Linear feed device of numerical control grinding machine

Abstract

The utility model relates to the technical field of grinding machine, especially disclose a linear feed device of numerical control grinding machine, including first mobile mechanism, the head of setting on first mobile mechanism, the head is used for realizing grinding operation, first mobile mechanism includes base, sliding block, guide mechanism and drive mechanism, sliding block with guide mechanism sliding fit, the head is fixed in sliding block, drive mechanism includes first drive piece, with the first drive piece output end connects first screw rod spare and first screw rod nut, first screw rod nut and first screw rod spare screw engagement, sliding block is set up in base through guide mechanism and sliding block and first screw rod nut fixed connection, guide mechanism with first screw rod spare parallelly arranged, first drive piece is used for driving first screw rod spare rotation, through the thread cooperation of first screw rod nut and first screw rod spare drive sliding block and reciprocate along guide mechanism up and down.

Description

Technical Field

[0001] This utility model relates to the field of grinding technology, and in particular discloses a linear feed device for a CNC grinding machine. Background Technology

[0002] In the machining process of CNC grinding machines, the linear feed device, as the core component driving the grinding head to achieve precise displacement, directly determines the grinding quality of the workpiece and the service life of the equipment due to its operating accuracy, stability, and protective performance. Currently, most linear feed devices for CNC grinding machines on the market adopt a single-direction screw drive structure, which can only realize the feed movement of the grinding head in a single dimension, making it difficult to meet the machining needs of multi-directional grinding of complex workpieces. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a linear feed device for a CNC grinding machine.

[0004] To achieve the above objectives, this utility model provides a linear feed device for a CNC grinding machine, comprising a first moving mechanism and a grinding head mounted on the first moving mechanism. The grinding head is used to perform grinding operations. The first moving mechanism includes a base, a slider, a guide mechanism, and a drive mechanism. The slider is slidably engaged with the guide mechanism. The grinding head is fixed to the slider. The drive mechanism includes a first driving member, a first lead screw connected to the output end of the first driving member, and a first lead screw nut. The first lead screw nut is threadedly engaged with the first lead screw. The slider is slidably mounted on the base via the guide mechanism and is fixedly connected to the first lead screw nut. The guide mechanism is arranged parallel to the first lead screw. The first driving member drives the first lead screw to rotate. Through the threaded engagement between the first lead screw nut and the first lead screw, the slider is driven to move up and down along the guide mechanism, thereby driving the grinding head to move closer to or away from the external workpiece to be ground for grinding operations.

[0005] During operation, the first drive component drives the first lead screw component to rotate. The threaded engagement between the lead screw and the nut drives the slider to reciprocate up and down along the guide mechanism, thereby achieving precise displacement of the machine head towards or away from the workpiece to be ground and the grinding operation. Its beneficial effects are that the parallel layout of the guide mechanism and the lead screw component, as well as the fixed connection structure between the slider and the lead screw nut, effectively ensure the straightness of the slider movement, avoid wobbling and jamming problems, significantly improve the feed positioning accuracy and operational stability, and at the same time, the simplified transmission path reduces power loss, making the machine head displacement response faster, helping to improve the grinding quality and efficiency. The structural design is simple and reasonable and easy to assemble and maintain.

[0006] The guiding mechanism includes two sets of sliding guide rails, with a first lead screw located between the two sets of sliding guide rails. The slider is provided with two sets of movable mounting blocks on the side near the sliding guide rails for sliding in cooperation with the two sets of sliding guide rails. The first set of movable mounting blocks is slidably engaged with the first set of sliding guide rails, and the second set of movable mounting blocks is slidably engaged with the second set of sliding guide rails.

[0007] The symmetrical arrangement of two sets of sliding guide rails on both sides of the first lead screw provides balanced support for the slider, effectively counteracting the radial force and overturning moment generated during lead screw transmission. Combined with the precise fit between the movable mounting block and the guide rails, it can significantly reduce the frictional resistance and sway during slider movement, avoid jamming problems, and further improve the straightness and positioning accuracy of the feed motion, providing a reliable guarantee for stable grinding of the machine head.

