Ultra-thin stainless steel strip rolling and sandblasting equipment and method

Abstract

The present invention provides a rolling and sandblasting device and method for an ultra-thin stainless steel strip. The rolling and sandblasting device for the ultra-thin stainless steel strip includes a rough rolling device, a first annealing furnace, a finish rolling device, a second annealing furnace, a tension leveling device, a sandblasting device and a coiling device which are connected in sequence. The sandblasting device includes a machine body, an upper pressure roller, a reversing roller and a lower pressure roller. A feed hopper is arranged at the top of the machine body, and a first sandblasting nozzle and a second sandblasting nozzle are arranged at the lower end of the feed hopper. The first sandblasting nozzle is used for spraying sand grains onto the first surface of the stainless steel strip, and the second sandblasting nozzle is used for spraying sand grains onto the second surface of the stainless steel strip. The rolling and sandblasting device for the ultra-thin stainless steel strip provided by the present invention uses the rough rolling device and the finish rolling device to roll the stainless steel blank twice to obtain the stainless steel strip. The sandblasting device uses the reversing roller to reverse the stainless steel strip so as to perform sandblasting treatment on the first surface and the second surface of the stainless steel strip respectively, ensuring the surface quality of the stainless steel strip and improving the production efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of sandblasting for ultra-thin steel strip rolling, and more specifically, relates to an ultra-thin stainless steel strip rolling sandblasting device and method. Background Art

[0002] As a type of high-alloy steel, stainless steel can effectively resist the corrosion of the environment in the air or chemical corrosion media. Without surface treatments such as plating colors, stainless steel can achieve good corrosion resistance using its inherent surface properties. Especially for ultra-thin stainless steel strips, they exhibit superior product characteristics.

[0003] The thickness of the ultra-thin stainless steel strip can reach 0.03 - 1.5 mm, and the width is generally 500 - 650 mm. It is generally processed and formed by cold rolling technology. The products are mainly applied to precision products in industries such as aerospace information technology, computers, automotive parts, precision stamping parts, instruments, chemicals, medical treatment, and household appliances. Due to the relative precision of the products, strict requirements are imposed on the surface quality of the ultra-thin stainless steel strip.

[0004] During the rolling process of the ultra-thin stainless steel strip, due to relatively large rolling tension and pressure, problems such as surface color difference and uneven roughness are likely to occur. In the prior art, sandblasting is often used for treatment. The surface of the stainless steel strip is cleaned and roughened by the impact of a high-speed sand flow, so that the surface of the workpiece can obtain a certain degree of cleanliness and different roughness. Traditional spraying equipment generally has the problem of uneven sandblasting force, which is likely to affect the surface quality of the stainless steel strip. Using the traditional up-and-down spraying method is easily affected by gravity, which affects the surface quality of the product and is not conducive to the ultra-thin stainless steel strip entering the high-end industry. Summary of the Invention

[0005] The purpose of the present invention is to provide an ultra-thin stainless steel strip rolling sandblasting device and method, which can perform uniform sandblasting on the ultra-thin stainless steel strip and improve the surface quality of the product.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: to provide an ultra-thin stainless steel strip rolling sandblasting device, including a rough rolling device, a first annealing furnace, a finishing rolling device, a second annealing furnace, a tension leveling device, a sandblasting device, and a coiling device connected in sequence. A cleaning pool for cleaning the cold rolling lubricating oil on the surface of the stainless steel billet is provided between the rough rolling device and the first annealing furnace, and a treatment pool for degreasing the stainless steel strip is provided between the finishing rolling device and the second annealing furnace; the sandblasting device includes:

[0007] A machine body, with a feed hopper for accommodating sand grains at the top. The lower end of the feed hopper is provided with a first sandblasting nozzle and a second sandblasting nozzle. The bottom of the machine body has a lower opening, and a guiding roller for guiding the stainless steel strip into the lower opening is provided inside the machine body;

[0008] The upper pressure roller is rotatably connected to the inside of the machine body. The upper pressure roller is located above the stainless steel belt and is used to press against the first surface of the stainless steel belt to fix the abrasive grains.

[0009] The reversing roller is rotatably connected to the outlet end of the machine body and is used to reverse the stainless steel belt so that the second surface of the stainless steel belt is located above the first surface.

[0010] The lower pressure roller is rotatably connected to the inside of the machine body. The lower pressure roller is located above the stainless steel belt and is used to press against the second surface of the stainless steel belt to fix the abrasive grains.

[0011] Wherein, the first sand blasting nozzle is used to spray abrasive grains onto the first surface of the stainless steel belt, and the second sand blasting nozzle is used to spray abrasive grains onto the second surface of the stainless steel belt. In the running direction of the stainless steel belt, both the first sand blasting nozzle and the second sand blasting nozzle are located between the upper pressure roller and the lower pressure roller.

[0012] In a possible implementation manner, two sets of floating components are further provided inside the machine body. The two sets of floating components are respectively located below the upper pressure roller and the lower pressure roller to support the stainless steel belt. Each set of floating components respectively includes:

[0013] The floating support plate is slidably matched with the machine body in the up and down direction and can move up and down to cooperate with the upper pressure roller or the lower pressure roller to press against the first surface and the second surface of the stainless steel belt respectively.

