Zinc alloy shell production process

Abstract

The invention relates to a zinc alloy shell production process in the technical field of shell production. The zinc alloy shell production process comprises the steps of S1, die casting, S2, water gap picking, S3, deburring, S4, T groove fine carving, S5, sand blasting, S6, electroplating, S7, drilling, S8, tapping, S9, full inspection, S10, packaging and S11, warehousing. According to the process, a standardized process is adopted, and the effect of ensuring the product quality can be achieved through the systematized production process; and comprehensive inspection is carried out after all procedures are completed, it is ensured that each product meets the high-standard quality requirement, the risk that defective products flow into the market is reduced, it is ensured that the products are not damaged in the transportation and storage process and are kept in the optimal state through strict packaging and warehousing management, and the product quality is improved. According to the technological process, the defects and outgoing steps of an existing technological process are overcome, the situation that management errors are caused or the process duration is increased is reduced, and the risk of process breakage is reduced while the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of shell production, and in particular to a zinc alloy shell production process. Background Art

[0002] Zinc alloy housing is a shell or frame structure made of zinc alloy material, which is widely used in electronic equipment, automotive parts, home appliances, etc. Zinc alloy is an ideal choice for manufacturing various precision housings due to its good mechanical properties, casting properties and surface treatment characteristics.

[0003] The existing referenceable Chinese patent with announcement number CN114134356A discloses a zinc alloy production process. The zinc alloy production process mainly includes the following steps: (S1) melting zinc material into zinc liquid; (S2) adding alloy element metal to zinc liquid and melting into alloy zinc liquid; (S3) keeping the alloy zinc liquid warm and casting it into zinc alloy ingot. The zinc alloy production process has a simple and easy melting process, does not require special slag making and degassing treatment, and does not require the use of special covering agents; the melting equipment has a wide range of uses; the melting speed is fast, the melting efficiency is high, and the energy consumption is low; the melting process can effectively avoid segregation and impurities; the element content in the product is precisely controlled, the shape is regular, and there is no pore inside; the production process is safe and harmless, and easy to operate.

[0004] Although this patent has the effect of electroplating, its process flow is not complete. The steps and operating techniques of the subsequent processes need to be standardized. When process management is required and completed in a specific installation environment, such as a process environment that needs to meet the standards of fine carving and sandblasting, since the process does not have standardized process management, some processes need to be outsourced when coordinating the processes, which increases the occurrence of management errors or increases the process time. The process flow also needs to be further processed and improved to make it more perfect, which increases the number of processes and reduces work efficiency. For this reason, the inventors have proposed a zinc alloy shell production process to solve the above-mentioned technical problems. Summary of the invention

[0005] In order to overcome the above-mentioned shortcomings, the invention aims to provide a technical solution that can solve the above-mentioned problems.

[0006] A zinc alloy shell production process, the process comprising the following steps:

[0007] S1: Die casting, design the mold according to the product requirements and use steel to make the mold. The mold should have durability and thermal stability. Before die casting, the mold needs to be preheated to an appropriate temperature to prevent defects caused by cold start, and then prepare the die casting machine to assist in molding;

[0008] S2: Remove the water outlet. Before removing the water outlet, first conduct a comprehensive inspection of the die-cast zinc alloy shell to confirm that there are no obvious defects such as pores and cracks. Then, according to the structure and gate position of the product, select the appropriate cutting equipment, use calipers and micrometers to check the key dimensions to ensure that they meet the design requirements. At the same time, check whether there are any missing gates or burrs on the surface to facilitate supplementary trimming;

[0009] S3: Remove the burrs. According to the structure of the product and the location and size of the burrs, use a hand file, grinder, CNC cutting equipment, grinder or polisher to perform preliminary removal. The burrs should be gradually changed from coarse to fine until the surface is smooth and flat. Use appropriate detergent to clean the product to remove metal chips and oil stains generated during the trimming process to ensure the surface is clean. Place the cleaned zinc alloy shell in a well-ventilated place to dry naturally, or use drying equipment to accelerate the drying process.

[0010] S4: Carve T-slots. Determine the position, size and depth of the T-slots according to the product drawings or CAD models, ensure that the design meets the functional requirements, and confirm that its specifications and quality meet the standards. Use computer-aided manufacturing software to write the processing program and define the cutting path, feed speed and speed parameters.

