Lathe for cutting propellant grain

Abstract

The utility model provides a propellant grain cutting lathe which comprises a machine frame, a rotating chuck, a feeding assembly, a cutting tool, a lead screw driving assembly, an ejecting base and a guiding and conveying base, the rotating chuck is arranged above the machine frame, a material passing hole is formed in the rotating chuck, the cutting tool is connected to the machine frame in a sliding mode, the lead screw driving assembly is arranged in the axial direction of a grain, and the ejecting base is arranged on the machine frame. The middle of the jacking base is rotationally connected with a jacking sleeve, and the guiding and conveying base is located below the rotating chuck. According to the cutting lathe for the propellant grain, the propellant grain is conveyed into the material passing hole of the rotating chuck through the feeding assembly, the rotating chuck is used for clamping the propellant grain and driving the propellant grain to rotate, the outer end face of the propellant grain is limited by the jacking seat through the jacking sleeve, and then the propellant grain is cut or cut through the cutting tool; the precision of the machining diameter or the machining length of the grain is guaranteed, the cut grain is guided outwards through the guiding and conveying base, the cutting efficiency and the cutting precision of the grain are improved through the structure, and potential safety hazards are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting and processing of propellant charges, and more specifically, relates to a cutting lathe for propellant charges for launching. Background Art

[0002] When processing ammunition, it is necessary to use a lathe to turn the propellant charge. On the one hand, the peripheral wall of the propellant charge needs to be cut, and on the other hand, it also involves cutting and truncating the propellant charge. The traditional manual processing method not only fails to effectively guarantee the processing accuracy, but also has a slow processing speed. It often takes several minutes to complete the processing of a single propellant charge, seriously restricting the production speed increase. More importantly, it also has a great danger, is prone to deflagration accidents, and poses a great threat to the lives of operators. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a cutting lathe for propellant charges for launching, which can accurately position and cut the propellant charge, helps to improve the cutting accuracy, and avoid potential safety hazards during the processing of the propellant charge.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: providing a cutting lathe for propellant charges for launching, including a frame, a feeding assembly, a rotating chuck, a cutting tool, a clamping seat, and a guiding seat. The rotating chuck is arranged above the frame, and a horizontally penetrating material passing hole is provided on the rotating chuck. The cutting tool is slidably connected to the frame and is located on one side of the main shaft of the rotating chuck. The feeding assembly and the clamping seat are respectively located at both ends of the rotating chuck. The clamping seat is slidably connected to the frame, and a clamping sleeve with a horizontally arranged main shaft is rotatably connected to the clamping seat. One end face of the clamping sleeve is used to abut against the end face of the propellant charge to limit the axial position of the propellant charge. The guiding seat is located below the rotating chuck and extends obliquely downward to the outside of the frame for receiving and guiding the processed propellant charge.

[0005] In a possible implementation manner, a lead screw drive assembly extending along the axial direction of the rotating chuck is arranged on the frame. The clamping seat is connected to the driving end of the lead screw drive assembly through a telescopic driving member. The clamping seat can horizontally move under the drive of the lead screw drive assembly and the telescopic driving member to limit the axial position of the propellant charge.

[0006] In a possible implementation manner, a drill bit for drilling the propellant charge is further provided at the driving end of the lead screw drive assembly. The drill bit penetrates through the clamping sleeve, and the clamping sleeve can retract under the drive of the telescopic driving member to make the drill bit protrude from the clamping seat.

[0007] In some embodiments, a rotating bearing sleeving the outer periphery of the clamping sleeve is provided on the rotating chuck. A mating pin extending towards the axial center is provided on the inner peripheral wall of the clamping sleeve. The mating pin can move along the external thread of the drill bit under the drive of the telescopic driving member to remove the chips on the drill bit.

[0008] In one possible implementation, the screw drive assembly includes a screw and a nut threadedly connected to the screw, the screw is connected to a rotary drive member, a mounting seat is provided above the nut, and the telescopic drive member and the drill bit are both installed on the mounting seat.

[0009] In some embodiments, a proximity sensor is provided on the frame and is located on one side of the screw. The proximity sensor is electrically connected to a controller. A positioning block extending outward is provided on the side of the mounting seat. The proximity sensor is used to monitor the position of the positioning block and generate proximity parameters. The controller is used to receive the proximity parameters and send control instructions to the rotating drive component.

