Self-guiding inner cooling chip removal deep hole machining drill

Abstract

The present application relates to the technical fields of deep hole machining, and particularly relates to a self-guiding inner cooling chip removal deep hole machining drill, which comprises a drill rod and a drill bit connected with each other, and the drill rod is hollow inside; a waste pipe is arranged inside the drill rod, and an annular channel is formed between the waste pipe and the drill rod, and the annular channel is used for passing cutting fluid; the waste pipe is used for passing cutting chips and cutting fluid, a spray suction port is arranged on the wall of the waste pipe, the spray suction port is communicated with the annular channel, and the spray suction port can spray cutting fluid into the waste pipe in a direction away from the drill bit; a liquid outlet is arranged on the side wall of the drill bit, and the liquid outlet is communicated with the annular channel; a waste port is arranged at the end of the drill bit, and the waste port is communicated with the waste pipe; and a cleaning mechanism is arranged inside the drill bit, and the cleaning mechanism is configured to clean the cutting chips blocking the waste pipe. Thus, the cutting fluid can pass through the waste pipe normally, and the cooling effect of the cutting fluid on the drill bit and the smooth discharge of the cutting chips are ensured simultaneously.

Description

Technical Field

[0001] This invention relates to the field of deep hole machining technology, and in particular to a self-guided internal cooling chip removal deep hole machining drill. Background Technology

[0002] Deep hole machining refers to the machining of holes with a large depth-to-diameter ratio. Due to the difficulty in chip removal, cooling and lubrication, and high dimensional accuracy requirements, deep hole machining typically employs specialized machine tools and special cutting tools.

[0003] In related technologies, such as Chinese patent CN215238037U, a hole-machining spray-suction drilling system is disclosed. This system includes a drill rod and a drill bit. An inner tube is installed inside the drill rod, forming an annular channel between the inner tube and the drill rod for the inflow of cutting fluid. The drill bit has an oil passage hole communicating with the annular channel. A return hole communicating with the inner tube is located at the end of the drill bit. A nozzle communicating with the annular channel is located on the inner tube. During use, cutting fluid is first introduced into the annular channel. A portion of the cutting fluid is sprayed into the machining hole through the oil passage hole, then flows in the reverse direction, simultaneously carrying chips through the return hole into the inner tube, and then exiting through the entire inner tube. Another portion of the cutting fluid is discharged backward through the nozzle, creating a negative pressure environment inside the inner tube. Simultaneously, a pressure difference is created on both sides of the return hole. This pressure difference improves the efficiency of the cutting fluid entering the inner tube through the return hole.

[0004] However, during continuous drilling operations, when the length of the chips generated in the machined hole is long, they are prone to clogging the inner tube, thereby hindering the normal flow of cutting fluid. This not only weakens the cooling effect of the cutting fluid on the drill bit, but also affects the smooth discharge of chips. Summary of the Invention

[0005] Therefore, it is necessary to provide a self-guided internal cooling chip removal deep hole drilling tool to address the problems of poor drill bit cooling and difficult chip removal in the current deep hole machining process.

[0006] The above objectives are achieved through the following technical solutions: A self-guided internally cooled chip-removing deep hole drilling tool includes a drill rod and a drill bit connected to each other. The drill rod is hollow inside. A scrap tube is provided inside the drill rod, and an annular channel is formed between the scrap tube and the drill rod for the passage of cutting fluid. The scrap tube allows chips and cutting fluid to pass through. A suction port is provided on the wall of the scrap tube, which is connected to the annular channel and can spray cutting fluid into the scrap tube at an angle away from the drill bit. A liquid outlet is provided on the side wall of the drill bit, which is connected to the annular channel. A scrap port is provided at the end of the drill bit, which is connected to the scrap tube. A cleaning mechanism is provided inside the drill bit, which is configured to clean the chips clogging the scrap tube.

