Cold-rolled steel sheet and manufacturing method thereof

Abstract

The invention relates to the field of cold-roll steel plate manufacturing, in particular to a cold-roll steel plate and a manufacturing method thereof. According to the cold-roll steel sheet and the manufacturing method thereof, the cold-roll steel sheet can be adaptively lifted and supported when the cold-roll steel sheet is wound on one side, and therefore the wound cold-roll steel sheet is prevented from rolling over and slipping off. The method comprises the following steps that S1, produced cold-roll steel plates are in butt joint into a manufacturing device; s2, the cold-rolled steel plate is wound through a manufacturing device; s3, during winding, lifting and supporting the cold-rolled steel sheet subjected to winding work upwards; s4, the surface of the outer side of the wound cold-roll steel plate is sealed with a film; and S5, the edge parts are folded and attached to the edge parts of the two outer sides of the cold-roll steel sheet through a manufacturing device while the sealing film is wound, and the cold-roll steel sheet prepared through the method is prepared from, by weight, 1.5 parts of carbon, 45 parts of iron, 2.8 parts of manganese, 0.45 part of silicon, 0.12 part of phosphorus and 0.08 part of sulfur.

Description

Technical Field

[0001] This invention relates to the field of cold-rolled steel sheet manufacturing, and more specifically to a cold-rolled steel sheet and its manufacturing method. Background Technology

[0002] Cold-rolled steel is steel produced through cold rolling. Cold rolling involves further thinning No. 1 steel sheet to the target thickness at room temperature. Compared to hot-rolled steel sheets, cold-rolled steel sheets have more precise thickness, a smoother and more attractive surface, and various superior mechanical properties, especially in terms of machinability. Because cold-rolled coils are relatively brittle and hard, making them less suitable for processing, cold-rolled steel sheets typically require annealing, pickling, and surface leveling before being delivered to customers. The maximum thickness for cold-rolled steel is 0.1-8.0 mm, with most factories producing cold-rolled steel sheets below 4.5 mm. Minimum thickness and width are determined based on each factory's equipment capabilities and market demand.

[0003] In the existing cold-rolled steel sheet production process, such as the cold-rolled steel sheet and manufacturing method described in application number 202310795915.5, the steel sheet immersed in acid solution can be brushed to improve the pickling effect. However, it is not suitable for adaptively supporting the cold-rolled steel sheet when winding it on one side to prevent the wound cold-rolled steel sheet from tipping over and slipping. Summary of the Invention

[0004] The purpose of this invention is to provide a cold-rolled steel sheet and its manufacturing method, which can adaptively support the cold-rolled steel sheet during single-sided winding, thereby preventing the wound cold-rolled steel sheet from tipping over and slipping.

[0005] The objective of this invention is achieved through the following technical solution: a method for manufacturing cold-rolled steel sheets, the method comprising the following steps:

[0006] S1: Connect the produced cold-rolled steel sheet into the manufacturing unit;

[0007] S2: Cold-rolled steel sheet is wound using a manufacturing device;

[0008] S3: During winding, the cold-rolled steel sheet is lifted upwards to support the winding operation;

[0009] S4: Seal the outer surface of the wound cold-rolled steel sheet with a film;

[0010] S5: While the sealing film is being wound, the edges are folded and bonded to the outer two sides of the cold-rolled steel sheet using a manufacturing device.

[0011] The manufacturing device includes a manufacturing frame, a rotating rod rotatably connected to the upper side of the manufacturing frame, a winding frame fixedly connected to the rear side of the rotating rod, a lifting plate slidably connected to the lower side of the manufacturing frame, and a movable end of a telescopic rod fixedly connected to the front and rear sides of the bottom of the lifting plate, with the fixed ends of the two telescopic rods fixedly connected to the front and rear sides of the bottom of the manufacturing frame, respectively.

[0012] The winding frame is provided with multiple crossbars evenly distributed along the circumference.

[0013] The upper surface of the support plate is polished.

[0014] Each of the telescopic rods is fitted with a spring, and the two springs are fixedly connected to the front and rear sides of the bottom of the lifting plate and the front and rear sides of the bottom of the manufacturing frame, respectively.

[0015] The cold-rolled steel sheet prepared by the above method is composed of the following raw materials in parts by weight: 1.5 parts carbon, 45 parts iron, 2.8 parts manganese, 0.45 parts silicon, 0.12 parts phosphorus and 0.08 parts sulfur. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 This is a schematic diagram of the process flow of a cold-rolled steel sheet manufacturing method according to the present invention;

[0018] Figure 2 This is a partial structural schematic diagram of the manufacturing frame of the present invention;

[0019] Figure 3 This is a partial structural schematic diagram of the winding frame of the present invention;

[0020] Figure 4 This is a partial structural schematic diagram of the support plate of the present invention;

[0021] Figure 5 This is a partial structural schematic diagram of the telescopic rod of the present invention;

[0022] Figure 6 This is a partial structural schematic diagram of the transverse moving frame of the present invention;

[0023] Figure 7 This is a partial structural schematic diagram of the crossbar of the present invention;

[0024] Figure 8 This is a partial structural schematic diagram of the long frame of the present invention;

[0025] Figure 9 and 10 These are all schematic diagrams of the overall structure of the present invention.