[0010] In one possible implementation, the loading assembly includes a loading bar seat and a pushing rod. The loading bar seat is used to support the medicine column. The pushing rod is located at one end of the loading bar seat away from the rotating chuck and is used to push the medicine column so that the medicine column enters the feeding hole.

[0011] In some embodiments, a lower slide capable of moving axially along the rotating chuck is provided on the frame. The lower slide is located on the side of the loading strip seat away from the rotating chuck. The pushing rod is connected to the lower slide and can move axially driven by the lower slide. A first driving member for driving the lower slide is connected to the frame.

[0012] In some embodiments, the push rod is connected to the lower slide via an upper slide. The upper slide can drive the push rod to move axially along the rotary chuck. The lower slide is connected to a second driving member for driving the upper slide.

[0013] In some embodiments, the upper slide is connected to a gravity hammer via a pull rope, and pulleys for guiding the pull rope are respectively provided on the top and bottom surfaces of the lower slide. A clearance groove is provided on the frame that passes through the upper and lower parts for the pull rope to pass through. The gravity hammer pulls the upper slide toward the side close to the rotating chuck through the pull rope so that the push rod is pressed against the end surface of the medicine column.

[0014] Compared with the prior art, the solution shown in the embodiment of the present application utilizes a loading assembly to deliver the medicine column to the feeding hole of the rotary chuck, utilizes the rotary chuck to clamp the medicine column and drive the medicine column to rotate, and the tightening seat limits the outer end surface of the medicine column through the tightening sleeve, and then uses the cutting tool to cut or cut the medicine column to ensure the accuracy of the processing diameter or processing length of the medicine column. The cut material column is guided outward by the guide seat. The above structure improves the cutting efficiency and cutting accuracy of the medicine column and avoids safety hazards during the medicine column processing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 Structural schematic diagram of the propellant charge cutting lathe provided by the embodiment of the present invention;

[0017] Figure 2 For the embodiment of the present invention Figure 1 Another angle structural schematic diagram of the feeding assembly in the above;

[0018] Figure 3 For the embodiment of the present invention Figure 2 A - A sectional structural schematic diagram in the above;

[0019] Figure 4 For the embodiment of the present invention Figure 1 Another angle partial enlarged structural schematic diagram of the propellant charge cutting lathe in the above;

[0020] Figure 5 For the embodiment of the present invention Figure 4 Front view partial structural schematic diagram in the above;

[0021] Figure 6 For the embodiment of the present invention Figure 5 Partial enlarged structural schematic diagram of Ⅰ in the above;

[0022] Among them, each reference numeral in the figure:

[0023] 1, frame; 11, relief groove; 12, feeding hopper; 13, guiding seat; 2, rotating chuck; 21, material passing hole; 3, cutting tool; 4, lead screw drive assembly; 41, lead screw; 42, nut; 43, rotating drive member; 44, mounting seat; 45, telescopic drive member; 5, tightening seat; 51, tightening sleeve; 52, rotating bearing; 53, mating pin; 6, drill bit; 61, proximity sensor; 62, positioning block; 7, feeding assembly; 71, feeding bar seat; 72, pushing rod; 81, lower sliding seat; 82, first drive member; 83, upper sliding seat; 84, second drive member; 91, pulling rope; 92, gravity hammer; 93, pulley; 94, propellant charge. Specific embodiments

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0026] Please refer to Figures 1 to 6 , and now the propellant charge cutting lathe provided by the present utility model will be described. The propellant charge cutting lathe includes a frame 1, a feeding assembly 7, a rotating chuck 2, a cutting tool 3, a clamping seat 5 and a guiding seat 13. The rotating chuck 2 is disposed above the frame 1, and a horizontally penetrating material passing hole 21 is provided on the rotating chuck 2. The cutting tool 3 is slidably connected to the frame 1 and is located on one side of the main shaft of the rotating chuck 2. The feeding assembly 7 and the clamping seat 5 are respectively located at both ends of the rotating chuck 2. The clamping seat 5 is slidably connected to the frame 1, and a clamping sleeve 51 with a horizontally arranged main shaft is rotatably connected to the clamping seat 5. One end face of the clamping sleeve 51 is used to abut against the end face of the propellant charge 94 to limit the axial position of the propellant charge 94. The guiding seat 13 is located below the rotating chuck 2 and extends obliquely downward to the outside of the frame 1 for receiving and guiding the processed propellant charge 94.