[0007] Furthermore, the cleaning mechanism includes a support, on which a gas storage container and a base cylinder are mounted. The gas storage container stores a fixed amount of gas during use. The gas storage container and the base cylinder are connected, and a switch assembly is provided at the connection point. The switch assembly is configured to open or close the connection between the gas storage container and the base cylinder. A sliding tube is installed inside the base cylinder, and the sliding tube and the base cylinder together form an elastic telescopic structure. Multiple hinge rods are elastically hinged at the end of the sliding tube away from the support. Each hinge rod has a baffle at the end near the support. All hinge rods are fitted with a deformable part, which has a corresponding tube shape and annular plate shape before and after deformation. The hinge rods have corresponding first and second positions before and after rotation. In the first position, the hinge rod and the sliding tube are parallel, the deformable part is in the tube shape, the baffle is located inside the sliding tube, and all the baffles together form an annular structure or a closed structure. The closed structure divides the interior of the sliding tube laterally. In the second position, the hinge rod and the sliding tube are perpendicular, the deformable part is in the annular plate shape, and divides the interior of the waste tube laterally. The baffle is located outside the sliding tube.

[0008] Furthermore, the switch assembly includes a slide groove disposed on the base cylinder and extending radially; a block is slidably disposed within the slide groove, the block being connected to the bottom of the slide groove via a first elastic member, the block having a tendency to slide outward under the action of the first elastic member, the block having a through hole that can connect the gas storage container and the base cylinder; at least two slots are provided on the side wall of the slide groove, the two slots forming a group and arranged at intervals along the extension direction of the slide groove; a protrusion is inserted into the side wall of the block, the protrusion being able to slide in a direction perpendicular to the extension of the slide groove and being able to be inserted into the slot, and being connected to the block via a second elastic member, the protrusion having a tendency to extend out of the block under the action of the second elastic member.

[0009] Furthermore, the first elastic element is a first compression spring.

[0010] Furthermore, the second elastic element is a second compression spring.

[0011] Furthermore, an annular cavity is formed between the sliding tube and the base cylinder, and a third elastic element is provided inside the cavity. Under the action of the third elastic element, the elastic telescopic structure has a tendency to shorten.

[0012] Furthermore, the third elastic element is a third compression spring.

[0013] Furthermore, each hinge rod is connected to a sliding tube via a fourth elastic element. Under the action of the fourth elastic element, the hinge rod tends to rotate to be parallel to the sliding tube.

[0014] Furthermore, the fourth elastic element is a torsion spring.

[0015] Furthermore, the drill pipe and drill bit form a threaded connection.

[0016] The beneficial effects of this invention are: This invention relates to a self-guided internal cooling chip removal deep hole drilling tool. By setting up a cleaning mechanism and utilizing the characteristic of the cleaning mechanism to clean the chips blocking the waste pipe, the waste pipe is kept clear during the drilling operation, thereby ensuring that the cutting fluid can pass through the waste pipe normally, thus ensuring the cooling effect of the cutting fluid on the drill bit and the smooth discharge of chips. Attached Figure Description

[0017] Figure 1 A three-dimensional structural schematic diagram of a self-guided internal cooling chip removal deep hole drilling tool provided in an embodiment of the present invention; Figure 2 This is a front view schematic diagram of the self-guided internal cooling chip removal deep hole drilling tool provided in an embodiment of the present invention; Figure 3 This is a side view of the self-guided internal cooling chip removal deep hole drilling tool provided in an embodiment of the present invention. Figure 4 for Figure 3 A three-dimensional sectional view along the AA direction; Figure 5 for Figure 4 A magnified schematic diagram of the structure at point W in the middle; Figure 6 for Figure 4 A magnified schematic diagram of the structure at point X in the middle; Figure 7 A cross-sectional view of the self-guided internal cooling chip removal deep hole drilling tool provided in an embodiment of the present invention; Figure 8 for Figure 7 A magnified schematic diagram of the structure at point Y in the middle; Figure 9 for Figure 7 A magnified schematic diagram of the structure at point Z in the middle; Figure 10 This is an exploded view of a self-guided internal cooling chip removal deep hole drilling tool part provided in an embodiment of the present invention.

[0018] in: 1. Drill rod; 2. Drill bit; 201. Liquid outlet; 202. Waste outlet; 3. Waste pipe; 301. Spray nozzle; 4. Annular channel; 501. Support; 502. Gas storage container; 503. Base cylinder; 504. Switch assembly; 5041. Slide groove; 5042. Block; 50421. Through hole; 5043. First compression spring; 5044. Slot; 5045. Insert protrusion; 5046. Second compression spring; 505. Sliding tube; 506. Hinge rod; 5061. Baffle; 507. Deformation part; 6. Cavity; 7. Third compression spring; 8. Torsion spring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage," unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] The following reference Figures 1 to 10 The present invention describes a self-guided internal cooling chip removal deep hole drilling tool provided in the embodiments of the present invention, which is particularly suitable for deep hole machining.

