Large-caliber rocket shell insulation layer automatic polisher

Abstract

The application provides a large-caliber rocket projectile heat insulation layer automatic polishing machine, which comprises a machine tool bed, a walking tail seat, a polishing arm, a polishing mechanism and a machine head, the walking tail seat is movably arranged on the machine tool bed, the polishing arm is arranged along the length direction of the machine tool bed, one end of the polishing arm is connected with the walking tail seat, the polishing mechanism is movably arranged on the polishing arm and can move along the length direction of the polishing arm, the machine head is arranged at one end of the machine tool bed, the machine head comprises a machine head body and a holding mechanism, the holding mechanism is installed on the machine head body and used for holding a rocket engine shell, and the other end of the polishing arm is connected with the holding mechanism. The application realizes mechanized polishing, improves polishing efficiency and polishing quality.

Description

Technical Field

[0001] This invention relates to the field of rocket engine manufacturing equipment technology, specifically to an automatic grinding machine for the insulation layer of large-caliber rockets. Background Technology

[0002] The thermal insulation layer of a solid rocket motor is a non-metallic material bonded to its inner surface during the manufacturing process. It serves to insulate the combustion chamber from excessive heat, preventing the engine casing from overheating and compromising its structural integrity. Often, after vulcanization, the surface energy of the insulation layer is low due to the presence of release agents and weak boundary layers. Therefore, the surface needs to be roughened by grinding to increase its surface energy and improve the adhesion strength between the insulation layer and the liner / propellant.

[0003] Currently, manual polishing is commonly used. Manual polishing can be done by operators holding sandpaper, files, etc., to polish the insulation layer; or it can be done by operators holding sanding machines, polishing machines, etc. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic grinding machine for the insulation layer of large-caliber rockets, which realizes mechanical grinding, improves grinding efficiency, and enhances grinding quality. This equipment can grind the inner surface of the insulation layer of rocket engines of different lengths and diameters, and has a wide range of applications.

[0005] To address the aforementioned problems, this invention provides an automatic grinding machine for the insulation layer of large-caliber rockets. The machine comprises a machine bed, a traveling tailstock, a grinding arm, a grinding mechanism, and a grinding head. The traveling tailstock is movably mounted on the machine bed and can move along the length of the machine bed. The grinding arm is arranged along the length of the machine bed, and one end of the grinding arm is connected to the traveling tailstock. The grinding mechanism is used to grind the inner surface of the insulation layer inside the rocket engine casing. The grinding mechanism is movably mounted on the grinding arm and can move along the length of the grinding arm. The grinding head is located at one end of the machine bed. The grinding head includes a grinding head body and a holding mechanism. The holding mechanism is mounted on the grinding head body and is used to hold the rocket engine casing. The other end of the grinding arm is connected to the holding mechanism.

[0006] The above-mentioned automatic grinding machine for the insulation layer of large-caliber rockets is characterized in that the automatic grinding machine for the insulation layer of large-caliber rockets further includes a grinding support mechanism for supporting the rocket engine casing. The grinding support mechanism is movably mounted on the machine tool bed and can move along the length direction of the machine tool bed.

[0007] The above-mentioned automatic grinding machine for the insulation layer of large-caliber rockets is characterized in that the automatic grinding machine for the insulation layer of large-caliber rockets further includes a clamping and rotating mechanism for limiting the position of the rocket engine casing. One end of the clamping and rotating mechanism is fixedly installed on the grinding support mechanism, and the other end of the clamping and rotating mechanism abuts against the outer wall of the rocket engine casing on the side away from the grinding support mechanism.

[0008] The aforementioned automatic grinding machine for the insulation layer of large-caliber rocket projectiles is characterized in that the traveling tailstock includes a tailstock body, a tailstock traveling mechanism, and a tailstock sliding structure; the tailstock traveling mechanism is fixedly installed on the tailstock body and connected to the machine tool bed, used to drive and control the tailstock body to move along the length direction of the machine tool bed; the tailstock sliding structure is fixedly installed at the bottom of the tailstock body, slidably connected to the machine tool bed, and can move along the length direction of the machine tool bed under the guidance of the machine tool bed.

[0009] The aforementioned automatic grinding machine for the insulation layer of large-caliber rocket projectiles is characterized in that the grinding arm includes a connecting base, a cantilever, and a clamping tip component; the connecting base is connected to the traveling tailstock; the cantilever is connected to the connecting base; the clamping tip component is located at the end of the cantilever near the holding mechanism, and the clamping tip component includes a fixed part, a rotating part, and a rotating connector; the fixed part is detachably fixedly connected to the cantilever; the rotating part is in contact with the holding mechanism; and the rotating part and the fixed part are rotatably connected through the rotating connector.

[0010] The aforementioned automatic grinding machine for the insulation layer of a large-caliber rocket is characterized in that the grinding mechanism includes a grinding mechanism traveling device, a movable arm, a grinding toothed disc, and a grinding toothed disc drive; the grinding mechanism traveling device is movably mounted on the grinding arm; one end of the movable arm is mounted on the grinding mechanism traveling device and can change the angle between the movable arm and the grinding mechanism traveling device, thereby enabling grinding of various parts of the inner surface of the rocket engine insulation layer; the grinding toothed disc is mounted on the other end of the movable arm; the grinding toothed disc drive is connected to the grinding toothed disc and is used to drive the grinding toothed disc to rotate, thereby grinding the inner surface of the rocket engine insulation layer.

