Ultra-long tool support frame for high-precision machine tool

Abstract

The application discloses a kind of ultra-long knife support frame of high-precision machine tool, including support sleeve, processing long cutter, cutter support frame and support frame driving device, support sleeve is rotatably arranged on the side of machine tool auxiliary main shaft along the length direction of machine tool auxiliary main shaft, processing long cutter is located on the same side of machine tool auxiliary main shaft with support sleeve, processing long cutter is located at the end away from machine tool positive main shaft, the processing long cutter is used to process deep hole in the end of workpiece inserted into support sleeve, cutter support frame is arranged on machine tool auxiliary main shaft, and the support frame driving device is installed on machine tool auxiliary main shaft, for driving cutter support frame moves along the length direction of machine tool auxiliary main shaft core shaft.The present application can directly process deep hole on workpiece by machine tool, so that machine tool completes the machining of workpiece as a whole by clamping workpiece once, support sleeve is used to support workpiece, cutter support frame is used to support processing long cutter, the swing of workpiece and processing long cutter is smaller during machining, and the precision of workpiece is improved.

Description

Technical Field

[0001] This invention relates to an extra-long tool support for high-precision machine tools, belonging to the field of machine tool accessories technology. Background Technology

[0002] The full name of the Swiss-type lathe is Swiss-type CNC lathe, which can also be called a spindle box moving type CNC automatic lathe, economic milling and turning composite machine tool or longitudinal cutting lathe. It is a precision machining equipment. The Swiss-type lathe can complete composite machining such as turning, milling, drilling, boring, tapping and engraving at the same time. It is mainly used for batch processing of precision hardware, shaft-type non-standard parts and other workpieces. Some workpieces require deep holes to be machined at their ends. Currently, machine tools used for various machining operations, including Swiss-type lathes, have drill bits mounted on a column located between the main spindle and the sub-spindle. The drill bit remains stationary; the machine spindle clamps the workpiece and drives it to rotate and feed towards the drill bit, which then machines the hole. However, because the drill bit's position on the column is fixed, the distance between the drill bit and the machine spindle is limited, thus affecting the distance the spindle can drive the workpiece to feed. Therefore, deep holes cannot be machined on the workpiece. For example, machining a 400mm deep hole is impossible with existing machine tools and requires a specialized drilling machine. When machining deep holes, after the workpiece has completed all machining except for drilling the deep hole, it is transferred to a specialized drilling machine to complete the deep hole machining. This method of using a special machine to machine deep holes not only increases the cost of the equipment, but also requires the workpiece to be clamped at least twice, reducing the machining efficiency of the workpiece and increasing labor costs. Due to the multiple clamping, it is difficult to improve the machining accuracy of the workpiece. For example, if a long drilling tool is set on one side of the machine tool's sub-spindle, and the machine tool's main spindle clamps the workpiece through the movable guide sleeve on the column, and the long tool on the other side of the column performs the drilling, the workpiece and the tool may swing during drilling because the workpiece itself is long and the tool is also long, which affects the machining accuracy of the workpiece and is also prone to tool breakage. Summary of the Invention

[0003] The purpose of this invention is to provide an extra-long tool support for a high-precision machine tool, which solves the technical defects of existing Swiss-type lathes in that they cannot machine deep holes on workpieces and have low machining accuracy for deep holes, resulting in low workpiece machining efficiency.