[0008] The feeding device also includes a second moving mechanism. The first moving mechanism is reciprocated left and right in the second moving mechanism to adjust the mill head to move closer to or further away from the external workpiece to be ground for grinding operations.

[0009] The second moving mechanism includes a second driving member, a second lead screw member connected to the output end of the second driving member, and a second lead screw nut fixed to the base and meshing with the second lead screw member. The first moving mechanism is slidably disposed on the second lead screw member. The second driving member is used to drive the second lead screw member to rotate, and the first moving mechanism is driven to move back and forth by the threaded engagement between the second lead screw nut and the second lead screw member.

[0010] During operation, the second drive unit drives the second lead screw to rotate. With the help of the thread transmission between the second lead screw nut and the second lead screw, the first moving mechanism and the machine head mounted on it move back and forth along the axis of the second lead screw. Combined with the up and down feed achieved by the first moving mechanism, the machine head can be adjusted in multiple directions to meet the grinding requirements.

[0011] The feeding device also includes dust covers, and there are two sets of dust covers. The first set of dust covers is installed on the first moving mechanism, and the second set of dust covers is installed on the second moving mechanism.

[0012] Both the first and second dust covers are accordion-style telescopic dust covers. The telescopic direction of the first dust cover is consistent with the up-and-down reciprocating motion direction of the first moving mechanism, and the telescopic direction of the second dust cover is consistent with the left-and-right reciprocating motion direction of the second moving mechanism.

[0013] The first set of dust covers is installed outside the first moving mechanism, and the second set of dust covers is installed outside the second moving mechanism. Both sets of dust covers adopt an accordion-style telescopic dust cover structure. The telescopic direction of the first set of dust covers is consistent with the up-and-down reciprocating motion direction of the first moving mechanism, while the telescopic direction of the second set of dust covers is adapted to the left-and-right reciprocating motion direction of the second moving mechanism. The beneficial effect is that the accordion-style telescopic dust covers have good telescopic adaptability and can telescopically extend and retract synchronously with the movement of the corresponding moving mechanism without affecting normal feed. It can effectively prevent metal chips, dust and coolant generated during grinding operations from entering the interior of the moving mechanism, avoiding wear and jamming problems of core transmission components such as guide rails and lead screws due to foreign matter adhesion. At the same time, the sealing and protective characteristics extend the service life of the moving mechanism, reduce the frequency of equipment maintenance, and indirectly ensure the operational stability of the feed device and the grinding accuracy.

[0014] Two sets of elastic telescopic covers are fitted on the first lead screw component, and the first lead screw nut is located between the two sets of elastic telescopic covers. One end of the elastic telescopic cover is fixed on the base, and the other end is fixed on the first lead screw nut.

[0015] Two sets of elastic telescopic covers are fitted onto the first lead screw component. These covers are located on either side of the first lead screw nut, which is threaded into the first lead screw component. One end of each cover is fixed to the base of the first moving mechanism, and the other end is fixed to the first lead screw nut. The beneficial effect is that the elastic telescopic covers can expand and contract synchronously with the movement of the first lead screw nut. This avoids interference with the rotation of the first lead screw component and the reciprocating motion of the slider, while also completely enclosing the portion of the first lead screw component between the base and the first lead screw nut. This effectively prevents grinding debris, dust, and coolant from contacting the threaded surface of the lead screw, avoiding wear, jamming, or decreased transmission accuracy at the threaded engagement point due to foreign object intrusion. This significantly extends the service life of the first lead screw component and the first lead screw nut. Furthermore, the elastic structure has good fatigue resistance, making it suitable for long-term reciprocating motion scenarios, further ensuring the stability and reliability of the feed device's transmission.

