Grinding wheel spindle angle precision adjusting mechanism and method of centerless grinding machine
By designing a support base, adjustment base, and angle detection mechanism on a centerless grinder, and using laser and motor drive to achieve precise angle adjustment of the grinding wheel spindle, the problem of complex and inaccurate grinding wheel angle adjustment operation in the prior art is solved, ensuring the machining accuracy of external threads is ensured.
Patent Information
- Application Number
- CN202512026844.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-03-03
AI Technical Summary
Existing grinding wheels are cumbersome and have poor precision when machining external threads, resulting in the external thread lead not meeting requirements.
Design a precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder, including a support base, an adjustment base, an angle adjustment mechanism, and an angle detection mechanism. Precise angle adjustment is achieved through a laser emitter and a marking plate, stable drive is achieved using a geared motor and drive gears, and real-time detection and feedback adjustment are achieved in conjunction with an electronic inclinometer.
It achieves precise matching of the angle between the grinding wheel spindle axis and the workpiece axis, ensuring that the external thread lead meets the requirements, and improving machining accuracy and ease of operation.
Smart Images
Figure CN121589376A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of machining technology, specifically to a precision adjustment mechanism and method for the grinding wheel spindle angle of a centerless grinder. Background Technology
[0002] Currently, two main technical solutions are used for high-precision grinding of external threads. The first type is thread grinding machines based on the principle of centered thread grinding. These machines use a spindle center and a tailstock center to clamp both ends of the workpiece. The spindle drives the workpiece to rotate, and the grinding wheel head performs axial feed motion according to the lead. The second type is thread grinding machines based on the traditional principle of centerless grinding. These machines use a grinding wheel, an adjusting wheel, and a workpiece support plate to support and drive the workpiece. The workpiece is driven to move in a helical motion by the tilting adjusting wheel. In both of these methods, the lead of the thread to be machined is adjusted by adjusting the tilt angle of the grinding wheel. However, adjusting the machining angle of the existing grinding wheel is relatively cumbersome and has poor adjustment accuracy, which leads to the external thread lead not meeting the requirements. Summary of the Invention
[0003] The present invention aims to solve the problems existing in the prior art by providing a precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder. This mechanism can precisely adjust the grinding wheel spindle angle and has a simple structure and convenient operation, so as to meet the machining requirements of the corresponding external thread lead.
[0004] The technical solution adopted by this invention to solve its technical problem is as follows: A precision adjustment mechanism for the grinding wheel spindle angle of this centerless grinder includes a support base for mounting the grinding wheel spindle and an adjusting base for rotatably mounting the support base. The adjusting base is equipped with an angle adjustment mechanism for driving the support base to rotate the axis of the grinding wheel spindle. The support base is equipped with an angle detection mechanism for detecting the rotation angle of the support base. The angle adjustment mechanism drives the support base to rotate to adjust the angle between the axis of the grinding wheel spindle and the axis of the workpiece to be processed. The angle detection mechanism detects the angle and further drives the angle adjustment mechanism to achieve negative feedback adjustment of the angle. In this application, the support base drives the grinding wheel spindle to rotate for adjustment, and an angle detection mechanism is provided on the support base. By detecting the rotation angle of the support base through the angle detection mechanism, the rotation angle of the support base can be further adjusted with negative feedback, thereby ensuring accurate rotation of the support base angle and ensuring that the lead of the external thread processed by the grinding wheel meets the requirements.
[0005] Preferably, the support base includes a seat body with an internal mounting cavity, the grinding wheel spindle is located in the mounting cavity and the axis of the grinding wheel spindle is set on the rotation plane of the support base, the outer side of the seat body is provided with an arc-shaped rotational contact surface, and the adjusting seat is provided with an arc-shaped support groove corresponding to the arc-shaped rotational contact surface. The seat body is rotatably connected to the adjusting seat through the arc-shaped rotational contact surface and the arc-shaped support groove, and the axis of the grinding wheel spindle is adjusted and rotated on the rotation plane of the support base by the seat body. The support base is rotatably supported on the arc-shaped support groove of the adjusting seat through the arc-shaped rotational contact surface on the outer side of the seat body, thereby making the support base stable as a whole and relatively simple in structure when rotating.
