Pneumatic element protective cover machining and forming process

Abstract

The invention discloses a pneumatic element protective cover machining and forming process, and relates to the technical field of pneumatic element machining. Comprising the following steps: S1, preparing mixed molten aluminum; s2, injection molding treatment; s3, drawing and cutting treatment; s4, flattening treatment; s5, polishing treatment is carried out; s6, flaring treatment is conducted through a flaring machine; s7, punching treatment is carried out; and S8, detecting, packaging and warehousing. According to the pneumatic element protective cover machining forming technology, drawing treatment is added in the machining process for production and manufacturing, through a high-precision size die hole of a drawing die, the stable product size can be obtained after drawing, the precision of shape and position sizes such as parallelism and perpendicularity of a product in the extrusion process is improved, and the comprehensive performance of the product is improved; meanwhile, the hidden danger of deformation caused by subsequent stretching of the product is eliminated through drawing treatment, compared with a machining process in the prior art, the whole machining process shortens the machining time, the obtained product is good in quality, and the prepared protective cover has good cracking resistance and corrosion resistance.

Description

Technical Field

[0001] The invention relates to the technical field of pneumatic component processing, in particular to a processing and forming process for a pneumatic component protective cover. Background Art

[0002] During the production process of electronic components, it is necessary to install electronic component protective covers on the outside of them. When producing electronic component protective covers, most of them are produced by injection molding. When injection molding the electronic component housing, the plastic particles need to be heated and melted and then injected into the mold for condensation, so that the plastic melt solidifies to form the electronic component protective cover that needs to be used.

[0003] Aluminum has special chemical and physical properties. It is not only light and strong, but also has good ductility, electrical conductivity, thermal conductivity, heat resistance and nuclear radiation resistance. At present, in the production process of electronic component shells, the protective cover is easy to deform and cannot play a protective role. The quality and standardization of the product cannot be controlled, and the product cannot be consistent and standardized. Therefore, we proposed a pneumatic component protective cover processing and forming process to solve the above problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a pneumatic component protective cover processing and forming process to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a pneumatic component protective cover processing and forming process, comprising the following steps:

[0006] S1. Preparation of mixed aluminum liquid:

[0007] The mixed raw materials are added into the smelting furnace and heated until completely melted to obtain mixed aluminum liquid for use;

[0008] S2, injection molding:

[0009] The mixed aluminum liquid in step S1 is injected into a mold in an injection molding machine, and the mixed aluminum liquid is injection molded by the injection molding machine to obtain an aluminum tube blank whose size and shape and position tolerances meet standard requirements;

[0010] S3, drawing and cutting process:

[0011] The aluminum tube blank is drawn evenly in the axial direction, and the drawn tube blank is cut to a fixed length after being cooled;

[0012] S4, flat head processing:

[0013] The aluminum tube blank in step S3 is flattened by using a flattening machine;

[0014] S5. Grinding treatment:

[0015] The aluminum tube blank after the flattening process in step S4 is finely polished to remove burrs and scratches to obtain a protective cover;

[0016] S6, belling machine belling process:

[0017] Using an expanding machine to expand the diameter of the prepared protective cover to prepare protective covers with different diameters;

[0018] S7, punching process:

[0019] The prepared protective cover is punched by using a punching die to obtain the desired protective cover with holes;

[0020] S8, testing and packaging for storage:

[0021] The protective covers are inspected after processing and packaged and put into storage after passing the inspection.

[0022] To further optimize the technical solution, the mixed raw materials in step S1 are aluminum powder, iron powder, cross-linked polyethylene, polyethylene and lubricant; the preparation method of the mixed raw materials is: adding aluminum powder and iron powder into a reaction kettle and heating it to 100-120°C, then adding cross-linked polyethylene, polyethylene and lubricant, and maintaining the temperature at 50-70°C to obtain the required mixed raw materials.

[0023] To further optimize the technical solution, the lubricant is selected from 3-aminopropyltriethoxysilane and / or monoalkoxy titanate; the amount of the lubricant is 10-15% by weight, and the chemical equation of the aluminum powder and the iron powder under high temperature reaction is: 2Al+Fe2O3→Al2O3+2Fe.