[0016] The dust covers are installed using a two-end positioning method: a fixed end and a follower end. The fixed end of the first set of dust covers is securely connected to the base (fixed component) of the first moving mechanism with bolts, while the follower end is fixed to the slider (moving component) of the first moving mechanism via clips or threaded connectors, ensuring that it moves up and down synchronously with the slider. The fixed end of the second set of dust covers is rigidly connected to the grinding machine frame (or the fixed base of the second moving mechanism), while the follower end is fixed to the base (the component moving relative to the second moving mechanism) of the first moving mechanism to accommodate reciprocating motion in the left and right directions. During installation, it is necessary to ensure that the dust cover is parallel to the direction of movement of the corresponding moving mechanism, and that the connecting surfaces are flat and fit snugly to avoid installation deviations that could cause jamming during extension and retraction. If necessary, sealing strips can be added at the joints to enhance the protective effect.

[0017] The first driving component and the second driving component are servo motors, and the output shaft of the servo motor is connected to the first lead screw or the second lead screw through a flexible coupling.

[0018] Servo motors possess high-precision speed and position control capabilities, enabling precise adjustment of the rotation angle and speed of the lead screw, providing accurate power support for the feed motion. Meanwhile, flexible couplings effectively buffer installation deviations, vibrations, and impact loads between the motor output shaft and the lead screw, avoiding stress concentration and wear of components caused by rigid connections. They also reduce the impact of vibration transmission on transmission accuracy, ensuring smooth cooperation between the drive components and the lead screw transmission system, further enhancing the operational stability and positioning accuracy of the entire feed device, and adapting to the needs of high-precision grinding.

[0019] The machine head is equipped with a vibration sensor. When the vibration sensor detects abnormal vibration of the spindle, the external control center controls the first moving mechanism, the second moving mechanism, and the machine head to stop running.

[0020] A vibration sensor is installed on the head of the device. This sensor establishes a signal connection with an external control center and is specifically used to monitor the vibration status of the head spindle in real time. When the vibration sensor detects that the spindle vibration parameters exceed the preset normal range, it immediately transmits the abnormal signal to the external control center. The external control center then quickly issues control commands to simultaneously stop the first moving mechanism, the second moving mechanism, and the head. The beneficial effects are that the vibration sensor enables real-time monitoring of the spindle's operating status, allowing for timely detection of potential fault risks such as abnormal vibration. This avoids quality problems such as out-of-tolerance surface finish and scratches on the workpiece due to abnormal spindle vibration. At the same time, rapid shutdown prevents the abnormal vibration from escalating and causing irreversible damage to core components such as the head and moving mechanisms. This effectively reduces equipment maintenance costs and production losses, provides reliable safety assurance for grinding operations, and improves the safety and intelligence level of the device operation.

[0021] The machine head includes a main shaft, a first grinding wheel and a second grinding wheel respectively disposed on both sides of the main shaft. The grinding wheel includes a grinding disc and a rotary drive component for driving the grinding disc to rotate.

[0022] The core of the machine head includes a spindle and a first grinding wheel and a second grinding wheel respectively mounted on both sides of the spindle. The two sets of grinding wheels have the same structure, each consisting of a grinding disc for directly grinding the workpiece and a rotary drive component that provides power to the grinding disc. The rotary drive component is connected to the grinding disc to drive it to rotate at high speed, and together with the first and second moving mechanisms, it drives the precise displacement of the machine head to complete the grinding operation.

[0023] The beneficial effects of this utility model are as follows: Using a servo motor driving a lead screw via a flexible coupling as the core power source, and through the fixed connection between the lead screw nut and the slider, and the sliding cooperation between the slider and the guide mechanism, the first moving mechanism drives the machine head to feed up and down. Combined with the second moving mechanism driving the first moving mechanism to feed left and right, a two-dimensional displacement is formed. Simultaneously, a vibration sensor monitors the spindle status in real time, and a dust cover and elastic telescopic cover provide precise protection. The independent drive of the two grinding wheels on both sides of the spindle completes the grinding operation. The overall beneficial effects are: the symmetrical layout of the dual guide rails and the high-precision control of the servo motor ensure feed positioning accuracy; the two-dimensional feed system improves machining adaptability; the dual grinding wheel design reduces tool change time and clamping errors; the multiple protective structures extend equipment life; and the vibration monitoring and emergency stop functions reduce quality risks and maintenance costs. Ultimately, this achieves a simultaneous improvement in grinding operation accuracy, efficiency, and safety. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a cross-sectional view of the entire utility model;

[0026] Figure 3 This is a schematic diagram of the slider of this utility model;

[0027] Figure 4 This is a cross-sectional view of the entire utility model from another perspective;

[0028] Figure 5 For the present utility model Figure 1 A magnified structural diagram of part A in the middle.