[0006] Preferably, the angle detection mechanism includes a laser emitter that rotates with the support and whose emission direction is set on the rotation plane of the support; an auxiliary aiming device set on the support and spaced apart from the emission end of the laser emitter; and an indicator plate set relatively far from the laser emitter for illuminating and displaying the laser emitted by the laser emitter. The indicator plate is provided with an angle scale located on the rotation plane of the support, and is equipped with the laser emitter and the indicator plate for displaying the laser position. The rotation of the support causes the laser emitter to rotate, thereby causing the laser position on the indicator plate to move. In this way, the accuracy of the rotation angle of the support can be quickly identified from the laser position on the indicator plate. Furthermore, the detection accuracy of the angle detection mechanism can be further increased by increasing the distance between the laser emitter and the indicator plate, thereby fully ensuring the accuracy of the support angle adjustment.
[0007] Preferably, the angle adjustment mechanism includes a geared motor mounted on the adjustment seat, a drive gear mounted on the output end of the geared motor, and an arc-shaped rack mounted on the outside of the support seat that meshes with the drive gear. The support seat is driven to rotate by the geared motor, the drive gear, and the arc-shaped rack, which can realize the rapid adjustment of the support seat angle and make the adjustment of the support seat stable with small transmission error.
[0008] Preferably, the front end of the base body is provided with a first limiting part that extends downward and is limited to the outside of the adjusting base. The front end of the adjusting base is provided with a first protrusion that extends forward and contacts the first limiting part. The rear end of the first limiting part is provided with a first upper limiting part that extends towards the adjusting base and is located inside the first protrusion, restricting the upward movement of the first protrusion. The first protrusion and the first upper limiting part are respectively arc-shaped structures concentrically arranged with the arc-shaped rotating contact surface. The first protrusion and the first upper limiting part provide auxiliary support. At the same time, the arc-shaped first protrusion and the first upper limiting part can further improve the positioning and installation accuracy of the support base relative to the adjusting base, making the coaxiality of the support base and the adjusting base higher, thereby improving the detection accuracy of the angle detection mechanism.
[0009] Preferably, the rear end of the adjusting seat is provided with a second limiting part that extends inward and is limited to the outside of the seat body, and the rear end of the seat body is provided with a second protrusion that extends backward and contacts the second limiting part. The front end of the second limiting part is provided with a second upper limiting part that extends towards the seat body and is located inside the second protrusion, limiting the upward movement of the second protrusion. The second protrusion and the second upper limiting part are respectively arc-shaped structures concentrically arranged with the arc-shaped rotating contact surface. The functions of the second protrusion and the second upper limiting part are the same as those of the first protrusion and the first upper limiting part, which provide auxiliary support to the support seat and make the coaxiality of the support seat and the adjusting seat higher.
[0010] Preferably, the angle detection mechanism includes an electronic inclinometer mounted on the support base. To make it more convenient to detect the rotation angle of the support base, the angle can be directly detected by the electronic inclinometer.
[0011] Preferably, the front end of the adjusting seat is detachably connected to a pressing part located outside the first limiting part, which causes the first limiting part to contact and limit the first protrusion.
[0012] Preferably, the contact surfaces of the first upper limit portion and the first protrusion are both inclined contact surfaces whose diameter gradually increases from the inside to the outside.
[0013] Preferably, a method for adjusting the precision adjustment mechanism of the grinding wheel spindle angle of a centerless grinder includes the following steps: 1) Installation: The grinding wheel spindle is set horizontally in the support base, and the support base is supported on the upper end of the adjusting seat. The laser emitter and auxiliary aiming device are installed on the upper end of the support base. A marker plate is set in the direction of the laser emitter's light output, and the distance between the marker plate and the laser emitter is greater than 6 meters. 2) Calibration: Turn on the laser emitter and adjust its position so that the laser emitted by the laser emitter passes through the central circular hole of the auxiliary aiming device and illuminates the 0° position of the center of the marking plate; start the angle adjustment mechanism to drive the support base to rotate relative to the adjustment base by a certain angle. The support base drives the laser emitter to rotate on the rotation plane, thereby causing the light emitted by the laser emitter to be deflected upward or downward relative to the marking plate. Then, the working accuracy of the angle adjustment mechanism is calibrated by the angle value corresponding to the light on the angle scale. 3) Spindle angle adjustment: After calibration in step 2), the support seat is rotated again by the angle adjustment mechanism during operation, so that the angle between the axis of the grinding wheel spindle on the support seat and the axis of the workpiece to be processed is the set value.
