Intelligent tailstock

Abstract

The application relates to a smart tailstock, and relates to the technical field of mechanical manufacturing. The smart tailstock comprises a workpiece top-holding mechanism, a servo hydraulic driving mechanism, a sleeve position detection mechanism and a sleeve limiting mechanism. The workpiece top-holding mechanism is arranged in the tailstock body shell and is used for top-holding a workpiece hung between a headstock and the tailstock. The servo hydraulic driving mechanism is arranged in the tailstock body shell and is used for driving a top pin to apply a top-holding force to the workpiece. The sleeve position detection mechanism is arranged behind the tailstock body shell and is used for detecting the position of a sleeve. The sleeve limiting mechanism is arranged behind the tailstock body shell and is arranged in parallel with the sleeve position detection mechanism and is used for setting a sleeve moving limiting distance. The application aims to provide a smart tailstock with high automation degree and capable of monitoring and controlling a top-holding force during grinding of workpieces with different sizes and weight specifications.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing technology, specifically to an intelligent tailstock. Background Technology

[0002] The tailstock is a crucial functional component in cylindrical grinding machines, working in conjunction with the headstock to support and center the workpiece. During grinding, the headstock drives the workpiece to rotate, while the tailstock, relying on a simple internal mechanical structure, drives the center to extend, achieving a centering and clamping action between the headstock and tailstock centers. Currently, there are two main structural types for the internal drive of the tailstock center to extend and retract. One type uses a lever to compress an internal spring in a sleeve, causing the tailstock center to retract with the sleeve's movement. After the workpiece is lifted into position, releasing the lever allows the tailstock center to hold the workpiece end face in the center hole under the spring's action. The other type uses a hydraulic cylinder to achieve the extension and retraction of the tailstock, but the clamping force is difficult to control precisely. When grinding shaft parts, the clamping force affects the grinding quality. Excessive clamping force causes elastic deformation of the workpiece, affecting machining accuracy due to springback before and after grinding. Insufficient clamping force results in insufficient contact rigidity between the tailstock tip and the workpiece's center hole, causing the tailstock tip centerline to deviate from the grinding wheel spindle centerline due to parallelism errors, leading to a tapered workpiece. In severe cases, the workpiece may even fall, causing a safety accident. Furthermore, the tailstock tip's extension and retraction stroke is limited, requiring either manual tip replacement or repositioning of the tailstock using other devices, which is time-consuming and labor-intensive.

[0003] Modern manufacturing demands more efficient and flexible processing from grinding machines. Taking the grinding of shaft parts on an automotive transmission production line as an example, multiple specifications of shafts are produced in a fully automated line, requiring high grinding cycle times. To adapt to this automated processing, it is necessary to develop an intelligent tailstock for automated grinding of shaft parts, which can adjust the preload to suit different sizes, weights, and machining accuracy requirements, thereby completing the precision grinding of the workpiece. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an intelligent tailstock with a high degree of automation that can adapt to the monitoring and control of clamping force during grinding of workpieces of different sizes and weights.

[0005] To achieve the above objectives, the present invention provides an intelligent tailstock, including a workpiece holding mechanism, a servo hydraulic drive mechanism, a sleeve position detection mechanism, and a sleeve limiting mechanism;

[0006] The workpiece holding mechanism is located inside the tailstock housing and is used to hold the workpiece that is hoisted between the headstock and the tailstock.

[0007] The servo hydraulic drive mechanism is located inside the tailstock housing and is used to drive the center to apply a clamping force to the workpiece.

[0008] The sleeve position detection mechanism is located behind the tailstock housing and is used to detect the sleeve position.

[0009] The sleeve limiting mechanism is located behind the tailstock housing and is arranged parallel to the sleeve position detection mechanism. It is used to set the sleeve movement limit distance.

[0010] Furthermore, the workpiece holding mechanism includes a sleeve, a center, a pressure sensor, a washer, a spring, a rear cover, a first nut, a threaded seat, and a threaded sleeve; the front end of the tailstock housing has a spindle hole that slides with the sleeve; the front end of the sleeve has a tapered hole for mounting the center, and the rear end of the sleeve has a countersunk hole in which the pressure sensor, washer, and spring are sequentially installed; the rear end face of the tailstock housing is fitted with a rear cover by screws; the rear cover has a through hole at a coaxial position relative to the sleeve for mounting the threaded seat; the front end of the threaded seat has an external thread for mounting the first nut, and the threaded seat is fixed to the side wall of the rear cover by the first nut; the rear end of the threaded seat has a thread that movably connects with the threaded sleeve; the front end of the threaded sleeve has a countersunk hole for axial positioning of the spring.

