A processing technology for stainless steel automobile valve

Abstract

The invention discloses a processing technology for a stainless steel automobile valve, and relates to the technical field of automobile parts processing. It comprises the following steps: Step A: High-frequency heating: heating the stainless steel wire rod material by high-frequency heating; Step B: Molding: cutting the heated stainless steel wire rod material by a molding machine, and then molding it into a valve body by a multi-station mold; Step C: Reprocessing: processing internal threads and external threads on the valve body; Step D: Vulcanization: cleaning and drying the valve body, vulcanizing the rubber through a vulcanization mold after coating with rubber to form a finished product; Step E: Finished product inspection: inspecting the finished product, and packaging and warehousing after the inspection is qualified. The present invention can manufacture stainless steel automobile valves with lower cost and better performance; stainless steel is used as the raw material, and its high hardness and high tensile strength significantly improve the service life and overall quality of the valve, providing a more reliable guarantee for the tire; stainless steel is more environmentally friendly than brass.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing, in particular to a processing technology of a stainless steel automobile valve. Background Art

[0002] In traditional automobile manufacturing, the valve stem is an important part of the tire system. Its main function is to control the inflation and deflation process of the tire and ensure the stability of the tire pressure. For a long time, brass (such as H62 brass) has been widely used in the processing and manufacturing of valve stems due to its good processing performance and certain corrosion resistance. However, with the development of the automobile industry and the continuous improvement of safety performance requirements, brass valve stems have gradually exposed some significant shortcomings.

[0003] First, the cost of brass is relatively high, and the cost of raw materials is high, which increases the cost of automobile manufacturing to a certain extent; second, the hardness and tensile strength of brass are relatively low. For example, the hardness of H62 brass can usually only reach HV80~120, and the tensile strength σb≥315 MPa. When faced with complex and changeable road conditions and extreme use environments, brass valves are prone to deformation, aging, and even leakage. Their durability and reliability are insufficient, posing a hidden danger to driving safety.

[0004] In contrast, stainless steel has shown great potential in the manufacture of automotive parts with its excellent mechanical properties and corrosion resistance. The hardness of stainless steel is generally in the range of HV≤200, and the tensile strength σb≥710MPa, which is far superior to brass. This means that valves made of stainless steel can maintain better shape stability and sealing performance when subjected to extreme conditions such as high pressure and high temperature. In addition, stainless steel also has excellent corrosion resistance and can effectively resist erosion by media such as water, air, acid and alkali, extending the service life of the valve. At the same time, the cost of stainless steel is only one-third of that of brass.

[0005] Finally, some countries have strict environmental protection requirements for exported automobile valves. The existing brass valves cannot be exported due to excessive levels of chromium, lead and other elements. However, the use of stainless steel to make valves avoids this problem, as stainless steel is more environmentally friendly.

[0006] In view of the above-mentioned shortcomings of brass valves and the advantages of stainless steel, it is particularly important to develop a stainless steel-based automotive valve processing technology. By optimizing the processing flow, improving processing accuracy and quality control level, stainless steel valves with higher performance and lower cost can be produced to meet the automotive industry's demand for high-quality, high-efficiency and low-cost parts.

[0007] Based on this, the applicant proposed a processing technology for a stainless steel automobile valve to solve the above technical problems. Summary of the invention

[0008] The invention aims at solving the deficiencies in the prior art and provides a processing technology for a stainless steel automobile valve.

[0009] The present invention is solved by the following technical solutions:

[0010] A processing technology for a stainless steel automobile valve, comprising the following steps:

[0011] Step A: high frequency heating: the stainless steel wire rod is subjected to high frequency heating, wherein the temperature of the high frequency heating is 300° C. to 1000° C.;

[0012] Step B: Forming: The stainless steel wire rod heated to 300°C~1000°C is cut by a forming machine, and then formed by a multi-station mold into a valve body;

[0013] Step C: Reprocessing: Processing internal and external threads on the valve body;

[0014] Step D: vulcanization: the valve body is cleaned and dried, coated with rubber, and then vulcanized through a vulcanization mold to form a finished product, wherein the vulcanization temperature is 140°C to 190°C, the pressure is 6MPa to 8MPa, and the time is 4min to 8min;

[0015] Step E: Finished product inspection: The finished product is inspected and packaged and put into storage after passing the inspection.

