Servo tailstock device for cylindrical grinding machine

Abstract

The utility model provides a servo tailstock device for a cylindrical grinding machine, and belongs to the technical field of grinding machine equipment. Comprising a base, a servo motor, a precision ball screw, a lead screw nut and a tailstock shell. The base is installed on a grinding machine workbench. The servo motor is fixed on the base through a bearing seat; the precision ball screw is in output connection with the servo motor and is supported by the bearing seat; the screw nut is matched with the precision ball screw; the tailstock shell is fixedly connected with the lead screw nut. The tailstock shell is in sliding connection with the base through the high-precision linear guide rail and the guide rail sliding block. A sleeve is coaxially and fixedly connected into the tailstock shell, and a tip is installed in the sleeve. The position of the tailstock is accurately controlled through the servo motor and the precise ball screw, adjustment is convenient and fast, multi-gear adjustable constant jacking torque can be provided, the cutting quality consistency is guaranteed, and the problems that in the prior art, tailstock adjustment is tedious, jacking force is not stable, workpiece deformation cannot be compensated and the like are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of grinding equipment, specifically relating to a servo tailstock device for an external cylindrical grinding machine. Background Technology

[0002] When batch grinding slender, high-precision (cylindricity, straightness, etc.) shaft workpieces, variations in clamping torque, workpiece diameter, and bending deformation caused by thermal elongation during the grinding process can severely affect the efficiency and quality of batch grinding. In traditional technology, when the workpiece length changes or the center hole depth is inconsistent, the tailstock position and clamping force need to be readjusted, which is very cumbersome and unreliable in production.

[0003] Current technologies, whether manual or semi-automatic (hydraulic, spring-loaded, hydraulically retracted, etc.), have a fixed tailstock position, and tightening or loosening can only be achieved by extending or retracting the tailstock sleeve. The tightening force is determined by the hydraulic or spring pressure and the operator's experience. Manual tailstocks, such as... Figure 3 As shown, the structure is simple but the reliability is poor, making it unsuitable for CNC grinding machines. A semi-automatic tailstock, as... Figure 4 As shown, these traditional tailstocks have complex structures and high manufacturing costs. When the workpiece length changes, the position of the tailstock on the worktable and the spring clamping amount need to be adjusted, making operation inconvenient. The clamping force of these traditional tailstocks is determined by hydraulic or spring pressure and the operator's experience, making it difficult to guarantee the stability and consistency of grinding quality. Therefore, there is an urgent need to design a servo tailstock device for cylindrical grinding machines to solve the problems of cumbersome tailstock adjustment, unstable clamping force, and inability to automatically compensate for workpiece deformation in existing technologies. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a servo tailstock device for an external cylindrical grinding machine. This utility model aims to solve the problems of cumbersome tailstock adjustment, unstable clamping force, and inability to compensate for workpiece deformation in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A servo tailstock device for an external cylindrical grinding machine includes: a base, a servo motor, a ball screw, a screw nut, and a tailstock housing;

[0007] The base is mounted on the grinding machine worktable;

[0008] The servo motor is fixed to the base via a bearing housing;

[0009] The ball screw is connected to the output of the servo motor and is supported by a bearing housing;

[0010] The lead screw nut is fitted with a ball screw;

[0011] The tailstock housing is fixedly connected to the lead screw nut;

[0012] The tailstock housing is slidably connected to the base via a linear guide rail and a guide rail slider;

[0013] A sleeve is coaxially fixedly connected to the tailstock housing, and a center is installed inside the sleeve.

[0014] Further defining the above solution, the ball screw is fixed in the bearing housing by an angular contact bearing, a lock nut, and a spacer, and is also fixed by a bearing cover; the ball screw is connected to the output end of the servo motor via a coupling.

[0015] Further defining the above solution, the linear guide rail is positioned and fixed by the linear guide rail surface and wedge block on the base, and the guide rail slider is connected to the tailstock housing by screws; the guide rail slider and the linear guide rail are slidably adapted together.

[0016] To further define the above solution, the base is provided with a left limiting block and a right limiting block to limit the movement range of the tailstock housing.

[0017] As a further limitation of the above solution, the base is fixed to the worktable by a clamping mechanism and fixing screws.

[0018] Advantages of this utility model compared to the prior art:

[0019] 1. This solution achieves precise control of the tailstock position through a servo motor and a precision ball screw, which is easy to adjust and can provide multiple adjustable constant clamping torques to ensure consistent grinding quality;

[0020] 2. This solution, combined with the machine tool control system, enables dynamic tracking and compensation, automatically adapting to workpiece thermal deformation and improving machining accuracy;

[0021] 3. This solution has a compact structure, high reliability, and stable and reliable performance. It is suitable for batch precision machining on CNC grinding machines, reducing manual intervention and improving production efficiency. Attached Figure Description

[0022] Figure 1 This is a front view of the structure of this utility model;

[0023] Figure 2 This is a right view of the structure of this utility model;

[0024] Figure 3 This is a schematic diagram of a traditional manual tailstock structure. Figure 4 This is a schematic diagram of a traditional semi-automatic tailstock structure. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] Please see Figure 1-4 The embodiments of this utility model are described in detail below.