[0011] Furthermore, by rotating the threaded sleeve, the spring is brought to a pre-compressed state; under the action of the spring pre-compressed force, the spring force F1 transmitted from the spring to the sleeve is measured by the pressure sensor between the sleeve and the gasket.

[0012] Furthermore, the servo hydraulic drive mechanism includes a hydraulic cylinder, a flange joint, a tension / compression sensor, a shift fork plate, a guide rod, a linear bearing, and a connecting plate; the cylinder body of the hydraulic cylinder is fixedly connected to the rear side plate of the rear cover; the connecting plate is fixedly connected to the rear end side of the sleeve; one end of the shift fork plate is provided with an arc-shaped groove, which abuts against the rear end of the sleeve and is fixedly connected to the side of the connecting plate; the other end of the shift fork plate is provided with a through hole for positioning and installing the flange joint at one end of the guide rod; the other end of the guide rod is supported in a hole provided in the tailstock housing by a linear bearing; the tension / compression sensor and the flange joint are sequentially installed on the other side of the shift fork plate where the guide rod is installed, and then it is threadedly connected to the piston rod of the hydraulic cylinder.

[0013] Furthermore, the hydraulic force F2 applied by the hydraulic cylinder to the shift fork plate is measured by the tension and compression sensor.

[0014] Furthermore, the servo hydraulic drive mechanism also includes a three-position four-way solenoid valve and a servo proportional valve. The hydraulic cylinder is externally connected to the three-position four-way solenoid valve and the servo proportional valve. The magnitude of the hydraulic force F2 is controlled by the servo proportional valve, and the extension and retraction of the piston rod of the hydraulic cylinder are controlled by the three-position four-way solenoid valve.

[0015] Furthermore, the servo hydraulic drive mechanism also includes a push rod, which is installed in a threaded hole located at the center of the sleeve. The rear end of the push rod protrudes through a through hole in the threaded sleeve. By rotating the push rod, it is moved forward to disengage the tip from the tapered hole of the sleeve.

[0016] Furthermore, the sleeve position detection mechanism includes a bracket, a probe, a measuring seat, and a measuring scale; the rear cover has a boring hole, the front end of the bracket is fixedly connected to the rear side of the connecting plate, the rear end passes through the boring hole of the rear cover and extends outward, and the probe is installed at the outermost end; the front end of the measuring seat is fixed to the rear side of the rear cover; the measuring scale is fixed on the measuring seat, and its length direction is parallel to the sleeve axis; the probe moves with the sleeve, and the sleeve position is detected by the relative positional relationship between the probe and the measuring scale.

[0017] Furthermore, the sleeve limiting mechanism includes a flange cover, a handle, a second nut, and a screw; one end of the screw is provided with an external thread and is movably connected to the connecting plate, and the other end is a threaded rod, on which the second nut is connected by a thread; the middle section of the screw is a smooth rod; the flange cover is embedded in the mounting hole provided in the rear cover through its outer circumference and the end face of the flange cover is fixed to the rear side of the rear cover with bolts; the flange cover is provided with a through hole and is slidably connected to the screw so that the axis of the screw is parallel to the axis of the sleeve; the handle is provided with a through hole along the axial direction and is fitted on the screw between the flange cover and the second nut; the rear end of the through hole of the handle is provided with an internal thread and is movably connected to the threaded rod of the screw; the displacement of the sleeve causes the screw and the handle to slide together; when the front side of the handle contacts the rear end face of the flange cover, the displacement of the sleeve cannot continue to move forward and is limited.