[0016] Preferably, the stainless steel wire rod material in step A comprises 304 stainless steel or 316 stainless steel.

[0017] Preferably, the specification of the stainless steel wire rod material in step A is .

[0018] Preferably, the stainless steel wire rod material in step A needs to be drawn by a wire drawing machine before high-frequency heating, and the diameter after drawing is 5.75 mm.

[0019] Preferably, the molding machine in step B has a total of 7 stations, including:

[0020] First station: shaping, removing burrs, eliminating deformation and unevenness, and adjusting the shape and size to uniform specifications;

[0021] The second station: forming airway;

[0022] The third station: forming steps, shrinking the rod and stretching the rod diameter;

[0023] The fourth station: stretching the inner hole to form the valve core cavity;

[0024] The fifth station: making step holes;

[0025] The sixth station: forming the glue stopper and stretching it to the predetermined length;

[0026] The seventh station: punching.

[0027] Preferably, the molding machine in step B has a total of 7 stations, including:

[0028] First station: shaping, removing burrs, eliminating deformation and unevenness, and adjusting the shape and size to uniform specifications;

[0029] The second station: forming airway;

[0030] The third station: forming steps, shrinking the rod and stretching the rod diameter;

[0031] The fourth station: stretching the inner hole to form the valve core cavity;

[0032] The fifth station: making step holes;

[0033] The sixth station: punching;

[0034] The seventh station: forming the glue stopper and stretching it to the predetermined length.

[0035] Preferably, the valve body in step B comprises a main pipe and a connecting pipe, a rubber stopper is provided between the main pipe and the connecting pipe, and an air passage is provided through the valve body.

[0036] Preferably, the external thread in step C is rolled out by a thread rolling process, and the external thread blank is The internal thread is extruded by extrusion process, and the internal thread wire blank is mm.

[0037] Preferably, in step C, after processing the internal thread and the external thread, the product needs to be inspected, and the qualified products are processed into step D, and the unqualified products are discarded.

[0038] Preferably, in step C, both the internal thread and the external thread are processed and arranged at the end of the connecting pipe.

[0039] Preferably, the cleaning in step D is performed by magnetic cleaning, and the cleaning time is 10 to 20 minutes.

[0040] Preferably, after vulcanization, the outside of the main pipe body and the rubber stopper are covered with rubber, and a groove is provided on the rubber for sealing connection with the wheel hub.

[0041] Preferably, the detection in step E includes detection of adhesive attachment rate, detection of size and shape accuracy, and detection of performance indexes, and the detection of performance indexes includes detection of hardness, tensile strength, elongation at break, and tear resistance.

[0042] The beneficial effects of the present invention are:

[0043] 1. Provide a stainless steel automobile valve: The process method of the present invention can be used to manufacture stainless steel automobile valves, which are different from existing brass valves and have lower costs and better performance;

[0044] 2. Improve product quality and durability: Stainless steel is used as the raw material. Its high hardness and high tensile strength enable the valve to maintain better shape stability and sealing performance under extreme use conditions, effectively reducing the occurrence of deformation, aging, leakage and other problems. At the same time, stainless steel has better corrosion resistance, which significantly improves the service life and overall quality of the valve;

[0045] 3. Reduce production costs: Stainless steel valves can significantly reduce production costs overall. In addition, by optimizing the processing flow and improving production efficiency, the processing technology of the present invention helps to further reduce manufacturing costs;

[0046] 4. Enhanced safety performance: The high strength and good sealing performance of stainless steel valves provide more reliable protection for automobile tires, reducing the situation of insufficient or excessive tire pressure caused by valve failure, thereby reducing the risk of safety accidents such as tire blowouts and enhancing the safety performance of vehicles;

[0047] 5. Improve market competitiveness: As automobile consumers' requirements for product quality and safety performance continue to increase, stainless steel valves will become the new favorite in the market. The processing technology of the present invention can produce high-quality and high-performance stainless steel valves to meet market demand and improve the market competitiveness of products;

[0048] 6. Promote environmental protection and sustainable development: Stainless steel has good recyclability and reuseability, and is more environmentally friendly than brass and other materials. The use of stainless steel valves helps reduce resource waste and environmental pollution, which is in line with the current global environmental protection and sustainable development concepts. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying creative work.