[0004] To solve the above problems, the technical solution adopted by the present invention is: an ultra-long tool support for a high-precision machine tool, comprising a support sleeve, a long machining tool, a tool support frame, and a support frame drive device. The support sleeve is rotatably disposed on one side of the machine tool sub-spindle along its length direction and is driven to rotate by the machine tool sub-spindle. In use, the support sleeve is coaxial with the machine tool main spindle. The workpiece, which is clamped and driven to rotate and be axially fed by the machine tool main spindle, extends into the support sleeve and rotates synchronously with it. The long machining tool is located on the same side of the machine tool sub-spindle as the support sleeve, and the long machining tool is located away from the machine tool main spindle. At one end of the shaft, the cutting tip is positioned facing the support sleeve and extends into the support sleeve. This long machining tool is used to machine the end of the workpiece that extends into the support sleeve. The tool support frame is located on the side of the machine tool sub-spindle where the long machining tool is mounted, and it can move along the length of the sub-spindle mandrel. The tool support frame has a through hole for the long machining tool to pass through. After passing through the through hole, the long machining tool extends into the support sleeve. The tool support frame is used to support the long machining tool and prevent it from swinging. The support frame drive device is used to drive the tool support frame to move along the length of the sub-spindle mandrel. This invention features a support sleeve and a long machining tool mounted on the sub-spindle of a machine tool. The workpiece, held by the machine spindle, passes through the support sleeve and is supported by it. The long machining tool then machines a deep hole in the workpiece. Because the long machining tool is mounted on the sub-spindle, compared to existing technologies where drilling tools are mounted on a column between the main spindle and the sub-spindle, the distance between the long machining tool and the main spindle is greater in this invention. Therefore, machining tools of different lengths can be used. The main spindle then drives the workpiece to rotate and feed, achieving deep hole machining at the workpiece end. Since deep hole machining is performed directly on a Swiss-type lathe, which can also perform other machining operations on the workpiece, this invention allows for different machining operations to be performed with a single clamping of the workpiece on the Swiss-type lathe. This eliminates the need for a separate dedicated machine for deep hole machining, reducing workpiece machining costs and minimizing the number of workpiece clamping operations. While improving workpiece processing efficiency, this invention reduces manual labor input, improves workpiece processing accuracy, and enhances workpiece processing quality. The support sleeve in this invention supports the workpiece during processing, preventing workpiece swaying during machining due to the large distance between the machine tool spindle holding the workpiece and the long cutting tool. This improves the accuracy of deep hole machining. Furthermore, the absence of relative rotation between the workpiece and the support sleeve prevents wear on the workpiece surface caused by rotation relative to the support sleeve, further improving machining accuracy. The tool support frame in this invention supports the tool from the center, preventing swaying of the long cutting tool due to workpiece rotation during deep hole machining, which would further reduce machining accuracy. The support frame drive device can be adjusted according to the feed position during workpiece machining, avoiding obstruction of workpiece feed.

[0005] As a further improvement of the present invention, it also includes a sensor bracket and a sensor. The sensor bracket is mounted on the machine tool sub-spindle, and the sensor is mounted on the sensor bracket, located on the side of the long cutting tool away from the machine tool main spindle. It is used to detect the workpiece. When the workpiece is fed to the point where it extends out of the support sleeve, the sensor detects the workpiece and sends a signal to the control system. The control system then controls the tool support to move away from the machine tool main spindle. After the workpiece is processed and retracted into the support sleeve, the control system controls the tool support to move back towards the machine tool main spindle. This invention detects the workpiece feed position using a sensor. Detecting the workpiece and moving the tool support away from it does not obstruct further workpiece feed. After the workpiece retracts, the tool support resets to facilitate the processing of the next workpiece.

[0006] As a further improvement of the present invention, a slider bracket is also included. The slider bracket is slidably mounted on the machine tool subspindle and is driven to slide horizontally by a support frame drive device. One end of the tool support frame is fixed to the slider bracket, and a through hole is formed on the other end of the tool support frame. By providing a sliding bracket, the present invention facilitates the sliding installation of the tool support frame on the machine tool subspindle through the sliding mounting of the sliding bracket and the machine tool subspindle.

[0007] As a further improvement of the present invention, it also includes a guide rail and a slider. The guide rail is detachably mounted on the machine tool sub-spindle and is parallel to the machining long tool. The slider is disposed on the guide rail and can slide on the guide rail. A slider bracket is mounted on the slider, and the sliding of the slider on the guide rail drives the tool support frame to move horizontally. The present invention, through the sliding cooperation between the guide rail and the slider, allows the slider mounting bracket to be slidably mounted on the machine tool sub-spindle, resulting in smooth sliding and good guiding performance.

