Numerical control tool holder depth cutting device

Abstract

The application discloses a numerical control tool shank depth cutting machining device and relates to the technical field of numerical control tool shank machining.The numerical control tool shank depth cutting machining device comprises a cutting seat, a first screw rod is rotationally connected to the inner wall of the bottom end of the cutting seat, a moving table is arranged on the surface of the first screw rod, a clamping seat is arranged at the right end of the cutting seat, a positioning and stabilizing mechanism is arranged on the right side of the driving table, an adjusting assembly is arranged in the chamber of the left end of the cutting seat, a second deflection rod is rotationally connected to the end of the first deflection rod away from the stabilizing block, an extension rod is arranged on the side of the connecting end of the first deflection rod and the second deflection rod, and a cleaning and cooling assembly is arranged in the stabilizing block.The effective overhanging length of the cutting rod is divided into multiple short cantilever structures, the actual length-diameter ratio is reduced, the tool head flutter is reduced, obvious vibration marks are avoided on the cutting surface of the tool shank, the cutting temperature is reduced, the influence of thermal deformation on the cutting stability is reduced, the cutting process is always in a stable load range, and the damage of the tool is reduced.

Description

Technical Field

[0001] This invention relates to the field of CNC tool holder machining technology, specifically to a CNC tool holder deep cutting machining device. Background Technology

[0002] As a core connecting component between CNC machining equipment and cutting tools, CNC tool holders are widely used in high-end manufacturing fields such as aerospace, automotive manufacturing, and precision machining. Their machining accuracy, surface quality, and structural stability directly determine the cutting accuracy, tool life, and machining efficiency of CNC machine tools. As the manufacturing industry upgrades towards higher precision, higher efficiency, and greater variety, the machining requirements for CNC tool holders are becoming increasingly stringent.

[0003] However, when existing cutting equipment processes slender tool holders, the cutting force increases with the depth of cut due to the longer cutting tool. This causes vibration in the overhanging part of the tool, which leads to tool chatter. Chatter not only leaves obvious vibration marks on the cutting surface of the tool holder, but also aggravates tool wear and may even cause chipping.

[0004] To address the aforementioned issues, there is an urgent need for innovative design based on the existing CNC tool holder depth cutting machining device. Summary of the Invention

[0005] The purpose of this invention is to provide a CNC tool holder deep cutting machining device to solve the problem mentioned in the background art that tool chatter not only leaves obvious chatter marks on the cutting surface of the tool holder, but also aggravates tool wear and even causes chipping failure. The technical solution of this invention provides a solution that is significantly different from the existing technology, which is too simplistic.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a CNC tool holder deep cutting machining device, comprising a cutting seat, a first lead screw rotatably connected to the inner wall of the bottom end of the cutting seat, a movable stage threadedly connected to the surface of the first lead screw, a drive stage installed inside the movable stage via a second lead screw, a cutting rod installed at the output end of a motor built into the drive stage, a clamping seat installed at the right end inside the cutting seat, a positioning and stabilizing mechanism installed on the right side of the drive stage, and an adjustment component provided in the left end cavity inside the cutting seat; The positioning and stabilizing mechanism includes a stabilizing block sleeved on the surface of the cutting rod. At least two first grooves are evenly arranged around the outer sidewall of the stabilizing block. A first deflecting rod is rotatably connected to each of the first grooves. A second deflecting rod is rotatably connected to the end of the first deflecting rod away from the stabilizing block. A second groove is formed on the right side surface of the drive platform corresponding to the first groove. The end of the second deflecting rod away from the first deflecting rod is rotatably connected to the inner wall of the second groove. A telescopic rod is installed at the connection point between the first deflecting rod and the second deflecting rod. A cleaning and cooling component is installed inside the stabilizing block.

[0007] Preferably, the cleaning and cooling assembly includes a first gear fitted and fixed at the end of the first deflector rod away from the second deflector rod, a second gear rotatably connected in a first groove on one side of the first gear, a cam coaxially fixedly connected to the second gear, an abutment rod slidably provided in the first groove below the cam, the abutment rod slidably provided in a groove provided on the side wall of the first groove, a first spring fixedly connected to both sides of the bottom end of the abutment rod, the other end of the first spring connected to the inner wall of the groove below the cam, a push rod fixedly connected to the middle of the abutment rod, a fixed post fixedly connected to the left side surface of the stabilizing block, a nozzle provided at the end of the fixed post, the nozzle fitted and rotatably connected to the end of the fixed post, and the end of the push rod away from the abutment rod fitted and slidably connected in a groove opened at the top of the nozzle.

