Large-range spherical arc grinding wheel dressing device

Abstract

The invention belongs to the technical field of grinding wheel dressing machining, and provides a large-range spherical arc grinding wheel dressing device. The trimming device comprises a diamond pen and a rotating arm, the rotating arm is in an arch shape, a first through hole perpendicular to the extending direction of the rotating arm is formed in the middle of the arch shape of the rotating arm, the two ends of the arch shape of the rotating arm are located on the same vertical straight line, and the trimming device further comprises a positioning device with one end for fixing the diamond pen. The end, away from the diamond pen, of the positioning device can adjust the relative position of the diamond pen and the swing axis of the rotating arm. Through the arrangement, the feeding amount of the diamond pen can be adjusted in a large range, large-range curvature radius dressing is achieved, and the adaptability of the grinding wheel dressing device is improved; cutting force can be monitored in real time, and the abrasion state of the diamond pen is indirectly judged; the feeding precision of the diamond pen is improved, and stepless adjustment of the relative positions of the diamond pen and the swing axis of the rotating arm is achieved.

Description

Technical Field

[0001] This invention relates to the field of grinding wheel dressing technology, and provides a large-range spherical arc grinding wheel dressing device. Background Technology

[0002] Spherical arc dressing devices can be used for machining spherical rollers. When machining spherical rollers, the arc surface of the grinding wheel needs to be adjusted according to different spherical radii. Existing spherical arc grinding wheel dressing devices typically employ a single-arm support structure. Due to spatial limitations, this type of support structure results in a small dressing range, numerous tooling parts, and difficult management, failing to meet the processing needs of a wide range of technical requirements. Existing technology CN 104149031A provides a swing arm support structure for an arc dresser, which ensures that the upper and lower ends of the swing arm are located on the same vertical axis. This prevents the machining accuracy of the dresser base from affecting the movement trajectory of the diamond pen, resulting in lower manufacturing costs for the arc dresser. It includes a dressing base, a swing arm, and a diamond pen. The diamond pen is arranged in the middle of the swing arm. The upper and lower ends of the swing arm are respectively located in the upper and lower mounting cavities of the dressing base. The characteristic is that the protruding positions of the upper and lower ends of the swing arm are respectively provided with concave truncated cone holes. A steel ball structure is arranged in the truncated cone holes. The steel ball structure specifically includes an upper steel ball and a lower steel ball. The outer ring of the upper pressure cap is fastened to the upper wall of the upper mounting cavity of the dressing base. The lower center of the upper pressure cap has a concave truncated cone hole. Summary of the Invention

[0003] The purpose of this invention is to allow for a wide range of adjustable feed rates of the diamond dressing tool, enabling extensive curvature radius dressing and improving the adaptability of the grinding wheel dressing device. Secondly, it allows for real-time monitoring of the cutting force, indirectly determining the wear state of the diamond dressing tool; it also improves the feed accuracy of the diamond dressing tool and enables stepless adjustment of the relative position of the diamond dressing tool and the swing axis of the rotating arm.

[0004] A large-range spherical arc grinding wheel dressing device includes a diamond pen and a rotating arm. The rotating arm is bow-shaped, with a first through hole perpendicular to the extension direction of the rotating arm in the middle of the bow shape. The two ends of the bow shape of the rotating arm are located on the same vertical line. The dressing device also includes a diamond pen positioning device fixed at one end. The first through hole accommodates one end of the diamond pen fixed to the positioning device. The end of the positioning device away from the diamond pen has a feed mechanism that can adjust the relative position of the swing axes of the diamond pen and the rotating arm. With the above configuration, the bow-shaped rotating arm ensures that the axis of reciprocating oscillation of the diamond pen is located at the front end of the diamond pen, and the oscillation path of the diamond pen is arc-shaped. The through hole in the middle of the rotating arm provides sufficient forward and backward movement distance for the feed mechanism, thereby enabling a large-range adjustment of the radius of curvature of the diamond pen's oscillation path and achieving large-range spherical arc dressing.