[0011] The aforementioned automatic grinding machine for the insulation layer of large-caliber rocket projectiles is characterized in that the grinding support mechanism includes a support mechanism body, a support traveling mechanism, a first support arm connecting seat, a second support arm connecting seat, an adjustment mechanism, a first support arm, and a second support arm; the support mechanism body is movably mounted on the machine tool bed, the length direction of the support mechanism body is perpendicular to the length direction of the machine tool bed, and the support mechanism body can move along the length direction of the machine tool bed; one end of the support traveling mechanism is connected to the support mechanism body, and the other end of the support traveling mechanism is connected to the machine tool bed, for controlling the movement of the support mechanism body along the length direction of the machine tool bed; the first support arm connecting... The first support arm connecting seat is movably mounted on the support mechanism body. The second support arm connecting seat is movably mounted on the support mechanism body and is positioned opposite to the first support arm connecting seat. The second support arm connecting seat is also movable along the length of the support mechanism body. The adjustment mechanism is mounted on the support mechanism body and is used to adjust the positions of the first and second support arm connecting seats on the support mechanism body. One end of the first support arm is connected to the first support arm connecting seat at an adjustable angle. One end of the second support arm is connected to the second support arm connecting seat at an adjustable angle.

[0012] The aforementioned automatic grinding machine for the insulation layer of a large-caliber rocket is characterized in that the pressing and rotating mechanism includes a column, a connecting arm, a rotating mechanism, and a pressure roller mechanism; the lower end of the column is fixed to the grinding support mechanism; one end of the connecting arm is rotatably connected to the column; the rotating mechanism is connected to both the column and the connecting arm, and is used to control the circumferential rotation of the connecting arm around the column; the pressure roller mechanism is installed on the other end of the connecting arm, and is used to press against the outer wall of the rocket engine casing on the side away from the grinding support mechanism.

[0013] The above-mentioned automatic grinding machine for the insulation layer of large-caliber rocket projectiles is characterized in that the machine tool bed includes a bed body, a bed guide rail and a rack, wherein the bed guide rail and the rack are fixedly installed on the bed body along the length direction of the machine tool bed.

[0014] The above-mentioned automatic grinding machine for the insulation layer of a large-caliber rocket is characterized in that the grinding support mechanism further includes a protective bracket, which is fixedly installed on the support mechanism body and located directly below the rocket engine casing to be ground.

[0015] Compared with existing technologies, this invention realizes mechanical equipment grinding instead of manual grinding, resulting in high grinding efficiency. Through the setting of the grinding disc, grinding arm and machine head, the grinding mechanism is more stable during the grinding process, with good grinding uniformity and effective guarantee of grinding quality. At the same time, the traveling tailstock can move along the machine bed, enabling the equipment to perform grinding operations on the inner surface of the insulation layer of rocket engines of different lengths and specifications, making the equipment widely adaptable.

[0016] The invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention.

[0019] Figure 2 for Figure 1 Enlarged view of point A.

[0020] Figure 3 for Figure 1 Enlarged view of point B.

[0021] Figure 4 This is a three-dimensional structural diagram of the traveling tailstock, grinding arm, and grinding mechanism in an embodiment of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the grinding support mechanism and the pressing rotation mechanism in an embodiment of the present invention.

[0023] Figure 6 for Figure 5 Enlarged view of point C.

[0024] Figure 7 This is a three-dimensional structural diagram of the grinding support mechanism in an embodiment of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the grinding mechanism from a first-view perspective in an embodiment of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram of the grinding mechanism from a second perspective in an embodiment of the present invention.

[0027] Figure 10 This is a three-dimensional structural diagram of the pressing tip component in an embodiment of the present invention.

[0028] Figure 11 This is a cross-sectional view of the clamping tip component in an embodiment of the present invention.

[0029] Figure 12 This is an exploded view of the three-dimensional structure of the grinding toothed disc in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1—Machine tool bed; 11—Bed body; 12—Bed guide rail;

[0032] 13—Rack; 2—Traveling tailstock; 21—Tailstock body;

[0033] 22—Tailstock traveling mechanism; 23—Tailstock sliding structure; 3—Grinding arm;

[0034] 31—Connecting base; 32—Cantilever; 321—Grinding mechanism traveling rack;

[0035] 33—Clamping center component; 331—Clamping mechanism gasket; 332—Clamping center body;

[0036] 333—Spring retaining ring; 334—Spring; 335—Sliding retaining ring;

[0037] 336—Bearing; 337—Clamping center cover; 338—Clamping center;

[0038] 34—Grinding mechanism guide rail; 4—Grinding mechanism; 41—Grinding mechanism traveling device;

[0039] 411—Base of the grinding mechanism's traveling device; 412—Drive motor for the grinding mechanism;

[0040] 413—Grinding mechanism reducer; 414—Grinding mechanism travel gear;

[0041] 42—Mountain arm; 421—Mountain arm drive; 422—First movable arm;

[0042] 423—Second movable arm; 424—Pressure control cylinder; 43—Grinding gear disc;

[0043] 44—Grinding gear drive; 5—Machine head; 51—Machine head body;

[0044] 52—Bearing mechanism; 6—Grinding support mechanism; 61—Support mechanism body;

[0045] 611—Guide structure; 612—Scale; 62—Support walking mechanism;