[0023] Specifically, the self-guided internal cooling chip removal deep hole drilling tool is configured to include a drill rod 1 and a drill bit 2 connected to each other, wherein the drill bit 2 is located at the end of the drill rod 1, and the drill bit 2 and the drill rod 1 can rotate synchronously around their own axis, which facilitates drilling on the surface of the material (such as a wall).

[0024] The drill rod 1 is hollow inside to facilitate the installation of other components. A scrap pipe 3 is installed inside the drill rod 1, with its axis coinciding with the axis of the drill rod 1. The scrap pipe 3 and drill rod 1 are spaced apart circumferentially, forming an annular channel 4 between them, through which cutting fluid passes. The scrap pipe 3 allows for the passage of chips and cutting fluid. A suction nozzle 301 is installed on the wall of the scrap pipe 3, communicating with the annular channel 4 and facing the axis of the scrap pipe 3. The nozzle is inclined from the outside inwards, away from the drill bit 2, to facilitate the creation of a negative pressure environment inside the scrap pipe 3 when the cutting fluid passes through.

[0025] The drill bit 2 has a liquid outlet 201 on its side wall, which is connected to the annular channel 4. The drill bit 2 has a waste outlet 202 at its end, which is connected to the waste pipe 3.

[0026] During use, taking deep hole processing on a wall as an example, first align the drill bit 2 with the wall, then rotate the drill bit 2 and drill rod 1 while moving them closer to the wall to process a deep hole structure on the wall.

[0027] Simultaneously, cutting fluid is introduced into the annular channel 4. A portion of the cutting fluid is sprayed into the deep hole structure on the wall through the outlet 201 to cool and lubricate the drill bit 2. Subsequently, this portion of the cutting fluid flows in the reverse direction, simultaneously carrying the chips through the waste port 202 into the waste pipe 3, and then discharging through the entire waste pipe 3. Another portion of the cutting fluid is sprayed into the waste pipe 3 through the suction port 301. Guided by the suction port 301, the cutting fluid is sprayed into the waste pipe 3 at an angle away from the drill bit 2, creating a negative pressure environment inside the waste pipe 3 at the suction port 301. At this time, a pressure difference appears on both sides of the waste port 202. With the help of this pressure difference, the efficiency of the cutting fluid entering the waste pipe 3 through the waste port 202 is improved.

[0028] While the above process can achieve deep hole machining, when the length of the chips generated within the deep hole structure on the wall is relatively long, they are prone to clogging the scrap pipe 3. Once the scrap pipe 3 becomes clogged, it will directly block the flow path of the cutting fluid: on the one hand, the cutting fluid cannot continuously circulate smoothly through the scrap pipe 3, making it difficult for it to continuously reach the machining area of ​​the drill bit 2 to perform its cooling and lubrication functions, thus affecting the working condition of the drill bit 2; on the other hand, the clogged chips will create a flow obstruction, preventing subsequent chips from smoothly entering the scrap pipe 3 for discharge, further aggravating the clogging problem, forming a vicious cycle of "clogging - obstructed flow - cooling and lubrication failure - chip accumulation", ultimately adversely affecting the continuity and stability of deep hole machining.

[0029] Based on this, in the self-guided internal cooling chip removal deep hole drilling tool provided in this embodiment of the invention, a cleaning mechanism is provided inside the drill bit 2. The cleaning mechanism is configured to clean the chips blocking the waste pipe 3. Thus, during the drilling operation, the cleaning mechanism can be used to clean the chips blocking the waste pipe 3, ensuring the unobstructed flow of the waste pipe 3. The smooth flow of the waste pipe 3 provides a stable channel for the circulation of cutting fluid, allowing the cutting fluid to continuously reach the machining area of ​​the drill bit 2 through the annular channel 4 and the outlet 201, fully exerting its cooling and lubrication effects. At the same time, the cutting fluid can smoothly carry newly generated chips into the waste pipe 3 through the waste outlet 202 and quickly discharge along the waste pipe 3, fundamentally breaking the vicious cycle of "blockage-obstructed flow-cooling failure-chip accumulation," and simultaneously ensuring the cooling and lubrication effect of the cutting fluid and the continuity and stability of chip discharge during deep hole machining.

