Automatic grinding machine for heat insulation layer of medium-caliber rocket projectile

Abstract

The utility model provides an automatic grinding machine for a heat insulation layer of a medium-caliber rocket projectile. The automatic grinding machine comprises a grinding lathe bed, a grinding machine head, a movable center frame and a grinding device. The grinding machine head comprises a clamping part and a driving part, and the driving part is connected with the clamping part and used for driving the solid rocket engine shell to rotate through the clamping part; the movable center frame comprises a carrier roller part and a movable part, and the carrier roller part is used for supporting a solid rocket engine shell; the grinding device is used for grinding the inner surface of the heat insulation layer of the solid rocket engine and comprises a sliding seat, a connecting rod and a grinding head, the sliding seat is installed on the grinding machine body and can move in the length direction of the grinding machine body, one end of the connecting rod is connected with the sliding seat, and the other end of the connecting rod is connected with the grinding head. The inner surface of the heat insulation layer of the rocket engine with medium and small diameter specifications can be polished, mechanical polishing is achieved, the polishing efficiency is improved, and the polishing quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rocket engine manufacturing equipment, in particular to an automatic grinding machine for the thermal insulation layer of a medium-caliber rocket. Background Art

[0002] Solid rocket engines are mainly composed of solid rocket propellant charge, combustion chamber, nozzle and ignition device. Compared with liquid rocket engines, solid rocket engines have the advantages of simple and compact structure, easy use and short launch preparation time. They are widely used in medium and small rockets. However, the insulation layer of solid rocket engines is a layer of non-metallic material pasted on the inner surface of solid rocket engines during the production process, which is used to block the temperature of the combustion chamber and prevent the temperature of the engine casing from being too high, endangering the structural integrity of the casing. Often after the engine insulation layer is vulcanized, due to the presence of release agents and weak boundary layers on the surface, its surface energy is low. It is necessary to grind the surface of the insulation layer to make the surface rough and increase the surface energy, thereby improving the bonding strength of the bonding interface between the insulation layer and the liner and propellant. At present, manual grinding is often used in the existing technology. For medium and small rockets, due to the limitation of the size of the engine casing, manual grinding is difficult, the grinding quality is not high, and the grinding efficiency is low. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide an automatic grinding machine for the thermal insulation layer of a medium-caliber rocket, which realizes mechanical grinding, improves grinding efficiency, and enhances grinding quality. The equipment can perform grinding operations on the inner surface of the thermal insulation layer of a rocket engine with medium and small diameter specifications, and the equipment has a wide range of applications.

[0004] In order to solve the above problems, the utility model provides an automatic grinding machine for the thermal insulation layer of a medium-caliber rocket, which is characterized by comprising a grinding bed, a grinding machine head, a movable center frame and a grinding device;

[0005] The grinding head is fixedly mounted on the upper part of one end of the grinding bed, and the grinding head includes a holding part and a driving part, the holding part is used to hold the solid rocket engine casing, and the driving part is connected to the holding part and is used to drive the solid rocket engine casing to rotate through the holding part;

[0006] The mobile center frame is arranged on the grinding bed, and the mobile center frame includes a roller part and a moving part, the roller part is used to support the solid rocket engine shell, the roller part is arranged on the moving part, and the moving part is installed above the grinding bed and can move along the length direction of the grinding bed to adjust the position of the moving part on the grinding bed;

[0007] The grinding device is used to grind the inner surface of the insulation layer of a solid rocket engine. The grinding device includes a sliding seat, a connecting rod and a grinding head. The sliding seat is installed on a grinding bed and can move along the length direction of the grinding bed. One end of the connecting rod is connected to the sliding seat, and the other end of the connecting rod is connected to the grinding head.

[0008] The above-mentioned automatic grinding machine for the insulation layer of a medium-caliber rocket is characterized in that the grinding bed includes a bed body, a first guide rail, a second guide rail and a grinding bed rack, the first guide rail, the second guide rail and the grinding bed rack are all fixedly arranged on the bed body along the length direction of the bed body, the first guide rail and the second guide rail are arranged at intervals, and the grinding bed rack is arranged between the first guide rail and the second guide rail.

[0009] The above-mentioned automatic grinder for the insulation layer of a medium-caliber rocket is characterized in that the grinding head also includes a grinding head body and a protective cover, the grinding head body is fixedly mounted on the upper part of one end of the grinding bed, the supporting part, the driving part and the protective cover are all mounted on the grinding head body, the protective cover is located on the outside of the supporting part, an observation port is opened on the protective cover, and a protective glass is installed on the observation port.

