CN105563272A - Grinding mechanism for heat insulating layer of rocket engine shell - Google Patents

Abstract

The invention discloses a heat insulation layer grinding mechanism of a rocket engine casing, which is characterized in that it comprises a worm gear transmission pair, a cylindrical gear transmission pair, a bevel gear transmission pair, a cylinder, a worm servo motor, a main shaft servo motor and a tool holder. The tool spindle motor realizes the rotary motion of the cutting tool through the transmission shaft and the bevel gear pair, and the worm gear pair realizes the swing of the tool, and then realizes the grinding process on the surface of the shell insulation layer. The invention has the characteristics of high motion flexibility of the grinding tool, large diameter range of the processing shell, capable of processing complex inner surfaces of the shell, and stable and reliable operation of the mechanism. In order to realize the grinding process of the heat insulation layer of the rocket engine shell, an efficient and stable mechanism is provided.

Description

A mechanism for grinding the thermal insulation layer of a rocket engine shell

technical field

The invention relates to the technical field of grinding and processing the inner wall of a shell with complex shapes, in particular to a processing device for grinding the inner wall of a solid rocket motor shell heat insulation layer.

Background technique

The solid rocket motor is an important power equipment in the field of aerospace engineering. The design and manufacture of the thermal insulation layer on the inner wall of the engine shell is very important to the performance and safety of the rocket motor. Due to the particularity of the manufacturing process and application occasions of the engine casing, the heat insulation layer of the inner wall needs to be polished. Due to the irregular curved surface of the heat insulation layer and the high elasticity of the heat insulation layer material, the current heat insulation layer grinding still uses The manual operation method not only has low efficiency, high labor intensity, and harsh working environment, but also makes it difficult to ensure the uniformity of the grinding process, resulting in the scrapping of the engine casing and causing great losses.

Contents of the invention

The object of the present invention is to provide a high-efficiency and high-quality grinding mechanism for the thermal insulation layer of the rocket engine casing.

In order to achieve the above object, the technical solution of the present invention is to provide a mechanism for grinding the heat insulation layer of the rocket engine casing, which is characterized in that it includes:

Tool disk fixed on the tool support frame;

The bracket has a lifting mechanism fixed on the bracket. The lifting mechanism lifts the support frame and the tool disc as a whole through the tool support plate, so that the outer peripheral surface of the tool disc always keeps in contact with the polished surface during the working process. During the working process of the disc, the tool support plate provides upward support for the tool disc;

The tool rotation system connected with the support frame is used to drive the rotation of the tool coil around its central axis at a set speed through the support frame;

The tool swing system is used to drive the bracket and the lifting mechanism on it, the tool support plate, the support frame and the tool disc to swing in a plane perpendicular to the central axis of the tool disc.

Preferably, the bracket, the tool rotating system and the tool swinging system are all fixed on the base plate, and the base plate is driven to move by a transmission device.

Preferably, the lifting mechanism includes an air cylinder, the air cylinder is fixed on the bracket, and the tool support plate is connected with the telescopic end of the air cylinder.

Preferably, the tool rotation system includes a main shaft motor, the main shaft motor is connected with the transmission shaft, the transmission shaft is connected with the torque transmission mechanism through the torque direction change adjustment mechanism, and the torque direction change adjustment mechanism adjusts the transmission shaft on the vertical plane. Rotational motion is transformed into rotational motion in the horizontal plane, and transmitted to torque direction change adjustment mechanism 2 through the torque transmission mechanism, and the torque direction change adjustment mechanism 2 converts the rotational motion in the horizontal plane into the rotation motion in the vertical plane, and then through The support frame drives the rotation of the cutter coil about its central axis at a set rotational speed.

Preferably, the first torque direction adjustment mechanism includes bevel gear pair one and bevel gear pair two connected to the transmission shaft; the second torque direction adjustment mechanism includes bevel gear pair three.

Preferably, the torque transmission mechanism includes a transmission support shaft and a transmission coupling connected to each other, the transmission support shaft is connected to the first torque direction adjustment mechanism, and the transmission coupling is connected to the second torque direction adjustment mechanism. coupling.

Preferably, the support frame forms a positioning support for the transmission shaft and the torque direction change adjustment mechanism.

Preferably, the tool swing system includes a worm motor, which drives a gear mechanism to rotate through a worm gear mechanism, and the gear mechanism drives the bracket to swing in a plane perpendicular to the central axis of the cutter disc.