[0005] Preferably, the positioning device has a mounting hole at one end of the diamond pen, with the axis of the diamond pen forming an angle with the axis of the mounting hole. A pressure sensor is located at the bottom of the mounting hole, and a clamping block mechanism that abuts against the pressure sensor is also located inside the mounting hole. The pressure sensor at the bottom of the mounting hole can detect the state and processing condition of the diamond pen. For example, after long-term processing or abnormal processing, the diamond pen's tip becomes dull or chipped due to wear. During dressing, the cutting force with the grinding wheel, whether frictional or normal, will change, especially the normal force, which will change significantly. The more severe the wear, the higher the average amplitude of the cutting force and the greater the fluctuation. Due to the increased contact area of ​​the tip, the cutting efficiency decreases. Installing a strain gauge force sensor between the diamond pen and the feed mechanism can monitor the cutting force in real time and indirectly determine the wear state. Furthermore, when dressing the grinding wheel with a new diamond pen, the stable cutting force range is recorded to avoid interference from factors such as uneven grinding wheel hardness and feed speed fluctuations affecting the judgment of the wear state. The stable cutting force range is used to assist in the judgment. Because the diamond pen is mounted at an angle, its tip can easily cut the rotating grinding wheel. However, this makes it difficult to secure the other end of the tip. A clamping mechanism is used to radially hold and secure the angled diamond pen. This clamping mechanism provides the diamond pen with a flat, fixed end face, reducing the difficulty of securing the angled pen and the detection difficulty of the strain gauge force sensor.

[0006] Preferably, the clamping mechanism includes a first clamping block and a second clamping block that cooperate to clamp the diamond pen. The plane containing the axis of the diamond pen and the axis of the mounting hole separates the first clamping block and the second clamping block. The outer side of the first clamping block has a keyway structure for fixing to the mounting hole, and the second clamping block has a cylindrical pin for fixing the diamond pen. With the above arrangement, the inner holes of the first and second clamping blocks for clamping the diamond pen are symmetrical, which is beneficial for processing and for maintaining force balance when clamping the diamond pen. At the same time, the cylindrical pin of the second clamping block can also apply a balanced fixing force to the diamond pen. The keyway structure of the first clamping block fixes the relative position of the first clamping block in the mounting hole, and the second clamping block and the diamond pen can also be locked in the mounting hole when installed with the first clamping block.

[0007] Preferably, the inner wall of the mounting hole and the clamping mechanism form a cooling channel. The cooling channel intersects the plane containing the axis of the diamond pen and the axis of the mounting hole. The thickness of the clamping mechanism is less than the depth of the mounting hole. The cooling channel formed by the inner wall of the mounting hole and the clamping mechanism can swing with the swinging process of the diamond pen, that is, the cooling channel is stationary relative to the diamond pen. This can effectively avoid the phenomenon of insufficient cooling of the coolant due to the reciprocating oscillation of the diamond pen or the phenomenon of inertial cooling of non-processing areas. The thickness of the clamping block is less than the depth of the mounting hole, so that after the coolant is sprayed out of the cooling channel, the mounting hole restricts it on one side and the diamond pen on the other side. This can constrain and guide the spray path of the coolant, prevent coolant splashing, and guide the coolant to spray towards the processing area for cooling.

[0008] Preferably, the dressing device also includes symmetrical dresser supports on both sides of the rotating arm, with the extension direction of the dresser supports parallel to that of the rotating arm. The ends of the dresser supports are connected by fixing plates. The dresser supports avoid the axial direction of the positioning device, providing the positioning device with greater axial freedom of movement and enabling a wide range of curvature radius dressing. The fixing plates connecting the dresser supports increase and adjust the fixing points, allowing the rotating arm to reciprocate within the interior space of the dresser supports, thus improving the stability of the dresser supports. The dresser supports also block and isolate the sides of the grinding wheel dressing process, isolating some of the sparks generated during dressing and preventing other personnel from accidentally entering the dressing area.

[0009] Preferably, the trimming device also includes a power unit. The rotating arm passes through the fixed plate and is connected to the power unit. The power unit and the rotating arm are located on the same plane, and the power unit can drive the rotating arm to reciprocate. Having the power unit and the rotating arm on the same plane reduces the mass deviating from the trimming device's axis of rotation, lowers the moment of inertia of the trimming device, and facilitates rapid stopping and starting of the trimming device's reciprocating oscillation.

