Production process of aluminum cover

Abstract

The invention relates to an aluminum cover production process which comprises the following steps: S1, checking the specification, size, surface quality and chemical components of an alloy aluminum plate, and transferring the alloy aluminum plate from a warehouse to a position near a production line for cutting; s2, a plate shearing machine is used for shearing the coiled material or the flat plate aluminum material into the size and shape suitable for follow-up machining, and heating treatment is carried out; s3, the heated metal plate is placed in a die of a punching machine to be stretched for the first time, and force is applied to enable the material to be preliminarily deformed in the die; s4, on the basis of the first-time stretching, the stretching strength and speed are adjusted for second-time stretching, and the shape and size of the part are further refined; s5, the shape of the part is continuously refined through third-time stretching; s6, fourth-time stretching is conducted by accurately controlling stretching parameters, it is ensured that the size and shape of the part meet the design requirements, and fine forming of the part is completed; the method is simple, and the problems that the metal material is too high in hardness, low in plasticity and poor in machining performance are effectively solved.

Description

Technical Field

[0001] The invention relates to the field of aluminum cover production, and in particular to a production process of an aluminum cover. Background Art

[0002] Aluminum caps are widely used in the packaging industry owing to their excellent durability, sealing, and corrosion resistance, which promotes the market growth; therefore, the production process of aluminum caps is very important.

[0003] In the existing aluminum cover production process, the metal material lacks annealing treatment after stretching, resulting in problems such as excessive hardness, reduced plasticity and poor processing performance of the metal material, thus affecting the subsequent production of the aluminum cover. Summary of the invention

[0004] Based on this, it is necessary to provide a production process of an aluminum cover to address the above problems.

[0005] A production process of an aluminum cover comprises the following steps:

[0006] S1: Check the specifications, dimensions, surface quality and chemical composition of the alloy aluminum plates to ensure that they meet production requirements, and transfer the alloy aluminum plates from the warehouse to the vicinity of the production line for cutting;

[0007] S2: Use a shearing machine to cut the coil or flat aluminum material into a size and shape suitable for subsequent processing, and then heat it;

[0008] S3: The heated metal sheet is placed in the die of the punch press for the first stretching, and force is applied to cause the material to undergo initial deformation in the die;

[0009] S4: Based on the initial stretching, the stretching force and speed are adjusted for secondary stretching to further refine the shape and size of the component;

[0010] S5: Continue to refine the shape of the component through the third stretching, gradually approaching the final design requirements;

[0011] S6: The fourth stretching is performed by precisely controlling the stretching parameters to ensure that the size and shape of the component meet the design requirements and complete the fine molding of the component;

[0012] S7: Grind the edge of the stretched aluminum cover to remove burrs and sharp edges;

[0013] S8: Clean the surface of the aluminum shell in an oil tank using an ultrasonic cleaner to remove oil, dust and other impurities;

[0014] S9: Dehydrating the cleaned aluminum shell by using a hot air blower;

[0015] S10: Drying the aluminum cover using a dryer.

[0016] In one embodiment, an annealing treatment is performed after each stretching.

[0017] In one embodiment, the annealing treatment temperature is 400-500 degrees Celsius, and the annealing time is 1-2 hours.

[0018] In one embodiment, in step S7, the edge burrs of the aluminum cover are smaller than 0.02 mm, and the metal particles are smaller than 0.02 mm.

[0019] In one embodiment, in step S8, the cleaning time is 3 minutes, and the temperature of the cleaning machine is 60-70 degrees Celsius.

[0020] In one embodiment, in step S9, the hot air blower performs dehydration treatment for 1-2 minutes.

[0021] In one embodiment, in step S10, the drying rate of the dryer is 11.5-12.5 r / min, and the temperature of the dryer is 60-70 degrees Celsius.

[0022] In the above-mentioned production process of the aluminum cover, annealing treatment is performed after each stretching step, which can reduce the hardness of the aluminum alloy plate, improve its plasticity and improve its processing performance, which is conducive to better carrying out the next step of making the aluminum cover and improving the quality of the aluminum cover product. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0024] As used herein, the term "prepared from" is synonymous with "comprising." As used herein, the terms "comprising," "including," "having," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0025] When amount, concentration or other value or parameter is expressed as range, preferred range or a series of upper preferred value and lower preferred value limit range, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value and any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when disclosing range "1 to 5", described range should be interpreted as including range "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5" etc. When numerical range is described in this article, unless otherwise stated, the range is intended to include its end value and all integers and fractions within the range.