[0046] 621—Drive device for supporting the walking mechanism; 622—Gear for supporting the walking mechanism;

[0047] 63—First support arm connecting seat; 631—Sliding structure; 632—Pin hole;

[0048] 633—Pointer; 64—Second support arm connecting seat; 65—Adjustment mechanism;

[0049] 651—Drive source for adjusting mechanism; 652—First lead screw; 653—Second lead screw;

[0050] 654—Coupling; 66—First support arm; 67—Second support arm;

[0051] 68—Protective support; 7—Pressure rotating mechanism; 71—Column;

[0052] 72—Connecting arm; 73—Rotating mechanism; 731—Rotating motor;

[0053] 732—Gear disc; 74—Pressure roller mechanism; 741—Guide connector;

[0054] 742—Pushing component; 743—Pressure roller seat; 744—Connecting plate;

[0055] 745—Pressure roller; 746—Limiting arc groove; 747—Limiting bolt;

[0056] 75—Locking mechanism; 751—Actuator; 752—Lock hole. Detailed Implementation

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0058] like Figure 1As shown in the figure, this embodiment discloses an automatic grinding machine for the insulation layer of a large-caliber rocket, which includes a machine bed 1, a traveling tailstock 2, a grinding arm 3, a grinding mechanism 4, and a machine head 5. The traveling tailstock 2 is movably mounted on the machine bed 1 and can move along the length direction of the machine bed 1. The grinding arm 3 is arranged along the length direction of the machine bed 1, and one end of the grinding arm 3 is connected to the traveling tailstock 2. The grinding mechanism 4 is used to grind the inner surface of the insulation layer inside the rocket engine casing. The grinding mechanism 4 is movably mounted on the grinding arm 3 and can move along the length direction of the grinding arm 3. The machine head 5 is located at one end of the machine bed 1. The machine head 5 includes a machine head body 51 and a holding mechanism 52. The holding mechanism 52 is mounted on the machine head body 51 and is used to hold the rocket engine casing and drive the rocket engine casing to rotate. The other end of the grinding arm 3 is connected to the holding mechanism 52.

[0059] The automatic grinding machine for the insulation layer of large-caliber rockets in this embodiment realizes mechanical grinding instead of manual grinding, thus improving grinding efficiency. At the same time, the traveling tailstock 2 can move along the machine bed 1, allowing the equipment to perform grinding operations on the inner surface of the insulation layer of rocket engines of different lengths, making the equipment widely adaptable.

[0060] In this embodiment, the traveling tailstock 2 and the headstock 5 are connected via a grinding arm 3. The grinding mechanism 4 enters the rocket engine casing along the grinding arm 3 to grind the inner surface of the insulation layer. This allows the device of the present invention to grind the inner surface of the insulation layer inside rocket engine casings with small diameters and long lengths. It eliminates the need for workers to fix the grinding tool to one end of a cantilever beam and then feed the grinding tool into the rocket engine casing via the cantilever beam. The existing grinding process is time-consuming, labor-intensive, and difficult to control the grinding force. Furthermore, the cantilever beam increases the undesirable vibrations generated by the grinding tool, affecting the grinding quality. In this embodiment, one end of the grinding arm 3 is connected to the headstock 5, and the other end is connected to the traveling tailstock 2, resulting in better stability of the grinding mechanism 4 during the grinding process and higher grinding quality.

[0061] like Figure 1 As shown, the automatic grinding machine for the insulation layer of large-caliber rockets in this embodiment also includes a grinding support mechanism 6 for supporting the rocket engine casing. The grinding support mechanism 6 is movably mounted on the machine tool bed 1 and can move along the length direction of the machine tool bed 1.

[0062] like Figure 1 , Figure 5 and Figure 7As shown, the grinding support mechanism 6 in this embodiment includes a support mechanism body 61, a support traveling mechanism 62, a first support arm connecting seat 63, a second support arm connecting seat 64, an adjustment mechanism 65, a first support arm 66, and a second support arm 67. The support mechanism body 61 is movably mounted on the machine tool bed 1, and the length direction of the support mechanism body 61 is perpendicular to the length direction of the machine tool bed 1. The support mechanism body 61 can move along the length direction of the machine tool bed 1. One end of the support traveling mechanism 62 is connected to the support mechanism body 61, and the other end of the support traveling mechanism 62 is connected to the machine tool bed 1, for controlling the movement of the support mechanism body 61 along the length direction of the machine tool bed 1. The first support arm connecting seat 63 is movably mounted on the support mechanism body 61. The first support arm 63 is movable along the length of the support mechanism body 61; the second support arm connecting seat 64 is movably disposed on the support mechanism body 61, and the second support arm connecting seat 64 is disposed opposite to the first support arm connecting seat 63, and the second support arm connecting seat 64 is movable along the length of the support mechanism body 61; the adjustment mechanism 65 is mounted on the support mechanism body 61 and is used to adjust the positions of the first support arm connecting seat 63 and the second support arm connecting seat 64 on the support mechanism body 61; one end of the first support arm 66 is connected to the first support arm connecting seat 63 at an adjustable connection angle; the other end of the first support arm 66 is connected to the first trolley; one end of the second support arm 67 is connected to the second support arm connecting seat 64 at an adjustable connection angle, and the other end of the second support arm 67 is connected to the second trolley.

