A tool for machining a conical bore

Abstract

The application discloses a cutter for machining a tapered hole and relates to the technical field of cutters. The cutter for machining a tapered hole is characterized by the following: an inner lining assembly is arranged in the cutter body; when the cutter body starts to perform a hole opening operation on a hole opening plane, the cutter body will vibrate; the rubber sleeve arranged in the cutter body can buffer and absorb the vibration and has a protection effect, thereby preventing resonance; the abutting piece and the connecting column arranged in the cutter body can improve the structural strength of the cutter body and the supporting effect from the inside to the outside, thereby preventing the cutter body from being bent or broken during hole opening; the service life of the cutter body is prolonged; the cutter body is matched with the cutting edge; the cutter can open a tapered hole with a certain precision; the generated metal scraps can be automatically discharged through the slag discharge groove; the cutter can prevent the problem of continuous rotation and biting of the cutter in the tapered hole; and the cutter has an auxiliary effect on improving the hole opening precision.

Description

Technical Field

[0001] This invention relates to the field of cutting tool technology, specifically to a cutting tool for machining tapered holes. Background Technology

[0002] The cutting tools for machining tapered holes are mainly divided into the following categories, and are selected according to the machining accuracy, efficiency and hole characteristics (such as through holes, blind holes, size), such as tapered reamers, tapered countersinks, and forming boring tools. Taking the tapered reamer as an example, it is the most specialized and commonly used tool for finishing tapered holes. Its cutting edge itself has a precise taper, which is used to ream pre-machined holes (such as holes after drilling and boring) to the final taper, size and surface finish.

[0003] Regarding the aforementioned technologies, it is believed that some cutting tools used for machining tapered holes currently lack chip removal structures. During hole drilling, metal chips accumulate between the reamer and the tapered hole wall. The metal chips squeeze the cutting edge, causing a "chipping" phenomenon. At the same time, the metal chips rub against the inside of the tapered hole wall, leading to problems such as "scratches" on the tapered hole surface, and even continuous friction and scratching, which can cause the tapered hole wall dimensions to exceed tolerances. Summary of the Invention

[0004] The purpose of this invention is to provide a cutting tool for machining tapered holes, thereby solving the problems mentioned in the background art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A cutting tool for machining tapered holes includes a tool body with an overall tapered shape. An internal liner assembly is installed inside the tool body to remove machining debris and improve the stability and structural strength of the tool body. A reinforcing assembly for pre-drilling the tapered hole is installed at the bottom end of the tool body. A deceleration assembly for reducing inertial impact after drilling is installed at the top of the outer wall of the tool body. A connecting shaft is installed on the top wall of the tool body, and a support is installed at the top of the connecting shaft. A positioning assembly for horizontal positioning of the tool body during drilling is installed on the outer wall of the support. A mounting shaft connected to a tool mounting device is fixedly installed on the top wall of the support.

[0007] Furthermore, the inner liner assembly includes a receiving cavity formed inside the cutter body. The receiving cavity is generally conical in shape, and a matching rubber sleeve for buffering, absorbing energy, and preventing resonance is installed on the inner wall of the receiving cavity. The rubber sleeve fits tightly against the inner wall of the receiving cavity.

[0008] Furthermore, the inner wall of the receiving cavity is vertically installed with a connecting column for bearing vertical forces. Several abutment members are uniformly installed vertically on the outer periphery of the connecting column to increase the strength of the internal support structure of the tool body. The abutment members are in the shape of a cross, and the end of the abutment member away from the connecting column passes through a rubber sleeve and abuts and fixes against the inner wall of the receiving cavity.

[0009] Furthermore, the outer wall of the tool body is uniformly provided with a number of slag discharge grooves, and the inner wall of each slag discharge groove is provided with a chamfer for placing the accumulation of machining debris. The outer wall of the tool body is uniformly provided with a number of cutting edges for drilling.

[0010] Furthermore, the reinforcing component includes a support column fixedly installed at the bottom end of the tool body. The support column is integrated with the tool body. A high-strength tool body with pre-drilled holes in contact with the material is fixedly installed on the bottom wall of the support column. A plurality of high-strength cutting edges with drive holes are evenly installed on the outer wall of the high-strength tool body. The high-strength cutting edges are all matched with the corresponding cutting edge positions and are interconnected.