[0018] Furthermore, a displacement adjustment mechanism is provided below the tailstock to adjust the tailstock along the center line of the sleeve, so as to accommodate the support of workpieces of different lengths.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention's intelligent tailstock achieves automatic workpiece clamping and centering through a non-rotating center and a pre-compression spring located on the rear side of the sleeve in its workpiece holding mechanism. A spring with linear stiffness allows for pre-tensioning of the workpiece within a certain range. A pressure sensor between the spring and the sleeve measures the force exerted by the spring on the sleeve. A servo hydraulic drive mechanism, consisting of a hydraulic cylinder, a shift fork plate, and tension / compression sensors, enables the pushing and pulling of the sleeve and the measurement of the pushing and pulling force. A guide rod is located on the side of the shift fork plate, guiding the piston rod of the hydraulic cylinder using a linear bearing. The sleeve is internally connected to a top... The sleeve has a rod for easy removal of the center point; a measuring scale is installed in the sleeve position detection mechanism to detect the movement displacement of the sleeve; the sleeve limit mechanism adjusts the displacement limit of the sleeve by adjusting the position of the handle and the second nut on the screw; a displacement adjustment mechanism can be installed below the tailstock to automatically adapt to grinding workpieces of different lengths; the spring force measured by the pressure sensor and the piston rod output force measured by the tension and compression sensor form an algebraic sum and difference, and the hydraulic cylinder output pressure is adjusted by the servo proportional valve to adjust the clamping force of the workpiece, which is suitable for intelligent clamping of workpieces of different specifications. Attached Figure Description

[0021] Figure 1 This is a front view of the intelligent tailstock of the present invention;

[0022] Figure 2 This is a top view of the intelligent tailstock of the present invention;

[0023] Figure 3 This is a force-displacement adjustment diagram of the preload spring in the intelligent tailstock of the present invention.

[0024] In the figure:

[0025] 11. Tailstock housing; 12. Rear cover; 13. First nut; 14. Threaded seat; 15. Threaded sleeve; 16. Top rod; 20. Sleeve; 21. Center; 22. Pressure sensor; 23. Gasket; 24. Spring; 25. Hydraulic cylinder; 26. Flange joint; 27. Tension / compression sensor; 28. Shift fork plate; 29. ​​Guide rod; 30. Linear bearing; 31. Connecting plate; 32. Bracket; 33. Probe; 34. Measuring seat; 35. Measuring scale; 36. Flange cover; 37. Handle; 38. Second nut; 39. Screw; 45. Three-position four-way solenoid valve; 46. Servo proportional valve. Detailed Implementation

[0026] To achieve the above objectives and effects, the technical means and structure adopted by the present invention will be described in detail with reference to the accompanying drawings, focusing on the features and functions of the preferred embodiments of the present invention.

[0027] like Figure 1-3 As shown, the present invention provides an intelligent tailstock, including a workpiece holding mechanism, a servo hydraulic drive mechanism, a sleeve position detection mechanism, and a sleeve limiting mechanism;

[0028] The workpiece holding mechanism is located inside the tailstock shell 11 and is used to hold the workpiece that is hoisted between the headstock and the tailstock.

[0029] The servo hydraulic drive mechanism is located inside the tailstock housing 11 and is used to drive the center point 21 to apply a clamping force to the workpiece.

[0030] The sleeve position detection mechanism is located behind the tailstock housing 11 and is used to detect the position of the sleeve 20.

[0031] The sleeve limiting mechanism is located behind the tailstock housing 11 and is arranged parallel to the sleeve position detection mechanism. It is used to set the movement limit distance of the sleeve 20.

[0032] The workpiece holding mechanism includes a sleeve 20, a center 21, a pressure sensor 22, a washer 23, a spring 24, a rear cover 12, a first nut 13, a threaded seat 14, and a threaded sleeve 15. The front end of the tailstock housing 11 has a spindle hole that slides through the sleeve 20. The front end of the sleeve 20 has a tapered hole for mounting the center 21, and the rear end of the sleeve 20 has a countersunk hole in which the pressure sensor 22, the washer 23, and the spring 24 are sequentially installed. The rear end face of the tailstock housing 11 is fitted with the rear cover 12 by screws. The rear cover 12 has a through hole at a coaxial position relative to the sleeve 20 for mounting the threaded seat 14. The front end of the threaded seat 14 has an external thread for mounting the first nut 13, which fixes the threaded seat 14 to the side wall of the rear cover 12. The rear end of the threaded seat 14 has an internal thread that movably connects to the threaded sleeve 15. The front end of the threaded sleeve 15 has a countersunk hole for axial positioning of the spring 24. By rotating the threaded sleeve 15, the spring 24 is pre-compressed; under the action of the pre-compression of the spring 24, the spring force F1 transmitted from the spring 24 to the sleeve 20 is measured by the pressure sensor 22 between the sleeve 20 and the gasket 23.

