Part mold quenching process

Abstract

The invention discloses a part mold quenching process, and relates to the technical field of nut machining. The part mold quenching process comprises the following specific processes. The method comprises the following steps: S1, a forming punch quenching process, S2, a punching punch quenching process, S3, a hexagonal floor mold quenching process, S4, a punching floor mold quenching process, S5, a straight-through female hexagonal sleeve quenching process, S6, a straight-through female rod quenching process, S7, a center quenching process, S8, a turntable screw tap clamp quenching process, S9, a 40Cr steel mold quenching process and S10, a No.45 steel, 40Cr and Cr12 workpiece quenching process. According to the technology, the cost benefit is remarkably improved, in the fields of nut production and industrial and mining equipment machining, due to the fact that an independent and effective mold quenching technology is lacked in a traditional mode, the problem is successfully solved through a new quenching technology, independent and efficient mold quenching is achieved, and practice verifies that one set of mold treated through the technology can produce 80,000 nut blanks; and the purchasing frequency and number of molds are greatly reduced, and the production cost is remarkably reduced.

Description

Technical Field

[0001] The invention relates to the technical field of nut processing, and in particular to a component mold quenching process. Background Art

[0002] In industrial manufacturing, especially in the nut processing industry, the difference in raw material quality poses a severe challenge to the performance of molds. When short-length materials produced by steel rolling are used as raw materials, the dimensional deviation and unqualified performance are prominent, causing the mold to face greater risks of wear, deformation and fracture during service. Traditional quenching technology has obvious defects in dealing with such complex situations and cannot meet the special requirements of short-length material processing for high hardness and toughness of molds. Due to its own technical limitations, enterprises have long relied on purchased molds to maintain production. However, the purchased molds are not optimized for the specific raw materials of the enterprise during design and manufacturing, and have poor adaptability and short service life. Frequent mold replacement has become a production bottleneck. This not only leads to long-term low production efficiency and increases the labor intensity of workers, but also compresses the profit margin of enterprises due to the high cost of mold purchase. At the same time, in the field of industrial and mining equipment manufacturing, molds are key consumables. The shortcomings of traditional quenching processes also restrict the overall production efficiency of equipment and the improvement of the quality of processed parts, becoming a key technical obstacle that needs to be broken through in the development of the industry. Innovative quenching processes are urgently needed to reverse the situation and promote industrial upgrading and efficient development. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a component mold quenching process that can solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a component mold quenching process, including the following specific processes, S1 forming punch quenching process, S2 punching punch quenching process, S3 hexagonal ground mold quenching process, S4 punching ground mold quenching process, S5 straight-through mother hexagonal sleeve quenching process, S6 straight-through mother rod quenching process, S7 top center quenching process, S8 turntable screw machine tap fixture quenching process, S9: 40Cr steel mold quenching process and S10: 45 steel and 40Cr, Cr12 workpiece quenching process.

[0005] Preferably, the S1 forming punch quenching process:

[0006] Oxide scale removal and preheating: Use oxygen to bake out the oxide scale on the surface of the forming punch, and use a temperature gun to monitor the temperature. Stop heating when the temperature reaches about 1150 degrees. This step is to remove surface impurities, prepare for subsequent quenching, and ensure uniform heating;

[0007] Cooling treatment: Quickly place the heated forming punch into salt water for cooling. The salt water has a fast cooling rate, which helps obtain the required hardness. During the cooling process, ensure that all parts of the punch are cooled evenly to prevent deformation or cracks caused by uneven cooling;

[0008] Tempering process;

[0009] First tempering: Place the cooled forming punch into a heating device, heat it to 650 degrees and hold for 2 hours, then cool it naturally in the air. This tempering is mainly to eliminate quenching internal stress, stabilize the structure, and adjust hardness and toughness;

[0010] Second tempering: Heat it again to 615 degrees, hold for 2 hours, and then cool it in the air. Further optimize the mechanical properties of the punch, keep the hardness between Rockwell hardness 46 - 47 HRC, meet the usage requirements of the forming punch in nut processing, and improve its wear resistance and toughness.