[0027] Compared with the prior art, the propellant charge cutting lathe provided in this embodiment uses the feeding assembly 7 to send the propellant charge 94 into the material passing hole 21 of the rotating chuck 2, clamps the propellant charge 94 by the rotating chuck 2 and drives the propellant charge 94 to rotate. The tightening seat 5 limits the outer end face of the propellant charge 94 through the tightening sleeve 51, and then the cutting tool 3 is used to cut or slice the propellant charge 94 to ensure the accuracy of the processed diameter or length of the propellant charge 94. The sliced propellant charge is sent outwards through the guiding seat 13. The above structure improves the cutting efficiency and cutting accuracy of the propellant charge 94 and avoids potential safety hazards during the processing of the propellant charge 94.

[0028] In this embodiment, when the lathe processes the propellant charge 94, the positioning, cutting and other steps can be completed without manual operation, avoiding potential safety hazards of manual operation and ensuring the accuracy of the processing of the propellant charge 94.

[0029] The cutting tool 3 can not only perform cutting on the outer peripheral wall of the propellant charge 94, but also perform fixed-length truncation on the length of the propellant charge 94, and the cutting tool head is selected and replaced according to the above different requirements. When the cutting tool 3 performs cutting on the outer peripheral wall of the propellant charge 94, the cutting tool 3 can move along the axial direction of the propellant charge 94 to ensure that different parts of the outer periphery of the propellant charge 94 are processed. When the cutting tool 3 performs fixed-length truncation on the propellant charge 94, the cutting tool 3 can move horizontally along the radial direction of the propellant charge 94 to achieve effective truncation of the propellant charge 94 and meet the length requirement of the propellant charge 94.

[0030] The tightening sleeve 51 can rotate relative to the tightening seat 5, which is convenient for cooperating with the rotation of the propellant charge 94 to realize the cutting or cutting effect of the cutting tool 3 on the propellant charge 94, avoid damage to the propellant charge 94, and ensure the smoothness of the cutting process.

[0031] In a possible implementation, please refer to Figures 1 to 6 , a lead screw drive assembly 4 extending along the axial direction of the rotating chuck 2 is provided on the frame 1, and the tightening seat 5 is connected to the drive end of the lead screw drive assembly 4 through the telescopic drive member 45. The tightening seat 5 can move horizontally under the drive of the lead screw drive assembly 4 and the telescopic drive member 45 to limit the axial position of the propellant charge 94.

[0032] In this embodiment, when limiting the axial position of the propellant charge 94, first drive the tightening seat 5 to extend out by means of the telescopic drive member 45, and then drive the tightening seat 5 and the telescopic drive member 45 to move synchronously by using the lead screw drive assembly 4, so that the tightening seat 5 can move to a preset position. The preset position is set according to the part of the propellant charge 94 to be cut or the length to be cut, which is convenient for ensuring the processing accuracy of the propellant charge 94.

[0033] In a possible implementation, please refer to Figures 1 to 6, a drill bit 6 for drilling the propellant column 94 is further provided at the driving end of the lead screw driving assembly 4. The drill bit 6 penetrates through the top pressing sleeve 51, and the top pressing sleeve 51 can retract driven by the telescopic driving member 45 so that the drill bit 6 protrudes from the top pressing seat 5.

[0034] In this embodiment, the telescopic driving member 45 is arranged parallel to the main shaft of the rotary chuck 2 and can drive the top pressing seat 5 to move horizontally. The top pressing seat 5 is a plate-shaped member extending vertically, which is convenient for installing the top pressing sleeve 51, meets the rotational matching effect between the top pressing sleeve 51 and the top pressing seat 5, enables the top pressing sleeve 51 to rotate synchronously with the propellant column 94, and ensures the smooth processing of the propellant column 94.

[0035] On the basis of the above structure, the drill bit 6 is arranged at the driving end of the lead screw driving assembly 4 for drilling or reaming the propellant column 94. The above drilling or reaming operation can also be set before cutting the propellant column 94. First, drill or ream the propellant column 94, and then cut the propellant column 94 according to the length requirement.

[0036] In some embodiments, please refer to Figures 1 to 6 , a rotating bearing 52 sleeved on the outer periphery of the top pressing sleeve 51 is provided on the rotary chuck 2. A mating pin 53 extending toward the axis is provided on the inner peripheral wall of the top pressing sleeve 51. The mating pin 53 can move along the external thread of the drill bit 6 driven by the telescopic driving member 45 to remove the chips on the drill bit 6.

