Forming die of composite material head cabin section and processing technology of composite material head cabin section

Abstract

The invention discloses a composite material head cabin section forming mold and a composite material head cabin section machining process, the composite material head cabin section forming mold comprises a forming mold A and a forming mold B. The forming mold A and the forming mold B can be spliced into a complete female mold, the forming mold A comprises a rack A, and the female mold A is fixed in the middle of one side of the rack A; splicing plates A spliced with the mold B are arranged on the two sides of the female mold A respectively, the forming mold B comprises a rack B, the female mold B is fixed to the middle of one side of the rack B, and splicing plates B spliced with the mold A are arranged on the two sides of the female mold B respectively; organic allowance stop blocks are fixed on the upper end surfaces of the forming mold A and the forming mold B outside the upper ends of the female mold A and the female mold B; the forming die further comprises a first reinforcing frame positioning tool used for fixing the first reinforcing frame and a second reinforcing frame positioning tool used for fixing the second reinforcing frame.

Description

Technical Field

[0001] The invention belongs to the technical field of composite material molding, and relates to a molding die for a composite material head cabin section and a processing technology for the composite material head cabin section. Background Art

[0002] The seeker cabin is one of the core components in precision-guided weapon systems. The composite seeker cabin section is derived from the modern stringent requirements for light weight, high strength and multi-function. With the advancement of aerospace and defense industry technology, traditional metal materials have been limited in the design of advanced seekers due to their heavy weight, poor electromagnetic compatibility, and insufficient radar stealth performance. The composite head cabin section of metal materials has the following disadvantages: 1. The metal material cannot meet the wave transmission performance, is heavy, and has insufficient radar stealth performance; 2. Both the internal and external surfaces require processing at a high cost; 3. The connection between the frame and the body requires the design and manufacture of assembly tooling, which is costly. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a composite material head compartment section molding die and composite material head compartment section processing technology that can solve the above problems

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A forming mold for a composite head compartment section, comprising a forming mold A and a forming mold B, wherein the forming mold A and the forming mold B can be spliced ​​into a complete female mold, wherein the forming mold A comprises a frame A, wherein a female mold A is fixed in the middle of one side of the frame A, and splicing plates A for assembling with the mold B are respectively provided on both sides of the female mold A, and the forming mold B comprises a frame B, wherein a female mold B is fixed in the middle of one side of the frame B, and splicing plates B for assembling with the mold A are respectively provided on both sides of the female mold B;

[0006] An organic excess stopper is fixed on the upper end surface of the forming mold A and the forming mold B outside the upper end of the female mold A and the female mold B;

[0007] The molding die also includes a reinforcement frame one positioning tool for fixing the reinforcement frame one and a reinforcement frame two positioning tool for fixing the reinforcement frame two.

[0008] Furthermore, the reinforcement frame positioning tooling includes a support frame and a fixing frame. The lower end of the fixing frame is a U-shaped bayonet that matches the reinforcement frame. The bayonet is clamped on the reinforcement frame to fix the reinforcement frame. One end of the support frame can be detachably fixed on the upper end surfaces of the molding mold A and the molding mold B, and the upper end of the fixing frame is fixed on the lower end surface of the other end of the support frame.

[0009] Furthermore, the reinforcement frame 2 positioning tooling includes a support frame 2 and a fixed frame 2. The lower end of the fixed frame 2 is a U-shaped bayonet 2 that cooperates with the reinforcement frame 2. The bayonet 2 is clamped on the reinforcement frame 2 to fix the reinforcement frame 2. One end of the support frame 2 can be detachably fixed on the upper end surfaces of the molding mold A and the molding mold B, and the upper end of the fixed frame 2 is fixed on the lower end surface of the other end of the support frame 2.

[0010] Furthermore, the mating surfaces of the female molds A and B that match the skin of the composite head compartment section are designed with corresponding convex and concave mating features.

[0011] A composite material head compartment section processing process comprises the following steps:

[0012] Step 1: First, the forming mold A of the composite material head cabin section is combined with the forming mold B of the composite material head cabin section, and the assembly machine adds a surplus stopper;

[0013] Step 2: Start laying the composite material of the skin, wrap it in a vacuum bag, and put it into the autoclave for curing;

[0014] Step 3: After being cooled out of the can, it is transferred to a machining lathe to machine the matching surfaces of the inner surface of the composite head cabin section with the reinforcement frame 1 and the reinforcement frame 2;

