduced, thereby reducing the damage caused by the cutting medium to the strip conveying equipment.

[0075] The above first conveying roller 102 may further include a core ring, which is sleeved on the driving roller shaft 101, and the above rim ring is sleeved on the core ring; wherein, the rim ring and the core ring are preferably detachably connected, for example, they are connected by an adapter plate. The adapter plate and the rim ring can be connected by bolts or the like, and the adapter plate can be welded and fixed on the core ring or fixed on the core ring by bolts. Based on the above structure, the maintenance of the first conveying roller 102 can be facilitated, that is, only the rim ring needs to be replaced, which can effectively reduce the maintenance cost.

[0076] Furthermore, as Figure 3 , in the cutting area 110, a protective tube 105 is sleeved on the exposed driving roller shaft 101 (that is, the roller shaft section without the first conveying roller 102 sleeved) to prevent the cutting medium from damaging the driving roller shaft 101 during the cutting process, and further reduce the maintenance cost.

[0077] Further preferably, as Figure 3 and Figure 4 , a plurality of second conveying rollers 103 are installed on the shaft section of the driving roller shaft 101 extending to the non-cutting area 120. The outer peripheral surface of the second conveying roller 103 is preferably a cylindrical ring surface, which has a relatively large contact area with the strip, ensures the reliable conveying of the strip, and at the same time can improve the force uniformity of each shaft section of the driving roller shaft 101, and avoid defects such as torsional deformation of the driving roller shaft 101.

[0078] Among them, the conveying rollers on the driving roller shaft 101 are arranged at equal intervals to prevent the strip from running off track.

[0079] It can be understood that the axis of the above driving roller shaft 101 is parallel to the width direction of the strip running channel, and the first conveying roller 102 and the second conveying roller 103 are preferably coaxially installed on the driving roller shaft 101. The above driving roller shaft 101 is connected with a conveying driving mechanism 104 for driving it to rotate around its own axis. The conveying driving mechanism 104 can adopt a gear motor or an electric motor, and is preferably a servo motor or a servo electric motor.

[0080] Preferably, the strip conveying device 100 before and after the cutting station also adopts the structural form of a driving roller shaft 101 sleeved with a plurality of conveying discs. In the length direction of the strip running channel, the driving roller shafts 101 are preferably arranged at equal intervals in sequence. Further, as Figure 4 , each group of conveying driving mechanisms 104 are respectively arranged on both sides of the strip conveying channel, and further preferably, there is a driving roller shaft 101 between two adjacent groups of conveying driving mechanisms 104 on the same side; based on this design, the strip running deviation can be effectively prevented.

[0081] In one embodiment, when cutting the strip, pressure is applied to the strip on both sides of the cutting seam to prevent the cut strip from bouncing upwards, so as to better protect the cutting equipment. A strip pressing mechanism 200 can be correspondingly configured. Among them, in order to cooperate with the running of the strip and the running of the cutting head 301, the pressing part of the strip pressing mechanism 200 should be able to keep following the strip.

[0082] In one embodiment, the above-mentioned strip pressing mechanism 200 is configured with an X-direction driving structure. For example, a pressing frame 201 with a traveling mechanism is adopted and equipped with a traveling driving structure (such as a motor). The pressing frame 201 can share the X-direction guide rail with the gantry of the gantry cutting machine, or an X-direction guide rail can be separately configured for it; correspondingly, strip pressing mechanisms 200 need to be respectively arranged on the front and back sides of the cutting machine. In another embodiment, the strip pressing mechanism 200 is integrally installed with the cutting machine. For example, the above-mentioned pressing frame 201 is installed on the gantry 303 of the gantry cutting machine. Since the strip on both sides of the cutting seam needs to be pressed respectively, installation brackets can be respectively arranged on the front and back sides of the gantry 303 for installing the pressing frame 201.

[0083] Preferably, as Figure 2 and Figure 5 , the above-mentioned strip pressing mechanism 200 includes a pressing beam 202 and a pressing-down driving structure 203 for driving the pressing beam 202 to lift. The pressing-down driving structure 203 can drive the pressing beam 202 to move between the working position and the standby position. In the working position, the pressing beam 202 presses against the surface of the strip, and the standby position is above the working position. Among them, the pressing beam 202 can adopt a pressing plate with a plate surface parallel to the horizontal plane. Of course, a pressing roller, etc. are also applicable to this embodiment. The above-mentioned pressing-down driving structure 203 can adopt a linear driving device such as a cylinder or a hydraulic cylinder, or a driving method such as a motor + transmission component. The above-mentioned pressing-down driving structure 203 is installed on the pressing frame 201 and is connected to the pressing beam 202.