[0063] In this embodiment, the support and travel mechanism 62 includes a support and travel mechanism drive device 621 and a support and travel mechanism gear 622. The support and travel mechanism drive device 621 is connected to the support and travel mechanism gear 622 and is used to drive the support and travel mechanism gear 622 to rotate. The support and travel mechanism drive device 621 is mounted on the support mechanism body 61. A first rack 13 that cooperates with the support and travel mechanism gear 622 is mounted on the machine tool bed 1. The cooperation between the gear and the rack enables the grinding support mechanism 6 to move along the length direction of the machine tool bed 1. The support and travel mechanism drive device 621 can be as follows: Figure 5 or Figure 7The drive unit shown is composed of a servo motor and a reducer. The reducer can be a worm gear reducer, with the servo motor connected to the worm of the worm gear reducer. The support walking mechanism gear 622 is connected to the worm wheel reducer's worm. After the grinding support mechanism 6 travels to a predetermined position, the servo motor stops rotating. Due to the self-locking effect of the worm gear, it not only prevents the grinding support mechanism 6 from moving along the length of the machine tool bed 1, but also prevents the grinding support mechanism 6 from transmitting the force of movement along the length of the machine tool bed 1 to the servo motor, protecting the electrical equipment and improving the equipment's service life. The support walking mechanism drive unit 621 can also be replaced by other drive units depending on the environment or requirements. Examples include stepper motors, ordinary motors, ordinary motors with brakes, ordinary motors with reducers, pneumatic or hydraulically driven motors, etc.

[0064] In this embodiment, a guide structure 611 is provided on the support mechanism body 61 along its length. The bottoms of the first support arm connecting seat 63 and the second support arm connecting seat 64 are both provided with sliding structures 631 that cooperate with the guide structure 611 on the support mechanism body 61. The guide structure 611 can be a linear guide rail, and the sliding structure 631 can be a slider bearing that cooperates with the linear guide rail. For stability considerations, there are two sets of linear guide rails, respectively located on the left and right sides of the upper part of the support mechanism body 61. The first support arm connecting seat 63 is provided with four slider bearings, located near the four corners of the bottom plate of the first support arm connecting seat 63, corresponding to the positions of the two sets of linear guide rails on the support mechanism body 61. The bottom of the second support arm connecting seat 64 is also provided with four slider bearings, located near the four corners of the bottom plate of the second support arm connecting seat 64, corresponding to the positions of the two sets of linear guide rails on the support mechanism body 61.

[0065] like Figure 7As shown, the adjustment mechanism 65 in this embodiment includes an adjustment mechanism drive source 651 and an adjustment mechanism drive component. The adjustment mechanism drive source 651 drives the adjustment mechanism drive component, which in turn drives the first support arm connecting seat 63 and the second support arm connecting seat 64 to move along the support mechanism body 61. The adjustment mechanism drive source 651 can be a servo motor, stepper motor, geared motor, or other device capable of providing power. The adjustment mechanism drive component can be a transmission screw, which includes a first screw 652 and a second screw 653. The first screw 652 and the second screw 653 are arranged on the same axis and are connected by a coupling 654. The threads of the first screw 652 and the second screw 653 have opposite directions. Therefore, in this embodiment, the first support arm connecting seat 63 and the second support arm connecting seat 64 can be driven simultaneously by one adjustment mechanism drive source 651, enabling the first support arm connecting seat 63 and the second support arm connecting seat 64 to move closer to or further away from each other. Its structure is simple, its practicality is high, and it saves on equipment manufacturing costs.

[0066] In this embodiment, one end of the first support arm 66 is hinged to the first support arm connecting seat 63 via a pivot. Both the first support arm 66 and the first support arm connecting seat 63 have multiple corresponding pin holes 632 along the circumferential direction of the hinge axis, with each pin hole 632 being equidistantly spaced. The angle between the first support arm 66 and the first support arm connecting seat 63 can be adjusted by regulating the correspondence between the pin holes 632 on the first support arm 66 and the corresponding pin holes 632 on the first support arm connecting seat 63. This allows the equipment to adapt to grinding operations on rocket engines with a larger diameter range, thus enhancing its applicability.

[0067] like Figure 7 As shown, in this embodiment, a scale 612 is provided on the side wall of the support mechanism body 61; the first support arm connecting seat 63 and / or the second support arm connecting seat 64 are provided with pointers 633 corresponding to the scale 612. By using the reading indicated by the pointer 633 on the scale 612, the first support arm connecting seat 63 and the second support arm connecting seat 64 can be quickly moved to the required position according to the diameter of the engine housing. This saves adjustment time and improves grinding efficiency.

[0068] In this embodiment, the support mechanism body 61 is also equipped with mechanical limiters, electronic limiters and other devices to protect the safe operation of the equipment.

[0069] In this embodiment, the grinding support mechanism 6 may also be equipped with a position detection device to determine the positions of the first support arm connecting seat 63 and the second support arm connecting seat 64, such as a photoelectric switch, distance sensor, encoder, etc. Combined with electrical control, automated adjustment of the first support arm connecting seat 63 and the second support arm connecting seat 64 can be achieved.

[0070] In this embodiment, the first support arm connector 63 and the second support arm connector 64 have the same structure, and the first support arm 66 and the second support arm 67 have the same structure. Identical component structures facilitate processing and manufacturing, reducing equipment design and manufacturing costs.

[0071] like Figure 1 As shown, in this embodiment, there are two grinding support mechanisms 6, which are spaced apart and are located on the machine bed 1 between the traveling tailstock 2 and the headstock 5.

