Numerically controlled machine tool follow-up tailstock

Abstract

The utility model discloses a numerically -controlled machine tool follow-up tailstock belongs to numerical control machine tool manufacturing technical field. The follow-up tailstock is including tailstock body and tailstock body and the tailstock locking device of tailstock body and saddle fixedity of linkage mechanism and tool rest sliding plate movement are still provided with. The cylinder output fixed connection sleeve lock rod of linkage mechanism, the length positioning sleeve is vertically provided below sleeve lock rod, and length positioning sleeve has the length positioning hole for sleeve lock rod and passes in the movable connection. Tailstock locking device is the locking plate connection of oil cylinder through locking rod, and locking plate sets up below saddle slide rail, and realizes locking plate and tailstock body tightly fixed on saddle through the oil cylinder and tightens locking rod. The utility model discloses through linkage mechanism and proximity switch realizes the technical effect that tailstock and tool rest sliding plate quick linkage and release, solved the defect that tailstock needs manual movement in the process of adjusting machine, improved the efficiency of adjusting machine.

Description

Technical Field

[0001] This utility model belongs to the field of CNC machine tool processing and manufacturing technology, and specifically relates to a CNC machine tool follower tailstock. Background Technology

[0002] CNC machine tools can be categorized by process into lathes, grinding machines, etc. To accommodate the machining of larger and longer workpieces, lathes generally have a long saddle and a tailstock. The main functions of the tailstock are to clamp the workpiece and prevent workpiece vibration. Therefore, before machining each batch of workpieces, the machine needs to be adjusted according to the shape of the workpiece and the machining requirements. The traditional adjustment method involves manually disassembling or loosening fasteners, then manually pushing the tailstock to move it. The position of the tailstock is adjusted according to the workpiece installation requirements, and then the fasteners are tightened to fix the tailstock. This adjustment method for long saddles requires simultaneous adjustment of the tool post and tailstock. This step-by-step adjustment method increases the adjustment time and is not conducive to improving production efficiency.

[0003] To further improve automation, a pneumatic locking device for the tailstock was developed and designed. However, tailstock adjustment is still neglected, and existing technologies lack automatic drive control. Simply setting up a tailstock drive system is not conducive to resource conservation and cost reduction. Existing utility model patent CN200920045681.8 discloses a machine tool tailstock following mechanism. During adjustment, the locking device between the tailstock body and the tailstock guide rail on the machine tool is manually loosened. The cross slide moves to a suitable position above the tailstock body, aligning the pin with the hole in the cross slide and inserting it into the hole. A limit screw fixes the pin to prevent it from coming out, thus achieving follow-up. Compared with this technical solution, its applicability needs improvement. Utility model patent CN201020680661.0, a machine tool tailstock linkage connection device, provides a tailstock body linkage device driven by an active shaft. This utility model, however, combines an existing device with a tool post slide to provide a rapid linkage adjustment technical solution. Utility Model Content

[0004] The purpose of this utility model is to provide a follow-up tailstock for CNC machine tools, which solves the technical problem of inconvenience caused by the lack of drive during the movement and adjustment of the tailstock in the prior art. It realizes synchronous movement and linkage with the tool holder slide, which improves production efficiency and simplifies the operation.

[0005] To achieve the above objectives, the following technical solution is provided:

[0006] A CNC machine tool follow-up tailstock includes a tailstock body and a center mechanism disposed on the tailstock body. The tailstock body is also provided with a linkage mechanism for the tailstock body to move with the tool post slide and a tailstock locking device.

[0007] The linkage mechanism includes a cylinder fixed on the tailstock body, a sleeve locking rod fixedly connected to the cylinder output end, a length positioning sleeve vertically arranged below the sleeve locking rod, a length positioning hole for the sleeve locking rod to be inserted and moved through the sleeve locking rod at one end, and a tool holder slide plate connected to the other end of the length positioning sleeve. When the cylinder drives the sleeve locking rod to lock and connect with the length positioning hole, the driving force on the tool holder slide plate is transmitted to the tailstock body through the length positioning sleeve, thereby achieving the linkage technology effect.