[0008] Preferably, the adjustment assembly includes a sliding rod fixedly connected to the inner wall of the left end cavity inside the cutting seat, a rotating rod disposed below the sliding rod, an adjusting block sleeved on the surface of the sliding rod, the end of the adjusting block away from the sliding rod sleeved on the surface of the rotating rod and rotatably connected to a drive wheel, a transmission wheel disposed below the drive wheel, a first oil tank disposed between the sliding rod and the rotating rod, the first oil tank being fixedly connected to the inner wall of the left side cavity of the cutting seat, a first piston rod being slidably connected inside the first oil tank, a second spring sleeved on the surface of the first piston rod, a second oil tank being fixedly connected to one side surface of the drive table, and a second piston rod being slidably connected inside the second oil tank.

[0009] Preferably, the first gear meshes with the second gear, and the end face of the cam abuts against the top of the abutment rod when the cam rotates.

[0010] Preferably, the drive wheel is sleeved on the surface of the rotating rod, and the drive wheel is laterally limited and slidable within a groove opened on the surface of the rotating rod.

[0011] Preferably, the left oil chamber of the first oil tank is connected to the left oil chamber of the second oil tank via an oil delivery hose, the output end of the first piston rod is fixedly connected to the right surface of the adjusting block, and the output end of the second piston rod is fixedly connected to the side surface of the telescopic rod near the drive platform.

[0012] Preferably, the transmission wheel is driven by a drive motor installed at the bottom of the cutting seat. The transmission wheel is configured as a frustum structure. When the drive wheel slides along the axial direction of the rotating rod, it always maintains close frictional contact with the transmission wheel. The surfaces of both the transmission wheel and the drive wheel are coated with rubber anti-slip material. A controller is installed on the front surface of the cutting seat.

[0013] Preferably, the right end of the rotating rod is fixedly connected to the right end of the first lead screw.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention comprises a first lead screw, a moving stage, a driving stage, a cutting rod, a stabilizing block, a first deflecting rod, and a second deflecting rod. During deep cutting, the stabilizing block abuts against the position to be cut, achieving initial positioning of the cutting position of the cutting rod. As the cutting rod gradually cuts into the slender tool holder, deep cutting begins. As the cutting depth increases, the stabilizing block moves backward synchronously along the surface of the cutting rod under the contact of the tool holder surface, dividing the effective overhang length of the cutting rod into two short cantilever structures, reducing the actual length-to-diameter ratio, reducing tool chatter at the source, avoiding leaving obvious chatter marks on the cutting surface of the tool holder, and improving the quality of the CNC tool holder.

[0015] 2. This invention comprises a first gear, a second gear, a cam, a contact rod, a push rod, a fixed column, and a nozzle. When the stabilizing block moves, it causes the first deflection rod on its periphery to deflect. The first gear at the right end of the stabilizing block meshes with the second gear in the groove of the stabilizing block, causing the cam to rotate. The rotating cam contacts the top of the contact rod, causing the contact rod to move left and right. This, in turn, causes the nozzle at the end of the fixed column to swing through the push rod, precisely and at multiple angles spraying the cutting fluid onto the surface of the cutting rod. On the one hand, this washes away the debris attached to the surface of the cutting rod, preventing debris accumulation from aggravating vibration. On the other hand, it can quickly conduct heat through the tool holder base, reducing the overall working temperature of the cutting rod to a certain extent and suppressing the thermal expansion and deformation of the tool holder caused by heat.