[0030] Specifically, the cleaning mechanism includes a support 501, which can be a cross-shaped hollow structure. All four ends are fixed to the end face of the drill bit 2 facing the drill rod 1 with screws for easy disassembly. The solid portion of the support 501 is extremely small, much smaller than the minimum cross-sectional area required for chip flow. The cross-shaped rib is thin, with a smooth surface, free of any protrusions, sharp corners, or grooves, preventing chip entanglement or sticking.

[0031] A gas storage container 502 and a base cylinder 503 are arranged opposite each other on the support 501. To facilitate the installation of the gas storage container 502, an installation groove is opened on the end face of the drill bit 2 facing the drill rod 1. The gas storage container 502 is located in the installation groove on the drill bit 2 during installation. The gas storage container 502 can be configured as a bottle-shaped structure with the bottle opening facing the waste pipe 3. When in use, it stores a certain amount of inert gas inside, so that a high pressure is formed inside. The axis of the base cylinder 503 coincides with the axis of the waste pipe 3. The gas storage container 502 and the base cylinder 503 are interconnected, and a switch assembly 504 is provided at the connection. The switch assembly 504 is configured to open or close the connection between the gas storage container 502 and the base cylinder 503.

[0032] The switch assembly 504 is configured to include a slide groove 5041, which is disposed on the base cylinder 503 and extends radially. Specifically, the slide groove 5041 is located on the top side wall of the base cylinder 503 and is positioned close to the support 501. A blocking block 5042 is slidably disposed within the slide groove 5041. The blocking block 5042 is connected to the bottom of the slide groove 5041 via a first elastic member. Under the action of the first elastic member, the blocking block 5042 has a tendency to slide outward. The first elastic member can specifically be configured as a first compression spring 5043, which is inserted into the slide groove 5041 during installation. The first compression spring 5043 and the slide groove 5041 extend in the same direction. The blocking block 5042 has a through hole 50421, which can connect the gas storage container 502 and the base cylinder 503. Initially, the blocking block 5042 is located on the outside, and the through hole 50421 is misaligned with the gas storage container 502 and the base cylinder 503, and there is no connection between the gas storage container 502 and the base cylinder 503. Subsequently, when the blocking block 5042 is located on the inside, the through hole 50421 connects the gas storage container 502 and the base cylinder 503. At least two slots 5044 are provided on the side wall of the slide groove 5041. The two slots 5044 form a group and are arranged at intervals along the extension direction of the slide groove 5041. A protrusion 5045 is inserted into the side wall of the block 5042. The protrusion 5045 can slide in a direction perpendicular to the extension of the slide groove 5041 and can be inserted into the slot 5044. It is connected to the block 5042 through a second elastic member. Under the action of the second elastic member, the protrusion 5045 has a tendency to extend out of the block 5042. The second elastic member can be specifically set as a second compression spring 5046 and extends in a direction perpendicular to the extension of the slide groove 5041.

[0033] Preferably, the groove walls of the two slots 5044 in the same group that are close to each other are inclined surfaces, and the two inclined surfaces form a figure-eight structure with the larger opening facing the block 5042; the insertion protrusion 5045 consists of two parts, one part being a cylinder and the other part being a sphere, and the virtual center of the sphere part coincides with the virtual center of one end face of the cylinder part, and the sphere part can form a sliding fit with the inclined surface to improve the smoothness of the insertion protrusion 5045 when inserting and removing it from the slot 5044; the number of slots 5044 can be set to four, and the four slots 5044 are divided into two groups, and the two groups of slots 5044 are respectively set on two opposite groove side walls of the slide groove 5041 along the axis of the base cylinder 503, and are correspondingly set along the axial direction; the number of insertion protrusions 5045 is set to two, and they are respectively inserted into two opposite side walls of the block 5042 along the axis of the base cylinder 503, and can be inserted into the corresponding two slots 5044 in the two groups of slots 5044 respectively.