[0029] The reference numerals in the figures include:

[0030] 1. First moving mechanism; 2. Machine head; 3. Base; 4. Slider; 5. First driving component; 6. First lead screw component; 7. First lead screw nut; 8. Sliding guide rail; 9. Moving mounting block; 11. Second moving mechanism; 12. Second driving component; 13. Second lead screw component; 14. Second lead screw nut; 15. Dust cover; 16. Elastic telescopic cover; 17. Vibration sensor; 18. Spindle; 19. First grinding wheel; 21. Second grinding wheel. Detailed Implementation

[0031] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0032] Please see Figures 1 to 5As shown, a linear feed device for a CNC grinding machine according to this utility model includes a first moving mechanism 1 and a head 2 mounted on the first moving mechanism 1. The head 2 is used to perform grinding operations. The first moving mechanism 1 includes a base 3, a slider 4, a guide mechanism, and a drive mechanism. The slider 4 is slidably engaged with the guide mechanism. The head 2 is fixed to the slider 4. The drive mechanism includes a first driving member 5, a first lead screw member 6 connected to the output end of the first driving member 5, and a first lead screw nut 7. The first lead screw nut 7 is threadedly engaged with the first lead screw member 6. The slider 4 is slidably mounted on the base 3 through the guide mechanism and is fixedly connected to the first lead screw nut 7. The guide mechanism is arranged parallel to the first lead screw member 6. The first driving member 5 is used to drive the first lead screw member 6 to rotate. Through the threaded engagement between the first lead screw nut 7 and the first lead screw member 6, the slider 4 is driven to move up and down along the guide mechanism, thereby driving the head 2 to move closer to or away from the external workpiece to be ground for grinding operations.

[0033] During operation, the first driving component 5 drives the first lead screw component 6 to rotate. Through the threaded engagement of the lead screw and nut, the slider 4 moves up and down along the guide mechanism, thereby achieving precise displacement of the machine head 2 towards or away from the workpiece to be ground and the grinding operation. Its beneficial effects are that the parallel layout of the guide mechanism and the lead screw component, as well as the fixed connection structure between the slider 4 and the lead screw nut, effectively ensure the straightness of the slider 4's movement, avoid wobbling and jamming problems, significantly improve the feed positioning accuracy and operational stability, and at the same time, the simplified transmission path reduces power loss, making the displacement response of the machine head 2 faster, helping to improve the grinding quality and efficiency. The structural design is simple and reasonable and easy to assemble and maintain.

[0034] The guiding mechanism includes two sets of sliding guide rails 8, a first lead screw 6 located between the two sets of sliding guide rails 8, and a slider 4 with two sets of movable mounting blocks 9 on the side near the sliding guide rails 8 for sliding in cooperation with the two sets of sliding guide rails 8. The first set of movable mounting blocks 9 is slidably engaged with the first set of sliding guide rails 8, and the second set of movable mounting blocks 9 is slidably engaged with the second set of sliding guide rails 8.

[0035] The symmetrical arrangement of two sets of sliding guide rails 8 on both sides of the first lead screw 6 provides balanced support for the slider 4, effectively counteracting the radial force and overturning moment generated during the lead screw transmission. Combined with the precise fit between the movable mounting block 9 and the guide rail, it can significantly reduce the frictional resistance and sway of the slider 4 during movement, avoid jamming problems, and further improve the straightness and positioning accuracy of the feed motion, providing a reliable guarantee for the stable grinding of the head 2.

[0036] The feeding device also includes a second moving mechanism 11, wherein the first moving mechanism 1 is arranged to move left and right back and forth in the second moving mechanism 11 to adjust the head 2 to move closer to or away from the external workpiece to be ground for grinding operations.