[0072] like Figure 1 and Figure 5 As shown in this embodiment, the automatic grinding machine for the insulation layer of the large-caliber rocket also includes a clamping and rotating mechanism 7 for limiting the position of the rocket engine casing. One end of the clamping and rotating mechanism 7 is fixedly installed on the grinding support mechanism 6, and the other end of the clamping and rotating mechanism 7 abuts against the outer wall of the rocket engine casing on the side away from the grinding support mechanism 6.

[0073] like Figure 3 , Figure 5 and Figure 6 As shown, the pressing and rotating mechanism 7 in this embodiment includes a column 71, a connecting arm 72, a rotating mechanism 73, and a pressure roller mechanism 74. The lower end of the column 71 is fixed on the grinding support mechanism 6. One end of the connecting arm 72 is rotatably connected to the column 71. The rotating mechanism 73 is connected to both the column 71 and the connecting arm 72 and is used to control the circumferential rotation of the connecting arm 72 around the column 71. The pressure roller mechanism 74 is installed on the other end of the connecting arm 72 and is used to press against the outer wall of the rocket engine casing on the side away from the grinding support mechanism 6.

[0074] In this embodiment, the lower end of the column 71 is fixed to the support mechanism body 61 by bolts. One end of the connecting arm 72 is fitted onto the top end of the column 71; the rotating mechanism 73 includes a rotating motor 731, a pinion gear, and a gear disk 732. The gear disk 732 is fixed to the upper part of the column 71, the rotating motor 731 is fixedly installed at the end of the connecting arm 72 near the end of the column 71, and the pinion gear is installed on the output shaft of the rotating motor 731, meshing with the gear disk 732.

[0075] like Figure 5 and Figure 6As shown, in this embodiment, the pressing and rotating mechanism 7 further includes a locking mechanism 75. The locking mechanism 75 includes an actuating part 751 and a locking hole 752. The actuating part 751 is fixedly installed on the upper part of the column 71. The locking hole 752 is located at the bottom of the connecting arm 72 near the end of the column 71. The actuating part 751 includes a driving member and a locking tongue. When the connecting arm 72 is above the actuating part 751, the driving member can push the locking tongue so that one end of the locking tongue is inserted into the locking hole 752, thereby restricting the connecting arm 72 from rotating circumferentially along the column 71.

[0076] In this embodiment, the driving component may be a compressed air-driven cylinder, a hydraulically driven oil cylinder, or a linear motor, etc.

[0077] In this embodiment, the pressure roller mechanism 74 includes a pressure roller assembly, a guide connector 741, and a pusher 742. One end of the guide connector 741 is fixed to the connecting arm 72, and the other end of the guide connector 741 is connected to the pressure roller assembly. The pusher 742 includes a fixing part and a pushing part. The fixing part is fixedly installed on the connecting arm 72, and the pushing part is connected to the pressure roller assembly and is used to drive the pressure roller assembly to move in a predetermined direction under the guidance of the guide connector 741.

[0078] In this embodiment, the guide connector 741 includes a pressure roller guide rail and a pressure roller guide rail bearing. The pressure roller guide rail bearing is fixedly mounted on the connecting arm 72, and the pressure roller guide rail and the pressure roller guide rail bearing cooperate with each other. The pressure roller assembly is connected to one end of the pressure roller guide rail. The pressure roller guide rail can be a cylindrical guide rail, and the pressure roller guide rail bearing is a cylindrical guide rail bearing. For better guidance and stability, multiple guide connectors 741 can be provided, and the multiple guide connectors 741 are evenly distributed along the circumference of the pusher 742.

[0079] In this embodiment, there are two guide connectors 741, which are respectively arranged on the left and right sides of the pusher 742.

[0080] In this embodiment, the pusher 742 is a cylinder. The cylinder body is fixedly mounted on the connecting arm 72, and the piston rod of the cylinder is connected to the pressure roller assembly, which drives the pressure roller assembly to move in a predetermined direction under the guidance of the guide connector 741. Using a cylinder as the pusher 742 not only provides the power for extension and retraction, but also allows control of the force applied to the rocket engine casing by the pressure roller assembly by controlling the air pressure, thus protecting the rocket engine casing from damage while achieving compression. For irregular or deformed rocket engine casings, the cylinder's extensibility can also provide a buffering protection.

[0081] like Figure 6As shown, the pressure roller assembly in this embodiment includes a pressure roller seat 743, a connecting plate 744, and pressure rollers 745. The connecting plate 744 has a structure similar to an isosceles triangle, with its apex hinged to the pressure roller seat 743 via a pin. A pressure roller 745 is installed at each of the other two corners. The connecting plate 744 has a limiting arc groove 746 along its circumferential axis of hinge with the pressure roller seat 743. The pressure roller assembly also includes a limiting bolt 747, which passes through the limiting arc groove 746 and is fixedly connected to the pressure roller seat 743 to limit the angle at which the connecting plate 744 can rotate along the hinge axis.

[0082] like Figure 2 As shown, in this embodiment, the traveling tailstock 2 includes a tailstock body 21, a tailstock traveling mechanism 22, and a tailstock sliding structure 23. The tailstock traveling mechanism 22 is fixedly installed on the tailstock body 21 and is connected to the machine tool bed 1, and is used to drive and control the tailstock body 21 to move along the length direction of the machine tool bed 1. The tailstock sliding structure 23 is fixedly installed at the bottom of the tailstock body 21 and is slidably connected to the machine tool bed 1, and can move along the length direction of the machine tool bed 1 under the guidance of the machine tool bed 1.