[0024] To further optimize the technical solution, in step S2, the mixed aluminum liquid is injected into the mold to ensure that the density of the mixed aluminum liquid is uniform and smooth, and the protective cover prepared in step S7 is a hollow cylindrical structure.

[0025] To further optimize the technical solution, the aluminum tube blank prepared in step S2 is first annealed before the drawing process.

[0026] To further optimize the technical solution, the annealing temperature is 380-420°C, and the holding time is 60-110min; after the holding is completed, the furnace is cooled at a cooling rate of ≤35°C / hour, cooled to below 240°C, taken out of the furnace and air-cooled to below 40°C.

[0027] To further optimize the technical solution, the drawing process in step S3 is to design a drawing die, in which an aperture matching the aluminum tube blank is opened; the annealed aluminum tube blank is placed into the aperture, and the annealed aluminum tube blank is drawn.

[0028] To further optimize the technical solution, the surface of the pneumatic component protective cover prepared in step S7 is finely ground, and the size and position accuracy meet the design requirements of the drawing.

[0029] To further optimize the technical solution, the surface of the pneumatic component protective cover prepared in step S7 is finely ground, and the size and position accuracy meet the design requirements of the drawing.

[0030] To further optimize the technical solution, the prepared protective cover is inspected in step S8 to screen out defective products with low weight and obvious cracks; the aluminum tube blank is used in conjunction with a waste collection mechanism during flattening, grinding, expanding, and punching. At the same time, the waste collection mechanism includes a crushing tank, a feed inlet, a crushing roller, a discharge port, and a collection box. The fertilizer is put into the crushing tank through the feed inlet, and the defective products are crushed by the crushing roller and fall into the collection box through the discharge port.

[0031] To further optimize the technical solution, the pneumatic component protective cover prepared in step S7 complies with the T5 state specified in GB2 / 5237-2008, with a tensile strength ≥160MPa, a yield strength ≥110MPa and a Webster hardness ≥9HW.

[0032] Beneficial Effects

[0033] Compared with the prior art, the present invention provides a pneumatic component protective cover processing and forming process, which has the following beneficial effects:

[0034] 1. The processing and forming process of the pneumatic component protective cover adds a drawing process during the processing for production and manufacturing. Through the high-precision die hole of the drawing die, a stable product size can be obtained after drawing, and the accuracy of the shape and position dimensions such as parallelism and verticality of the product during the extrusion process is improved, and the comprehensive performance of the product is improved. At the same time, the drawing process eliminates the hidden danger of deformation caused by subsequent stretching of the product. Compared with the processing technology in the prior art, the entire processing technology shortens the processing time, saves energy, and obtains good product quality, reduces the production cost of the aluminum tube, and makes the prepared protective cover have good crack resistance and corrosion resistance, thereby improving the safety of the protective cover when in use.

[0035] 2. The pneumatic component protective cover processing and forming process. The pneumatic component protective cover prepared by the present invention is suitable for different types of pneumatic components, can reduce the processing steps, and ensure the quality of the product blank after processing without changing the machine tool and tooling. The hole position accuracy can be consistent with the hole position accuracy designed in the drawing, and has a high use value. It does not require welding, greatly reduces the process, reduces the difficulty of the manufacturing process, reduces the manufacturing cost, avoids high-temperature deformation caused by welding, has good product consistency, beautiful appearance, and standardized production of spare parts, which is convenient for future repair and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The present invention is a schematic flow chart of a process for processing and forming a pneumatic component protective cover. DETAILED DESCRIPTION

[0037] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] Please refer to Figure 1 As shown, the present invention discloses a pneumatic component protective cover processing and forming process, comprising the following steps:

[0040] S1. Preparation of mixed aluminum liquid:

[0041] The mixed raw materials are added into a smelting furnace and heated until completely melted to obtain a mixed aluminum liquid for standby use. The mixed raw materials are aluminum powder, iron powder, cross-linked polyethylene, polyethylene and a lubricant. The preparation method of the mixed raw materials is: adding aluminum powder and iron powder into a reaction kettle and heating it to 120° C., then adding cross-linked polyethylene, polyethylene and a lubricant, and maintaining the temperature at 70° C. to obtain the required mixed raw materials, wherein the lubricant is selected from 3-aminopropyltriethoxysilane and / or monoalkoxy titanate; wherein the amount of the lubricant is 10-15% by weight, and the chemical equation of the aluminum powder and the iron powder under high temperature reaction is: 2Al+Fe2O3→Al2O3+2Fe;

[0042] S2, injection molding:

[0043] The mixed aluminum liquid in step S1 is injected into a mold in an injection molding machine, and the mixed aluminum liquid is injection molded by the injection molding machine to obtain an aluminum tube blank whose size and shape and position tolerances meet the standard requirements, and the mixed aluminum liquid is injected into the mold to ensure that the density of the mixed aluminum liquid is uniform and smooth. The prepared aluminum tube blank is annealed before drawing, and the annealing temperature is 380°C and the insulation time is 110min; after the insulation is completed, it is cooled in the furnace at a cooling rate of ≤35°C / hour, cooled to below 240°C, taken out of the furnace and air-cooled, and air-cooled to below 40°C;

[0044] S3, drawing and cutting process:

[0045] The aluminum tube blank is drawn evenly in the axial direction, and the drawn tubular blank is cut to a fixed length after being cooled. The drawing process includes designing a drawing die, and a hole diameter matching the aluminum tube blank is opened in the die; the annealed aluminum tube blank is placed in the hole diameter, and the annealed aluminum tube blank is drawn;

[0046] S4, flat head processing:

[0047] The aluminum tube blank in step S3 is flattened by using a flattening machine;

[0048] S5. Grinding treatment:

[0049] The aluminum tube blank after the flattening process in step S4 is finely polished to remove burrs and scratches to obtain a protective cover;

[0050] S6, belling machine belling process:

[0051] Using an expanding machine to expand the diameter of the prepared protective cover to prepare protective covers with different diameters;

[0052] S7, punching process:

[0053] The prepared protective cover is punched by a punching die to obtain the required protective cover with holes. The prepared protective cover is a hollow cylindrical structure. The surface of the prepared pneumatic component protective cover is finely ground, and the size and position accuracy meet the design requirements of the drawing. The prepared pneumatic component protective cover meets the T5 state specified in GB2 / 5237-2008, with a tensile strength of 190MPa, a yield strength of 150MPa and a Webster hardness of 14HW.

[0054] S8, testing and packaging for storage:

[0055] The protective covers are inspected after processing, and packaged and stored after passing the inspection. The prepared protective covers are inspected to screen out defective products with low weight and obvious cracks; the aluminum tube blanks are used in conjunction with a waste collection mechanism during the flattening, grinding, expanding and punching processes. At the same time, the waste collection mechanism includes a crushing tank, a feed port, a crushing roller, a discharge port and a collection box. The fertilizer is put into the crushing tank through the feed port, and the defective products are crushed by the crushing roller and fall into the collection box through the discharge port.

[0056] Embodiment 2:

[0057] Please refer to Figure 1 As shown, the present invention discloses a pneumatic component protective cover processing and forming process, comprising the following steps:

[0058] S1. Preparation of mixed aluminum liquid:

[0059] The mixed raw materials are added into a smelting furnace and heated until completely melted to obtain a mixed aluminum liquid for standby use. The mixed raw materials are aluminum powder, iron powder, cross-linked polyethylene, polyethylene and a lubricant. The preparation method of the mixed raw materials is: adding aluminum powder and iron powder into a reaction kettle and heating it to 120° C., then adding cross-linked polyethylene, polyethylene and a lubricant, and maintaining the temperature at 70° C. to obtain the required mixed raw materials, wherein the lubricant is selected from 3-aminopropyltriethoxysilane and / or monoalkoxy titanate; wherein the amount of the lubricant is 10-15% by weight, and the chemical equation of the aluminum powder and the iron powder under high temperature reaction is: 2Al+Fe2O3→Al2O3+2Fe;

