A processing device for forming a helicopter rotor

Abstract

The application relates to a rotor forming technical field, in particular to a processing device for helicopter rotor forming, which comprises a lower mold core and a matched upper mold core, a gate is arranged on the upper mold core, and a flow circulation mechanism is arranged on the lower mold core and the upper mold core. The processing device for helicopter rotor forming is characterized in that high-pressure inert gas is controlled to enter a forming cavity through a gas valve, pressure is synchronously applied in a casting process, and the compactness of a casting is improved; a right-side reserved cavity serves as a metal liquid buffer area, cooperates with inert gas pressure adjustment, ensures that metal liquid uniformly fills a complex cavity, and reduces problems such as cold separation or insufficient filling; a sealing mechanism maintains a high-temperature and high-pressure environment, so that casting and HIP are completed in the same mold cavity, secondary oxidation or cooling defects caused by traditional step-by-step processes are avoided, and a production cycle is shortened. Therefore, the design of the integrated pressure die casting and HIP and inert gas dynamic pressure realizes batch production of high-precision complex connecting rods.

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. The conventional die casting or hot isostatic pressing (HIP) process cannot control the pressure distribution in the cavity in real time 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 reduces 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:

[0006] A processing device for helicopter rotor forming, comprising a lower mold core and a 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 into or out of the cavity;

[0007] The right side reserved cavity is communicated with the lower end of the gate, the heating rod is arranged in the lower mold core and the upper mold core, and the sealing mechanism is arranged outside the lower mold core and the upper mold core and is used for sealing and heat preservation of the lower mold core and the upper mold core.

[0008] The flow mechanism cooperates with the sealing mechanism and is used for high-pressure die casting and hot isostatic pressing of the plurality of complex connecting rods in the lower mold core and the upper mold core.

[0009] 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 the cavity and the reserved cavity.

[0010] Optionally, the lower mold core and the upper mold core are 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.

[0011] Optionally, the locking mechanism further comprises a plurality of bolts penetrating the upper mold core in an array mode 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.

[0012] 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 jointly and slidably arranged in the sliding groove and the corresponding insertion slot, and a reset plate slidably arranged in the sliding groove by the spring.

[0013] 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, an upper sealing plate arranged above the lower sealing plate, and the left-right symmetric second side plate, the front-rear symmetric first side plate, the lower sealing plate and the upper sealing plate being arranged outside the lower mold core and the upper mold core.

[0014] 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 limit 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 limit sliding grooves corresponding to the limit sliding blocks are arranged on the upper end surface of the lower sealing plate.

[0015] 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, 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, and 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.

[0016] Optionally, the left-right symmetrical second side plates, the front-rear symmetrical first side plates, the lower sealing plates and the upper sealing plates are provided with heat preservation layers at the ends close to each other, and the upper sealing plates and the left-right symmetrical second side plates are fixedly connected through the fixed members.

[0017] Optionally, the front-rear symmetrical first side plates are fixedly installed with resisting blocks for pushing the wedge-shaped blocks on the side walls close to each other, the resisting blocks extruding the wedge-shaped blocks are used for increasing the contact area of the wedge-shaped blocks and the corresponding insertion slots, and the first side plates on the front side are fixedly installed with the connecting pipe mouths connected with the gas valves.

[0018] 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 controlling the high-pressure inert gas to enter the cavity through the gas valve and synchronously applying pressure in the casting process to reduce defects such as air holes or shrinkage, can adjust the gas pressure according to different alloys to adapt to the forming requirements of complex structures, can ensure that the metal liquid uniformly fills the complex cavity by using the right side cavity as a metal liquid buffer area and cooperating with the inert gas pressure adjustment to reduce problems such as cold shut or insufficient filling, and can also reduce metal oxidation and improve the purity of the metal liquid by using the high-pressure inert gas, can maintain a high-temperature and high-pressure environment by using the sealing mechanism to complete the casting and HIP in the same mold cavity, can avoid secondary oxidation or cooling defects caused by the traditional step-by-step process, and can shorten the production cycle, and the design of the die casting and HIP integration and inert gas dynamic pressure can realize batch production of high-precision complex connecting rods. BRIEF DESCRIPTION OF DRAWINGS

[0019] 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 also be obtained by those skilled in the art without any creative labor.

[0020] 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.

[0021] Figure 2 It is an exploded schematic diagram of the three-dimensional structure of the lower mold core and the upper mold core of the present application.

[0022] Figure 3 It is a schematic diagram of the bottom view structure of the upper mold core of the present application.

[0023] Figure 4 It is a schematic diagram of the sectional structure of the high-pressure inert gas and the metal liquid entering the cavity of the present application.