[0014] The beneficial effects of this invention are as follows: This invention enables the support base to drive the grinding wheel spindle to rotate and adjust, and an angle detection mechanism is provided on the support base. The angle detection mechanism detects the rotation angle of the support base, thereby allowing for further negative feedback adjustment of the rotation angle. Specifically, the angle detection mechanism, through the rotation of the support base, drives the laser emitter to rotate, causing the laser position on the marking plate to move. This allows for rapid identification of whether the rotation angle of the support base is accurate from the laser position on the marking plate. Furthermore, the detection accuracy of the angle detection mechanism can be further increased by increasing the distance between the laser emitter and the marking plate, thus ensuring accurate adjustment of the support base angle and guaranteeing that the external thread lead of the grinding wheel meets the requirements. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Enlarged view of section A; Figure 3 This is a schematic diagram of the installation of the support base and the adjustment base; Figure 4 This is a schematic diagram of the structure when an electronic inclinometer is installed on the support base.
[0016] Figure descriptions: 1. Grinding wheel; 2. Support base; 3. Adjustment base; 4. Angle adjustment mechanism; 5. Mounting cavity; 2-1. Seat body; 2-2. Arc-shaped rotating contact surface; 3-1. Arc-shaped support groove; 6. Laser emitter; 7. Auxiliary aiming device; 8. Marking plate; 4-1. Gear motor; 4-2. Drive gear; 4-3. Arc-shaped rack; 9. First limiting part; 10. First protrusion; 11. First upper limit part; 12. Second limiting part; 13. Second protrusion; 14. Second upper limit part; 15. Electronic inclinometer; 16. Pressing part; 17. Inclined contact surface. Detailed Implementation
[0017] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0018] Combined with appendix Figure 1 As shown, this embodiment discloses a precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder. Its function is to precisely adjust the machining angle of the grinding wheel spindle during external thread grinding of a workpiece by the centerless grinder, ensuring that the angle between the axis of the grinding wheel spindle and the axis of the workpiece precisely matches the required thread lead, thereby enabling the machining of an external thread with the required helix angle on the workpiece. Figure 1 and Figure 4As shown, the precision adjustment mechanism for the grinding wheel spindle angle in this embodiment includes a support 2 for mounting the grinding wheel 1 spindle and an adjusting seat 3 for rotatably mounting the support 2, so that the support 2, on which the grinding wheel 1 spindle is mounted, is rotatably mounted on the adjusting seat 3. The adjusting seat 3 is provided with an angle adjustment mechanism 4 for driving the support 2 to rotate the axis of the grinding wheel 1 spindle. During machining operations, the axis position of the workpiece to be machined is fixed. In this embodiment, the axis of the workpiece can be horizontally positioned. The angle adjustment mechanism 4 drives the support 2 to rotate to adjust the angle between the axis of the grinding wheel 1 spindle and the axis of the workpiece to be machined. Furthermore, to make the angle adjustment of the grinding wheel 1 spindle axis more accurate, such as... Figure 1 and Figure 4 As shown, in this embodiment, an angle detection mechanism is provided on the support base 2 for detecting the rotation angle of the support base 2. Then, the angle detection mechanism detects and drives the angle adjustment mechanism 4 to further adjust in order to achieve negative feedback adjustment of the included angle (i.e., closed-loop feedback adjustment).
[0019] Among them, such as Figure 4 As shown, the corresponding angle detection mechanism can also be an electronic inclinometer 15 mounted on the support base 2. The electronic inclinometer 15 detects the rotation angle of the support base 2 and the grinding wheel 1 spindle, and then further controls the angle adjustment mechanism 4 to drive the support base 2 to rotate, so that the grinding wheel 1 spindle on the support base 2 is set at a corresponding tilt angle, thereby making the angle between the grinding wheel 1 spindle and the axis of the workpiece to be processed a set value. Furthermore, since the electronic inclinometer 15 has installation and detection errors during use, in order to further improve the detection accuracy of the angle detection mechanism, this embodiment further designs another angle detection mechanism, such as... Figure 1As shown, the new angle detection mechanism may include a laser emitter 6 that rotates with the support 2 and whose emission direction is set on the rotation plane of the support 2; an auxiliary aiming device 7 set on the support 2 and spaced apart from the emission end of the laser emitter 6; and an indicator plate 8 set relatively far from the laser emitter 6 for illuminating the laser emitted by the laser emitter 6. The indicator plate 8 is provided with an angle scale located on the rotation plane of the support 2; wherein, the center scale of the corresponding angle scale is 0°, and the angle values on the upper or lower sides are respectively set with gradually changing and pre-adjusted angle values. The auxiliary aiming device 7 has a central hole for the laser to pass through, so that the laser emitter 6, the central hole and the angle scale are on the same straight line, so that the laser of the laser emitter 6 is emitted from the central hole of the auxiliary aiming device 7 and hits the 0° position of the angle scale on the indicator plate 8; when the support 2 drives the grinding wheel 1 When the spindle is rotated for adjustment, the angle adjustment mechanism 4 drives the support base 2 to rotate relative to the adjustment base 3, causing the laser position on the marking plate 8 to move up or down along the angle scale. This visually indicates the angle between the grinding wheel 1 spindle on the support base 2 and the axis of the workpiece. The angle adjustment mechanism 4 can then be further controlled to rotate the support base 2, ensuring the laser position on the marking plate 8 hits the corresponding angle on the angle scale. The angle between the grinding wheel 1 spindle on the support base 2 and the axis of the workpiece is the angle corresponding to the laser position. Furthermore, to further reduce measurement errors, the distance between the marking plate 8 and the laser emitter 6 can be increased. This increases the distance the laser emitter 6 moves on the marking plate 8 when the support base 2 rotates by the same angle, allowing for further subdivision of the distance the laser emitter 6 hits on the marking plate 8, resulting in higher rotational accuracy for the support base 2.