[0008] As a further improvement of the present invention, the support frame drive device is a cylinder. The cylinder body is mounted on the machine tool sub-spindle, the piston rod of the cylinder is parallel to the machining long tool, and the end of the piston rod is connected to the slider support. The extension and retraction of the cylinder piston rod drives the slider support to move. The present invention drives the movement of the slider support by the extension and retraction of the cylinder piston rod.

[0009] As a further improvement of the present invention, it also includes a gun drill holder, which is mounted on the machine tool subspindle. A long machining tool is mounted on the gun drill holder, and the cylinder body is mounted on the side of the gun drill holder away from the machine tool subspindle. The gun drill holder in this invention facilitates both the installation of long machining tools and the installation of the cylinder.

[0010] As a further improvement of the present invention, it also includes a rear cylinder support and a front cylinder support. The rear cylinder support is mounted on the drill bit holder, the cylinder body is mounted on the drill bit holder by the rear cylinder support, and the front cylinder support is mounted on the slider support. The piston rod of the cylinder is connected to the slider support by the front cylinder support. By providing the rear cylinder support and the front cylinder support, the present invention facilitates both the installation of the cylinder body on the drill bit holder and the connection of the cylinder piston rod to the slider support.

[0011] As a further improvement of the present invention, a mounting base is also included. The mounting base is fixed to one side of the machine tool sub-spindle, and a mounting cavity communicating with the machine tool sub-spindle is provided on the mounting base. The support sleeve is rotatably mounted on the mounting base, and a driven gear is mounted on the support sleeve. A driving gear is mounted on the spindle of the machine tool sub-spindle, and the driven gear meshes with the driving gear. The present invention provides a mounting base for mounting the support sleeve, facilitating the installation of the support sleeve. The present invention drives the support sleeve to rotate through gear transmission from the spindle of the machine tool sub-spindle.

[0012] As a further improvement of the present invention, a transition gear is also included. The transition gear is installed in the mounting cavity, and the driving gear and driven gear are located on both sides of the transition gear and mesh with it. By setting the transition gear, the present invention makes the structure more compact and ensures that the support sleeve rotates at the same speed and in the same direction as the machine tool sub-spindle, which facilitates the synchronous control of the rotation of the support sleeve and the workpiece.

[0013] As a further improvement of the present invention, the sensor bracket is mounted on the side of the mounting base away from the machine tool spindle, and the sensor bracket is positioned above the machining long tool. The sensor bracket in this invention, positioned above the machining long tool, effectively prevents interference from the sensor with the workpiece during deep hole drilling or tapping.

[0014] In summary, the beneficial effects of this invention are as follows: This invention allows a machine tool to directly machine deep holes into a workpiece, enabling the machine tool to complete the overall machining of the workpiece in a single clamping operation, reducing manual labor input. Furthermore, when machining deep holes at the end of the workpiece, the support sleeve supports the workpiece, while the tool support frame supports the long machining tool. During the machining process, the radial oscillation of the workpiece and the long machining tool is minimal, thereby improving the efficiency and accuracy of drilling or tapping deep holes into the workpiece. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram illustrating the structure of the support sleeve installation in this invention.

[0017] Figure 3This is a three-dimensional structural diagram of the present invention in use.

[0018] The components are: 1. Support sleeve; 2. Machine tool sub-spindle; 3. Machine tool main spindle; 4. Workpiece; 5. Machining long tool; 6. Tool support frame; 7. Support frame drive device; 8. Sensor bracket; 9. Sensor; 10. Slider bracket; 11. Guide rail; 12. Slider; 13. Cylinder front bracket; 14. Mounting seat; 15. Driven gear; 16. Driving gear; 17. Transition gear; 18. Gun drill base; 19. Cylinder rear bracket; 20. Column. Detailed Implementation