Preferably, the gear mechanism includes a vertically arranged cylindrical gear 1 driven by the worm gear mechanism, and the cylindrical gear 2 meshes with the cylindrical gear 1. The bracket is coaxially installed with the cylindrical gear 2 and driven by the cylindrical gear 2. Described support swings around the shaft of spur gear two.

Preferably, the worm gear mechanism includes a worm and a worm wheel, the worm motor drives the worm to rotate through a coupling, the worm drives the worm wheel to rotate, and the worm wheel drives the coaxial cylindrical gear to rotate.

Due to the adoption of said technology, compared with the prior art, the present invention has the following advantages and positive effects: the rotation of the "cutting instead of grinding" grinding tool is realized through the rotating mechanism system, and the whole rotating system is composed of a rigid transmission shaft and a gear pair , the mechanism has good stability during the grinding process; the automatic grinding process of different parts of the shell insulation layer is realized through the swing mechanism. automatic grinding.

Description of drawings

Fig. 1 is a kind of overall structural diagram of the polishing mechanism of adiabatic layer of rocket motor casing provided by the present invention;

Fig. 2 is a structural diagram of a rocking system of a rocket engine case heat insulation layer grinding mechanism provided by the present invention;

Fig. 3 is a structural diagram of a grinding tool rotation system in a rocket engine shell heat insulation layer grinding mechanism provided by the present invention;

Fig. 4 is a schematic diagram of a rocket engine casing heat insulation layer grinding mechanism when polishing the straight section of the casing heat insulation layer provided by the present invention;

Fig. 5 is a schematic diagram of a grinding mechanism for the heat insulation layer of a rocket engine shell provided by the present invention when the end curved surface of the shell heat insulation layer is polished.

detailed description

Below in conjunction with specific embodiment, further clarifies the content of the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art may make changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

As shown in FIG. 1 , a mechanism for grinding the heat insulation layer of a rocket motor casing provided by the present invention includes a tool rotation system 10 , a tool swing system 9 and a bottom plate 23 . The tool spindle motor 11 makes the tool rotate at a set speed through the transmission shaft 12 , the bevel gear pair 14 , the bevel gear pair 15 and the bevel gear pair 20 . The positioning of the transmission shaft and the bevel gear pair is guaranteed by the support frame 13. The connection between the tool swing system 9 and the rotation system 10 is realized through a shaft 24 , a connecting plate 25 and a bracket 22 . The cylindrical gear pair 5 transmits the swing through the support 4, and by changing the length of the support 4, the adjustment of the machining inner diameter range can be realized.

As shown in Figure 2, in the swing system of the tool, the worm motor 8 drives the worm 61 to rotate through the coupling 7, the worm 61 drives the worm wheel 62 to rotate, the worm wheel 62 drives the coaxial cylindrical gear 51 to rotate, and the cylindrical gear 51 and the cylindrical gear 52 meshes and drives it to rotate, and the bracket 4 coaxially installed with the cylindrical gear 52 is rotated by the cylindrical gear 52 to realize the swing of the bracket 4, and the swing of the bracket 4 drives the cylinder 19, the transmission coupling 17, the cylinder 18, and the tool support The overall swing of the frame 2, the tool support plate 211 and the tool disc 1.

As shown in FIG. 3 , in the tool rotation system, the rotation of the tool spindle motor 11 is transmitted to the bevel gear pair 14 and the bevel gear pair 15 through the transmission shaft 12 to change the direction of rotation. Through the transmission support shaft 16 and the transmission coupling 17, the rotational motion is transmitted to the bevel gear pair 20, the rotation of the tool disc 1 is realized through the tool support frame 2, and the tool support plate 211 realizes fixed support for the tool disc 1 during rotation. By adjusting the rotational speed of the tool spindle motor 11 and the transmission ratios of the bevel gear pair 14 , the bevel gear pair 15 and the bevel gear pair 20 , the set rotational speed of the cutter head 1 is realized.

As shown in Figure 4, when grinding the straight section of the shell, under the action of the cylinder 18 and the cylinder 19, the cutter disc 1 always keeps in contact with the surface 100 of the straight section, and the entire grinding mechanism moves under the action of the transmission device. Realize automatic grinding processing.

As shown in Figure 5, when grinding the curved surface at the end of the shell, under the action of cylinder 18 and cylinder 19, the tool disc 1 always keeps in contact with the surface 101 of the curved surface at the end, and the entire grinding mechanism is realized under the action of the transmission device. Move to realize automatic grinding process.