[0020] Furthermore, such as Figure 3 As shown, in this embodiment, the support base 2 includes a base body 2-1 with an internal mounting cavity 5. The grinding wheel 1 spindle is located within the mounting cavity 5, and the axis of the grinding wheel 1 spindle is positioned on the rotation plane of the support base 2. An arc-shaped rotating contact surface 2-2 is provided on the outer side of the base body 2-1. An arc-shaped support groove 3-1, corresponding to the arc-shaped rotating contact surface 2-2, is provided on the adjusting base 3. The base body 2-1 is rotatably connected to the adjusting base 3 via the arc-shaped rotating contact surface 2-2 and the arc-shaped support groove 3-1. When adjusting the angle, the axis of the grinding wheel 1 spindle is relatively horizontally positioned on the rotation plane of the support base 2. The base body 2-1 drives the axis of the grinding wheel 1 spindle to rotate on the rotation plane of the support base 2, thereby relatively changing the angle between the axis of the grinding wheel 1 spindle and the axis of the workpiece to be processed. Furthermore, as... Figure 3As shown, in order to achieve stable installation and rotation of the support base 2, the front end of the base 2-1 in this embodiment is provided with a first limiting part 9 extending downward and limited to the outside of the adjusting base 3. The front end of the adjusting base 3 is provided with a first protrusion 10 extending forward and contacting the first limiting part 9. The rear end of the first limiting part 9 is provided with a first upper limit part 11 extending towards the adjusting base 3 and located inside the first protrusion 10, restricting the upward movement of the first protrusion 10. Thus, the first upper limit part 11 is restricted to move upward by the first protrusion 10, thereby preventing the front end of the support base 2 from detaching upward from the adjusting base 3; similarly, as Figure 3 As shown, in this embodiment, a second limiting part 12 extending inward and limited to the outside of the seat body 2-1 is provided at the rear end of the adjusting seat 3. A second protrusion 13 extending rearward and contacting the second limiting part 12 is provided at the rear end of the seat body 2-1. A second upper limiting part 14 extending towards the seat body 2-1 and located inside the second protrusion 13 is provided at the front end of the second limiting part 12, limiting the upward movement of the second protrusion 13. Thus, the second upper limiting part 14 is restricted to move upward by the second protrusion 13, thereby preventing the rear end of the support seat 2 from detaching from the adjusting seat 3. Furthermore, in this embodiment, the first protrusion 10 and the first upper limiting part 11 are respectively connected to the arc-shaped rotating joint. The contact surfaces 2-2 are concentrically arranged arc-shaped structures. The second protrusion 13 and the second upper limit part 14 are also concentrically arranged arc-shaped structures with the arc-shaped rotating contact surfaces 2-2. Therefore, the first protrusion 10 and the first upper limit part 11, the second protrusion 13 and the second upper limit part 14 can provide auxiliary support for the support base 2. Simultaneously, the first protrusion 10 and the first upper limit part 11, the second protrusion 13 and the second upper limit part 14 of the arc-shaped structure can further improve the positioning and installation accuracy of the support base 2 relative to the adjusting base 3, resulting in higher coaxiality between the support base 2 and the adjusting base 3, thereby improving the detection accuracy of the angle detection mechanism. Figure 2 As shown, the rear end of the support base 2 is limited by the second limiting part 12. In this embodiment, in order to prevent the support base 2 from coming out forward, a pressing part 16 is detachably connected to the front end of the adjusting base 3. This pressing part 16 is located outside the first limiting part 9, so that the first limiting part 9 contacts and limits the first protrusion 10. Specifically, the pressing part 16 includes a contact part 16-1 provided parallel to the front end face of the first limiting part 9, a fixing bolt 16-2 that passes through the contact part 16-1 and presses the contact part 16-1 against the front end face of the first limiting part 9 and is threaded to the front end of the adjusting base 3, and a fixing part 16-3 provided on the side of the contact part 16-1 away from the first limiting part 9 and pressing against the front side of the adjusting base 3. Thus, the force of the support base 2 coming out forward acts on the contact part 16-1 and is further transmitted to the adjusting base 3 through the fixing part 16-3, thereby making the support base 2 fixed and stable.