[0050] Figure 1 It is a processing flow chart of the present invention.

[0051] Figure 2 It is a schematic diagram of the three-dimensional structure of the valve mouth body of the present invention.

[0052] Figure 3 It is a sectional view of the three-dimensional structure of the valve body of the present invention.

[0053] Figure 4 It is a schematic diagram of the three-dimensional structure of the finished product of the present invention.

[0054] Figure 5 It is a sectional view of the three-dimensional structure of the finished product of the present invention.

[0055] In the figure: 1. valve body, 11. main body, 12. connecting pipe, 121. external thread, 122. internal thread, 13. rubber stopper, 14. airway, 2. rubber, 21. slot. DETAILED DESCRIPTION

[0056] The following will clearly and completely describe the technical solutions of various embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments described in 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.

[0057] Example 1: Figures 1 to 5 As shown, a processing technology of a stainless steel automobile valve of the present invention comprises the following steps: Step A: High frequency heating: The stainless steel wire rod material is drawn thin by a wire drawing machine, and the specification of the stainless steel wire rod material is , the diameter after drawing is 5.75mm, and then high-frequency heating is performed, and the temperature of the high-frequency heating is 300℃~1000℃; Step B: Forming: The stainless steel wire rod material heated to 300℃~1000℃ is cut by a forming machine, and the cutting specification is 26mm in length and 5.75mm in diameter, and then processed into a valve body 1 after multi-station mold forming; Step C: Reprocessing: Processing an internal thread 122 and an external thread 121 on the valve body 1, and the external thread 121 is rolled out by a thread rolling process, and the external thread 121 wire blank is The internal thread 122 is extruded by a thread extrusion process, and the internal thread 122 wire blank is mm, after processing the internal thread 122 and the external thread 121, the product needs to be tested, and the qualified products shall proceed to step D, and the unqualified products shall be discarded; Step D: Vulcanization: the valve body 1 is cleaned and dried, and the cleaning adopts magnetic cleaning, and the cleaning time is 15 minutes. After coating the rubber 2, the rubber 2 is vulcanized through a vulcanization mold to form a finished product. The vulcanization temperature is 140℃~190℃, the pressure is 6MPa~8MPa, and the time is 4min~8min; Step E: Finished product inspection: the finished product is inspected, and the inspection includes the adhesive rate inspection, the size and shape accuracy inspection and the performance index inspection. The performance index inspection includes the hardness, tensile strength, elongation at break, and tear resistance inspection. After the inspection is qualified, it is packaged and put into storage.

[0058] The process method of the present invention can be used to manufacture stainless steel automobile valves, which are different from existing brass valves and have lower cost and better performance. The stainless steel valves can significantly reduce production costs overall. In addition, by optimizing the processing flow and improving production efficiency, the processing technology of the present invention helps to further reduce manufacturing costs. The high strength and good sealing performance of the stainless steel valves provide more reliable protection for automobile tires, reducing the situation of insufficient or excessive tire pressure caused by valve failure, thereby reducing the risk of safety accidents such as tire blowouts and enhancing the safety performance of the vehicle.

[0059] The stainless steel wire rod material in step A includes 304 stainless steel or 316 stainless steel. Stainless steel is used as the raw material. Its high hardness and high tensile strength enable the valve to maintain better shape stability and sealing performance under extreme use conditions, effectively reducing the occurrence of deformation, aging, air leakage and other problems. At the same time, stainless steel has better corrosion resistance, thereby significantly improving the service life and overall quality of the valve. Stainless steel has good recyclability and reusability, and is more environmentally friendly than brass and other materials. The use of stainless steel valves helps to reduce resource waste and environmental pollution, which is in line with the current global environmental protection and sustainable development concepts.

