Machining device for helicopter rotor wing forming

Abstract

The invention relates to the technical field of rotor wing forming, in particular to a machining device for helicopter rotor wing forming, which comprises a lower mold core and an upper mold core matched with the lower mold core, the upper mold core is provided with a pouring gate, and the lower mold core and the upper mold core are jointly provided with a circulation mechanism. According to the machining device for helicopter rotor wing forming, high-pressure inert gas is controlled to enter the cavity through the air valve, pressure is applied synchronously in the casting process, and the density of a casting is improved; the reserved cavity on the right side serves as a molten metal buffer area, inert gas pressure adjustment is matched, it is guaranteed that the complex cavity is evenly filled with molten metal, and the problems of cold shut or insufficient filling are solved; and the sealing mechanism maintains a high-temperature and high-pressure environment, so that casting and HIP are completed in the same die cavity, the defect of secondary oxidation or cooling caused by a traditional step-by-step process is avoided, the production period is shortened, and the design of integration of pressing die casting and HIP and dynamic pressurization of inert gas is adopted, so that batch production of high-precision complex connecting rods is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rotor forming, in particular to a processing device for helicopter rotor forming. BACKGROUND

[0002] The helicopter rotor (as shown in Figure 10 ) is the core component of the helicopter to generate lift and propulsion force, which is mainly composed of blades, hubs, control systems and the like, and air power is generated by rotation to realize the flight of the helicopter. As a key component of the rotor control system, the complex connecting rod (as shown in Figure 11 ) transmits the pilot's control input to the blade to achieve the functions of controlling the pitch change, adjusting the flapping motion of the blade and absorbing the vibration load of the rotor. Therefore, when manufacturing the complex connecting rod, die casting forging is needed to improve the density of the complex connecting rod, so as to ensure the flight stability, maneuverability and structural safety.

[0003] However, there are the following problems in the die casting forging of the complex connecting rod of the helicopter rotor. In the traditional die casting, the complex connecting rod has a complex internal structure of the cavity due to its shape, which may cause defects such as cold shut and porosity in the casting due to insufficient metal liquid flowability, affecting the mechanical properties of the part. Moreover, the conventional die casting or hot isostatic pressing (HIP) process cannot real-time control the pressure distribution in the cavity during the casting stage, resulting in uneven densification of the complex connecting rod. In addition, the metal liquid is easy to react with the air in the cavity during the casting process to generate inclusions. Moreover, the existing process needs to be transported to the hot isostatic pressing (HIP) equipment for secondary processing after casting, resulting in long production cycle, high energy consumption, and deformation or oxidation caused by intermediate cooling, which may reduce the structural strength of the complex connecting rod. SUMMARY

[0004] In view of the above or the problems of insufficient metal liquid flowability and step-by-step processing of casting and hot isostatic pressing in the prior art, the present application is proposed.

[0005] In order to solve the above technical problems, the present application provides a processing device for helicopter rotor forming, which is achieved by the following specific technical means: A processing device for helicopter rotor forming, comprising a lower mold core and an upper mold core matched therewith, a sprue is formed on the upper mold core, and a flow-through mechanism is arranged on the lower mold core and the upper mold core; the flow-through mechanism comprises a cavity for casting multiple complex connecting rods composed of the lower mold core and the upper mold core, a left and right distributed reserved cavity is arranged in the cavity, a gas valve corresponding to and communicating with the reserved cavity is fixedly installed on the upper mold core, and the gas valve controls the high-pressure inert gas flow to enter or exit the cavity; The right reserved cavity is connected with the lower end of the sprue, heating rods are arranged in the lower mold core and the upper mold core, and a sealing mechanism for sealing and heat preservation of the lower mold core and the upper mold core is arranged outside the lower mold core and the upper mold core. The circulation mechanism cooperates with the sealing mechanism and is used for high-pressure die casting and hot isostatic pressing of a plurality of complex connecting rods in the lower mold core and the upper mold core.

