Single-disc-wheel numerical control dresser and dressing method

Abstract

The invention discloses a single-disc-wheel numerical control dresser and a dressing method. The single-disc-wheel numerical control dresser comprises a base, a rotary base is installed on one side of the base, a dragging plate capable of sliding horizontally is installed on the base, a dressing motor is installed on the dragging plate, and a diamond disc wheel is installed at the output end of the dressing motor. A rigid base is adopted for supporting, only a planker longitudinally feeds a servo shaft, accurate adjustment of the angle of a diamond roller can be conveniently achieved through an angle adjusting mechanism of a base, and accurate shape correction of a grinding wheel is achieved by means of transverse feeding movement (full-closed-loop control) of a cross-shaped workbench of a machine tool and two-shaft linkage interpolation. Compared with a traditional numerical control dresser, the diamond disc wheel adopts frequency conversion speed regulation, is convenient and rapid, has few manufacturing and assembling parts, is easy to compensate assembling errors, and has the advantages of low manufacturing cost, high shaping precision, strong structural rigidity, high dynamic response performance and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of metal cutting, and in particular to a single-disc wheel CNC dresser and a dressing method. Background Art

[0002] In order to meet the processing needs of large-size lead screw nut internal thread grinding machine, the machine tool adopts a fixed worktable and movable grinding wheel frame method. Compared with the traditional T-shaped structure and movable worktable machine tool, the transmission method of this machine tool has changed. The size of the parts to be processed by the machine tool is large, which requires the use of a virtual rotation center design for the adjustment of the grinding wheel helix angle. Therefore, the traditional grinding wheel dresser cannot meet the grinding wheel shaping requirements of the new structure machine tool. A single-disc wheel CNC dresser is developed to meet the requirements of good structural rigidity, high shaping accuracy and low manufacturing cost. Summary of the Invention

[0003] In view of the above-mentioned defects or shortcomings, the object of the present invention is to provide a single-disc wheel CNC dresser and a dressing method.

[0004] In order to achieve the above objects, the technical solution of the present invention is: A single disc wheel CNC dresser comprises: a base, a rotating base is installed on one side of the base, a horizontally slidable carriage is installed on the base, a dressing motor is installed on the carriage, and a diamond disc wheel is installed at the output end of the dressing motor.

[0005] An angle adjustment mechanism and a rotation mechanism for adjusting the rotation angle are installed on the base.

[0006] The angle adjustment mechanism includes: a first screw nut pair installed on the top of the base, a card slot is installed on the base, the nut pin on the first screw nut pair cooperates with the base card slot, the first screw nut pair moves up and down, driving the base to rotate around the rotating axis to complete the angle adjustment.

[0007] The left end of the base is an arc-shaped structure, and an angle indicating scale is provided on the arc-shaped structure.

[0008] The rotation mechanism includes: a rotating shaft installed at the end of the base, a first locking nut for locking the rotating shaft and the base is installed on the rotating shaft, and a pressure plate for positioning the base is installed at the left end of the base; when the base is rotated to the required angle, the pressure plate is tightened by a screw, and the first locking nut is tightened at the same time to rigidly connect the base and the base; a rotation mechanism for adjusting the rotation of the base is provided on the base.

[0009] A linear guide rail is installed on the base, and a guide rail slider that matches the linear guide rail is installed on the carriage; a second screw nut pair is installed on the bottom of the carriage, and the second screw nut pair is connected to the servo motor through a coupling, and the movement of the servo motor drives the carriage to move horizontally.

[0010] A spindle body shell is installed on the carriage, the dressing motor is installed at one end of the spindle body shell, the output end of the dressing motor includes: a dressing spindle, pre-tightened precision bearings are installed on both sides of the dressing spindle, and the diamond disc wheel is fixed on the other end of the dressing spindle.

[0011] The center plane of the diamond disc wheel and the rotation center of the base are in the same plane.