[0060] The molding machine described in step B has a total of 7 stations, including:

[0061] First station: shaping, removing burrs, eliminating deformation and unevenness, adjusting the shape and size to uniform specifications, the large end diameter is 5.85mm, the small end diameter is 4.9mm, and the length is 25mm;

[0062] The second station: forming air channel 14, the diameter of air channel 14 is 4.4mm, the depth is 23.3mm, the outer diameter of the workpiece is 5.9mm, and the length is 36.5mm;

[0063] The third station: after turning the workpiece over, forming the steps, shrinking the rod and stretching the rod diameter, the large end diameter is 7.1mm, the length is 9mm, the small end diameter is 5.95mm, the length is 26mm, the airway 14 diameter is 4.38mm, and the depth is 23.0mm;

[0064] The fourth station: stretch the inner hole to form a valve core cavity, which has a diameter of 5.06mm, a depth of 9mm, an outer diameter of 7.12mm at the large end, a length of 13.3mm, an outer diameter of 5.97mm at the small end, a length of 24mm, and an airway 14 with a diameter of 4.38mm and a depth of 23.3mm;

[0065] The fifth station: make a step hole with a diameter of 3.9mm, a depth of 3.5mm, an outer diameter of 7.13mm at the large end, and a length of 13.8mm. The outer diameter of the small end is 5.99mm, and the length is 24mm. The diameter of the airway 14 is 4.37mm, and the depth is 23.3mm.

[0066] The sixth station: punching, connecting the air channel 14 and the valve core cavity, the hole diameter is 3.9mm;

[0067] The seventh station: forming the glue stopper 13 and stretching it to a predetermined length, the diameter of the glue stopper is 8.15mm, the outer diameter of the large end is 7.14mm, the length is 9.65mm, the diameter of the valve core cavity is 5.04mm, the depth is 9.0mm, the outer diameter of the small end is 6.01mm, the length is 26.15mm, the diameter of the airway 14 is 4.35mm, the depth is 23.3mm, the diameter of the step hole is 3.85mm, and the total length of the workpiece is 37.8mm.

[0068] The valve body 1 in step B includes a main body 11 and a connecting tube 12, a rubber stopper 13 is arranged between the main body 11 and the connecting tube 12, an air passage 14 is arranged through the valve body 1, the internal thread 122 and the external thread 121 are both processed and arranged at the end of the connecting tube 12, after vulcanization, the outside of the main body 11 and the rubber stopper 13 are coated with rubber 2, and a groove 21 is arranged on the rubber 2 for sealing connection with the wheel hub.

[0069] Example 2: Figures 1 to 5 As shown, a processing technology of a stainless steel automobile valve of the present invention comprises the following steps: Step A: High frequency heating: The stainless steel wire rod material is drawn thin by a wire drawing machine, and the specification of the stainless steel wire rod material is , the diameter after drawing is 5.75mm, and then high-frequency heating is performed, and the temperature of the high-frequency heating is 300℃~1000℃; Step B: Forming: The stainless steel wire rod material heated to 300℃~1000℃ is cut by a forming machine, and the cutting specification is 26mm in length and 5.75mm in diameter, and then processed into a valve body 1 after multi-station mold forming; Step C: Reprocessing: Processing an internal thread 122 and an external thread 121 on the valve body 1, and the external thread 121 is rolled out by a thread rolling process, and the external thread 121 wire blank is The internal thread 122 is extruded by a thread extrusion process, and the internal thread 122 wire blank is mm, after processing the internal thread 122 and the external thread 121, the product needs to be tested, and the qualified products shall proceed to step D, and the unqualified products shall be discarded; Step D: Vulcanization: the valve body 1 is cleaned and dried, and the cleaning adopts magnetic cleaning, and the cleaning time is 15 minutes. After coating the rubber 2, the rubber 2 is vulcanized through a vulcanization mold to form a finished product. The vulcanization temperature is 140℃~190℃, the pressure is 6MPa~8MPa, and the time is 4min~8min; Step E: Finished product inspection: the finished product is inspected, and the inspection includes the adhesive rate inspection, the size and shape accuracy inspection and the performance index inspection. The performance index inspection includes the hardness, tensile strength, elongation at break, and tear resistance inspection. After the inspection is qualified, it is packaged and put into storage.