[0037] The second moving mechanism 11 includes a second driving member 12, a second lead screw member 13 connected to the output end of the second driving member 12, and a second lead screw nut 14 fixed to the base 3 and meshing with the second lead screw member 13. The first moving mechanism 1 is slidably disposed on the second lead screw member 13. The second driving member 12 is used to drive the second lead screw member 13 to rotate, and the first moving mechanism 1 is driven to move back and forth by the threaded engagement between the second lead screw nut 14 and the second lead screw member 13.

[0038] During operation, the second drive component 12 drives the second lead screw component 13 to rotate. With the help of the thread transmission between the second lead screw nut 14 and the second lead screw component 13, the first moving mechanism 1 and the machine head 2 mounted on it are driven to move back and forth along the axis of the second lead screw component 13. Combined with the up and down feed achieved by the first moving mechanism 1, the machine head 2 can be adjusted in multiple directions to adapt to the grinding requirements.

[0039] The feeding device also includes a dust cover 15, which is provided in two sets. The first set of dust covers 15 is installed on the first moving mechanism 1, and the second set of dust covers 15 is installed on the second moving mechanism 11.

[0040] Both the first set of dust covers 15 and the second set of dust covers 15 are accordion-type telescopic dust covers 15. The telescopic direction of the first set of dust covers 15 is consistent with the up-and-down reciprocating motion direction of the first moving mechanism 1, and the telescopic direction of the second set of dust covers 15 is consistent with the left-and-right reciprocating motion direction of the second moving mechanism 11.

[0041] The first set of dust covers 15 is installed outside the first moving mechanism 1, and the second set of dust covers 15 is installed outside the second moving mechanism 11. Both sets of dust covers 15 adopt an accordion-style telescopic dust cover structure. The telescopic direction of the first set of dust covers 15 is consistent with the up-and-down reciprocating motion direction of the first moving mechanism 1, and the telescopic direction of the second set of dust covers 15 is adapted to the left-and-right reciprocating motion direction of the second moving mechanism 11. Its beneficial effect is that the accordion-style telescopic dust covers 15 have good telescopic adaptability and can telescopically extend and retract synchronously with the movement of the corresponding moving mechanism without affecting the normal feed. It can effectively prevent metal chips, dust and coolant generated during grinding operations from entering the interior of the moving mechanism, avoiding wear and jamming problems of core transmission components such as guide rails and lead screws due to foreign matter adhesion. At the same time, the sealing and protection characteristics extend the service life of the moving mechanism, reduce the frequency of equipment maintenance, and indirectly ensure the operational stability of the feed device and the grinding accuracy.

[0042] Two sets of elastic telescopic covers 16 are fitted on the first lead screw component 6. The first lead screw nut 7 is located between the two sets of elastic telescopic covers 16. One end of the elastic telescopic cover 16 is fixed on the base 3, and the other end is fixed on the first lead screw nut 7.

[0043] Two sets of elastic telescopic covers 16 are fitted onto the first lead screw 6. The two sets of elastic telescopic covers 16 are located on both sides of the first lead screw nut 7, which is threadedly engaged with the first lead screw 6. One end of each elastic telescopic cover 16 is fixed to the base 3 of the first moving mechanism 1, and the other end is fixed to the first lead screw nut 7. The beneficial effect is that the elastic telescopic cover 16 can expand and contract synchronously with the movement of the first lead screw nut 7. It will not interfere with the rotation of the first lead screw 6 and the reciprocating motion of the slider 4. It can also completely cover the part of the first lead screw 6 located between the base 3 and the first lead screw nut 7, effectively preventing the chips, dust and coolant generated by grinding from contacting the thread surface of the lead screw. This avoids the problem of wear, jamming or reduced transmission accuracy caused by foreign objects intruding into the threaded meshing part, and significantly extends the service life of the first lead screw 6 and the first lead screw nut 7. At the same time, the elastic structure has good fatigue resistance and can be adapted to long-term reciprocating motion scenarios, further ensuring the stability and reliability of the feed device transmission.