[0010] The above-mentioned automatic grinding machine for the insulation layer of a medium-caliber rocket is characterized in that the moving part includes a roller seat moving part body, a slider bearing, a roller seat driving device and a gear, the slider bearing is fixedly mounted on the bottom of the roller seat moving part body, the roller seat driving device is fixedly mounted on the roller seat moving part body, the output end of the roller seat driving device is connected to the gear, and the gear is meshed with the rack of the grinding bed.

[0011] The above-mentioned automatic grinding machine for the insulation layer of a medium-caliber rocket is characterized in that the roller part includes a roller, a roller mounting rod, a transmission gear set, a roller adjustment nut, a roller adjustment screw and a roller adjustment drive device, the roller is rotatably installed on the top of one end of the roller mounting rod, the roller mounting rod is provided with a roller mounting rod rack, the roller mounting rod rack is arranged along the length direction of the roller mounting rod, one end of the transmission gear set is meshed with the roller mounting rod rack, the roller adjustment screw can be rotatably installed on the moving part along the axis, the roller adjustment drive device is installed on the moving part, the output end of the roller adjustment drive device is connected with the roller adjustment screw for driving the roller adjustment screw to rotate, the roller adjustment screw is threadedly connected with the roller adjustment nut, and the roller adjustment screw can drive the roller adjustment nut to move along the length direction of the roller adjustment screw, the roller adjustment nut is provided with a roller adjustment nut rack, and the roller adjustment nut rack is meshed with the other end of the transmission gear set.

[0012] The above-mentioned automatic grinding machine for the insulation layer of a medium-caliber rocket is characterized in that the number of the movable center frame is at least one.

[0013] The above-mentioned automatic grinding machine for the thermal insulation layer of a medium-caliber rocket is characterized in that the automatic grinding machine for the thermal insulation layer of a medium-caliber rocket further comprises a clamping device, and the clamping device is fixedly mounted on the main body of the moving part of the roller seat;

[0014] The clamping device includes a base, a rotating part, a bracket and a clamping part. The base is fixedly mounted on the main body of the roller seat moving part, one end of the bracket is rotatably mounted on the base, one end of the rotating part is connected to the bracket, and the other end of the rotating part is connected to the base, and is used to drive the bracket to rotate relative to the base. The clamping part is mounted on the other end of the bracket. When the bracket drives the clamping part to rotate above the solid rocket engine casing, the clamping part limits the position of the solid rocket engine casing through the pressure wheel.

[0015] The above-mentioned automatic grinding machine for the thermal insulation layer of a medium-caliber rocket is characterized in that the rotating part includes a rotating large gear, a rotating small gear and a rotating drive, the rotating large gear is fixedly mounted on the base, the rotating drive is fixedly mounted on the bracket, the rotating small gear is mounted on the output shaft of the rotating drive, the rotating small gear is meshed with the rotating large gear, and the bracket is driven to rotate relative to the base through the relative movement of the rotating small gear and the rotating large gear;

[0016] The clamping part includes a pressing wheel, a pressing wheel bracket, a pressing wheel adjustment drive and a pressing wheel push rod. The pressing wheel adjustment drive is installed at the other end of the bracket. The pressing wheel adjustment drive is connected to one end of the pressing wheel push rod and is used to drive the pressing wheel push rod to move. The other end of the pressing wheel push rod is hinged to the pressing wheel bracket. There are two pressing wheels, which are arranged at the left and right ends of the pressing wheel bracket at intervals.

[0017] The above-mentioned automatic grinder for the insulation layer of a medium-caliber rocket is characterized in that the clamping device also includes a locking part, which is installed on the base. The locking part includes a locking drive and a locking tongue, and the locking drive is installed on the base. The locking drive is connected to the locking tongue and is used to drive the locking tongue to move, and the bracket begins to have a locking hole corresponding to the locking tongue.