[0014] The top support cam, the main shaft is rotatably connected to the inner wall of the machine body in the horizontal direction. The top support cam is connected with a rotation driving member. The top support cam is supported below the floating support plate and is used to abut against the bottom wall of the floating support plate to drive the floating support plate to move up and down.

[0015] Wherein, a torque sensor capable of monitoring the torque parameter of the top support cam is provided at the end of the top support cam. The torque sensor is electrically connected to a controller. The torque sensor can send the torque parameter to the controller. The controller is electrically connected to the rotation driving member and is used to send a rotation action instruction to the rotation driving member.

[0016] In a possible implementation manner, four top support cams are provided below the same floating support plate, and the four top support cams are respectively located below the four corners of the floating support plate.

[0017] In some embodiments, the rotation driving member is a bidirectional motor capable of driving the top support cam in both forward and reverse directions. The bidirectional motor is a double-output shaft motor. Two bidirectional motors are provided below the same floating support plate, and the two output shafts of the same bidirectional motor are respectively connected to two coaxially arranged top support cams.

[0018] In a possible implementation, the first sandblasting nozzle is connected to the lower end of the feed hopper through a riser pipe. There are two second sandblasting nozzles, which are respectively connected to the lower part of the feed hopper through two bent pipes located on both sides of the riser pipe. The bent pipes extend downward above the second surface of the stainless steel strip and bend and incline toward the side close to the central axis of the stainless steel strip.

[0019] In a possible implementation, cooling devices are respectively arranged on the first annealing furnace and the second annealing furnace. The cooling device includes:

[0020] A cooling box is arranged in the middle of the extension direction of the first annealing furnace or the second annealing furnace. The first annealing furnace or the second annealing furnace penetrates through the cooling box. A cooling interlayer is arranged on the peripheral wall of the cooling box;

[0021] A plurality of spray nozzles are respectively arranged on both sides of the first annealing furnace or the second annealing furnace, and are used for spraying the stainless steel strip to cool the stainless steel strip.

[0022] In a possible implementation, the coiling device includes:

[0023] A bracket is arranged below the lower opening;

[0024] A tensioning roller is rotatably connected above the bracket and is located on the side of the import end of the lower opening away from the machine body;

[0025] A coiling roller is rotatably arranged above the bracket and is slidably connected to the bracket in the vertical direction. The coiling roller is located above the tensioning roller and is in rolling cooperation with the tensioning roller, and is used for coiling the stainless steel strip on the tensioning roller.

[0026] In some embodiments, two upright columns extending upward are arranged on the bracket. A receiving groove extending in the vertical direction and opening upward is arranged at the top of the upright column. Both ends of the coiling roller have shaft ends rotatably connected in the receiving groove, and the shaft ends are slidably connected to the receiving groove in the vertical direction.

[0027] In some embodiments, a pressing component for elastically pressing the shaft end is hinged to the top of the upright column. The pressing component includes:

[0028] A swing plate is rotatably connected to the upper end of the upright column;

[0029] An elastic member is connected to the plate surface of the swing plate and extends perpendicular to the plate surface of the swing plate;

[0030] A mating half sleeve is connected to the outer extending end of the elastic member. The mating half sleeve is used to be arranged in the receiving groove and can move up and down along the receiving groove along with the shaft end.

[0031] The solution shown in the embodiments of this application, compared with the prior art, the ultra-thin stainless steel strip rolling and sandblasting equipment provided by the embodiments of this application uses a rough rolling device and a finishing rolling device to roll a stainless steel blank twice to obtain a stainless steel strip. The sandblasting device uses a reversing roller to reverse the stainless steel strip, so that the first surface and the second surface of the stainless steel strip are sequentially in the upward position for the first sandblasting nozzle and the second sandblasting nozzle to perform sandblasting operations respectively. Combined with the settings of the upper pressing roller and the lower pressing roller, the sand grains on the first surface and the second surface of the stainless steel strip can be effectively fixed, ensuring the surface quality of the stainless steel strip. Then, the stainless steel strip is coiled into a roll by a coiling device, realizing the integration of the stainless steel strip production process, facilitating the reduction of labor intensity and improving production efficiency.

[0032] The present invention also provides an ultra-thin stainless steel strip rolling and sandblasting method, and the ultra-thin stainless steel strip rolling and sandblasting method includes the following steps:

[0033] S100: Select a stainless steel blank with a thickness of 2 - 3.5 mm as the raw material according to the type, hardness and thickness requirements of the preset product;

[0034] S200: Feed the stainless steel blank into the rough rolling device and perform 6 - 7 passes of rolling to obtain a stainless steel strip blank with a thickness of 0.3 - 0.8 mm. During the cold rolling process, the rolling speed is 800 - 1200 m / min, the unit tension is 200 - 400 N / mm, and cold rolling oil is used for lubrication during rolling, and the temperature of the rolling oil is 35 - 45 °C;

[0035] S300: Feed the stainless steel strip blank into a cleaning tank to wash off the cold rolling lubricating oil, and then feed the stainless steel strip blank into a first annealing furnace for annealing. The temperature of the heating section is 1100 - 1150 °C, the temperature of the cooling section is 450 - 650 °C, and the speed of the stainless steel strip blank in the annealing furnace is 120 - 150 m / min;