[0010] Preferably, the power unit includes a servo motor, a reducer, and a coupling, with the servo motor connected to the rotating arm via the reducer and coupling. Furthermore, a circular grating ruler can be arranged around the power unit, with its axis collinear with the axis of the rotating arm's oscillation. The circular grating ruler collects the swing angle position signal of the rotating arm and feeds it back to the controller of the power unit, achieving closed-loop position detection. Further, by adding a microcontroller to automatically respond to the swing angle position signal, and in conjunction with the encoder of the servo motor, closed-loop motion control of the rotating arm can be completed, enabling automated dressing of the grinding wheel.

[0011] Preferably, the positioning device has a positioning mechanism at one end where the diamond pen is fixed. The positioning mechanism is perpendicular to the first through hole and can lock the relative position of the diamond pen and the swing axis of the rotating arm. The positioning mechanism includes a locking screw and a nut sleeve that cooperates with the locking screw. The relative position of the locking screw and the rotating arm is fixed, and the locking screw and the nut sleeve clamp and fix the device to prevent it from moving back and forth.

[0012] Preferably, the feeding mechanism includes a feed screw. One end of the feed screw, furthest from the diamond pen, is fixed relative to the rotating arm. The other end of the feed screw can be threaded to drive the relative position of the swing axes of the diamond pen and the rotating arm. With this configuration, rotating the feed screw adjusts the protrusion distance of the diamond pen on the rotating arm, thus adjusting the relative position of the swing axes of the diamond pen and the rotating arm. This linearly controls the radius of curvature of the reciprocating oscillation of the diamond pen during the swing of the rotating arm. Since there is no obstruction on the extension line of the axis of the first through hole of the rotating arm, theoretically the feed screw can be extended indefinitely, allowing for a large adjustment range for the diamond pen's feed amount. However, due to the gap between the internal and external threads of the threaded screw, resulting in a backlash difference, and limitations in thread processing, the accuracy of controlling the relative position of the swing axes of the diamond pen and the rotating arm using the feed screw is low and there are gaps.

[0013] Preferably, the feeding mechanism includes a feeding cam and a feeding slide bar, with the feeding slide bar fixed in a fixed relative position to the diamond pen. Using the feeding cam to push the feeding slide bar controls the protrusion distance of the diamond pen on the rotating arm, improving the pen's motion accuracy. The pen's feed amount is determined by the cam's stroke curve and the rotation of the cam, achieving stepless adjustment of the relative position of the diamond pen and the rotating arm's swing axis. However, due to the cam's size and shape limitations, the stroke curve has curved segments, resulting in a small adjustment range for the diamond pen's feed amount, and some adjustment ranges cannot be linearly adjusted.

[0014] The purpose of this invention is to enable a wide range of adjustable feed rates for the diamond dressing tool, achieving extensive curvature radius adjustment and improving the adaptability of the grinding wheel dressing device; to monitor cutting force in real time and indirectly determine the wear state of the diamond dressing tool; to improve the feed accuracy of the diamond dressing tool; to achieve stepless adjustment of the relative position of the diamond dressing tool and the swing axis of the rotating arm; and to provide the following beneficial effects: linear control of the curvature radius of the reciprocating oscillation of the diamond dressing tool during the swing of the rotating arm, providing a large linear adjustment range for the feed rate of the diamond dressing tool; and to ensure that the cooling channel can swing along with the swing of the diamond dressing tool, effectively avoiding the phenomenon of untimely cooling of the coolant due to the reciprocating oscillation of the diamond dressing tool or the phenomenon of inertial cooling of non-machined areas. Attached Figure Description

[0015] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a large-scale spherical arc grinding wheel dressing device.

[0017] Figure 2 This is a cross-sectional view of Embodiment 1 of the present invention.

[0018] Figure 3 This is a partially enlarged view of the power unit according to Embodiment 1 of the present invention.

[0019] Figure 4 This is a cross-sectional view of the positioning device according to Embodiment 1 of the present invention.

[0020] Figure 5 This is a cross-sectional view of the positioning mechanism according to Embodiment 1 of the present invention.

[0021] Figure 6 This is a front view of the diamond pen according to Embodiment 1 of the present invention.

[0022] Figure 7 This is a cross-sectional view (AA) of the diamond pen part of the present invention.

[0023] Figure 8 This is a BB cross-sectional view of the diamond pen part of the present invention.

[0024] Figure 9 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0025] Figure 10 This is a cross-sectional view of the positioning device according to Embodiment 2 of the present invention.

