Combined tool for forming main bearing frame

Abstract

The utility model discloses a combined tool for forming a main force-bearing frame, which comprises a front half frame die for forming a front half frame of the main force-bearing frame and a rear half frame die for forming a rear half frame of the main force-bearing frame, a plurality of gap control assemblies are arranged between the front half frame mold and the rear half frame mold, the gap control assemblies control gaps between the front half frame mold and the rear half frame mold, a male mold tool is adopted, the rationality of manufacturing of a forming process and a process separation surface of the bearing frame is guaranteed in a combined mode, and the problem of out-of-tolerance assembly is reduced.

Description

Technical Field

[0001] The utility model relates to the field of general aviation bulkhead molding tooling, in particular to a combined tooling for molding a main load-bearing frame. Background Art

[0002] Bulkheads are generally used as the main force transmission and load-bearing structures of aircraft, pods, missile bodies and other product structures, and are usually composed of structures such as flanges, webs, and stiffeners. Traditional bulkheads are mostly metal structures such as steel, aluminum alloy, and magnesium alloy. Affected by the process and the properties of the materials themselves, metal bulkheads have problems such as heavy weight, low load-bearing efficiency, and corrosion resistance. On the basis of ensuring safety, civil aviation has always been an important consideration in aircraft design for fuel economy. The key technology lies in reducing the weight of aircraft structures. Composite materials have the advantages of high specific strength and specific modulus, and long fatigue life, and have gradually replaced traditional metal materials to become the main material of the new generation of aircraft. The application parts of composite materials on aircraft have gradually developed from non-load-bearing parts and secondary load-bearing parts to main load-bearing parts, and are developing in the direction of large-scale, complex, and integrated. The amount of advanced composite materials used has become an important indicator of the advancement of aircraft.

[0003] At present, the main load-bearing frame of medium-sized transport aircraft is often formed by segmented or integral metal milling for the convenience of production process, while the ordinary secondary load-bearing composite material cadmium frame is often formed by simple hot diaphragm female mold tooling. In particular, the molding quality of the process separation surface is difficult to ensure the assembly tolerance, so this application proposes a solution to the problem of production and assembly tolerance. Summary of the invention

[0004] Purpose of the utility model: The purpose of the utility model is to provide a combined tooling for forming a main load-bearing frame, by using the combined tooling to complete the forming of the main load-bearing frame, reducing the problem of assembly tolerance.

[0005] Technical solution: The utility model describes a combined tooling for forming a main load-bearing frame, comprising a front half-frame mold for forming the front half-frame of the main load-bearing frame and a rear half-frame mold for forming the rear half-frame of the main load-bearing frame. The front half-frame mold and the rear half-frame mold are symmetrical structures, and a plurality of gap control components are arranged between the front half-frame mold and the rear half-frame mold. The gap control components control the gap between the front half-frame mold and the rear half-frame mold.

[0006] Preferably, the front half frame mold comprises a front frame mold base, a multi-petal front cover plate, a multi-petal front base cover plate, a multi-petal front support frame side plate, a multi-petal front support frame pressure plate, a multi-petal front first outer carbon yarn side plate, a multi-petal front second outer carbon yarn side plate and a multi-petal front inner carbon yarn pressure plate;

[0007] The front frame mold base is provided with a first step, a second step and a third step for forming the front half frame of the main load-bearing frame;

[0008] After the multi - petal front cover plate is arranged on the first step of the front frame mold base, the edge of the multi - petal front cover plate extends out of the top end surface of the first step;

[0009] The multi - petal front base cover plate is fitted on the third step of the front frame mold base and the height of the multi - petal front base cover plate does not exceed the height of the second step;

[0010] The multi - petal front support skeleton side plate is arranged on the multi - petal front base cover plate, and the height after the multi - petal front support skeleton side plate is arranged on the multi - petal front base cover plate is higher than the second step;