[0033] The servo hydraulic drive mechanism includes a hydraulic cylinder 25, a flange joint 26, a tension / compression sensor 27, a shift fork plate 28, a guide rod 29, a linear bearing 30, and a connecting plate 31. The cylinder body of the hydraulic cylinder 25 is fixed to the rear of the side plate of the rear cover 12 by screws. The connecting plate 31 is fixed to the rear side of the sleeve 20 by screws. One end of the shift fork plate 28 is provided with an arc-shaped groove of the same size as the outer diameter of the sleeve 20. The arc-shaped groove abuts against the rear end of the sleeve 20 and is fixed to the side of the connecting plate 31 by screws. The other end of the shift fork plate 28 is provided with a through hole for positioning and installing the flange joint 26 at one end of the guide rod 29. The other end of the guide rod 29 is supported in a hole provided in the tailstock housing 11 by the linear bearing 30. The tension / compression sensor 27 and the flange joint 26 are installed in sequence on the other side of the shift fork plate 28 where the guide rod 29 is installed, and then the piston rod of the hydraulic cylinder 25 is threadedly connected to it. The hydraulic force F2 applied by the hydraulic cylinder 25 to the shift fork 28 is measured by the tension / compression sensor 27. The servo hydraulic drive mechanism also includes a three-position four-way solenoid valve 45 and a servo proportional valve 46. The hydraulic cylinder 25 is externally connected to the three-position four-way solenoid valve 45 and the servo proportional valve 46. The magnitude of the hydraulic force F2 is controlled by the servo proportional valve 46, and the extension and retraction of the piston rod of the hydraulic cylinder 25 are controlled by the three-position four-way solenoid valve 45. When the hydraulic force F2 is opposite to the spring force F1, the clamping force applied to the workpiece through the sleeve 20 and the center 21 can be reduced; when the hydraulic force F2 is the same as the spring force F1, the clamping force applied to the workpiece through the sleeve 20 and the center 21 can be increased.

[0034] The servo hydraulic drive mechanism also includes a push rod 16, which is installed in a threaded hole at the center of the sleeve 20. The rear end of the push rod 16 is exposed after passing through a through hole in the threaded sleeve 15. By rotating the push rod 16, the push rod 16 can be moved forward to disengage the tip 21 from the tapered hole of the sleeve 20.

[0035] The sleeve position detection mechanism includes a bracket 32, a probe 33, a measuring base 34, and a measuring scale 35. The rear cover 12 is provided with a boring hole. The front end of the bracket 32 ​​is fixed to the rear side of the connecting plate 31 by screws, and the rear end extends outward after passing through the boring hole of the rear cover 12, with the probe 33 installed at the outermost end. The front end of the measuring base 34 is fixed to the rear side of the rear cover 12 by bolts. The measuring scale 35 is fixed to the measuring base 34 by screws, and its length direction is parallel to the axis of the sleeve 20. The probe 33 moves with the sleeve 20, and the position of the sleeve 20 is detected by the relative positional relationship between the probe 33 and the measuring scale 35.

[0036] The sleeve limiting mechanism includes a flange cover 36, a handle 37, a second nut 38, and a screw 39. One end of the screw 39 is threaded and movably connected to the connecting plate 31, while the other end is a threaded rod connected to the second nut 38 via threads. The middle section of the screw 39 is smooth. The flange cover 36 is inserted into the mounting hole of the rear cover 12 through its outer circumference and fixed to the rear side of the rear cover 12 with bolts. The flange cover 36 has a through hole that slidably connects to the screw 39, making the axis of the screw 39 parallel to the axis of the sleeve 20. The handle 37 moves axially... A threaded rod 39 with a through hole is fitted between the flange cover 36 and the second nut 38. The rear end of the handle 37 with the through hole has an internal thread that is movably connected to the threaded rod of the threaded rod 39. The displacement of the sleeve 20 causes the threaded rod 39 and the handle 37 to slide together. When the front side of the handle 37 contacts the rear end face of the flange cover 36, the displacement of the sleeve 20 is limited and cannot move forward. The distance S between the handle 37 and the end face of the flange cover 36 is the movement limit distance of the sleeve 20. After the second nut 38 is screwed in along the threaded rod of the threaded rod 39, it abuts against the rear end of the handle 37, which plays a role in preventing loosening.