[0026] Legend: 1 Power unit; 11 Servo motor; 12 Reducer; 13 Coupling; 2 Fixing plate; 3 Dresser bracket; 4 Positioning device; 41 Diamond pen; 42 Mounting hole; 43 Positioning mechanism; 43a Locking screw; 43b Nut sleeve; 44 Feed mechanism; 44a Feed screw; 44b Feed slide bar; 44c Feed cam; 44d Limit block; 44e Spring; 45 Clamping block mechanism; 45a First clamping block; 45b Second clamping block; 46 Pressure sensor; 47 Keyway structure; 48 Cylindrical pin; 49 Cooling channel; 5 Adjusting plate; 6 Rotary arm. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Example 1 Combination Figure 1 and Figure 2 As shown, a large-range spherical arc grinding wheel dressing device includes a diamond pen 41 and a rotating arm 6. The rotating arm 6 is arc-shaped, and a first through hole perpendicular to the extension direction of the rotating arm 6 is provided in the middle of the arc shape. The two ends of the arc shape of the rotating arm 6 are located on the same vertical line. The dressing device also includes a positioning device 4 for fixing the diamond pen 41 at one end. The first through hole accommodates one end of the positioning device 4 for fixing the positioning device 4. A feeding mechanism 44 is provided at the end of the positioning device 4 away from the diamond pen 41. The feeding mechanism 44 can adjust the relative position of the swing axis of the diamond pen 41 and the rotating arm 6. With the above configuration, the arc-shaped rotating arm 6 makes the axis of reciprocating oscillation of the diamond pen 41 located at the front end of the diamond pen 41, and the oscillation path of the diamond pen 41 is arc-shaped. The through hole in the middle of the rotating arm 6 can provide sufficient forward and backward movement distance for the feeding mechanism 44, thereby enabling a large-range adjustment of the radius of curvature of the oscillation path of the diamond pen 41 and realizing large-range spherical arc dressing.

[0029] The dressing device also includes an adjustment plate 5 located below the dresser support 3. The adjustment plate 5 is equipped with a slide rail and is slidably connected to the dresser support 3. Since grinding wheels with large curvature radii are heavy and difficult to move, the adjustment plate 5 allows the dresser support 3 to slide left and right, reducing the labor intensity of the operator. At the same time, since some grinding wheels are irregularly shaped, the curvature radius of the grinding wheel varies at different positions. It is necessary to adjust the axial position of the pen shaft for different positions of the grinding wheel to form a motion trajectory that adapts to the shape of the irregularly shaped grinding wheel. Adjusting the dresser support 3 at this time facilitates the processing of irregularly shaped grinding wheels.

[0030] The dressing device also includes symmetrical dresser supports 3 on both sides of the rotating arm 6. The extension direction of the dresser supports 3 is parallel to the extension direction of the rotating arm 6, and the ends of the dresser supports 3 are connected to the fixing plates 2. The dresser supports 3 avoid the axial direction of the positioning device 4, allowing the positioning device 4 to have a large free movement space in the axial direction, realizing a large range of curvature radius dressing. The dresser supports 3 are connected to the fixing plates 2, increasing the number of fixing points of the dresser supports 3 and adjusting the fixing points, so that the rotating arm 6 can swing back and forth in the internal space of the dresser supports 3, improving the stability of the dresser supports 3. The dresser supports 3 block and isolate both sides of the grinding wheel dressing process, isolating some of the sparks generated by the grinding wheel dressing and preventing other personnel from accidentally entering the grinding wheel dressing area.

[0031] like Figure 3As shown, the dressing device also includes a power unit 1. The rotating arm 6 passes through the fixed plate 2 and is connected to the power unit 1. The power unit 1 and the rotating arm 6 are located on the same plane, and the power unit 1 can drive the rotating arm 6 to reciprocate. The fact that the power unit 1 and the rotating arm 6 are on the same plane reduces the mass deviating from the axis of rotation of the dressing device, lowers the rotational inertia of the dressing device, and facilitates the rapid stopping and starting of the reciprocating oscillation of the dressing device. The power unit 1 includes a servo motor 11, a reducer 12, and a coupling 13. The servo motor 11 is connected to the rotating arm 6 through the reducer 12 and the coupling 13. The servo motor 11 performs reciprocating motion through encoding, controlling the high-frequency oscillation of the rotating arm 6 to dress the curved surface of the grinding wheel. In some embodiments, a circular grating ruler can also be arranged around the power unit 1, with the axis of the circular grating ruler collinear with the axis of oscillation of the rotating arm 6. The circular grating ruler collects the angular position signal of the rotating arm 6 and feeds it back to the controller of the power unit 1 to achieve closed-loop position detection. Furthermore, by adding a microcontroller to automatically respond to the swing angle position signal, and in conjunction with the encoder of the servo motor 11, the closed-loop motion control of the rotating arm 6 can be completed, enabling automated dressing of the grinding wheel.