[0012] The diamond disc wheel is fixed to one end of the dressing spindle through a second locking nut.

[0013] A dressing method based on the above-mentioned single-disc wheel CNC dresser comprises: 1) Adjust the base by rotating it so that it rotates around the center of the axis in a vertical plane. After the required angle is reached, fix it. 2) With the help of the cross table lateral feed motion mechanism, adjust the base lateral feed and the longitudinal feed of the carriage at the same time, so that the diamond disc wheel contacts the grinding wheel to be dressed; 3) Start the high-speed rotation of the diamond disc wheel to achieve precise shaping of the grinding wheel.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a single-disc wheel CNC dresser and dressing method. This device utilizes a rigid base and features only one servo axis for longitudinal feed of the carriage. The base's angle adjustment mechanism facilitates precise adjustment of the diamond roller's angle. Utilizing the machine tool's cross-table's lateral feed motion (fully closed-loop control), two-axis interpolation achieves precise grinding wheel shaping. Compared to conventional CNC dressers, the diamond wheel of this invention utilizes variable frequency speed regulation, making it convenient and fast. Furthermore, it requires fewer manufacturing and assembly parts, making assembly errors easily compensated. The device offers advantages such as low manufacturing cost, high shaping accuracy, strong structural rigidity, and superior dynamic response. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a single-disc wheel CNC dresser according to the present invention; Figure 2 This is a top view of the single-disc wheel CNC dresser of the present invention; Figure 3 This is a left side view of the single-disc wheel CNC dresser of the present invention; Figure 4 This is a rear view of the single-disc wheel CNC dresser of the present invention; Figure 5 This is a cross-sectional view of the angle adjustment mechanism of the single-disc wheel CNC dresser of the present invention; Figure 6 It is a cross-sectional view of the rotary axis of the single-disc wheel CNC dresser of the present invention.

[0016] In the figure, 1 is the base; 2 is the spindle housing; 3 is the drag plate; 4 is the dressing motor; 5 is the coupling; 6 is the servo motor; 7 is the pressure plate; 8 is the base; 9 is the rotating shaft; 10 is the first locking nut; 11 is the second locking nut; 12 is the linear guide; 13 is the diamond disc wheel; 14 is the angle indicating scale; 15 is the first screw nut pair; 16 is the slot; 17 is the second screw nut pair; 18 is the nut pin; 31 is the guide rail slider; 41 is the dressing spindle; 42 is the preloaded precision bearing. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described herein are only some embodiments of the present invention, not all embodiments. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0018] like Figure 1-4 As shown, the present invention provides a single-disc wheel CNC dresser, comprising: a base 1, a rotating base 8 is installed on one side of the base 1, a horizontally slidable drag plate 3 is installed on the base 8, a dressing motor 4 is installed on the drag plate 3, and a diamond disc wheel 13 is installed at the output end of the dressing motor 4.

[0019] Preferably, in the present invention, the base 1 is equipped with an angle adjustment mechanism and a rotation mechanism for adjusting the rotation angle. The base 1 is fixed to the upper carriage side of the machine tool cross table by screws. The base 8 is connected to the base 1 by a rotating shaft 9, which is parallel to the machine tool table. The base 8 rotates around the center of the rotating shaft 9 in a vertical plane.

[0020] Specifically, such as Figure 5 As shown, the angle adjustment mechanism includes: a first screw-nut pair 15 installed on the top of the base 1, a slot 16 installed on the base 8, a nut pin 18 of the first screw-nut pair 15 cooperates with the slot 16 on the base 8, and the nut pin 18 cooperates with the slot 16 of the base 8. The screw drives the nut pin 18 to move up and down, driving the base 8 to rotate around the rotating shaft 9 to achieve angle adjustment. The first screw-nut pair 15 is vertically installed on the left side of the base 1 away from the center of the rotating shaft 9. The nut pin 18 slides in the slot 16 of the base 8. The screw drives the nut up and down, driving the base 8 to rotate around the center of the rotating shaft 9. After reaching the desired angle, the connecting screws of the pressure plate 7 and the base 8 are tightened to fix the adjusted angle of the base 8. At the same time, the first locking nut 10 at the end of the rotating shaft 9 is tightened to rigidly connect the base 8 to the base 1.