[0037] In this embodiment, the setting of the rotating bearing 52 effectively reduces the frictional resistance between the top pressing sleeve 51 and the top pressing seat 5, enables the top pressing sleeve 51 to rotate smoothly relative to the top pressing seat 5 to cooperate with the rotation of the propellant column 94. The mating pin 53 on the peripheral wall of the top pressing sleeve 51 can move along the external thread of the drill bit 6. The top pressing sleeve 51 rotates relative to the drill bit 6 under the guidance of the mating pin 53, meets the requirement of the mating pin 53 moving along the axial direction of the drill bit 6, and effectively removes the chips inside the drill bit 6.

[0038] In a possible implementation manner, please refer to Figures 1 to 6 , the lead screw driving assembly 4 includes a lead screw 41 and a nut 42 threadedly connected to the lead screw 41. The lead screw 41 is connected with a rotary driving member 43. An installation seat 44 is provided above the nut 42. The telescopic driving member 45 and the drill bit 6 are both installed on the installation seat 44.

[0039] In this embodiment, the rotary driving member 43 is used to drive the lead screw 41 to rotate, and the nut 42 drives the installation seat 44 to move along the axial direction of the lead screw 41. Further, the top pressing seat 5 can be driven by the installation seat 44 to approach the propellant column 94, and the end face of the propellant column 94 is effectively pressed by the top pressing sleeve 51. The top pressing sleeve 51 can rotate circumferentially with the propellant column 94 to meet the cutting requirement of the propellant column 94.

[0040] In some embodiments, please refer toFigures 1 to 6 On the frame 1, a proximity sensor 61 is provided on one side of the lead screw 41. The proximity sensor 61 is electrically connected to a controller. A positioning block 62 extending outward is provided on the side of the mounting seat 44. The proximity sensor 61 is used to monitor the position of the positioning block 62 and generate proximity parameters, and the controller is used to receive the proximity parameters and send control instructions to the rotary driving member 43.

[0041] In this embodiment, in order to facilitate the control of the moving distance of the lead screw drive assembly 4, a proximity sensor 61 capable of monitoring the position of the nut 42 is provided on the frame 1. The proximity sensor 61 is used to monitor the position of the positioning block 62, generate proximity parameters and send them to the controller. The controller can determine whether the position of the mounting seat 44 meets the preset requirements according to the preset program. If the preset requirements are met, the controller sends control instructions to the rotary driving member 43 to stop driving the rotary driving member 43 and maintain the stability of the positions of the components.

[0042] In a possible implementation manner, please refer to Figures 1 to 6 , the feeding assembly 7 includes a feeding strip seat 71 and a pushing rod 72. The feeding strip seat 71 is used to support the propellant column 94, and the pushing rod 72 is located at one end of the feeding strip seat 71 away from the rotary chuck 2 and is used to push the propellant column 94 so that the propellant column 94 enters the feeding hole 21.

[0043] In this embodiment, a feeding strip seat 71 is provided on the side of the rotary chuck 2 away from the tightening seat 5. The feeding strip seat 71 is provided with a supporting groove opening upward and used to support the propellant column 94. There are various feeding methods for the propellant column 94, and different methods such as using a robotic arm to clamp the propellant column 94 for feeding or using a telescopic member to horizontally push the propellant column 94 for feeding can be adopted.

[0044] The propellant column 94 on the feeding strip seat 71 is pushed by the pushing rod 72 and can move axially to enter the feeding hole 21 of the rotary chuck 2. The propellant column 94 gradually extends out of the feeding hole 21 and approaches the tightening seat 5. The tightening seat 5 can limit the end face of the propellant column 94 by means of the tightening sleeve 51, which is convenient for cooperating with the cutting tool 3 to realize the fixed-length cutting of the propellant column 94.

[0045] Specifically, a feeding hopper 12 for feeding the feeding strip seat 71 can be provided on the frame 1, and the feeding strip seat 71 can be automatically fed by means of a robotic arm grasping or a telescopic member pushing.

[0046] In a possible implementation manner, please refer to Figures 1 to 6 , a lower sliding seat 81 capable of axially moving along the rotary chuck 2 is provided on the frame 1. The lower sliding seat 81 is located on the side of the feeding strip seat 71 away from the rotary chuck 2. The pushing rod 72 is connected to the lower sliding seat 81 and can axially move under the drive of the lower sliding seat 81. A first driving member 82 for driving the lower sliding seat 81 is connected to the frame 1.

