A high-density large-size carbon-carbon throat liner processing tool

Abstract

The utility model discloses a high density big size carbon carbon throat lining processing frock relates to auxiliary frock technical field, and the two ends of throat lining can not be positioned and clamped quickly and conveniently in prior art, and the clamping and fixing of different specifications throat lining can not be adapted, and the following scheme is presented, including base, the both ends inner wall rotation of base is connected with two -way screw rod, and the rod wall both ends of two -way screw rod are respectively screwed with first clamping subassembly and second clamping subassembly, first clamping subassembly and second clamping subassembly all include movable support. The utility model discloses through the spacing of two movable supports of two -way screw rod adjustment of rotation, makes the both sides rotation pipe and the clamping block to carbon carbon throat lining's both ends and carries out the abutment clamping, cooperates the extension of push rod motor, makes the connecting rod in rotation pipe and conical rod and stretches out outward, and two conical rods are inserted to the through -hole of carbon carbon throat lining, and accurate clamping positioning to carbon carbon throat lining is completed.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tooling technology, and in particular to a tooling for processing high-density, large-size carbon throat liners. Background Technology

[0002] The throat liner is a critical component of the solid rocket motor (SRM) nozzle. During SRM operation, the throat liner must withstand the supersonic erosion and chemical corrosion of high-temperature gases, making its working environment extremely harsh. The convective heat transfer intensity near the throat liner is the most intense in the entire engine nozzle structure. Once the thermal stress exceeds the strength limit, the throat liner will break off and fly out, causing damage to the rocket engine or even a launch accident. Therefore, a high-density, high-performance throat liner is crucial to the quality of the nozzle and SRM. Carbon / carbon composite materials possess a series of advantages, including high strength, stable high-temperature strength, good thermal shock resistance, good ablation resistance, resistance to solid particulate matter erosion, and a low coefficient of thermal expansion. They are commonly used in high-temperature ablation resistant materials and high-temperature structural materials, showing promising application prospects in the aerospace field and are currently widely used in SRM nozzle throat liners.

[0003] Applying an antioxidant coating (such as a SiC coating) or an adaptive lubricating coating to the throat liner surface can reduce friction and adhesion during the use of carbon materials. Existing clamping fixtures cannot quickly and easily position and clamp the two ends of the throat liner, which makes the throat liner prone to deviation during rotation and cannot be adapted to clamping and fixing throat liners of different specifications. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a tooling for processing high-density, large-size carbon carbon throat liners, which overcomes the shortcomings of the prior art and effectively solves the problems that the prior art cannot quickly and conveniently position and clamp the two ends of the throat liners, and cannot be adapted to clamping and fixing throat liners of different specifications.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A tooling for processing high-density, large-size carbon throat liners includes a base. Two bidirectional lead screws are rotatably connected to the inner walls of both ends of the base. A first clamping assembly and a second clamping assembly are screwed to the two ends of the rod wall of the bidirectional lead screws, respectively. The first clamping assembly and the second clamping assembly each include a movable bracket, a rotating tube rotatably connected to the top of the movable bracket, a clamping block sleeved and fixed to one end of the outer wall of the rotating tube, a fixing frame welded and fixed to the top of the outer wall of one side of the movable bracket, a push rod motor installed and fixed to the inner wall of one side of the fixing frame, a connecting rod rotatably connected to the inner rod of the push rod motor, and a tapered rod welded and fixed to one end of the connecting rod.

[0007] The first servo motor drives the bidirectional lead screw to rotate, which in turn moves the screwed movable bracket along the length of the base. Adjusting the distance between the two movable brackets allows the rotating tubes and clamping blocks on both sides to abut and clamp the two ends of the carbon-carbon throat liner. With the extension of the push rod motor, the connecting rod and tapered rod inside the rotating tube extend outward, and the two tapered rods are inserted into the through holes of the carbon-carbon throat liner, which can accurately clamp and position the carbon-carbon throat liner. The second servo motor drives the rotating tube to rotate through the meshing gear set, which in turn rotates the carbon-carbon throat liner clamped and fixed between the two rotating tubes, enabling the carbon-carbon throat liner to be sprayed with external equipment.

[0008] Preferably, mounting blocks are welded and fixed to the outer walls of both sides of the base, and the base is installed and fixed to the external processing equipment by the mounting blocks and bolts.

[0009] The tooling is connected and fixed to external processing equipment via mounting blocks.

[0010] Preferably, a first servo motor is fixedly mounted on the outer wall of one end of the base, and the output shaft of the first servo motor is connected and fixed to one end of a bidirectional lead screw via a coupling.

[0011] The first servo motor drives the bidirectional lead screw to rotate.