[0032] Combination Figure 4 , Figure 6 and Figure 7 As shown, the positioning device 4 has a mounting hole 42 at one end of the diamond pen 41. The axis of the diamond pen 41 and the axis of the mounting hole 42 form an angle. A pressure sensor 46 is provided at the bottom of the mounting hole 42, and a clamping block mechanism 45 abuts against the pressure sensor 46 is also provided inside the mounting hole 42. The pressure sensor 46 at the bottom of the mounting hole 42 can detect the state and processing condition of the diamond pen 41. For example, after long-term processing or abnormal processing, the diamond pen 41 may become dull or chipped after wear. During the dressing process, the cutting force with the grinding wheel, whether it is friction or normal force, will change, especially the normal force will change significantly. The more severe the wear, the higher the average amplitude of the cutting force and the greater the fluctuation range. Due to the increased contact area of ​​the tip, the cutting efficiency decreases. Installing a strain gauge force sensor between the diamond pen 41 and the feed mechanism 44 can monitor the cutting force in real time and indirectly judge the wear state. Furthermore, when dressing the grinding wheel with the new diamond pen 41, the stable cutting force range is recorded to avoid interference from factors such as uneven grinding wheel hardness and feed rate fluctuations affecting the judgment of wear status. The stable cutting force range is used as a supplementary factor in the judgment. Because the diamond pen 41 is installed at an angle, its tip can smoothly cut the rotating grinding wheel, but this makes it difficult to fix the other end of the tip. A clamping block mechanism 45 is used to radially clamp and fix the tilted diamond pen 41. The clamping block mechanism 45 provides the diamond pen 41 with a flat fixed end face, reducing the difficulty of fixing the tilted diamond pen 41 and the detection difficulty of the strain gauge force sensor.

[0033] like Figure 5As shown, the positioning device 4 has a positioning mechanism 43 at one end where the diamond pen 41 is fixed. The positioning mechanism 43 is perpendicular to the first through hole and can lock the relative position of the diamond pen 41 and the swing axis of the rotating arm 6. The positioning mechanism 43 includes a locking screw 43a and a nut sleeve 43b that cooperates with the locking screw 43a. The relative position of the locking screw 43a and the rotating arm 6 is fixed, and the locking screw 43a and the nut sleeve 43b clamp and fix it to prevent the positioning device 4 from moving back and forth.

[0034] like Figure 4 As shown, the feed mechanism 44 includes a feed screw 44a. One end of the feed screw 44a, away from the diamond pen 41, is fixed in relative position to the rotating arm 6. The other end of the feed screw 44a can be threaded to drive the relative position of the swing axes of the diamond pen 41 and the rotating arm 6. With this configuration, rotating the feed screw 44a adjusts the protrusion distance of the diamond pen 41 on the rotating arm 6, thus adjusting the relative position of the swing axes of the diamond pen 41 and the rotating arm 6. This linearly controls the radius of curvature of the reciprocating oscillation of the diamond pen 41 during the swing of the rotating arm 6. Since there is no obstruction on the extension line of the axis of the first through hole of the rotating arm 6, theoretically, the feed screw 44a can be extended indefinitely, and the adjustment range of the feed amount of the diamond pen 41 is large. However, due to the gap between the internal and external threads of the threaded screw, resulting in a backlash difference, and limitations in thread processing, the accuracy of controlling the relative position of the swing axes of the diamond pen 41 and the rotating arm 6 using the feed screw 44a is low and there are gaps.