[0015] Step 4: After the processing is completed, the reinforcement frame 1 and the reinforcement frame 2 are adapted to ensure that the clearance between the mating surfaces meets the requirements, the trial assembly is smooth, and the end surface of the composite material head cabin section is processed to the required height;

[0016] Step 5: Apply glue to the mating surfaces of the reinforcement frame 1, the reinforcement frame 2 and the composite head compartment section, install them into the composite head compartment section, fix the reinforcement frame 1 with the reinforcement frame 1 positioning tool, and fix the reinforcement frame 2 with the reinforcement frame 2 positioning tool. After the glue on the mating surface is cured, remove the reinforcement frame 1 positioning tool and the reinforcement frame 2 positioning tool, and process the inner cavities of the reinforcement frames 1 and 2;

[0017] Step six: disassemble the composite head cabin section forming mold A and the composite head cabin section forming mold B, take out the composite head cabin section to process the window outer contour and the rivet holes of the reinforcement frame 1 and the reinforcement frame 2, and then perform rivet connection after completion.

[0018] Furthermore, in step one, a sealing rubber strip is first placed in the sealing groove of the mating surface of the molding mold A of the composite head compartment section, and then the molding mold A of the composite head compartment section is molded with the molding mold B of the composite head compartment section, and the bolts are tightened.

[0019] Furthermore, in step two, when starting to lay the composite material of the skin, the nose cone embedded block is placed, the window thickening area is positioned and laid, and the temperature and pressure are increased and compacted in the autoclave. After compaction, the surface is trimmed and the layers are laid, and then the surface is covered with a vacuum bag and put into the autoclave for curing.

[0020] Furthermore, the detailed steps of step three are to remove auxiliary materials such as the vacuum bag after the can is cooled, disassemble the machined excess block, transfer it to the machine tool, level the mold with reference to the end faces of the molding mold A and the molding mold B of the composite head compartment section, fix it with clamps, align it according to the reference holes on the mold, and machine the matching surfaces with the reinforcement frames 1 and 2 on the inner surface of the composite head compartment section.

[0021] The beneficial effects of the present invention are:

[0022] The composite material head compartment skin created by the present invention uses a wave-transmitting composite material, adopts a female split mold, a metal mold sealing structure, and is designed with a guide head machining device and multiple sets of reinforcement frame positioning tooling. The present invention creates a structural form that combines molding, machining, and assembly functions in one, reducing the manufacturing cost of tooling molds. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic structural diagram of a composite material head compartment section according to an embodiment of the present invention;

[0025] Figure 2 It is a schematic structural diagram of a forming mold according to an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1. Composite material head cabin section; 11. Skin; 12. Reinforcement frame 1; 13. Reinforcement frame 2; 2. Forming die A; 3. Forming die B; 4. Machined excess block; 5. Reinforcement frame 1 positioning tool; 6. Reinforcement frame 2 positioning tool. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0032] As shown in the figure, the composite head compartment section 1 includes a cavity surrounded by a skin 11 and similar to a cone barrel structure. A circle of reinforcing frame 12 is fixed to the skin 11 near the cone barrel opening in the cavity through connecting rivets, and a circle of reinforcing frame 2 13 is fixed to the inner wall of the skin 11 in the middle and upper part of the cavity through connecting rivets. The skin 11 is formed by curing of wave-transmitting composite materials. The outer profile of the composite head compartment section 1 is the product surface.

[0033] A forming mold for a composite head compartment section includes a forming mold A2 and a forming mold B3. The forming mold A2 and the forming mold B3 can be spliced ​​into a complete female mold. The forming mold A2 and the forming mold B3 each account for half of the ratio. The forming mold A2 includes a frame A, a female mold A is fixed in the middle of one side of the frame A, and the two sides of the female mold A are respectively splicing plates A assembled with the mold B. The forming mold B3 includes a frame B, a female mold B is fixed in the middle of one side of the frame B, and the two sides of the female mold B are respectively splicing plates B assembled with the mold A. The mating surfaces of the female mold A and the female mold B that match the skin 11 of the composite head compartment section 1 are designed with corresponding convex and concave mating features. The splicing plates A and B are fixed by bolts.

[0034] In order to ensure the airtightness of the mold, the mold surfaces of the molding mold A2 and the molding mold B3 are provided with a sealant groove for placing a sealing strip.

[0035] The upper edge of the splicing plate A on both sides of the female mold A is provided with a positioning protrusion integrated with the splicing plate A, and the corresponding upper edge of the splicing plate B on both sides of the female mold B is provided with a positioning groove integrated with the splicing plate B, and the positioning protrusion and the positioning groove match each other.