[0006] Optionally, the lower mold core is composed of a lower bottom plate and an upper lower mold module, the upper mold core is composed of an upper cage frame and a lower upper mold module, and the lower mold module and the upper mold module form a cavity and a reserved cavity.

[0007] Optionally, the lower mold core and the upper mold core are both made of ceramic matrix composites, a plurality of positioning columns are arranged on the lower mold core, a plurality of positioning holes corresponding to the positioning columns are arranged on the upper mold core, and the lower mold core and the upper mold core are connected by inserting the positioning columns into the positioning holes.

[0008] Optionally, the locking mechanism further comprises a plurality of bolts penetrating the upper mold core in an array and being threadedly connected with the upper mold core, a plurality of screw holes corresponding to the bolts are arranged on the lower mold core, and a plug-in assembly for locking the bolts is arranged on the lower mold core.

[0009] Optionally, the plug-in assembly comprises a sliding groove arranged at the screw hole, an insertion slot penetrating the lower end of the outer ring wall of the bolt, a wedge block slidably arranged in the sliding groove and the corresponding insertion slot, and a reset plate slidably arranged in the sliding groove by the spring.

[0010] Optionally, the sealing mechanism comprises a lower sealing plate arranged below the lower mold core, a front-rear symmetric first side plate and a left-right symmetric second side plate arranged on the lower sealing plate, and an upper sealing plate arranged above the lower sealing plate, wherein the left-right symmetric second side plate, the front-rear symmetric first side plate, the lower sealing plate and the upper sealing plate are arranged outside the lower mold core and the upper mold core.

[0011] Optionally, a plurality of positioning plates for positioning the lower mold core are fixedly arranged on the upper end surface of the lower sealing plate, a plurality of limiting sliding blocks are fixedly arranged on the lower end of the left-right symmetric second side plate and the front-rear symmetric first side plate, and a plurality of limiting sliding grooves corresponding to the limiting sliding blocks are arranged on the upper end surface of the lower sealing plate.

[0012] Optionally, a plurality of left-right symmetric first insertion rods are fixedly arranged on the side wall of the left-right symmetric second side plate, a plurality of first insertion holes corresponding to the insertion rods are arranged on the front-rear symmetric first side plate, and a plurality of second insertion holes are arranged on the upper end of the left-right symmetric second side plate and the front-rear symmetric first side plate, wherein a plurality of second insertion rods corresponding to the second insertion holes are fixedly arranged on the lower end surface of the upper sealing plate.

[0013] Optionally, a heat preservation layer is arranged on the end of the left-right symmetric second side plate, the front-rear symmetric first side plate, the lower sealing plate and the upper sealing plate, and the upper sealing plate and the left-right symmetric second side plate are fixedly connected by the fixing member.

[0014] Optionally, the front and back symmetrical first side plates are fixedly installed with a resisting block for pushing the wedge-shaped block on one side wall close to each other, the resisting block extrudes the wedge-shaped block for increasing the contact area of the wedge-shaped block with the corresponding slot, and a connecting pipe port fixedly installed on the first side plate on the front side is connected with the air valve.

[0015] Compared with the prior art, the machining device for forming a helicopter rotor has the following beneficial effects: the machining device for forming a helicopter rotor can improve the density of the casting by synchronously applying pressure in the casting process to reduce defects such as pores or shrinkage, can adjust the gas pressure according to different alloys, and can adapt to the forming requirements of complex structures; the right side reserved cavity serves as a metal liquid buffer area, cooperates with the inert gas pressure adjustment, ensures uniform filling of the metal liquid in the complex cavity, reduces problems such as cold shut or insufficient filling, and reduces metal oxidation and improves the purity of the metal liquid; the sealing mechanism maintains a high-temperature and high-pressure environment, so that the casting and HIP are completed in the same mold cavity, secondary oxidation or cooling defects caused by the traditional step-by-step process are avoided, and the production cycle is shortened, thereby realizing batch production of high-precision complex connecting rods by adopting the design of die casting and HIP integration and inert gas dynamic pressure. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the lower mold core and the upper mold core of the present application.