[0011] Furthermore, a slag collection groove is provided at the bottom of the high-strength blade body and at the position between two adjacent high-strength blade bodies for collecting processing debris. A discharge groove is provided on the outer wall of both the high-strength blade body and the support column for discharging processing debris. An extension is provided at the bottom of the inner wall of the discharge groove to facilitate the smooth transfer of debris from the slag collection groove to the discharge groove. The slag collection groove, the discharge groove, and the slag discharge groove are interconnected. The bottom end of the high-strength blade body forms a cone shape with several cutting protrusions evenly installed on the outside. The cutting protrusions are used to preferentially contact the material and start rotating to open the hole.

[0012] Furthermore, the speed reduction assembly includes an upper collar fixedly mounted on the outside of the tool body, and a lower collar slidably mounted on the outer wall of the tool body below the upper collar for possible contact with material.

[0013] Furthermore, a buffer sleeve to reduce inertial impact is installed between the upper and lower collars in an inner-outer arrangement, and a number of buffer springs are evenly installed between the upper and lower collars and at positions corresponding to the buffer sleeve.

[0014] Furthermore, the positioning assembly includes a mounting sleeve that is rotatably mounted on the outer wall of the receiving seat via a low-friction bearing. The outer wall of the mounting sleeve is evenly provided with a plurality of mounting holes. The inner wall of the mounting holes is evenly provided with a plurality of positioning rods that are in contact with the material for horizontal positioning. Both ends of the positioning rods are fixedly mounted with contact seats.

[0015] Furthermore, a miniature level is installed on the top of the upper contact seat on the outer wall of the positioning rod, and a return spring is provided on the bottom wall of the upper contact seat and sleeved on the outer wall of the positioning rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This cutting tool for machining tapered holes, by installing an inner liner component inside the tool body, can buffer and protect against vibrations generated when the tool body begins drilling on the drilling plane by installing an internal rubber sleeve, preventing resonance. Simultaneously, the abutment and connecting post inside the tool body enhance the structural strength and internal support of the tool body from the inside out, preventing bending or breakage during drilling and extending the tool body's service life. Furthermore, when the cutting edge and tool body are properly matched, tapered holes with a certain precision can be drilled, and the generated metal chips are automatically removed through a slag removal groove, preventing scratches and other abrasions caused by continuous rotation within the tapered hole. All of these features contribute to improving drilling accuracy.

[0018] 2. The tool used for machining tapered holes features a reinforced component design. This design prioritizes the contact between the tool body and the hole-opening plane. The tool's rotation drives the high-strength cutting edge and cutting protrusion to pre-open a small hole, preventing slippage of the tool body during direct opening. This design also improves the accuracy of the hole-opening position. Simultaneously, metal debris generated during the opening process is continuously collected in the slag collection groove and then enters the discharge groove and slag removal groove through the extension section.

[0019] 3. The tool used for machining tapered holes has a positioning component. When the tool body is drilling, as the contact seat contacts the drilling plane, the positioning rod passes through the mounting hole and drives the return spring to stretch, which in turn drives the miniature level to move. The miniature level monitors the level of the drilling in real time, preventing deviation and tilting during drilling. The status is displayed to the operator by lighting up the indicator lights, which helps to improve drilling accuracy and forming effect.

[0020] 4. The cutting tool used for machining tapered holes is equipped with a speed reduction component. This component buffers and reduces the downward inertia and impact force generated during the penetration of the hole, preventing the cutting tool body from colliding with the hole surface and causing damage to the equipment. This provides a certain degree of protection for the entire device.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0024] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0025] Figure 2 This is an exploded view of the internal structure of the positioning component of the present invention;

[0026] Figure 3 This is an exploded view of the internal structure of the deceleration component of the present invention;

[0027] Figure 4 This is a schematic diagram of the external structure of the main body of the cutting tool of the present invention;

[0028] Figure 5 This is an exploded view of the internal structure of the liner component of the present invention;

[0029] Figure 6 This is a schematic diagram showing a partial connection between the reinforcing component and the inner lining component of the present invention;

[0030] Figure 7 This is a schematic diagram of the external structure of the reinforced component of the present invention. Figure 1 ;

[0031] Figure 8 This is a schematic diagram of the external structure of the reinforced component of the present invention. Figure 2 .

