Identification method for defect delivery of steel coil

Abstract

The invention discloses an identification method for steel coil strip defect delivery. The method comprises the following steps: firstly, negotiating with a client to determine steel coil defect parameters; secondly, a defective coil identification label is arranged on the outer package of the steel coil; then a defect information label card is pasted in the steel coil; and finally, marking the upper surface and the lower surface of the defect position of the steel coil by adopting red grid lineation, and the method realizes full-process management of the defect coil by marking the outer package, the interior and the defect position through a multi-level marking system. According to the method, the problem that the contract delivery rate is affected due to the fact that the weight of a steel coil is not consistent due to strip steel defect cutting is solved, meanwhile, the defect position can be rapidly and accurately recognized, the machining efficiency is improved, the product yield and the contract delivery rate are remarkably improved, the production cost is reduced, and the win-win situation of purchase and sale is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of cold-rolled steel coil processing, and in particular to a method for marking defective steel coil delivery. Background Art

[0002] During the continuous annealing or hot-dip galvanizing process of cold-rolled strip, the continuous operation of the line requires a stable process speed. This makes it impossible to completely remove all quality defects online, necessitating rework. Depending on customer requirements, the delivery weight of the steel coil is generally 9-15 tons, which, based on a 0.65*1200mm specification, translates to approximately 1400-2500 meters.

[0003] Because strip processing involves multiple processes, including steelmaking, hot rolling, cold rolling, and galvanizing, surface defects are unavoidable. For automotive panels, surface quality requirements are even higher, requiring the removal of defects like incidental inclusions and zinc slag. Because defects are not fixed within the coil, there are cases where the coil cannot be separated into qualified weights after defect removal, leading to downgrades. In some cases, the resulting small coils are downgraded due to weight discrepancies. This downgrade, caused by rework to remove defects and resulting in weight discrepancies, directly impacts product quality, increasing production costs while also affecting contract delivery rates and disrupting downstream production schedules.

[0004] How to effectively mark defects in steel coils and deliver them with defects, so that the steel coils can be identified promptly and accurately when flowing to the next process, and defects can be easily picked out during processing. This will not only improve the product qualification rate, but also ensure the contract delivery rate, laying the foundation for the smooth production of the next process and achieving a win-win situation for both buyers and sellers. Summary of the Invention

[0005] The present invention aims to provide a method for identifying defective steel coil deliveries. By reaching a consensus with the user, this method effectively identifies steel coil defects and ensures defective steel coil deliveries. This method improves product qualification rates while ensuring accurate identification of defects, facilitating easy processing, and guaranteeing contract delivery rates, achieving a win-win situation for both buyers and sellers.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: A method for marking defective steel coils for delivery, the technical solution is as follows:

[0007] Step 1: Negotiate with the customer to determine the coil defect parameters, including defect types, maximum number of defects per coil, and identification method;

[0008] Step 2: Place a defective coil identification label on the outer packaging of the steel coil;

[0009] Step 3: Paste the defect information label card inside the steel coil;

[0010] Step 4: Mark the defect locations on the upper and lower surfaces of the steel coil with red grid lines.

[0011] It is further configured as follows: the defective roll identification label is a blue round self-adhesive label with a diameter of 50mm to 70mm, which is pasted on the side guard plates of the packaging on both sides of the steel coil.

[0012] It is further configured that: the blue circular self-adhesive label is a unique appearance identifier for distinguishing defective rolls from non-defective rolls in downstream processes.

[0013] It is further configured as follows: the defect information label card includes the following contents: defect type, defect quantity, defect location information and specification parameters of the corresponding steel coil.

[0014] It is further configured as follows: the defect information label card is made of waterproof material and is fixed in a conspicuous position on the inner packaging of the steel coil.

[0015] It is further configured that: the red grid line covers a range of up to 10 cm around the defect position and is marked on both sides.

[0016] It is further set that the number of defects per steel coil does not exceed three.

[0017] It is further configured that: the red grid lines are made of weather-resistant paint.