[0019] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0020] like Figure 1 and Figure 3 The high-precision machine tool's extra-long tool support frame shown includes a support sleeve 1, a long machining tool 5, a tool support frame 6, and a support frame drive device 7. In this invention, the support sleeve 1 is rotatably mounted on one side of the machine tool's sub-spindle 2 along its length and is driven to rotate by the sub-spindle 2. In use, the support sleeve 1 is coaxial with the machine tool's main spindle 3. The workpiece 4, clamped and driven to rotate and be axially fed by the main spindle 3, extends into the support sleeve 1 and rotates synchronously with it. The long machining tool 5 is located on the same side of the machine tool's sub-spindle 2 as the support sleeve 1, with its tip facing the support sleeve 1 and extending towards the support sleeve. The long cutting tool 5 is used to machine a deep hole at the end of the workpiece 4 that extends into the support sleeve 1 or to tap a thread in the deep hole at the end of the workpiece 4. The tool support frame 6 is set on the side of the machine tool sub-spindle 2 where the long cutting tool 5 is mounted, and can move along the length direction of the spindle of the machine tool sub-spindle 2. The tool support frame 6 has a through hole for the long cutting tool 5 to pass through. After the long cutting tool 5 passes through the through hole, it extends toward the support sleeve 1. The tool support frame 6 is used to support the long cutting tool 5 and prevent the long cutting tool 5 from swinging. The support frame drive device 7 is set on the side of the machine tool sub-spindle 2 where the long cutting tool 5 is mounted, and is used to drive the tool support frame 6 to move along the length direction of the spindle of the machine tool sub-spindle 2.

[0021] like Figure 2As shown, the specific structure of the present invention for driving the machine tool sub-spindle 2 to rotate the support sleeve 1 is as follows: The present invention is provided with a mounting base 14, which is detachably mounted to one side of the machine tool sub-spindle 2 by bolts, and a mounting cavity communicating with the machine tool sub-spindle 2 is opened on the mounting base 14. The support sleeve 1 is rotatably mounted on the mounting base 14 by two bearings, and the two ends of the support sleeve 1 extend from the two ends of the mounting base 14 respectively. A driven gear 15 is installed on the support sleeve 1 between the two bearings, and the driven gear 15 rotates with the support sleeve 1. In this invention, a drive gear 16 is mounted on the spindle of the machine tool sub-spindle 2, and a driven gear 15 meshes with the drive gear 16. Optimally, an intermediate gear 17 is provided, which is installed within the mounting cavity. The drive gear 16 and driven gear 15 are located on opposite sides of the intermediate gear 17 and both mesh with it. The rotation of the spindle of the machine tool sub-spindle 2 drives the drive gear 16 to rotate, which in turn drives the driven gear 15 through the intermediate gear 17, thereby driving the support sleeve 1 to rotate. Because the rotation speed and direction of the support sleeve 1 are the same as those of the workpiece 4, there is no relative rotation between the support sleeve 1 and the workpiece 4 during use. The workpiece 4 only moves axially relative to the support sleeve 1 under the drive of the machine tool main spindle 3, avoiding wear on the surface of the workpiece 4 caused by relative rotation between the workpiece 4 and the support sleeve 1, thus improving the surface quality of the workpiece 4.

[0022] like Figure 1 and Figure 3 As shown, to facilitate the control of the movement of the tool support 6, the present invention is provided with a sensor bracket 8 and a sensor 9. The sensor bracket 8 is mounted on the machine tool sub-spindle 2. The sensor bracket 8 in the present invention is L-shaped, and its vertical part is detachably mounted on the mounting base 14 by two bolts. The sensor 9 is mounted on the vertical part of the sensor bracket 8, and the sensor 9 is located on the side of the end of the long tool 5 away from the machine tool main spindle 3. It is used to detect whether the workpiece 4 extends out of the support sleeve 1. When the workpiece 4 is fed to the state of extending out of the support sleeve 1, the sensor 9 detects the workpiece 4 and sends a signal to the control system of the machine tool. The control system controls the tool support 6 to move away from the machine tool main spindle 3 to avoid the workpiece 4, so that the workpiece 4 can continue to feed and drill. After the workpiece 4 is processed, it is driven by the machine tool main spindle 3 to retract into the support sleeve 1. At this time, the machine tool main spindle 3 sends a signal to the control system, and the control system controls the tool support 6 to move back to the direction of the machine tool main spindle 3.