[0032] Illustrations: 1. Tool body; 2. Positioning assembly; 21. Mounting sleeve; 22. Mounting hole; 23. Positioning rod; 24. Contact seat; 25. Return spring; 26. Miniature level; 3. Receiver; 4. Mounting shaft; 5. Speed ​​reduction assembly; 51. Lower collar; 52. Buffer sleeve; 53. Buffer spring; 54. Upper collar; 6. Reinforcing assembly; 61. Support column; 62. Discharge groove; 63. Extension; 64. Slag collection groove; 65. High-strength cutting edge; 66. High-strength tool body; 67. Cutting protrusion; 7. Liner assembly; 71. Receiving cavity; 72. Slag discharge groove; 73. Cutting edge; 74. Chamfer 1; 75. Rubber sleeve; 76. Connecting column; 77. Abutment; 8. Connecting shaft. Detailed Implementation

[0033] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and 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 a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0035] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] Please see Figures 1-8 This invention provides a cutting tool for machining tapered holes, comprising a tapered tool body 1, an inner liner assembly 7 installed inside the tool body 1 to remove machining debris and improve the stability and structural strength of the tool body 1, a reinforcing assembly 6 installed at the bottom end of the tool body 1 for pre-drilling the tapered hole, a deceleration assembly 5 installed at the top of the outer wall of the tool body 1 to reduce the inertial impact of the tool body 1 after drilling, a connecting shaft 8 installed on the top wall of the tool body 1, a bearing seat 3 installed at the top end of the connecting shaft 8, a positioning assembly 2 installed on the outer wall of the bearing seat 3 for horizontal positioning of the tool body 1 during drilling, and a mounting shaft 4 fixedly installed on the top wall of the bearing seat 3 for connection with a tool mounting device.

[0037] In this implementation scheme, after the mounting shaft 4 is fitted with the electric drill, the entire tool body 1 is installed and fixed. The tool body 1 is driven by the electric drill to start the taper hole machining. After the reinforcing component 6 contacts the opening plane in advance, a small hole is generated. This mainly provides a pre-determination function for the opening position. Secondly, it can prevent the tool body 1 from slipping on the plane when rotating at high speed, prevent tool scratches on the opening plane, and gradually collect and remove the metal debris generated during the opening.

[0038] After the tool body 1 drives the inner liner assembly 7 into the opening plane, the vibration generated during the high-speed rotation of the opening is buffered and damped. At the same time, the structural strength of the entire tool body 1 is improved, which can extend the service life. It maintains a stable posture under continuous operation, reduces the probability of breakage and bending, and has a good protective effect on the tool body 1. It can also receive the generated metal chips and discharge them to the outside to achieve the function of automatic slag removal.

[0039] The speed reduction component 5 and the positioning component 2 are designed to withstand and support the impact force and inertia generated at the moment of the tapered hole penetration, preventing the top of the tool body 1 from colliding with the opening plane. The positioning component 2 is mainly used to limit the position of the tool body 1 during the opening process, and to promptly remind the operator to prevent misalignment and other problems when deviation occurs.

[0040] Specifically, the inner liner assembly 7 includes a receiving cavity 71 opened inside the cutter body 1. The receiving cavity 71 is generally conical in shape. A rubber sleeve 75 adapted to buffer energy absorption and prevent resonance is installed on the inner wall of the receiving cavity 71. The rubber sleeve 75 is tightly fitted to the inner wall of the receiving cavity 71.

[0041] In this embodiment, the inner cavity shape of the receiving cavity 71 is adapted to the tool body 1, and a rubber sleeve 75 is installed inside it to fit tightly against the inner wall of the receiving cavity 71. When the tool body 1 rotates at high speed, the vibration problem is buffered and absorbed, preventing the tool resonance.