[0036] S400: Feed the stainless steel strip blank into the finishing rolling device and perform 4 - 5 passes of rolling to obtain a stainless steel strip with a thickness of 0.1 mm. During the cold rolling process, the rolling speed is 300 - 500 m / min, the unit tension is 150 - 300 N / mm, and cold rolling oil is used for lubrication during rolling, and the temperature of the rolling oil is 35 - 45 °C;

[0037] S500: After feeding the stainless steel strip into a treatment tank for degreasing treatment, feed the stainless steel strip into a second annealing furnace for annealing. The temperature of the heating section is 1000 - 1100 °C, the temperature of the cooling section is 60 - 100 °C, and the speed of the steel strip in the annealing furnace is 150 - 300 m / min;

[0038] S600: Perform a stretch leveling treatment on the stainless steel strip at an elongation rate of 0.25% - 0.7%;

[0039] S700: Feed the stainless steel strip into the sandblasting device. The first sandblasting nozzle sprays sand grains onto the first surface of the stainless steel strip. The stainless steel strip changes direction under the action of the reversing roller. The second sandblasting nozzle sprays sand grains onto the second surface of the stainless steel strip to complete the sandblasting operation.

[0040] S800: Under the action of the guiding roller, feed the stainless steel strip into the coiling device to complete the coiling operation.

[0041] Compared with the prior art, the ultra-thin stainless steel strip rolling and sandblasting method provided in this embodiment uses a rough rolling device and a finish rolling device to roll the stainless steel billet twice to obtain a stainless steel strip. During this process, annealing treatments are respectively carried out using the first annealing furnace and the second annealing furnace to ensure the forming quality of the stainless steel strip. Then, the sandblasting device sequentially performs sandblasting operations on the first surface and the second surface of the stainless steel strip. Combined with the settings of the upper pressing roller and the lower pressing roller, the sand grains on the first surface and the second surface of the stainless steel strip can be effectively fixed, ensuring the surface quality of the stainless steel strip. Then, the coiling device is used to coil the stainless steel strip into a roll, realizing the integration of the stainless steel strip production process, facilitating the reduction of labor intensity and the improvement of production efficiency. Description of the Drawings

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0043] Figure 1 It is a schematic flow structure diagram of the ultra-thin stainless steel strip rolling and sandblasting equipment provided in the embodiment of the present invention;

[0044] Figure 2 It is a front cross-sectional structure diagram of the first annealing furnace and the cooling device provided in the embodiment of the present invention;

[0045] Figure 3 It is a front cross-sectional structure diagram of the sandblasting device provided in the embodiment of the present invention;

[0046] Figure 4 For the embodiment of the present invention Figure 3 It is a left view structure diagram of the feed hopper, the first sandblasting nozzle and the second sandblasting nozzle in the embodiment;

[0047] Figure 5 For the embodiment of the present invention Figure 3 It is a bottom view structure diagram of the floating component in the embodiment;

[0048] Figure 6 For the embodiment of the present invention Figure 3Schematic enlarged front view structure of the floating component, stainless steel strip and the lower pressing roller;

[0049] Figure 7 Schematic structure diagram of the coiling device provided by the embodiment of the present invention;

[0050] Figure 8 For the embodiment of the present invention Figure 7 Partial enlarged structure schematic diagram of I in;

[0051] Figure 9 For the embodiment of the present invention Figure 7 Schematic structure diagram of the coiling device in the use state.

[0052] Wherein, each reference numeral in the figure:

[0053] 1, rough rolling device; 11, cleaning pool; 12, first annealing furnace; 2, finish rolling device; 21, treatment pool; 22, second annealing furnace; 3, tension leveling device; 4, sandblasting device; 41, body; 411, feed hopper; 412, lower opening; 42, upper pressing roller; 43, reversing roller; 44, lower pressing roller; 45, guiding roller; 5, coiling device; 51, bracket; 52, tensioning roller; 53, coiling roller; 54, column; 541, accommodating groove; 55, pressing component; 551, swing plate; 552, elastic member; 553, mating half sleeve; 56, drive motor; 6, floating component; 61, floating support plate; 62, top support cam; 63, bidirectional motor; 71, first sandblasting nozzle; 72, second sandblasting nozzle; 73, riser pipe; 74, bent pipe; 8, cooling device; 81, cooling box; 811, cooling interlayer; 82, spraying nozzle; 9, stainless steel strip; 91, first surface; 92, second surface. Detailed implementation manners

[0054] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0055] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or several of such features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise specifically defined.