[0047] In this embodiment, to meet the required displacement length, the frame 1 is further provided with a lower slide 81 slidably connected thereto. To avoid the charge 94 above the loading bar seat 71, the upper slide 83 can be moved to a limit position away from the rotary chuck 2, thereby fully avoiding the charge 94. The lower slide 81 then drives the pusher rod 72 toward the rotary chuck 2, causing the charge 94 to move axially into the feed hole 21, thereby fully pushing the charge 94 and meeting the required displacement range of the charge 94.

[0048] Based on the above structure, please refer to Figures 1 to 6 The pusher rod 72 is connected to the lower slide 81 via an upper slide 83. The upper slide 83 can drive the pusher rod 72 to move axially along the rotary chuck 2. The lower slide 81 is connected to a second driving member 84 for driving the upper slide 83. The lower slide 81 and the upper slide 83 can be moved simultaneously toward the side close to the rotary chuck 2, leaving sufficient space for the pusher rod 72 to push the end surface of the drug charge 94, thereby saving space in the structure.

[0049] Furthermore, a first guide rail is provided on the frame 1, and the lower slide 81 is slidably connected to the first guide rail. A second guide rail is provided on the lower slide 81, and the upper slide 83 is slidably connected to the second guide rail, ensuring that the upper slide 83 and the lower slide 81 move accurately and smoothly.

[0050] For some examples, see Figures 1 to 6 The upper slide 83 is connected to a gravity hammer 92 through a pull rope 91. Pulleys 93 for guiding the pull rope 91 are respectively provided on the top and bottom surfaces of the lower slide 81. A makeshift groove 11 is provided on the frame 1 for the pull rope 91 to pass through. The gravity hammer 92 pulls the upper slide 83 toward the side close to the rotary chuck 2 through the pull rope 91 so that the push rod 72 is pressed against the end surface of the medicine column 94.

[0051] In this embodiment, the gravity hammer 92 has a certain weight, and can form a pulling effect on the upper slide 83 through the pull rope 91, so that the upper slide 83 has a tendency to move toward the side close to the medicine column 94, and then the push rod 72 can be used to abut against the end surface of the medicine column 94, so that the medicine column 94 also has a tendency to move toward the side of the tightening seat 5, which is convenient for axially limiting the medicine column 94 with the help of the tightening sleeve 51 on the tightening seat 5.

[0052] When it is necessary to drill and cut the medicine column 94, the telescopic drive member 45 is first used to drive the tightening seat 5 to move to the side close to the medicine column 94, and then the screw drive assembly 4 is used to drive the mounting seat 44 and the tightening seat 5 to move to the position where the end face of the medicine column 94 needs to be limited, so as to facilitate the axial position of the medicine column 94 to be limited by the tightening sleeve 51.

[0053] After that, the propellant charge 94 on the loading strip seat 71 is translated through the material passing hole 21 under the action of the pushing rod 72 and abuts against the end face of the tightening sleeve 51. At this time, the rotary chuck 2 clamps the propellant charge 94 to lock the axial position of the propellant charge 94. Then, the tightening seat 5 retracts following the telescopic driving member 45, and the mating pin 53 on the tightening sleeve 51 can move along the external thread of the drill bit 6 (at this time, the tightening sleeve 51 rotates relative to the tightening seat 5 under the guidance of the mating pin 53), meeting the change requirements of the axial positions of the tightening seat 5 and the drill bit 6. During this process, the mating pin 53 can clean the debris on the outer periphery of the drill bit 6, improving the external cleanliness of the drill bit 6, avoiding affecting the drilling size, and ensuring the drilling quality of the drill bit 6 for the propellant charge 94. Finally, the cutting tool 3 is used to move radially along the propellant charge 94 to cut the propellant charge 94. The propellant charge 94 falls onto the guiding seat 13 and is led out along the guiding seat 13.