[0042] Specifically, the inner wall of the receiving cavity 71 is vertically installed with a connecting column 76 for bearing vertical forces. Several abutment members 77 are evenly installed vertically on the outer periphery of the connecting column 76 to increase the strength of the internal support structure of the tool body 1. The abutment members 77 are in the shape of a cross. The end of the abutment member 77 away from the connecting column 76 passes through the rubber sleeve 75 and abuts and fixes against the inner wall of the receiving cavity 71.

[0043] In this embodiment, the connecting post 76 and the abutment member 77 installed inside the receiving cavity 71 abut and are fixed to the tool body 1. This is mainly to improve the internal structural strength of the tool body 1, reduce the occurrence of cracking and bending under continuous operation, help increase the service life of the tool body 1, and prevent stress concentration from causing the tool body 1 to break.

[0044] Specifically, the outer wall of the tool body 1 is evenly provided with several slag discharge grooves 72, the inner wall of each slag discharge groove 72 is provided with a chamfer 74 for placing the accumulation of machining debris, and several cutting edges 73 for hole drilling are evenly installed on the outer wall of the tool body 1.

[0045] In this embodiment, the tool body 1 rotates at high speed, driving the cutting edge 73 to gradually enter the opening plane to start the opening operation. The slag discharge groove 72 can receive the incoming metal chips and lift them out, thus achieving the function of automatic slag discharge.

[0046] Specifically, the reinforcing component 6 includes a support column 61 fixedly installed at the bottom of the tool body 1. The support column 61 is integrated with the tool body 1. A high-strength tool body 66 with pre-drilled holes in contact with the material is fixedly installed on the bottom wall of the support column 61. Several high-strength cutting edges 65 with drive holes are evenly installed on the outer wall of the high-strength tool body 66. The high-strength cutting edges 65 are all matched with the corresponding cutting edges 73 and are interconnected.

[0047] In this embodiment, when the tool body 1 rotates, it will drive the support column 61 and the high-strength tool body 66 to rotate continuously, thereby cooperating with the blade 73 to perform hole-opening work on the hole-opening plane. When the high-strength tool body 66 rotates, it will drive the cutting protrusion 67 to perform pre-hole opening work on the hole-opening plane, preventing the tool body 1 from directly contacting the plane and causing slippage.

[0048] Specifically, a slag collection groove 64 for collecting processing debris is provided at the bottom of the high-strength blade body 65 and at the position between two adjacent high-strength blade bodies 65. A discharge groove 62 for discharging processing debris is provided on the outer wall of both the high-strength blade body 65 and the support column 61. An extension 63 for smoothly transferring debris from the slag collection groove 64 to the discharge groove 62 is provided at the bottom of the inner wall of the discharge groove 62. The slag collection groove 64, the discharge groove 62 and the slag discharge groove 72 are interconnected. The bottom end of the high-strength blade body 65 forms a cone shape and several cutting protrusions 67 are evenly installed on the outside. The cutting protrusions 67 are used to preferentially contact the material and start rotating to open the hole.

[0049] In this embodiment, the metal shavings generated by the high-strength blade 65 during continuous rotation are collected by the slag collection trough 64 and then transported to the interior of the slag discharge trough 72 through the discharge trough 62 and the extension 63, thereby realizing the continuous output of metal shavings and completing the automatic slag discharge work.

[0050] Specifically, the speed reduction assembly 5 includes an upper collar 54 fixedly installed on the outside of the tool body 1, and a lower collar 51 slidably installed on the outer wall of the tool body 1 and below the upper collar 54 for possible contact with the material.

[0051] In this embodiment, the upper collar 54 is mainly used to limit the overall installation of the speed reduction component 5, and the lower collar 51 will slide up and down on the outer wall of the tool body 1 after being subjected to force.

[0052] Specifically, a buffer sleeve 52 for reducing inertial impact is installed between the upper collar 54 and the lower collar 51 in an internal and external arrangement, and a number of buffer springs 53 are evenly installed between the upper collar 54 and the lower collar 51 at positions corresponding to the buffer sleeve 52.