[0018] The above-mentioned automatic grinder for the insulation layer of a medium-caliber rocket is characterized in that the grinding head includes a first grinding extension arm, a second grinding extension arm, a grinding tool, an elastic member, an adjusting slider, an adjusting slider drive and a grinding head base, one end of the first grinding extension arm and one end of the second grinding extension arm are both hinged on the grinding head base, and the first grinding extension arm is symmetrically arranged at intervals, the number of the grinding tools is two groups, which are respectively arranged on the other end of the first grinding extension arm and the other end of the second grinding extension arm, one end of the elastic member is connected to the middle part of the first grinding extension arm, and the other end of the elastic member is connected to the middle part of the second grinding extension arm, the adjusting slider is arranged between the first grinding extension arm and the second grinding extension arm, and the first grinding extension arm and the second grinding extension arm are both provided with a sliding inclined surface on one side close to the adjusting slider, the adjusting slider is in conflict with the sliding inclined surface, the adjusting slider drive is connected to the adjusting slider, and is used to drive the adjusting slider to move, and the first grinding extension arm and the second grinding extension arm are pushed outward by the conflict between the adjusting slider and the sliding inclined surface.

[0019] The above-mentioned automatic grinding machine for the insulation layer of a medium-caliber rocket is characterized in that the sliding seat includes a sliding seat body, a sliding seat drive, a sliding seat moving gear and a sliding seat slider bearing, the sliding seat slider bearing is fixedly installed at the bottom of the sliding seat body, and the sliding seat slider bearing is matched with the first guide rail and the second guide rail, the sliding seat drive is installed on the sliding seat body, the sliding seat moving gear is connected to the output end of the sliding seat drive, and the sliding seat moving gear is meshed with the rack of the grinding bed.

[0020] Compared with the prior art, the utility model realizes that mechanical equipment grinding replaces manual grinding, and the grinding efficiency is high; the grinding head has a simple structure and a small size, and can be used to grind the insulation layer inside the casing of a medium-sized or small engine; with automatic control, it can realize rapid grinding of casings of engines of different specifications, and the equipment has a wide range of adaptability.

[0021] The utility model is further described in detail below through the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure from the first perspective of a partial structure of the grinding head in an embodiment of the utility model.

[0025] Figure 3 It is a schematic diagram of the third perspective structure of a part of the grinding machine head in an embodiment of the utility model.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure from a first viewing angle of a partial structure of the mobile center frame in an embodiment of the utility model.

[0027] Figure 5 It is a schematic diagram of the third perspective structure of a part of the movable center frame in the embodiment of the utility model.

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the mobile center frame and the clamping device from the first perspective in the embodiment of the utility model.

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the mobile center frame and the clamping device from a second viewing angle in an embodiment of the utility model.

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the grinding device in the embodiment of the utility model.

[0031] Fig. 9 It is a schematic diagram of the three-dimensional structure of the grinding head in the embodiment of the utility model.

[0032] Description of reference numerals:

[0033] 1—grinding bed; 11—bed body; 12—first guide rail;

[0034] 13—second guide rail; 14—grinding bed rack; 2—grinding machine head;

[0035] 21 - supporting part; 22 - driving part; 23 - grinding machine head body;

[0036] 24—protective cover; 241—observation port; 3—mobile center stand;

[0037] 31 - roller part; 311 - roller; 312 - roller mounting rod;

[0038] 313—transmission gear set; 314—roller adjustment screw nut; 315—roller adjustment screw;

[0039] 316 - roller adjustment drive device; 317 - roller mounting rod rack;

[0040] 318—roller adjustment screw nut rack; 32—moving part; 321—roller seat moving part body;

[0041] 322—slider bearing; 323—roller seat driving device; 324—gear;

[0042] 4—grinding device; 41—sliding seat; 411—sliding seat body;

[0043] 412—sliding seat drive; 413—sliding seat moving gear;

[0044] 414—sliding seat slider bearing; 42—connecting rod; 43—grinding head;

[0045] 431 - first grinding extension arm; 432 - second grinding extension arm; 433 - grinding tool;

[0046] 434—elastic member; 435—adjusting slider; 436—adjusting slider drive;

[0047] 437—grinding head base; 5—clamping device; 51—base;

[0048] 52—rotating part; 521—rotating gear; 523—rotating drive;

[0049] 53—bracket; 54—pressing portion; 542—pressing wheel bracket;

[0050] 543—pressure wheel adjustment drive; 544—pressure wheel push rod; 55—locking part;