[0023] like Figure 1 and Figure 3As shown, to facilitate the installation of the tool support bracket 6, the present invention provides a slider bracket 10. The slider bracket 10 is slidably mounted on the machine tool sub-spindle 2 and is driven to slide horizontally by the support bracket drive device 7. One end of the tool support bracket 6 is fixed on the slider bracket 10, and a through hole is opened on the other end of the tool support bracket 6. The specific structure of the present invention for the sliding installation of the slider bracket 10 and the machine tool sub-spindle 2 is as follows: The present invention provides a guide rail 11 and a slider 12. The guide rail 11 is detachably mounted on the machine tool sub-spindle 2 by multiple bolts, and the guide rail 11 is parallel to the machining long tool 5. The slider 12 is set on the guide rail 11 and can slide on the guide rail 11. The slider bracket 10 is detachably mounted on the slider 12 by bolts. The sliding of the slider 12 on the guide rail 11 drives the tool support bracket 6 to move horizontally. In this invention, the preferred choice for the support frame drive device 7 is a cylinder. The cylinder body is mounted on the machine tool sub-spindle 2, the piston rod of the cylinder is parallel to the machining long tool 5, and the end of the piston rod is connected to the slider bracket 10. The extension and retraction of the cylinder piston rod drives the slider bracket 10 to move. After the sensor 9 detects that the workpiece 4 has extended out of the support sleeve 1, it sends a signal to the machine tool control system. The control system controls the piston rod of the cylinder to retract, pulling the tool support frame 6 away from the workpiece. After the workpiece 4 has been drilled for deep hole or tapped, the machine tool main spindle 3 pulls the workpiece away from the machine tool sub-spindle 2 until it enters the support sleeve 1. Then, the machine tool main spindle 3 sends a signal to the machine tool control system to control the piston rod of the cylinder to extend, pushing the tool support frame 6 back to its original position. The connection method and control method between the sensor 9 and the machine tool control system in this invention are existing technologies and will not be described in detail here.

[0024] The support frame drive device 7 in this invention can also be a servo motor. The servo motor is installed on one side of the machine tool sub-spindle 2. The output shaft of the servo motor is connected to a lead screw. The lead screw passes through the slider bracket 10 and is threadedly engaged with the slider bracket 10. After the sensor 9 detects that the workpiece 4 extends out of the support sleeve 1, it sends a signal to the machine tool control system. The control system controls the servo motor to rotate forward, pulling the tool support frame 6 away from the workpiece. After the workpiece 4 has completed drilling a deep hole or tapping, the machine tool main spindle 3 pulls the workpiece away from the machine tool sub-spindle 2 and moves it into the support sleeve 1. Then, the machine tool main spindle 3 sends a signal to the machine tool control system to control the servo motor to rotate in reverse, pushing the tool support frame 6 back to its original position.

[0025] like Figure 1 and Figure 3As shown, to facilitate the installation of the long cutting tool 5, the present invention has a gun drill holder 18 mounted on the machine tool sub-spindle 2. The gun drill holder 18 is mounted on the side of the machine tool sub-spindle 2 where the support sleeve 1 is mounted. The long cutting tool 5 is detachably mounted on the gun drill holder 18 with bolts. The cylinder body is mounted on the side of the gun drill holder 18 away from the machine tool sub-spindle 2. The present invention optimally provides a cylinder rear support 19 and a cylinder front support 13. The cylinder rear support 19 is mounted on the gun drill holder 18, and the cylinder body is mounted on the gun drill holder 18 by the cylinder rear support 19. The cylinder retainer 12 in the present invention is L-shaped, and one side of it is detachably mounted on the gun drill holder 18 with bolts. The cylinder body is detachably mounted on the other side of the cylinder rear support 19. The cylinder front support 13 is mounted on the slider support 10, and the piston rod of the cylinder is connected to the slider support 10 by the cylinder front support 13. The cylinder front support 13 and the cylinder rear support 19 have the same shape.