[0026] In the figure: manufacturing frame 101; rotating rod 102; winding frame 103; lifting plate 201; telescopic rod 202; spring 203; transverse frame 301; discharge roller 302; crossbar 401; winding roller 402; long strip frame 501; right angle frame 502; arc-shaped seat 503. Detailed Implementation

[0027] A method for manufacturing cold-rolled steel sheet, the method comprising the following steps:

[0028] S1: Connect the produced cold-rolled steel sheet into the manufacturing unit;

[0029] S2: Cold-rolled steel sheet is wound using a manufacturing device;

[0030] S3: During winding, the cold-rolled steel sheet is lifted upwards to support the winding operation;

[0031] S4: Seal the outer surface of the wound cold-rolled steel sheet with a film;

[0032] S5: While the sealing film is being wound, the edges are folded and bonded to the outer two sides of the cold-rolled steel sheet using a manufacturing device.

[0033] This section is based on Figure 1-5The working process described in sections 9 and 10 is as follows: To facilitate adaptive support of the cold-rolled steel sheet during single-sided winding, thereby preventing the rolled cold-rolled steel sheet from tipping over and slipping, a rotating rod 102 is rotatably connected to the upper side of the manufacturing frame 101. A winding frame 103 for winding the cold-rolled steel sheet is bolted to the rear side of the rotating rod 102. The front side of the rotating rod 102 is fixedly connected to the output shaft of a motor via a coupling. The motor is bolted to the upper side of the front side of the manufacturing frame 101. Driving the motor causes the rotating rod 102 to rotate the winding frame 103, thereby uniformly winding the cold-rolled steel sheet mated to the surface of the winding frame 103. The rear side of the winding frame 103 is not obstructed. After winding the cold-rolled steel sheet on the winding frame 103, the wound cold-rolled steel sheet can be directly wound along the winding frame 103. The cold-rolled steel sheet is removed from the rear side. When the cold-rolled steel sheet is wound on the winding frame 103, the rotating rod 102 and the winding frame 103 will be subjected to greater force due to the weight of the cold-rolled steel sheet. Therefore, a support plate 201 is slidably connected to the lower side of the manufacturing frame 101. The movable end of a telescopic rod 202 is fixedly connected to the front and rear sides of the bottom of the support plate 201, and the fixed ends of the two telescopic rods 202 are fixedly connected to the front and rear sides of the bottom of the manufacturing frame 101, so that the upper side of the support plate 201 slides and contacts the lower surface of the cold-rolled steel sheet being wound. With the support of the telescopic rods 202 on both sides of the bottom, the support plate 201 can adaptively support the cold-rolled steel sheet when winding it on one side, thereby preventing the wound cold-rolled steel sheet from tipping over and slipping. The structure is simple and easy to use, which reduces the production cost of cold-rolled steel sheet production in small factories.

[0034] This section is based on Figure 1-5 The working process described in paragraphs 9 and 10 is as follows: multiple crossbars are fixedly connected along the circumferential direction on the winding frame 103 by welding, so as to provide stable support for the wound cold-rolled steel sheet through the multiple crossbars.

[0035] This section is based on Figure 1-5 The working process described in 9 and 10 is to polish the upper surface of the lifting plate 201 so that the surface of the cold-rolled steel plate will not be worn when the cold-rolled steel plate is wound.

[0036] This section is based on Figure 1-5 The working process described in paragraphs 9 and 10 is as follows: with the two telescopic rods 202 as limits, in order for the two telescopic rods 202 to provide support force to the lifting plate 201, the expansion force of the spring 203 on each telescopic rod 202 facilitates the support force of the lifting plate 201 during the winding of the cold-rolled steel plate, and the two telescopic rods 202 extend and retract accordingly with the diameter of the cold-rolled steel plate being wound, so as to maintain contact with the cold-rolled steel plate at all times and provide a stable support force.

[0037] A crossbar 401 is rotatably connected to the top left side of the manufacturing frame 101, and a winding roller 402 is fixedly connected to the middle of the crossbar 401.

[0038] A transverse frame 301 is slidably connected to the top left side of the manufacturing frame 101, and a discharge roller 302 is rotatably connected to the upper side of the transverse frame 301.

[0039] This section is based on Figure 1-7 The working process described in sections 9 and 10 is as follows: To facilitate the wrapping and sealing of the outer surface of the cold-rolled steel sheet during winding, a crossbar 401 is rotatably connected to the top left side of the manufacturing frame 101. A winding roller 402 is fixedly connected to the middle of the crossbar 401. Plastic wrap is fixedly wrapped on the winding roller 402. During the wrapping and sealing process, the plastic wrap wrapped on the winding roller 402 is pulled out and attached to the discharge roller 302 from the lower side. At this time, the lower side of the transverse frame 301 is fixedly connected to the movable end of the first electric push rod via a flange, and the fixed end of the first electric push rod is fixed via a flange. The upper left side of the manufacturing frame 101 is fixedly connected to the first electric push rod, which drives the transverse frame 301 to move laterally. As a result, the movable end of the plastic wrap on the discharge roller 302 adheres to the wound cold-rolled steel plate coil. When the cold-rolled steel plate coil rotates, the plastic wrap automatically wraps around the cold-rolled steel plate coil, which facilitates the wrapping and sealing of the outer surface of the cold-rolled steel plate during winding. The width of the plastic wrap wrapped on the winding roller 402 is greater than the width of the cold-rolled steel plate, so that the excess plastic wrap on both sides can be attached to the two side edges of the cold-rolled steel plate coil to prevent the sharp parts of the steel plate coil from scratching the operators.