[0051] 551 - locking drive; 552 - locking tongue. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0053] like Figure 1As shown, this embodiment discloses an automatic grinding machine for the thermal insulation layer of a medium-caliber rocket, which includes: a grinding bed 1, a grinding head 2, a mobile center frame 3 and a grinding device 4; the grinding bed 1 is used as the main structure of the equipment for installing the grinding head 2, the mobile center frame 3 and the grinding device 4; the grinding head 2 is fixedly installed on the upper part of one end of the grinding bed 1, and the grinding head 2 includes a supporting part 21 and a driving part 22, the supporting part 21 is used to support the solid rocket engine casing, the driving part 22 is connected to the supporting part 21, and is used to drive the solid rocket engine casing to rotate through the supporting part 21; the mobile center frame 3 is arranged on the grinding bed 1, and the mobile center frame 3 includes a roller part 31 and a moving part 32, the roller part 31 is used to support the solid rocket engine casing, the roller part 31 is arranged on the moving part 32, the moving part 32 is installed above the grinding bed 1, and can move along the length direction of the grinding bed 1 to adjust the position of the moving part 32 on the grinding bed 1; the grinding device 4 is used to grind the inner surface of the insulation layer of the solid rocket engine, the grinding device 4 includes a sliding seat 41, a connecting rod 42 and a grinding head 43, the sliding seat 41 is installed on the grinding bed 1, and can move along the length direction of the grinding bed 1, one end of the connecting rod 42 is connected to the sliding seat 41, and the other end of the connecting rod 42 is connected to the grinding head 43.

[0054] In this embodiment, one end of the solid rocket engine shell is supported by the supporting part 21, and the bottom of the solid rocket engine shell is supported by the mobile center frame 3. Driven by the driving part 22, the solid rocket engine shell rotates along its central axis, and the grinding device 4 extends the grinding head 43 into the solid rocket engine shell along the end of the solid rocket engine shell away from the supporting part 21. Since the solid rocket engine shell and the grinding head 43 have a line motion, the grinding head 43 can grind the insulation layer on the inner surface of the solid rocket engine shell. The device has a compact structure and is suitable for the grinding operation of the inner surface of the insulation layer of the medium and small solid rocket engine shells. It realizes the replacement of manual grinding with mechanical equipment and improves the grinding efficiency.

[0055] like Figure 1 As shown, the grinding bed 1 includes a bed body 11, a first guide rail 12, a second guide rail 13 and a grinding bed rack 14, the first guide rail 12, the second guide rail 13 and the grinding bed rack 14 are all fixedly arranged on the bed body 11 along the length direction of the bed body 11, the first guide rail 12 and the second guide rail 13 are arranged at intervals, and the grinding bed rack 14 is arranged between the first guide rail 12 and the second guide rail 13.

[0056] In this embodiment, the first guide rail 12 and the second guide rail 13 are respectively located above the bed body 11 near the front edge and near the rear edge, the first guide rail 12 and the second guide rail 13 are arranged in parallel, and the first guide rail 12 and the second guide rail 13 are both linear guides; the tooth top direction of the grinding bed rack 14 is toward the first guide rail 12 or the second guide rail 13, which can effectively prevent debris from falling on the tooth surface of the grinding bed rack 14 and affecting the normal operation of the equipment.

[0057] like Figures 1 to 3 As shown, the grinding head 2 also includes a grinding head body 23 and a protective cover 24. The grinding head body 23 is fixedly mounted on the upper part of one end of the grinding bed 1. The supporting part 21, the driving part 22 and the protective cover 24 are all mounted on the grinding head body 23. The protective cover 24 is located on the outside of the supporting part 21. The supporting part 21 includes a three-jaw chuck structure, a supporting arm and a chuck. The three-jaw chuck structure is similar to the three-jaw chuck structure of the existing machine tool. One end of the supporting arm is fixed on the claw of the three-jaw chuck structure, and the chuck is mounted on the other end of the supporting arm. The chuck is supported on the outer wall of the solid rocket engine shell. The installation position of the chuck and the supporting arm can be adjusted, so that the supporting part 21 can be adjusted according to the size of the solid rocket engine shell. An observation port 241 is provided on the protective cover 24 to facilitate observation of the supporting effect. A protective glass is installed on the observation port 241.

[0058] like Figure 1 , Figures 4 to 7 As shown, the moving part 32 includes a roller seat moving part body 321, a slider bearing 322, a roller seat driving device 323 and a gear 324, the slider bearing 322 is fixedly installed at the bottom of the roller seat moving part body 321, the roller seat driving device 323 is fixedly installed on the roller seat moving part body 321, and the output end of the roller seat driving device 323 is connected to the gear 324, and the gear 324 is meshed with the grinding bed rack 14.