[0053] In this embodiment, after the lower collar 51 contacts the contact plane, it causes the buffer sleeve 52 and the buffer spring 53 to contract, which buffers and slows down the impact force and inertia generated at the moment of the tapered hole penetration, and prevents the top part of the tool body 1 from contacting the opening plane and causing collision damage.

[0054] Specifically, the positioning component 2 includes a mounting sleeve 21 that is rotatably mounted on the outer wall of the receiving seat 3 via a low-friction bearing. The outer wall of the mounting sleeve 21 is evenly provided with a plurality of mounting holes 22. The inner wall of the mounting holes 22 is evenly provided with a plurality of positioning rods 23 that are in contact with the material for horizontal positioning. Both ends of the positioning rods 23 are fixedly mounted with contact seats 24.

[0055] In this embodiment, the mounting sleeve 21 is rotatably mounted on the outer wall of the receiving seat 3 via a low-friction bearing. When the receiving seat 3 rotates at high speed, it avoids driving the mounting sleeve 21 to rotate continuously. When the tool body 1 has made a hole to a certain depth, the contact seat 24 contacts the hole plane. After being subjected to force, it will drive the positioning rod 23 to slide upward inside the mounting hole 22.

[0056] Specifically, a miniature level 26 is installed on the top of the upper contact seat 24 on the outer wall of the positioning rod 23, and a return spring 25 is provided on the bottom wall of the upper contact seat 24 and sleeved on the outer wall of the positioning rod 23.

[0057] In this embodiment, when the positioning rod 23 slides upward, it drives the contact seat 24 to stretch the return spring 25 and causes the miniature level 26 to move upward. The miniature level 26 monitors the horizontal state of the opening of the tool body 1 in real time and provides a bright light reminder to prevent the opening from shifting or misaligning. When the opening is being made, the front end is always in contact with the opening plane and remains vertical. As it gets closer to the expansion end of the tool body 1, the positioning component 2 monitors in real time to prevent tilting.

[0058] The working principle of this tool is as follows: When using the tool body 1, the movable positioning component 2 drives the receiving seat 3 and the mounting shaft 4 to be installed and connected with the external electric drill, thereby limiting and fixing the external mounting shaft 4 (the specific installation and limiting method is existing technology and will not be described in detail here). The electric drill drives the entire tool body 1 to start contacting the opening plane.

[0059] Pre-drilling positioning and slag removal: The high-strength blade 65 and cutting protrusion 67 at the bottom of the high-strength blade body 66 are preferentially contacted with the opening plane. When the electric drill drives the mounting shaft 4 to rotate the support seat 3 inside the mounting sleeve 21, the support seat 3, the tool body 1 and the reinforcing component 6 are rotated at high speed. After the cutting protrusion 67 contacts the opening plane, a small opening is formed, which positions the entire opening position and prevents the high-strength blade 65 from slipping or shifting. When the cutting protrusion 67 penetrates into the opening plane, it will drive the high-strength blade 65 to gradually contact the opening plane. As the high-strength blade 65 rotates continuously, the opening is continuously expanded. As the high-strength blade 65 penetrates deeper into the opening plane, metal debris will gradually enter the slag collection tank 64 and collect. As the debris increases, it enters the discharge tank 62 and the slag discharge tank 72 after passing through the extension 63.

[0060] Enlarging the opening and protecting the tool: After the high-strength cutting body 65 penetrates into the opening plane, the cutting edge 73 will take over the opening task and continue to contact the opening plane to perform rotating opening work. At the same time, the high-strength cutting body 66 drives the support column 61 to also penetrate into the opening plane. As the tool body 1 and the cutting edge 73 continue to penetrate, the tool body 1 will generate vibration when it rotates at high speed and contacts the opening plane. The rubber sleeve 75 installed inside the receiving cavity 71 will continuously buffer, dampen and protect after sensing the continuous vibration, preventing resonance. When the tool body 1 is working continuously, the connecting column 76 and the abutment 77 installed inside can support the inside of the tool body 1, improve the overall structural strength of the tool body 1, prevent breakage or bending, and have a good effect on improving the service life and overall strength of the tool body 1.