[0021] like Figure 6 As shown, the rotating mechanism includes: a rotating shaft 9 installed at the end of the base 8, and a first locking nut 10 for locking the rotating shaft and the base 8 is installed on the rotating shaft 9; Figure 4As shown, a pressure plate 7 for positioning the base 8 is installed at the left end of the base 8; when the base 8 is rotated to the desired angle, the pressure plate 7 is fastened by screws, and the first locking nut 10 is tightened at the same time to make the base 8 rigidly connected to the base 1, thereby achieving the purpose of fixing the base 8; when the base 8 is rotated to the preset required angle, the pressure plate 7 is fixedly installed on the left end of the base 1. Preferably, a rotating mechanism for adjusting the rotation of the base 8 is provided on the base 1.

[0022] In order to obtain the rotation angle more accurately, in the present invention, the left end of the base 1 is an arc-shaped structure, and an angle indicating scale 14 is provided on the arc-shaped structure. The middle of the pressure plate 7 is a hollow structure to facilitate reading the angle.

[0023] In addition, a linear guide rail 12 is installed on the base 8 of the present invention, and a guide rail slider 31 that cooperates with the linear guide rail 12 is installed on the carriage 3; a second screw nut pair 17 is installed at the bottom of the carriage 3, and the second screw nut pair 17 is connected to the servo motor 6 through the coupling 5, and the movement of the servo motor 6 drives the carriage 3 to move horizontally.

[0024] The spindle housing 2 is mounted on the carriage 3, and the dressing motor 4 is mounted at one end of the spindle housing 2. The output end of the dressing motor 4 includes a dressing spindle 41, supported by preloaded precision bearings 42 on either side. The center plane of the diamond disc 13 is aligned with the rotation center of the base 8 and the center of the rotating shaft 9. The diamond disc 13 is secured to one end of the dressing spindle 41 via a second locking nut 11. The diamond roller spindle housing 2 is secured to the carriage 3 via screws. The system controls the dressing motor 4 using variable frequency speed regulation, driving the diamond disc 13 to rotate at high speed to achieve grinding wheel dressing.

[0025] It should be noted that the base 1 of the present invention is fixed by screws on the side surface of the support plate of the cross workbench, which serves as the support base of the dresser and has high rigidity. The base 8 is connected to the base 1 through the rotating shaft 9. A pair of precision linear guide rails are installed on the upper and lower parts of the base 8, and the carriage 3 is fixedly connected to the guide rail slider 31. The servo motor 6 fixed on the left side of the base 8 drives the carriage 3 to move longitudinally through the coupling 5 and the second screw nut pair 17. The angle adjustment mechanism is fixed on the top of the base 1, and the nut pin 18 is driven by the first screw nut pair 15 to drive the base 8 to rotate around the center of the rotating shaft 9, so that the center of the dressing spindle 41 is adjusted to the required angle; after adjustment, the base 1 is fixedly connected to the base 8 through the pressure plate 7. The longitudinal feed movement of the dresser is controlled by the CNC system, and the lateral feed movement of the carriage on the cross workbench of the machine tool is interpolated to achieve precise dressing of the grinding wheel.

[0026] The longitudinal motion mechanism of the carriage 3 is driven by the servo motor 6 through the coupling 5 to drive the second screw nut pair 17, and the nut is fastened to the nut seat at the bottom of the carriage 3; the servo motor 6 is installed on the left side of the base 8, and the linear guide 12 is installed on the upper and lower sides of the base 8. The linear guide 12 cooperates with the guide rail slider 31, and the carriage 3 is fixed to the guide rail slider 31 by screws; the CNC system controls the servo motor 6 according to the shaping algorithm, drives the carriage 3 to move along the linear guide 12 at the required speed, realizes the longitudinal feed of the diamond disc wheel 13, and has high motion accuracy and dynamic response performance.