[0044] The dust cover 15 is installed using a two-end positioning method of "fixed end + follower end". The fixed end of the first set of dust covers 15 is fastened to the base 3 (fixed component) of the first moving mechanism 1 with bolts, while the follower end is fixed to the slider 4 (moving component) of the first moving mechanism 1 with a snap-fit ​​or threaded connector to ensure that it moves up and down synchronously with the slider 4. The fixed end of the second set of dust covers 15 is rigidly connected to the grinding machine frame (or the fixed base of the second moving mechanism 11), while the follower end is fixed to the base 3 (the component that moves relative to the second moving mechanism 11) of the first moving mechanism 1 to accommodate reciprocating motion in the left and right directions. During installation, it is necessary to ensure that the dust cover 15 is parallel to the movement direction of the corresponding moving mechanism, and that the connecting surface is flat and fits snugly to avoid installation deviations that may cause extension and contraction jamming. If necessary, sealing strips can be added at the joints to enhance the protective effect.

[0045] The first driving component 5 and the second driving component 12 are servo motors, and the output shaft of the servo motor is connected to the first lead screw 6 or the second lead screw 13 through a flexible coupling.

[0046] Servo motors possess high-precision speed and position control capabilities, enabling precise adjustment of the rotation angle and speed of the lead screw, providing accurate power support for the feed motion. Meanwhile, flexible couplings effectively buffer installation deviations, vibrations, and impact loads between the motor output shaft and the lead screw, avoiding stress concentration and wear of components caused by rigid connections. They also reduce the impact of vibration transmission on transmission accuracy, ensuring smooth cooperation between the drive components and the lead screw transmission system, further enhancing the operational stability and positioning accuracy of the entire feed device, and adapting to the needs of high-precision grinding.

[0047] The machine head 2 is equipped with a vibration sensor 17. When the vibration sensor 17 detects abnormal vibration of the main shaft 18, the external control center controls the first moving mechanism 1, the second moving mechanism 11 and the machine head 2 to stop running.

[0048] A vibration sensor 17 is installed on the head 2 of the device. This vibration sensor 17 establishes a signal connection with the external control center and is specifically used to monitor the vibration status of the spindle 18 of the head 2 in real time. When the vibration sensor 17 detects that the vibration parameters of the spindle 18 exceed the preset normal range, it immediately transmits the abnormal signal to the external control center, which then quickly issues a control command to simultaneously control the first moving mechanism 1, the second moving mechanism 11, and the head 2 to stop operating. The beneficial effect is that the vibration sensor 17 enables real-time monitoring of the operating status of the spindle 18, which can promptly capture potential fault risks such as abnormal vibration, avoid quality problems such as out-of-tolerance surface accuracy and scratches on the workpiece due to abnormal vibration of the spindle 18. At the same time, the rapid shutdown can prevent the abnormal vibration from aggravating irreversible damage to the head 2, moving mechanism, and other core components, effectively reducing equipment maintenance costs and production losses, providing reliable safety assurance for grinding operations, and improving the safety and intelligence level of the device operation.

[0049] The machine head 2 includes a main shaft 18, a first grinding wheel 19 and a second grinding wheel 21 respectively disposed on both sides of the main shaft 18. The grinding wheel includes a grinding disc and a rotary drive component for driving the grinding disc to rotate.

[0050] The core of the machine head 2 includes a spindle 18 and a first grinding wheel 19 and a second grinding wheel 21 respectively mounted on both sides of the spindle 18. The two sets of grinding wheels have the same structure, both consisting of a grinding disc for directly grinding the workpiece and a rotary drive component that provides power to the grinding disc. The rotary drive component is connected to the grinding disc to drive it to rotate at high speed, and works in conjunction with the first and second moving mechanisms 11 to drive the precise displacement of the machine head 2 to complete the grinding operation.