[0008] The tailstock locking device includes a hydraulic cylinder installed on the tailstock body. The hydraulic cylinder is connected to a locking plate via a locking rod. The locking plate is located below the saddle slide rail. By tightening the locking rod with the hydraulic cylinder, the locking plate and the tailstock body are firmly fixed to the saddle.

[0009] Furthermore, the tailstock locking device is also provided with a limiting rod parallel to the locking rod. The limiting rod is slidably disposed in the limiting hole of the tailstock body and the end is fixedly connected to the locking plate. Due to the action of the limiting rod, the locking plate is ensured to always maintain parallel movement with the tailstock body or the saddle, avoiding the technical defect of poor locking effect after tilting.

[0010] Furthermore, a buffer device is also provided on the tailstock body. The buffer device is fixedly connected to the tailstock body base plate via a mounting base. A mounting sleeve is provided on the mounting base, and the mounting sleeve is filled with elastic buffer material. The mounting sleeve is connected to a buffer rod via a fixing nut. The buffer rod is telescopic. The buffer rod extends into the mounting sleeve and abuts against the buffer material, providing a buffering reverse force. The contact surface between the buffer rod and the fixing nut slides and rubs. The part of the buffer rod outside the mounting sleeve has a contact surface with the tool holder slide plate, and a spring can be added to improve the technical buffering effect.

[0011] Furthermore, a proximity switch is also provided on the tailstock body base plate. The proximity switch includes a sensing device mounted on the tailstock body and a sensing plate mounted on the tool holder slide. When the tool holder slide moves to the vicinity of the tailstock body, the sensing device enables the length positioning hole to align with the sleeve locking rod for positioning, triggering the tool holder slide screw drive to stop.

[0012] Furthermore, a polyurethane buffer block is installed on the side of the tailstock body facing away from the tool post slide to prevent the tailstock body from colliding with the saddle.

[0013] Furthermore, the tailstock body is provided with sliding grooves on both sides of its bottom, and the sliding grooves are slidably connected to the guide rails on both sides of the saddle through roller sliders, so as to realize the movement of the tailstock body on the saddle.

[0014] The beneficial effects of this utility model are:

[0015] This invention achieves rapid machine setup by using a cylinder to quickly drive the sleeve locking rod to engage with the length positioning sleeve, enabling the tailstock and tool post slide to move together with the drive screw. This effectively reduces setup time, improves work efficiency, and lowers manual labor intensity, thus contributing to the development of CNC machine tool automation technology. Furthermore, to enhance the technical effect, this invention also includes a proximity switch, a tailstock body buffer device, and a cylinder-based tailstock locking device, overcoming the drawbacks of manual tailstock movement. These auxiliary devices make this invention more practical and reliable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the tailstock structure of this utility model;

[0017] Figure 2 This is a schematic diagram showing the location of the internal components of the tailstock of this utility model;

[0018] Figure 3 This is a schematic diagram of the buffer device of this utility model;

[0019] Figure 4 This is a schematic diagram of the tailstock locking device of this utility model;

[0020] Figure 5 This is a schematic diagram showing the assembly and linkage between this utility model and the tool holder slide plate;

[0021] Figure 6 This is a schematic diagram of the drive principle of the slide screw of the tool holder in this utility model;

[0022] Figure 7 This is a schematic diagram of a utility model installed on a CNC machine tool.

[0023] The components include: 1. Tailstock body; 2. Top-mounting mechanism; 3. Linkage mechanism; 4. Buffer device; 5. Tailstock locking device; 6. Proximity switch; 7. Tool holder slide plate; 301. Cylinder; 302. Screw; 303. Sleeve locking rod; 304. Length positioning sleeve; 305. Length positioning hole; 401. Mounting base; 402. Mounting sleeve; 403. Fixing nut; 404. Buffer top rod; 501. Hydraulic cylinder; 502. Locking rod; 503. Locking plate; 504. Limiting rod. Detailed Implementation

[0024] To better understand this utility model, the structure and working principle of this utility model will be further explained below with reference to the accompanying drawings.