[0011] S5: Sandblasting, determine the specific parameters of sandblasting, abrasive type, particle size, spray pressure, ice confirm that the zinc alloy shell has passed the preliminary processing, complete the inspection and cleaning, use a detergent to clean the surface of the zinc alloy shell, remove oil, dust and pollutants, ensure the surface is clean, turn on the sandblasting machine, start sandblasting the zinc alloy shell, and slowly move the spray gun according to the predetermined path to make the abrasive evenly cover the entire workpiece surface to avoid omission or excessive spraying;

[0012] S6: Electroplating: Determine the specific parameters of electroplating, including the type, thickness and color of the coating according to the product requirements. The coating types include chromium, nickel or silver. According to the required coating type, prepare the corresponding chromate solution, nickel sulfate solution or cyanide solution electroplating solution. The current density is 0.5-5A / dm2.

[0013] S7: Drilling. The zinc alloy shell is firmly mounted on the drilling machine workbench. A fixture is used to ensure its stability and precise position. The position of the drill bit is calibrated by a laser tool setting instrument or manual tool setting to ensure that the starting point of the drilling is accurate. A speed of 1000-3000rpm and a feed speed of 100-150mm / min are used. A smaller diameter drill bit is used for pre-drilling to form a guide hole. The drill bit diameter is gradually increased to finally reach the designed hole diameter to ensure that the hole wall is smooth and flat.

[0014] S8: Tapping, select carbide or high-speed steel taps according to the specifications, prepare an appropriate amount of coolant or lubricant to reduce the cutting temperature and friction heat, and take away the chips to prevent accumulation and affect the tapping accuracy. At the same time, use compressed air or a brush to remove the chips remaining during the drilling process to ensure that the hole is clean. Insert the tap into the tapping wrench and ensure that it is perpendicular to the workpiece surface. The tap gradually enters the hole. After each turn, rotate in the opposite direction for about 1 / 4 turn to break and remove chips;

[0015] S9: Full inspection: Place the products neatly in the mold blister box, and conduct appearance inspection, logo inspection, size inspection, thread inspection, assembly test, sealing test and surface treatment inspection respectively. After passing the inspection, proceed to the next process;

[0016] S10: Packaging, prepare the product drawings, packaging specifications and related technical documents, ensure that the packaging personnel are familiar with the packaging requirements, use compressed air or a soft brush to remove dust, chips and impurities on the surface of the zinc alloy shell to ensure that the surface is clean and tidy, and then apply anti-rust oil on the surface to prevent oxidation and rust. Wrap the sandblasted surface of the zinc alloy shell with anti-rust paper to further enhance the anti-rust effect. Wrap each zinc alloy shell separately with a plastic bag or anti-static bag to prevent scratches and static damage, and affix labels with product name, specifications, production date, batch number and other information for easy management and traceability;

[0017] S11: Warehouse entry: confirm that the warehouse environment meets the requirements for storing zinc alloy shells, including temperature, humidity control, and cleanliness. Check whether the shelves are stable and whether the labels are clear. According to the warehouse entry form and packing list, check the quantity, specifications, batch number, and production date of the products to ensure that they are correct. Randomly select some products for quality review, including dimensional accuracy, surface quality, and functional testing. After confirmation, they are put into storage.

[0018] Furthermore, in S1, the mold is preheated to an appropriate temperature of 150°C-250°C.

[0019] Furthermore, in S2, the cutting equipment includes shears, files, grinders, and CNC cutting machines.

[0020] Furthermore, in S3, the natural drying time is 10-24 hours, and the temperature of the drying equipment for accelerated drying is 100° C.-134° C.

[0021] Furthermore, in S4, the cutting path is a continuous line of point segments, the feed speed is 100 mm / min, and the rotation speed is 900 R / S.

[0022] Furthermore, in S5, the abrasive particle size is 80 mesh-240 mesh, and the sandblasting pressure is between 0.3-0.7 MPa.

[0023] Furthermore, in S6, the temperature of the electroplating solution is between 20°C and 60°C.

[0024] Furthermore, in S8, the tapping is performed at a rotation speed of 500-1500 rpm and a feed depth of 50-70 mm / min.

[0025] Compared with the prior art, the invention has the following beneficial effects: the process adopts a standardized process, and each step from die-casting to warehousing has its specific purpose and effect. Through this systematic production process, the effect of ensuring product quality can be achieved;

[0026] The excess metal parts are removed through processes such as water removal (S2) and burr removal (S3), which reduces surface defects and improves appearance quality. The introduction of CNC equipment in processes such as T-slot carving (S4), drilling (S7) and tapping (S8) realizes automation and standardized operation, reduces human errors and speeds up production.