[0061] As the cutter body 1 rotates continuously, the metal chips generated will be discharged outward after passing through the slag collection groove 64, the extension 63, the discharge groove 62 and the slag discharge groove 72, thus achieving the effect of automatic material discharge during the hole opening process.

[0062] Hole-opening positioning to prevent deviation: During hole opening, a downward force is used to keep the tool body 1 close to the hole-opening plane and complete the hole-opening work. When the tool body 1 descends, it will drive the positioning component 2 to move downward, so that the contact seat 24 contacts the hole-opening plane. As the tool body 1 continues to descend, the contact seat 24 drives the positioning rod 23 to pass through the mounting hole 22 and then drive the miniature level 26 and the return spring 25 to move upward. The return spring 25 is initially stretched until the hole opening is completed. With the vertical positioning of multiple contact seats 24 and positioning rods 23, when the tool body 1 deviates during hole opening, the miniature level 26 will tilt and deviate. Then the miniature level 26 will light up a red light to remind the operator that the hole opening has deviated. This serves as a reminder to the operator of the status during hole opening and has an auxiliary effect on improving hole opening accuracy and forming effect.

[0063] After drilling, buffering and deceleration protection: When drilling, the operator usually applies a certain pressure to bring the tool body 1 close to the drilling plane. When drilling some through holes, the tool body 1 will have a sudden downward inertia at the moment of penetration. At this time, the lower collar 51 contacts the drilling plane, and at the same time, the buffer spring 53 and the buffer sleeve 52 are close to the position of the upper collar 54. The buffer sleeve 52 and the buffer spring 53 buffer and decelerate the generated inertial impact force to prevent the top of the tool body 1 from colliding with the drilling plane. This has a certain protective effect on the entire tool body 1 and the electric drill.

[0064] A speed reduction component 5 is installed on the outside of the tool body 1. It is mainly used to buffer and reduce the downward inertia and impact force generated at the moment of penetration when making a hole, so as to prevent the tool body 1 from colliding with the hole plane and causing damage to the equipment. It has a certain protective effect on the entire device.

[0065] The positioning component 2 set on the outside of the receiving seat 3 can continuously position the tapered hole with high precision requirements by continuously positioning it horizontally. This prevents the electric drill from driving the tool body 1 to shift during hole opening, thus avoiding the problem of hole misalignment. It has a good auxiliary effect on improving the accuracy of tapered hole opening and forming effect.

[0066] The inner liner assembly 7 installed inside the tool body 1 causes vibration when the hole is drilled, which puts great strain on the structural strength of the tool body 1, especially during long-term operation. Therefore, the rubber sleeve 75, connecting post 76 and abutment 77 are used to buffer the vibration and absorb energy to prevent resonance. At the same time, the connecting post 76 and abutment 77 provide strength support for the inside of the tool body 1, which is of great significance for improving the overall structure and vertical stress state of the tool body 1.

[0067] A reinforcing component 6 is installed at the bottom of the tool body 1. It is mainly used to pre-drill holes by rotating the tool body 1, leaving tiny holes on the drilling plane, so as to realize the continuous drilling work of the tool body 1. It has a good positive effect on determining the drilling position and preventing the tool body 1 from slipping or deviating. At the same time, the metal chips generated are collected by the slag collection tank 64 and then conveyed to the discharge tank 62 and the slag discharge tank 72 through the extension 63, thereby achieving the function of automatic slag discharge.