[0026] In addition, the indefinite articles "a" and "an" before the elements or components of the present invention have no restrictions on the quantity requirements (i.e. the number of occurrences) of the elements or components. Therefore, "a" or "an" should be interpreted as including one or at least one, and the elements or components in the singular form also include the plural form, unless the number is obviously intended to be in the singular form.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] A production process of an aluminum cover comprises the following steps:

[0029] S1: Check the specifications, dimensions, surface quality and chemical composition of the alloy aluminum plates to ensure that they meet production requirements, and transfer the alloy aluminum plates from the warehouse to the vicinity of the production line for cutting;

[0030] S2: Use a shearing machine to cut the coil or flat aluminum material into a size and shape suitable for subsequent processing, and then heat it;

[0031] S3: placing the heated metal sheet in the die of a punch press for the first stretching, applying force to cause the material to undergo initial deformation in the die; performing an annealing treatment after the first stretching, the annealing treatment temperature is 400-500 degrees Celsius, and the annealing time is 1-2 hours.

[0032] S4: Based on the initial stretching, the stretching strength and speed are adjusted to perform secondary stretching to further refine the shape and size of the component; after the secondary stretching, an annealing treatment is performed, the annealing temperature is 400-500 degrees Celsius, and the annealing time is 1-2 hours.

[0033] S5: The shape of the component is further refined through the third stretching, gradually approaching the final design requirements; after the third stretching, an annealing treatment is performed, the annealing temperature is 400-500 degrees Celsius, and the annealing time is 1-2 hours.

[0034] S6: By precisely controlling the stretching parameters, the fourth stretching is performed to ensure that the size and shape of the component meet the design requirements and complete the fine molding of the component; after the fourth stretching, an annealing treatment is performed, the annealing temperature is 400-500 degrees Celsius, and the annealing time is 1-2 hours.

[0035] S7: Grind the edge of the stretched aluminum cover to remove burrs and sharp edges; the burrs on the edge of the aluminum cover are less than 0.02 mm, and the metal particles are less than 0.02 mm.

[0036] S8: Using an ultrasonic cleaning machine to clean the surface of the aluminum shell in an oil tank to remove oil, dust and other impurities; the cleaning time is 3 minutes, and the temperature of the cleaning machine is 60-70 degrees Celsius.

[0037] S9: Dehydrating the cleaned aluminum shell by using a hot air blower; the dehydrating time of the hot air blower is 1-2 minutes.

[0038] S10: drying the aluminum cover in a drying machine at a drying rate of 11.5-12.5 r / min and a temperature of 60-70 degrees Celsius.

[0039] It should be noted that in the feeding process, the aluminum coil is introduced into the production line through the coil machine, and the aluminum coil passes through the aluminum strip slitting machine to cut the aluminum coil into aluminum strips of appropriate width, and the cut aluminum strips will enter the next process; in the cutting process, the aluminum sheet is placed on the shearing machine, and the aluminum sheet is cut into blocks by the shearing machine. The waste generated during the cutting process is transmitted to the collection chamber through the first conveyor belt to achieve clean production;

[0040] Stretching process: The stretching of the aluminum cover is usually divided into several times to gradually form the final shape and size. After each stretching, the diameter and height of the aluminum cover will change, gradually approaching the shape of the final product; the first stretching is conducive to the punch press to initially stretch the aluminum sheet into a cup shape in the mold, and the stretching ratio is 20% to 25%; the second stretching, on the basis of the first stretching, the stretching force is applied again to further shape the cup shape, further thin the cup wall, and increase the height of the cup. The stretching ratio can reach 23% to 28%; the third stretching, through the design of the mold, controls the flow of the material to ensure the accuracy of the shape and the uniformity of the wall thickness, and continues to adjust the shape and wall thickness of the cup. The stretching ratio is usually between 35% and 40%; the fourth stretching completes the final adjustment to ensure the precise size and shape of the aluminum cover, and finally forms it to the required size and shape, and fine-tunes the stretching ratio according to different models of products. Through multiple stretching, the size and shape of the aluminum cover can be controlled more accurately to ensure that it meets the design requirements and improve product precision; multiple stretching helps to refine the grain of aluminum, improve its strength and plasticity, enhance the durability of the aluminum cover, and improve material properties. At the same time, it can also effectively reduce the generation of scraps and waste and improve material utilization.