[0025] Please refer to Figures 1-7This utility model is a CNC machine tool follow-up tailstock. The follow-up tailstock is slidably connected to the saddle of the CNC machine tool. When adjusting the machine according to the workpiece processing needs, the tailstock can achieve the technical effect of following the tool holder slide plate 7 through the linkage mechanism 3. At the same time, the linkage mechanism 3 is positioned through the proximity switch 6. The CNC machine tool adjustment is automated through the tailstock locking device 5. The safety and applicability are ensured through the buffer device 4.

[0026] Specifically, the follow-up tailstock includes a tailstock body 1, a center mechanism 2, a linkage mechanism 3, a buffer device 4, a tailstock locking device 5, and a proximity switch 6. The center mechanism 2 is located on the top of the tailstock body 1 and is used to connect with the CNC machine tool to clamp the workpiece, preventing end-cutting vibration during the machining of long workpieces and thus preventing dimensional inaccuracies. The tailstock body 1 is designed to accommodate the installation of functional components, employing reinforcing ribs and reserved space to allow the tool holder slide plate 7 sufficient space to enter and assemble during linkage. On the tailstock body 1, a fixed hydraulic cylinder 501 is connected to a locking rod 502. The locking rod 502 passes through a corresponding through hole on the tailstock body 1 and its end is connected to a locking plate 503. The tailstock body 1 is slidably connected to the saddle via a bottom groove and a ball bearing slider. Releasing the locking plate 503 allows the tailstock body 1 to move freely, while tightening the locking plate 503 fixes the tailstock body 1 to the saddle. To prevent the locking plate 503 from shifting and causing poor locking effect, a limit hole is provided on the tailstock body 1. A limit rod 504 is installed in the limit hole and fixedly connected to the locking plate 503, so that the locking plate 503 can only move up and down and does not change in the horizontal direction, thereby improving the locking effect.

[0027] A cylinder 301 is provided in the middle of the tailstock body 1. The cylinder 301 is vertically fixed to the mounting plate of the base 1 by the mounting screw 302. One end of the cylinder 301 is connected to the sleeve locking rod 303. The sleeve locking rod 303 is located in the through hole of the tailstock body 1. The length positioning sleeve 304 is installed on the tool holder slide plate 7, and the end of the length positioning sleeve 304 has a length positioning hole 305, which can be inserted by the sleeve locking rod 303.

[0028] refer to Figure 3To prevent damage to the lead screw and affect machining accuracy caused by accidental collisions when the tailstock body 1 and the tool holder slide are linked together, and during the movement of the tool holder in the cutting process, a buffer device 4 is provided on the base of the tailstock body 1. The buffer device 4 includes a mounting base 401 fixed to the tailstock body 1, and a mounting sleeve 402 is provided on the mounting base 401. The mounting sleeve 402 is filled with a buffer material such as polyurethane. At the top of the mounting sleeve 402, a buffer rod 404 is connected by a fixing nut 403. The buffer rod 404 adopts a sliding sleeve structure, and the connection between the surface of the buffer rod 404 and the fixing nut 403 at the neck of the mounting sleeve 402 is a sliding connection, which can extend and retract inside the mounting sleeve 402, thereby preventing the tool holder from directly colliding with the tailstock body 1.

[0029] refer to Figure 1 A proximity switch 6 is also installed on the tailstock body 1. The proximity switch 6 includes a sensing device installed on the tailstock body 1 and a sensing plate installed on the tool holder slide plate 7. When the sensing device senses that the sensing plate is approaching and reaches the designated position, the proximity switch 6 sends a signal to cause the tool holder slide plate 7 to stop moving, so as to avoid the tool holder slide plate 7 from continuing to move and causing a collision accident. Another key function of the proximity switch 6 is to accurately position the sleeve locking rod 303 and the length positioning hole 305 to dock.