[0040] The top of the transverse frame 301 is slidably connected to a long frame 501, and a right-angle frame 502 is fixedly connected to the front and rear sides of the long frame 501 respectively. An arc-shaped seat 503 is fixedly connected to the right side of each right-angle frame 502.

[0041] This section is based on Figure 1-10 The working process described is as follows: To facilitate the application of excess plastic wrap on both sides to the edges of the cold-rolled steel plate coil, preventing the sharp edges of the steel plate coil from scratching the operators, a flange is fixedly connected to the movable end of a second electric push rod on the rear side of the long frame 501. The fixed end of the second electric push rod is fixedly connected to the rear side of the transverse frame 301 via a flange. Driving the second electric push rod causes the long frame 501 to slide towards the coiled steel plate. Consequently, the arc-shaped seats 503 on each right-angle frame 502 use the upper and lower sides of each arc-shaped seat 503 to smoothly apply the excess plastic wrap on both sides to the edges of the cold-rolled steel plate coil while it is being coiled, preventing the sharp edges of the steel plate coil from scratching the operators. The structure is simple and easy to use.

[0042] The two arc-shaped seats 503 are mirrored.

[0043] This section is based on Figure 1-10 The working process described is as follows: the two arc-shaped seats 503 are mirrored to facilitate pressing and fitting of the plastic wrap from both sides.

[0044] The cold-rolled steel sheet prepared by the above method is composed of the following raw materials in parts by weight: 1.5 parts carbon, 45 parts iron, 2.8 parts manganese, 0.45 parts silicon, 0.12 parts phosphorus and 0.08 parts sulfur.

Claims

1. A method for manufacturing cold-rolled steel sheet, characterized in that, The method includes the following steps: S1: Connect the produced cold-rolled steel sheet into the manufacturing unit; S2: Cold-rolled steel sheet is wound using a manufacturing device; S3: During winding, the cold-rolled steel sheet is lifted upwards to support the winding operation; S4: Seal the outer surface of the wound cold-rolled steel sheet with a film; S5: While the sealing film is being wound, the edges are folded and bonded to the outer two sides of the cold-rolled steel sheet using a manufacturing device.

2. The method according to claim 1, characterized in that: The manufacturing device includes a manufacturing frame (101), a rotating rod (102) is rotatably connected to the upper side of the manufacturing frame (101), a winding frame (103) is fixedly connected to the rear side of the rotating rod (102), a lifting plate (201) is slidably connected to the lower side of the manufacturing frame (101), and the movable ends of a telescopic rod (202) are fixedly connected to the front and rear sides of the bottom of the lifting plate (201), respectively. The fixed ends of the two telescopic rods (202) are fixedly connected to the front and rear sides of the bottom of the manufacturing frame (101).

3. The method according to claim 2, characterized in that: The winding frame (103) is provided with multiple crossbars evenly distributed along the circumferential direction.

4. The method according to claim 3, characterized in that: The upper surface of the support plate (201) is polished.

5. The method according to claim 4, characterized in that: Each of the telescopic rods (202) is fitted with a spring (203), and the two springs (203) are fixedly connected to the front and rear sides of the bottom of the lifting plate (201) and the front and rear sides of the bottom of the manufacturing frame (101), respectively.

6. The method according to claim 5, characterized in that: A crossbar (401) is rotatably connected to the top left side of the manufacturing frame (101), and a winding roller (402) is fixedly connected to the middle of the crossbar (401).

7. The method according to claim 6, characterized in that: The manufacturing frame (101) is slidably connected to the top left side of the transverse frame (301), and the upper side of the transverse frame (301) is rotatably connected to the discharge roller (302).

8. The method according to claim 7, characterized in that: The top of the transverse frame (301) is slidably connected to a long frame (501), and a right-angle frame (502) is fixedly connected to the front and rear sides of the long frame (501), and an arc-shaped seat (503) is fixedly connected to the right side of each right-angle frame (502).

9. The method according to claim 8, characterized in that: The two arc-shaped seats (503) are mirror-set.

10. The cold-rolled steel sheet prepared by the method according to any one of claims 1-9, characterized in that, The cold-rolled steel sheet is composed of the following raw materials in parts by weight: 1-1.5 parts carbon, 30-45 parts iron, 1.5-2.8 parts manganese, 0.2-0.45 parts silicon, 0.1-0.12 parts phosphorus and 0.05-0.08 parts sulfur.

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