[0041] Annealing stage: The aluminum material is heated to a specific temperature, which is usually higher than the recrystallization temperature of the material. During the heating process, the grain structure inside the aluminum material begins to change, and the internal stress gradually decreases. After the aluminum material is heated to the specified temperature, it needs to be kept for a certain period of time so that the material can reach thermal equilibrium. The length of the insulation time depends on the thickness of the material, the heating temperature, and the required degree of microstructural change, which is between 400 and 500 degrees Celsius. After insulation, the aluminum material needs to be cooled slowly, usually by furnace cooling, to avoid internal stress caused by rapid cooling. Annealing after each stretching can reduce the hardness of the aluminum cover material and improve plasticity, while also eliminating internal stress, improving the surrounding structure, improving processing performance, and improving corrosion resistance.

[0042] Trimming process: According to the regularity of the shape of the aluminum cap, the aluminum cap is divided into regular aluminum cap and irregular aluminum cap, and classified and summarized. The aluminum cap is placed on the fixed mold of the trimming machine to fix the position of the aluminum cap. The fixed mold rotates and approaches the knife wheel on the trimming machine to cut the end face of the aluminum cap and cut off the excess edge of the aluminum cap to form a flat end face. The waste generated by the cutting is transferred to the collection chamber through the third conveyor belt for centralized collection. The cut aluminum cap is inspected to ensure that the end face is flat and has no sharp edges. The regular aluminum cap is transferred to the automatic polishing machine for polishing and brightening, and the irregular aluminum cap is transferred to the manual polishing machine for polishing.

[0043] Example 1

[0044] A production process of an aluminum cover comprises the following steps:

[0045] S1: Check the specifications, dimensions, surface quality and chemical composition of the alloy aluminum plates to ensure that they meet production requirements, and transfer the alloy aluminum plates from the warehouse to the vicinity of the production line for cutting;

[0046] S2: Use a shearing machine to cut the coil or flat aluminum material into a size and shape suitable for subsequent processing, and then heat it;

[0047] S3: placing the heated metal sheet in the die of a punch press for the first stretching, applying force to cause the material to undergo initial deformation in the die; performing an annealing treatment after the first stretching, the annealing treatment temperature is 400 degrees Celsius, and the annealing time is 1 hour.

[0048] S4: Based on the initial stretching, the stretching strength and speed are adjusted to perform secondary stretching to further refine the shape and size of the component; after the secondary stretching, an annealing treatment is performed, the annealing temperature is 400 degrees Celsius, and the annealing time is 1 hour.

[0049] S5: The shape of the component is further refined through the third stretching, gradually approaching the final design requirements; after the third stretching, an annealing treatment is performed, the annealing temperature is 400 degrees Celsius, and the annealing time is 1 hour.

[0050] S6: The fourth stretching is performed by precisely controlling the stretching parameters to ensure that the size and shape of the component meet the design requirements and complete the fine molding of the component; an annealing treatment is performed after the fourth stretching, the annealing temperature is 400 degrees Celsius, and the annealing time is 1 hour.

[0051] S7: Grind the edge of the stretched aluminum cover to remove burrs and sharp edges; the burrs on the edge of the aluminum cover are less than 0.02 mm, and the metal particles are less than 0.02 mm.

[0052] S8: Using an ultrasonic cleaning machine to clean the surface of the aluminum shell in an oil tank to remove oil, dust and other impurities; the cleaning time is 3 minutes, and the temperature of the cleaning machine is 60 degrees Celsius.

[0053] S9: Dehydrating the cleaned aluminum shell by using a hot air blower; the dehydrating time of the hot air blower is 1 minute.

[0054] S10: drying the aluminum cover in a drying machine at a drying rate of 11.5 r / min and a temperature of 60 degrees Celsius.

[0055] Example 2

[0056] A production process of an aluminum cover comprises the following steps:

[0057] S1: Check the specifications, dimensions, surface quality and chemical composition of the alloy aluminum plates to ensure that they meet production requirements, and transfer the alloy aluminum plates from the warehouse to the vicinity of the production line for cutting;

[0058] S2: Use a shearing machine to cut the coil or flat aluminum material into a size and shape suitable for subsequent processing, and then heat it;

[0059] S3: placing the heated metal sheet in the die of a punch press for the first stretching, applying force to cause the material to undergo initial deformation in the die; performing an annealing treatment after the first stretching, the annealing treatment temperature is 500 degrees Celsius, and the annealing time is 2 hours.

