Forming die of hard alloy double-head horn nozzle and machining and forming method of hard alloy double-head horn nozzle

Abstract

The invention discloses a forming die of a hard alloy double-end horn nozzle and a machining forming method of the hard alloy double-end horn nozzle, belongs to the technical field of alloy forming, and solves the problem that in the prior art, when the hard alloy double-end horn nozzle is formed, demolding is difficult. A combined core rod is installed in the forming cavity, an upper punching piece and a lower punching piece are arranged between the two ends of the combined core rod and the female die in a sleeved mode respectively, the end, facing the outer portion of the female die, of the upper punching piece extends out of the female die, and the end face, facing the outer portion of the female die, of the lower punching piece and the outer surface of the female die are located on the same horizontal plane. And an alloy blank pressing cavity is formed among the upper punching piece, the lower punching piece, the combined core rod and the female die. According to the forming process mold for the hard alloy double-head horn-shaped nozzle, demolding can be conveniently conducted through the combined detachable core rod.

Description

Technical Field

[0001] The invention belongs to the technical field of alloy forming, and in particular relates to a forming die of a cemented carbide double-headed trumpet nozzle and a processing method thereof. Background Art

[0002] In the field of cemented carbide nozzle manufacturing, double-headed trumpet nozzles often face the problem of difficult demoulding during the molding process due to their special structure. Traditional mold design often cannot effectively deal with this problem, resulting in low production efficiency and even damage to the mold and nozzle products. Therefore, the development of a new molding mold that can effectively solve the demoulding problem of double-headed trumpet products has important practical value and market demand. Summary of the invention

[0003] The objects of the present invention are:

[0004] In order to solve the problem of difficulty in demoulding during molding of a cemented carbide double-headed trumpet nozzle in the prior art, a molding mold for a cemented carbide double-headed trumpet nozzle and a processing method thereof are provided.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A forming die for a cemented carbide double-ended trumpet nozzle comprises a female die, a forming cavity is arranged inside the female die, a combined core rod is installed in the forming cavity, an upper punch and a lower punch are respectively sleeved between the two ends of the combined core rod and the female die, one end of the upper punch facing the outside of the female die extends out of the female die, and an end face of the lower punch facing the outside of the female die is arranged in the same horizontal plane as the outer surface of the female die, and an alloy blank cavity is arranged between the upper punch, the lower punch, the combined core rod and the female die.

[0007] Furthermore, the end faces of both ends of the combined core rod are respectively arranged in the same horizontal plane as the outer surface of the female mold, and the inner diameter and outer diameter of the upper punch are respectively the same as the inner diameter and outer diameter of the lower punch.

[0008] Furthermore, the combined core rod comprises a core rod body, one end of the core rod body is sleeved with a core rod taper fitting, and one end surface of the core rod taper fitting is connected to a core rod fastening nut sleeved on the core rod body.

[0009] Furthermore, the core rod body includes an upper punch mounting section, the upper punch mounting section is connected to an upper horn forming section, the upper horn forming section is connected to an intermediate forming section, the tapered portion of the core rod taper fitting forms a lower horn forming section, and the cylindrical section composed of the portion other than the taper of the core rod taper fitting and the core rod fastening nut is the lower punch mounting section.

[0010] A method for processing a forming die of a cemented carbide double-headed trumpet nozzle comprises the following steps:

[0011] Step A: Mold preparation: Check whether the female mold, combined core rod, upper punch and lower punch are intact and ensure the cleanliness of all parts;

[0012] Step B: Material preparation: Place an appropriate amount of cemented carbide material into the molding cavity of the female mold, ensuring that the material is evenly distributed without bubbles or impurities;

[0013] Step C: Install the modular core rod: accurately install the modular core rod in the molding cavity of the female mold, and ensure that the core rod body, the core rod taper accessories and the core rod fastening nut are tightly assembled without looseness;

[0014] Step D: Apply pressure to form: Start the press and apply pressure to the carbide material in the female mold through the upper punch and the lower punch. The pressure needs to be gradually increased to the set value and maintained for a period of time to ensure that the material flows fully and forms;

[0015] Step E: Cooling and solidification: While maintaining the pressure, the mold is cooled so that the cemented carbide material solidifies quickly after molding and maintains a stable shape;

[0016] Step F: Dismantle the mold and take out the product: After the material is completely solidified, release the pressure first, then dismantle the upper punch, the combined core rod and the lower punch in turn, and finally take out the formed carbide double-headed trumpet nozzle from the female mold.

[0017] Furthermore, the pressure in step D is determined according to material properties and product requirements, and the pressure is between 500MPa and 2000MPa; the holding time is determined according to material compressibility and product complexity, and the range is 5 minutes to 30 minutes.