[0056] Please refer to Figures 1 to 9 , and now the ultra-thin stainless steel strip rolling and sandblasting equipment and method provided by the present invention will be described. The ultra-thin stainless steel strip rolling and sandblasting equipment includes a rough rolling device 1, a first annealing furnace 12, a finish rolling device 2, a second annealing furnace 22, a tension leveling device 3, a sandblasting device 4, and a coiling device 5 that are connected in sequence. A cleaning pool 11 for cleaning the cold rolling lubricating oil on the surface of the stainless steel billet is provided between the rough rolling device 1 and the first annealing furnace 12. A treatment pool 21 for degreasing the stainless steel strip 9 is provided between the finish rolling device 2 and the second annealing furnace 22; the sandblasting device 4 includes a machine body 41, an upper pressure roller 42, a reversing roller 43, and a lower pressure roller 44. A feed hopper 411 for accommodating sand grains is provided at the top of the machine body 41. The lower end of the feed hopper 411 is provided with a first sandblasting nozzle 71 and a second sandblasting nozzle 72. The bottom of the machine body 41 is provided with a lower opening 412. A guiding roller 45 for guiding the stainless steel strip 9 into the lower opening 412 is provided inside the machine body 41; the upper pressure roller 42 is rotatably connected inside the machine body 41. The upper pressure roller 42 is located above the stainless steel strip 9 and is used to press against the first surface 91 of the stainless steel strip 9 to fix the sand grains; the reversing roller 43 is rotatably connected to the outlet end of the machine body 41 and is used to reverse the stainless steel strip 9 so that the second surface 92 of the stainless steel strip 9 is located above the first surface 91; the lower pressure roller 44 is rotatably connected inside the machine body 41. The lower pressure roller 44 is located above the stainless steel strip 9 and is used to press against the second surface 92 of the stainless steel strip 9 to fix the sand grains;

[0057] Among them, the first sandblasting nozzle 71 is used to spray sand grains onto the first surface 91 of the stainless steel strip 9, and the second sandblasting nozzle 72 is used to spray sand grains onto the second surface 92 of the stainless steel strip 9. In the running direction of the stainless steel strip 9, both the first sandblasting nozzle 71 and the second sandblasting nozzle 72 are located between the upper pressure roller 42 and the lower pressure roller 44.

[0058] Compared with the prior art, the ultra-thin stainless steel strip rolling and sandblasting equipment provided in this embodiment uses a rough rolling device 1 and a finishing rolling device 2 to perform two rolling operations on a stainless steel blank to obtain a stainless steel strip 9. The sandblasting device 4 uses a reversing roller 43 to reverse the stainless steel strip 9, so that the first surface 91 and the second surface 92 of the stainless steel strip 9 are successively in the upward-facing position, for the first sandblasting nozzle 71 and the second sandblasting nozzle 72 to perform sandblasting operations respectively. Combined with the settings of the upper pressing roller 42 and the lower pressing roller 44, the sand grains on the first surface 91 and the second surface 92 of the stainless steel strip 9 can be effectively fixed, ensuring the surface quality of the stainless steel strip 9. Then, the stainless steel strip 9 is curled into a roll by a coiling device 5, realizing the integration of the production process of the stainless steel strip 9, facilitating the reduction of labor intensity and the improvement of production efficiency.

[0059] It should be noted that for the convenience of description, the raw material used before rough rolling is defined as a stainless steel blank. After rough rolling of the stainless steel blank, a stainless steel strip blank can be obtained, and then the stainless steel strip 9 is obtained through a finishing rolling process.

[0060] In this embodiment, the reversing roller 43 is used to perform a reversing operation on the stainless steel strip 9. Initially, the first surface 91 of the stainless steel strip 9 faces upward, and sand grains are sprayed onto the first surface 91 through the first sandblasting nozzle 71. Under the extrusion of the upper pressing roller 42, the sand force can adhere to the first surface 91 of the stainless steel strip 9. After that, through the reversal of the reversing roller 43, the second surface 92 of the stainless steel strip 9 faces upward, and sand grains are sprayed onto the second surface 92 through the second sandblasting nozzle 72. Under the downward pressure of the lower pressing roller 44, the sand grains are fixed on the second surface 92. Thus, the double-sided sandblasting of the stainless steel strip 9 is completed. Then, the stainless steel strip 9 is curled and formed by the coiling device 5 to complete the entire processing process.

[0061] In some possible implementation manners, referring to Figures 3 to 6 , there are also two sets of floating components 6 provided in the machine body 41. The two sets of floating components 6 are respectively located below the upper pressing roller 42 and the lower pressing roller 44 to support the stainless steel strip 9. Each set of floating components 6 respectively includes a floating support plate 61 and a top support cam 62. The floating support plate 61 is slidably matched with the machine body 41 in the up and down direction and can move up and down to cooperate with the upper pressing roller 42 or the lower pressing roller 44 to respectively press against the first surface 91 and the second surface 92 of the stainless steel strip 9; the main shaft of the top support cam 62 is rotatably connected to the inner wall of the machine body 41 in the horizontal direction. The top support cam 62 is connected with a rotation driving member. The top support cam 62 is supported below the floating support plate 61 and is used to abut against the bottom wall of the floating support plate 61 to drive the floating support plate 61 to move up and down;

[0062] Among them, a torque sensor capable of monitoring the torque parameter of the top support cam 62 is provided at the end of the top support cam 62. The torque sensor is electrically connected to a controller. The torque sensor can send the torque parameter to the controller, and the controller is electrically connected to the rotary driving member and is used to send a rotary action instruction to the rotary driving member.

[0063] In this embodiment, the floating assembly 6 is used to cooperate with the upper pressing roller 42 or the lower pressing roller 44 to ensure that the abrasive grains on the surface of the stainless steel strip 9 can be effectively adhered to the first surface 91 or the second surface 92 of the stainless steel strip 9.