[0036] A machined excess stopper 4 is fixed on the upper end surfaces of the molding molds A2 and B3 outside the upper ends of the female molds A and B. The machined excess stopper 4 is positioned between the molds using pins and fixed with screws.

[0037] The molding die also includes a reinforcement frame one positioning fixture 5 for fixing the reinforcement frame one 12 and a reinforcement frame two positioning fixture 6 for fixing the reinforcement frame two 13 .

[0038] The reinforcement frame positioning tool 5 includes a support frame and a fixing frame. The lower end of the fixing frame is a U-shaped bayonet that matches the reinforcement frame 12. The bayonet is clamped on the reinforcement frame 12 to fix the reinforcement frame 12. One end of the support frame can be detachably fixed on the upper end surface of the molding mold A2 and the molding mold B3, and the upper end of the fixing frame is fixed on the lower end surface of the other end of the support frame.

[0039] The reinforcement frame 2 positioning tool 6 includes a support frame 2 and a fixing frame 2. The lower end of the fixing frame 2 is a U-shaped bayonet 2 that matches the reinforcement frame 2 13. The bayonet 2 is clamped on the reinforcement frame 2 13 to fix the reinforcement frame 2 13. One end of the support frame 2 can be detachably fixed on the upper end surface of the molding mold A2 and the molding mold B3, and the upper end of the fixing frame 2 is fixed on the lower end surface of the other end of the support frame 2.

[0040] A composite material head compartment section 1 processing technology:

[0041] Step 1: First, place a sealing rubber strip in the sealing groove of the butt-jointed surface of the molding die A2 of the composite head compartment section 1, then close the molding die A2 of the composite head compartment section 1 with the molding die B3 of the composite head compartment section 1, tighten the bolts, assemble the machine-added excess stopper 4 on the mold end face in the closed mold state, and use pins to position the machine-added excess stopper 4 and the molding die A2 and the molding die B3, and fix them with screws;

[0042] Step 2: Start laying the composite material of the skin 11, place the nose cone embedded block, position and lay the window thickened area, put it into the autoclave for heating and pressurizing, and after compaction, perform surface finishing and laying, cover with vacuum bag, and put it into the autoclave for curing;

[0043] Step 3: After the can is cooled, remove the vacuum bag and other auxiliary materials, disassemble the machined excess stopper 4, transfer it to the machine tool, and level the mold with reference to the end surface of the molding mold A2 of the composite head cabin section 1 and the molding mold B3 of the composite head cabin section 1, fix it with a clamp, align it according to the reference hole on the mold, and machine the matching surface of the inner surface of the composite head cabin section 1 with the reinforcement frame 12 and the reinforcement frame 2 13;

[0044] Step 4: After the processing is completed, the reinforcement frame 1 12 and the reinforcement frame 2 13 are adapted to ensure that the clearance between the mating surfaces meets the requirements, the trial assembly is smooth, and the end surface of the composite material head cabin section 1 is processed to the required height;

[0045] Step 5: Apply glue to the mating surfaces of the reinforcement frame 1 12, the reinforcement frame 2 13 and the composite head compartment section 1, install them into the composite head compartment section 1, use the reinforcement frame 1 positioning fixture 5 and the reinforcement frame 2 positioning fixture 6 to fix the relative positions of the reinforcement frame 1 12 and the reinforcement frame 2 13 respectively, remove the reinforcement frame 1 positioning fixture 5 and the reinforcement frame 2 positioning fixture 6 after the glue on the mating surface is cured, and process the inner cavities of the reinforcement frame 12 and the reinforcement frame 2 13 to ensure that the shape and position accuracy meets the use requirements;

[0046] Step six: disassemble the molding mold A2 and the molding mold B3 of the composite head compartment section 1, take out the composite head compartment section 1 to process the outer contour of the window and the rivet holes of the reinforcement frame 12 and the reinforcement frame 2 13, and then perform rivet connection after completion.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A molding die for a composite material head compartment section, characterized in that: The molding die A (2) and the molding die B (3) can be assembled into a complete female mold. The molding die A (2) includes a frame A, a female mold A is fixed in the middle of one side of the frame A, and two sides of the female mold A are respectively connected with a splicing plate A for assembling with the mold B. The molding die B (3) includes a frame B, a female mold B is fixed in the middle of one side of the frame B, and two sides of the female mold B are respectively connected with the splicing plate B for assembling with the mold A. An organic excess stopper (4) is fixed on the upper end surfaces of the forming mold A (2) and the forming mold B (3) outside the upper ends of the female mold A and the female mold B; The molding die also includes a reinforcement frame one positioning tool (5) for fixing the reinforcement frame one (12) and a reinforcement frame two positioning tool (6) for fixing the reinforcement frame two (13).