[0011] The multi - petal front support skeleton pressing plate is arranged on the second step of the front frame mold base. A cavity one for forming the front half - frame of the main load - bearing frame is formed between the multi - petal front support skeleton pressing plate and the second step. After the end surface of the multi - petal front support skeleton pressing plate facing the first step side contacts the side of the multi - petal front cover plate extending out of the top end surface of the first step, a cavity two for forming the front half - frame of the main load - bearing frame is formed between the end surface of one side of the multi - petal front support skeleton pressing plate and the end surface of the side of the first step, and the end surface of the other side extends out of the second step;

[0012] The multi - petal front first outer carbon fiber side plate is arranged on the multi - petal front base cover plate after removing the multi - petal front support skeleton side plate. A cavity three for forming the front half - frame of the main load - bearing frame is formed between the end surface of the multi - petal front first outer carbon fiber side plate facing the second step side and the end surfaces of the multi - petal front support skeleton pressing plate, the multi - petal front base cover plate and the second step;

[0013] The multi - petal front second outer carbon fiber side plate is arranged on the third step of the front frame mold base after removing the multi - petal front base cover plate, the multi - petal front support skeleton side plate and the multi - petal front first outer carbon fiber side plate, and the multi - petal front second outer carbon fiber side plate limits the thickness of the cavity three;

[0014] The multi - petal front internal carbon fiber pressing plate is arranged on the multi - petal front base cover plate and the second step, and the multi - petal front internal carbon fiber pressing plate limits the thickness of the cavity two.

[0015] Preferably, the cavity one, the cavity two and the cavity three are communicated to form the front half - frame of the main load - bearing frame.

[0016] Preferably, the rear half - frame mold includes a rear frame mold base, a multi - petal rear cover plate, a multi - petal rear base cover plate, a multi - petal rear support skeleton side plate, a multi - petal rear support skeleton pressing plate, a multi - petal rear first outer carbon fiber side plate, a multi - petal rear second outer carbon fiber side plate and a multi - petal rear internal carbon fiber pressing plate;

[0017] The rear frame mold base is provided with a fourth step, a fifth step and a sixth step for forming the rear half - frame of the main load - bearing frame;

[0018] After the multi - petal rear cover plate is arranged on the fourth step of the rear frame die base, the edge of the multi - petal rear cover plate extends out of the top end face of the fourth step;

[0019] The multi - petal rear base cover plate is fitted on the sixth step of the rear frame die base and the height of the multi - petal rear base cover plate does not exceed the height of the fifth step;

[0020] The multi - petal rear support frame side plate is arranged on the multi - petal rear base cover plate. After the multi - petal rear support frame side plate is arranged on the multi - petal rear base cover plate, its height is higher than that of the fourth step;

[0021] The multi - petal rear support frame pressing plate is arranged on the fourth step of the rear frame die base. A cavity four for forming the rear half - frame of the main load - bearing frame is formed between the multi - petal rear support frame pressing plate and the fourth step. After the end face of the multi - petal rear support frame pressing plate facing the fourth step contacts the side of the multi - petal rear cover plate extending out of the top end face of the fourth step, a cavity five for forming the rear half - frame of the main load - bearing frame is formed between the end face of one side of the multi - petal rear support frame pressing plate and the end face of the side of the fourth step, and the end face of the other side extends out of the fourth step;

[0022] The multi - petal rear first outer carbon fiber side plate is arranged on the multi - petal rear base cover plate after the multi - petal rear support frame side plate is removed. A cavity six for forming the rear half - frame of the main load - bearing frame is formed between the end face of the multi - petal rear first outer carbon fiber side plate facing the fifth step and the end faces of the multi - petal rear support frame pressing plate, the multi - petal rear base cover plate and the fifth step;

[0023] The multi - petal rear second outer carbon fiber side plate is arranged on the sixth step of the rear frame die base after the multi - petal rear base cover plate, the multi - petal rear support frame side plate and the multi - petal rear first outer carbon fiber side plate are removed. The multi - petal rear second outer carbon fiber side plate limits the thickness of the cavity six;

[0024] The multi - petal front inner carbon fiber pressing plate is arranged on the multi - petal front base cover plate and the second step, and the multi - petal front inner carbon fiber pressing plate limits the thickness of the cavity five.