[0060] S4: Based on the initial stretching, the stretching strength and speed are adjusted to perform secondary stretching to further refine the shape and size of the component; after the secondary stretching, an annealing treatment is performed, the annealing temperature is 500 degrees Celsius, and the annealing time is 2 hours.

[0061] S5: The shape of the component is further refined through the third stretching, gradually approaching the final design requirements; after the third stretching, an annealing treatment is performed, the annealing temperature is 500 degrees Celsius, and the annealing time is 2 hours.

[0062] S6: By precisely controlling the stretching parameters, the fourth stretching is performed to ensure that the size and shape of the component meet the design requirements and complete the fine molding of the component; after the fourth stretching, an annealing treatment is performed, the annealing temperature is 500 degrees Celsius, and the annealing time is 2 hours.

[0063] S7: Grind the edge of the stretched aluminum cover to remove burrs and sharp edges; the burrs on the edge of the aluminum cover are less than 0.02 mm, and the metal particles are less than 0.02 mm.

[0064] S8: Using an ultrasonic cleaning machine to clean the surface of the aluminum shell in an oil tank to remove oil, dust and other impurities; the cleaning time is 3 minutes, and the temperature of the cleaning machine is 70 degrees Celsius.

[0065] S9: Dehydrating the cleaned aluminum shell by using a hot air blower; the dehydrating time of the hot air blower is 2 minutes.

[0066] S10: drying the aluminum cover in a drying machine at a drying rate of 12.5 r / min and a temperature of 70 degrees Celsius.

[0067] In the above-mentioned production process of the aluminum cover, annealing treatment is performed after each stretching step, which can reduce the hardness of the aluminum alloy plate, improve its plasticity and improve its processing performance, which is conducive to better carrying out the next step of making the aluminum cover and improving the quality of the aluminum cover product.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A production process for an aluminum cover, characterized in that: The following steps are involved: S1: Check the specifications, dimensions, surface quality and chemical composition of the alloy aluminum plates to ensure that they meet production requirements, and transfer the alloy aluminum plates from the warehouse to the vicinity of the production line for cutting; S2: Use a shearing machine to cut the coil or flat aluminum material into a size and shape suitable for subsequent processing, and then heat it; S3: The heated metal sheet is placed in the die of the punch press for the first stretching, and force is applied to cause the material to undergo initial deformation in the die; S4: Based on the initial stretching, the stretching force and speed are adjusted for secondary stretching to further refine the shape and size of the component; S5: Continue to refine the shape of the component through the third stretching, gradually approaching the final design requirements; S6: The fourth stretching is performed by precisely controlling the stretching parameters to ensure that the size and shape of the component meet the design requirements and complete the fine molding of the component; S7: Grind the edge of the stretched aluminum cover to remove burrs and sharp edges; S8: Use an ultrasonic cleaner to clean the surface of the aluminum shell in an oil tank to remove oil, dust and other impurities; S9: Dehydrating the cleaned aluminum shell by using a hot air blower; S10: Drying the aluminum cover using a dryer.

2. The production process of an aluminum cover according to claim 1, characterized in that: After each stretching, an annealing treatment is performed.

3. The production process of an aluminum cover according to claim 2, characterized in that: The annealing treatment is performed at a temperature of 400-500 degrees Celsius and for a time of 1-2 hours.

4. The production process of an aluminum cover according to claim 1, characterized in that: In step S7, the edge burrs of the aluminum cover are smaller than 0.02 mm, and the metal particles are smaller than 0.02 mm.

5. The production process of an aluminum cover according to claim 1, characterized in that: In step S8, the cleaning time is 3 minutes, and the temperature of the cleaning machine is 60-70 degrees Celsius.

6. The production process of an aluminum cover according to claim 1, characterized in that: In step S9, the hot air blower performs dehydration treatment for 1-2 minutes.

7. The production process of an aluminum cover according to claim 1, characterized in that: In step S10, the drying rate of the dryer is 11.5-12.5 r / min, and the temperature of the dryer is 60-70 degrees Celsius.