[0011] Preferably, the quenching process of the S2 punching punch;

[0012] Segmented quenching heating: Adopt the segmented quenching method, use a quenching oxyacetylene torch to heat the punching punch. When the punch just turns red but not white, stop heating when the temperature measured by the temperature measuring gun reaches 1100 degrees. Segmented quenching can obtain different hardness gradients according to the working requirements of different parts of the punch;

[0013] Cooling operation: Immediately place the heated punching punch into machine oil for cooling. The machine oil has a relatively slow cooling rate, which can better control the cooling process, reduce the generation of internal stress, avoid cracks, and at the same time meet the different hardness requirements of different parts of the punch;

[0014] Tempering steps;

[0015] First tempering: Heat it to 350 degrees, hold for 2 hours, and then cool it in the air. Initially adjust the hardness of the front section of the punch to reach between 49 - 51 HRC to ensure the cutting performance and wear resistance during the punching process;

[0016] Second tempering: Use an intermediate frequency furnace for tempering. When the part of the punch just turns red, put it into machine oil for cooling, and further adjust the hardness of the rear section to between 40 - 43 HRC to ensure the overall performance balance of the punch, and improve its service life and working stability.

[0017] Preferably, the quenching process of the S3 hexagonal die;

[0018] Heating and holding: Heat the hexagonal die to 1150 degrees and hold for 30 minutes. This temperature and holding time can fully austenitize the internal structure of the die, lay the foundation for subsequent cooling transformation, and ensure the uniformity of the overall performance of the die;

[0019] Cooling and tempering;

[0020] Cooling: Oil cooling is adopted. Utilize the cooling characteristics of the oil to obtain appropriate hardness and tissue morphology, and reduce the risk of deformation;

[0021] Tempering: The first tempering is to 620 °C and hold for 2 hours, then air cooling. The second tempering is to 580 °C and hold for 2 hours, then air cooling. Finally, the hardness of the hexagonal die is stabilized between 46 - 47 HRC, enhancing its wear resistance and anti-deformation ability, and meeting the working conditions requirements of frequent stamping during nut processing.

[0022] Preferably, the quenching process of the S4 punching die;

[0023] Heating and holding: Heat the punching die to 880 °C and hold for 25 minutes. At this temperature, the organizational structure of the die material undergoes transformation to reach the state required for quenching;

[0024] Cooling and shaping: Direct cooling is carried out without tempering operation. After cooling, the hardness of the punching die reaches between 54 - 58 HRC. This high hardness can effectively resist wear and deformation during the punching process, ensuring punching accuracy and die life, and meeting the specific process requirements of nut punching.

[0025] Preferably, the quenching process of the S5 straight-through female hexagon sleeve;

[0026] High-temperature heating and holding: Heat the straight-through female hexagon sleeve to 1250 °C and hold for 40 minutes. The high-temperature long-time holding enables the material to be heated evenly, creating conditions for obtaining good comprehensive performance;

[0027] Cooling and tempering treatment;

[0028] Cooling: First, cool in the air. Utilize the relatively gentle nature of air cooling to control the tissue transformation and reduce internal stress;

[0029] Tempering: The first tempering is to 660 °C and hold for 2 hours, then oil cooling. The second tempering is to 590 °C and hold for 2 hours, then air cooling. Keep the hardness between 48 - 50 HRC, improving its strength and toughness, meeting the mechanical property requirements of the hexagon sleeve in nut processing, and ensuring its reliability under complex stress conditions.

[0030] Preferably, the quenching process of the S6 straight-through female rod;

[0031] Heating and holding procedure: Heat the straight-through female rod to 1250 °C and hold for 40 minutes to ensure the homogenization of the internal structure of the rod, laying the foundation for the performance after subsequent quenching and cooling;

[0032] Cooling and tempering process;

[0033] Cooling: Use oil cooling to obtain a suitable cooling rate and ensure the normal progress of tissue transformation;

[0034] Tempering: The first tempering is carried out to 665 °C for 2 hours and air-cooled, and the second tempering is carried out to 590 °C for 2 hours and air-cooled, so that the hardness of the straight-through mother rod reaches between 49 - 51 HRC, enhancing its wear resistance and fatigue resistance, and adapting to the reciprocating motion and stress conditions during nut processing.