[0025] Preferably, the cavity four, the cavity five and the cavity six are communicated to form the rear half - frame of the main load - bearing frame.

[0026] Preferably, a plurality of the gap control components are evenly distributed on the front frame die base and are buckled on the front half - frame of the main load - bearing frame to be formed on the third step and the second step of the front frame die base, so as to adjust the gap when the front half - frame die and the rear half - frame die are assembled together.

[0027] Preferably, the front half - frame die and the rear half - frame die are connected by bolts and nuts in cooperation.

[0028] Beneficial effects: Compared with the prior art, the present utility model has the following advantages:

[0029] (1) The present utility model adopts a male mold tooling, and uses a combined form to ensure the forming process of the load-bearing frame and the rationality of the manufacturing of the process separation surface, reducing the problem of assembly out-of-tolerance.

[0030] (2) The tooling mold in the present utility model can be machined in blocks, solving the problems of difficult and time-consuming movement of large-size tooling and parts, and greatly facilitating the operation of the staff.

[0031] (3) The tooling mold in the present utility model adopts a split structure, and the complete interchangeability of the mold structural parts can be achieved through machining, greatly reducing the use cost of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the explosion view of the present utility model.

[0033] Figure 2 is the sectional view of the first step during the use of the present utility model.

[0034] Figure 3 is the sectional view of the second step during the use of the present utility model.

[0035] Figure 4 is the sectional view of the third step during the use of the present utility model.

[0036] Figure 5 is the sectional view of the fourth step during the use of the present utility model.

[0037] Figure 6 is the sectional view of the fifth step during the use of the present utility model.

[0038] Figure 7 is the sectional view of the sixth step during the use of the present utility model.

[0039] Figure 8 is the sectional view of the seventh step during the use of the present utility model.

[0040] Figure 9 is the sectional view of the ninth step during the use of the present utility model.

[0041] Wherein: 100, front half-frame mold; 200, rear half-frame mold; 300, gap control component; 400, cavity one; 500, cavity two; 600, cavity three; 101, front frame mold base; 102, multi-piece front cover plate; 103, multi-piece front base cover plate; 104, multi-piece front support skeleton side plate; 105, multi-piece front support skeleton pressing plate; 106, multi-piece front first outer carbon fiber side plate; 107, multi-piece front second outer carbon fiber side plate; 108, multi-piece front inner carbon fiber pressing plate; 1011, first step; 1012, second step; 1013, third step; 201, rear frame mold base; 202, multi-piece rear cover plate; 203, multi-piece rear base cover plate; 204, multi-piece rear support skeleton side plate; 205, multi-piece rear support skeleton pressing plate; 206, multi-piece rear first outer carbon fiber side plate; 207, multi-piece rear second outer carbon fiber side plate; 208, multi-piece rear inner carbon fiber pressing plate. Detailed implementation manner

[0042] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0043] Refer to the attached Figure 1 , an exploded view of a combined tooling for forming a main load-bearing frame shown in the present utility model, includes a front half-frame mold 100 for forming the front half-frame of the main load-bearing frame and a rear half-frame mold 200 for forming the rear half-frame of the main load-bearing frame. Among them, the front half-frame mold 100 and the rear half-frame mold 200 are symmetrical structures. A plurality of gap control components 300 are arranged between the front half-frame mold 100 and the rear half-frame mold 200, and the gap control components 300 control the gap between the front half-frame mold 100 and the rear half-frame mold 200.