[0064] Specifically, taking the floating assembly 6 below the upper pressing roller 42 as an example for illustration. The floating support plate 61 is slidably matched with the machine body 41 and can move slightly in the up and down direction under the top support of the top support cam 62. The top support cam 62 can rotate circumferentially under the driving action of the rotary driving member, and then use the outer peripheral wall of the top support cam 62 to push up the floating support plate 61 upward, so that the floating support plate 61 is lifted upward to cooperate with the upper pressing roller 42 to press the stainless steel strip 9.

[0065] When the extrusion force between the floating support plate 61 and the upper pressing roller 42 is too small, the torque sensor can detect that the torque parameter is less than the preset value. At this time, the torque sensor can send the torque parameter to the controller, and the controller makes a judgment according to the preset program and sends a rotary action instruction to the rotary driving member, so that the top support cam 62 rotates, and then the floating support plate 61 moves upward.

[0066] When the extrusion force between the floating support plate 61 and the upper pressing roller 42 is too large, the torque sensor can detect that the torque parameter is greater than the preset value. At this time, the torque sensor can send the torque parameter to the controller, and the controller makes a judgment according to the preset program and sends a rotary action instruction to the rotary driving member, so that the top support cam 62 rotates, and then the floating support plate 61 moves downward.

[0067] In some possible implementation manners, the above-mentioned feature, the top support cam 62, adopts a structure as Figure 5 shown. Refer to Figure 5 , four top support cams 62 are provided below the same floating support plate 61, and the four top support cams 62 are respectively located below the four corners of the floating support plate 61. The rotary driving member is a bidirectional motor 63 capable of driving the top support cam 62 in both forward and reverse directions. The bidirectional motor 63 is a double-output shaft motor. Two bidirectional motors 63 are provided below the same floating support plate 61, and the two output shafts of the same bidirectional motor 63 are respectively connected to two coaxially arranged top support cams 62.

[0068] In this embodiment, in order to ensure the jacking effect of the jacking cam 62 on the floating pallet 61, a jacking cam 62 is provided at each of the four corners below the floating pallet 61. On this basis, the rotary driving member adopts a bidirectional motor 63, which can realize the forward and reverse bidirectional driving of the jacking cam 62. The bidirectional motor 63 has two output shafts, which respectively rotate and drive two coaxially arranged jacking cams 62, realizing a reasonable arrangement of the structure and reducing the space occupation.

[0069] In some possible implementation manners, the above-mentioned features, the first sandblasting nozzle 71 and the second sandblasting nozzle 72, adopt structures as shown in Figure 3 and Figure 4 . Refer to Figure 3 and Figure 4 . The first sandblasting nozzle 71 is connected to the lower end of the feed hopper 411 through a riser pipe 73. The second sandblasting nozzle 72 has two, and is respectively connected to the lower part of the feed hopper 411 through two bent pipes 74 located on both sides of the riser pipe 73. The bent pipes 74 extend downward above the second surface 92 of the stainless steel strip 9 and are bent and inclined toward the side close to the axis of the stainless steel strip 9.

[0070] In this embodiment, the direction of the stainless steel strip 9 is changed by a reversing roller 43. Two layers of stainless steel strips 9 are formed inside the machine body 41. There is a gap between the two layers of stainless steel strips 9 for the second sandblasting nozzle 72 to extend into. The first sandblasting nozzle 71 is directly connected to the lower end of the feed hopper 411 through the riser pipe 73, and can directly perform sandblasting operations on the first surface 91 of the stainless steel strip 9. The second sandblasting nozzle 72 needs to avoid the upper stainless steel strip 9 in order to spray sand grains onto the second surface 92 of the lower stainless steel strip 9.

[0071] Specifically, bent pipes 74 are respectively arranged on both sides of the material in the feed hopper 411. Through the bent structure of the bent pipes 74, the upper stainless steel strip 9 is avoided, and the second sandblasting nozzle 72 is led above the second surface 92 of the lower stainless steel strip 9, realizing effective sandblasting of the second surface 92. The above structural arrangement improves the sandblasting efficiency and ensures the double-sided sandblasting quality of the stainless steel strip 9.

[0072] In some possible implementation manners, refer to Figure 2 . Cooling devices 8 are respectively arranged on the first annealing furnace 12 and the second annealing furnace 22. The cooling device 8 includes a cooling box 81 and a plurality of spray nozzles 82. The cooling box 81 is arranged in the middle of the extending direction of the first annealing furnace 12 or the second annealing furnace 22. The first annealing furnace 12 or the second annealing furnace 22 passes through the cooling box 81. A cooling interlayer 811 is provided on the peripheral wall of the cooling box 81; a plurality of spray nozzles 82 are respectively arranged on both sides of the first annealing furnace 12 or the second annealing furnace 22, and are used for spraying the stainless steel strip 9 to cool the stainless steel strip 9.

[0073] In this embodiment, a heat exchange effect can be formed between the cooling sandwich layer 811 in the cooling box 81 and the stainless steel strip blank or the stainless steel strip 9, so as to effectively cool the product. Combining with the cold air supplied by the air injection nozzle 82 can further improve the cooling efficiency, ensure the effectiveness of the annealing treatment, improve the structural quality of the stainless steel strip 9, and endow it with good heat treatment performance.