[0035] Preferably, the S7 center quenching process;

[0036] Oxide scale treatment and heating: Use a quenching oxygen torch to bake and remove the oxide scale on the center, measure the temperature with a temperature measuring gun up to 1100 °C, remove the oxide scale to ensure the heating effect, and the appropriate heating temperature provides conditions for subsequent quenching;

[0037] Cooling and tempering: After water cooling, it is held at 580 °C for 2 hours and air-cooled, so that the hardness of the center reaches between 43 - 55 HRC. Water cooling obtains a higher hardness, and tempering adjusts the structure and properties, ensuring that the center can meet the hardness requirements and has a certain toughness during nut processing, preventing fracture failure.

[0038] Preferably, the S8 tap clamp quenching process for a turret tapping machine;

[0039] Heating and cooling: Use a quenching oxygen torch to bake and remove the oxide scale and heat up to 1100 °C, then water-cool. Rapid heating and water-cooling enable the tap clamp to obtain a higher hardness, meeting the requirements for wear resistance during the tapping process and preventing fixture wear from affecting the thread processing accuracy;

[0040] Tempering operation: Temper to 310 °C for 2 hours and air-cooled, stabilize the hardness between 51 - 53 HRC, and at the same time eliminate some internal stresses, improving the comprehensive mechanical properties and service life of the fixture.

[0041] Preferably, the S9: quenching process for a 40Cr steel mold;

[0042] Heating and holding process: Heat the 40Cr steel mold to 860 °C and hold for 25 minutes. This temperature and time can make the 40Cr steel reach a suitable austenitization degree, prepare for subsequent cooling transformation, and meet the requirements of the mold for structure and properties;

[0043] Cooling and tempering: After oil cooling, it is held at 250 °C for 2 hours and air-cooled. Oil cooling controls the cooling rate, and tempering adjusts the structure and properties, making the mold have a moderate hardness and good wear resistance, suitable for the processing scenario of industrial and mining molds with high wear resistance requirements and little or no impact;

[0044] S10: Quenching process for 45 steel, 40Cr, and Cr12 workpieces;

[0045] Heating and cooling: Bake with oxygen until it turns red, measure the temperature with a temperature gun to about 950 degrees and then cool with water. This heating and cooling method enables the workpiece to obtain a higher hardness and meet its basic use requirements in different industrial and mining equipment, such as the wear resistance requirements of gears and wheels;

[0046] Tempering classification treatment, high wear resistance and no impact (suitable for gears and wheels): tempering to 200 degrees for 2 hours and air cooling to further improve hardness and wear resistance, ensure good surface quality and dimensional accuracy during rotation, and reduce wear;

[0047] Medium wear resistance and relatively impact resistance (applicable to shaft sleeves and pins): tempering to 300 degrees, heat preservation for 2 hours, air cooling, and proper adjustment of the hardness and toughness balance to ensure that it still has good wear resistance under certain impact conditions, ensuring the reliability of shaft sleeves and pins in equipment operation;

[0048] Low wear resistance and high impact resistance (applicable to impact parts): tempering to 350 degrees for 2 hours and air cooling to reduce hardness and increase toughness, so that the impact parts will not suffer brittle fracture when subjected to large impact forces, while maintaining a certain wear resistance and extending the service life of the parts.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] 1. The cost-effectiveness of the component mold quenching process is significantly improved: In the field of nut production and industrial and mining equipment processing, the traditional model requires enterprises to purchase a large number of molds due to the lack of independent and effective mold quenching technology. Taking nut production as an example, the cost of purchasing molds is high, and due to the incompatibility with the characteristics of the raw materials, a single mold can only produce about 10,000 to 20,000 blanks. The new quenching process successfully overcomes this problem and realizes independent and efficient quenching of the mold. It has been verified in practice that a set of molds processed by this process can produce 80,000 nut blanks, which greatly reduces the frequency and quantity of mold purchases, significantly reduces production costs, saves a lot of money for enterprises, and enhances the price competitiveness of products in the market.

[0051] 2. The component mold quenching process has achieved a leapfrog growth in production efficiency: in the past, the production process was seriously hampered by the frequent replacement of molds. The new quenching process greatly extends the mold life and sharply reduces the number of mold changes by accurately optimizing the mold performance. For example, in the nut processing production line, the mold change time is greatly shortened, the equipment operation time is significantly increased, the production process can be continuously and steadily promoted, and the output has increased significantly, effectively meeting the market's large-scale demand for products, improving the company's production efficiency position in the industry, and helping the company to quickly respond to changes in market orders and obtain more market share.