[0044] In this embodiment, the front half-frame mold 100 includes a front frame mold base 101, a multi-piece front cover plate 102, a multi-piece front base cover plate 103, a multi-piece front support skeleton side plate 104, a multi-piece front support skeleton pressing plate 105, a multi-piece front first outer carbon fiber side plate 106, a multi-piece front second outer carbon fiber side plate 107, and a multi-piece front inner carbon fiber pressing plate 108.

[0045] Wherein, a first step 1011, a second step 1012, and a third step 1013 for forming the front half-frame of the main load-bearing frame are arranged on the front frame mold base 101.

[0046] After the multi-piece front cover plate 102 is arranged on the first step 1011 on the front frame mold base 101, the edge of the multi-piece front cover plate 101 extends out of the top end surface of the first step 1011.

[0047] The multi-piece front base cover plate 103 is attached to the third step 1013 on the front frame mold base 101, and the height of the multi-piece front base cover plate 103 does not exceed the height of the second step 1012.

[0048] The multi - lobe front support frame side plate 104 is arranged on the multi - lobe front base cover plate 103, and the height after the multi - lobe front support frame side plate 104 is arranged on the multi - lobe front base cover plate 103 is higher than the second step 1012.

[0049] The multi - lobe front support frame pressing plate 105 is arranged on the second step 1012 of the front frame mold base 101. A cavity one 400 for forming the front half - frame of the main load - bearing frame is formed between the multi - lobe front support frame pressing plate 105 and the second step 1012. After the end face of the multi - lobe front support frame pressing plate 105 facing the first step 1011 side contacts with one side of the end face of the multi - lobe front cover plate 102 extending from the top end face of the first step 1011, a cavity two 500 for forming the front half - frame of the main load - bearing frame is formed between the end face of one side of the multi - lobe front support frame pressing plate 105 and the end face of the side of the first step 1011. The end face of the other side extends out of the second step 1012.

[0050] The multi - lobe front first outer carbon fiber side plate 106 is arranged on the multi - lobe front base cover plate 103 after removing the multi - lobe front support frame side plate 104. A cavity three 600 for forming the front half - frame of the main load - bearing frame is formed between the end face of the multi - lobe front first outer carbon fiber side plate 106 facing the second step 1012 side and the lateral end faces of the multi - lobe front support frame pressing plate 105, the multi - lobe front base cover plate 103 and the second step 1012.

[0051] The multi - lobe front second outer carbon fiber side plate 107 is arranged on the third step 1013 of the front frame mold base 101 after removing the multi - lobe front base cover plate 103, the multi - lobe front support frame side plate 104 and the multi - lobe front first outer carbon fiber side plate 106. The multi - lobe front second outer carbon fiber side plate 107 limits the thickness of the cavity three 600.

[0052] The multi - lobe front internal carbon fiber pressing plate 108 is arranged on the multi - lobe front cover plate 102 and the second step 1012. The multi - lobe front internal carbon fiber pressing plate 108 limits the thickness of the cavity two 500.

[0053] In this embodiment, the cavity one 400, the cavity two 500 and the cavity three 600 are communicated to form the front half - frame of the main load - bearing frame.

[0054] In this embodiment, the rear half - frame mold 200 includes a rear frame mold base 201, a multi - lobe rear cover plate 202, a multi - lobe rear base cover plate 203, a multi - lobe rear support frame side plate 204, a multi - lobe rear support frame pressing plate 205, a multi - lobe rear first outer carbon fiber side plate 206, a multi - lobe rear second outer carbon fiber side plate 207 and a multi - lobe rear internal carbon fiber pressing plate 208.

[0055] Among them, the rear frame mold base 201 is provided with a fourth step, a fifth step and a sixth step for forming the rear half - frame of the main load - bearing frame.

[0056] After the multi - petal rear cover plate 202 is set on the fourth step of the rear frame mold base 201, the edge of the multi - petal rear cover plate 202 extends beyond the top end face of the fourth step.