[0034] A sliding tube 505 is provided inside the base cylinder 503, and the axis of the sliding tube 505 coincides with the axis of the base cylinder 503. The sliding tube 505 and the base cylinder 503 together form an elastic telescopic structure. To achieve the elastic telescopic connection between the sliding tube 505 and the base cylinder 503, an annular cavity 6 is formed between the sliding tube 505 and the base cylinder 503. A third elastic element is provided in the cavity 6. Under the action of the third elastic element, the elastic telescopic structure has a tendency to shorten. The third elastic element is specifically a third compression spring 7, which is inserted into the cavity 6.

[0035] Multiple hinge rods 506 are elastically hinged at the end of the sliding tube 505 away from the support 501. These hinge rods 506 are evenly arranged circumferentially along the sliding tube 505. Initially, the hinge rods 506 and the sliding tube 505 are parallel. To achieve elastic hinge between the sliding tube 505 and the hinge rods 506, each hinge rod 506 is connected to the sliding tube 505 via a fourth elastic element. Under the action of the fourth elastic element, the hinge rod 506 tends to rotate to become parallel to the sliding tube 505. Specifically, the fourth elastic element can be a torsion spring 8. Each hinge rod 506 has a baffle 5061 near the support 501. The baffle 5061 is perpendicular to the hinge rod 506 and is designed as a fan-shaped structure, allowing multiple baffles 5061 to be spliced ​​to form a ring-shaped plate structure or a disc-shaped closed structure. All hinge rods 506 are fitted with a deformable part 507, which has a corresponding tubular shape and a ring plate shape before and after deformation. The hinge rod 506 has a first position and a second position before and after rotation. Initially, the hinge rod 506 is in the first position, such as... Figure 5 As shown, the hinge rod 506 is parallel to the sliding tube 505, the deformable part 507 is tubular and approximately coaxial with the sliding tube 505, the baffle 5061 is located inside the sliding tube 505, and all the baffles 5061 together form a ring structure, which approximately closes the end opening of the base cylinder 503; the hinge rod 506 is in the second position, as shown. Figure 8 As shown, the hinge rod 506 is perpendicular to the sliding tube 505, the deformable part 507 is deformed into a ring plate shape, and it divides the inside of the waste tube 3 in the transverse direction. The baffle 5061 is located outside the sliding tube 505.

[0036] During use, when chips clog the waste pipe 3 and are located on the side of the suction port 301 away from the support 501, the chips nearly block the interior of the waste pipe 3 laterally. Due to the obstruction of the chips, the cutting fluid entering from both the waste port 202 and the suction port 301 cannot continue to flow. As the cutting fluid continuously enters the waste pipe 3, the liquid inside gradually increases due to the obstruction of the chips, and the liquid pressure gradually increases. This liquid pressure simultaneously acts on the block 5042, forming a first thrust. This first thrust tends to move the block 5042 inward along the slide groove 5041. Simultaneously, the block 5042 receives a second thrust from the first compression spring 5043. This second thrust tends to move the block 5042 outward along the slide groove 5041. Since the first thrust is less than the second thrust, the block 5042 remains stationary. As the liquid pressure inside the waste pipe 3 gradually increases, the first thrust gradually increases. When the first thrust is greater than the second thrust, under the combined force, the block 5042 moves inward along the slide groove 5041, the first compression spring 5043 is compressed synchronously, and the insertion protrusion 5045 then disengages from the outer slot 5044 of the same group and inserts back into the block 5042. The second compression spring 5046 is compressed synchronously. When the block 5042 moves to the bottom stop of the slide groove 5041, the insertion protrusion 5045 and the inner slot 5044 of the same group are inserted. The through hole 50421 connects the gas storage container 502 and the base cylinder 503. The high-pressure gas in the gas storage container 502 then enters the base cylinder 503 through the through hole 50421 and then acts on the annular structure formed by the baffle 5061, synchronously driving the sliding tube 505 to accelerate outward. The third compression spring 7 is compressed synchronously.