[0018] Furthermore, the cooling method in step E adopts any one or both of water cooling and air cooling, and the cooling time is determined according to the material properties and the mold size, and ranges from 10 minutes to 2 hours.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] The invention solves the problem of difficulty in demoulding the double-headed horn product pressed blank, and improves production efficiency and product quality. The design of the combined core rod makes the mold more flexible and adaptable, and can produce double-headed horn nozzles of different specifications and shapes. The mold has a simple structure, is easy to manufacture and maintain, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the mold assembly diagram of the present invention;

[0022] Figure 2 It is a structural diagram of the core rod of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a core rod for removing a green compact from the present invention;

[0024] Figure 4 It is a schematic diagram of the mold state in the mixed material pre-loading stage of the present invention.

[0025] Markings in the figure: 1- female die, 2- combined core rod, 3- upper punch, 4- lower punch, 5- alloy blank cavity, 6- core rod body, 7- core rod taper fitting, 8- core rod fastening nut, 9- upper punch installation section, 10- upper horn forming section, 11- middle forming section, 12- lower horn forming section, 13- lower punch installation section. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] A forming die for a cemented carbide double-ended trumpet nozzle, characterized in that it comprises a female die 1, a forming cavity is arranged inside the female die 1, a combined core rod 2 is installed in the forming cavity, an upper punch 3 and a lower punch 4 are respectively sleeved between the two ends of the combined core rod 2 and the female die 1, an end of the upper punch 3 facing the outside of the female die 1 extends out of the female die 1, an end face of the lower punch 4 facing the outside of the female die 1 is located in the same horizontal plane as the outer surface of the female die 1, and an alloy blank cavity 5 is arranged between the upper punch 3, the lower punch 4, the combined core rod 2 and the female die 1.

[0028] The end surfaces of both ends of the combined core rod 2 are respectively arranged at the same horizontal plane as the outer surface of the female mold 1, and the inner diameter and outer diameter of the upper punch 3 are respectively the same as the inner diameter and outer diameter of the lower punch 4.

[0029] The combined core rod 2 comprises a core rod body 6 , one end of which is sleeved with a core rod taper fitting 7 , and one end surface of the core rod taper fitting 7 is connected with a core rod fastening nut 8 sleeved on the core rod body 6 .

[0030] The core rod body 6 includes an upper punch 3 mounting section, the upper punch 3 mounting section is connected to an upper horn forming section 10, the upper horn forming section 10 is connected to an intermediate forming section 11, the tapered portion of the core rod taper fitting 7 forms a lower horn forming section 12, and the cylindrical section composed of the portion other than the taper of the core rod taper fitting 7 and the core rod fastening nut 8 is the lower punch 4 mounting section.

[0031] Mold structure: The mold is mainly composed of a female mold 1, an upper punch, a lower punch and a combined core rod. The female mold 1 is used to form the basic shape of the nozzle, and the upper punch and the lower punch are used to apply pressure to form the cemented carbide material into the desired shape in the female mold 1. The combined core rod is detachable and consists of multiple core rod parts to form the special structure of the double-headed trumpet nozzle.

[0032] Removable combined core rod: The combined core rod is composed of multiple core rod parts, which are connected to achieve removable assembly. During the molding process, the combination of core rod parts can be adjusted as needed to adapt to the production of double-headed trumpet nozzles of different specifications and shapes.

[0033] Working principle: During the forming process, the carbide material is first placed in the female mold 1, and then the combined core rod is installed. Next, the material is pressed by the upper and lower punches, so that it is formed into the desired shape under the combined action of the female mold 1 and the combined core rod. Finally, when the product is formed, it can be removed from the mold by disassembling the combined core rod.

[0034] The invention solves the problem of difficulty in demoulding the double-headed horn product pressed blank, and improves production efficiency and product quality. The design of the combined core rod makes the mold more flexible and adaptable, and can produce double-headed horn nozzles of different specifications and shapes. The mold has a simple structure, is easy to manufacture and maintain, and reduces production costs.

[0035] The molding method of the molding die of the present invention is specifically described below by way of examples:

[0036] Example 1

[0037] A method for processing a forming die of a cemented carbide double-headed trumpet nozzle comprises the following steps:

[0038] Step A: Mold preparation: Check whether the female mold 1, the combined core rod 2, the upper punch 3 and the lower punch 4 are intact and ensure the cleanliness of all parts;

[0039] Step B: Material preparation: Place an appropriate amount of cemented carbide material into the molding cavity of the female mold 1, ensuring that the material is evenly distributed without bubbles or impurities;

[0040] Step C: Installing the modular core rod 2: Accurately install the modular core rod 2 in the molding cavity of the female mold 1, ensuring that the core rod body 6, the core rod taper fitting 7 and the core rod fastening nut 8 are tightly assembled without looseness;

[0041] Step D: Apply pressure to form: Start the press machine and apply pressure to the cemented carbide material in the female mold 1 through the upper punch 3 and the lower punch 4. The pressure needs to be gradually increased to the set value and maintained for a period of time to ensure that the material fully flows and forms;

[0042] The pressure is determined according to the material properties and product requirements, and the pressure is 1000MPa; the holding time is determined according to the material compressibility and product complexity, and can be set to 20 minutes.