[0016] 3. This invention includes a sliding rod, a rotating rod, an adjusting block, a drive wheel, a transmission wheel, a first oil tank, a first piston rod, a second oil tank, and a second piston rod. During low-power cutting with a slender tool holder, as the cutting rod gradually cuts into the slender tool holder, the stabilizing block moves, pushing the second piston rod to move, squeezing the oil in the second oil tank, and transmitting it to the first oil tank through the oil circuit. This pushes the first piston rod to drive the adjusting block to fine-tune its position, changing the transmission relationship between the drive wheel and the transmission wheel, and thus fine-tuning the rotation speed of the rotating rod. This allows the feed speed of the moving table driven by the first lead screw to adapt to changes in the cutting depth, ensuring that the cutting process remains within a stable load range, further suppressing vibration and reducing tool damage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the surface of the drive stage of the present invention; Figure 5 For the present invention Figure 4Enlarged schematic diagram of the structure at point B; Figure 6 This is a schematic diagram of the adjusting block, drive wheel, and transmission wheel of the present invention; Figure 7 This is a schematic diagram of the first gear, second gear, and cam structure of the present invention.

[0018] In the diagram: 1. Cutting seat; 2. First lead screw; 3. Moving stage; 4. Drive stage; 5. Cutting rod; 6. Clamping seat; 71. Stabilizing block; 72. First deflection rod; 73. Second deflection rod; 74. Telescopic rod; 751. First gear; 752. Second gear; 753. Cam; 754. Abutting rod; 755. Push rod; 756. Fixed column; 757. Nozzle; 81. Sliding rod; 82. Rotating rod; 83. Adjusting block; 84. Drive wheel; 85. Transmission wheel; 86. First oil tank; 87. First piston rod; 88. Second oil tank; 89. Second piston rod; 9. Controller. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-7 This invention provides a technical solution for a CNC tool holder deep cutting machining device: A CNC tool holder deep cutting machining device includes a cutting seat 1, a first lead screw 2 rotatably connected to the inner wall of the bottom end of the cutting seat 1, a moving stage 3 threadedly connected to the surface of the first lead screw 2, a drive stage 4 installed in the moving stage 3 via a second lead screw, a cutting rod 5 installed at the output end of a motor built into the drive stage 4, a clamping seat 6 installed at the right end inside the cutting seat 1, a controller 9 installed on the front surface of the cutting seat 1, a positioning and stabilizing mechanism installed on the right side of the drive stage 4, and an adjustment component provided in the left end cavity inside the cutting seat 1. The tool holder is placed on the clamping seat 6 at the right end inside the cutting seat 1, and the clamping seat 6 is controlled by the controller 9 to complete the centering and clamping of the tool holder. The positioning and stabilizing mechanism includes a stabilizing block 71 sleeved on the surface of the cutting rod 5. At least two first grooves are evenly arranged around the outer side wall of the stabilizing block 71. A first deflecting rod 72 is rotatably connected to each of the first grooves. A second deflecting rod 73 is rotatably connected to the end of the first deflecting rod 72 away from the stabilizing block 71. A second groove is opened on the right side surface of the drive table 4 corresponding to the first groove. The end of the second deflecting rod 73 away from the first deflecting rod 72 is rotatably connected to the inner wall of the second groove. A telescopic rod 74 is installed at the connection point of the first deflecting rod 72 and the second deflecting rod 73. A cleaning and cooling component is installed inside the stabilizing block 71. A flexible bellows cover is provided on the inner wall of the first groove, forming a protective barrier on the outer wall of the first groove to isolate the gear from external cutting dust, coolant, and chips. The moving table 3 moves, driving the drive table 4 to feed radially. The stabilizing block 71 abuts against the position to be cut, playing a preliminary positioning role. Then, the cutting rod 5 gradually cuts into the slender CNC tool holder, starting deep cutting. It then abuts against the stabilizing block 71 and moves towards the drive table 4, driving the first deflection rod 72 and the second deflection rod 73 to gradually deflect, causing the telescopic rod 74 to gradually retract and gradually move towards the drive table 4.