[0059] In this embodiment, the roller seat driving device 323 includes a motor and a commutator. The motor can be a servo motor. The servo motor is installed horizontally, and the gear 324 is also installed horizontally. The servo motor is connected to the gear 324 through the commutator, and the rotation of the servo motor output shaft is transmitted to the gear 324. The gear 324 is engaged with the rack 14 of the grinding bed. The gear 324 rotates and drives the mobile center frame 3 to move along the first guide rail 12 and the second guide rail 13.

[0060] like Figure 3 and Figure 4As shown, the roller part 31 includes a roller 311, a roller mounting rod 312, a transmission gear set 313, a roller adjustment screw nut 314, a roller adjustment screw 315 and a roller adjustment driving device 316. The roller 311 is rotatably mounted on the top of one end of the roller mounting rod 312. The roller mounting rod 312 is provided with a roller mounting rod rack 317. The roller mounting rod rack 317 is arranged along the length direction of the roller mounting rod 312. One end of the transmission gear set 313 is meshed with the roller mounting rod rack 317. The roller adjustment screw 315 is rotatable along the axis and is installed on the moving The roller adjustment drive device 316 is installed on the moving part 32, and the output end of the roller adjustment drive device 316 is connected to the roller adjustment screw 315, which is used to drive the roller adjustment screw 315 to rotate. The roller adjustment screw 315 is threadedly connected to the roller adjustment nut 314, and the roller adjustment screw 315 can drive the roller adjustment nut 314 to move along the length direction of the roller adjustment screw 315. The roller adjustment nut 314 is provided with a roller adjustment nut rack 318, and the roller adjustment nut rack 318 is meshed with the other end of the transmission gear set 313.

[0061] like Figure 1As shown, the number of the mobile center frame 3 is one. There are two mobile center frames 3 in this embodiment, and the two mobile center frames 3 are arranged at intervals on the grinding bed 1. The position of the mobile center frame 3 in this embodiment is easy to adjust, and the center frame 3 can be quickly moved to the desired position through the roller seat driving device 323. The roller part 31 of the mobile center frame 3 in this embodiment is easy to adjust and can quickly adapt to different direct rocket launch shells. In this embodiment, the roller 311, the roller mounting rod 312, the transmission gear set 313 and the roller adjustment nut 314 are divided into left rollers, right rollers, left roller mounting rods, right roller mounting rods, left transmission gear sets, right transmission gear sets, left roller adjustment nuts and right roller adjustment nuts, and the structures on the left and right sides are the same and symmetrically arranged. The roller adjustment screw 315 is a two-stage structure, and the two stages are connected by a coupling. The threads of the two stages of the roller adjustment screw are in opposite directions, so that the roller adjustment drive device 316 can drive the roller adjustment screw 315 to rotate. The roller adjustment screw 315 can drive the left roller adjustment nut and the right roller adjustment nut to move towards or away from each other at the same time. The transmission gear set 313 is composed of two meshing gears. The roller adjustment nut 314 is connected to the transmission gear set 313 through the roller adjustment nut rack 318, and the linear motion of the roller adjustment nut 314 is converted into the rotation of the transmission gear set 313. The rotation of the transmission gear set 313 is then converted into the linear motion of the roller mounting rod 312 through the roller mounting rod rack 317. The roller mounting rod 312 is slidably installed on the roller seat moving part body 321, and the roller mounting rod 312 is provided with a sliding key, which can limit the rotation of the roller mounting rod 312 relative to the roller seat moving part body 321. The left roller mounting rod and the right roller mounting rod are arranged at a predetermined angle, and can support rocket engine casings of multiple specifications. The roller adjustment drive device 316 can be a servo motor.

[0062] like Figure 1 , Figure 6 and Figure 7 As shown, the automatic grinding machine for the insulation layer of a medium-caliber rocket also includes a clamping device 5, which is fixedly mounted on the roller seat moving part body 321. The clamping device 5 includes a base 51, a rotating part 52, a bracket 53 and a clamping part 54. The base 51 is fixedly mounted on the roller seat moving part body 321, one end of the bracket 53 is rotatably mounted on the base 51, one end of the rotating part 52 is connected to the bracket 53, and the other end of the rotating part 52 is connected to the base 51, and is used to drive the bracket 53 to rotate relative to the base 51. The clamping part 54 is mounted on the other end of the bracket 53. When the bracket 53 drives the clamping part 54 to rotate above the solid rocket engine casing, the clamping part 54 limits the position of the solid rocket engine casing through the pressure wheel.