[0043] Step E: Cooling and solidification: While maintaining the pressure, the mold is cooled so that the cemented carbide material solidifies quickly after molding and maintains a stable shape;

[0044] The cooling method adopts either water cooling or air cooling or both. The cooling time is determined according to the material properties and the mold size and can be set to 1 hour.

[0045] Step F: Disassembling the mold and taking out the product: After the material is completely solidified, first release the pressure, then disassemble the upper punch 3, the combined core rod 2 and the lower punch 4 in sequence, and finally take out the formed carbide double-headed trumpet nozzle from the female mold 1.

[0046] Example 2

[0047] A method for processing a forming die of a cemented carbide double-headed trumpet nozzle comprises the following steps:

[0048] Step A: Mold preparation: Check whether the female mold 1, the combined core rod 2, the upper punch 3 and the lower punch 4 are intact and ensure the cleanliness of all parts;

[0049] Step B: Material preparation: Place an appropriate amount of cemented carbide material into the molding cavity of the female mold 1, ensuring that the material is evenly distributed without bubbles or impurities;

[0050] Step C: Installing the modular core rod 2 Accurately install the modular core rod 2 in the molding cavity of the female mold 1, ensuring that the core rod body 6, the core rod taper fitting 7 and the core rod fastening nut 8 are tightly assembled without looseness;

[0051] Step D: Apply pressure to form: Start the press machine and apply pressure to the cemented carbide material in the female mold 1 through the upper punch 3 and the lower punch 4. The pressure needs to be gradually increased to the set value and maintained for a period of time to ensure that the material fully flows and forms;

[0052] The pressure is determined according to the material properties and product requirements, and the pressure is 500MPa; the holding time is determined according to the material compressibility and product complexity, and is set to 30 minutes.

[0053] Step E: Cooling and solidification: While maintaining the pressure, the mold is cooled so that the cemented carbide material solidifies quickly after molding and maintains a stable shape;

[0054] The cooling method adopts either or both of water cooling and air cooling. The cooling time is determined according to the material properties and the mold size and can be set to 10 minutes.

[0055] Step F: Disassembling the mold and taking out the product: After the material is completely solidified, first release the pressure, then disassemble the upper punch 3, the combined core rod 2 and the lower punch 4 in sequence, and finally take out the formed carbide double-headed trumpet nozzle from the female mold 1.

[0056] Example 3

[0057] A method for processing a forming die of a cemented carbide double-headed trumpet nozzle comprises the following steps:

[0058] Step A: Mold preparation: Check whether the female mold 1, the combined core rod 2, the upper punch 3 and the lower punch 4 are intact and ensure the cleanliness of all parts;

[0059] Step B: Material preparation: Place an appropriate amount of cemented carbide material into the molding cavity of the female mold 1, ensuring that the material is evenly distributed without bubbles or impurities;

[0060] Step C: Installing the modular core rod 2 Accurately install the modular core rod 2 in the molding cavity of the female mold 1, ensuring that the core rod body 6, the core rod taper fitting 7 and the core rod fastening nut 8 are tightly assembled without looseness;

[0061] Step D: Apply pressure to form: Start the press machine and apply pressure to the cemented carbide material in the female mold 1 through the upper punch 3 and the lower punch 4. The pressure needs to be gradually increased to the set value and maintained for a period of time to ensure that the material fully flows and forms;

[0062] The pressure is determined according to the material properties and product requirements, and the pressure is 2000MPa; the holding time is determined according to the material compressibility and product complexity, and can be set to 5 minutes.

[0063] Step E: Cooling and solidification: While maintaining the pressure, the mold is cooled so that the cemented carbide material solidifies quickly after molding and maintains a stable shape;

[0064] The cooling method adopts either water cooling or air cooling or both. The cooling time is determined according to the material properties and the mold size and can be set to 2 hours.

[0065] Step F: Disassembling the mold and taking out the product: After the material is completely solidified, first release the pressure, then disassemble the upper punch 3, the combined core rod 2 and the lower punch 4 in sequence, and finally take out the formed carbide double-headed trumpet nozzle from the female mold 1.