[0054] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Propellant charge cutting lathe, characterized in that, The invention comprises a frame (1), a feeding assembly (7), a rotary chuck (2), a cutting tool (3), a pressing seat (5) and a guide seat (13), wherein the rotary chuck (2) is arranged above the frame (1), and a horizontal through-hole (21) is provided on the rotary chuck (2); the cutting tool (3) is slidably connected to the frame (1) and is located on one side of the main shaft of the rotary chuck (2); the feeding assembly (7) and the pressing seat (5) are respectively located on the rotary chuck The two ends of the disk (2) are connected to the tightening seat (5) in a sliding manner on the frame (1). The tightening seat (5) is rotatably connected to a tightening sleeve (51) arranged along the main shaft in a horizontal direction. One end face of the tightening sleeve (51) is used to abut against the end face of the medicine column (94) to limit the axial position of the medicine column (94). The guide seat (13) is located below the rotary chuck (2) and extends obliquely toward the outer side and lower side of the frame (1), and is used to receive and guide the processed medicine column (94).

2. The cutting lathe for propellant grains according to claim 1, wherein, The frame (1) is provided with a screw drive assembly (4) extending axially along the rotary chuck (2); the pressing seat (5) is connected to the driving end of the screw drive assembly (4) through a telescopic driving member (45); the pressing seat (5) can move horizontally under the drive of the screw drive assembly (4) and the telescopic driving member (45) to limit the axial position of the medicine column (94).

3. The cutting lathe for propellant grains according to claim 2, wherein The driving end of the screw drive assembly (4) is also provided with a drill bit (6) for drilling the medicine column (94), and the drill bit (6) is arranged through the tightening sleeve (51). The tightening sleeve (51) can be retracted under the drive of the telescopic drive member (45) to allow the drill bit (6) to protrude from the tightening seat (5).

4. The cutting lathe for propellant grains according to claim 3, wherein, The rotary chuck (2) is provided with a rotating bearing (52) sleeved on the outer periphery of the tightening sleeve (51), and the inner peripheral wall of the tightening sleeve (51) is provided with a matching pin (53) extending toward the axis side. The matching pin (53) can be driven by the telescopic driving member (45) to move along the external thread of the drill bit (6) to remove chips on the drill bit (6).

5. The cutting lathe for propellant grains according to claim 3, wherein, The screw drive assembly (4) comprises a screw (41) and a nut (42) threadedly connected to the screw (41); the screw (41) is connected to a rotary drive member (43); a mounting seat (44) is provided above the nut (42); the telescopic drive member (45) and the drill bit (6) are both mounted on the mounting seat (44).

6. The propellant charge cutting lathe according to claim 5, wherein The frame (1) is provided with a proximity sensor (61) located on one side of the lead screw (41), the proximity sensor (61) is electrically connected to a controller, a side portion of the mounting seat (44) is provided with a positioning block (62) extending outward, the proximity sensor (61) is used to monitor the position of the positioning block (62) and generate a proximity parameter, and the controller is used to receive the proximity parameter and send a control instruction to the rotary drive member (43).

7. The propellant charge cutting lathe according to any one of claims 1 to 6, characterized in that: The feeding component (7) includes a feeding bar seat (71) and a pushing rod (72). The feeding bar seat (71) is used to support the propellant charge (94), and the pushing rod (72) is located at one end of the feeding bar seat (71) away from the rotary chuck (2) and is used to push the propellant charge (94) so that the propellant charge (94) enters the material passing hole (21).

8. The cutting lathe for propellant grains according to claim 7, wherein A lower sliding seat (81) capable of axially moving along the rotary chuck (2) is provided on the frame (1). The lower sliding seat (81) is located on the side of the feeding bar seat (71) away from the rotary chuck (2). The pushing rod (72) is connected to the lower sliding seat (81) and can axially move driven by the lower sliding seat (81). A first driving member (82) for driving the lower sliding seat (81) is connected to the frame (1).

9. The cutting lathe for propellant grains according to claim 8, characterized in that, The pushing rod (72) is connected to the lower sliding seat (81) through an upper sliding seat (83). The upper sliding seat (83) can drive the pushing rod (72) to axially move along the rotary chuck (2). A second driving member (84) for driving the upper sliding seat (83) is connected to the lower sliding seat (81).

10. The propellant charge cutting lathe according to claim 9, characterized in that, The upper sliding seat (83) is connected with a gravity hammer (92) through a pull rope (91). Pulleys (93) for guiding the pull rope (91) are respectively provided on the top surface and the bottom surface of the lower sliding seat (81). A relief groove (11) penetrating up and down for the pull rope (91) to pass through is provided on the frame (1). The gravity hammer (92) pulls the upper sliding seat (83) towards the side close to the rotary chuck (2) through the pull rope (91) so that the pushing rod (72) presses against the end surface of the propellant charge (94).

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