[0083] The tailstock walking mechanism 22 described in this embodiment can have the same or similar structure as the support walking mechanism 62 described above.

[0084] In this embodiment, the tailstock sliding structure 23 can be a slider bearing that cooperates with the guide rail.

[0085] like Figures 1 to 3 As shown, the machine tool bed 1 in this embodiment includes a bed body 11, a bed guide rail 12, and a rack 13. The bed guide rail 12 and rack 13 are both fixedly installed on the bed body 11 along the length of the machine tool bed 1. The teeth of the rack 13 face horizontally. This arrangement prevents debris from falling into the tooth gaps and affecting transmission. With the teeth facing horizontally, debris falls directly below the rack under its own weight, rather than getting stuck between the teeth. By installing sweeping plates on the traveling tailstock 2 and the grinding support mechanism 6, debris is cleaned during their movement, ensuring the equipment's long-term and normal operation. The same method can also be applied between the first support arm connecting seat 63 and the support mechanism body 61, and between the second support arm connecting seat 64 and the support mechanism body 61, achieving the same effect.

[0086] like Figure 1 , Figure 4 , Figure 10 and Figure 11As shown, in this embodiment, the grinding arm 3 includes a connecting base 31, a cantilever 32, and a clamping tip component 33. The connecting base 31 is connected to the traveling tailstock 2; the cantilever 32 is connected to the connecting base 31; the clamping tip component 33 is located at the end of the cantilever 32 near the holding mechanism 52. The clamping tip component 33 includes a fixed part, a rotating part, and a rotating connector. The fixed part is detachably fixed to the cantilever 32, the rotating part is in contact with the holding mechanism 52, and the rotating part is rotatably connected to the fixed part through the rotating connector. Since the holding mechanism 52 drives the rocket engine casing to rotate during the grinding process, while the grinding arm 3 used to fix the grinding mechanism 4 does not rotate, the fixed part and the rotating part can separate the rotation of the holding mechanism 52 from the non-rotation of the grinding arm 3, thereby providing a stable support for the grinding mechanism 4.

[0087] In this embodiment, the fixing part includes a clamping mechanism pad 331, a clamping tip body 332, a spring retaining ring 333, a spring 334, and a sliding retaining ring 335; the rotating part includes a clamping tip cover 337 and a clamping tip 338; the rotating connecting component is a bearing 336; one end of the clamping mechanism pad 331 is detachably and fixedly connected to the cantilever 32, and the other end of the clamping mechanism pad 331 is detachably and fixedly connected to one end of the clamping tip body 332; the clamping tip 338 is rotatably mounted on the other end of the clamping tip body 332 along the axis; the spring retaining ring 333... The spring 334 is fitted onto the pressing head body 332, and the spring retaining ring 333 is fixedly connected to the pressing head body 332. The spring 334 is fitted onto the pressing head body 332, and one end of the spring 334 abuts against the spring retaining ring 333. The sliding retaining ring 335 is fitted onto the pressing head body 332, and one side of the sliding retaining ring 335 abuts against the other end of the spring 334. The bearing 336 is fitted onto the pressing head body 332, and the bearing 336 abuts against the other side of the sliding retaining ring 335. The pressing head cover 337 is mounted on the bearing 336.

[0088] like Figure 1 , Figure 8 and Figure 9As shown, the grinding mechanism 4 in this embodiment includes a grinding mechanism traveling device 41, a movable arm 42, a grinding toothed disc 43, and a grinding toothed disc drive 44. The grinding mechanism traveling device 41 is movably mounted on the grinding arm 3. One end of the movable arm 42 is mounted on the grinding mechanism traveling device 41 and can change the angle between the movable arm 42 and the grinding mechanism traveling device 41, thereby enabling grinding of various parts of the inner surface of the rocket engine insulation layer. The grinding toothed disc 43 is mounted on the other end of the movable arm 43. The grinding toothed disc drive 44 is connected to the grinding toothed disc 43 and is used to drive the grinding toothed disc 43 to rotate, thereby grinding the inner surface of the rocket engine insulation layer.

[0089] In this embodiment, the grinding mechanism walking device 41 includes a grinding mechanism walking device base 411 and a grinding mechanism walking device drive; the grinding mechanism walking device drive is installed on the grinding mechanism walking device base 411; the grinding mechanism walking device drive is connected to the grinding arm 3 and is used to control the grinding mechanism walking device base 411 to move along the length direction of the grinding arm 3.

[0090] The grinding mechanism's traveling device includes a grinding mechanism drive motor 412, a grinding mechanism reducer 413, and a grinding mechanism traveling gear 414. The grinding mechanism drive motor 412 is connected to the grinding mechanism reducer 413 to transmit power to the reducer 413. The grinding mechanism traveling gear 414 is mounted on the output shaft of the reducer 413. The grinding arm 3 has a grinding mechanism traveling rack 321 along its length that meshes with the grinding mechanism traveling gear 414. The grinding arm 3 is also provided with a grinding mechanism guide rail 34 along its length direction. The bottom of the grinding mechanism walking device base 411 is provided with a slider bearing that cooperates with the grinding mechanism guide rail 34. Through the cooperation of the slider bearing and the grinding mechanism guide rail, the grinding mechanism walking device base 411 is movably mounted on the grinding arm 3. Through the cooperation of the grinding mechanism walking gear 414 and the grinding mechanism walking rack 321, the grinding mechanism walking device drive can control the grinding mechanism walking device base 411 to move along the length direction of the grinding arm 3.