[0068] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cutting tool for machining tapered holes, comprising a tool body (1) with an overall tapered shape, characterized in that: The tool body (1) is equipped with an inner liner assembly (7) that can remove machining debris and improve the stability and structural strength of the tool body (1). The bottom end of the tool body (1) is equipped with a reinforcing assembly (6) for pre-drilling the tapered hole. The top of the outer wall of the tool body (1) is equipped with a deceleration assembly (5) to reduce the inertial impact of the tool body (1) after drilling. The top wall of the tool body (1) is equipped with a connecting shaft (8). The top of the connecting shaft (8) is equipped with a bearing seat (3). The outer wall of the bearing seat (3) is equipped with a positioning assembly (2) for horizontal positioning of the tool body (1) during drilling. The top wall of the bearing seat (3) is fixedly equipped with a mounting shaft (4) connected to the tool mounting equipment. The inner liner assembly (7) includes a receiving cavity (71) formed inside the cutter body (1). The receiving cavity (71) is generally conical in shape. A matching rubber sleeve (75) for buffering, absorbing energy, and preventing resonance is installed on the inner wall of the receiving cavity (71). The rubber sleeve (75) fits tightly against the inner wall of the receiving cavity (71). The inner wall of the receiving cavity (71) is vertically installed with a connecting column (76) for bearing vertical forces. A number of abutment pieces (77) for increasing the strength of the internal support structure of the tool body (1) are evenly installed vertically on the outer periphery of the connecting column (76). The abutment pieces (77) are in the shape of a cross. The end of the abutment piece (77) away from the connecting column (76) passes through the rubber sleeve (75) and abuts against and is fixed to the inner wall of the receiving cavity (71).

2. The cutting tool for machining tapered holes according to claim 1, characterized in that: The outer wall of the tool body (1) is uniformly provided with several slag discharge grooves (72), and the inner wall of each slag discharge groove (72) is provided with a chamfer (74) for placing the accumulation of processing debris. The outer wall of the tool body (1) is uniformly provided with several cutting edges (73) for drilling.

3. The cutting tool for machining tapered holes according to claim 1, characterized in that: The reinforcing component (6) includes a support column (61) fixedly installed at the bottom of the tool body (1). The support column (61) is integrated with the tool body (1). A high-strength tool body (66) with pre-drilled holes in contact with the material is fixedly installed on the bottom wall of the support column (61). A number of high-strength cutting edges (65) with drive holes are evenly installed on the outer wall of the high-strength tool body (66). The high-strength cutting edges (65) are all matched with the corresponding cutting edge (73) and are interconnected.

4. A cutting tool for machining tapered holes according to claim 3, characterized in that: The high-strength blade (65) has a slag collection groove (64) for collecting processing debris at the bottom and between two adjacent high-strength blades (65). The high-strength blade (65) and the outer wall of the support column (61) both have a discharge groove (62) for discharging processing debris. The bottom of the inner wall of the discharge groove (62) has an extension (63) for smoothly transferring debris from the slag collection groove (64) to the discharge groove (62). The slag collection groove (64), the discharge groove (62) and the slag discharge groove (72) are interconnected. The bottom of the high-strength blade (65) forms a cone shape and a number of cutting protrusions (67) are evenly installed on the outside. The cutting protrusions (67) are used to contact the material first and start rotating to open the hole.

5. A cutting tool for machining tapered holes according to claim 1, characterized in that: The speed reduction assembly (5) includes an upper collar (54) fixedly installed on the outside of the tool body (1), and a lower collar (51) for contacting the material is slidably installed on the outer wall of the tool body (1) and below the upper collar (54).

6. A cutting tool for machining tapered holes according to claim 5, characterized in that: A buffer sleeve (52) for reducing inertial impact is installed between the upper collar (54) and the lower collar (51) in an inner-outer arrangement. A number of buffer springs (53) are evenly installed between the upper collar (54) and the lower collar (51) and at positions corresponding to the buffer sleeve (52).

7. A cutting tool for machining tapered holes according to claim 1, characterized in that: The positioning component (2) includes a mounting sleeve (21) that is rotatably mounted on the outer wall of the receiving seat (3) via a low-friction bearing. The outer wall of the mounting sleeve (21) is evenly provided with a plurality of mounting holes (22). The inner wall of the mounting holes (22) is evenly provided with a plurality of positioning rods (23) that are in contact with the material for horizontal positioning. Both ends of the positioning rods (23) are fixedly mounted with contact seats (24).

8. A cutting tool for machining tapered holes according to claim 7, characterized in that: A miniature level (26) is installed on the top of the upper contact seat (24) on the outer wall of the positioning rod (23), and a return spring (25) is provided on the bottom wall of the upper contact seat (24) and sleeved on the outer wall of the positioning rod (23).

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