[0052] 3. The quenching process for this component mold features excellent product quality and equipment performance: Specific quenching processes and data developed for different material molds (such as H13 hot stamping die steel, 40Cr, 45 steel, etc.) ensure an ideal balance between the hardness and toughness of the mold after quenching. In nut processing, the high precision and long lifespan of molds such as forming punches and punching punches are guaranteed, effectively improving the forming accuracy and quality stability of nuts and reducing the scrap rate. At the same time, after this process is applied to the quenching of processing parts for industrial and mining equipment, the wear resistance and impact resistance of the processing parts under complex working conditions are significantly enhanced, the operation reliability of the equipment is improved, and the maintenance frequency is reduced. This not only reduces the impact of equipment downtime on production but also decreases the maintenance labor intensity of industrial workers, creating a more efficient and stable production environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present invention will be further described below in conjunction with the drawings and embodiments:

[0054] Figure 1 is a line graph of the quenching data of the present invention;

[0055] Figure 2 is a line graph of the quenching data of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0056] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0057] In the description of the present invention, it should be understood that for orientation descriptions, such as up, down, front, back, left, right, etc., the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0058] In the description of the present invention, greater than, less than, exceeding, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0059] In the description of the present invention, unless otherwise clearly defined, terms such as set, install, connect, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0060] Please refer to Figure 1-2 , the present invention provides a technical solution: a quenching process for parts molds, including the following specific processes, S1 forming punch quenching process, S2 punching punch quenching process, S3 hexagonal die quenching process, S4 punching die quenching process, S5 straight-through female hexagon sleeve quenching process, S6 straight-through female rod quenching process, S7 core quenching process, S8 turret tapping machine tap fixture quenching process, S9: 40Cr steel mold quenching process and S10: 45 steel and 40Cr, Cr12 workpiece quenching process;

[0061] S1 forming punch quenching process:

[0062] Oxide scale removal and preheating: Use an oxygen torch to remove the oxide scale on the surface of the forming punch, and at the same time monitor the temperature with a temperature measuring gun. Stop heating when the temperature reaches about 1150 degrees. This step aims to remove surface impurities, prepare for subsequent quenching, and ensure uniform heating;

[0063] Cooling treatment: Quickly place the heated forming punch into salt water for cooling. The salt water has a fast cooling rate, which helps to obtain the required hardness. During the cooling process, it is necessary to ensure that all parts of the punch are cooled evenly to prevent deformation or cracks caused by uneven cooling;

[0064] Tempering process;

[0065] First tempering: Place the cooled forming punch into a heating device, heat it to 650 degrees and hold for 2 hours, then cool it naturally in the air. This tempering is mainly to eliminate quenching internal stress, stabilize the structure, and adjust hardness and toughness;

[0066] Second tempering: Heat it again to 615 degrees, hold for 2 hours, and then cool it in the air. Further optimize the mechanical properties of the punch, keep the hardness between Rockwell hardness 46 - 47HRC, meet the use requirements of the forming punch in nut processing, and improve its wear resistance and toughness;

[0067] S2 punching punch quenching process;

[0068] Segmented quenching heating: Adopt a segmented quenching method, use a quenching oxygen torch to heat the punching punch. When the punch just turns red but does not turn white, the temperature measuring gun measures the temperature to reach 1100 degrees, and stop heating. Segmented quenching can obtain different hardness gradients according to the working requirements of different parts of the punch;

[0069] Cooling operation: Immediately place the heated punching punch into engine oil for cooling. The engine oil has a relatively slow cooling rate, which can better control the cooling process, reduce the generation of internal stress, avoid cracks, and at the same time meet the different hardness requirements of different parts of the punch;

[0070] Tempering step;

[0071] The first tempering: Heat up to 350 °C, hold for 2 hours, and then air-cool. Initially adjust the hardness of the front section of the punch to reach between 49 - 51 HRC, ensuring the cutting performance and wear resistance during the punching process;

[0072] The second tempering: Use an intermediate frequency furnace for tempering. When the punch part just turns red, put it into oil for cooling. Further adjust the hardness of the rear section to between 40 - 43 HRC, ensuring the overall performance balance of the punch, and improving its service life and working stability;

[0073] S3 hexagonal die quenching process;

[0074] Heating and holding: Heat the hexagonal die to 1150 °C and hold for 30 minutes. This temperature and holding time can fully austenitize the internal structure of the die, laying a foundation for subsequent cooling transformation and ensuring the uniformity of the overall performance of the die;