[0091] The grinding mechanism drive motor 412 can be a servo motor, stepper motor, ordinary motor, pneumatic motor, or other power-providing device. The grinding mechanism reducer 413 can be a worm gear reducer. Worm gear reducers have a large reduction ratio and can achieve self-locking, preventing impacts during operation from being transmitted to the drive motor, effectively protecting the control and electrical equipment, and improving the service life of the equipment.

[0092] like Figure 8 and Figure 9As shown, in this embodiment, the movable arm 42 includes a movable arm drive 421, a first movable arm 422, a second movable arm 423, and a pressure control cylinder 424. The movable arm drive 421 is mounted on the base 411 of the grinding mechanism's walking device. One end of the first movable arm 422 is connected to the movable arm drive 421 and can change the angle between itself and the base 411 of the grinding mechanism's walking device under the drive of the movable arm drive 421. One end of the second movable arm 423 is hinged to the other end of the first movable arm 422. One end of the pressure control cylinder 424 is fixedly connected to the first movable arm 422, and the other end of the pressure control cylinder 424 is connected to the second movable arm 423. The pressure control cylinder 424 can control and drive the second movable arm 423 to rotate around its hinge axis with the first movable arm 422.

[0093] In this embodiment, the grinding gear drive 44 includes a grinding gear drive device, a flexible transmission shaft, and a reversing structure. The grinding gear drive device is fixedly mounted on the base 411 of the grinding mechanism's traveling device. The grinding gear drive device provides power and can be an electrically driven servo motor, a regular motor, or a compressed air driven motor. Depending on the required speed and torque, a reducer can be added after the servo motor or regular motor to adjust the appropriate speed and torque.

[0094] One end of the flexible drive shaft is connected to the grinding gear disk drive device, and the other end of the flexible drive shaft is connected to the reversing structure. The torque generated by the grinding gear disk drive device is transmitted to the reversing structure through the flexible drive shaft. After the reversing structure reverses the direction of the transmitted torque, it is transmitted to the grinding gear disk 43 through its output end.

[0095] In this embodiment, the input and output ends of the reversing structure are perpendicular, and the reversal is achieved by two meshing bevel gears inside.

[0096] like Figure 12 As shown, in this embodiment, the grinding disc 43 includes a first outer disc, a second outer disc, a first toothed disc, and a second toothed disc. The first outer disc, the first toothed disc, the second toothed disc, and the second outer disc are detachably installed together in sequence, and the first outer disc, the second outer disc, the first toothed disc, and the second toothed disc of different sizes can be replaced according to the grinding needs.

[0097] In this embodiment, the first outer disk and the second outer disk have identical structures and are symmetrically arranged on the outer sides of the first toothed disk and the second toothed disk. The first toothed disk and the second toothed disk have the same structure and are symmetrically arranged with respect to their contact surfaces. The components have the same structure, resulting in low processing and design costs. Both the first toothed disk and the second toothed disk use tip-inclined teeth with the tooth tips tilted to one side, and the tips of the teeth on the first toothed disk and the second toothed disk are tilted away from the contact surface. The use of double-row toothed disks results in dense grinding texture, significant grinding effect, and short grinding time. The tooth tip diameter of the first toothed disk and the second toothed disk is larger than the outermost diameter of the first outer disk and the second outer disk. The difference between the tooth tip diameter and the outermost diameter can be adjusted by replacing different first outer disks, second outer disks, first toothed disks, and second toothed disks. By adjusting this difference, the depth of the grinding texture can be changed to adapt to different grinding requirements, making the equipment widely applicable.

[0098] In this embodiment, the clamping mechanism 52 includes a clamping mechanism drive and a clamping mechanism body for driving the clamping mechanism 52 to rotate. The clamping mechanism body can adopt a structure similar to a three-jaw chuck. The rotation center of the three-jaw chuck structure is provided with a hole that cooperates with the clamping tip component 33. The front end of the hole is tapered to facilitate guiding the clamping tip component 33 into the hole.

[0099] like Figure 5 As shown, in this embodiment, the grinding support mechanism 6 further includes a protective bracket 68, which is fixedly installed on the support mechanism body 61 and located directly below the rocket engine casing to be ground. This provides protection and support.

[0100] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic grinding machine for the insulation layer of large-caliber rockets, characterized in that, include: Machine tool bed (1); The traveling tailstock (2) is movably mounted on the machine tool bed (1) and can move along the length of the machine tool bed (1). Grinding arm (3), the grinding arm (3) is arranged along the length direction of the machine tool bed (1), and one end of the grinding arm (3) is connected to the traveling tailstock (2); Grinding mechanism (4), the grinding mechanism (4) is used to grind the inner surface of the inner heat insulation layer of the rocket engine casing. The grinding mechanism (4) is movably arranged on the grinding arm (3). The grinding mechanism (4) can move along the length direction of the grinding arm (3). The machine head (5) is located at one end of the machine bed (1); the machine head (5) includes a machine head body (51) and a clamping mechanism (52), the clamping mechanism (52) is mounted on the machine head body (51) and is used to clamp the rocket engine casing, and the other end of the grinding arm (3) is connected to the clamping mechanism (52). The grinding arm (3) includes: Connecting base (31), the connecting base (31) is connected to the walking tailstock (2); A cantilever (32) is connected to a connecting base (31); The clamping tip component (33) is located at the end of the cantilever (32) near the clamping mechanism (52). The clamping tip component (33) includes a fixed part, a rotating part and a rotating connector. The fixed part is detachably fixedly connected to the cantilever (32). The rotating part is in contact with the clamping mechanism (52). The rotating part and the fixed part are rotatably connected through the rotating connector.