[0051] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A linear feed device for a CNC grinding machine, characterized in that: The device includes a first moving mechanism (1) and a head (2) mounted on the first moving mechanism (1), the head (2) being used to perform grinding operations; the first moving mechanism (1) includes a base (3), a slider (4), a guide mechanism, and a drive mechanism; the slider (4) is slidably engaged with the guide mechanism; the head (2) is fixed to the slider (4); the drive mechanism includes a first drive member (5), a first lead screw member (6) connected to the output end of the first drive member (5), and a first lead screw nut (7), the first lead screw... The nut (7) is threadedly engaged with the first lead screw (6), and the slider (4) is slidably set on the base (3) through the guide mechanism and the slider (4) is fixedly connected with the first lead screw nut (7). The guide mechanism is arranged parallel to the first lead screw (6). The first driving member (5) is used to drive the first lead screw (6) to rotate. Through the threaded engagement between the first lead screw nut (7) and the first lead screw (6), the slider (4) is driven to move up and down along the guide mechanism, thereby driving the machine head (2) to approach or move away from the external workpiece to be ground for grinding operations.

2. The linear feed device for a CNC grinding machine according to claim 1, characterized in that: The guiding mechanism includes two sets of sliding guide rails (8), a first lead screw (6) is located between the two sets of sliding guide rails (8), and the slider (4) is provided with two sets of movable mounting blocks (9) on the side near the sliding guide rails (8) for sliding with the two sets of sliding guide rails (8). The first set of movable mounting blocks (9) slides with the first set of sliding guide rails (8), and the second set of movable mounting blocks (9) slides with the second set of sliding guide rails (8).

3. The linear feed device for a CNC grinding machine according to claim 1, characterized in that: The feeding device also includes a second moving mechanism (11), wherein the first moving mechanism (1) is reciprocated left and right and is arranged in the second moving mechanism (11) to adjust the head (2) to move closer to or away from the external workpiece to be ground for grinding operations.

4. The linear feed device for a CNC grinding machine according to claim 3, characterized in that: The second moving mechanism (11) includes a second driving member (12), a second lead screw member (13) connected to the output end of the second driving member (12), and a second lead screw nut (14) fixed to the base (3) and meshing with the second lead screw member (13). The first moving mechanism (1) is slidably disposed on the second lead screw member (13). The second driving member (12) is used to drive the second lead screw member (13) to rotate, and the first moving mechanism (1) is driven to move back and forth by the threaded engagement between the second lead screw nut (14) and the second lead screw member (13).

5. A linear feed device for a CNC grinding machine according to claim 4, characterized in that: The feeding device also includes a dust cover (15), which is provided in two sets. The first set of dust covers (15) is placed on the first moving mechanism (1), and the second set of dust covers (15) is placed on the second moving mechanism (11).

6. The linear feed device for a CNC grinding machine according to claim 5, characterized in that: The first set of dust covers (15) and the second set of dust covers (15) are both accordion-type telescopic dust covers (15). The telescopic direction of the first set of dust covers (15) is consistent with the up-down reciprocating motion direction of the first moving mechanism (1), and the telescopic direction of the second set of dust covers (15) is consistent with the left-right reciprocating motion direction of the second moving mechanism (11).

7. The linear feed device for a CNC grinding machine according to claim 1, characterized in that: Two sets of elastic telescopic covers (16) are fitted on the first lead screw component (6). The first lead screw nut (7) is located between the two sets of elastic telescopic covers (16). One end of the elastic telescopic cover (16) is fixed on the base (3), and the other end is fixed on the first lead screw nut (7).

8. A linear feed device for a CNC grinding machine according to claim 4, characterized in that: The first driving component (5) and the second driving component (12) are servo motors, and the output shaft of the servo motor is connected to the first lead screw component (6) or the second lead screw component (13) through a flexible coupling.

9. A linear feed device for a CNC grinding machine according to claim 3, characterized in that: The machine head (2) is equipped with a vibration sensor (17). When the vibration sensor (17) detects abnormal vibration of the spindle (18), the external control center controls the first moving mechanism (1), the second moving mechanism (11) and the machine head (2) to stop running.

10. A linear feed device for a CNC grinding machine according to claim 1, characterized in that: The machine head (2) includes a main shaft (18), a first grinding wheel (19) and a second grinding wheel (21) respectively disposed on both sides of the main shaft (18). The grinding wheel includes a grinding disc and a rotary drive for driving the grinding disc to rotate.

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