[0075] Cooling and tempering;

[0076] Cooling: Use oil cooling. Utilize the cooling characteristics of the oil to obtain appropriate hardness and microstructure, reducing the risk of deformation;

[0077] Tempering: The first tempering is to 620 °C, hold for 2 hours and air-cool. The second tempering is to 580 °C, hold for 2 hours and air-cool. Finally, the hardness of the hexagonal die is stabilized between 46 - 47 HRC, enhancing its wear resistance and anti-deformation ability, and meeting the working conditions requirements of frequent stamping during nut processing;

[0078] S4 punching die quenching process;

[0079] Heating and holding: Heat the punching die to 880 °C and hold for 25 minutes. At this temperature, the microstructure of the die material undergoes transformation to reach the state required for quenching;

[0080] Cooling and shaping: Directly cool without tempering. After cooling, the hardness of the punching die reaches between 54 - 58 HRC. This high hardness can effectively resist wear and deformation during the punching process, ensuring punching accuracy and die life, and is suitable for the specific process requirements of nut punching;

[0081] S5 straight-through female hexagon sleeve quenching process;

[0082] High-temperature heating and holding: Heat the straight-through female hexagon sleeve to 1250 °C and hold for 40 minutes. The high-temperature long-time holding makes the material fully and evenly heated, creating conditions for obtaining good comprehensive performance;

[0083] Cooling and tempering treatment;

[0084] Cooling: First, cool in the air. Utilize the relatively mild nature of air cooling to control the tissue transformation and reduce internal stress;

[0085] Tempering: The first tempering is carried out at 660 °C for 2 hours and then cooled in oil. The second tempering is at 590 °C for 2 hours and cooled in air, so that the hardness is maintained between 48 - 50 HRC, improving its strength and toughness, meeting the mechanical property requirements of the hexagonal sleeve in nut processing, and ensuring its reliability under complex stress conditions;

[0086] Quenching process for S6 straight-through mother rod;

[0087] Heating and holding procedure: Heat the straight-through mother rod to 1250 °C and hold for 40 minutes to ensure the homogenization of the internal structure of the mother rod, laying a foundation for the properties after subsequent quenching and cooling;

[0088] Cooling and tempering process;

[0089] Cooling: Use oil cooling to obtain an appropriate cooling rate and ensure the normal progress of the tissue transformation;

[0090] Tempering: The first tempering is at 665 °C for 2 hours and cooled in air. The second tempering is at 590 °C for 2 hours and cooled in air, so that the hardness of the straight-through mother rod reaches between 49 - 51 HRC, enhancing its wear resistance and fatigue resistance, and adapting to the reciprocating motion and stress conditions in nut processing;

[0091] Quenching process for S7 center punch;

[0092] Oxide scale treatment and heating: Use a quenching oxyacetylene torch to bake and remove the oxide scale on the center punch, measure the temperature with a temperature measuring gun up to 1100 °C, remove the oxide scale to ensure the heating effect, and the appropriate heating temperature provides conditions for subsequent quenching;

[0093] Cooling and tempering: After water cooling, hold at 580 °C for 2 hours and then cool in air, so that the hardness of the center punch reaches between 43 - 55 HRC. Water cooling obtains a higher hardness, and tempering adjusts the structure and properties to ensure that the center punch can meet the hardness requirements and has a certain toughness in nut processing, preventing fracture and failure;

[0094] Quenching process for the tap clamp of S8 turret tapping machine;

[0095] Heating and cooling: Use a quenching oxyacetylene torch to bake and remove the oxide scale and heat up to 1100 °C and then water cool. Rapid heating and water cooling enable the tap clamp to obtain a higher hardness, meeting the wear resistance requirements during tapping and preventing the wear of the clamp from affecting the thread processing accuracy;

[0096] Tempering operation: Temper to 310 °C and hold for 2 hours and cool in air, stabilizing the hardness between 51 - 53 HRC, and at the same time eliminating part of the internal stress, improving the comprehensive mechanical properties and service life of the clamp;

[0097] S9: Quenching process for 40Cr steel die;

[0098] Heating and holding process: Heat the 40Cr steel mold to 860 degrees and hold it for 25 minutes. This temperature and time can make the 40Cr steel reach a suitable degree of austenitization, prepare for the subsequent cooling transformation, and meet the mold's requirements for organization and performance;