[0030] This invention is particularly applicable to double-headed, mid-drive lathes. When adjusting the machine for machining long bar stock and other workpieces, the tailstock and tool holder slide 7 are released according to the required spatial position for clamping the bar stock. After the mid-drive clamping device on the machine tool clamps the workpiece, the tool holder slide 7 moves to a position close to the tailstock body 1 via the pivot screw. The proximity switch 6 senses the tool holder slide 7 moving to the designated position, and the length positioning sleeve 304 is inserted into the through hole of the tailstock body 1. The length positioning hole 305 is located directly below the sleeve locking rod 303. The cylinder 301 drives the sleeve locking rod 303 to extend and pass into the length positioning hole 305. The cylinder 501 of the tailstock locking device 5 releases the locking plate 503, allowing the tailstock to move in conjunction with the tool holder slide 7. This adjustment method is more convenient in a closed machining environment. By setting the machining parameters, the tailstock can be driven by the tool holder slide 7. When the tool holder slide plate 7 moves to the starting position, the center mechanism 2 on the tailstock body 1 engages with the workpiece, the hydraulic cylinder 501 locks the locking plate 503, and the air cylinder 301 retracts the sleeve locking rod 303, releasing the linkage lock, and the tool holder can start processing without additional constraints.

[0031] Obviously, many modifications and variations can be made based on the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this invention, thereby enabling those skilled in the art to better understand and utilize it. This invention is limited only by the claims and their full scope and equivalents.

Claims

1. A CNC machine tool follow-up tailstock, comprising a tailstock body (1) and a center mechanism (2) disposed on the tailstock body (1), characterized in that: The tailstock body (1) is also provided with a linkage mechanism (3) for the tailstock body (1) to move with the tool holder slide plate (7) and a tailstock locking device (5); The linkage mechanism (3) includes a cylinder (301) fixed on the tailstock body (1), the output end of the cylinder (301) is fixedly connected to the sleeve locking rod (303), a length positioning sleeve (304) is vertically arranged below the sleeve locking rod (303), one end of the length positioning sleeve (304) is provided with a length positioning hole (305) for the sleeve locking rod (303) to pass through and move, and the other end of the length positioning sleeve (304) is connected to the tool holder slide plate (7); The tailstock locking device (5) includes a hydraulic cylinder (501) installed on the tailstock body (1). The hydraulic cylinder (501) is connected to a locking plate (503) via a locking rod (502). The locking plate (503) is installed below the saddle slide rail. By tightening the locking rod (502) with the hydraulic cylinder (501), the locking plate (503) and the tailstock body (1) are tightly fixed on the saddle.

2. The CNC machine tool follower tailstock according to claim 1, characterized in that: The tailstock locking device (5) is also provided with a limiting rod (504) parallel to the locking rod (502). The limiting rod (504) is slidably disposed in the limiting hole of the tailstock body (1) and its end is fixedly connected to the locking plate (503).

3. The CNC machine tool follower tailstock according to claim 1, characterized in that: The tail frame body (1) is also provided with a buffer device (4). The buffer device (4) is fixedly connected to the bottom plate of the tail frame body (1) through a mounting base (401). A mounting sleeve (402) is provided on the mounting base (401). The mounting sleeve (402) is filled with elastic buffer material. The mounting sleeve (402) is connected to a buffer top rod (404) through a fixing nut (403). The buffer top rod is telescopic.

4. The CNC machine tool follower tailstock according to claim 1, characterized in that: The tailstock body (1) is also provided with a proximity switch (6), which includes a sensing device installed on the tailstock body (1) and a sensing plate installed on the tool holder slide (7).

5. The CNC machine tool follower tailstock according to claim 1, characterized in that: The tailstock body (1) is equipped with a polyurethane buffer block on the side facing away from the tool holder slide plate (7) to prevent the tailstock body (1) from colliding with the saddle.

6. The CNC machine tool follower tailstock according to claim 1, characterized in that: The tailstock body (1) has sliding grooves on both sides of its bottom, and the sliding grooves are slidably connected to the guide rails on both sides of the saddle by roller sliders.

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