[0012] Preferably, the bottom of one side outer wall of the movable bracket is provided with a screw hole adapted to the bidirectional lead screw, and the movable bracket and the base form a sliding fit.

[0013] The rotating bidirectional lead screw drives the screwed movable bracket to move along the length of the base, thereby adjusting the distance between the two movable brackets.

[0014] Preferably, a second servo motor is installed and fixed on the top of the outer wall of one side of the moving bracket in the second clamping assembly, and the output shaft of the second servo motor and the outer wall of the rotating tube are both fitted with meshing gear sets.

[0015] The second servo motor drives the rotating tube to rotate through a set of meshing gears, which in turn rotates the carbon throat liner clamped and fixed between the two rotating tubes.

[0016] Preferably, the maximum outer diameter of the push rod motor is smaller than the inner diameter of the rotating tube, and a groove is provided at one end of the top of the inner wall of the rotating tube.

[0017] When the rotating tube rotates, it will not come into frictional contact with the outer wall of the push rod motor.

[0018] Preferably, the outer diameter of the connecting rod is adapted to the inner diameter of the rotating tube, and a slider that forms a sliding fit with the sliding groove is welded and fixed to the outer wall of the connecting rod.

[0019] The connecting rod can move stably within the rotating tube by sliding the slider in the groove, and the rotating tube can drive the connecting rod to rotate.

[0020] The beneficial effects of this utility model are as follows:

[0021] The distance between the two moving supports is adjusted by rotating the bidirectional lead screw, so that the rotating tubes and clamping blocks on both sides abut and clamp the two ends of the carbon-carbon throat liner. With the extension of the push rod motor, the connecting rod and tapered rod inside the rotating tube extend outward, and the two tapered rods are inserted into the through holes of the carbon-carbon throat liner to complete the accurate clamping and positioning of the carbon-carbon throat liner. With the rotation of the rotating tube, the carbon-carbon throat liner clamped and fixed between the two rotating tubes is rotated. It can be used with external equipment to spray the carbon-carbon throat liner, effectively solving the problems of existing technologies that cannot quickly and conveniently position and clamp the two ends of the throat liner, and cannot adapt to the clamping and fixing of throat liners of different specifications. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a tooling for processing high-density, large-size carbon throat liners proposed in this utility model.

[0023] Figure 2 A front view of the clamping assembly structure of a tooling for processing high-density, large-size carbon throat liners proposed in this utility model;

[0024] Figure 3 A rear view schematic diagram of the clamping assembly structure of a tooling for processing high-density, large-size carbon throat liners proposed in this utility model.

[0025] Figure 4 This is a cross-sectional view of the internal structure of the rotating tube of a tooling for processing high-density, large-size carbon throat liners proposed in this utility model.

[0026] In the diagram: 1. Base; 2. Mounting block; 3. Bidirectional lead screw; 4. First servo motor; 5. First clamping assembly; 6. Second clamping assembly; 7. Moving bracket; 8. Rotating tube; 9. Clamping block; 10. Fixing frame; 11. Second servo motor; 12. Push rod motor; 13. Connecting rod; 14. Slider; 15. Tapered rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Example:

[0029] Reference Figures 1-4A tooling for processing high-density, large-size carbon throat liners includes a base 1. Two bidirectional lead screws 3 are rotatably connected to the inner walls of both ends of the base 1. A first clamping assembly 5 and a second clamping assembly 6 are screwed to the two ends of the rod wall of the bidirectional lead screw 3, respectively. Both the first clamping assembly 5 and the second clamping assembly 6 include a movable bracket 7, a rotating tube 8 rotatably connected to the top of the movable bracket 7, a clamping block 9 sleeved and fixed to one end of the outer wall of the rotating tube 8, a fixing frame 10 welded and fixed to the top of the outer wall of one side of the movable bracket 7, a push rod motor 12 installed and fixed to the inner wall of one side of the fixing frame 10, a connecting rod 13 rotatably connected to the inner rod of the push rod motor 12, and a tapered rod 15 welded and fixed to one end of the connecting rod 13.

[0030] Mounting blocks 2 are welded and fixed to the outer walls of both sides of the base 1. The base 1 is installed and fixed to the external processing equipment through the mounting blocks 2 and bolts. The tooling as a whole is connected and fixed to the external processing equipment through the mounting blocks 2. A first servo motor 4 is installed and fixed to one end of the outer wall of the base 1. The output shaft of the first servo motor 4 is connected and fixed to one end of the bidirectional lead screw 3 through a coupling. The first servo motor 4 drives the bidirectional lead screw 3 to rotate. A screw hole adapted to the bidirectional lead screw 3 is opened at the bottom of one side of the outer wall of the movable bracket 7. The movable bracket 7 and the base 1 form a sliding fit. The rotating bidirectional lead screw 3 drives the screwed movable bracket 7 to move along the length direction of the base 1, thereby adjusting the distance between the two movable brackets 7.