[0060] S2, injection molding:

[0061] The mixed aluminum liquid in step S1 is injected into a mold in an injection molding machine, and the mixed aluminum liquid is injection molded by the injection molding machine to obtain an aluminum tube blank whose size and shape and position tolerances meet the standard requirements, and the mixed aluminum liquid is injected into the mold to ensure that the density of the mixed aluminum liquid is uniform and smooth. The prepared aluminum tube blank is annealed before drawing, and the annealing temperature is 400°C and the insulation time is 90min; after the insulation is completed, it is cooled in the furnace at a cooling rate of ≤35°C / hour, cooled to below 240°C, and then taken out of the furnace for air cooling, and air cooling to below 40°C;

[0062] S3, drawing and cutting process:

[0063] The aluminum tube blank is drawn evenly in the axial direction, and the drawn tubular blank is cut to a fixed length after being cooled. The drawing process includes designing a drawing die, and a hole diameter matching the aluminum tube blank is opened in the die; the annealed aluminum tube blank is placed in the hole diameter, and the annealed aluminum tube blank is drawn;

[0064] S4, flat head processing:

[0065] The aluminum tube blank in step S3 is flattened by using a flattening machine;

[0066] S5. Grinding treatment:

[0067] The aluminum tube blank after the flattening process in step S4 is finely polished to remove burrs and scratches to obtain a protective cover;

[0068] S6, belling machine belling process:

[0069] Using an expanding machine to expand the diameter of the prepared protective cover to prepare protective covers with different diameters;

[0070] S7, punching process:

[0071] The prepared protective cover is punched by a punching die to obtain the required protective cover with holes. The prepared protective cover is a hollow cylindrical structure. The surface of the prepared pneumatic component protective cover is finely ground, and the size and position accuracy meet the design requirements of the drawing. The prepared pneumatic component protective cover meets the T5 state specified in GB2 / 5237-2008, with a tensile strength of 180MPa, a yield strength of 145MPa and a Webster hardness of 13HW.

[0072] S8, testing and packaging for storage:

[0073] The protective covers are inspected after processing, and packaged and stored after passing the inspection. The prepared protective covers are inspected to screen out defective products with low weight and obvious cracks; the aluminum tube blanks are used in conjunction with a waste collection mechanism during the flattening, grinding, expanding and punching processes. At the same time, the waste collection mechanism includes a crushing tank, a feed port, a crushing roller, a discharge port and a collection box. The fertilizer is put into the crushing tank through the feed port, and the defective products are crushed by the crushing roller and fall into the collection box through the discharge port.

[0074] Embodiment three:

[0075] Please refer to Figure 1 As shown, the present invention discloses a pneumatic component protective cover processing and forming process, comprising the following steps:

[0076] S1. Preparation of mixed aluminum liquid:

[0077] The mixed raw materials are added into a smelting furnace and heated until completely melted to obtain a mixed aluminum liquid for standby use. The mixed raw materials are aluminum powder, iron powder, cross-linked polyethylene, polyethylene and lubricant. The preparation method of the mixed raw materials is: adding aluminum powder and iron powder into a reaction kettle and heating it to 120° C., then adding cross-linked polyethylene, polyethylene and lubricant, and maintaining the temperature at 60° C. to obtain the required mixed raw materials, wherein the lubricant is selected from 3-aminopropyltriethoxysilane and / or monoalkoxy titanate; wherein the amount of the lubricant is 10-15% by weight, and the chemical equation of the aluminum powder and the iron powder under high temperature reaction is: 2Al+Fe2O3→Al2O3+2Fe;

[0078] S2, injection molding:

[0079] The mixed aluminum liquid in step S1 is injected into a mold in an injection molding machine, and the mixed aluminum liquid is injection molded by the injection molding machine to obtain an aluminum tube blank whose size and shape and position tolerances meet the standard requirements, and the mixed aluminum liquid is injected into the mold to ensure that the density of the mixed aluminum liquid is uniform and smooth. The prepared aluminum tube blank is annealed before drawing, and the annealing temperature is 420°C and the insulation time is 90min; after the insulation is completed, it is cooled in the furnace at a cooling rate of ≤35°C / hour, cooled to below 240°C, taken out of the furnace and air-cooled, and air-cooled to below 40°C;

[0080] S3, drawing and cutting process:

[0081] The aluminum tube blank is drawn evenly in the axial direction, and the drawn tubular blank is cut to a fixed length after being cooled. The drawing process includes designing a drawing die, and a hole diameter matching the aluminum tube blank is opened in the die; the annealed aluminum tube blank is placed in the hole diameter, and the annealed aluminum tube blank is drawn;

[0082] S4, flat head processing:

[0083] The aluminum tube blank in step S3 is flattened by using a flattening machine;

[0084] S5. Grinding treatment:

[0085] The aluminum tube blank after the flattening process in step S4 is finely polished to remove burrs and scratches to obtain a protective cover;

[0086] S6, belling machine belling process:

[0087] Using an expanding machine to expand the diameter of the prepared protective cover to prepare protective covers with different diameters;

[0088] S7, punching process:

[0089] The prepared protective cover is punched by a punching die to obtain the required protective cover with holes. The prepared protective cover is a hollow cylindrical structure. The surface of the prepared pneumatic component protective cover is finely ground, and the size and position accuracy meet the design requirements of the drawing. The prepared pneumatic component protective cover meets the T5 state specified in GB2 / 5237-2008, with a tensile strength of 170MPa, a yield strength of 135MPa and a Webster hardness of 13HW.

[0090] S8, testing and packaging for storage:

[0091] The protective covers are inspected after processing, and packaged and stored after passing the inspection. The prepared protective covers are inspected to screen out defective products with low weight and obvious cracks; the aluminum tube blanks are used in conjunction with a waste collection mechanism during the flattening, grinding, expanding and punching processes. At the same time, the waste collection mechanism includes a crushing tank, a feed port, a crushing roller, a discharge port and a collection box. The fertilizer is put into the crushing tank through the feed port, and the defective products are crushed by the crushing roller and fall into the collection box through the discharge port.

[0092] Experimental Example 4:

[0093] Please refer to Figure 1 As shown, the present invention discloses a pneumatic component protective cover processing and forming process, comprising the following steps:

[0094] S1. Preparation of mixed aluminum liquid:

[0095] The mixed raw materials are added into a smelting furnace and heated until completely melted to obtain a mixed aluminum liquid for standby use. The mixed raw materials are aluminum powder, iron powder, cross-linked polyethylene, polyethylene and a lubricant. The preparation method of the mixed raw materials is: adding aluminum powder and iron powder into a reaction kettle and heating it to 120° C., then adding cross-linked polyethylene, polyethylene and a lubricant, and maintaining the temperature at 70° C. to obtain the required mixed raw materials, wherein the lubricant is selected from 3-aminopropyltriethoxysilane and / or monoalkoxy titanate; wherein the amount of the lubricant is 10-15% by weight, and the chemical equation of the aluminum powder and the iron powder under high temperature reaction is: 2Al+Fe2O3→Al2O3+2Fe;

[0096] S2, injection molding:

[0097] The mixed aluminum liquid in step S1 is injected into a mold in an injection molding machine, and the mixed aluminum liquid is injection molded by the injection molding machine to obtain an aluminum tube blank whose size and shape and position tolerances meet the standard requirements, and the mixed aluminum liquid is injected into the mold to ensure that the density of the mixed aluminum liquid is uniform and smooth. The prepared aluminum tube blank is annealed before drawing, and the annealing temperature is 410°C and the insulation time is 100min; after the insulation is completed, it is cooled in the furnace at a cooling rate of ≤35°C / hour, cooled to below 240°C, taken out of the furnace and air-cooled, and air-cooled to below 40°C;

[0098] S3, drawing and cutting process:

[0099] The aluminum tube blank is drawn evenly in the axial direction, and the drawn tubular blank is cut to a fixed length after being cooled. The drawing process includes designing a drawing die, and a hole diameter matching the aluminum tube blank is opened in the die; the annealed aluminum tube blank is placed in the hole diameter, and the annealed aluminum tube blank is drawn;

[0100] S4, flat head processing:

[0101] The aluminum tube blank in step S3 is flattened by using a flattening machine;

[0102] S5. Grinding treatment:

[0103] The aluminum tube blank after the flattening process in step S4 is finely polished to remove burrs and scratches to obtain a protective cover;

[0104] S6, belling machine belling process:

[0105] Using an expanding machine to expand the diameter of the prepared protective cover to prepare protective covers with different diameters;

[0106] S7, punching process:

[0107] The prepared protective cover is punched by a punching die to obtain the required protective cover with holes. The prepared protective cover is a hollow cylindrical structure. The surface of the prepared pneumatic component protective cover is finely ground, and the size and position accuracy meet the design requirements of the drawing. The prepared pneumatic component protective cover meets the T5 state specified in GB2 / 5237-2008, with a tensile strength of 160MPa, a yield strength of 140MPa and a Webster hardness of 12HW.

[0108] S8, testing and packaging for storage:

[0109] The protective covers are inspected after processing, and packaged and stored after passing the inspection. The prepared protective covers are inspected to screen out defective products with low weight and obvious cracks; the aluminum tube blanks are used in conjunction with a waste collection mechanism during the flattening, grinding, expanding and punching processes. At the same time, the waste collection mechanism includes a crushing tank, a feed port, a crushing roller, a discharge port and a collection box. The fertilizer is put into the crushing tank through the feed port, and the defective products are crushed by the crushing roller and fall into the collection box through the discharge port.

[0110] Judging criteria:

[0111] Table 1 is a data comparison of the protective covers of Examples 1 to 5 and the control group (commercially available) in accordance with the standard specified in GB2 / 5237-2008, with a tensile strength of ≥160MPa, a yield strength of ≥110MPa and a Webster hardness of ≥9HW, as shown in Table 1 below:

[0112]

[0113] Table 2 shows the pneumatic component protective covers prepared in Examples 1 to 4. Under the standard specified in GB2 / 5237-2008, the percentage of qualified rates (100%) of tensile strength, yield strength and Vickers hardness tests are as shown in Table 2 below:

[0114]

[0115] It can be seen from Table 1-2 that the protective cover prepared by the present invention has broad application prospects. By comparing the four embodiments, the best effect is embodiment 1. Therefore, embodiment 1 is selected as the best embodiment. Specific changes to the quantity also fall within the scope of protection of this technical solution.

[0116] The beneficial effects of the present invention are as follows: the pneumatic component protective cover processing and forming process adds a drawing process to the production and manufacturing during the processing process. Through the high-precision die hole of the drawing die, a stable product size can be obtained after drawing, the accuracy of the shape and position dimensions such as parallelism and verticality of the product during the extrusion process is improved, and the comprehensive performance of the product is improved. At the same time, the drawing process eliminates the hidden danger of deformation caused by subsequent stretching of the product. Compared with the processing technology in the prior art, the entire processing technology shortens the processing time, saves energy, and obtains good product quality, reduces the production cost of the aluminum tube, and makes the prepared protective cover have good crack resistance and corrosion resistance, and improves the safety of the protective cover when in use; the pneumatic component protective cover prepared by the present invention is suitable for different types of pneumatic components, can reduce the processing procedures, and ensure the quality of the product blank after processing without changing the machine tool and tooling. The hole position can be consistent with the hole position designed in the drawing, has a high use value, does not require welding, greatly reduces the process, reduces the difficulty of the manufacturing process, reduces the manufacturing cost, avoids high-temperature deformation caused by welding, has good product consistency, beautiful appearance, standardized production of spare parts, and is convenient for future repair and maintenance.