[0057] The multi - petal rear base cover plate 203 is fitted on the sixth step of the rear frame mold base 201 and the height of the multi - petal rear base cover plate 203 does not exceed the height of the fifth step.

[0058] The multi - petal rear support frame side plate 204 is set on the multi - petal rear base cover plate 203, and the height after the multi - petal rear support frame side plate 204 is set on the multi - petal rear base cover plate 203 is higher than the fifth step.

[0059] The multi - petal rear support frame pressing plate 205 is set on the fourth step of the rear frame mold base 201. A cavity four for forming the rear half - frame of the main load - bearing frame is formed between the multi - petal rear support frame pressing plate 205 and the fifth step. After the end face of the multi - petal rear support frame pressing plate 205 facing the fourth step contacts the side of the multi - petal rear cover plate 202 extending beyond the top end face of the fourth step, a cavity five for forming the rear half - frame of the main load - bearing frame is formed between the end face of one side of the multi - petal rear support frame pressing plate 205 and the end face of the side of the fourth step, and the end face of the other side extends beyond the fifth step.

[0060] After removing the multi - petal rear support frame side plate 204, the multi - petal rear first outer carbon fiber side plate 206 is set on the multi - petal rear base cover plate 203. A cavity six for forming the rear half - frame of the main load - bearing frame is formed between the end face of the multi - petal rear first outer carbon fiber side plate 206 facing the fifth step, the multi - petal rear support frame pressing plate 205, the multi - petal rear base cover plate 203, and the lateral end face of the fifth step.

[0061] After removing the multi - petal rear base cover plate 203, the multi - petal rear support frame side plate 204, and the multi - petal rear first outer carbon fiber side plate 206, the multi - petal rear second outer carbon fiber side plate 207 is set on the sixth step of the rear frame mold base 201, and the multi - petal rear second outer carbon fiber side plate 207 limits the thickness of the cavity six.

[0062] The multi - petal rear inner carbon fiber pressing plate 208 is set on the multi - petal rear cover plate 202 and the fifth step, and the multi - petal rear inner carbon fiber pressing plate 208 limits the thickness of the cavity five.

[0063] In this embodiment, the cavity four, the cavity five, and the cavity six are connected to form the rear half - frame of the main load - bearing frame.

[0064] In this embodiment, a plurality of gap control components 300 are evenly distributed on the front frame mold base 101 and are buckled on the to - be - formed front half - frame of the main load - bearing frame on the third step 1013 and the second step 1012 of the front frame mold base 101 to adjust the gap when the front half - frame mold 100 and the rear half - frame mold 200 are assembled together.

[0065] In this embodiment, the front half-frame mold 100 and the rear half-frame mold 200 are connected by bolts and nuts in cooperation.

[0066] When this application is in operation, the following steps are specifically followed for implementation:

[0067] Step 1: As Figure 2 shown, use the front-frame mold base 101 and lay fiberglass cloth on the front-frame mold base 101;

[0068] Step 2: As Figure 3 shown, after the fiberglass cloth is cured, use the front-frame mold base 101 and the multi-piece front cover plate 102 to conduct internal rough laying on the cavity two 500;

[0069] Step 3: As Figure 4 shown, after conducting internal rough laying on the cavity two 500, use the multi-piece front internal carbon yarn pressing plate 108 to limit the thickness of the cavity two 500;

[0070] Step 4: As Figure 5 shown, use the multi-piece front base cover plate 103 and the multi-piece front support frame side plate 104 on the front-frame mold base 101, and after applying pressure, conduct rough laying on the cavity one 400;

[0071] Step 5: As Figure 6 shown, use the multi-piece front base cover plate 103, the multi-piece front first outer carbon yarn side plate 106 and the multi-piece front support frame pressing plate 105 on the front-frame mold base 101 to conduct rough laying on the cavity three 600, and apply pressure to the cavity three 600 and the cavity two 500 respectively to limit the thickness;