[0037] In this embodiment, a displacement adjustment mechanism is provided below the tailstock to adjust the tailstock along the center line of the sleeve 20, so as to accommodate the support of workpieces of different lengths.

[0038] In this invention, the intelligent tailstock achieves automatic clamping and centering of the workpiece by relying on a non-rotating center 21 and a pre-compression spring 24 located on the rear side of the sleeve 20 in the workpiece holding mechanism. The spring 24, with linear stiffness, allows the tailstock to pre-tighten the workpiece within a certain range. A pressure sensor 22 is installed between the spring 24 and the sleeve 20 to measure the force exerted by the spring 24 on the sleeve 20. A servo hydraulic drive mechanism consisting of a hydraulic cylinder 25, a shift fork plate, and a tension / compression sensor 27 is used to push and pull the sleeve 20 and measure the pushing and pulling force. A guide rod 29 is provided on the side of the shift fork plate, which guides the piston rod of the hydraulic cylinder 25 using a linear bearing 30. The sleeve 20... The internal connecting rod 16 facilitates the removal of the center point 21; the sleeve position detection mechanism is equipped with a measuring scale 35, which can detect the movement displacement of the sleeve 20; the sleeve limiting mechanism adjusts the displacement limit of the sleeve 20 by adjusting the position of the handle 37 and the second nut 38 on the screw 39; a displacement adjustment mechanism can be set below the tailstock to automatically adapt to grinding workpieces of different lengths; the spring force measured by the pressure sensor 22 and the piston rod output force measured by the tension and compression sensor 27 form an algebraic sum and difference, and the output pressure of the hydraulic cylinder 25 is adjusted by the servo proportional valve to realize the adjustment of the workpiece clamping force, which is suitable for intelligent clamping of workpieces of different specifications.

[0039] like Figure 3 As shown, the spring force provided by a spring with linear stiffness in its natural state can be minimized by the minimum clamping force F. min and maximum clamping force Fmax The range ensures that the workpiece will not deform excessively and affect its processing; at this point, the spring's compression stroke is S.

[0040] When machining a batch of workpieces of constant length, the tailstock is moved so that the distance between the headstock and tailstock is such that the remaining space length after the workpiece is hoisted is within the range of S, ensuring that the minimum clamping force F provided by the spring 24 is maintained under natural conditions. min Without falling and maximum clamping force F max To avoid excessive deformation of the workpiece, the adjustment steps for the clamping force are as follows:

[0041] (1) Determine the clamping force F based on the characteristics of the workpiece being machined. L ;

[0042] (2) The workpiece is hoisted between the headstock and tailstock and held in place. The clamping force F1 at this time is obtained by the pressure sensor 22.

[0043] (3) According to F L The difference between F1 and F2 is used to calculate the control quantity of the servo proportional valve 46, and then the output force F2 of the hydraulic cylinder 25 is adjusted through the three-position four-way solenoid valve. F1 and F2 are used to satisfy F... L Requirements;

[0044] (4) Adjust the clamping force F according to the processing quality requirements of the workpiece and the differences between rough grinding and fine grinding. L Then make adjustments according to step (3).