[0063] like Figure 6 and Figure 7 As shown, the rotating part 52 includes a rotating large gear 521, a rotating small gear and a rotating drive 523. The rotating large gear 521 is fixedly mounted on the base 51, the rotating drive 523 is fixedly mounted on the bracket 53, the rotating small gear is mounted on the output shaft of the rotating drive 523, the rotating small gear is meshed with the rotating large gear 521, and the bracket 53 is driven to rotate relative to the base 51 through the relative movement of the rotating small gear and the rotating large gear 521;

[0064] The clamping part 54 includes a pressure wheel 541, a pressure wheel bracket 542, a pressure wheel adjustment drive 543 and a pressure wheel push rod 544. The pressure wheel adjustment drive 543 is installed at the other end of the bracket 53. The pressure wheel adjustment drive 543 is connected to one end of the pressure wheel push rod 544 and is used to drive the pressure wheel push rod 544 to move. The other end of the pressure wheel push rod 544 is hinged to the pressure wheel bracket 542. There are two pressure wheels 541, and the two pressure wheels 541 are arranged at intervals on the left and right ends of the pressure wheel bracket 542.

[0065] In this embodiment, the rotation drive 523 can be a servo motor or a servo motor with a reducer. The pressure wheel adjustment drive 543 is also a servo motor, which can adopt a structure in the prior art that can convert rotation into linear motion to drive the pressure wheel push rod 544 to move.

[0066] like Figure 6 and Figure 7 As shown, the clamping device 5 also includes a locking portion 55, which is installed on the base 51. The locking portion 55 includes a locking drive 551 and a locking tongue 552. The locking drive 551 is installed on the base 51. The locking drive 551 is connected to the locking tongue 552 and is used to drive the locking tongue 552 to move. The bracket 53 begins to have a locking hole 531 corresponding to the locking tongue 552.

[0067] like Figure 1 , Figure 8 and Fig. 9As shown, the grinding head 43 includes a first grinding extension arm 431, a second grinding extension arm 432, a grinding tool 433, an elastic member 434, an adjustment slider 435, an adjustment slider driver 436 and a grinding head base 437, one end of the first grinding extension arm 431 and one end of the second grinding extension arm 432 are both hinged on the grinding head base 437, and the first grinding extension arm 431 is symmetrically arranged at intervals, the number of the grinding tools 433 is two groups, which are respectively arranged on the other end of the first grinding extension arm 431 and the other end of the second grinding extension arm 432, one end of the elastic member 434 is connected to the middle of the first grinding extension arm 431 The elastic member 434 is connected to the middle of the second polishing extension arm 432, and the adjusting slider 435 is arranged between the first polishing extension arm 431 and the second polishing extension arm 432. The first polishing extension arm 431 and the second polishing extension arm 432 are provided with a sliding inclined surface on one side close to the adjusting slider 435, and the adjusting slider 435 is in conflict with the sliding inclined surface. The adjusting slider drive 436 is connected to the adjusting slider 435 and is used to drive the adjusting slider 435 to move, and the first polishing extension arm 431 and the second polishing extension arm 432 are pushed to expand outward through the conflict between the adjusting slider 435 and the sliding inclined surface.

[0068] In this embodiment, the elastic member 434 may be a tension spring, and there are two tension springs, which are respectively arranged at the upper and lower parts of the middle sections of the first polishing extension arm 431 and the second polishing extension arm 432. The adjustment slider drive 436 may be a linear motor or a power device capable of providing linear motion, such as a cylinder.

[0069] like Figure 1 and Figure 8 As shown, the sliding seat 41 includes a sliding seat body 411, a sliding seat drive 412, a sliding seat moving gear 413 and a sliding seat slider bearing 414; the sliding seat slider bearing 414 is fixedly installed at the bottom of the sliding seat body 411, and the sliding seat slider bearing 414 cooperates with the first guide rail 12 and the second guide rail 13, the sliding seat drive 412 is installed on the sliding seat body 411, the sliding seat moving gear 413 is connected to the output end of the sliding seat drive 412, and the sliding seat moving gear 413 is meshed with the grinding bed rack 14.