[0018] Figure 2 It is an exploded three-dimensional structure schematic diagram of the lower mold core and the upper mold core of the present application.

[0019] Figure 3 It is a bottom view structure schematic diagram of the upper mold core of the present application.

[0020] Figure 4 It is a cross-sectional structure schematic diagram of the high-pressure inert gas and the metal liquid entering the cavity of the present application.

[0021] Figure 5 It is a partial cross-sectional three-dimensional structure schematic diagram of the lower mold core and the upper mold core of the present application.

[0022] Figure 6 It is Figure 5 It is an enlarged structure schematic diagram of position A in the middle.

[0023] Figure 7It is a perspective view of the sealing mechanism.

[0024] Figure 8 It is an explosion perspective view of the sealing mechanism and the lower mold core and the upper mold core.

[0025] Figure 9 It is an explosion perspective view of the sealing mechanism.

[0026] Figure 10 It is a structural schematic view of the helicopter rotor assembly.

[0027] Figure 11 It is a structural schematic view of the complex connecting rod of the helicopter rotor assembly.

[0028] In the figure: 1, lower mold core; 11, positioning column; 12, lower bottom plate; 13, upper lower mold module; 2, upper mold core; 21, upper cage; 22, lower upper mold module; 3, gate; 4, flow-through mechanism; 41, cavity; 42, reserved cavity; 43, air valve; 5, locking mechanism; 51, bolt; 511, insertion slot; 52, insertion assembly; 521, sliding slot; 522, wedge block; 6, heating rod; 7, sealing mechanism; 71, lower sealing plate; 711, positioning plate; 712, limiting sliding block; 713, limiting sliding way; 72, first side plate; 721, connecting pipe opening; 73, second side plate; 731, No. 1 insertion rod; 732, No. 1 insertion hole; 74, upper sealing plate; 741, No. 2 insertion rod; 742, No. 2 insertion hole; 75, fixing piece. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 10 and Figure 11 , a processing device for forming a helicopter rotor, comprising a lower mold core 1 and an upper mold core 2 matched therewith, the upper mold core 2 is provided with a gate 3, and the lower mold core 1 and the upper mold core 2 are provided with a flow-through mechanism 4 in common. The flow mechanism 4 comprises a cavity 41 for casting multiple complex connecting rods, which is jointly formed by the lower mold core 1 and the upper mold core 2, and the cavity 41 is provided with left and right distribution of the reserved cavity 42, the upper mold core 2 is fixedly provided with the gas valve 43 corresponding to and communicating with the reserved cavity 42, and the gas valve 43 controls the high-pressure inert gas to enter or discharge the cavity 41; The right reserved cavity 42 is connected with the lower end of the pouring gate 3, the lower mold core 1 and the upper mold core 2 are provided with the heating rod 6, and the lower mold core 1 and the upper mold core 2 are covered with the sealing mechanism 7 for sealing and heat preservation of the lower mold core 1 and the upper mold core 2. The flow mechanism 4 cooperates with the sealing mechanism 7 and is used for high-pressure die casting and hot isostatic pressing of multiple complex connecting rods in the lower mold core 1 and the upper mold core 2.

[0031] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the lower mold core 1 is composed of the lower bottom plate 12 and the upper lower mold block 13, the upper mold core 2 is composed of the upper cage frame 21 and the lower upper mold block 22, and the lower mold block and the upper mold block form the cavity 41 and the reserved cavity 42.

[0032] The lower mold core 1 and the upper mold core 2 are both made of ceramic matrix composite material, the lower mold core 1 is provided with a plurality of positioning columns 11, the upper mold core 2 is provided with a plurality of positioning holes corresponding to the positioning columns 11, and the lower mold core 1 and the upper mold core 2 are connected by the positioning columns 11 and the positioning holes.