[0099] Cooling and tempering: After the oil is cooled, keep it at 250 degrees for 2 hours and then air cool it. The oil cooling controls the cooling speed, and the tempering adjusts the structure and performance to make the mold have moderate hardness and good wear resistance. It is suitable for industrial and mining mold processing scenarios with high wear resistance requirements and no impact or less impact;

[0100] S10: Quenching process for 45 steel and 40Cr, Cr12 machined parts;

[0101] Heating and cooling: Bake with oxygen until it turns red, measure the temperature with a temperature gun to about 950 degrees and then cool with water. This heating and cooling method enables the workpiece to obtain a higher hardness and meet its basic use requirements in different industrial and mining equipment, such as the wear resistance requirements of gears and wheels;

[0102] Tempering classification treatment, high wear resistance and no impact (suitable for gears and wheels): tempering to 200 degrees for 2 hours and air cooling to further improve hardness and wear resistance, ensure good surface quality and dimensional accuracy during rotation, and reduce wear;

[0103] Medium wear resistance and relatively impact resistance (applicable to shaft sleeves and pins): tempering to 300 degrees, heat preservation for 2 hours, air cooling, and proper adjustment of the hardness and toughness balance to ensure that it still has good wear resistance under certain impact conditions, ensuring the reliability of shaft sleeves and pins in equipment operation;

[0104] Low wear resistance and high impact resistance (applicable to impact parts): tempering to 350 degrees for 2 hours and air cooling to reduce hardness and increase toughness, so that the impact parts will not suffer brittle fracture when subjected to large impact forces, while maintaining a certain wear resistance and extending the service life of the parts.

[0105] The cost-effectiveness of this process is significantly improved: In the field of nut production and industrial and mining equipment processing, under the traditional model, due to the lack of independent and effective mold quenching technology, enterprises need to purchase a large number of molds from outside. Taking nut production as an example, the cost of purchasing molds from outside is high, and due to the incompatibility with the characteristics of the raw materials, a single mold can only produce about 10,000 to 20,000 blanks. The new quenching process successfully overcomes this problem and realizes independent and efficient quenching of the mold. It has been verified in practice that a set of molds processed by this process can produce 80,000 nut blanks, which greatly reduces the frequency and quantity of mold purchases, significantly reduces production costs, saves a lot of money for enterprises, and enhances the price competitiveness of products in the market;

[0106] The production efficiency of this process has achieved a leapfrog increase: In the past, the frequent mold replacement problem severely hindered the production process. The new quenching process precisely optimizes the mold performance, significantly extends the mold life, sharply reduces the number of mold replacements. For example, in the nut processing production line, the mold replacement time is greatly shortened, the equipment operation time is significantly increased, the production process can be continuously and stably promoted, the output has increased significantly, effectively meeting the large-scale market demand for products, enhancing the enterprise's position in the industry in terms of production efficiency, helping the enterprise quickly respond to changes in market orders, and obtaining more market share;

[0107] This process has excellent product quality and equipment performance: The specific quenching process and data developed for different material molds (such as H13 hot stamping die steel, 40Cr, 45 steel, etc.) ensure that the hardness and toughness of the mold reach an ideal balance after quenching. In nut processing, the high precision and long life of molds such as forming punches and punching punches are guaranteed, effectively improving the forming accuracy and quality stability of nuts and reducing the scrap rate. At the same time, after this process is applied to the quenching of processing parts for industrial and mining equipment, the wear resistance and impact resistance of the processing parts under complex working conditions are significantly enhanced, the operation reliability of the equipment is improved, and the maintenance frequency is reduced. This not only reduces the impact of equipment downtime on production but also reduces the maintenance labor intensity of industrial workers, creating a more efficient and stable production environment.

[0108] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A quenching process for a parts mold, characterized in that: It includes the following specific processes: S1 forming punch quenching process, S2 punching punch quenching process, S3 hexagonal die quenching process, S4 punching die quenching process, S5 straight-through female hexagon sleeve quenching process, S6 straight-through female rod quenching process, S7 core quenching process, S8 turret tapping machine tap fixture quenching process, S9: 40Cr steel die quenching process, and S10: 45 steel and 40Cr, Cr12 workpiece quenching process.