[0021] In one embodiment of the present invention, the cooling and cleaning assembly includes a first gear 751 fitted and fixed at one end of a first deflector 72 away from the second deflector 73. A second gear 752 is rotatably connected in a first groove on one side of the first gear 751. A cam 753 is coaxially fixedly connected to the second gear 752. An abutment rod 754 is slidably disposed in the first groove below the cam 753. The abutment rod 754 is slidably disposed in a groove provided on the side wall of the first groove. A first spring is fixedly connected to both sides of the bottom end of the abutment rod 754. The other end is connected to the inner wall of the slide groove below the cam 753. A push rod 755 is fixedly connected to the middle of the abutment rod 754. A fixing post 756 is fixedly connected to the left side surface of the stabilizing block 71. A nozzle 757 is provided at the end of the fixing post 756. The nozzle 757 is rotatably connected to the end of the fixing post 756. The end of the push rod 755 away from the abutment rod 754 is slidably connected to the slide groove opened at the top of the nozzle 757. The first gear 751 and the second gear 752 mesh. When the cam 753 rotates, the end face abuts against the top of the abutment rod 754. The cutting rod 5 adopts existing technology and has a coolant channel inside. The coolant is sprayed directly into the cutter head through the channel to dissipate heat. At the same time, the first gear 751 at the right end of the first deflection rod 72 deflects, driving the second gear 752 in the groove of the stabilizing block 71 to rotate. The rotation of the second gear 752 drives the cam 753 to rotate. The rotation of the cam 753 will abut the top of the abutment rod 754, thereby driving the abutment rod 754 to move left and right. This, in turn, pushes the top of the nozzle 757 at the end of the fixed column 756 through the push rod 755. Because the middle of the nozzle 757 is... The fixed column 756 rotates and then swings, precisely and at multiple angles spraying cutting fluid onto the surface of the cutting rod 5. This cleans the debris adhering to the surface of the cutting rod 5 and rapidly conducts heat through the tool holder base, thus providing auxiliary cooling to the overall surface of the cutting rod to a certain extent. This suppresses the thermal expansion and deformation of the tool holder caused by heat. At the same time, it can also clean the debris that rushes out at the tool tip, preventing debris from adhering to the tool body. During the machining process, the tool body needs to feed towards the workpiece. Removing debris from the tool body can improve the stability of the fit between the tool body and the stabilizing block and reduce tool body wobbling.

[0022] In one embodiment of the present invention, the adjustment assembly includes a sliding rod 81 fixedly connected to the inner wall of the left end cavity of the cutting seat 1. A rotating rod 82 is disposed below the sliding rod 81. An adjusting block 83 is sleeved on the surface of the sliding rod 81. One end of the adjusting block 83 away from the sliding rod 81 is sleeved on the surface of the rotating rod 82 and is rotatably connected to a drive wheel 84. A transmission wheel 85 is disposed below the drive wheel 84. A first oil tank 86 is disposed between the sliding rod 81 and the rotating rod 82. The first oil tank 86 is fixedly connected to the inner wall of the left side cavity of the cutting seat 1. A first piston rod 87 is slidably connected inside the first oil tank 86. A second spring is sleeved on the surface of the first piston rod 87. A second oil tank 88 is fixedly connected to one side surface of the drive platform 4. A second piston is slidably connected inside the second oil tank 88. Rod 89 and drive wheel 84 are sleeved on the surface of rotating rod 82. Drive wheel 84 is located in the groove opened on the surface of rotating rod 82 and slides laterally. The oil chamber on the left side of the first oil tank 86 is connected to the oil chamber on the left side of the second oil tank 88 through an oil delivery hose. The output end of the first piston rod 87 is fixedly connected to the right side surface of the adjusting block 83. The output end of the second piston rod 89 is fixedly connected to the side surface of the telescopic rod 74 near the drive table 4. The transmission wheel 85 is driven by a drive motor installed at the bottom of the cutting seat 1. The transmission wheel 85 is set as a frustum structure. When the drive wheel 84 slides along the axial direction of rotating rod 82, it always maintains close frictional contact with the transmission wheel 85. The surfaces of the transmission wheel 85 and the drive wheel 84 are coated with rubber anti-slip material. The right end of rotating rod 82 is fixedly connected to the right end of first lead screw 2. The telescopic rod 74 moves to the left, pushing the second piston rod 89 to the left, squeezing the oil in the second oil tank 88, and transferring it to the first oil tank 86 through the oil delivery hose. This, in turn, pushes the first piston rod 87 to the right. The first piston rod 87 moves to the right, pushing the adjusting block 83 to the right. The adjusting block 83 moves to the right, causing the drive wheel 84 to move along the surface of the rotating rod 82. Since the transmission wheel 85 is a frustum design, the transmission ratio between the drive wheel 84 and the transmission wheel 85 is changed, and the rotation speed of the rotating rod 82 is finely adjusted so that the cutting process is always within a stable load range, reducing tool damage.

