Efficient assembling and forming device for composite engine shell
By designing a composite engine case with high efficiency assembly and forming device, using components such as mandrel and retaining ring assembly, the function of assembling two shells of a single mandrel is realized, which solves the problem of long assembly and forming cycle in the prior art, improves production efficiency and reduces costs.
Patent Information
- Application Number
- CN202422012681.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The assembly and forming cycle of existing engine housings is relatively long, resulting in low production efficiency and high cost.
A composite engine housing efficient assembly and forming device is designed, including a mandrel, a rear joint retaining ring assembly, a front joint retaining ring assembly and a front skirt assembly. The assembly and later winding and curing of two shells are completed through a single mandrel.
This device can greatly improve assembly and forming efficiency, simplify joint and skirt installation operations, and reduce labor and equipment costs.
Smart Images
Figure CN222959261U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tooling equipment, in particular to an engine housing assembly tooling. Background Art
[0002] In the 21st century, the engine housing is the main power output structure of various rockets and missile weapons and is widely used in the aerospace field. The main load-bearing structure of the all-composite material cylinder is composed of a fiber winding layer, a front joint, a rear joint, and a front skirt, and the heat insulation structure is composed of a heat insulation layer. Among them, the installation of the front and rear joints and the skirt connection structure are the most important structural components of the housing's external interface. At present, after the single front and rear joints are assembled, the elastic layer is laid and the head is wound, and after a single skirt is assembled, the outer ring of the skirt is wound and fixed, and finally the resin curing of the overall winding layer is completed. Since this assembly and forming method can only complete the curing and forming of one set of housing at a time, the forming cycle is long and the product manufacturing cost is greatly increased. Therefore, how to improve the forming efficiency of the all-composite material housing has always been a technical difficulty in the industry. Content of the Utility Model
[0003] Aiming at the deficiencies in the prior art, the utility model provides an efficient assembly and forming device for a composite material engine housing, which solves the problem of low manufacturing efficiency of the existing engine housing.
[0004] The purpose of the utility model is achieved as follows: An efficient assembly and forming device for a composite material engine housing includes:
[0005] A mandrel for positioning and sleeving the engine housing to be assembled, including a cylinder section and a shaft section, and the shaft ends are located at both ends of the cylinder section;
[0006] A rear joint retaining ring assembly for connecting and limiting the rear joint of the engine housing, sleeved on the cylinder section;
[0007] A front joint retaining ring assembly for connecting and limiting the front joint of the engine housing, sleeved on the shaft end;
[0008] A front skirt upper skirt assembly for connecting the front skirt, sleeved on the shaft end and arranged at the outer end.
[0009] Further, the rear joint retaining ring assembly includes a pair of rear joint threaded retaining ring half-molds. After the two joint threaded retaining ring half-molds are spliced, they are fixed by a lock ring sleeved on the outer periphery. The inner parts of the front ends of the two rear joint threaded retaining ring half-molds are processed with threaded surfaces for threaded connection with the rear joint. The inner peripheries of the two rear joint threaded retaining ring half-molds are processed with inner bosses, and the outer periphery of the cylinder section is processed with outer bosses for cooperating with the inner bosses.
[0010] Further, an opening groove is provided at the butting surface of the two rear joint threaded retaining ring half-molds.
[0011] Further, the front joint retaining ring assembly includes a front joint retaining ring and a front joint round nut. The outer circumferential surface of the front joint retaining ring is machined with a threaded surface that is threadedly connected to the front joint. The inner circumferential surface of the front joint retaining ring is a smooth hole that is sleeved on the shaft section. The front joint round nut is threadedly connected to the shaft section, and the corresponding position of the shaft section is machined with a thread.
[0012] Further, the front skirt upper skirt assembly includes an upper skirt tooling and an upper skirt nut. The upper skirt tooling includes a large end ring and a small end ring connected by ribs. The large end ring is used to connect the front skirt, and the small end ring is used to be sleeved on the shaft section. The upper skirt nut is threadedly connected to the shaft section, and the corresponding position of the shaft section is machined with a thread.
[0013] Further, connecting screws for connecting the front skirt are provided on the end face of the large end ring.
[0014] Further, two sets of the rear joint retaining ring assembly, the front joint retaining ring assembly, and the front skirt upper skirt assembly are provided.
[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: By using this device, the assembly and subsequent winding and curing of 2 composite material shells can be completed through a single mandrel, and the installation operations of the front and rear joints and the front skirt are simplified, greatly improving the assembly and forming efficiency, and simultaneously reducing costs in aspects such as labor and equipment. Description of the Drawings
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative efforts.
[0017] Figure 1 It is a schematic structural diagram of the present utility model.