[0070] The process method of the present invention can be used to manufacture stainless steel automobile valves, which are different from existing brass valves and have lower cost and better performance. The stainless steel valves can significantly reduce production costs overall. In addition, by optimizing the processing flow and improving production efficiency, the processing technology of the present invention helps to further reduce manufacturing costs. The high strength and good sealing performance of the stainless steel valves provide more reliable protection for automobile tires, reducing the situation of insufficient or excessive tire pressure caused by valve failure, thereby reducing the risk of safety accidents such as tire blowouts and enhancing the safety performance of the vehicle.

[0071] The stainless steel wire rod material in step A includes 304 stainless steel or 316 stainless steel. Stainless steel is used as the raw material. Its high hardness and high tensile strength enable the valve to maintain better shape stability and sealing performance under extreme use conditions, effectively reducing the occurrence of deformation, aging, air leakage and other problems. At the same time, stainless steel has better corrosion resistance, thereby significantly improving the service life and overall quality of the valve. Stainless steel has good recyclability and reusability, and is more environmentally friendly than brass and other materials. The use of stainless steel valves helps to reduce resource waste and environmental pollution, which is in line with the current global environmental protection and sustainable development concepts.

[0072] The molding machine described in step B has a total of 7 stations, including:

[0073] First station: shaping, removing burrs, eliminating deformation and unevenness, adjusting the shape and size to uniform specifications, the large end diameter is 5.86mm, the small end diameter is 4.91mm, and the length is 25.05mm;

[0074] The second station: forming air channel 14, the diameter of air channel 14 is 4.41mm, the depth is 23.35mm, the outer diameter of the workpiece is 5.91mm, and the length is 36.55mm;

[0075] The third station: after turning the workpiece over, forming the steps, shrinking the rod and stretching the rod diameter, the large end diameter is 7.11mm, the length is 9.05mm, the small end diameter is 5.96mm, the length is 26.05mm, the airway 14 diameter is 4.39mm, and the depth is 23.05mm;

[0076] The fourth station: stretch the inner hole to form a valve core cavity, which has a diameter of 5.07mm, a depth of 9.05mm, a large end outer diameter of 7.13mm, a length of 13.35mm, a small end outer diameter of 5.98mm, a length of 24.05mm, an airway 14 diameter of 4.39mm, and a depth of 23.35mm;

[0077] The fifth station: make a step hole with a diameter of 3.91mm, a depth of 3.55mm, a large end outer diameter of 7.14mm, and a length of 13.85mm. The small end outer diameter is 6.00mm, and the length is 24.05mm. The diameter of the airway 14 is 4.38mm, and the depth is 23.35mm;

[0078] Sixth station: forming the glue stopper 13 and stretching it to a predetermined length, the diameter of the glue stopper is 8.16mm, the outer diameter of the large end is 7.15mm, the length is 9.70mm, the diameter of the valve core cavity is 5.05mm, the depth is 9.05mm, the outer diameter of the small end is 6.02mm, the length is 26.20mm, the diameter of the airway 14 is 4.36mm, the depth is 23.35mm, the diameter of the step hole is 3.86mm, and the total length of the workpiece is 37.85mm;

[0079] The seventh station: punching, connecting the air channel 14 and the valve core cavity, the hole diameter is 3.86mm.

[0080] The valve body 1 in step B includes a main body 11 and a connecting tube 12, a rubber stopper 13 is arranged between the main body 11 and the connecting tube 12, an air passage 14 is arranged through the valve body 1, the internal thread 122 and the external thread 121 are both processed and arranged at the end of the connecting tube 12, after vulcanization, the outside of the main body 11 and the rubber stopper 13 are coated with rubber 2, and a groove 21 is arranged on the rubber 2 for sealing connection with the wheel hub.