[0033] In specific work, the structure designed by the scheme is suitable for die forging of helicopter rotor connecting pieces, and is specifically for manufacturing of complex connecting rods of helicopter rotors, wherein the pouring system comprises a pressing cylinder and a pressing punch (not shown in the figure), and the pouring system is installed on the pouring gate 3, when production is needed, the upper mold core 2 and the lower mold core 1 are guided and connected by the positioning columns 11, then the metal liquid is pressed into the cavity 41 at high speed and high pressure through the pouring system, so as to ensure that the metal liquid can quickly and accurately fill the cavity 41.

[0034] The reserved cavity 42 is an auxiliary cavity of the cavity 41, which is used for accommodating high-pressure inert gas, the gas valve 43 can control the gas pressure, the inert gas is controlled by the external air pump connection, and the heating rod 6 can continuously provide heat source to keep the casting in plastic state.

[0035] When the metal liquid is injected into the cavity 41 through the gate 3, the external air pump injects high-pressure inert gas into the cavity through the air valve 43 connected with the right side reserved cavity 42. At this time, the pressure of the inert gas will work together with the high-pressure injection to fill the metal liquid into the cavity 41 along the predetermined path. In this process, the air valves 43 on both sides can simultaneously control the gas flow in the cavity 41, so as to form a dynamic pressure gradient in the cavity 41 to promote complete filling of the metal liquid, and until the filling of the metal liquid is completed, thereby reducing the problems of cold shut or underfilling.

[0036] It can be understood that in the process of adjusting the gas flow of the air valves 43 on both sides, the opening time, opening degree and duration of the air valves 43 on both sides can be controlled through preset program or sensor feedback. In the specific implementation process, the air valve 43 away from the gate 3 can be opened first to discharge the original gas in the cavity 41, until the original gas is completely discharged, and then the metal liquid is injected. After the metal liquid flows to the middle section, the pressure of the air valves 43 on both sides is adjusted, so as to form a continuous and directional pressure gradient behind the front of the metal liquid flow, push the metal liquid to fill into every corner of the cavity 41, and realize the feeding, effectively promoting the complete filling of the metal liquid.

[0037] In this process, the air valve 43 controls the high-pressure inert gas to enter the cavity 41, and can apply pressure synchronously during the cooling process of the casting to reduce the defects such as pores or shrinkage holes existing in the casting, thereby improving the density of the casting, and the gas pressure can be adjusted according to different alloys to adapt to the complex structure forming requirements of other connecting parts. At the same time, the high-pressure inert gas can also play a role in reducing metal oxidation and improving the purity of the metal liquid.

[0038] Please refer to Figure 1 , Figure 5 and Figure 6 , and also include a locking mechanism 5 arranged on the lower mold core 1 and the upper mold core 2. The locking mechanism 5 includes a plurality of bolts 51 penetrating the upper mold core 2 in an array manner and being threadedly connected with the upper mold core 2. The lower mold core 1 is provided with screw holes corresponding to the bolts 51 in one-to-one manner. The lower mold core 1 is provided with a plug-in assembly 52 for locking the bolts 51.

[0039] Please refer to Figure 6 , the plug-in assembly 52 includes a sliding groove 521 arranged at the screw hole. The outer ring wall of the bolt 51 is penetrated by a plug-in groove 511. The wedge-shaped block 522 is jointly and slidably installed in the sliding groove 521 and the corresponding plug-in groove 511. The reset plate is slidably installed in the sliding groove 521 through the spring arranged therein.