[0074] In some possible implementation manners, the above-mentioned coiling device 5 adopts structures such as Figure 3 , Figure 7 , Figure 8 and Figure 9 as shown. Referring to Figure 3 , Figure 7 , Figure 8 and Figure 9 , the coiling device 5 includes a bracket 51, a tensioning roller 52 and a coiling roller 53; the bracket 51 is arranged below the lower opening 412; the tensioning roller 52 is rotatably connected above the bracket 51 and is located on the side of the inlet end of the lower opening 412 away from the machine body 41; the coiling roller 53 is rotatably above the bracket 51 and is slidably connected to the bracket 51 in the vertical direction. The coiling roller 53 is located above the tensioning roller 52 and is in rolling cooperation with the tensioning roller 52 for coiling the stainless steel strip 9 on the tensioning roller 52.

[0075] In this embodiment, the tensioning roller 52 is driven by a driving motor 56, and can tension and guide the stainless steel strip 9 after sandblasting on the guiding roller 45, and is coiled by the coiling roller 53 in rolling cooperation with the tensioning roller 52, so as to realize the coiling process of the stainless steel strip 9.

[0076] This structure does not require power driving for the coiling roller 53, and the stainless steel strip 9 can be wound around the coiling roller 53 through the rolling cooperation between the coiling roller 53 and the tensioning roller 52. As the thickness of the stainless steel strip 9 gradually increases, the coiling roller 53 can move upward to increase the distance between the coiling roller 53 and the tensioning roller 52, ensuring the effectiveness of coiling, avoiding the speed asynchrony caused by additionally arranging a driving member for driving the coiling roller 53, reducing energy consumption, and ensuring the coiling quality requirements of the stainless steel strip 9.

[0077] In some embodiments, the above-mentioned bracket 51 can adopt structures such as Figure 7 and Figure 8 as shown. Referring to Figure 7 and Figure 8 , two upright columns 54 extending upward are provided on the bracket 51, and a receiving groove 541 extending in the vertical direction and opening upward is provided at the top of the upright column 54. Both ends of the coiling roller 53 have shaft ends rotatably connected in the receiving groove 541, and the shaft ends are slidably connected in the receiving groove 541 in the vertical direction.

[0078] In this embodiment, a column 54 for supporting the coiling roll 53 and the tensioning roll 52 is provided on the bracket 51, and both ends thereof are rotatably connected to the column 54. Specifically, a receiving groove 541 extending in the vertical direction is provided at the top of the column 54, which can not only support the shaft end of the coiling roll 53 and rotate with it, but also achieve the effect of sliding cooperation with the shaft end of the coiling roll 53 in the vertical direction, meeting the requirement of the continuous upward movement of the coiling roll 53 during the coiling process.

[0079] In some embodiments, the above-mentioned column 54 may adopt the structure as shown in Figure 7 and Figure 8 . Referring to Figure 7 and Figure 8 , a pressing assembly 55 for elastically pressing the shaft end is hinged at the top of the column 54. The pressing assembly 55 includes a swing plate 551, an elastic member 552, and a mating half sleeve 553. The swing plate 551 is rotatably connected to the upper end of the column 54; the elastic member 552 is connected to the plate surface of the swing plate 551 and extends perpendicular to the plate surface of the swing plate 551; the mating half sleeve 553 is connected to the extended end of the elastic member 552. The mating half sleeve 553 is arranged in the receiving groove 541 and can move up and down along the receiving groove 541 with the shaft end.

[0080] In this embodiment, in order to prevent the coiling roll 53 and the tensioning roll 52 from slipping during the rolling cooperation and affecting the coiling operation of the stainless steel strip 9, a pressing assembly 55 is also provided at the top of the column 54. The elastic member 552 on the swing plate 551 can provide a certain pressing force to the mating half sleeve 553. The mating half sleeve 553 is rotationally matched with the circumferential rotation of the coiling roll 53, forming a certain downward pressure on the shaft end, ensuring the effective contact between the circumferences of the coiling roll 53 and the tensioning roll 52, ensuring the driving effect of the tensioning roll 52 on the coiling roll 53, improving the coiling quality, and ensuring the coiling efficiency.

[0081] Based on the same inventive concept, the embodiment of the present application also provides a rolling and sandblasting method for an ultra-thin stainless steel strip 9. The rolling and sandblasting method for the ultra-thin stainless steel strip 9 includes the following steps:

[0082] S100: Select a stainless steel blank with a thickness of 2.5 mm as the raw material according to the type, hardness, and thickness requirements of the preset product;

[0083] S200: Feed the stainless steel blank into the rough rolling device 1 for 7 passes of rolling to obtain a stainless steel strip blank with a thickness of 0.5 mm. During the cold rolling process, the rolling speed is 1050 m / min, the unit tension is 300 N / mm, cold rolling oil is used for lubrication during rolling, and the temperature of the rolling oil is 40 °C;

[0084] S300: Feed the stainless steel strip blank into the cleaning tank 11 to wash off the cold rolling lubricating oil, and then feed the stainless steel strip blank into the first annealing furnace 12 for annealing. The temperature of the heating section is 1120 °C, the temperature of the cooling section is 550 °C, and the speed of the stainless steel strip blank in the annealing furnace is 130 m / min;