2. The quenching process of a component mold according to claim 1, characterized in that: The S1 forming punch quenching process: Scale removal and preheating: Use an oxygen torch to remove the scale on the surface of the forming punch, and at the same time monitor the temperature with a temperature gun. Stop heating when the temperature reaches about 1150 degrees. This step aims to remove surface impurities, prepare for subsequent quenching, and ensure uniform heating. Cooling treatment: Quickly put the heated forming punch into salt water for cooling. The salt water has a fast cooling rate, which helps to obtain the required hardness. During the cooling process, it is necessary to ensure that all parts of the punch are cooled evenly to prevent deformation or cracks caused by uneven cooling. Tempering process; First tempering: Put the cooled forming punch into a heating device, heat it up to 650 degrees and hold for 2 hours, then cool it naturally in the air. This tempering is mainly to eliminate the internal stress of quenching, stabilize the structure, and adjust the hardness and toughness. Second tempering: Heat it up again to 615 degrees, hold for 2 hours and then air-cool. Further optimize the mechanical properties of the punch, keep the hardness between Rockwell hardness 46-47HRC, meet the use requirements of the forming punch in nut processing, and improve its wear resistance and toughness.

3. A quenching process for a component mold according to claim 1, characterized in that: The S2 punching punch quenching process; Segmented quenching heating: Adopt the segmented quenching method, use a dipping oxyacetylene torch to heat the punching punch. When the punch just turns red but not white, use a temperature gun to measure the temperature reaching 1100 degrees and stop heating. Segmented quenching can obtain different hardness gradients according to the working requirements of different parts of the punch. Cooling operation: Immediately put the heated punching punch into machine oil for cooling. The cooling rate of machine oil is relatively slow, which can better control the cooling process, reduce the generation of internal stress, avoid cracks, and at the same time meet the different hardness requirements of different parts of the punch. Tempering step; First tempering: Heat it up to 350 degrees, hold for 2 hours and then air-cool to initially adjust the hardness of the front section of the punch to between 49-51HRC, ensuring the cutting performance and wear resistance during the punching process. Second tempering: Use an intermediate frequency furnace for tempering. When the part of the punch just turns red, put it into machine oil for cooling, and further adjust the hardness of the rear section to between 40-43HRC to ensure the overall performance balance of the punch, improve its service life and working stability.

4. A quenching process for a parts mold according to claim 1, characterized in that: The S3 hexagonal die quenching process; Heating and holding: Heat the hexagonal die to 1150 degrees and hold for 30 minutes. This temperature and holding time can fully austenitize the internal structure of the die, lay the foundation for subsequent cooling transformation, and ensure the uniformity of the overall performance of the die. Cooling and tempering; Cooling: Use machine oil for cooling, utilize the cooling characteristics of machine oil to obtain appropriate hardness and tissue morphology, and reduce the risk of deformation; Tempering: The first tempering is carried out to 620 °C for 2 hours with air cooling, and the second tempering is carried out to 580 °C for 2 hours with air cooling, finally stabilizing the hardness of the hexagonal die between 46 - 47 HRC, enhancing its wear resistance and anti-deformation ability, and meeting the working conditions requirements of frequent stamping during nut processing.

5. A quenching process for a parts mold according to claim 1, characterized in that: The quenching process of the S4 punching die; Heating and holding: Heat the punching die to 880 °C and hold for 25 minutes. At this temperature, the microstructure of the die material undergoes transformation to reach the state required for quenching. Cooling and shaping: Direct cooling is carried out without tempering operation. After cooling, the hardness of the punching die reaches between 54 - 58 HRC. This high hardness can effectively resist wear and deformation during the punching process, ensuring punching accuracy and die life, and is suitable for the specific process requirements of nut punching.

6. A quenching process for a component mold according to claim 1, characterized in that: The quenching process of the S5 straight-through female hexagon sleeve; High-temperature heating and holding: Heat the straight-through female hexagon sleeve to 1250 °C and hold for 40 minutes. The long-time high-temperature holding enables the material to be uniformly heated, creating conditions for obtaining good comprehensive performance. Cooling and tempering treatment; Cooling: First, cool in air. Utilize the relatively gentle nature of air cooling to control the tissue transformation and reduce internal stress. Tempering: The first tempering is carried out to 660 °C for 2 hours with oil cooling, and the second tempering is carried out to 590 °C for 2 hours with air cooling, keeping the hardness between 48 - 50 HRC, improving its strength and toughness, meeting the mechanical property requirements of the hexagon sleeve during nut processing, and ensuring its reliability in a complex stress environment.