[0084] Preferably, as Figure 5, a guiding structure is provided on the pressing frame 201 for guiding the lifting movement of the pressing beam 202, improving the lifting stability and reliability of the pressing beam 202; this guiding structure can adopt the guiding mode of guide rod 2041 - guide sleeve 2042, or the guiding mode of guide rail - guide slider, which will not be listed one by one here. In this embodiment, as Figure 5 , a plurality of guide rods 2041 are installed on the pressing beam 202, and a plurality of guide holes are correspondingly arranged on the pressing frame 201; further, guide sleeves 2042 can be installed in the guide holes, preferably, at least part of the guide sleeves 2042 adopt self-lubricating sleeves.

[0085] Among them, an upper limit block can be arranged on the guide rod 2041 to limit the downward stroke of the guide rod 2041, thereby limiting the downward stroke of the pressing beam 202 and preventing the pressing beam 202 from separating from the pressing frame 201; a lower limit block can also be arranged on the guide rod 2041 to limit the upward stroke of the guide rod 2041 and the pressing beam 202.

[0086] Furthermore, as Figure 5 , the above strip pressing mechanism 200 further includes a buffering structure, which is arranged between the pressing beam 202 and the pressing frame 201. On the one hand, it can improve the pressure self-adaptability when applying pressure to the strip, and on the other hand, it can effectively buffer the rebound force of the strip and reduce the impact on the pressing drive structure 203, etc. In one embodiment, as Figure 5 , the above buffering structure includes multiple groups of buffer springs 205. The top end of the buffer spring 205 abuts against the pressing frame 201, and the bottom end abuts against the pressing beam 202; in the above scheme with the guide rod 2041, the buffer spring 205 can be sleeved on the guide rod 2041, which can restrict the buffer spring 205 to only perform vertical telescopic activities. Further, a plurality of sinking grooves are provided at the bottom of the pressing frame 201, and the number of the sinking grooves is the same as that of the buffer springs 205 and they are correspondingly arranged one by one. The top end of the buffer spring 205 is received in the corresponding sinking groove, which can improve the smoothness and reliability of the vertical telescopic activities of the buffer spring 205; in the scheme of arranging a plurality of guide holes on the pressing frame 201, the guide holes can correspondingly adopt stepped holes with a narrower upper part and a wider lower part, and the large-diameter hole section of the stepped hole constitutes the above sinking groove.

[0087] In one embodiment, as Figure 6 and Figure 7, a guide plate 206 is further provided on the pressing frame 201. The guide plate 206 is installed at the front end of the pressing frame 201 (i.e., the incoming steel side end). The bottom end of the guide plate 206 is preferably not higher than the horizontal plane where the pressing beam is in the standby position. The bottom surface of the guide plate 206 is preferably an inclined guide surface, and the inclined guide surface slopes downward from the front end to the rear end of the guide plate 206 (i.e., the front end of the guide surface is above the rear end). When the leading end passes through, the guide plate 206 can prevent the leading end from warping too much and damaging the pressing plate, and can assist in threading the tape, improving production efficiency. For the case where pressing frames 201 are provided at both the front and rear of the cutting machine, it is preferred to configure the guide plate 206 only for the pressing frame 201 on the front side of the cutting machine.

[0088] In one embodiment, the above pressing beam 202 is a beam made of an electromagnet, or an electromagnet is provided on the pressing beam 202. The control power supply of the electromagnet can be installed on the pressing frame 201 or connected to an external power supply through wiring of the pressing frame 201. Based on the above structure, when the pressing beam 202 is pressed down, the electromagnet is energized, which can make the pressing beam 202 adsorb and press against the surface of the strip, significantly improving the pressing effect on the strip and the running synchronism.

[0089] The embodiment of the present invention correspondingly further provides a strip cutting device, which can be used in the above-mentioned first embodiment or the second embodiment to cut the strip into sheet products. The specific installation position has been described above and will not be elaborated here.

[0090] The strip cutting device includes:

[0091] A cutting head 301 arranged above the strip running channel. The cutting head 301 is configured with a cutting head driving mechanism. The cutting head driving mechanism has a first driving stroke for driving the cutting head 301 to move in the length direction of the strip running channel and a second driving stroke for driving the cutting head 301 to move in the width direction of the strip running channel;

[0092] A controller for receiving a cutting instruction and controlling the cutting head driving mechanism to work when the strip runs to a set position so that the cutting head 301 moves according to a preset cutting head running path and cuts the strip. The cutting head running path satisfies that the cutting head 301 follows the strip in the length direction of the strip and performs a transverse cutting movement relative to the strip in the width direction of the strip.

[0093] Among them, the above controller can be integrated into the central control room of the production line.

[0094] The above cutting head 301 is preferably a laser cutting head.