[0026] In use, the workpiece 4 is clamped by the machine tool spindle 3. After passing through the movable guide sleeve on the column 20 located between the machine tool spindle 3 and the machine tool sub-spindle 2, the workpiece 4 extends to one side of the machine tool sub-spindle 2, and the end of the workpiece 4 is aligned with the support sleeve 1, so that the machining long tool 5 abuts against the end of the workpiece 4. While the machine tool spindle 3 drives the workpiece 4 to rotate and feed towards the machine tool sub-spindle 2, the machine tool sub-spindle 2 drives the support sleeve 1 to rotate in the same direction and at the same speed as the workpiece 4. When the workpiece 4 is inside the support sleeve 1, there is no relative rotation between the workpiece 4 and the support sleeve 1, avoiding damage to the surface of the workpiece 4 due to the relative rotation between the support sleeve 1 and the workpiece 4. As the workpiece 4 is fed, the depth of the machined hole increases due to wear on the surface. When the workpiece extends from the end of the support sleeve 1 away from the machine tool spindle 3, the sensor 9 detects the workpiece 4. At this time, the piston rod of the cylinder retracts, pulling the tool support 6 to move away from the machine tool spindle 3 to avoid the workpiece 4. After the depth of drilling or tapping on the workpiece 4 reaches the required depth, the machine tool spindle 3 drives the workpiece 4 to slowly exit from the support sleeve 1. When the end of the workpiece 4 retracts into the support sleeve 1, the sensor 9 can no longer detect the workpiece 4. At this time, the piston rod of the cylinder extends and pushes the tool support 6 to move towards the machine tool spindle 3 and reset. In this invention, the tool support bracket 6 supports the long tool 5 from the middle of the workpiece 4 at the beginning of the drilling or tapping of the long tool 5, effectively avoiding the swing caused by the excessive length of the long tool 5. The support sleeve 1 and the movable guide sleeve on the machine tool column 20 support the workpiece 4, improving the machining accuracy of drilling or tapping the end of the workpiece 4.

[0027] To accommodate deep hole machining at the ends of workpieces 4 with different diameters, this invention includes a detachable clamp (not shown in the figure) inside the support sleeve 1. By replacing the clamp, this invention can be adapted to machine deep holes at the ends of workpieces with different diameters, improving its versatility. Specifically, the support sleeve 1 can have a radially threaded hole, and a fixing bolt can be installed in the threaded hole. The clamp is fixed to the support sleeve 1 by the end of the fixing bolt abutting against the clamp. In this invention, the outer diameter of the clamp can be set to be equal to or slightly smaller than the inner diameter of the support sleeve 1 to facilitate clamp replacement. This invention can be equipped with various clamps with different inner diameters to meet the needs of workpieces 4 with different diameters, wherein the outer diameter of the clamps is always equal, and the clamps are made of metal tubing.

[0028] Unless otherwise specified in the above description, all parts are prior art, or can be implemented using existing technology. Furthermore, the specific embodiments described in this invention are merely preferred embodiments and are not intended to limit the scope of this invention. That is, all equivalent changes and modifications made to the content of the claims of this invention should be considered within the technical scope of this invention.