[0018] By adopting the above technical solution, the following beneficial effects are achieved:

[0019] This solution forms a defect management system covering the entire process through multi-level labeling on the outer packaging, interior, and defective parts of defective coils, ensuring that defective coils can be effectively identified during circulation and achieving defective delivery of steel coils. This not only improves the yield rate of the product, but also ensures the delivery rate of the contract, achieving a win-win situation for both buyers and sellers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the outer packaging of the steel coil in this embodiment;

[0021] Figure 2 This is a schematic diagram of the interior of the steel coil in this embodiment;

[0022] Figure 3 This is the defect information label card of this embodiment;

[0023] Figure 4 Schematic diagram of defect location in this embodiment. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] refer to Figures 1 to 4A method for marking defective steel coil delivery is provided, taking the defective steel coil delivery of a certain automobile main engine factory as an example, but the application of the present invention is not limited to this.

[0026] 1. Negotiate with the customer to determine the defect parameters

[0027] ① Defect types: including inclusions, zinc slag, scratches and other specific defect types;

[0028] ② Maximum number of defects per roll: For example, a maximum of 3 defects are allowed per roll;

[0029] ③ Identification method: including standardized requirements for outer packaging labels, internal information cards and defect location markings.

[0030] 2. Steel coil outer packaging mark

[0031] Paste blue round self-adhesive labels on the guard plates on both sides of the outer packaging of the steel coil. The specific parameters are as follows:

[0032] ①Size: 50mm to 70mm in diameter;

[0033] ② Position: symmetrically affixed to prominent positions on the guard plates on both sides of the steel coil;

[0034] ③Function: Serves as a unique external identifier to distinguish defective volumes from non-defective volumes when customers receive the goods.

[0035] 3. Steel coil internal defect information label card

[0036] A defect information label card is attached to the inside of the steel coil. The specific content and requirements are as follows:

[0037] ①Record defect tracking information (such as Figure 3 (as shown): including volume number, date, defect type, defect quantity, defect location (top or bottom, unrolling location, defect length, defect distance from edge), name and telephone number of person in charge;

[0038] ② Label format: Use standardized form to ensure that the information is clear and easy to read (such as attached Figure 3 As shown), record the defect tracking information in the form;

[0039] ③ Paste position: fixed in a conspicuous position on the inner packaging of the steel coil to avoid falling off during transportation (such as Figure 2 shown).

[0040] 4. Defect location marking

[0041] Red grid lines are used to mark the defect locations on the upper and lower surfaces of the steel coil. The specific requirements are as follows:

[0042] ① Marking method: Use weather-resistant red paint to draw grid marks along the edge of the defect. The grid size is 300mm×100mm and the marking width is 2cm.

[0043] ② Coverage: The mark should cover the defect area and the surrounding 10cm range to ensure easy identification during processing (such as attached Figure 4 shown);

[0044] ③ Double-sided marking: marking must be done simultaneously on the top and bottom.

[0045] Through the above-mentioned marking method, the defective steel coils can achieve the following technical effects: defective steel coils can be quickly and accurately identified during circulation, the steel coil blanking process is convenient to operate, the contract delivery rate is guaranteed, the product qualification rate is improved, and a win-win situation for both buyers and sellers is achieved.

[0046] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A method for marking defective steel coils, characterized by: The following steps are involved: Step 1: Negotiate with the customer to determine the coil defect parameters, including defect types, maximum number of defects per coil, and identification method; Step 2: Place a defective coil identification label on the outer packaging of the steel coil; Step 3: Paste the defect information label card inside the steel coil; Step 4: Mark the defect locations on the upper and lower surfaces of the steel coil with red grid lines.

2. The method for marking defective steel coil delivery according to claim 1, characterized in that: The defective coil identification label is a blue round self-adhesive label with a diameter of 50mm to 70mm, which is pasted on the side guard plates of the packaging on both sides of the steel coil.

3. The method for marking defective steel coil delivery according to claim 2, characterized in that: The blue circular self-adhesive label is the only appearance identification for distinguishing defective rolls from non-defective rolls in downstream processes.

4. The method for marking defective steel coil delivery according to claim 1, characterized in that: The defect information label card includes the following contents: defect type, defect quantity, defect location information and specification parameters of the corresponding steel coil.

5. The method for marking defective steel coil delivery according to claim 4, characterized in that: The defect information label card is made of waterproof material and is fixed in a conspicuous position inside the packaging of the steel coil.

6. The method for marking defective steel coil delivery according to claim 1, characterized in that: The red grid lines cover a maximum of 10 cm around the defect location and are marked on both sides.

7. The method for marking defective steel coil delivery according to claim 1, characterized in that: The number of defects per coil shall not exceed three.

8. The method for marking defective steel coil delivery according to claim 1, characterized in that: The red grid lines are made of weather-resistant paint.

Images