[0095] The relevant components and structures of the above strip cutting device can be referred to the foregoing relevant content and will not be elaborated here.

[0096] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A strip processing production line with a secondary rolling process, comprising an uncoiling section, a first annealing and pickling section, and a first product collection section that are sequentially connected and arranged along the running direction of the strip, characterized in that: It further includes a rolling mill, a second annealing and pickling section, a shape finishing section, and a second product collecting section that are connected in sequence along the running direction of the strip. The first product collecting section is connected to the rolling mill through a strip transfer structure; The first product collecting section includes a first coiler, a first sheet collecting device, and a strip cutting device. The first coiler is connected to the first sheet collecting device through a transition guide plate. The strip cutting device is arranged on the incoming material side of the first coiler or between the first coiler and the first sheet collecting device; The second product collecting section includes a second coiler and a second sheet collecting device. The second coiler is connected to the second sheet collecting device through a transition guide plate; The strip processing production line has two production processes: After the strip raw material is processed through the uncoiling section and the first annealing and pickling section in sequence, the obtained product is collected through the first product collecting section; After the strip raw material is processed through the uncoiling section, the first annealing and pickling section, the rolling mill, the second annealing and pickling section, and the shape finishing section in sequence, the obtained product is collected through the second product collecting section; The raw material coil is a hot-rolled black coil stainless steel or a cold-hardened stainless steel or a hot-rolled titanium coil; The strip cutting device includes: A cutting head arranged above the strip running channel. The cutting head is equipped with a cutting head driving mechanism. The cutting head driving mechanism has a first driving stroke for driving the cutting head to move in the length direction of the strip running channel and a second driving stroke for driving the cutting head to move in the width direction of the strip running channel; A controller. The controller is used to receive a cutting instruction and control the cutting head driving mechanism to work when the strip runs to a set position so that the cutting head moves according to a preset cutting head running path and cuts the strip. The cutting head running path is such that the cutting head follows the strip in the length direction of the strip and makes a transverse cutting movement relative to the strip in the width direction of the strip; The cutting head is a laser cutting head; Among them, according to the cutting head running range defined by the cutting head running path under different working conditions, the strip running channel is divided into a cutting area and a non-cutting area, and a protection design is carried out for the strip conveying device in the cutting area; In the cutting area, the strip conveying device includes a plurality of conveying units arranged in sequence along the length direction of the strip running channel. Each conveying unit includes at least one first conveying roller disk installed on a driving roller shaft. When a plurality of first conveying roller disks are installed on the driving roller shaft, the first conveying roller disks are arranged at intervals in sequence on the driving roller shaft. The cross-section of the rim ring of the first conveying roller disk for contacting the strip is spindle-shaped; A plurality of second conveying roller disks are installed on the shaft section of the driving roller shaft extending to the non-cutting area. The outer peripheral surface of the second conveying roller disk is a cylindrical ring surface.

2. The strip processing production line with a secondary rolling process as described in claim 1, characterized in that: The second annealing and pickling section includes an argon-protected rapid heating annealing furnace and a light pickling unit. The argon-protected rapid annealing furnace uses an electric resistance furnace or an induction heating furnace.

3. The strip processing production line with a secondary rolling process according to claim 2, characterized in that: The light pickling unit includes a neutral salt electrolysis section and a mixed acid pickling section.

4. The strip processing production line with a secondary rolling process according to claim 1, characterized in that: The rolling mill uses an online 18-high rolling mill or a 6-high tandem rolling mill with small roll diameters.

5. The strip processing production line with a secondary rolling process as described in claim 1, characterized in that: The decoiling section includes a double decoiler and a welding machine, and both decoilers are connected to the welding machine.

6. A strip processing method, characterized in that, This method is carried out based on the strip processing production line with a secondary rolling process described in any one of claims 1 to 5, wherein When processing hot-rolled strips, after the strip raw material is successively processed by the decoiling section and the first annealing and pickling section, the obtained product is collected by the first product collection section; When processing cold-rolled strips or when the strip needs to be thinned, after the strip raw material is successively processed by the decoiling section, the first annealing and pickling section, the rolling mill, the second annealing and pickling section, and the shape finishing section, the obtained product is collected by the second product collection section; The strip is made of stainless steel or titanium; The products collected by the first product collection section and the second product collection section are coils or sheets.

7. The strip processing method according to claim 6, characterized in that: The second annealing and pickling section includes an argon-protected rapid heating annealing furnace and a light pickling unit. The argon-protected rapid annealing furnace uses an electric resistance furnace or an induction heating furnace; the light pickling unit includes a neutral salt electrolysis section and a mixed acid pickling section. Among them, the mixed acid pickling section uses a mixed acid pickling solution of HF and HNO3.

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