[0024] Figure 5 It is a schematic diagram of the partial sectional three-dimensional structure of the lower mold core and the upper mold core of the present application.

[0025] Figure 6 For Figure 5 Enlarged structural schematic view at A in the figure.

[0026] Figure 7 For the three-dimensional structural schematic view of the sealing mechanism of the application.

[0027] Figure 8 For the exploded three-dimensional structural schematic view of the sealing mechanism and the lower mold core and the upper mold core.

[0028] Figure 9 For the exploded three-dimensional structural schematic view of the sealing mechanism.

[0029] Figure 10 For the structural schematic view of the helicopter rotor assembly.

[0030] Figure 11 For the structural schematic view of the complex connecting rod of the helicopter rotor assembly.

[0031] 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

[0032] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0033] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 10 and Figure 11A kind of processing device for helicopter rotor forming, including lower mould core 1 and the upper mould core 2 matched with it, upper mould core 2 is provided with gate 3, lower mould core 1 and upper mould core 2 are provided with flow mechanism 4 on it;

[0034] Flow mechanism 4 includes the cavity 41 for casting multiple complex connecting rods by lower mould core 1 and upper mould core 2 jointly, the left and right distribution of preformed cavity 42 is provided in cavity 41, the air valve 43 corresponding with preformed cavity 42 and being connected is fixedly installed on upper mould core 2, air valve 43 controls high-pressure inert gas to enter or discharge cavity 41;

[0035] Right preformed cavity 42 is connected with the lower end of gate 3, heating rod 6 is provided in lower mould core 1 and upper mould core 2, lower mould core 1 and upper mould core 2 are covered with sealing mechanism 7 for carrying out sealing heat preservation to lower mould core 1 and upper mould core 2;

[0036] Flow mechanism 4 cooperates with sealing mechanism 7 and is used for carrying out high-pressure die casting and hot isostatic pressing to multiple complex connecting rods in lower mould core 1 and upper mould core 2.

[0037] Please refer to Figure 1 、 Figure 2 、 Figure 3 And Figure 4 , lower mould core 1 is composed of lower bottom plate 12 and upper lower mould block 13, upper mould core 2 is composed of upper cage frame 21 and lower upper mould block 22, lower mould block and upper mould block form cavity 41 and preformed cavity 42.

[0038] Lower mould core 1 and upper mould core 2 are made of ceramic matrix composite material, a plurality of positioning columns 11 are provided on lower mould core 1, positioning holes corresponding to positioning columns 11 are formed on upper mould core 2, and lower mould core 1 and upper mould core 2 are connected by inserting positioning columns 11 into positioning holes.

[0039] Specifically, the structure designed in the scheme is suitable for die forging of helicopter rotor connecting pieces, specifically for manufacturing complex connecting rods of helicopter rotors, wherein the pouring system includes a pressing cylinder and a pressing punch (not shown in the figure), and the pouring system is installed on the gate 3, when production is needed, the upper mould core 2 and the lower mould core 1 are guided and connected by the positioning column 11, then the metal liquid is pressed into the cavity 41 at high speed and high pressure through the pouring system, to ensure that the metal liquid can quickly and accurately fill the cavity 41.

[0040] The preformed cavity 42 is an auxiliary cavity of the cavity 41, used for accommodating high-pressure inert gas, and the air valve 43 can control the gas pressure, and the inert gas is controlled by connecting an external air pump, and the heating rod 6 can continuously provide heat source to keep the casting in plastic state.

[0041] 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 the 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.

[0042] It can be understood that in the process of adjusting the gas flow of the air valves 43 on both sides, the opening time sequence, 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, at this time, 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 promote the complete filling of the metal liquid.

[0043] 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, so as 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, and the high-pressure inert gas can also reduce the oxidation of the metal and improve the purity of the metal liquid.

[0044] 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, and the lower mold core 1 is provided with a plug-in assembly 52 for locking the bolts 51.

[0045] Please refer to Figure 6 , the plug-in assembly 52 includes a sliding groove 521 arranged at the screw hole, an insertion groove 511 penetrating the lower end of the outer ring wall of the bolt 51, a wedge-shaped block 522 is jointly and slidably installed in the corresponding insertion groove 511 and the sliding groove 521, and a reset plate is slidably installed in the sliding groove 521 through the spring arranged therein.

[0046] 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.

[0047] Please refer to Figure 7 , Figure 8 and Figure 9 , the sealing mechanism 7 comprises 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.

[0048] 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 in the upper end surface of the lower sealing plate 71.