[0023] Working principle: First, the tool holder is placed on the clamping seat 6 at the right end of the cutting seat 1. The clamping seat 6 is controlled by the controller 9 to complete the centering and clamping of the tool holder. Then, the drive motor is started to drive the transmission wheel 85 to rotate. The rotation of the transmission wheel 85 drives the drive wheel 84 to rotate. The rotation of the drive wheel 84 drives the rotating rod 82 to rotate. The rotation of the rotating rod 82 drives the first lead screw 2 to rotate. The rotation of the first lead screw 2 drives the moving table 3 to move along the axial direction of the cutting seat 1. The movement of the moving table 3 drives the drive table 4 to feed radially. The stabilizing block 71 abuts against the position to be cut, playing a preliminary positioning role. Then, the cutting rod 5 gradually cuts into the slender CNC tool holder and begins deep cutting. It then moves against the stabilizing block 71 towards the drive table 4, driving the first deflection rod 72 and the second deflection rod 73 to gradually deflect, causing the telescopic rod 74 to gradually retract and gradually... The telescopic rod 74 moves towards the drive table 4, pushing the second piston rod 89 to move, squeezing the oil in the second oil tank 88, and transferring it to the first oil tank 86 through the oil delivery hose. This, in turn, pushes the first piston rod 87 to move. The first piston rod 87 pushes the adjusting block 83 to move axially. The axial movement of the adjusting block 83 drives the drive wheel 84 to move along the surface of the rotating rod 82. Since the transmission wheel 85 is a frustum design, the transmission ratio between the drive wheel 84 and the transmission wheel 85 is changed, and the rotation speed of the rotating rod 82 is finely adjusted. This reduces the feed speed of the first lead screw 2 driving the moving table 3, ensuring the stability of the subsequent cutting. Direct full feed entry can easily leave roughness, scratches, steps, and burrs on the workpiece surface. However, slow entry and gradual reduction of feed can make the cutting smoother and make the entry end clean and free of chipping.

[0024] As the first deflecting rod 72 deflects, the first gear 751 at the end of the first deflecting rod 72 away from the second deflecting rod 73 deflects accordingly, causing the second gear 752 in the first groove of the stabilizing block 71 to rotate. The rotation of the second gear 752 causes the cam 753 to rotate. The rotation of the cam 753 will abut the top of the abutting rod 754, thereby causing the abutting rod 754 to move back and forth. It will push the top of the nozzle 757 at the end of the fixed column 756 through the push rod 755. Since the middle part of the nozzle 757 is rotatably connected to the fixed column 756, it will swing, accurately and multi-anglely spraying the cutting fluid onto the surface of the cutting rod 5, effectively washing away the debris attached to the surface of the cutting rod 5, and quickly conducting heat dissipation through the tool holder base, which to a certain extent reduces the overall working temperature of the cutting rod and suppresses the thermal expansion and thermal deformation of the tool holder caused by heat.

[0025] To further illustrate the technical means and effects adopted by the present invention in order to achieve the intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structures, features and effects of the present invention.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A CNC tool holder depth cutting machining device, comprising a cutting seat (1), characterized in that: The cutting seat (1) is rotatably connected to the inner wall of the bottom end of the first lead screw (2), and the surface of the first lead screw (2) is threadedly connected to the moving stage (3). The moving stage (3) is equipped with a driving stage (4) through a second lead screw. The output end of the motor built into the driving stage (4) is equipped with a cutting rod (5). The right end of the cutting seat (1) is equipped with a clamping seat (6). The right side of the driving stage (4) is equipped with a positioning and stabilizing mechanism. The left end cavity of the cutting seat (1) is equipped with an adjustment component. The positioning and stabilizing mechanism includes a stabilizing block (71) sleeved on the surface of the cutting rod (5). At least two first grooves are evenly arranged around the outer side wall of the stabilizing block (71). A first deflection rod (72) is rotatably connected in each of the first grooves. A second deflection rod (73) is rotatably connected at the end of the first deflection rod (72) away from the stabilizing block (71). A second groove is opened on the right side surface of the drive table (4) corresponding to the first groove. The end of the second deflection rod (73) away from the first deflection rod (72) is rotatably connected to the inner wall of the second groove. A telescopic rod (74) is installed at the connection point between the first deflection rod (72) and the second deflection rod (73). A cleaning and cooling component is installed inside the stabilizing block (71).