[0018] Figure 2 It is a schematic structural diagram of the mandrel in the present utility model.
[0019] Figure 3 It is a schematic structural diagram of the rear joint retaining ring assembly in the present utility model.
[0020] Figure 4 It is a schematic structural diagram of the front joint retaining ring assembly in the present utility model.
[0021] Figure 5 It is a schematic structural diagram of the front skirt upper skirt assembly in the present utility model.
[0022] Figure 6 It is an assembly schematic diagram of the present utility model.
[0023] Figure 7 is Figure 6 a sectional view of
[0024] Figure 8 is Figure 7 an enlarged view of portion A in
[0025] Figure 9 is Figure 7 an enlarged view of portion B in
[0026] Among them, 100 is the mandrel, 101 is the cylinder section, 102 is the shaft section, 103 is the outer convex platform, 200 is the rear joint retaining ring assembly, 201 is the semi - die of the rear joint thread retaining ring, 201a is the opening groove, 201b is the inner convex platform, 202 is the locking ring, 300 is the front joint retaining ring assembly, 301 is the front joint retaining ring, 301a is the step surface, 302 is the front joint round nut, 400 is the front skirt upper skirt assembly, 401 is the upper skirt tooling, 401a is the large - end ring, 401b is the small - end ring, 401c is the rib, 402 is the upper skirt nut, 403 is the connecting screw, 500 is the engine housing, 501 is the front joint, 502 is the rear joint, 503 is the front skirt. Specific embodiments
[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.
[0028] As Figures 1-9 shown, a high - efficiency assembly and forming device for a composite material engine housing includes:
[0029] The mandrel 100 is used to position and sleeved with the engine housing 500 to be assembled, and includes a cylinder section 101 and a shaft section 102, and the shaft ends are located at both ends of the cylinder section 101;
[0030] The rear joint retaining ring assembly 200 is used to connect and limit the rear joint 502 of the engine housing 500, and is sleeved on the cylinder section 101;
[0031] The front joint retaining ring assembly 300 is used to connect and limit the front joint 501 of the engine housing 500, and is sleeved on the shaft end;
[0032] The front skirt upper skirt assembly 400 is used to connect the front skirt 503, is sleeved on the shaft end, and is arranged at the outer end;
[0033] Both the rear joint retaining ring assembly 200, the front joint retaining ring assembly 300, and the front skirt upper skirt assembly 400 are provided with two groups.
[0034] Specifically, the middle part of the core shaft 100 is the barrel section 101, and an arc surface transition is adopted between the two ends of the barrel section 101 and the shaft section 102. The rear joint retaining ring assembly 200 is sleeved on the middle part of the barrel section 101, and the two front joint retaining ring assemblies 300 and the two front skirt upper skirt assemblies 400 are all arranged on the shaft ends at both ends of the core shaft 100; after the front and rear joints 502 are installed, the middle section composite material of the shell is paved, and finally the skirt is assembled in cooperation with the front skirt upper skirt assembly 400.
[0035] Furthermore, the rear joint retaining ring assembly 200 includes a pair of rear joint threaded retaining ring half-molds 201, which are fixed by a locking ring 202 sleeved on the outer periphery after being spliced. The front end of the two rear joint threaded retaining ring half-molds 201 are internally processed with threaded surfaces that are threadedly connected to the rear joint 502, the inner periphery of the two rear joint threaded retaining ring half-molds 201 is processed with an inner boss 201b, and the outer periphery of the barrel section 101 is processed with an outer boss 103 that cooperates with the inner boss 201b.
[0036] Specifically, three bosses are arranged on the outer periphery of the barrel section 101 , and two limiting grooves for installing the inner bosses 201 b of the two rear joint retaining ring assemblies 200 are formed between the three bosses; each pair of rear joint threaded retaining ring half-molds 201 is equipped with two locking rings 202 .
[0037] It should be noted that the rear joint retaining ring assembly 200 is designed as a pair of rear joint threaded retaining ring half molds 201, which makes its assembly more convenient and can be easily assembled by splicing and then fixed with a locking ring 202.
[0038] Furthermore, an opening groove 201a is provided at the butt joint surface of the two rear joint threaded retaining ring half-molds 201.
[0039] It should be noted that the opening groove 201a is designed to allow a wrench to be inserted into the prying opening during demoulding and disassembly, thereby further facilitating demoulding.
[0040] Furthermore, the front joint retaining ring assembly 300 includes a front joint retaining ring 301 and a front joint 501 round nut 302, the outer cylindrical surface of the front joint retaining ring 301 is processed with a threaded surface threadedly connected to the front joint 501, and the inner cylindrical surface of the front joint retaining ring 301 is a smooth hole sleeve on the shaft segment 102; the front joint 501 round nut 302 is threadedly connected to the shaft segment 102, and the corresponding position of the shaft segment 102 is processed with threads.