[0040] In specific work, after the lower mold core 1 and the upper mold core 2 are folded, the bolt 51 is used to pass through the upper mold core 2 and is screwed into the threaded hole of the lower mold core 1, the preliminary fixation of the lower mold core 1 and the upper mold core 2 is realized through the threaded connection, then the wedge-shaped block 522 is inserted along the sliding groove 521 and is embedded into the insertion groove 511 at the lower end of the bolt 51, so that the radial constraint is applied to the bolt 51, if the bolt 51 has a back-off trend due to thermal expansion or pressure fluctuation in the process of high-pressure die casting or hot isostatic pressing, the contact surface of the wedge-shaped block 522 and the insertion groove 511 will generate a reverse resistance, preventing the bolt 51 from loosening, so as to form a double fixation mechanism, effectively inhibiting the displacement of the bolt 51 under high dynamic load, and avoiding the leakage of the metal liquid or the abnormal fluctuation of the pressure of the cavity 41.

[0041] Please refer to Figure 7 , Figure 8 and Figure 9 , the sealing mechanism 7 includes a lower sealing plate 71 arranged below the lower mold core 1, the lower sealing plate 71 is provided with a front-rear symmetric first side plate 72 and a left-right symmetric second side plate 73, and an upper sealing plate 74 is arranged above the lower sealing plate 71. The left-right symmetric second side plate 73, the front-rear symmetric first side plate 72, the lower sealing plate 71 and the upper sealing plate 74 are covered outside the lower mold core 1 and the upper mold core 2, the sealing mechanism 7 is assembled to form a closed space by multiple composite plates, and a sealing strip is arranged at the joint of the plates.

[0042] Please refer to Figure 7 , Figure 8 and Figure 9 , a plurality of positioning plates 711 for positioning the lower mold core 1 are fixedly installed on the upper end surface of the lower sealing plate 71, a limiting sliding block 712 is fixedly installed at the lower end of the left-right symmetric second side plate 73 and the front-rear symmetric first side plate 72, and a limiting sliding groove 713 matched with the limiting sliding block 712 is formed on the upper end surface of the lower sealing plate 71.

[0043] Please refer to Figure 7 , Figure 8 and Figure 9 , a plurality of left-right symmetric first insertion rods 731 are fixedly installed on the opposite surfaces of the left-right symmetric second side plate 73, a first insertion hole 732 matched with the insertion rod is formed on the upper end surface of the left-right symmetric second side plate 73 and the front-rear symmetric first side plate 72, and a second insertion hole 742 is formed on the upper end surface of the left-right symmetric second side plate 73 and the front-rear symmetric first side plate 72, and a second insertion rod 741 matched with the second insertion hole 742 is fixedly installed on the lower end surface of the upper sealing plate 74.

[0044] Please refer to Figure 7 , Figure 8 and Figure 9The first side plate 72, the second side plate 73, the lower sealing plate 71 and the upper sealing plate 74 are provided with heat insulation layers at the ends close to each other. The upper sealing plate 74 is fixedly connected with the second side plate 73 through the fixing member 75.

[0045] Please refer to Figure 7 , Figure 8 and Figure 9 The first side plate 72 is fixedly installed with a block for pushing the wedge-shaped block 522 on the opposite surface. The block extrudes the wedge-shaped block 522 to increase the contact area of the wedge-shaped block 522 with the corresponding slot 511. The first side plate 72 on the front side is fixedly installed with a connecting pipe 721 connected with the air valve 43.

[0046] In the specific work, when the casting has not completely cooled, the mold composed of the lower mold core 1 and the upper mold core 2 is placed on the lower sealing plate 71. At this time, the first side plate 72 on the lower sealing plate 71 is moved first. The limiting sliding block 712 on the first side plate 72 is embedded in the limiting sliding groove 713, forcing the first side plate 72 to slide along the preset path until it completely fits the edge of the lower sealing plate 71. During this process, the positioning plate 711 limits the lower mold core 1 to prevent the mold from deviating due to external vibration or thermal expansion. The interference fit of the limiting sliding block 712 and the limiting sliding groove 713 ensures the perpendicularity of the first side plate 72 and the lower sealing plate 71.