[0037] When the moving speed of the sliding tube 505 exceeds the flow speed of the cutting fluid in the scrap tube 3, the kinetic energy of the sliding tube 505 is converted into the liquid pressure energy of the cutting fluid inside the deformable part 507, resulting in a liquid pressure difference between the cutting fluid inside and outside the deformable part 507, with the liquid pressure inside the deformable part 507 being greater than the liquid pressure outside the deformable part 507. Under the action of the pressure difference, the deformable part 507 opens outward and transforms from a tube shape to a ring plate shape. The deformable part 507 in the ring plate shape divides the interior of the scrap tube 3 laterally. During the deformation process of the deformable part 507, it simultaneously drives the hinge rod 506 to rotate from the first position to the second position. The baffle 5061 rotates synchronously with the hinge rod 506, so that it no longer blocks the air outlet of the sliding tube 505. At this time, the air outlet of the sliding tube 505 helps to push the chips blocking the scrap tube 3 to move, and the torsion spring 8 stores force synchronously. Since the baffle 5061 no longer blocks the air outlet of the sliding tube 505, the sliding tube 505 decelerates under the action of the third compression spring 7. As the sliding tube 505 continues to move, it can guide the cutting fluid in the scrap tube 3 to flow away from the drill bit 2, avoiding backflow and affecting the cooling effect of the drill bit 2. It can also push the chips blocking the scrap tube 3 to move synchronously, so that the chips blocking the scrap tube 3 can be pushed to the outlet on the scrap tube 3, and the chips blocking the scrap tube 3 can be drawn away by the negative pressure at the outlet.

[0038] After the chips blocking the waste pipe 3 are removed, the deformable part 507 is no longer blocked by the chips from the waste pipe 3. Under the action of the torsion spring 8, the hinge rod 506 rotates from the second position to the first position to achieve reset. When the hinge rod 506 rotates, it simultaneously drives the deformable part 507 to retract inward and deform from the ring plate shape to the tube shape to achieve reset. As the deformable part 507 resets, the liquid pressure of the cutting fluid in the waste pipe 3 gradually decreases. Under the action of the first compression spring 5043, the block 5042 gradually resets. Then, under the action of the second compression spring 5046, the insertion protrusion 5045 is reinserted into the same set of inner slots 5044 to achieve reset.

[0039] When chips clog the scrap tube 3 and are located near the support 501 at the nozzle 301, the chips nearly block the interior of the scrap tube 3 laterally. Due to the blockage, the cutting fluid entering from the nozzle 301 can flow normally, while the cutting fluid entering from the scrap port 202 cannot continue to flow. As the cutting fluid continuously enters the scrap tube 3 through the scrap port 202, the liquid inside the scrap tube 3 gradually increases due to the obstruction of the chips, and the liquid pressure gradually increases, repeating the above process. The difference is that the liquid pressure outside the deformed part 507 at this time mainly comes from... A small portion of the cutting fluid enters the waste pipe 3 through the suction port 301. This portion of the cutting fluid has a relatively low liquid pressure. With the gas output from the gas storage container 502 remaining constant (i.e., the thrust of the gas through the annular structure formed by the baffle 5061 on the sliding pipe 505 remains constant), the acceleration of the sliding pipe 505 changes consistently. Therefore, to achieve the same pressure difference as the inner and outer sides of the aforementioned deformable section 507, the sliding pipe 505 needs to reach a lower speed. Consequently, the deformable section 507 can open earlier, thereby improving chip removal efficiency and conserving gas in the gas storage container 502. After the deformable section 507 opens, as the sliding pipe 505 continues to move, a negative pressure is formed between the deformable section 507 and the chips, thereby removing the chips clogging the waste pipe 3.

[0040] In other embodiments, the drill rod 1 and the drill bit 2 are threaded together, which facilitates quick replacement of the drill bit 2.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A self-guided internal cooling chip removal deep hole drilling tool, characterized in that, The self-guided internal cooling chip removal deep hole drilling tool includes a drill rod (1) and a drill bit (2) connected to each other. The drill rod (1) is hollow inside. A scrap tube (3) is provided inside the drill rod (1), and an annular channel (4) is formed between the scrap tube (3) and the drill rod (1). The annular channel (4) is for the passage of cutting fluid. The scrap tube (3) is for the passage of chips and cutting fluid. A suction port (301) is provided on the wall of the scrap tube (3). The suction port (301) and the annular channel (301) are connected. 4) Connected and able to spray cutting fluid into the waste pipe (3) at an angle away from the drill bit (2); the drill bit (2) has an outlet (201) on its side wall, and the outlet (201) is connected to the annular channel (4); the drill bit (2) has a waste port (202) at its end, and the waste port (202) is connected to the waste pipe (3); the drill bit (2) has a cleaning mechanism inside, which is configured to clean the chips that block the waste pipe (3).