[0027] Precision-carved T-slots (S4) provide precise installation positions for subsequent assembly, enhancing the functionality of the product; electroplating (S6) improves the corrosion resistance and service life of the product, increasing added value; and sandblasting (S5) removes impurities such as oxide layers and burrs, while improving surface roughness, providing a good foundation for subsequent treatments such as painting or electroplating.

[0028] Full inspection (S9) is carried out after all processes are completed to ensure that each product meets high quality standards and reduces the risk of defective products entering the market. Packaging and warehousing (S10, S11) ensure that the products are not damaged during transportation and storage and remain in the best condition through strict packaging and warehousing management. This process improves the defects and outsourcing steps of the existing process, reduces the occurrence of management errors or increases in process time, improves work efficiency, and reduces the risk of process interruption. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a process flow chart of a zinc alloy shell production process. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] For this example, please refer to Figure 1 , a zinc alloy shell production process is specifically implemented, and the process includes the following steps:

[0032] S1: Die casting, design the mold according to the product requirements, and use steel to make the mold. The mold should have durability and thermal stability. Before die casting, the mold needs to be preheated to an appropriate temperature to prevent defects caused by cold start, and then prepare the die casting machine to assist in molding. The mold is preheated to an appropriate temperature of 150℃-250℃;

[0033] S2: Remove the water outlet. Before removing the water outlet, first conduct a comprehensive inspection of the die-cast zinc alloy shell to confirm that there are no obvious defects such as pores and cracks. Then, according to the structure of the product and the location of the gate, select the appropriate cutting equipment, use calipers and micrometers to check the key dimensions to ensure that they meet the design requirements. At the same time, check whether there are any missing gates or burrs on the surface for supplementary trimming. The cutting equipment includes shears, files, grinders, and CNC cutting machines;

[0034] S3: Remove the burrs. According to the structure of the product and the location and size of the burrs, use a manual file, grinder, CNC cutting equipment, grinder or polisher to perform preliminary removal. The burrs are gradually transitioned from coarse to fine until the surface is smooth and flat. Use appropriate detergent to clean the product to remove metal chips and oil stains generated during the trimming process to ensure that the surface is clean. Place the cleaned zinc alloy shell in a well-ventilated place to dry naturally, or use a drying equipment to accelerate the drying process. The natural drying time is 10-24 hours, and the temperature of the drying equipment to accelerate drying is 100℃-134℃;

[0035] S4: Carve T-slots. Determine the position, size and depth of the T-slots according to the product drawings or CAD models, ensure that the design meets the functional requirements, and confirm that its specifications and quality meet the standards. Use computer-aided manufacturing software to write the processing program and define the cutting path, feed speed and speed parameters. The cutting path is a continuous line of point segments, the feed speed is 100mm / min, and the speed is 900R / S.

[0036] S5: Sandblasting, determine the specific parameters of sandblasting, abrasive type, particle size, spray pressure, ice confirm that the zinc alloy shell has passed the preliminary processing, complete the inspection and cleaning, use a detergent to clean the surface of the zinc alloy shell, remove oil, dust and pollutants, ensure the surface is clean, turn on the sandblasting machine, start sandblasting the zinc alloy shell, slowly move the spray gun according to the predetermined path, so that the abrasive evenly covers the entire workpiece surface, avoid omission or excessive spraying, the abrasive particle size is 80 mesh-240 mesh, and the sandblasting pressure is between 0.3-0.7MPa;

[0037] S6: Electroplating: Determine the specific parameters of electroplating according to product requirements, including the type, thickness and color of the coating. The coating types include chromium, nickel or silver. According to the required coating type, prepare the corresponding chromate solution, nickel sulfate solution or cyanide solution electroplating solution. The current density is 0.5-5A / dm 2, the temperature of the plating solution is between 20℃-60℃;

[0038] S7: Drilling. The zinc alloy shell is firmly mounted on the drilling machine workbench. A fixture is used to ensure its stability and precise position. The position of the drill bit is calibrated by a laser tool setting instrument or manual tool setting to ensure that the starting point of the drilling is accurate. A speed of 1000-3000rpm and a feed speed of 100-150mm / min are used. A smaller diameter drill bit is used for pre-drilling to form a guide hole. The drill bit diameter is gradually increased to finally reach the designed hole diameter to ensure that the hole wall is smooth and flat.