[0047] Then the second side plate 73 on both sides is moved to the lower sealing plate 71. Similarly, the corresponding limiting sliding block 712 is embedded in the limiting sliding groove 713, and the first side plate 72 on the first side plate 72 is inserted into the first side plate 72. The gap fit between the plug rod and the hole realizes the positioning between the side plates. At this time, the second side plate 73, the first side plate 72, the lower sealing plate 71 and the upper sealing plate 74 form a surrounding.

[0048] Then the gate 3 is sealed, and the second side plate 73, the first side plate 72, the lower sealing plate 71 and the upper sealing plate 74 are fixed. The second plug rod 741 of the upper sealing plate 74 is inserted into the second hole 742. At this time, the upper sealing plate 74 is fixed to the second side plate 73, the first side plate 72, the lower sealing plate 71 and the upper sealing plate 74, so that the sealing mechanism 7 realizes fast positioning without screw connection in the horizontal and vertical directions. The fixing member 75 fixes the upper sealing plate 74 and the second side plate 73 again. The gap between the plug rod and the hole allows slight deformation due to thermal expansion under high temperature conditions, avoiding sealing failure caused by structural stress concentration.

[0049] At this time, the heat insulation layer inside the second side plate 73, the first side plate 72, the lower sealing plate 71 and the upper sealing plate 74 forms a closed heat insulation barrier around the lower mold core 1 and the upper mold core 2, at this time, the temperature of the closed space can be raised by using the heating rod 6, and at the same time, the isostatic gas pressure can be uniformly applied to the cavity 41 through the gas valve 43 by the external air pump and the connecting port 721, so as to eliminate the internal pores of the casting and improve the material density, and at the same time, the adhesion between the casting and the lower mold core 1 or the upper mold core 2 is separated, so as to perform the HIP treatment on the casting.

[0050] In this process, the connecting port 721 is connected with the port of the gas valve 43, the gas pipeline connection is completed synchronously when the sealing mechanism 7 is closed, the sealing of the inert gas conveying channel is ensured, and when the side plates and the upper and lower sealing plates of the sealing mechanism 7 are assembled, the abutting block inside the first side plate 72 extrudes the wedge-shaped block 522, so as to force the wedge-shaped block 522 to move to the inside of the insertion slot 511 against the spring resistance, at this time, the contact surface between the inclined surface of the wedge-shaped block 522 and the insertion slot 511 is significantly increased, so as to improve the stability between the upper mold core 2 and the lower mold core 1 during the HIP.

[0051] In this way, the casting and the HIP are completed in the same mold cavity under the high temperature and high pressure environment maintained by the sealing mechanism 7, the secondary oxidation or cooling defects caused by the traditional step-by-step process are avoided, and the production cycle is shortened, so as to realize the batch production of high-precision complex connecting rods by using the design of the die casting and the HIP integration and the inert gas dynamic pressurization.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A processing apparatus for forming helicopter rotors, comprising a lower mold core (1) and an upper mold core (2) therewith, wherein the upper mold core (2) is provided with a gate (3), characterized in that: The lower mold core (1) and the upper mold core (2) are both provided with a flow mechanism (4); The circulation mechanism (4) includes a cavity (41) composed of a lower mold core (1) and an upper mold core (2) for casting multiple complex connecting rods. The cavity (41) is provided with reserved cavities (42) distributed on the left and right. An air valve (43) corresponding to and connected to the reserved cavity (42) is fixedly installed on the upper mold core (2). The air valve (43) controls the high-pressure inert airflow to enter or exit the cavity (41). The right-side reserved cavity (42) is connected to the lower end of the gate (3). Heating rods (6) are provided inside the lower mold core (1) and the upper mold core (2). The lower mold core (1) and the upper mold core (2) are covered with a sealing mechanism (7) for sealing and heat preservation of the lower mold core (1) and the upper mold core (2). The flow mechanism (4) cooperates with the sealing mechanism (7) and is used to perform high-pressure die casting and hot isostatic pressing on multiple complex connecting rods in the lower mold core (1) and upper mold core (2).