[0072] Step 6: As Figure 7 shown, after using the multi-piece front cover plate 102, the multi-piece front support frame pressing plate 105 and the multi-piece front second outer carbon yarn side plate 107 on the front mold base 101 to complete the limiting of the cavity one 400, the cavity two 500 and the cavity three 600, form the front half of the main load-bearing frame;

[0073] Step 7: Use the components in the rear half-frame mold 200 on the rear mold base 201, and repeat Steps 1 to 6 to form the rear half of the main load-bearing frame;

[0074] Step 8: As Figure 8 shown, evenly set the gap control component 300 on the front mold base 101, and the gap control component 300 is buckled on the front half of the main load-bearing frame to be formed on the third step 1013 and the second step 1012 of the front-frame mold base 101;

[0075] Step 9: As Figure 9As shown, after connecting the front half-frame mold 100 and the rear half-frame mold 200 together with the formed front half of the main load-bearing frame and the formed rear half of the main load-bearing frame by means of bolts and nuts, the gap control assembly 300 is located between the front half of the main load-bearing frame and the rear half of the main load-bearing frame formed in the front panel frame mold and the rear panel frame mold, ensuring that the distance between the front half of the main load-bearing frame and the rear half of the main load-bearing frame is exactly the thickness of the gap control assembly, so that there is no problem of assembly tolerance when assembling other parts;

[0076] Step Ten: Lift the assembled front half-frame mold 100 and rear half-frame mold 200 to the rear of the fuselage to complete demolding.

[0077] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A combined tooling for forming a main bearing frame, characterized in that: It includes a front half frame mold for forming the front half frame of the main load-bearing frame and a rear half frame mold for forming the rear half frame of the main load-bearing frame. The front half frame mold and the rear half frame mold are symmetrical structures. A plurality of gap control components are arranged between the front half frame mold and the rear half frame mold. The gap control components control the gap between the front half frame mold and the rear half frame mold.

2. The combined tooling for forming the main bearing frame according to claim 1, characterized in that: The front half frame mold comprises a front frame mold base, a multi-petal front cover plate, a multi-petal front base cover plate, a multi-petal front support frame side plate, a multi-petal front support frame pressure plate, a multi-petal front first outer carbon yarn side plate, a multi-petal front second outer carbon yarn side plate and a multi-petal front inner carbon yarn pressure plate; The front frame mold base is provided with a first step, a second step and a third step for forming the front half frame of the main load-bearing frame; After the multi-petal front cover is arranged on the first step on the front frame mold base, the edge of the multi-petal front cover extends out of the top end surface of the first step; The multi-petal front base cover plate is fitted on the third step on the front frame mold base, and the height of the multi-petal front base cover plate does not exceed the height of the second step; The multi-petal front support frame side panels are arranged on the multi-petal front base cover plate, and the height of the multi-petal front support frame side panels after being arranged on the multi-petal front base cover plate is higher than the second step; The multi-petal front support frame pressing plate is arranged on the second step on the front frame mold base, and a cavity 1 for forming the front half frame of the main load-bearing frame is formed between the multi-petal front support frame pressing plate and the second step. After the end face of the multi-petal front support frame pressing plate facing the first step contacts the side of the multi-petal front cover plate extending out of the top end face of the first step, a cavity 2 for forming the front half frame of the main load-bearing frame is formed between the end face of one side of the multi-petal front support frame pressing plate and the end face of the side face of the first step, and the end face on the other side extends out of the second step. The multi-petal front first outer carbon yarn side plate is arranged on the multi-petal front base cover plate after the multi-petal front support frame side plate is removed, and a cavity three formed by the front half frame of the main load-bearing frame is formed between the end surface of the multi-petal front first outer carbon yarn side plate facing the second step and the multi-petal front support frame pressure plate, the multi-petal front base cover plate and the end surface of the second step; The multi-petal front second outer carbon yarn side plate is arranged on the third step of the front frame mold base after removing the multi-petal front base cover plate, the multi-petal front support frame side plate and the multi-petal front first outer carbon yarn side plate, and the multi-petal front second outer carbon yarn side plate limits the thickness of the cavity three; The multi-petal front inner carbon yarn pressing plate is arranged on the multi-petal front base cover plate and the second step, and the multi-petal front inner carbon yarn pressing plate limits the thickness of the second cavity.

