Composite cutter head for cutting and recycling energetic materials

Abstract

The invention belongs to the field of energetic material machining, and particularly relates to a composite cutterhead for cutting and recycling energetic materials, the composite cutterhead comprises a cutter assembly and a cutter handle assembly, the cutter assembly is mounted on the cutter handle assembly, the cutter handle assembly is mounted at the tail end of a feeding transmission shaft, and cooling pipelines are arranged in the cutter assembly and the cutter handle assembly. The cooling device is used for cooling various cutters in the cutter assembly in the cutting process. Compared with the prior art, under the condition that the single-edge back engagement of the blade is guaranteed, the single cutting output is increased by increasing the number of the blades, the machining efficiency is improved, meanwhile, it is guaranteed that the cutting parameters of the machining tool are not changed, the large change of the product surface quality is not caused, the cutting force is relatively dispersed, and excessive temperature change is not generated. Meanwhile, the positions of different cutters can be adjusted, the cutter head is subjected to internal circulation cooling, the temperature of the cutting position can be monitored in real time in the cutting process, and therefore a control system can make response adjustment on cutting parameters according to the temperature characteristic value.

Description

Technical Field

[0001] The invention relates to the field of energetic material machining, in particular to a composite cutter head for cutting and recovering energetic materials. Background Art

[0002] Unlike ordinary metals and non-metallic materials, energetic materials have both hardness, brittleness and viscoelasticity, which makes their machining characteristics very different from conventional metal machining. Metal tools are a commonly used machining tool in energetic material machining, but safety, machining quality, tool parameters and other aspects limit the machining speed, which limits the machining efficiency, and the cooling method is external cooling, which will affect the performance of energetic materials. Currently, the existing energetic material machining tool discs generally have low machining efficiency, and the tool position cannot be adjusted. The tool is not easy to replace after damage, and the tool disc cannot be cooled by internal circulation.

[0003] During the cutting process of energetic materials, a large amount of cutting heat will suddenly be generated due to the characteristics of the energetic materials themselves, processing deformation and vibration, and instantaneous high temperature pulses will appear. When this instantaneous high temperature exceeds a certain range, it will catch fire and cause serious accidents. Therefore, it is of great significance to quickly and accurately measure the dynamic temperature of energetic materials during processing for the safe and efficient production of national defense and military departments.

[0004] In view of the above problems, in response to the demand for mechanical processing of energetic materials, the present invention has developed a composite cutter disc with internal circulation cooling function, which can not only quickly and accurately measure the temperature of the cutting area, but also effectively improve the product processing efficiency. Summary of the invention

[0005] In view of the above problems, in order to improve the efficiency and safety of energetic material processing, a composite cutter disc for energetic material cutting and recovery is provided, which can increase the single cutting amount by increasing the number of knives while ensuring the cutting amount of the single edge back of the blade, thereby improving the processing efficiency. At the same time, the cutting parameters of the processing tool are guaranteed to remain unchanged, without causing a large change in the surface quality of the product, and the cutting force is relatively dispersed, without causing excessive temperature changes. At the same time, the position between different tools can be adjusted, and the cutter disc is internally circulated for cooling, and the temperature of the cutting position can be monitored in real time during the cutting process, so that the control system can respond to and adjust the cutting parameters according to the temperature characteristic value.

[0006] The technical solution to achieve the purpose of the present invention is: a composite cutter disc for cutting and recovering energetic materials, the composite cutter disc comprising a tool assembly and a tool handle assembly, the tool assembly being mounted on the tool handle assembly, the tool handle assembly being mounted at the end of a feed drive shaft, cooling pipelines being arranged inside the tool assembly and the tool handle assembly for dissipating heat from various tools in the tool assembly during the cutting process.

[0007] The tool handle assembly comprises a tool handle seat; one end of the tool handle seat is fixedly connected to the tool assembly, and the other end of the tool handle seat is fixedly connected to the external transmission rod.

[0008] The tool assembly includes a blade, a cutter disc and a blade fixing seat; the blade includes a milling cutter, a bevel scraper and a vertical scratching cutter. The blade fixing seat 7 is fixedly installed on the cutter disc, and the milling cutter is fixed on the blade fixing seat. The blade of the milling cutter is parallel to the plane of the cutter disc; the bevel scraper and the vertical scratching cutter are fixedly installed in the cutter disc slot, the blade of the bevel scraper is parallel to the plane of the cutter disc, and the blade of the vertical scratching cutter is perpendicular to the plane of the cutter disc. The cutter disc is fixedly connected to the handle seat.