2. The processing apparatus for helicopter rotor forming as described in claim 1, characterized in that: The lower mold core (1) is composed of a lower base plate (12) and an upper lower module (13), and the upper mold core (2) is composed of an upper cage frame (21) and a lower upper module (22). The lower module and the upper module form a cavity (41) and a reserved cavity (42).

3. The processing apparatus for helicopter rotor forming as described in claim 2, characterized in that: Both the lower mold core (1) and the upper mold core (2) are made of ceramic matrix composite material. The lower mold core (1) is provided with a number of positioning posts (11), and the upper mold core (2) is provided with positioning holes that correspond one-to-one with the positioning posts (11). The lower mold core (1) and the upper mold core (2) are joined together by the positioning posts (11) and the positioning holes.

4. The processing apparatus for helicopter rotor forming as described in claim 1, characterized in that: It also includes a locking mechanism (5) provided on the lower mold core (1) and the upper mold core (2). The locking mechanism (5) includes a plurality of bolts (51) that pass through the upper mold core (2) in an array and are threadedly connected to the upper mold core (2). The lower mold core (1) has screw holes that correspond one-to-one with the bolts (51). The lower mold core (1) is provided with a plug-in assembly (52) for locking the bolts (51).

5. The processing apparatus for helicopter rotor forming as described in claim 4, characterized in that: The plug-in assembly (52) includes a groove (521) opened at the screw hole, and a slot (511) is opened through the lower end of the outer ring wall of the bolt (51). A wedge block (522) is slidably installed in the groove (521) and the corresponding slot (511). A reset plate is slidably installed in the groove (521) by means of a spring.

6. The processing apparatus for helicopter rotor forming as described in claim 1, characterized in that: The sealing mechanism (7) includes a lower sealing plate (71) disposed below the lower mold core (1). The lower sealing plate (71) is provided with a front-to-back symmetrical first side plate (72) and a left-to-right symmetrical second side plate (73). An upper sealing plate (74) is disposed directly above the lower sealing plate (71). The left-to-right symmetrical second side plate (73), the front-to-back symmetrical first side plate (72), the lower sealing plate (71) and the upper sealing plate (74) cover the outside of the lower mold core (1) and the upper mold core (2).

7. The processing apparatus for helicopter rotor forming as described in claim 6, characterized in that: The upper end face of the lower sealing plate (71) is fixedly installed with several positioning plates (711) for positioning the lower mold core (1). The lower ends of the left and right symmetrical second side plate (73) and the front and rear symmetrical first side plate (72) are fixedly installed with limit sliders (712). The upper end face of the lower sealing plate (71) is provided with limit slides (713) that cooperate with the limit sliders (712).

8. The processing apparatus for helicopter rotor forming as described in claim 6, characterized in that: The two symmetrical second side plates (73) are fixedly installed with several first-order insert rods (731) on opposite sides. The first side plates (72) are symmetrical front and back and are provided with first-order insert holes (732) that cooperate with the insert rods. The upper ends of the two symmetrical second side plates (73) and the first side plates (72) are provided with second-order insert holes (742). The lower end face of the upper sealing plate (74) is fixedly installed with second-order insert rods (741) that correspond one-to-one with the second-order insert holes (742).

9. The processing apparatus for helicopter rotor forming as described in claim 6, characterized in that: The left and right symmetrical second side plate (73), the front and back symmetrical first side plate (72), the lower sealing plate (71) and the upper sealing plate (74) are all provided with a heat insulation layer at the ends of their proximity to each other, and the upper sealing plate (74) and the left and right symmetrical second side plate (73) are fixedly connected by a fastener (75).

10. The processing apparatus for helicopter rotor forming as described in claim 6, characterized in that: The first side plate (72) with front and rear symmetry is fixedly installed with a pusher for pushing the wedge block (522). The pusher presses the wedge block (522) to increase the contact area between the wedge block (522) and the corresponding slot (511). A connecting pipe (721) for inserting into the air valve (43) is fixedly installed on the first side plate (72) located on the front side.

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