[0031] A second servo motor 11 is fixedly mounted on the top of the outer wall of one side of the movable bracket 7 in the second clamping assembly 6. The output shaft of the second servo motor 11 and the outer wall of the rotating tube 8 are both fitted with meshing gear sets. The second servo motor 11 drives the rotating tube 8 to rotate through the meshing gear sets, thereby rotating the carbon carbon throat liner clamped and fixed between the two rotating tubes 8. The maximum outer diameter of the push rod motor 12 is smaller than the inner diameter of the rotating tube 8. A sliding groove is opened at one end of the top of the inner wall of the rotating tube 8. When the rotating tube 8 rotates, it will not rub against the outer wall of the push rod motor 12. The outer diameter of the connecting rod 13 is adapted to the inner diameter of the rotating tube 8. A slider 14 that forms a sliding fit with the sliding groove is welded to the outer wall of the connecting rod 13. By sliding the slider 14 in the sliding groove, the connecting rod 13 can stably move in and out of the rotating tube 8, and the rotating tube 8 can drive the connecting rod 13 to rotate.

[0032] Working principle:

[0033] During operation, the first servo motor 4 drives the bidirectional lead screw 3 to rotate. The rotating bidirectional lead screw 3 drives the screwed movable bracket 7 to move along the length of the base 1. The distance between the two movable brackets 7 is adjusted so that the rotating tubes 8 and clamping blocks 9 on both sides abut and clamp the two ends of the carbon-carbon throat liner. With the extension of the push rod motor 12, the connecting rod 13 and the tapered rod 15 inside the rotating tube 8 extend outward. The two tapered rods 15 are inserted into the through holes of the carbon-carbon throat liner, which can accurately clamp and position the carbon-carbon throat liner. The second servo motor 11 drives the rotating tube 8 to rotate through the meshing gear set, thereby rotating the carbon-carbon throat liner clamped and fixed between the two rotating tubes 8. It can cooperate with external equipment to perform spraying operations on the carbon-carbon throat liner.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tooling for processing high-density, large-size carbon throat liners, comprising a base (1), characterized in that, The inner walls of both ends of the base (1) are rotatably connected to a bidirectional lead screw (3), and the two ends of the rod wall of the bidirectional lead screw (3) are respectively screwed to a first clamping assembly (5) and a second clamping assembly (6). The first clamping assembly (5) and the second clamping assembly (6) each include a movable bracket (7), a rotating tube (8) rotatably connected to the top of the movable bracket (7), a clamping block (9) sleeved and fixed to one end of the outer wall of the rotating tube (8), a fixing frame (10) welded and fixed to the top of the outer wall of one side of the movable bracket (7), a push rod motor (12) installed and fixed to the inner wall of one side of the fixing frame (10), a connecting rod (13) rotatably connected to the inner rod of the push rod motor (12), and a tapered rod (15) welded and fixed to one end of the connecting rod (13).

2. The tooling for processing high-density, large-size carbon throat liners according to claim 1, characterized in that, Mounting blocks (2) are welded and fixed to the outer walls of both sides of the base (1), and the base (1) is installed and fixed to the external processing equipment by means of mounting blocks (2) and bolts.

3. The tooling for processing high-density, large-size carbon throat liners according to claim 1, characterized in that, The base (1) has a first servo motor (4) fixedly mounted on one end of its outer wall, and the output shaft of the first servo motor (4) is connected and fixed to one end of the bidirectional lead screw (3) through a coupling.

4. The tooling for processing high-density, large-size carbon throat liners according to claim 1, characterized in that, The bottom of one side outer wall of the movable bracket (7) is provided with a screw hole that is compatible with the bidirectional lead screw (3), and the movable bracket (7) and the base (1) form a sliding fit.

5. The tooling for processing high-density, large-size carbon throat liners according to claim 1, characterized in that, The second clamping assembly (6) has a second servo motor (11) fixedly mounted on the top of the outer wall of the movable bracket (7) on one side, and the output shaft of the second servo motor (11) and the outer wall of the rotating tube (8) are both fitted with meshing gear sets.

6. The tooling for processing high-density, large-size carbon throat liners according to claim 1, characterized in that, The maximum outer diameter of the push rod motor (12) is smaller than the inner diameter of the rotating tube (8), and a groove is provided at one end of the top of the inner wall of the rotating tube (8).

7. The tooling for processing high-density, large-size carbon throat liners according to claim 6, characterized in that, The outer diameter of the connecting rod (13) is adapted to the inner diameter of the rotating tube (8), and a slider (14) that forms a sliding fit with the groove is welded and fixed to the outer wall of the connecting rod (13).

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