2. The self-guided internal cooling chip removal deep hole drilling tool according to claim 1, characterized in that, The cleaning mechanism includes a support (501), on which a gas storage container (502) and a base cylinder (503) are mounted. The gas storage container (502) stores a fixed amount of gas during use. The gas storage container (502) and the base cylinder (503) are connected, and a switch assembly (504) is provided at the connection point. The switch assembly (504) is configured to open or close the connection between the gas storage container (502) and the base cylinder (503). A sliding tube (505) is provided inside the base cylinder (503), and the sliding tube (505) and the base cylinder (503) together form an elastic telescopic structure. Multiple hinge rods (506) are elastically hinged at the end of the sliding tube (505) away from the support (501). Each hinge rod (506) has a baffle (5061) at the end near the support (501). The hinge rod (506) is fitted with a deformable part (507). The deformable part (507) has a corresponding tube shape and a ring plate shape before and after deformation. The hinge rod (506) has a corresponding first position and a second position before and after rotation. When it is in the first position, the hinge rod (506) and the sliding tube (505) are parallel, the deformable part (507) is in the shape of a tube, and the baffle (5061) is located inside the sliding tube (505). All the baffles (5061) together form a ring structure or a closed structure. The closed structure separates the inside of the sliding tube (505) in the transverse direction. When it is in the second position, the hinge rod (506) and the sliding tube (505) are perpendicular, the deformable part (507) is in the shape of a ring plate, and separates the inside of the waste tube (3) in the transverse direction. The baffle (5061) is located outside the sliding tube (505).

3. The self-guided internal cooling chip removal deep hole drilling tool according to claim 2, characterized in that, The switch assembly (504) includes a slide groove (5041), which is disposed on the base cylinder (503) and extends radially; a block (5042) is slidably disposed in the slide groove (5041), the block (5042) is connected to the bottom of the slide groove (5041) through a first elastic member, and under the action of the first elastic member, the block (5042) has a tendency to slide outward; a through hole (50421) is provided on the block (5042), which can connect the gas storage container (502) and the base cylinder (503); the slide groove ( At least two slots (5044) are provided on the side wall of the groove of the slide (5041). The two slots (5044) are a group and are arranged at intervals along the extension direction of the slide (5041). A protrusion (5045) is inserted into the side wall of the block (5042). The protrusion (5045) can slide in a direction perpendicular to the extension of the slide (5041) and can be inserted into the slot (5044). It is connected to the block (5042) through a second elastic member. Under the action of the second elastic member, the protrusion (5045) has a tendency to extend out of the block (5042).

4. The self-guided internal cooling chip removal deep hole drilling tool according to claim 3, characterized in that, The first elastic element is the first compression spring (5043).

5. The self-guided internal cooling chip removal deep hole drilling tool according to claim 3, characterized in that, The second elastic element is the second compression spring (5046).

6. The self-guided internal cooling chip removal deep hole drilling tool according to claim 2, characterized in that, An annular cavity (6) is formed between the sliding tube (505) and the base tube (503). A third elastic element is provided in the cavity (6). Under the action of the third elastic element, the elastic telescopic structure has a tendency to shorten.

7. The self-guided internal cooling chip removal deep hole drilling tool according to claim 6, characterized in that, The third elastic element is the third compression spring (7).

8. The self-guided internal cooling chip removal deep hole drilling tool according to claim 2, characterized in that, Each hinge rod (506) is connected to a fourth elastic element and a sliding tube (505) respectively. Under the action of the fourth elastic element, the hinge rod (506) tends to rotate to be parallel to the sliding tube (505).

9. The self-guided internal cooling chip removal deep hole drilling tool according to claim 8, characterized in that, The fourth elastic element is a torsion spring (8).

10. The self-guided internal cooling chip removal deep hole drilling tool according to claim 1, characterized in that, The drill rod (1) and the drill bit (2) form a threaded connection.

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