[0070] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An automatic grinding machine for the thermal insulation layer of a medium-caliber rocket, characterized in that: include: Grinding the bed (1); A grinding machine head (2), the grinding machine head (2) being fixedly mounted on the upper part of one end of the grinding bed (1), the grinding machine head (2) comprising a holding part (21) and a driving part (22), the holding part (21) being used for holding a solid rocket engine casing, the driving part (22) being connected to the holding part (21) and being used for driving the solid rocket engine casing to rotate through the holding part (21); A mobile center frame (3), the mobile center frame (3) being arranged on a grinding bed (1), the mobile center frame (3) comprising a roller portion (31) and a moving portion (32), the roller portion (31) being used to support a solid rocket engine casing, the roller portion (31) being arranged on the moving portion (32), the moving portion (32) being installed above the grinding bed (1) and being able to move along the length direction of the grinding bed (1) so as to adjust the position of the moving portion (32) on the grinding bed (1); A grinding device (4) is used to grind the inner surface of the thermal insulation layer of a solid rocket engine. The grinding device (4) comprises a sliding seat (41), a connecting rod (42) and a grinding head (43). The sliding seat (41) is installed on a grinding bed (1) and can move along the length direction of the grinding bed (1). One end of the connecting rod (42) is connected to the sliding seat (41), and the other end of the connecting rod (42) is connected to the grinding head (43).

2. The automatic grinding machine for the thermal insulation layer of a medium-caliber rocket according to claim 1, characterized in that: The grinding bed (1) comprises a bed body (11), a first guide rail (12), a second guide rail (13) and a grinding bed rack (14); the first guide rail (12), the second guide rail (13) and the grinding bed rack (14) are all fixedly arranged on the bed body (11) along the length direction of the bed body (11); the first guide rail (12) and the second guide rail (13) are arranged at intervals; and the grinding bed rack (14) is arranged between the first guide rail (12) and the second guide rail (13).

3. The automatic grinding machine for the thermal insulation layer of a medium-caliber rocket according to claim 1, characterized in that: The grinding head (2) further comprises a grinding head body (23) and a protective cover (24); the grinding head body (23) is fixedly mounted on the upper part of one end of the grinding bed (1); the holding part (21), the driving part (22) and the protective cover (24) are all mounted on the grinding head body (23); the protective cover (24) is located outside the holding part (21); an observation port (241) is provided on the protective cover (24); and a protective glass is installed on the observation port (241); the moving part (21) is provided with a plurality of movable parts; (32) comprises a roller seat moving part body (321), a slider bearing (322), a roller seat driving device (323) and a gear (324), wherein the slider bearing (322) is fixedly mounted on the bottom of the roller seat moving part body (321), the roller seat driving device (323) is fixedly mounted on the roller seat moving part body (321), and the output end of the roller seat driving device (323) is connected to the gear (324), and the gear (324) is meshed with the rack (14) of the grinding bed.

4. The automatic grinding machine for the thermal insulation layer of a medium-caliber rocket according to claim 3, characterized in that: The roller portion (31) comprises a roller (311), a roller mounting rod (312), a transmission gear set (313), a roller adjustment nut (314), a roller adjustment screw (315) and a roller adjustment driving device (316); the roller (311) is rotatably mounted on the top of one end of the roller mounting rod (312); a roller mounting rod rack (317) is provided on the roller mounting rod (312); the roller mounting rod rack (317) is arranged along the length direction of the roller mounting rod (312); one end of the transmission gear set (313) is meshed with the roller mounting rod rack (317); the roller adjustment screw (315) is rotatably mounted on the moving guide wheel (316) and the roller mounting rod rack (317) is arranged along the length direction of the roller mounting rod (312); one end of the transmission gear set (313) is meshed with the roller mounting rod rack (317); the roller adjustment screw (315) is rotatably mounted on the moving guide wheel (316) along the axis. The roller adjustment drive device (316) is mounted on the moving part (32), the output end of the roller adjustment drive device (316) is connected to the roller adjustment screw (315) for driving the roller adjustment screw (315) to rotate, the roller adjustment screw (315) is threadedly connected to the roller adjustment nut (314), and the roller adjustment screw (315) can drive the roller adjustment nut (314) to move along the length direction of the roller adjustment screw (315), and the roller adjustment nut (314) is provided with a roller adjustment nut rack (318), and the roller adjustment nut rack (318) is meshed with the other end of the transmission gear set (313).

5. The automatic grinding machine for the thermal insulation layer of a medium-caliber rocket according to claim 4, characterized in that: The number of the movable center frame (3) is at least one.