[0009] The cooling pipeline includes an inlet pipeline, a shunt pipeline, a main pipeline, and an outlet pipeline. The inlet pipeline and the outlet pipeline are arranged in the tool handle seat, and the shunt pipeline and the main pipeline are arranged on the cutter disc, and the main pipeline is located directly below the blade; one end of the inlet pipeline in the tool handle seat is connected to the inlet pipeline in the transmission rod, and the other end is connected to the shunt pipeline, and the shunt pipeline is connected to the main pipeline; one end of the outlet pipeline in the tool handle seat is connected to the shunt pipeline, and the other end is connected to the outlet pipeline in the external transmission rod.

[0010] An O-ring is provided at the connection between the cutter disc and the internal cooling pipeline of the cutter handle seat.

[0011] The inlet pipeline and outlet pipeline of the tool holder seat and the inlet cooling pipeline and outlet cooling pipeline of the transmission rod are connected through a transition joint, and an O-ring is installed on the transition joint to ensure the connectivity and sealing of the pipeline.

[0012] A sealing cover is arranged on the cutter disc, and the sealing cover covers the connecting piece between the cutter disc and the cutter handle seat to form a sealing protection.

[0013] A temperature sensor installation hole is provided in the cutter disc for installing the temperature sensor. During the actual processing, the temperature sensor will provide real-time feedback of the detected temperature.

[0014] The point where the pipeline contacts the external air is blocked with a plug in combination with curing glue, the end of the transition hole is blocked with a plug in combination with curing glue, the main pipelines are connected through transition holes, and the end of the transition hole is blocked with a plug in combination with curing glue to form a complete cooling circuit.

[0015] For milling cutters and bevel scrapers, the blades are arranged and combined to fully cover the radius of the cutter disc, and the distance between two adjacent blades of each blade is adjusted to control the effective cutting amount when different blades are cutting at the same time.

[0016] Compared with the prior art, the present invention has the following significant advantages:

[0017] (1) In the tool assembly of the present invention, a combination of multiple blades is arranged to ensure that the single edge back of the blade has a certain cutting depth. By increasing the number of blades, the single cutting amount is increased, thereby improving the processing efficiency. At the same time, the cutting parameters of the processing tool are ensured to remain unchanged, without causing a significant change in the surface quality of the product, and the cutting force is relatively dispersed, without causing excessive temperature changes. The installation distance of each blade can be adjusted according to the diameter of the energetic material to be processed and recovered.

[0018] (2) The tool assembly and the tool handle assembly of the composite cutter disc of the present invention are internally provided with cooling pipelines for cooling the tool during the cutting process; and O-rings are provided between the cooling pipelines of the present invention to ensure the sealing of the pipelines.

[0019] (3) A temperature sensor is provided on the cutter disc of the composite cutter disc of the present invention, which is used to feed back the temperature to the control system of the energetic material cutting and recovery system, so as to adjust and control the cutting speed, cutting depth, feed speed, and cooling medium flow rate. When the temperature reaches the warning value, except for continuing cooling, all other actions of the equipment are stopped and an alarm is issued, thereby effectively improving the safety and reliability of the cutting process.

[0020] (4) The blades in the tool assembly of the present invention are installed in a quick-disassembly manner. If a blade is worn, it can be disassembled and replaced independently without affecting other blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings in the specification, which constitute a part of the present invention, 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 improper limitations on the present invention.

[0022] Figure 1 It is a schematic diagram of a composite cutter disc for processing energetic materials according to an embodiment of the present invention.

[0023] Figure 2 is along Figure 1 Section view along line AA.

[0024] Figure 3 It is a schematic diagram of the cooling pipeline of a composite cutter disc for processing energetic materials according to an embodiment of the present invention.

[0025] Figure 4 is along Figure 3 Sectional view along the CC line.

[0026] Figure 5 It is a schematic diagram of a composite cutter head slot for processing energetic materials according to an embodiment of the present invention.