[0021] Furthermore, such as Figure 3As shown, the angle adjustment mechanism 4 in this embodiment may include a reduction motor 4-1 mounted on the adjustment seat 3, a drive gear 4-2 mounted on the output end of the reduction motor 4-1, and an arc-shaped rack 4-3 mounted on the outside of the support seat 2 and meshing with the drive gear 4-2. The reduction motor 4-1 and the drive gear 4-2 drive the arc-shaped rack 4-3 to rotate, thereby causing the support seat 2 to rotate on the adjustment seat 3.
[0022] Furthermore, such as Figure 2 As shown, in this embodiment, the contact surfaces of the first upper limit portion 11 and the first protrusion portion 10 are both inclined contact surfaces 17 whose diameter gradually increases from the inside to the outside. At the same time, since the first upper limit portion 11 and the first protrusion portion 10 are both arc-shaped structures, the contact limiting area between the first upper limit portion 9 and the first protrusion portion 10 is increased, and the coaxiality of the support seat 2 and the adjustment seat 3 is further improved.
[0023] This embodiment also discloses an adjustment method for a precision adjustment mechanism of the grinding wheel spindle angle of a centerless grinder, including the following steps: 1) Installation: The spindle of the grinding wheel 1 is horizontally set inside the support seat 2, and the support seat 2 is supported on the upper end of the adjusting seat 3. The laser emitter 6 and the auxiliary aiming device 7 are installed on the upper end of the support seat 2. The marking plate 8 is set in the direction of the laser emitter 6, and the distance between the marking plate 8 and the laser emitter 6 is greater than 6 meters. 2) Calibration: Turn on the laser emitter 6 and adjust its position so that the laser emitted by the laser emitter 6 passes through the central circular hole of the auxiliary aiming device 7 and illuminates the 0° position of the center of the marking plate 8; start the angle adjustment mechanism 4 to drive the support base 2 to rotate relative to the adjustment base 3 by a certain angle. The support base 2 drives the laser emitter 6 to rotate on the rotation plane, thereby causing the light emitted by the laser emitter 6 onto the marking plate 8 to be relatively deflected upward or downward. Then, the working accuracy of the angle adjustment mechanism 4 is calibrated by the angle corresponding to the light on the angle scale. Spindle angle adjustment: After calibration in step 2, the support seat 2 is driven to rotate again by the angle adjustment mechanism 4 during operation, so that the included angle between the spindle axis of the grinding wheel 1 on the support seat 2 and the axis of the workpiece to be processed is the set value.
[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder, characterized in that, It includes a support seat (2) for mounting the spindle of the grinding wheel (1) and an adjustment seat (3) for rotating the support seat (2). The adjustment seat (3) is provided with an angle adjustment mechanism (4) for driving the support seat (2) to rotate the axis of the spindle of the grinding wheel (1). The support seat (2) is provided with an angle detection mechanism for detecting the rotation angle of the support seat (2). The angle adjustment mechanism (4) drives the support seat (2) to rotate to adjust the included angle between the axis of the spindle of the grinding wheel (1) and the axis of the workpiece to be processed. The angle detection mechanism detects the angle adjustment mechanism (4) and further drives the angle adjustment mechanism (4) to adjust it to achieve negative feedback adjustment of the included angle.
2. The precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder according to claim 1, characterized in that, The support base (2) includes a base body (2-1) with an internal mounting cavity (5). The main shaft of the grinding wheel (1) is located in the mounting cavity (5) and the axis of the main shaft of the grinding wheel (1) is set on the rotation plane of the support base (2). An arc-shaped rotating contact surface (2-2) is provided on the outer side of the base body (2-1). An arc-shaped support groove (3-1) corresponding to the arc-shaped rotating contact surface (2-2) is provided on the adjustment base (3). The base body (2-1) is rotatably connected to the adjustment base (3) through the arc-shaped rotating contact surface (2-2) and the arc-shaped support groove (3-1). The main shaft axis of the grinding wheel (1) is adjusted and rotated on the rotation plane of the support base (2) through the base body (2-1).