[0049] 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 in 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 in 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.

[0050] 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.

[0051] 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.

[0052] 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 downward. 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 between 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.

[0053] Then the second side plate 73 on both sides is moved to the lower sealing plate 71. 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.

[0054] Next, the gate 3 is sealed, and the second side plate 73 on the upper sealing plate 74 is inserted into the second side plate 73. 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.

[0055] 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.

[0056] 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.

[0057] 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 die casting and HIP integration and inert gas dynamic pressurization.

[0058] 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 device for forming a rotor of a helicopter, comprising a lower core (1) and a cooperating upper core (2), the upper core (2) being provided with a gate (3), characterized in that: The lower mold core (1) and the upper mold core (2) are provided with a flow mechanism (4) in common; The flow mechanism (4) comprises a cavity (41) for casting multiple complex connecting rods, which is composed of the lower mold core (1) and the upper mold core (2) in common, and the cavity (41) is provided with left and right distribution of reserved cavities (42), the upper mold core (2) is fixedly provided with air valves (43) corresponding to and communicating with the reserved cavities (42), and the air valves (43) control the high-pressure inert gas flow to enter or exit the cavity (41); The right reserved cavity (42) is connected with the lower end of the gate (3), the lower mold core (1) and the upper mold core (2) are provided with heating rods (6), and 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 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). 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) 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), and the lower mold core (1) is provided with a plug-in assembly (52) for locking the bolts (51); The plug-in assembly (52) comprises a sliding groove (521) provided at the screw hole, a plug-in groove (511) penetrating the lower end of the outer ring wall of the bolt (51), a wedge block (522) slidingly installed in the sliding groove (521) and the corresponding plug-in groove (511) in common, and a reset plate slidingly installed in the sliding groove (521) through the spring. The sealing mechanism (7) comprises a lower sealing plate (71) arranged below the lower mold core (1), the lower sealing plate (71) is provided with front and rear symmetrical first side plates (72) and left and right symmetrical second side plates (73), an upper sealing plate (74) is arranged above the lower sealing plate (71), and the left and right symmetrical second side plates (73), the front and rear symmetrical first side plates (72), the lower sealing plate (71) and the upper sealing plate (74) are arranged outside the lower mold core (1) and the upper mold core (2); The opposite surface of the front and rear symmetrical first side plates (72) is fixedly provided with a resisting block for pushing and extruding the wedge block (522), the resisting block extrudes the wedge block (522) to increase the contact area of the wedge block (522) and the corresponding plug-in groove (511), and the first side plate (72) on the front side is fixedly provided with a connecting pipe (721) plugged with the air valve (43).

2. The processing apparatus for forming a rotor of a helicopter according to Claim 1, wherein: The lower mold core (1) is composed of a lower bottom plate (12) and an upper lower module (13), the upper mold core (2) is composed of an upper cage frame (21) and a lower upper module (22), and the lower module and the upper module form the cavity (41) and the reserved cavity (42).

3. The processing apparatus for molding a rotor of a helicopter according to Claim 2, wherein: The lower mold core (1) and the upper mold core (2) are both made of ceramic matrix composite material, a plurality of positioning columns (11) are arranged on the lower mold core (1), a plurality of positioning holes corresponding to the positioning columns (11) are arranged on the upper mold core (2), and the lower mold core (1) and the upper mold core (2) are connected by inserting the positioning columns (11) into the positioning holes.

4. The processing apparatus for molding a rotor of a helicopter according to Claim 1, wherein: 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), limit sliding blocks (712) are fixedly installed on the lower ends of the left-right symmetrical second side plates (73) and the front-rear symmetrical first side plates (72), and limit sliding channels (713) matched with the limit sliding blocks (712) are arranged on the upper end surface of the lower sealing plate (71).

5. The processing apparatus for molding a rotor of a helicopter according to Claim 1, wherein: A plurality of first inserting rods (731) are fixedly installed on the opposite surfaces of the left-right symmetrical second side plates (73), a plurality of first inserting holes (732) matched with the first inserting rods are arranged on the second side plates (73), and second inserting holes (742) are arranged on the upper ends of the left-right symmetrical second side plates (73) and the front-rear symmetrical first side plates (72).

6. The processing apparatus for molding a rotor of a helicopter according to Claim 1, wherein: The left-right symmetrical second side plates (73), the front-rear symmetrical first side plates (72), the lower sealing plate (71) and the upper sealing plate (74) are provided with heat preservation layers at one end close to each other, and the upper sealing plate (74) and the left-right symmetrical second side plates (73) are fixedly connected through the arranged fixing pieces (75).

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