[0027] Figure markings: 1-cutter disc, 2-cutter handle seat, 3-milling cutter, 4-temperature sensor, 5-bevel scraper, 6-vertical scraper, 7-blade fixing seat, 8-cover, 9-locking screw, 10-plug, 11-Plum blossom screw, 12-transmission rod, 13-O-ring, 14-transition joint, 15-positioning locking screw. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as commonly understood by those of ordinary skill in the art to which the present invention belongs.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or other combinations.

[0030] The present invention is described in detail below in conjunction with the accompanying drawings.

[0031] like Figure 1-2 As shown, a composite cutter disc for cutting and recovering energetic materials comprises a cutter assembly and a tool holder assembly.

[0032] The handle assembly includes a handle seat 2, a transition joint 14, a locking screw 15 and an O-ring 13;

[0033] The tool holder seat 2 is a cylindrical structure with a cylindrical end. Two positioning holes perpendicular to the axial direction of the tool holder seat 2 are provided on the tool holder seat 2 for installing locking positioning screws 15. The tool holder seat 2 is locked and positioned with the external transmission rod 12 (the external transmission rod 12 is the transmission shaft of the feed transmission assembly, which is used for displacement feeding and transmitting cutting power) through the locking positioning screws 15. There is a cylindrical hole at the bottom of the end of the tool holder seat 2 for installing a transition joint 14, wherein an O-ring 13 is installed on the transition joint.

[0034] The tool assembly includes a blade, a blade fixing seat 7, a cutter disc 1, and a locking screw 9; the cutter disc 1 is fixedly connected to the handle seat 2 by the locking screw 9. The cutter disc 1 is symmetrically arranged in the circumferential direction and is provided with a slot. The blade includes a plurality of milling cutters 3, a bevel scraper 5, and a vertical cutter 6; the blade fixing seat 7 is installed in the inclined slot of the cutter disc 1 by a clamping screw; the milling cutter 3 is fixed to the blade fixing seat 7 by a plum blossom CNC screw 11, the bevel scraper 5 is fixedly installed in the vertical slot of the cutter disc 1 by a clamping screw, and the vertical cutter 6 is installed in the inclined slot of the cutter disc 1 by a clamping screw.

[0035] Specifically, the number of milling cutters 3 can be set according to actual needs and specific conditions. The setting principle is that the cutting force of the set number of milling cutters cannot cause the processed product to have abnormal conditions such as overall fracture and surface cracks, nor can it cause the fixture clamping to fail. At the same time, when the milling cutter 3 is installed, it can completely cut the entire circular surface without interference between the two adjacent blades, that is, the milling cutter 3 can be arranged in different positions in the diameter direction of the circular surface. The blade surface can be cut to a complete perfection to meet different processing needs. The setting principle of the bevel scraper 5 is the same as that of the milling cutter 3. The setting principle of the vertical scraper 6 is that the position of the tip of the vertical scraper 6 must be within the processing range of the milling cutter 3 and the bevel scraper 5 blades. The main function of the vertical scraper 6 is to pre-treat the material surface in advance, release the internal stress of the material, and reduce the temperature increase caused by the sudden release of stress due to the hardness and brittleness of the energetic material.

[0036] The three blades are arranged in a straight line along the diameter direction. For the milling cutter 3 and the bevel scraper 5, the blades can be arranged and combined to fully cover the radius of the cutter disc. The distance between two adjacent blades of each blade can be set according to the processing requirements, that is, the effective cutting amount when different blades are cutting at the same time can be controlled. When there is no overlap between the blades, the maximum cutting amount allowed by the energetic material can be achieved. The effective cutting amount can also be controlled by controlling the distance between the blades and the amount of overlapping parts to meet different cutting requirements.

[0037] The milling cutter 3, the vertical scraper 6 and the bevel scraper 5 can be quickly installed and fixed in the slot of the cutter disc 1. If any blade is worn, it can be disassembled and replaced independently without affecting other cutters.

[0038] When the composite cutter disc for processing energetic materials is used to process the end surface structure of energetic materials, the milling cutter 3, the vertical scratching cutter 6, and the bevel scraper 5 are used in combination and participate in the cutting process at the same time. The number and spacing of the blades installed in the diameter direction can be adjusted according to the diameter size of the energetic materials to be processed and recovered to achieve the effect of combined cutting. During combined cutting, the tip of the vertical scratching cutter 6 is the first to contact the material surface, followed by the milling cutter 3 and the bevel scraper 5. Because they are arranged in a straight line in the direction of the circle diameter, the blades partially overlap, but the function of processing the circular surface as a whole can still be completed. The blade located in the middle of the cutter disc 1 processes the end surface at the same time, and the middle blade is used to ensure a smooth transition when processing the end surface.