7. A quenching process for a parts mold according to claim 1, characterized in that: The quenching process of the S6 straight-through female rod; Heating and holding procedure: Heat the straight-through female rod to 1250 °C and hold for 40 minutes to ensure the uniformity of the internal structure of the rod, laying the foundation for the performance after subsequent quenching and cooling. Cooling and tempering process; Cooling: Use oil cooling to obtain an appropriate cooling rate to ensure the normal progress of tissue transformation. Tempering: The first tempering is carried out to 665 °C for 2 hours with air cooling, and the second tempering is carried out to 590 °C for 2 hours with air cooling, making the hardness of the straight-through female rod reach between 49 - 51 HRC, enhancing its wear resistance and anti-fatigue performance, and adapting to the reciprocating motion and stress conditions during nut processing.

8. A quenching process for a component mold according to claim 1, characterized in that: The quenching process of the S7 center punch; Oxide scale treatment and heating: Use a quenching oxyacetylene torch to bake and remove the oxide scale of the center punch, measure the temperature with a temperature measuring gun up to 1100 °C, remove the oxide scale to ensure the heating effect, and the appropriate heating temperature provides conditions for subsequent quenching. Cooling and tempering: After water cooling, hold at 580 °C for 2 hours with air cooling, making the hardness of the center punch reach between 43 - 55 HRC. Water cooling obtains a higher hardness, and tempering adjusts the structure and performance to ensure that the center punch can meet the hardness requirements and have a certain toughness during nut processing, preventing fracture and failure.

9. A quenching process for a parts mold according to claim 1, characterized in that: The quenching process of the S8 tap clamp of the rotary threading machine; Heating and cooling: Use a quenching oxyacetylene torch to bake and remove the oxide scale and heat up to 1100 °C followed by water cooling. The rapid heating and water cooling enable the tap clamp to obtain a higher hardness, meeting its wear resistance requirements during the threading process and preventing the wear of the clamp from affecting the threading accuracy. Tempering operation: Temper to 310 degrees for 2 hours and air cool to stabilize the hardness between 51-53HRC, while eliminating some internal stress and improving the comprehensive mechanical properties and service life of the fixture.

10. A quenching process for a component mold according to claim 1, characterized in that: S9: 40Cr steel die quenching process; Heating and holding process: Heat the 40Cr steel mold to 860 degrees and hold it for 25 minutes. This temperature and time can make the 40Cr steel reach a suitable degree of austenitization, prepare for the subsequent cooling transformation, and meet the mold's requirements for organization and performance; Cooling and tempering: After the oil is cooled, keep it at 250 degrees for 2 hours and then air cool it. The oil cooling controls the cooling speed, and the tempering adjusts the structure and performance to make the mold have moderate hardness and good wear resistance. It is suitable for industrial and mining mold processing scenarios with high wear resistance requirements and no impact or less impact; S10: Quenching process for 45 steel and 40Cr, Cr12 machined parts; Heating and cooling: Bake with oxygen until it turns red, measure the temperature with a temperature gun to about 950 degrees and then cool with water. This heating and cooling method enables the workpiece to obtain a higher hardness and meet its basic use requirements in different industrial and mining equipment, such as the wear resistance requirements of gears and wheels; Tempering classification treatment, high wear resistance and no impact (suitable for gears and wheels): tempering to 200 degrees for 2 hours and air cooling to further improve hardness and wear resistance, ensure good surface quality and dimensional accuracy during rotation, and reduce wear; Medium wear resistance and relatively impact resistance (applicable to shaft sleeves and pins): tempering to 300 degrees, heat preservation for 2 hours, air cooling, and proper adjustment of the hardness and toughness balance to ensure that it still has good wear resistance under certain impact conditions, ensuring the reliability of shaft sleeves and pins in equipment operation; Low wear resistance and high impact resistance (applicable to impact parts): tempering to 350 degrees for 2 hours and air cooling to reduce hardness and increase toughness, so that the impact parts will not suffer brittle fracture when subjected to large impact forces, while maintaining a certain wear resistance and extending the service life of the parts.

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