[0041] Specifically, the outer periphery of the front joint retaining ring 301 is processed to form a step surface 301a, the thread is processed on the axial surface, and the radial surface is used to contact the end surface of the front joint 501. The diameter of the shaft section 102 on which the front joint retaining ring 301 is mounted is larger than the diameter of the shaft section 102 on which the nut of the front joint 501 is mounted.
[0042] It should be noted that by tightening the round nut 302 of the front joint 501, its end face is pressed against the rear end face of the front joint retaining ring 301, and the front end face of the front joint retaining ring 301 contacts the root of the shaft section 102, thereby pressing it against the shaft section 102.
[0043] Furthermore, the front skirt upper skirt assembly 400 includes an upper skirt tooling 401 and an upper skirt nut 402. The upper skirt tooling 401 includes a large end ring 401a and a small end ring 401b connected by ribs 401c. The large end ring 401a is used to connect the front skirt 503, and the small end ring 401b is used to be sleeved on the shaft segment 102. The upper skirt nut 402 is threadedly connected to the shaft segment 102. The shaft segment 102 has threads processed at corresponding positions. A connecting screw 403 for connecting the front skirt 503 is provided on the end face of the large end ring 401a.
[0044] Specifically, the inner circle of the large-end circular ring 401 a is provided with an inner step to cooperate with the clamping of the front skirt 503 , and the connecting screws 403 are used to connect the front skirt 503 .
[0045] The utility model is further described below with reference to specific application examples.
[0046] A highly efficient assembly and molding device for a composite material engine casing 500, comprising:
[0047] The front joint retaining ring 301 has an M60×1.5 external thread on its outer circumference, which can be screwed into the M60×1.5 internal thread of the front joint 501 of the shell for installation; the inner circumference has a ø52mm light hole, which can be inserted into the core shaft 100 and slide against the ø52mm outer cylindrical surface of the core shaft 100; the end of the tail has a positioning flat surface, which can be fitted and positioned with the positioning step end face of the front joint 501 of the core shaft 100.
[0048] The M42×1.5 front joint 501 round nut 302 has a positioning flat on one end, which can be fitted and fixed with the front end surface of the front joint retaining ring 301; the inner circular surface has an M42×1.5 internal thread, which can be screwed into the M42×1.5 external thread of the core shaft 100.
[0049] The two rear joint threaded retaining ring half molds 201 can be assembled together to form a whole cylinder. The docking surface contains 4 groups of 3mm open grooves 201a, which can be used for inserting a wrench into the prying mouth during demoulding and disassembly; the inner circular surface contains M166×2 internal threads, which can be matched and fitted with the rear joint 502M166×2 external threads; the inner circular surface also contains an inner cylindrical positioning step, which can be fitted and limited with the limiting step at the tail end of the core shaft 100600.
[0050] The front skirt upper skirt assembly 400 has three ø3.5mm light holes on the large end ring 401a, which can be inserted with M3 screws, and the large end ring 401a can be fitted and connected with the end surface of the front skirt 503 and fixed with M3 screws; the small end ring 401b has a positioning flat surface, which can be fitted and fixed with the M36×1.5 upper skirt nut 402.
[0051] The M36×1.5 upper skirt nut 402 has a positioning flat surface at one end, which can be fitted and fixed with the small end ring 401b; the inner circular surface has an M36×1.5 internal thread, which can be screwed into the M36×1.5 external thread of the core shaft 100.
[0052] The method of using the device includes the following steps:
[0053] Step 1) Install the front joint 501; stick demoulding cloth on the connection surfaces of the two groups of front joints 501 and the two groups of front joint retaining rings 301 for protection, tighten the M60×1.5 external thread of each group of front joint retaining rings 301 on the M60×1.5 internal thread of each group of front joints 501, so that the front joint retaining rings 301 and the connection surfaces of the front joints 501 fit tightly, and then put the ø52mm inner circular surfaces of the two groups of front joint retaining rings 301 connected with the front joints 501 through the ø52mm outer cylindrical surfaces of the mandrel 100 on the mandrels 100 at both ends, and adjust the tail end faces of the front joint retaining rings 301 to fit with the positioning step end faces of the front joints 501 on the mandrel 100, tighten the two groups of M42×1.5 round nuts 302 of the front joints 501 to fit the front joint retaining rings 301, and limit and fix the front joint retaining rings 301.