[0045] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A smart tail carriage, characterized in that, This includes a workpiece holding mechanism, a servo hydraulic drive mechanism, a sleeve position detection mechanism, and a sleeve limiting mechanism; The workpiece holding mechanism is located inside the tailstock housing and is used to hold the workpiece that is hoisted between the headstock and the tailstock. The servo hydraulic drive mechanism is located inside the tailstock housing and is used to drive the center to apply a clamping force to the workpiece. The sleeve position detection mechanism is located behind the tailstock housing and is used to detect the sleeve position. The sleeve limiting mechanism is located behind the tailstock housing and is arranged parallel to the sleeve position detection mechanism. It is used to set the sleeve movement limit distance. The workpiece holding mechanism includes a sleeve, a center, a pressure sensor, a washer, a spring, a rear cover, a first nut, a threaded seat, and a threaded sleeve. The front end of the tailstock housing has a spindle hole that slides through the sleeve. The front end of the sleeve has a tapered hole for mounting the center, and the rear end of the sleeve has a countersunk hole in which the pressure sensor, washer, and spring are sequentially installed. The rear end face of the tailstock housing is fitted with a rear cover by screws. The rear cover has a through hole at a coaxial position relative to the sleeve for mounting the threaded seat. The front end of the threaded seat has an external thread for mounting the first nut, which fixes the threaded seat to the side wall of the rear cover. The rear end of the threaded seat has a thread that movably connects to the threaded sleeve. The front end of the threaded sleeve has a countersunk hole for axial positioning of the spring. By rotating the threaded sleeve, the spring is pre-compressed. Under the pre-compression of the spring, the spring force F1 transmitted from the spring to the sleeve is measured by the pressure sensor between the sleeve and the washer. The servo hydraulic drive mechanism includes a hydraulic cylinder, a flange joint, a tension / compression sensor, a shift fork plate, a guide rod, a linear bearing, and a connecting plate. The cylinder body of the hydraulic cylinder is fixedly connected to the rear side plate of the rear cover. The connecting plate is fixedly connected to the rear end side of the sleeve. One end of the shift fork plate has an arc-shaped groove, which abuts against the rear end of the sleeve and is fixedly connected to the side of the connecting plate. The other end of the shift fork plate has a through hole for positioning and installing the flange joint at one end of the guide rod. The other end of the guide rod is supported in a hole in the tailstock housing by a linear bearing. The tension / compression sensor and the flange joint are sequentially installed on the other side of the shift fork plate where the guide rod is installed, and then it is threadedly connected to the piston rod of the hydraulic cylinder. The hydraulic force F2 applied by the hydraulic cylinder to the shift fork plate is measured by the tension / compression sensor. The sleeve position detection mechanism includes a bracket, a probe, a measuring base, and a measuring scale; the rear cover has a boring hole, the front end of the bracket is fixed to the rear side of the connecting plate, the rear end passes through the boring hole of the rear cover and extends outward, and the probe is installed at the outermost end; the front end of the measuring base is fixed to the rear side of the rear cover; the measuring scale is fixed on the measuring base, and its length direction is parallel to the sleeve axis; the probe moves with the sleeve, and the sleeve position is detected by the relative positional relationship between the probe and the measuring scale; The sleeve limiting mechanism includes a flange cover, a handle, a second nut, and a screw. One end of the screw has an external thread that is movably connected to the connecting plate, and the other end is a threaded rod. The second nut is connected to the threaded rod by a thread, and the middle section of the screw is a smooth rod. The flange cover is embedded in the mounting hole of the rear cover through its outer circumference and is fixed to the rear side of the rear cover with bolts. The flange cover has a through hole that is slidably connected to the screw, so that the axis of the screw is parallel to the axis of the sleeve. The handle has a through hole along the axial direction and is fitted onto the screw between the flange cover and the second nut. The rear end of the handle's through hole has an internal thread that is movably connected to the threaded rod of the screw. The displacement of the sleeve causes the screw and the handle to slide together. When the front side of the handle contacts the rear end face of the flange cover, the displacement of the sleeve cannot continue to move forward and is limited.

2. The intelligent tail carriage as described in claim 1, characterized in that, The servo hydraulic drive mechanism also includes a three-position four-way solenoid valve and a servo proportional valve. The hydraulic cylinder is externally connected to the three-position four-way solenoid valve and the servo proportional valve. The magnitude of the hydraulic force F2 is controlled by the servo proportional valve. The extension and retraction of the piston rod of the hydraulic cylinder are controlled by the three-position four-way solenoid valve.

3. The intelligent tail carriage as described in claim 2, characterized in that, The servo hydraulic drive mechanism also includes a push rod, which is installed in a threaded hole at the center of the sleeve. The rear end of the push rod protrudes through a through hole in the threaded sleeve. By rotating the push rod, it is moved forward to disengage the tip from the tapered hole of the sleeve.

4. The intelligent tail carriage as described in claim 1, characterized in that, A displacement adjustment mechanism is provided below the tailstock to adjust the tailstock along the center line of the sleeve, so as to accommodate the support of workpieces of different lengths.

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