[0066] It should be noted that controlling the holding time is a crucial link in the cemented carbide forming process, which directly affects the density, dimensional accuracy, surface quality and mechanical properties of the product. In order to effectively control the holding time, you can start from the following aspects:

[0067] Alloy material and particle size: Different cemented carbide materials and particle sizes have different requirements for holding time. Generally speaking, finer-grained materials require shorter holding times, while coarser-grained materials require longer holding times to ensure full bonding between particles.

[0068] Material compressibility: The compressibility of the material will also affect the holding time. Materials with better compressibility can reach the required density in a shorter time, while materials with poor compressibility require longer holding time.

[0069] Product shape and size: Products with complex shapes and larger sizes require longer holding times to ensure that all parts are fully compacted and cured.

[0070] Performance requirements: Determine the appropriate holding time based on the product's performance and mechanical performance requirements. For example, for products that require high strength and hardness, a longer holding time may be required to ensure the density and mechanical properties of the material.

[0071] Pressure control: During the holding phase, the pressure should be stable and evenly distributed throughout the mold. By precisely controlling the pressure and pressure distribution, the holding time can be optimized and the product quality can be improved.

[0072] Temperature control: Appropriate mold temperature helps the material flow and solidification. By accurately controlling the mold temperature, the holding time can be shortened or extended to meet different production needs.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A forming die for a cemented carbide double-ended trumpet nozzle, characterized in that: It includes a female mold, a forming cavity is arranged inside the female mold, a combined core rod is installed in the forming cavity, an upper punch and a lower punch are respectively sleeved between the two ends of the combined core rod and the female mold, one end of the upper punch facing the outside of the female mold extends out of the female mold, and the end face of the lower punch facing the outside of the female mold is located in the same horizontal plane as the outer surface of the female mold, and an alloy blank cavity is arranged between the upper punch, the lower punch, the combined core rod and the female mold.

2. The forming die of a cemented carbide double-ended trumpet nozzle according to claim 1, characterized in that: The end surfaces of both ends of the combined core rod are respectively arranged in the same horizontal plane as the outer surface of the female mold, and the inner diameter and outer diameter of the upper punch are respectively the same as the inner diameter and outer diameter of the lower punch.

3. The forming die of a cemented carbide double-ended trumpet nozzle according to claim 1, characterized in that: The combined core rod comprises a core rod body, one end of which is sleeved with a core rod taper fitting, and one end surface of the core rod taper fitting is connected with a core rod fastening nut sleeved on the core rod body.

4. The forming die of a cemented carbide double-ended trumpet nozzle according to claim 3, characterized in that: The core rod body includes an upper punch mounting section, the upper punch mounting section is connected to an upper horn forming section, the upper horn forming section is connected to an intermediate forming section, the tapered portion of the core rod taper fitting forms a lower horn forming section, and the cylindrical section composed of the portion other than the taper of the core rod taper fitting and the core rod fastening nut is the lower punch mounting section.

5. A method for processing a forming die of a cemented carbide double-headed trumpet nozzle, characterized in that: The steps include: Step A: Mold preparation: Check whether the female mold, combined core rod, upper punch and lower punch are intact and ensure the cleanliness of all parts; Step B: Material preparation: Place an appropriate amount of cemented carbide material into the molding cavity of the female mold, ensuring that the material is evenly distributed without bubbles or impurities; Step C: Install the modular core rod: accurately install the modular core rod in the molding cavity of the female mold, and ensure that the core rod body, the core rod taper accessories and the core rod fastening nut are tightly assembled without looseness; Step D: Apply pressure to form: Start the press and apply pressure to the carbide material in the female mold through the upper punch and the lower punch. The pressure needs to be gradually increased to the set value and maintained for a period of time to ensure that the material flows fully and forms; Step E: Cooling and solidification: While maintaining the pressure, the mold is cooled so that the cemented carbide material solidifies quickly after molding and maintains a stable shape; Step F: Dismantle the mold and take out the product: After the material is completely solidified, release the pressure first, then dismantle the upper punch, the combined core rod and the lower punch in turn, and finally take out the formed carbide double-headed trumpet nozzle from the female mold.

6. The method for processing a forming die of a cemented carbide double-ended trumpet nozzle according to claim 5, characterized in that: The pressure in step D is determined according to the material properties and product requirements, and the pressure is between 500MPa and 2000MPa; the holding time is determined according to the material compressibility and product complexity, and the range is 5 minutes to 30 minutes.

7. The method for processing a forming die of a cemented carbide double-ended trumpet nozzle according to claim 5, characterized in that: The cooling method in step E is either water cooling or air cooling or both. The cooling time is determined according to the material properties and the mold size, and ranges from 10 minutes to 2 hours.

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