Claims

1. An extra-long tool support for a high-precision machine tool, characterized in that: include Support sleeve (1) is rotatably disposed on one side of the machine tool sub-spindle (2) along the length direction of the machine tool sub-spindle (2) and driven to rotate by the machine tool sub-spindle (2). When in use, the support sleeve (1) is coaxial with the machine tool main spindle (3). The workpiece (4) clamped and driven to rotate and be axially fed by the machine tool main spindle (3) extends into the support sleeve (1), and the workpiece (4) rotates in the same direction and at the same speed as the support sleeve (1). The machining long tool (5) and the support sleeve (1) are located on the same side of the machine tool sub-spindle (2). The machining long tool (5) is located at one end away from the machine tool main spindle (3), with its tip facing the support sleeve (1) and extending into the support sleeve (1). The machining long tool (5) is used to machine the end of the workpiece (4) that extends into the support sleeve (1). The tool support frame (6) is set on one side of the machine tool sub-spindle (2) where the long cutting tool (5) is installed, and can move along the length of the spindle of the machine tool sub-spindle (2). The tool support frame (6) has a through hole for the long cutting tool (5) to pass through. After the long cutting tool (5) passes through the through hole, it extends toward the support sleeve (1). The tool support frame (6) is used to support the long cutting tool (5) and prevent the long cutting tool (5) from swinging. Support frame drive device (7), which is used to drive the tool support frame (6) to move along the length direction of the spindle of the machine tool sub-spindle (2); Sensor bracket (8) is mounted on the machine tool sub-spindle (2); Sensor (9) is mounted on sensor bracket (8) and located on one side of the machining long tool (5) away from the machine tool spindle (3) for detecting workpiece (4). The slider bracket (10) is slidably mounted on the machine tool sub-spindle (2) and driven to slide horizontally by the support frame drive device (7). One end of the tool support frame (6) is fixed on the slider bracket (10), and the through hole is opened on the other end of the tool support frame (6). The guide rail (11) is detachably mounted on the machine tool sub-spindle (2) and is parallel to the machining long tool (5); The slider (12) is set on the guide rail (11) and can slide on the guide rail (11). The slider bracket (10) is installed on the slider (12). The sliding of the slider (12) on the guide rail (11) drives the tool support frame (6) to move horizontally. Mounting seat (14) is fixed to one side of the machine tool sub-spindle (2), and the mounting seat (14) has a mounting cavity communicating with the machine tool sub-spindle (2). The support sleeve (1) is rotatably mounted on the mounting seat (14). The driven gear (15) is mounted on the support sleeve (1), and the driving gear (16) is mounted on the spindle of the machine tool sub-spindle (2). The driven gear (15) meshes with the driving gear (16). When the workpiece (4) is fed to the state of extending out of the support sleeve (1), the sensor (9) detects the workpiece (4) and sends a signal to the control system of the machine tool, and controls the tool support (6) to move away from the main spindle (3) of the machine tool through the control system; After the workpiece (4) is processed and retreated into the support sleeve (1), the tool support frame (6) is moved and reset in the direction of the machine tool spindle (3) by the control system.

2. The extra-long tool support for a high-precision machine tool according to claim 1, characterized in that: The support frame drive device (7) is a cylinder. The cylinder body is mounted on the machine tool sub-spindle (2). The piston rod of the cylinder is parallel to the machining long tool (5), and the end of the piston rod of the cylinder is connected to the slider bracket (10). The extension and retraction of the cylinder piston rod drives the slider bracket (10) to move.

3. The extra-long tool support for a high-precision machine tool according to claim 2, characterized in that: Also includes Gun drill holder (18) is mounted on the machine tool sub-spindle (2). The machining long tool (5) is mounted on the gun drill holder (18). The cylinder body of the cylinder is mounted on the side of the gun drill holder (18) away from the machine tool sub-spindle (2).

4. The extra-long tool support for a high-precision machine tool according to claim 3, characterized in that: Also includes The cylinder rear bracket (19) is mounted on the gun drill base (18), and the cylinder body is mounted on the gun drill base (18) by the cylinder rear bracket (19); The cylinder front bracket (13) is mounted on the slider bracket (10), and the piston rod of the cylinder is connected to the slider bracket (10) by the cylinder front bracket (13).

5. The extra-long tool support bracket for high-precision machine tools according to claim 1, characterized in that: It also includes a transition gear (17), which is installed in the mounting cavity. The driving gear (16) and the driven gear (15) are located on both sides of the transition gear (17) and are meshed with the transition gear (17).

6. The extra-long tool support bracket for high-precision machine tools according to claim 1, characterized in that: The sensor bracket (8) is mounted on the mounting base (14) on the side away from the main spindle (3) of the machine tool, and the sensor bracket (8) is located above the machining long tool (5).

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