[0085] S400: Feed the stainless steel strip blank into the finish rolling device 2 and perform 5 passes of rolling to obtain a stainless steel strip 9 with a thickness of 0.1 mm. During the cold rolling process, the rolling speed is 400 m / min, the unit tension is 200 N / mm, and cold rolling oil is used for lubrication during rolling, and the temperature of the rolling oil is 38 °C;

[0086] S500: After feeding the stainless steel strip 9 into the treatment tank 21 for degreasing treatment, feed the stainless steel strip 9 into the second annealing furnace 22 for annealing. The temperature of the heating section is 1050 °C, the temperature of the cooling section is 80 °C, and the speed of the steel strip in the annealing furnace is 200 m / min;

[0087] S600: Perform stretch leveling treatment on the stainless steel strip 9 at an elongation rate of 0.5%;

[0088] S700: Feed the stainless steel strip 9 into the sandblasting device 4. The first sandblasting nozzle 71 sprays sand grains onto the first surface 91 of the stainless steel strip 9. The stainless steel strip 9 is reversed under the action of the reversing roller 43, and the second sandblasting nozzle 72 sprays sand grains onto the second surface 92 of the stainless steel strip 9 to complete the sandblasting operation;

[0089] S800: Under the action of the guiding roller 45, feed the stainless steel strip 9 into the coiling device 5 to complete the coiling operation.

[0090] Compared with the prior art, the ultra-thin stainless steel strip 9 rolling and sandblasting method provided by this embodiment uses the rough rolling device 1 and the finish rolling device 2 to perform two rolling operations on the stainless steel blank to obtain the stainless steel strip 9. During this process, annealing treatments are respectively performed using the first annealing furnace 12 and the second annealing furnace 22 to ensure the forming quality of the stainless steel strip 9. Then, the sandblasting device 4 sequentially performs sandblasting operations on the first surface 91 and the second surface 92 of the stainless steel strip 9. Combined with the settings of the upper pressure roller 42 and the lower pressure roller 44, the sand grains on the first surface 91 and the second surface 92 of the stainless steel strip 9 can be effectively fixed, ensuring the surface quality of the stainless steel strip 9. Then, the coiling device 5 is used to coil the stainless steel strip 9 into a roll, realizing the integration of the production process of the stainless steel strip 9, facilitating the reduction of labor intensity and the improvement of production efficiency.

[0091] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Ultra-thin stainless steel strip rolling and sandblasting equipment, characterized in that, It includes a rough rolling device, a first annealing furnace, a finish rolling device, a second annealing furnace, a tension leveling device, a sandblasting device and a coiling device which are connected in sequence. A cleaning pool for cleaning the cold rolling lubricating oil on the surface of the stainless steel billet is provided between the rough rolling device and the first annealing furnace, and a treatment pool for degreasing the stainless steel strip is provided between the finish rolling device and the second annealing furnace; The sandblasting device includes: A machine body with a feed hopper for accommodating sand grains at the top. The lower end of the feed hopper is provided with a first sandblasting nozzle and a second sandblasting nozzle. The bottom of the machine body is provided with a lower opening, and a guiding roller for guiding the stainless steel strip into the lower opening is arranged in the machine body; An upper pressure roller rotatably connected in the machine body. The upper pressure roller is located above the stainless steel strip and is used to press against the first surface of the stainless steel strip to fix the sand grains; A reversing roller rotatably connected to the outlet end of the machine body, which is used to reverse the stainless steel strip so that the second surface of the stainless steel strip is located above the first surface; A lower pressure roller rotatably connected in the machine body. The lower pressure roller is located above the stainless steel strip and is used to press against the second surface of the stainless steel strip to fix the sand grains; Wherein, the first sandblasting nozzle is used to spray sand grains onto the first surface of the stainless steel strip, and the second sandblasting nozzle is used to spray sand grains onto the second surface of the stainless steel strip. In the running direction of the stainless steel strip, both the first sandblasting nozzle and the second sandblasting nozzle are located between the upper pressure roller and the lower pressure roller; Two groups of floating components are also arranged in the machine body. The two groups of floating components are respectively located below the upper pressure roller and the lower pressure roller to support the stainless steel strip. Each group of floating components respectively includes: A floating support plate which is slidably matched with the machine body in the vertical direction and can move up and down to cooperate with the upper pressure roller or the lower pressure roller to press against the first surface or the second surface of the stainless steel strip respectively; A top support cam. The main shaft is rotatably connected to the inner wall of the machine body in the horizontal direction. The top support cam is connected with a rotation driving part. The top support cam is supported below the floating support plate and is used to abut against the bottom wall of the floating support plate to drive the floating support plate to move up and down; Wherein, a torque sensor capable of monitoring the torque parameter of the top support cam is arranged at the end of the top support cam. The torque sensor is electrically connected with a controller. The torque sensor can send the torque parameter to the controller, and the controller is electrically connected with the rotation driving part and is used to send a rotation action instruction to the rotation driving part.

2. The ultra-thin stainless steel strip rolling and sandblasting equipment according to claim 1, characterized in that, Four top support cams are arranged below the same floating support plate, and the four top support cams are respectively located below the four corners of the floating support plate.