[0035] Combination Figure 6 , Figure 7 and Figure 8 As shown, the clamping mechanism 45 includes a first clamping block 45a and a second clamping block 45b that cooperate to clamp the diamond pen 41. The plane containing the axis of the diamond pen 41 and the axis of the mounting hole 42 separates the first clamping block 45a and the second clamping block 45b. The outer side of the first clamping block 45a is provided with a keyway structure 47 to fix it to the mounting hole 42, and the second clamping block 45b is provided with a cylindrical pin 48 to fix the diamond pen 41. With the above arrangement, the inner holes of the first clamping block 45a and the second clamping block 45b for clamping the diamond pen 41 are symmetrical, which is beneficial for processing and for maintaining the force balance when clamping the diamond pen 41. At the same time, the cylindrical pin 48 of the second clamping block 45b can also apply a balanced fixing force to the diamond pen 41. The keyway structure 47 of the first clamping block 45a fixes the relative position of the first clamping block 45a in the mounting hole 42, and the second clamping block 45b and the diamond pen 41 can also be locked in the mounting hole 42 when installed with the first clamping block 45a.

[0036] The inner wall of the mounting hole 42 and the clamping mechanism 45 form a cooling channel 49. The plane containing the axis of the cooling channel 49 and the axis of the diamond pen 41 intersects with the plane containing the axis of the mounting hole 42. The thickness of the clamping mechanism 45 is less than the depth of the mounting hole 42. The cooling channel 49, formed by the inner wall of the mounting hole 42 and the clamping mechanism 45, can swing with the swinging process of the diamond pen 41. That is, the cooling channel 49 is stationary relative to the diamond pen 41, which can effectively avoid the phenomenon of untimely cooling of coolant due to the reciprocating oscillation of the diamond pen 41 or the phenomenon of inertial cooling of non-processing positions. The thickness of the clamp is less than the depth of the mounting hole 42, so that after the coolant is sprayed out of the cooling channel 49, the mounting hole 42 restricts it on one side and the diamond pen 41 is on the other side. This can constrain and guide the spraying path of the coolant, prevent coolant splashing, and guide the coolant to spray towards the processing area for cooling.

[0037] Example 2 The difference from Embodiment 1 is that, combined with Figure 9 and Figure 10 As shown, in this embodiment, the feeding mechanism 44 includes a feeding cam 44c and a feeding slide bar 44b, with the feeding slide bar 44b fixed in a fixed position relative to the diamond pen 41. A limiting block 44d is provided below the feeding cam 44c to limit the rotation angle and direction of the cam. The feeding cam 44c rotates to push the portion of the diamond pen 41 fixed to the feeding slide bar 44b to feed. At the same time, a spring 44e for resetting is sleeved on the feeding slide bar 44b. One end of the spring 44e abuts against the compression positioning device 4, and the other end abuts against the rotating arm 6. After reaching the specified feed amount, the locking screw 43a is rotated by the positioning mechanism 43 to position the device. The locking screw 43a and the knob of the feeding cam 44c are located on the same side for easy adjustment and positioning. After the positioning mechanism 43 is released, the spring 44e pulls the portion of the diamond pen 41 and the feeding cam 44c to reset. By using a feed cam 44c to push a feed slide bar 44b to control the protrusion distance of the pen 41 on the rotating arm 6, the motion accuracy of the pen 41 can be improved. The feed amount of the pen 41 is determined by the stroke curve of the cam and the rotation of the cam, realizing stepless adjustment of the relative position of the pen 41 and the swing axis of the rotating arm 6. However, due to the size and shape limitations of the cam, the stroke curve has curved segments, the adjustment range of the feed amount of the pen 41 is small, and some adjustment ranges cannot be linearly adjusted.

[0038] The purpose of this invention is to allow for a wide range of adjustment of the feed rate of the diamond dressing tool 41, enabling a wide range of curvature radius dressing and improving the adaptability of the grinding wheel dressing device; to monitor the cutting force in real time and indirectly determine the wear state of the diamond dressing tool 41; to improve the feed accuracy of the diamond dressing tool 41; to achieve stepless adjustment of the relative position of the diamond dressing tool 41 and the swing axis of the rotating arm 6; and to provide a large linear adjustment range for the feed rate of the diamond dressing tool 41 by linearly controlling the curvature radius of the reciprocating oscillation of the diamond dressing tool 41 during the swing of the rotating arm 6; and to ensure that the cooling channel 49 can swing along with the swing process of the diamond dressing tool 41, effectively avoiding the phenomenon of untimely cooling of the coolant due to the reciprocating oscillation of the diamond dressing tool 41 or the phenomenon of inertial cooling of non-machined positions.