[0039] S8: Tapping, select carbide or high-speed steel taps according to the specifications, prepare an appropriate amount of coolant or lubricant to reduce the cutting temperature and friction heat, and take away the chips to prevent accumulation and affect the tapping accuracy. At the same time, use compressed air or a brush to remove the chips remaining during the drilling process to ensure that the hole is clean. Insert the tap into the tapping wrench and ensure that it is perpendicular to the workpiece surface. The tap gradually enters the hole. After each turn, rotate in the opposite direction for about 1 / 4 turn to break and remove chips; the tapping speed is 500-1500rpm, and the feed rate is 50-70mm / min. Feed depth

[0040] S9: Full inspection: Place the products neatly in the mold blister box, and conduct appearance inspection, logo inspection, size inspection, thread inspection, assembly test, sealing test and surface treatment inspection respectively. After passing the inspection, proceed to the next process;

[0041] S10: Packaging, prepare the product drawings, packaging specifications and related technical documents, ensure that the packaging personnel are familiar with the packaging requirements, use compressed air or a soft brush to remove dust, chips and impurities on the surface of the zinc alloy shell to ensure that the surface is clean and tidy, and then apply anti-rust oil on the surface to prevent oxidation and rust. Wrap the sandblasted surface of the zinc alloy shell with anti-rust paper to further enhance the anti-rust effect. Wrap each zinc alloy shell separately with a plastic bag or anti-static bag to prevent scratches and static damage, and affix labels with product name, specifications, production date, batch number and other information for easy management and traceability;

[0042] S11: Warehouse entry: confirm that the warehouse environment meets the requirements for storing zinc alloy shells, including temperature, humidity control, and cleanliness. Check whether the shelves are stable and whether the labels are clear. According to the warehouse entry form and packing list, check the quantity, specifications, batch number, and production date of the products to ensure that they are correct. Randomly select some products for quality review, including dimensional accuracy, surface quality, and functional testing. After confirmation, they are put into storage.

[0043] The key points of the invention are: the process adopts a standardized process, and each step from die-casting to warehousing has its specific purpose and effect. Through this systematic production process, the effect of ensuring product quality can be achieved;

[0044] The excess metal parts are removed through processes such as water removal (S2) and burr removal (S3), which reduces surface defects and improves appearance quality. The introduction of CNC equipment in processes such as T-slot carving (S4), drilling (S7) and tapping (S8) realizes automation and standardized operation, reduces human errors and speeds up production.

[0045] Precision-carved T-slots (S4) provide precise installation positions for subsequent assembly, enhancing the functionality of the product; electroplating (S6) improves the corrosion resistance and service life of the product, increasing added value; and sandblasting (S5) removes impurities such as oxide layers and burrs, while improving surface roughness, providing a good foundation for subsequent treatments such as painting or electroplating.

[0046] Full inspection (S9) is a comprehensive inspection after all processes are completed to ensure that each product meets high quality standards and reduces the risk of defective products entering the market. Packaging and warehousing (S10, S11) ensure that the products are not damaged during transportation and storage and remain in the best condition through strict packaging and warehousing management.

[0047] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as the protection scope of the present invention.