3. The precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder according to claim 1, characterized in that, The angle detection mechanism includes a laser emitter (6) that rotates with the support (2) and whose emission direction is set on the rotation plane of the support (2), an auxiliary aiming device (7) set on the support (2) and spaced apart from the emission end of the laser emitter (6), and an indicator plate (8) set relatively far away from the laser emitter (6) for irradiation display of the laser emitted by the laser emitter (6). The indicator plate (8) is provided with an angle scale located on the rotation plane of the support (2).
4. A precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder according to claim 1 or 2, characterized in that, The angle adjustment mechanism (4) includes a speed reduction motor (4-1) mounted on the adjustment seat (3), a drive gear (4-2) mounted on the output end of the speed reduction motor (4-1), and an arc-shaped rack (4-3) mounted on the outside of the support seat (2) and meshing with the drive gear (4-2).
5. The precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder according to claim 2, characterized in that, The front end of the seat (2-1) is provided with a first limiting part (9) that extends downward and is limited to the outside of the adjusting seat (3). The front end of the adjusting seat (3) is provided with a first protrusion (10) that extends forward and contacts the first limiting part (9). The rear end of the first limiting part (9) is provided with a first upper limit part (11) that extends toward the adjusting seat (3) and is located inside the first protrusion (10) to restrict the first protrusion (10) from moving upward. The first protrusion (10) and the first upper limit part (11) are respectively arc-shaped structures that are concentrically arranged with the arc-shaped rotating contact surface (2-2).
6. A precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder according to claim 2 or 5, characterized in that, The rear end of the adjustment seat (3) is provided with a second limiting part (12) extending inward and limited to the outside of the seat body (2-1). The rear end of the seat body (2-1) is provided with a second protrusion (13) extending backward and contacting the second limiting part (12). The front end of the second limiting part (12) is provided with a second upper limit part (14) extending towards the seat body (2-1) and located inside the second protrusion (13) to limit the upward movement of the second protrusion (13). The second protrusion (13) and the second upper limit part (14) are respectively arc-shaped structures concentrically arranged with the arc-shaped rotating contact surface (2-2).
7. The precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder according to claim 1, characterized in that, The angle detection mechanism includes an electronic inclinometer (15) mounted on a support base (2).
8. The precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder according to claim 5, characterized in that, The front end of the adjusting seat (3) is detachably connected to a pressing part (16) located outside the first limiting part (9) so that the first limiting part (9) contacts and limits the first protrusion (10).
9. The precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder according to claim 5, characterized in that, The contact surfaces of the first upper limit part (11) and the first protrusion part (10) are both inclined contact surfaces (17) with their diameters gradually increasing from the inside to the outside.
10. The adjustment method of the precision adjustment mechanism for the grinding wheel spindle angle of a centerless grinder according to claim 3, characterized in that, Includes the following steps: Installation: The spindle of the grinding wheel (1) is horizontally set inside the support seat (2), and the support seat (2) is supported on the upper end of the adjusting seat (3). The laser emitter (6) and the auxiliary aiming device (7) are installed on the upper end of the support seat (2). The marking plate (8) is set in the direction of the laser emitter (6) relative to the light output direction of the laser emitter (6). The distance between the marking plate (8) and the laser emitter (6) is greater than 6 meters. Calibration: Turn on the laser emitter (6), adjust the position of the laser emitter (6) so that the laser emitted by the laser emitter (6) passes through the central circular hole of the auxiliary aiming device (7) and illuminates the 0° position of the center of the marking plate (8); start the angle adjustment mechanism (4) to drive the support base (2) to rotate a certain angle relative to the adjustment base (3), the support base (2) drives the laser emitter (6) to rotate on the rotation plane, thereby causing the light emitted by the laser emitter (6) onto the marking plate (8) to be relatively offset upward or downward, and then calibrate the working accuracy of the angle adjustment mechanism (4) by the angle corresponding to the light on the angle scale; Spindle angle adjustment: After calibration in step 2), the support seat (2) is rotated again by the angle adjustment mechanism (4) during operation, so that the angle between the spindle axis of the grinding wheel (1) on the support seat (2) and the axis of the workpiece to be processed is the set value.