[0081] Example 3: Figures 1 to 5As shown, a processing technology of a stainless steel automobile valve of the present invention comprises the following steps: Step A: High frequency heating: The stainless steel wire rod material is drawn thin by a wire drawing machine, and the specification of the stainless steel wire rod material is , the diameter after drawing is 5.75mm, and then high-frequency heating is performed, and the temperature of the high-frequency heating is 300℃~1000℃; Step B: Forming: The stainless steel wire rod material heated to 300℃~1000℃ is cut by a forming machine, and the cutting specification is 26mm in length and 5.75mm in diameter, and then processed into a valve body 1 after multi-station mold forming; Step C: Reprocessing: Processing an internal thread 122 and an external thread 121 on the valve body 1, and the external thread 121 is rolled out by a thread rolling process, and the external thread 121 wire blank is The internal thread 122 is extruded by a thread extrusion process, and the internal thread 122 wire blank is mm, after processing the internal thread 122 and the external thread 121, the product needs to be tested, and the qualified products shall proceed to step D, and the unqualified products shall be discarded; Step D: Vulcanization: the valve body 1 is cleaned and dried, and the cleaning adopts magnetic cleaning, and the cleaning time is 15 minutes. After coating the rubber 2, the rubber 2 is vulcanized through a vulcanization mold to form a finished product. The vulcanization temperature is 140℃~190℃, the pressure is 6MPa~8MPa, and the time is 4min~8min; Step E: Finished product inspection: the finished product is inspected, and the inspection includes the adhesive rate inspection, the size and shape accuracy inspection and the performance index inspection. The performance index inspection includes the hardness, tensile strength, elongation at break, and tear resistance inspection. After the inspection is qualified, it is packaged and put into storage.

[0082] The process method of the present invention can be used to manufacture stainless steel automobile valves, which are different from existing brass valves and have lower cost and better performance. The stainless steel valves can significantly reduce production costs overall. In addition, by optimizing the processing flow and improving production efficiency, the processing technology of the present invention helps to further reduce manufacturing costs. The high strength and good sealing performance of the stainless steel valves provide more reliable protection for automobile tires, reducing the situation of insufficient or excessive tire pressure caused by valve failure, thereby reducing the risk of safety accidents such as tire blowouts and enhancing the safety performance of the vehicle.

[0083] The stainless steel wire rod material in step A includes 304 stainless steel or 316 stainless steel. Stainless steel is used as the raw material. Its high hardness and high tensile strength enable the valve to maintain better shape stability and sealing performance under extreme use conditions, effectively reducing the occurrence of deformation, aging, air leakage and other problems. At the same time, stainless steel has better corrosion resistance, thereby significantly improving the service life and overall quality of the valve. Stainless steel has good recyclability and reusability, and is more environmentally friendly than brass and other materials. The use of stainless steel valves helps to reduce resource waste and environmental pollution, which is in line with the current global environmental protection and sustainable development concepts.

[0084] The molding machine described in step B has a total of 7 stations, including:

[0085] First station: shaping, removing burrs, eliminating deformation and unevenness, adjusting the shape and size to uniform specifications, the large end diameter is 5.85mm, the small end diameter is 4.9mm, and the length is 25.00mm;

[0086] The second station: forming air channel 14, the diameter of air channel 14 is 4.41mm, the depth is 23.32mm, the outer diameter of the workpiece is 5.91mm, and the length is 36.52mm;

[0087] The third station: after turning the workpiece over, forming the steps, shrinking the rod and stretching the rod diameter, the large end diameter is 7.10mm, the length is 9.02mm, the small end diameter is 5.95mm, the length is 26.02mm, the airway 14 diameter is 4.38mm, and the depth is 23.02mm;

[0088] The fourth station: stretch the inner hole to form a valve core cavity, which has a diameter of 5.07mm, a depth of 9.05mm, an outer diameter of 7.12mm at the large end, a length of 13.35mm, an outer diameter of 5.98mm at the small end, a length of 24.02mm, an airway 14 with a diameter of 4.38mm and a depth of 23.30mm;

[0089] The fifth station: make a step hole with a diameter of 3.90mm, a depth of 3.55mm, an outer diameter of 7.14mm at the large end, and a length of 13.80mm. The outer diameter of the small end is 6.00mm, and the length is 24.00mm. The diameter of the airway 14 is 4.37mm, and the depth is 23.30mm.