6. The automatic grinding machine for the thermal insulation layer of a medium-caliber rocket according to claim 4, characterized in that: The automatic grinding machine for the thermal insulation layer of a medium-caliber rocket further comprises a clamping device (5), wherein the clamping device (5) is fixedly mounted on the main body (321) of the movable part of the roller seat; The clamping device (5) comprises a base (51), a rotating part (52), a bracket (53) and a clamping part (54), wherein the base (51) is fixedly mounted on the roller seat moving part body (321), one end of the bracket (53) is rotatably mounted on the base (51), one end of the rotating part (52) is connected to the bracket (53), the other end of the rotating part (52) is connected to the base (51), and is used to drive the bracket (53) to rotate relative to the base (51), and the clamping part (54) is mounted on the other end of the bracket (53), and when the bracket (53) drives the clamping part (54) to rotate above the solid rocket engine casing, the clamping part (54) limits the position of the solid rocket engine casing through a pressure wheel.

7. The automatic grinding machine for the thermal insulation layer of a medium-caliber rocket according to claim 6, characterized in that: The rotating part (52) comprises a rotating large gear (521), a rotating small gear and a rotating drive (523), wherein the rotating large gear (521) is fixedly mounted on the base (51), the rotating drive (523) is fixedly mounted on the bracket (53), the rotating small gear is mounted on the output shaft of the rotating drive (523), the rotating small gear is meshed with the rotating large gear (521), and the bracket (53) is driven to rotate relative to the base (51) through the relative movement of the rotating small gear and the rotating large gear (521); The clamping part (54) includes a pressure wheel (541), a pressure wheel bracket (542), a pressure wheel adjustment drive (543) and a pressure wheel push rod (544). The pressure wheel adjustment drive (543) is installed at the other end of the bracket (53). The pressure wheel adjustment drive (543) is connected to one end of the pressure wheel push rod (544) and is used to drive the pressure wheel push rod (544) to move. The other end of the pressure wheel push rod (544) is hinged to the pressure wheel bracket (542). There are two pressure wheels (541), and the two pressure wheels (541) are arranged at intervals at the left and right ends of the pressure wheel bracket (542).

8. The automatic grinding machine for the thermal insulation layer of a medium-caliber rocket according to claim 6, characterized in that: The clamping device (5) further comprises a locking portion (55), wherein the locking portion (55) is mounted on the base (51), wherein the locking portion (55) comprises a locking drive (551) and a locking tongue (552), wherein the locking drive (551) is mounted on the base (51), wherein the locking drive (551) is connected to the locking tongue (552) and is used to drive the locking tongue (552) to move, and wherein the bracket (53) begins to have a locking hole (531) corresponding to the locking tongue (552).

9. The automatic grinding machine for the thermal insulation layer of a medium-caliber rocket according to claim 2, characterized in that: The grinding head (43) comprises a first grinding extension arm (431), a second grinding extension arm (432), a grinding tool (433), an elastic member (434), an adjusting slider (435), an adjusting slider drive (436) and a grinding head base (437); one end of the first grinding extension arm (431) and one end of the second grinding extension arm (432) are both hinged on the grinding head base (437), and the first grinding extension arm (431) is symmetrically arranged at intervals; the grinding tools (433) are in two groups, which are respectively arranged on the other end of the first grinding extension arm (431) and the other end of the second grinding extension arm (432); one end of the elastic member (434) is connected to the first grinding extension arm (431); The first polishing extension arm (431) and the second polishing extension arm (432) are connected in the middle, and the other end of the elastic member (434) is connected to the middle of the second polishing extension arm (432). The adjusting slider (435) is arranged between the first polishing extension arm (431) and the second polishing extension arm (432). The first polishing extension arm (431) and the second polishing extension arm (432) are provided with a sliding inclined surface on one side close to the adjusting slider (435). The adjusting slider (435) is in conflict with the sliding inclined surface. The adjusting slider drive (436) is connected to the adjusting slider (435) and is used to drive the adjusting slider (435) to move. The first polishing extension arm (431) and the second polishing extension arm (432) are pushed to expand outward through the conflict between the adjusting slider (435) and the sliding inclined surface.

10. The automatic grinding machine for the thermal insulation layer of a medium-caliber rocket according to claim 2, characterized in that: The sliding seat (41) comprises a sliding seat body (411), a sliding seat drive (412), a sliding seat moving gear (413) and a sliding seat slider bearing (414); the sliding seat slider bearing (414) is fixedly mounted on the bottom of the sliding seat body (411), and the sliding seat slider bearing (414) is matched with the first guide rail (12) and the second guide rail (13); the sliding seat drive (412) is mounted on the sliding seat body (411), the sliding seat moving gear (413) is connected to the output end of the sliding seat drive (412), and the sliding seat moving gear (413) is meshed with the grinding bed rack (14).

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