Claims

1. A zinc alloy shell production process, characterized in that: The process comprises the following steps: S1: Die casting, design the mold according to the product requirements and use steel to make the mold. The mold should have durability and thermal stability. Before die casting, the mold needs to be preheated to an appropriate temperature to prevent defects caused by cold start, and then prepare the die casting machine to assist in molding; S2: Remove the water outlet. Before removing the water outlet, first conduct a comprehensive inspection of the die-cast zinc alloy shell to confirm that there are no obvious defects such as pores and cracks. Then, according to the structure and gate position of the product, select the appropriate cutting equipment, use calipers and micrometers to check the key dimensions to ensure that they meet the design requirements. At the same time, check whether there are any missing gates or burrs on the surface to facilitate supplementary trimming; S3: Remove the burrs. According to the structure of the product and the location and size of the burrs, use a hand file, grinder, CNC cutting equipment, grinder or polisher to perform preliminary removal. The burrs should be gradually changed from coarse to fine until the surface is smooth and flat. Use appropriate detergent to clean the product to remove metal chips and oil stains generated during the trimming process to ensure the surface is clean. Place the cleaned zinc alloy shell in a well-ventilated place to dry naturally, or use drying equipment to accelerate the drying process. S4: Carve T-slots. Determine the position, size and depth of the T-slots according to the product drawings or CAD models, ensure that the design meets the functional requirements, and confirm that its specifications and quality meet the standards. Use computer-aided manufacturing software to write the processing program and define the cutting path, feed speed and speed parameters. S5: Sandblasting, determine the specific parameters of sandblasting, abrasive type, particle size, spray pressure, ice confirm that the zinc alloy shell has passed the preliminary processing, complete the inspection and cleaning, use a detergent to clean the surface of the zinc alloy shell, remove oil, dust and pollutants, ensure the surface is clean, turn on the sandblasting machine, start sandblasting the zinc alloy shell, and slowly move the spray gun according to the predetermined path to make the abrasive evenly cover the entire workpiece surface to avoid omission or excessive spraying; S6: Electroplating: Determine the specific parameters of electroplating according to product requirements, including the type, thickness and color of the coating. The coating types include chromium, nickel or silver. According to the required coating type, prepare the corresponding chromate solution, nickel sulfate solution or cyanide solution electroplating solution. The current density is 0.5-5A / dm 2 ; S7: Drilling. The zinc alloy shell is firmly mounted on the drilling machine workbench. A fixture is used to ensure its stability and precise position. The position of the drill bit is calibrated by a laser tool setting instrument or manual tool setting to ensure that the starting point of the drilling is accurate. A speed of 1000-3000rpm and a feed speed of 100-150mm / min are used. A smaller diameter drill bit is used for pre-drilling to form a guide hole. The drill bit diameter is gradually increased to finally reach the designed hole diameter to ensure that the hole wall is smooth and flat. S8: Tapping, select carbide or high-speed steel taps according to the specifications, prepare an appropriate amount of coolant or lubricant to reduce the cutting temperature and friction heat, and take away the chips to prevent accumulation and affect the tapping accuracy. At the same time, use compressed air or a brush to remove the chips remaining during the drilling process to ensure that the hole is clean. Insert the tap into the tapping wrench and ensure that it is perpendicular to the workpiece surface. The tap gradually enters the hole. After each turn, rotate in the opposite direction for about 1 / 4 turn to break and remove chips; S9: Full inspection: Place the products neatly in the mold blister box, and conduct appearance inspection, logo inspection, size inspection, thread inspection, assembly test, sealing test and surface treatment inspection respectively. After passing the inspection, proceed to the next process; S10: Packaging, prepare the product drawings, packaging specifications and related technical documents, ensure that the packaging personnel are familiar with the packaging requirements, use compressed air or a soft brush to remove dust, chips and impurities on the surface of the zinc alloy shell to ensure that the surface is clean and tidy, and then apply anti-rust oil on the surface to prevent oxidation and rust. Wrap the sandblasted surface of the zinc alloy shell with anti-rust paper to further enhance the anti-rust effect. Wrap each zinc alloy shell separately with a plastic bag or anti-static bag to prevent scratches and static damage, and affix labels with product name, specifications, production date, batch number and other information for easy management and traceability; S11: Warehouse entry: confirm that the warehouse environment meets the requirements for storing zinc alloy shells, including temperature, humidity control, and cleanliness. Check whether the shelves are stable and whether the labels are clear. According to the warehouse entry form and packing list, check the quantity, specifications, batch number, and production date of the products to ensure that they are correct. Randomly select some products for quality review, including dimensional accuracy, surface quality, and functional testing. After confirmation, they are put into storage.

2. A zinc alloy shell production process according to claim 1, characterized in that: In S1, the mold is preheated to a suitable temperature of 150°C-250°C.

3. A zinc alloy shell production process according to claim 1, characterized in that: In S2, the cutting equipment includes shears, files, grinders, and CNC cutting machines.

4. A zinc alloy shell production process according to any one of claims 1 to 3, characterized in that: In S3, the natural drying time is 10-24 hours, and the temperature of the drying equipment for accelerated drying is 100° C.-134° C.

5. A zinc alloy shell production process according to any one of claims 1 to 3, characterized in that: In the above S4, the cutting path is a continuous line of point segments, the feed speed is 100 mm / min, and the rotation speed is 900 R / S.

6. A zinc alloy shell production process according to any one of claims 1 to 3, characterized in that: In the S5, the abrasive particle size is 80-240 mesh, and the sandblasting pressure is between 0.3-0.7 MPa.

7. A zinc alloy shell production process according to any one of claims 1 to 3, characterized in that: In S6, the temperature of the electroplating solution is between 20°C and 60°C.

8. A zinc alloy shell production process according to any one of claims 1 to 3, characterized in that: In S8, the tapping is performed at a rotation speed of 500-1500 rpm and a feed depth of 50-70 mm / min.

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