2. The automatic grinding machine for the insulation layer of a large-caliber rocket as described in claim 1, characterized in that, The automatic grinding machine for the insulation layer of large-caliber rockets also includes a grinding support mechanism (6) for supporting the rocket engine casing. The grinding support mechanism (6) is movably mounted on the machine bed (1) and can move along the length of the machine bed (1).

3. The automatic grinding machine for the insulation layer of a large-caliber rocket as described in claim 2, characterized in that, The automatic grinding machine for the insulation layer of the large-caliber rocket also includes a clamping and rotating mechanism (7) for limiting the position of the rocket engine casing. One end of the clamping and rotating mechanism (7) is fixedly installed on the grinding support mechanism (6), and the other end of the clamping and rotating mechanism (7) abuts against the outer wall of the rocket engine casing on the side away from the grinding support mechanism (6).

4. The automatic grinding machine for the insulation layer of a large-caliber rocket as described in claim 1, characterized in that, The walking tailstock (2) includes: Tailstock body (21); Tailstock traveling mechanism (22), which is fixedly installed on the tailstock body (21) and connected to the machine tool bed (1), is used to drive and control the tailstock body (21) to move along the length direction of the machine tool bed (1); The tailstock sliding structure (23) is fixedly installed at the bottom of the tailstock body (21). The tailstock sliding structure (23) is slidably connected to the machine tool bed (1) and can move along the length direction of the machine tool bed (1) under the guidance of the machine tool bed (1).

5. An automatic grinding machine for the insulation layer of a large-caliber rocket as described in claim 1, characterized in that, The polishing mechanism (4) includes: A grinding mechanism traveling device (41) is movably mounted on the grinding arm (3); Movable arm (42), one end of which is mounted on the grinding mechanism walking device (41) and can change the angle between the movable arm (42) and the grinding mechanism walking device (41) so as to grind various parts of the inner surface of the rocket engine insulation layer. A grinding toothed disc (43) is mounted on the other end of the movable arm (42); The grinding toothed disk drive (44) is connected to the grinding toothed disk (43) and is used to drive the grinding toothed disk (43) to rotate, thereby grinding the inner surface of the rocket engine insulation layer.

6. An automatic grinding machine for the insulation layer of a large-caliber rocket as described in claim 3, characterized in that, The grinding support mechanism (6) includes: The support mechanism body (61) is movably mounted on the machine tool bed (1). The length direction of the support mechanism body (61) is perpendicular to the length direction of the machine tool bed (1). The support mechanism body (61) can move along the length direction of the machine tool bed (1). A support walking mechanism (62) is provided, one end of which is connected to the support mechanism body (61) and the other end of which is connected to the machine tool bed (1), for controlling the support mechanism body (61) to move along the length direction of the machine tool bed (1); First support arm connecting seat (63), the first support arm connecting seat (63) is movably disposed on the support mechanism body (61), and the first support arm connecting seat (63) can move along the length direction of the support mechanism body (61); The second support arm connecting seat (64) is movably disposed on the support mechanism body (61), and the second support arm connecting seat (64) is disposed opposite to the first support arm connecting seat (63). The second support arm connecting seat (64) can move along the length direction of the support mechanism body (61). Adjustment mechanism (65) is installed on the support mechanism body (61) and is used to adjust the position of the first support arm connecting seat (63) and the second support arm connecting seat (64) on the support mechanism body (61); The first support arm (66) has one end connected to the first support arm connecting seat (63) at an adjustable angle. And a second support arm (67), one end of which is connected to the second support arm connecting seat (64) at an adjustable angle.

7. An automatic grinding machine for the insulation layer of a large-caliber rocket as described in claim 6, characterized in that, The pressing and rotating mechanism (7) includes: The lower end of the column (71) is fixed to the grinding support mechanism (6); A connecting arm (72), one end of which is rotatably connected to a column (71); A rotating mechanism (73) is connected to the column (71) and the connecting arm (72) respectively, and is used to control the circumferential rotation of the connecting arm (72) around the column (71); The pressure wheel mechanism (74) is mounted on the other end of the connecting arm (72) and is used to press against the outer wall of the rocket engine housing on the side away from the grinding support mechanism (6).

8. An automatic grinding machine for the insulation layer of a large-caliber rocket as described in claim 6, characterized in that, The machine tool bed (1) includes a bed body (11), a bed guide rail (12) and a rack (13). The bed guide rail (12) and the rack (13) are both fixedly installed on the bed body (11) along the length direction of the machine tool bed (1).

9. An automatic grinding machine for the insulation layer of a large-caliber rocket as described in claim 6, characterized in that, The grinding support mechanism (6) also includes a protective bracket (68), which is fixedly installed on the support mechanism body (61) and located directly below the rocket engine casing to be ground.

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