3. The combined tooling for forming the main bearing frame according to claim 2, characterized in that: The cavity one, cavity two and cavity three are connected to form a front half frame of the main load-bearing frame.

4. The combined tooling for forming a main bearing frame according to claim 1, characterized in that: The rear half frame mold comprises a rear frame mold base, a multi-petal rear cover plate, a multi-petal rear base cover plate, a multi-petal rear support frame side plate, a multi-petal rear support frame pressure plate, a multi-petal rear first outer carbon yarn side plate, a multi-petal rear second outer carbon yarn side plate and a multi-petal rear inner carbon yarn pressure plate; The rear frame mold base is provided with a fourth step, a fifth step and a sixth step for forming the rear half frame of the main load-bearing frame; After the multi-petal rear cover is arranged on the fourth step on the rear frame mold base, the edge of the multi-petal rear cover extends out of the top end surface of the fourth step; The multi-petal rear base cover plate is fitted on the sixth step on the rear frame mold base, and the height of the multi-petal rear base cover plate does not exceed the height of the fifth step; The multi-petal rear support frame side panels are arranged on the multi-petal rear base cover plate, and the height of the multi-petal rear support frame side panels after being arranged on the multi-petal rear base cover plate is higher than the fourth step; The multi-petal rear support frame pressing plate is arranged on the fourth step on the rear frame mold base, and a cavity four formed by the rear half frame of the main load-bearing frame is formed between the multi-petal rear support frame pressing plate and the fourth step. After the end face of the multi-petal rear support frame pressing plate facing the fourth step contacts the side of the multi-petal rear cover plate extending out of the top end face of the fourth step, a cavity five formed by the rear half frame of the main load-bearing frame is formed between the end face of one side of the multi-petal rear support frame pressing plate and the end face of the side face of the fourth step, and the end face on the other side extends out of the fourth step. The multi-petal rear first outer carbon yarn side plate is arranged on the multi-petal rear base cover plate after the multi-petal rear support frame side plate is removed, and a cavity six formed by the rear half frame of the main load-bearing frame is formed between the end surface of the multi-petal rear first outer carbon yarn side plate facing the fifth step and the multi-petal rear support frame pressure plate, the multi-petal rear base cover plate and the end surface of the fifth step; The multi-petal rear second outer carbon yarn side plate is arranged on the sixth step of the rear frame mold base after removing the multi-petal rear base cover plate, the multi-petal rear support frame side plate and the multi-petal rear first outer carbon yarn side plate, and the multi-petal rear second outer carbon yarn side plate limits the thickness of the cavity six; The multi-petal front inner carbon yarn pressing plate is arranged on the multi-petal front base cover plate and the second step, and the multi-petal front inner carbon yarn pressing plate limits the thickness of the cavity five.

5. The combined tooling for forming the main bearing frame according to claim 4, characterized in that: The cavity four, cavity five and cavity six are connected to form the rear half frame of the main load-bearing frame.

6. The combined tooling for forming a main bearing frame according to claim 1, characterized in that: The plurality of gap control components are evenly distributed on the front frame mold base and buckled on the third step of the front frame mold base and the front half frame of the main load-bearing frame to be formed on the second step to adjust the gap when the front half frame mold and the rear half frame mold are assembled together.

7. The combined tooling for forming a main bearing frame according to claim 1, characterized in that: The front half frame mold and the rear half frame mold are connected by bolts and nuts.

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