[0054] Step 2) Install the rear joint 502; insert the two sets of rear joints 502 into the two ends of the mandrel 100 respectively, and continue to push the two sets of rear joints 502 inwardly along the mandrel 100 toward the opposite sides until the tail end faces of the two sets of rear joints 502 fit with the positioning steps of the rear joints 502 of the mandrel 100, and finally put the two sets of rear joint 502 threaded retaining rings on the rear joint 502 and the limiting steps of the mandrel 100 respectively, and at the same time ensure that the M166×2 internal thread of the threaded retaining ring of the rear joint 502 fits with the M166×2 external thread of the rear joint 502, and the inner cylindrical step of the threaded retaining ring fits and is fixed with the limiting step at the tail end of the mandrel 100;
[0055] Step 3) Install the front skirt 503; respectively, fit the connection surfaces of the two groups of front skirts 503 and the two groups of upper skirt tooling 401 together tightly, and tighten the upper skirt tooling 401 and the threaded holes on the end faces of the front skirt 503 through the M3 connecting screws 403, and then slowly push the upper skirt tooling 401 connected with the front skirt 503 into the shell through the mandrel 100 until the internal positioning surface of the upper skirt tooling 401 fits with the skirt tooling limit step surface 301a of the mandrel 100, and then tighten the M36×1.5 upper skirt nut 402 to fit the upper skirt tooling 401, and limit and fix the upper skirt tooling 401. At this point, the assembly operation of two composite shells can be completed at the same time.
[0056] The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.
Claims
1. A composite material engine casing high-efficiency assembly and molding device, characterized in that: include: The core shaft (100) is used for positioning and sleeve-mounting the engine housing (500) to be assembled, and comprises a barrel section (101) and a shaft section (102), wherein the shaft ends are located at both ends of the barrel section (101); A rear joint retaining ring assembly (200) is used to connect the rear joint (502) of the engine housing (500) and to limit the position, and is sleeved on the barrel section (101); A front joint retaining ring assembly (300) is used to connect the front joint (501) of the engine housing (500) and to limit the position, and is sleeved on the shaft end; The front skirt upper skirt assembly (400) is used to connect the front skirt (503), is sleeved on the shaft end, and is arranged at the outer end.
2. The composite material engine casing high-efficiency assembly and molding device according to claim 1, characterized in that: The rear joint retaining ring assembly (200) comprises a pair of rear joint threaded retaining ring half-molds (201); the two joint threaded retaining ring half-molds are spliced and fixed via a locking ring (202) sleeved on the outer periphery; the front ends of the two rear joint threaded retaining ring half-molds (201) are internally processed with threaded surfaces that are threadedly connected to the rear joint (502); the inner peripheries of the two rear joint threaded retaining ring half-molds (201) are processed with inner bosses (201b); and the outer periphery of the barrel section (101) is processed with outer bosses (103) that cooperate with the inner bosses (201b).
3. The high-efficiency assembly and molding device for composite engine casing according to claim 2, characterized in that: An opening groove (201a) is provided at the butt joint surface of the two rear joint threaded retaining ring half-molds (201).
4. A composite material engine casing high-efficiency assembly and molding device according to any one of claims 1 to 3, characterized in that: The front joint retaining ring assembly (300) comprises a front joint retaining ring (301) and a front joint round nut (302); the outer circumferential surface of the front joint retaining ring (301) is processed with a threaded surface that is threadedly connected to the front joint (501); the inner circumferential surface of the front joint retaining ring (301) is a light hole sleeve mounted on the shaft section (102); the front joint round nut (302) is threadedly connected to the shaft section (102), and a thread is processed at a corresponding position of the shaft section (102).
5. A composite material engine casing high-efficiency assembly and molding device according to any one of claims 1 to 3, characterized in that: The front skirt and upper skirt assembly (400) comprises an upper skirt tooling (401) and an upper skirt nut (402); the upper skirt tooling (401) comprises a large end circular ring (401a) and a small end circular ring (401b) connected via ribs (401c); the large end circular ring (401a) is used to connect the front skirt (503); the small end circular ring (401b) is used to be sleeved on the shaft section (102); the upper skirt nut (402) is threadedly connected to the shaft section (102); and threads are processed at corresponding positions on the shaft section (102).
6. The high-efficiency assembly and molding device for composite engine casing according to claim 5, characterized in that: A connecting screw (403) for connecting to the front skirt (503) is provided on the end surface of the large end circular ring (401a).
7. A composite material engine casing high-efficiency assembly and molding device according to any one of claims 1 to 3, characterized in that: The rear joint retaining ring assembly (200), the front joint retaining ring assembly (300), and the front skirt upper skirt assembly (400) are each provided in two groups.