[0090] Sixth station: forming the glue stopper 13 and stretching it to a predetermined length, the diameter of the glue stopper is 8.15mm, the outer diameter of the large end is 7.14mm, the length is 9.70mm, the diameter of the valve core cavity is 5.04mm, the depth is 9.05mm, the outer diameter of the small end is 6.01mm, the length is 26.20mm, the diameter of the airway 14 is 4.36mm, the depth is 23.32mm, the diameter of the step hole is 3.86mm, and the total length of the workpiece is 37.82mm;

[0091] The seventh station: punching, connecting the air channel 14 and the valve core cavity, the hole diameter is 3.85mm.

[0092] The valve body 1 in step B includes a main body 11 and a connecting tube 12, a rubber stopper 13 is arranged between the main body 11 and the connecting tube 12, an air passage 14 is arranged through the valve body 1, the internal thread 122 and the external thread 121 are both processed and arranged at the end of the connecting tube 12, after vulcanization, the outside of the main body 11 and the rubber stopper 13 are coated with rubber 2, and a groove 21 is arranged on the rubber 2 for sealing connection with the wheel hub.

[0093] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0094] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A processing technology for a stainless steel automobile valve, characterized in that: It is used for processing a valve body (1), the valve body (1) comprising a main body (11) and a connecting pipe (12), a rubber stopper (13) is arranged between the main body (11) and the connecting pipe (12), and an air passage (14) and a valve core cavity are arranged through the valve body (1); The processing technology includes the following steps: Step A: high frequency heating: the stainless steel wire rod is subjected to high frequency heating, wherein the temperature of the high frequency heating is 300° C. to 1000° C.; Step B: Forming: the stainless steel wire rod material heated to 300°C-1000°C is cut by a forming machine, and then formed by a multi-station mold to form a valve body (1). The forming machine has 7 stations, including: the first station: shaping, removing burrs, eliminating deformation and unevenness, and adjusting the shape and size to uniform specifications; the second station: forming the air channel (14); the third station: forming steps, shrinking the rod and stretching the rod diameter; the fourth station: stretching the inner hole to form the valve core cavity; the fifth station: punching the step hole; the sixth station: forming the glue stopper (13) and stretching it to a predetermined length; the seventh station: punching, connecting the air channel (14) and the valve core cavity; or the sixth station and the seventh station are interchangeable, that is, the sixth station: punching, connecting the air channel (14) and the valve core cavity; the seventh station: forming the glue stopper (13) and stretching it to a predetermined length; Step C: Reprocessing: processing the internal thread (122) and the external thread (121) on the valve body (1); Step D: vulcanization: cleaning and drying the valve body (1), wherein the cleaning is performed by magnetic cleaning, and the cleaning time is 10 to 20 minutes. After coating the rubber (2), the rubber (2) is vulcanized through a vulcanization mold to form a finished product. The vulcanization temperature is 140° C. to 190° C., the pressure is 6 MPa to 8 MPa, and the time is 4 min to 8 min. Step E: Finished product inspection: The finished product is inspected and packaged and put into storage after passing the inspection.

2. The processing technology of a stainless steel automobile valve according to claim 1 is characterized in that: The stainless steel wire rod material in step A includes 304 stainless steel or 316 stainless steel.

3. The processing technology of a stainless steel automobile valve according to claim 1 is characterized in that: In step C, after processing the internal thread (122) and the external thread (121), the product needs to be inspected. Products that pass the inspection proceed to step D, and unqualified products are discarded.

4. The processing technology of a stainless steel automobile valve according to claim 1 is characterized in that: In step C, the internal thread (122) and the external thread (121) are both processed and arranged at the end of the connecting pipe (12).

5. The processing technology of a stainless steel automobile valve according to claim 1 is characterized in that: After vulcanization, the outside of the main body (11) and the rubber stopper (13) are covered with rubber (2), and a groove (21) is provided on the rubber (2) for sealing connection with the wheel hub.

6. The processing technology of a stainless steel automobile valve according to claim 1 is characterized in that: The tests in step E include adhesive attachment rate test, size and shape accuracy test and performance index test, and the performance index test includes hardness, tensile strength, elongation at break and tear resistance test.

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