2. The forming die of the composite material head compartment section according to claim 1, characterized in that: The reinforcement frame positioning tool (5) comprises a support frame and a fixing frame. The lower end of the fixing frame is a U-shaped bayonet that matches the reinforcement frame (12). The bayonet is clamped on the reinforcement frame (12) to fix the reinforcement frame (12). One end of the support frame can be detachably fixed on the upper end surface of the molding mold A (2) and the molding mold B (3). The upper end of the fixing frame is fixed on the lower end surface of the other end of the support frame.

3. The forming die of the composite material head compartment section according to claim 1, characterized in that: The reinforcing frame 2 positioning tool (6) comprises a supporting frame 2 and a fixing frame 2. The lower end of the fixing frame 2 is a U-shaped bayonet 2 which matches the reinforcing frame 2 (13). The bayonet 2 is clamped on the reinforcing frame 2 (13) to fix the reinforcing frame 2 (13). One end of the supporting frame 2 can be detachably fixed on the upper end surfaces of the forming mold A (2) and the forming mold B (3). The upper end of the fixing frame 2 is fixed on the lower end surface of the other end of the supporting frame 2.

4. The forming die of the composite material head compartment section according to claim 1, characterized in that: The matching surfaces of the female mold A and the female mold B and the skin (11) of the composite material head compartment section (1) are designed with corresponding convex and concave matching features.

5. A composite material head compartment section processing process according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: firstly, the molding die A (2) of the composite material head compartment section (1) and the molding die B (3) of the composite material head compartment section (1) are molded together, and the assembly machine is equipped with a residual stopper (4); Step 2: Begin laying the composite material of the skin (11), wrap it in a vacuum bag, and put it into an autoclave for curing; Step 3: After being taken out of the can and cooled, the product is transferred to a machining lathe to machine the matching surfaces of the inner surface of the composite head compartment section (1) with the reinforcement frame 1 (12) and the reinforcement frame 2 (13); Step 4: After the processing is completed, the reinforcement frame 1 (12) and the reinforcement frame 2 (13) are adapted to ensure that the clearance between the mating surfaces meets the requirements and the test assembly is smooth, and the end surface of the composite material head compartment section (1) is processed to the required height; Step 5: Apply glue to the mating surfaces of the reinforcement frame 1 (12), the reinforcement frame 2 (13) and the composite head compartment section (1), install them into the composite head compartment section (1), fix the reinforcement frame 1 (12) with the reinforcement frame 1 positioning fixture (5), and fix the reinforcement frame 2 (13) with the reinforcement frame 2 positioning fixture (6), and after the glue on the mating surfaces is cured, remove the reinforcement frame 1 positioning fixture (5) and the reinforcement frame 2 positioning fixture (6), and process the inner cavities of the reinforcement frame 1 (12) and the reinforcement frame 2 (13); Step 6: Disassemble the molding die A (2) and the molding die B (3) of the composite head compartment section (1), take out the composite head compartment section (1), process the outer contour of the window and the rivet holes of the reinforcement frame 1 (12) and the reinforcement frame 2 (13), and then perform riveting connection after completion.

6. The composite material head compartment section processing process according to claim 5 is characterized in that: In step one, a sealing rubber strip is first placed in the sealing groove of the mating surface of the molding mold A (2) of the composite head compartment section (1), and then the molding mold A (2) of the composite head compartment section (1) and the molding mold B (3) of the composite head compartment section (1) are molded together and the bolts are tightened.

7. The composite material head compartment section processing process according to claim 5 is characterized in that: In step 2, when the composite material of the skin (11) is laid, the head cone embedded block is placed, the window thickening area is positioned and laid, and the temperature is increased and the pressure is increased to compact it. After compaction, the surface is trimmed and the layers are laid, and then the vacuum bag is wrapped and the skin is put into the autoclave for curing.

8. The composite material head compartment section processing process according to claim 5 is characterized in that: The detailed steps of step three are to remove auxiliary materials such as the vacuum bag after the can is cooled, disassemble the machined excess stopper (4), transfer it to the machine tool, level the mold with reference to the molding mold A (2) of the composite head compartment section (1) and the molding mold B (3) of the composite head compartment section (1), fix it with clamps, align it according to the reference hole on the mold, and machine the matching surface of the inner surface of the composite head compartment section (1) with the reinforcement frame 1 (12) and the reinforcement frame 2 (13).

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