[0117] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0118] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic component protective cover processing and forming process, characterized in that: The following steps are involved: S1. Preparation of mixed aluminum liquid: The mixed raw materials are added into the smelting furnace and heated until they are completely melted to obtain mixed aluminum liquid for later use; S2, injection molding: Injecting the mixed aluminum liquid in step S1 into a mold in an injection molding machine, and using the injection molding machine to perform injection molding on the mixed aluminum liquid to obtain an aluminum tube blank whose size and shape and position tolerances meet standard requirements; S3, drawing and cutting process: The aluminum tube blank is drawn evenly in the axial direction, and the drawn tube blank is cut to a fixed length after being cooled; S4, flat head processing: The aluminum tube blank in step S3 is flattened by using a flattening machine; S5. Grinding treatment: The aluminum tube blank after the flattening process in step S4 is finely polished to remove burrs and scratches to obtain a protective cover; S6, belling machine belling process: Using an expanding machine to expand the diameter of the prepared protective cover to prepare protective covers with different diameters; S7, punching process: The prepared protective cover is punched by using a punching die to obtain the desired protective cover with holes; S8, testing and packaging for storage: The protective covers are inspected after processing and packaged and put into storage after passing the inspection.

2. The pneumatic component protective cover processing and forming process according to claim 1 is characterized in that: The mixed raw materials in step S1 are aluminum powder, iron powder, cross-linked polyethylene, polyethylene and lubricant; the preparation method of the mixed raw materials is: adding aluminum powder and iron powder into a reaction kettle and heating it to 100-120°C, then adding cross-linked polyethylene, polyethylene and lubricant, and maintaining the temperature at 50-70°C to obtain the required mixed raw materials.

3. The pneumatic component protective cover processing and forming process according to claim 2 is characterized in that: The lubricant is selected from 3-aminopropyltriethoxysilane and / or monoalkoxy titanate; the amount of the lubricant is 10-15% by weight, and the chemical equation of the aluminum powder and the iron powder under high temperature reaction is: 2Al+Fe2O3→Al2O3+2Fe.

4. The pneumatic component protective cover processing and forming process according to claim 1 is characterized in that: In the step S2, the mixed aluminum liquid is injected into the mold to ensure that the density of the mixed aluminum liquid is uniform and smooth. The protective cover prepared in the step S7 is a hollow cylindrical structure.

5. The pneumatic component protective cover processing and forming process according to claim 1 is characterized in that: The aluminum tube blank prepared in step S2 is first annealed before drawing.

6. The pneumatic component protective cover processing and forming process according to claim 5 is characterized in that: The annealing temperature is 380-420°C, and the holding time is 60-110min. After the holding is completed, the furnace is cooled at a cooling rate of ≤35°C / hour, and the furnace is air-cooled to below 240°C, and then the furnace is air-cooled to below 40°C.

7. The pneumatic component protective cover processing and forming process according to claim 1 is characterized in that: The drawing process in step S3 is to design a drawing die, in which an aperture matching the aluminum tube blank is opened; the annealed aluminum tube blank is placed in the aperture, and the annealed aluminum tube blank is drawn.

8. The process for forming a pneumatic component protective cover according to claim 1, characterized in that: The surface of the pneumatic component protective cover prepared in step S7 is finely ground, and the size and position accuracy meet the design requirements of the drawing.

9. The pneumatic component protective cover processing and forming process according to claim 1, characterized in that: In the step S8, the prepared protective cover is inspected to screen out defective products with low weight and obvious cracks; the aluminum tube blank is used in conjunction with a waste collection mechanism during the flattening, grinding, expanding and punching processes. At the same time, the waste collection mechanism includes a crushing tank, a feed inlet, a crushing roller, a discharge port and a collection box. The fertilizer is put into the crushing tank through the feed inlet, and the defective products are crushed by the crushing roller and fall into the collection box through the discharge port.

10. The pneumatic component protective cover processing and forming process according to claim 1, characterized in that: The pneumatic component protective cover prepared in step S7 meets the T5 state specified in GB2 / 5237-2008, with a tensile strength of ≥160 MPa, a yield strength of ≥110 MPa and a Webster hardness of ≥9 HW.

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