[0039] The above embodiments and / or implementation methods are merely illustrative of preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any way. Any person skilled in the art may make some modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but these should still be regarded as the technology or embodiments that are substantially the same as the present invention.

Claims

1. A large-range spherical arc grinding wheel dressing device, comprising a diamond pen (41) and a rotating arm (6), characterized in that, The rotating arm (6) is bow-shaped. The middle part of the bow shape of the rotating arm (6) is provided with a first through hole perpendicular to the extension direction of the rotating arm (6). The two ends of the bow shape of the rotating arm (6) are located on the same vertical line. The trimming device also includes a positioning device (4) that fixes the diamond pen (41) at one end. The first through hole accommodates and fixes the end of the positioning device (4) with the diamond pen (41). The end of the positioning device (4) away from the diamond pen (41) is provided with a feeding mechanism (44). The feeding mechanism (44) can adjust the relative position of the swing axis of the diamond pen (41) and the rotating arm (6).

2. The large-range spherical arc grinding wheel dressing device according to claim 1, characterized in that, The positioning device (4) has a diamond pen (41) with a mounting hole (42) at one end. The axis of the diamond pen (41) and the axis of the mounting hole (42) are at an angle. A pressure sensor (46) is provided at the bottom of the mounting hole (42). A clamping block mechanism (45) that abuts against the pressure sensor (46) is also provided inside the mounting hole (42).

3. The large-range spherical arc grinding wheel dressing device according to claim 2, characterized in that, The clamping mechanism (45) includes a first clamping block (45a) and a second clamping block (45b) that cooperate to clamp the diamond pen (41). The plane containing the axis of the diamond pen (41) and the axis of the mounting hole (42) separates the first clamping block (45a) and the second clamping block (45b). The outer side of the first clamping block (45a) is provided with a keyway structure (47) and fixed to the mounting hole (42). The second clamping block (45b) is provided with a cylindrical pin (48) to fix the diamond pen (41).

4. The large-range spherical arc grinding wheel dressing device according to claim 2, characterized in that, The inner wall of the mounting hole (42) and the clamping mechanism (45) form a cooling channel (49). The cooling channel (49) intersects the plane where the axis of the diamond pen (41) and the axis of the mounting hole (42) are located. The thickness of the clamping mechanism (45) is less than the depth of the mounting hole (42).

5. The large-range spherical arc grinding wheel dressing device according to claim 1, characterized in that, The trimming device also includes trimmer brackets (3) symmetrically arranged on both sides of the rotating arm (6). The extension direction of the trimmer brackets (3) is parallel to the extension direction of the rotating arm (6). The ends of the trimmer brackets (3) are provided with fixing plates (2) connected to each other.

6. The large-range spherical arc grinding wheel dressing device according to claim 5, characterized in that, The trimming device also includes a power device (1), the rotating arm (6) passes through the fixed plate (2) and is connected to the power device (1). The power device (1) and the rotating arm (6) are located on the same plane. The power device (1) can drive the rotating arm (6) to oscillate back and forth.

7. A large-range spherical arc grinding wheel dressing device according to claim 6, characterized in that, The power unit (1) includes a servo motor (11), a reducer (12) and a coupling (13), and the servo motor (11) is connected to the rotating arm (6) through the reducer (12) and the coupling (13).

8. The large-range spherical arc grinding wheel dressing device according to claim 1, characterized in that, The positioning device (4) has a positioning mechanism (43) at one end of the fixed diamond pen (41). The positioning mechanism (43) is perpendicular to the first through hole. The positioning mechanism (43) can lock the relative position of the diamond pen (41) and the rotating arm (6) in a vertical line.

9. A large-range spherical arc grinding wheel dressing device according to claim 8, characterized in that, The feeding mechanism (44) includes a feeding screw (44a), one end of which is away from the diamond pen (41) and is fixed in relative position to the rotating arm (6), and the other end of the feeding screw (44a) can drive the relative position of the diamond pen (41) and the rotating arm (6) in a vertical line by means of a thread.

10. A large-range spherical arc grinding wheel dressing device according to claim 8, characterized in that, The feeding mechanism (44) includes a feeding cam (44c) and a feeding slide (44b), the feeding slide (44b) being fixed in a fixed position relative to the diamond pen (41).

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