3. The ultra-thin stainless steel strip rolling and sandblasting equipment according to claim 2, characterized in that, The rotation driving part is a bidirectional motor capable of driving the top support cam in both forward and reverse directions. The bidirectional motor is a double-output shaft motor. Two bidirectional motors are arranged below the same floating support plate, and the two output shafts of the same bidirectional motor are respectively connected with two coaxially arranged top support cams.

4. The ultra-thin stainless steel strip rolling and sandblasting equipment according to claim 1, characterized in that, The first sandblasting nozzle is connected to the lower end of the feed hopper through a riser pipe. There are two second sandblasting nozzles, which are respectively connected to the lower part of the feed hopper through two bent pipes located on both sides of the riser pipe. The bent pipes extend downward above the second surface of the stainless steel strip and bend and incline toward the side close to the central axis of the stainless steel strip.

5. The ultra-thin stainless steel strip rolling and sandblasting equipment according to claim 1, characterized in that, Cooling devices are respectively arranged on the first annealing furnace and the second annealing furnace. The cooling device includes: A cooling box is arranged in the middle of the extension direction of the first annealing furnace or the second annealing furnace. The first annealing furnace or the second annealing furnace penetrates through the cooling box. A cooling interlayer is arranged on the peripheral wall of the cooling box; A plurality of spray nozzles are respectively arranged on both sides of the first annealing furnace or the second annealing furnace, and are used for spraying the stainless steel strip to cool down the stainless steel strip.

6. The ultra-thin stainless steel strip rolling and sandblasting equipment according to any one of claims 1-5, characterized in that, The coiling device includes: A bracket is arranged below the lower opening; A tensioning roller is rotatably connected above the bracket and is located on the side of the import end of the lower opening away from the machine body; A coiling roller is rotatably arranged above the bracket and is slidably connected to the bracket in the vertical direction. The coiling roller is located above the tensioning roller and is in rolling cooperation with the tensioning roller, and is used for coiling the stainless steel strip on the tensioning roller.

7. The ultra-thin stainless steel strip rolling and sandblasting equipment according to claim 6, characterized in that, Two upright columns extending upward are arranged on the bracket. A receiving groove extending in the vertical direction and opening upward is arranged at the top of the upright column. Both ends of the coiling roller have shaft ends rotatably connected in the receiving groove, and the shaft ends are slidably connected in the receiving groove in the vertical direction.

8. The ultra-thin stainless steel strip rolling and sandblasting equipment according to claim 7, characterized in that, A pressing component for elastically pressing the shaft end is hinged to the top of the upright column. The pressing component includes: A swing plate is rotatably connected to the upper end of the upright column; An elastic member is connected to the plate surface of the swing plate and extends perpendicular to the plate surface of the swing plate; A mating half sleeve is connected to the outer extending end of the elastic member. The mating half sleeve is used to be arranged in the receiving groove and can move up and down along the receiving groove along with the shaft end.

9. A rolling and sandblasting method for an ultra-thin stainless steel strip, which uses the rolling and sandblasting equipment for an ultra-thin stainless steel strip as described in any one of claims 1-8, and is characterized in that, The method for rolling and sandblasting ultra-thin stainless steel strips includes the following steps: S100: According to the type, hardness and thickness requirements of the preset product, select a stainless steel blank with a thickness of 2 - 3.5 mm as the raw material; S200: Feed the stainless steel blank into the rough rolling device and perform 6 - 7 passes of rolling to obtain a stainless steel strip blank with a thickness of 0.3 - 0.8 mm. During the cold rolling process, the rolling speed is 800 - 1200 m / min, the unit tension is 200 - 400 N / mm, and cold rolling oil is used for lubrication during rolling. The temperature of the rolling oil is 35 - 45 °C; S300: Feed the stainless steel strip blank into a cleaning tank to wash off the cold rolling lubricating oil, and then feed the stainless steel strip blank into the first annealing furnace for annealing. The temperature of the heating section is 1100 - 1150 °C, and the temperature of the cooling section is 450 - 650 °C. The speed of the stainless steel strip blank in the annealing furnace is 120 - 150 m / min; S400: Feed the stainless steel strip blank into the finishing rolling device, and perform rolling for 4 - 5 passes to obtain a stainless steel strip with a thickness of 0.1 mm. During the cold rolling process, the rolling speed is 300 - 500 m / min, the unit tension is 150 - 300 N / mm, and cold rolling oil is used for lubrication during rolling, with the rolling oil temperature being 35 - 45°C; S500: After feeding the stainless steel strip into the treatment tank for degreasing treatment, feed the stainless steel strip into the second annealing furnace for annealing. The temperature of the heating section is 1000 - 1100°C, the temperature of the cooling section is 60 - 100°C, and the speed of the steel strip in the annealing furnace is 150 - 300 m / min; S600: Perform stretch leveling treatment on the stainless steel strip at an elongation rate of 0.25% - 0.7%; S700: Feed the stainless steel strip into the sandblasting device. The first sandblasting nozzle sprays sand grains onto the first surface of the stainless steel strip. The stainless steel strip changes direction under the action of the reversing roller, and the second sandblasting nozzle sprays sand grains onto the second surface of the stainless steel strip to complete the sandblasting operation; S800: Under the action of the guiding roller, feed the stainless steel strip into the coiling device to complete the coiling operation.

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