2. The CNC tool holder depth cutting machining device according to claim 1, characterized in that: The cleaning and cooling assembly includes a first gear (751) fitted and fixed at one end of the first deflector rod (72) away from the second deflector rod (73). A second gear (752) is rotatably connected in a first groove on one side of the first gear (751). A cam (753) is coaxially fixedly connected to the second gear (752). An abutment rod (754) is slidably provided in the first groove below the cam (753). The abutment rod (754) is slidably provided in a groove provided on the side wall of the first groove. The bottom ends of the abutment rod (754) are fixed on both sides. A first spring is fixedly connected to the cam (753), and the other end of the first spring is connected to the inner wall of the groove below the cam (753). A push rod (755) is fixedly connected to the middle of the abutment rod (754). A fixed column (756) is fixedly connected to the left side surface of the stabilizing block (71). A nozzle (757) is provided at the end of the fixed column (756). The nozzle (757) is fitted and rotatably connected to the end of the fixed column (756). The end of the push rod (755) away from the abutment rod (754) is fitted and slidably connected to the groove opened at the top of the nozzle (757).

3. The CNC tool holder depth cutting machining device according to claim 2, characterized in that: The adjustment assembly includes a sliding rod (81) fixedly connected to the inner wall of the left end cavity of the cutting seat (1), a rotating rod (82) provided below the sliding rod (81), an adjustment block (83) sleeved on the surface of the sliding rod (81), the end of the adjustment block (83) away from the sliding rod (81) sleeved on the surface of the rotating rod (82), and a drive wheel (84) rotatably connected thereto. A transmission wheel (85) is provided below the drive wheel (84). A first oil tank (86) is provided between the sliding rod (81) and the rotating rod (82). The first oil tank (86) is fixedly connected to the inner wall of the left side cavity of the cutting seat (1). A first piston rod (87) is slidably connected inside the first oil tank (86). A second spring is sleeved on the surface of the first piston rod (87). A second oil tank (88) is fixedly connected to one side surface of the drive platform (4). A second piston rod (89) is slidably connected inside the second oil tank (88).

4. The CNC tool holder depth cutting machining device according to claim 2, characterized in that: The first gear (751) meshes with the second gear (752), and the end face of the cam (753) abuts against the top of the abutment rod (754) when the cam (753) rotates.

5. The CNC tool holder depth cutting machining device according to claim 3, characterized in that: The drive wheel (84) is sleeved on the surface of the rotating rod (82), and the drive wheel (84) is laterally limited and slides within the groove opened on the surface of the rotating rod (82).

6. The CNC tool holder depth cutting machining device according to claim 3, characterized in that: The left oil chamber of the first oil tank (86) is connected to the left oil chamber of the second oil tank (88) through an oil delivery hose. The output end of the first piston rod (87) is fixedly connected to the right surface of the adjusting block (83). The output end of the second piston rod (89) is fixedly connected to the side surface of the telescopic rod (74) near the drive platform (4).

7. The CNC tool holder depth cutting machining device according to claim 3, characterized in that: The transmission wheel (85) is driven by a drive motor installed at the bottom of the cutting seat (1). The transmission wheel (85) is configured as a frustum structure. When the drive wheel (84) slides along the axial direction of the rotating rod (82), it always maintains close frictional contact with the transmission wheel (85). The surfaces of the transmission wheel (85) and the drive wheel (84) are coated with rubber anti-slip material. A controller (9) is installed on the front surface of the cutting seat (1).

8. The CNC tool holder depth cutting machining device according to claim 3, characterized in that: The right end of the rotating rod (82) is fixedly connected to the right end of the first lead screw (2).

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