[0039] The tool assembly also includes a cover 8. The tool disc 1 is fixed to the tool handle seat 2 by means of a round hole positioning screw. The cover 8 is installed on the countersunk hole of the fixing screw to form a sealing protection to prevent material from entering the countersunk hole.

[0040] like Figure 3As shown, cooling pipelines are arranged inside the tool assembly and the handle assembly of the composite cutter disc, and the cooling pipelines include an inlet pipeline ①, a shunt pipeline ②, a main pipeline ③, and an outlet pipeline ④. The handle seat 2 is provided with an inlet pipeline ① and an outlet pipeline ④, and the cutter disc 1 is provided with a shunt pipeline ② and a main pipeline ③, and the main pipeline ③ is located directly below the blade; one end of the inlet pipeline ① in the handle seat 2 is connected to the inlet pipeline in the transmission rod 12, and the other end is connected to the shunt pipeline ②, and the shunt pipeline ② is connected to the main pipeline ③, and one end of the outlet pipeline ④ in the handle seat 2 is connected to the shunt pipeline ②, and the other end is connected to the outlet pipeline in the external transmission rod 12.

[0041] The shunt pipe is in contact with the cutter disc 1 as much as possible to ensure that each blade can be cooled by the cutter disc 1 through the cooling medium, so as to directly cool the tool installed on the cutter disc 1 and take away the temperature of the chips in contact with the cutter disc 1. The main pipe ③ and the shunt pipe ② are distributed up and down on the cutter disc 1 (see Figure 3 ), the pipe is blocked with a plug 10 in combination with curing glue at the point where the pipe contacts the external air, the main pipe ③ and the branch pipe ② are connected up and down through a transition hole, the end of the transition hole is blocked with a plug 10 in combination with curing glue, the main pipe ③ is arranged horizontally inside the cutter head 1, connected in the middle through a transition hole, and the end of the transition hole is blocked with a plug (10) in combination with curing glue to form a complete cooling circuit.

[0042] The cutter head 1 is fixed to the tool holder seat 2 by means of a round hole positioning screw locking method. At this time, the cooling pipeline in the tool holder seat 2 is connected to the cooling pipeline in the cutter head 1, and an O-type sealing ring 13 is provided to ensure the connectivity and sealing of the pipeline. The inlet pipeline ① and outlet pipeline ④ of the tool holder seat 2 are connected to the inlet cooling pipeline and outlet cooling pipeline of the transmission rod 12 through a transition joint 14, and an O-type sealing ring 13 is installed on the transition joint 14 to ensure the connectivity and sealing of the pipeline.

[0043] In this embodiment, the cooling medium in the cooling pipeline can be selected from low-temperature gas or liquid medium according to the characteristics of the energetic material being processed. The low-temperature gas is usually selected from liquid nitrogen or dry ice after being passed through a gasification device (about -190°C or -50°C), and the liquid medium is usually selected from treated low-temperature pure water (4-10°C), so as not to affect the characteristics of the energetic material and subsequent processing.

[0044] As another embodiment of the present invention, the three blades are used in the following ways: the milling cutter 3 is used alone, the bevel scraper 5 is used alone, the vertical scratching cutter 6 and the milling cutter 3 are used in combination, and the vertical scratching cutter 6 and the bevel scraper 5 are used in combination. When used in combination, the tip height of the vertical scratching cutter 6 is slightly higher than that of the milling cutter 3 and the bevel scraper 5, that is, when processing the surface of the energetic material, the vertical scratching cutter 6 first contacts the surface and pre-scrapes the surface to release the stress inside the surface. Then the milling cutter 3 performs cutting or the bevel scraper 5 performs secondary cutting. The blade of the milling cutter 3, the tip of the vertical scratching cutter 6, and the blade of the bevel scraper 5 are respectively on the same horizontal line; the combined processing method can achieve two to three times the maximum cutting depth of a single blade allowed by the current energetic material, and can ensure that the back cutting depth of the processing tool is the maximum allowable back cutting depth, thereby improving the end surface processing efficiency while ensuring the processing quality.