The cutter disk 1 used for the grinding process adopts a disc-shaped milling cutter, and adopts the processing method of "replacing grinding by cutting" to improve the grinding efficiency.

Claims (10)

1. a rocket engine cast heat insulation layer workpiece polishing mechanism, is characterized in that, comprising:

Be fixed on the capstan head (1) on cutter bracing frame (2);

Support (4), support (4) is fixed with lifting mechanism, lifting mechanism passes through cutter gripper shoe (211) by bracing frame (2) and capstan head (1) integral lifting, the outer circumference surface of capstan head (1) is remained and the contact being polished face in the course of the work, in capstan head (1) course of work, provide support force upwards by cutter gripper shoe (211) to capstan head (1);

The cutter rotary system (10) be linked with bracing frame (2), for driving capstan head (1) around its central axis with the rotation of setting speed by bracing frame (2);

Cutter oscillation system (9), for driving arm (4) and on lifting mechanism, cutter gripper shoe (211), bracing frame (2) and capstan head (1) swing in the plane of the central axis perpendicular to capstan head (1).

2. a kind of rocket engine cast heat insulation layer workpiece polishing mechanism as claimed in claim 1, it is characterized in that, described support (4), described cutter rotary system (10) and described cutter oscillation system (9) are all fixed on base plate (23), drive base plate (23) mobile by transmission device.

3. a kind of rocket engine cast heat insulation layer workpiece polishing mechanism as claimed in claim 1, it is characterized in that, described lifting mechanism comprises cylinder, and cylinder is fixed on described support (4), and described cutter gripper shoe (211) is linked with the telescopic end of cylinder.

4. a kind of rocket engine cast heat insulation layer workpiece polishing mechanism as claimed in claim 1, it is characterized in that, described cutter rotary system (10) comprises spindle motor (11), spindle motor (11) and power transmission shaft (12) are linked, power transmission shaft (12) is linked via moment break-in guiding mechanism one and torque transmission mechanism, rotary motion in upper for power transmission shaft (12) perpendicular is changed into rotary motion in horizontal plane by moment break-in guiding mechanism, and pass to moment break-in guiding mechanism two via torque transmission mechanism, from moment break-in guiding mechanism two, the rotary motion in horizontal plane is become rotary motion in perpendicular, capstan head (1) is driven around its central axis with the rotation of setting speed again by support frame as described above (2).

5. a kind of rocket engine cast heat insulation layer workpiece polishing mechanism as claimed in claim 4, it is characterized in that, described moment break-in guiding mechanism one comprises the bevel gear pair one (14) and bevel gear pair two (15) that are linked with described power transmission shaft (12); Described moment break-in guiding mechanism two comprises bevel gear pair three (20).

6. a kind of rocket engine cast heat insulation layer workpiece polishing mechanism as claimed in claim 4, it is characterized in that, described torque transmission mechanism comprises the transmission back shaft (16) and transmission shaft coupling (17) that interconnect, transmit back shaft (16) to be linked with described moment break-in guiding mechanism one, transmit shaft coupling (17) and be linked with described moment break-in guiding mechanism two.

7. a kind of rocket engine cast heat insulation layer workpiece polishing mechanism as claimed in claim 4, is characterized in that, forms positioning supports by bracing frame (13) to described power transmission shaft (12) and described moment break-in guiding mechanism one.

8. a kind of rocket engine cast heat insulation layer workpiece polishing mechanism as claimed in claim 1, it is characterized in that, described cutter oscillation system (9) comprises endless screw electric motor (8), endless screw electric motor (8) is rotated by worm-and-wheel gear driven wheel mechanism, and gear mechanism drives described support (4) to swing in the plane of the central axis perpendicular to described capstan head (1).

9. a kind of rocket engine cast heat insulation layer workpiece polishing mechanism as claimed in claim 8, it is characterized in that, described gear mechanism comprises the roller gear one (51) of the vertical layout driven by described worm-and-wheel gear, roller gear two (52) is meshed with roller gear one (51), described support (4) and roller gear two (52) are coaxially installed, and drive described support (4) to swing around the axle of roller gear two (52) by roller gear two (52).

10. a kind of rocket engine cast heat insulation layer workpiece polishing mechanism as claimed in claim 9, it is characterized in that, described worm-and-wheel gear comprises worm screw (61) and worm gear (62), described endless screw electric motor (8) drives worm screw (61) to rotate by shaft coupling (7), worm screw (61) drives worm gear (62) to rotate, and worm gear (62) drives the described roller gear one (51) coaxial with it to rotate.