[0029] Example: See Figure 1 As shown, the servo tailstock device for an external cylindrical grinding machine includes: a base 1, a servo motor 2, a precision ball screw 6, a screw nut 17, and a tailstock housing 9.

[0030] See Figure 2 As shown, the base 1 is fixed to the grinding machine worktable by clamping mechanism 15 and fixing screws 16.

[0031] See Figure 1 As shown, the servo motor 2 is fixed to the base 1 via the bearing seat 3.

[0032] See Figure 1As shown, the precision ball screw 6 is connected to the output of the servo motor 2 and is supported by the bearing housing 3. Specifically, the precision ball screw 6 is fixed in the bearing housing 3 by an angular contact bearing 7, a locking nut 5, and a spacer, and is further secured by a bearing cover 8; the precision ball screw 6 is connected to the output end of the servo motor 2 via a coupling 4. The screw nut 17 mates with the precision ball screw 6. The tailstock housing 9 is fixedly connected to the screw nut 17.

[0033] See Figure 2 As shown, the tailstock housing 9 is slidably connected to the base 1 via a high-precision linear guide rail 13 and a guide rail slider 12. Specifically, the high-precision linear guide rail 13 is positioned and fixed by a linear guide rail surface and a wedge block 14 on the base 1, and the guide rail slider 12 is connected to the tailstock housing 9 by screws. The guide rail slider 12 and the high-precision linear guide rail 13 are slidably fitted together to ensure the linearity of the axial movement of the tailstock housing 9, with a stroke of up to 60mm.

[0034] See Figure 1 As shown, the base 1 is provided with a left limiting block 18 and a right limiting block 19 to limit the movement range of the tailstock housing 9.

[0035] See Figure 1 As shown, a sleeve 10 is coaxially fixedly connected to the tailstock housing 9, and a center 11 is installed inside the sleeve 10.

[0036] In this embodiment, the servo motor 2 drives the precision ball screw 6 to precisely transmit the clamping torque to the Morse code 4 center 11 inside the tailstock housing 9 and sleeve 10 according to the set value, thereby achieving workpiece clamping and loosening. This solution achieves precise control of the tailstock position through the servo motor and precision ball screw, which is easy to adjust and can provide multiple adjustable constant clamping torques to ensure consistent cutting quality.

[0037] Furthermore, when combined with a CNC machine tool, this invention allows for programmable control of the tailstock position, clamping torque, and dynamic tracking compensation by the CNC system. The specific functions implemented are as follows:

[0038] 1. Position programming: The tailstock clamping position R and the exit position P are set by the CNC system, and the servo motor 2 drives the ball screw 6 to move the tailstock housing 9 to the set position.

[0039] 2. Constant clamping torque: The CNC system sets the clamping torque according to the workpiece size, and the servo motor 2 outputs the corresponding torque. The system automatically records the clamping position R. If the set torque is not reached, the system alarms and allows compensation adjustment.

[0040] 3. Dynamic tracking compensation: During batch finishing, the workpiece may elongate or shorten, causing bending deformation. At this time, the CNC system monitors the change of clamping torque and automatically adjusts the tailstock position to maintain a constant clamping force to compensate for the thermal deformation of the workpiece.

[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A servo tailstock device for an external cylindrical grinding machine, characterized in that: include: Base (1), servo motor (2), ball screw (6), screw nut (17), tailstock housing (9); The base (1) is mounted on the grinding machine worktable; The servo motor (2) is fixed to the base (1) by a bearing seat (3); The ball screw (6) is connected to the output of the servo motor (2) and is supported by the bearing housing (3); The lead screw nut (17) is fitted with the ball screw (6); The tailstock housing (9) is fixedly connected to the lead screw nut (17); The tailstock housing (9) is slidably connected to the base (1) via a linear guide rail (13) and a guide rail slider (12); A sleeve (10) is coaxially fixedly connected in the tailstock housing (9), and a center (11) is installed inside the sleeve (10).

2. The servo tailstock device for an external cylindrical grinding machine according to claim 1, characterized in that: The ball screw (6) is fixed in the bearing housing (3) by an angular contact bearing (7), a locking nut (5) and a spacer, and is fixed by a bearing cover (8); the ball screw (6) is connected to the output end of the servo motor (2) by a coupling (4).

3. The servo tailstock device for an external cylindrical grinding machine according to claim 1, characterized in that: The linear guide rail (13) is positioned and fixed by the linear guide rail surface and wedge (14) on the base (1), and the guide rail slider (12) is connected to the tailstock housing (9) by screws; the guide rail slider (12) and the linear guide rail (13) are slidably adapted together.

4. The servo tailstock device for an external cylindrical grinding machine according to claim 1, characterized in that: The base (1) is provided with a left limiting block (18) and a right limiting block (19) to limit the movement range of the tailstock housing (9).

5. The servo tailstock device for an external cylindrical grinding machine according to claim 1, characterized in that: The base (1) is fixed to the workbench by a clamping mechanism (15) and a fixing screw (16).

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