[0045] A temperature sensor 4 mounting hole is provided in the cutter disc 1, and a cylindrical PT100 temperature sensor 4 is used. During the actual processing, the temperature sensor 4 detects the temperature during the cutting process and is used to feed the temperature back to the control system of the energetic material cutting and recovery system to adjust and control the cutting speed, cutting amount, feed speed, and cooling medium flow rate. When the temperature reaches the warning value, except for continuing cooling, all other actions of the equipment are stopped and an alarm is issued, thereby effectively improving the safety and reliability of the cutting process.

Claims

1. A composite cutter disc for cutting and recycling energetic materials, the composite cutter disc comprising a cutter assembly and a handle assembly, characterized in that: The tool assembly is mounted on the tool handle assembly, and the tool handle assembly is mounted on the end of the feed transmission shaft. Cooling pipelines are arranged inside the tool assembly and the tool handle assembly to dissipate heat of various tools in the tool assembly during the cutting process.

2. The composite cutter head for energetic material cutting and recovery according to claim 1, characterized in that: The tool handle assembly comprises a tool handle seat; one end of the tool handle seat is fixedly connected to the tool assembly, and the other end of the tool handle seat is fixedly connected to the external transmission rod.

3. The composite cutter head for energetic material cutting and recovery according to claim 2, characterized in that: The tool assembly includes a blade, a cutter disc and a blade fixing seat; the blade includes a milling cutter, a bevel scraper and a vertical scratching cutter. The blade fixing seat 7 is fixedly installed on the cutter disc, and the milling cutter is fixed on the blade fixing seat. The blade of the milling cutter is parallel to the plane of the cutter disc; the bevel scraper and the vertical scratching cutter are fixedly installed in the cutter disc slot, the blade of the bevel scraper is parallel to the plane of the cutter disc, and the blade of the vertical scratching cutter is perpendicular to the plane of the cutter disc. The cutter disc is fixedly connected to the handle seat.

4. The composite cutter head for energetic material cutting and recovery according to claim 3, characterized in that: The cooling pipeline includes an inlet pipeline, a shunt pipeline, a main pipeline, and an outlet pipeline. The inlet pipeline and the outlet pipeline are arranged in the tool handle seat, and the shunt pipeline and the main pipeline are arranged on the cutter disc, and the main pipeline is located directly below the blade; one end of the inlet pipeline in the tool handle seat is connected to the inlet pipeline in the transmission rod, and the other end is connected to the shunt pipeline, and the shunt pipeline is connected to the main pipeline; one end of the outlet pipeline in the tool handle seat is connected to the shunt pipeline, and the other end is connected to the outlet pipeline in the external transmission rod.

5. The composite cutter head for energetic material cutting and recovery according to claim 4, characterized in that: An O-ring is provided at the connection between the cutter disc and the internal cooling pipeline of the cutter handle seat.

6. The composite cutter head for energetic material cutting and recovery according to claim 4, characterized in that: The inlet pipeline and outlet pipeline of the tool holder seat and the inlet cooling pipeline and outlet cooling pipeline of the transmission rod are connected through a transition joint, and an O-ring is installed on the transition joint to ensure the connectivity and sealing of the pipeline.

7. The composite cutter head for energetic material cutting and recovery according to claim 4, characterized in that: A sealing cover is arranged on the cutter disc, and the sealing cover covers the connecting piece between the cutter disc and the cutter handle seat to form a sealing protection.

8. The composite cutter head for energetic material cutting and recovery according to claim 3, characterized in that: A temperature sensor installation hole is provided in the cutter disc for installing the temperature sensor. During the actual processing, the temperature sensor will provide real-time feedback of the detected temperature.

9. The composite cutter head for energetic material cutting and recovery according to claim 6, characterized in that: The point where the pipeline contacts the external air is blocked with a plug in combination with curing glue, the end of the transition hole is blocked with a plug in combination with curing glue, the main pipelines are connected through transition holes, and the end of the transition hole is blocked with a plug in combination with curing glue to form a complete cooling circuit.

10. The composite cutter head for energetic material cutting and recovery according to claim 3, characterized in that: For milling cutters and bevel scrapers, the blades are arranged and combined to fully cover the radius of the cutter disc, and the distance between two adjacent blades of each blade is adjusted to control the effective cutting amount when different blades are cutting at the same time.

Images