[0027] In addition, the present invention also provides a dressing method for a single-disc wheel CNC dresser, comprising: 1) Adjust the base 8 by rotating it so that it rotates around the center of the rotation axis in a vertical plane. After the desired angle is reached, fix it; 2) With the help of the cross table lateral feed motion mechanism, adjust the lateral feed of the base 1 and the longitudinal feed of the carriage 3 so that the diamond disc wheel 13 contacts the grinding wheel to be dressed; 3) Start the high-speed rotation of the diamond disc wheel 13 to achieve precise shaping of the grinding wheel.

[0028] It is obvious to those skilled in the art that the above-mentioned specific examples are only preferred embodiments of the present invention. Therefore, any improvements and changes that may be made by those skilled in the art to certain parts of the present invention still reflect the principles of the present invention and achieve the purpose of the present invention, and all fall within the scope of protection of the present invention.

Claims

1. A single disc wheel CNC dresser, characterized in that: include: A base (1) is provided, wherein a rotating base (8) is installed on one side of the base (1), a horizontally slidable carriage (3) is installed on the base (8), a trimming motor (4) is installed on the carriage (3), and a diamond disc wheel (13) is installed at the output end of the trimming motor (4).

2. The single-disc wheel CNC dresser according to claim 1, characterized in that: An angle adjustment mechanism and a rotation mechanism for adjusting the rotation angle are installed on the base (1).

3. The single-disc wheel CNC dresser according to claim 2, characterized in that: The angle adjustment mechanism comprises: a first screw nut pair (15) mounted on the top of the base (1); a slot (16) is mounted on the base (8); a pin on the first screw nut pair (15) cooperates with the slot (16) of the base (8); the first screw nut pair (15) drives the nut pin (18) to move up and down, driving the base (8) to rotate around the rotation axis, thereby completing the angle adjustment.

4. The single-disc wheel CNC dresser according to claim 3, characterized in that: The left end of the base (1) is an arc-shaped structure, and an angle indicating scale (14) is provided on the arc-shaped structure.

5. The single-disc wheel CNC dresser according to claim 3, characterized in that: The rotating mechanism comprises: a rotating shaft (9) mounted at the end of the base (8); a first locking nut (10) for locking the rotating shaft and the base (8) is mounted on the rotating shaft (9); a pressing plate (7) for positioning the base (8) is mounted at the left end of the base (8); when the base (8) is rotated to a desired angle, the pressing plate (7) is tightened by screws and the first locking nut (10) is tightened at the same time, so that the base (8) is rigidly connected to the base (1).

6. The single-disc wheel CNC dresser according to claim 1 or 3, characterized in that: A linear guide rail (12) is installed on the base (8), and a guide rail slider (31) that matches the linear guide rail (12) is installed on the carriage (3); a second screw nut pair (17) is installed at the bottom of the carriage (3), and the second screw nut pair (17) is connected to the servo motor (6) through a coupling (5). The servo motor (6) drives the second screw nut pair (17) to drive the carriage (3) to feed horizontally and longitudinally.

7. The single-disc wheel CNC dresser according to claim 1, characterized in that: A spindle housing (2) is mounted on the carriage (3), the dressing motor (4) is mounted on one end of the spindle housing (2), the output end of the dressing motor (4) comprises a dressing spindle (41), preloaded precision bearings (42) are mounted on both sides of the dressing spindle (41), and the diamond disc wheel (13) is fixed on the other end of the dressing spindle (41).

8. The single-disc wheel CNC dresser according to claim 1 or 7, characterized in that: The center plane of the diamond disc wheel (13) and the rotation center of the base (8) are in the same plane.

9. The single-disc wheel CNC dresser according to claim 1 or 7, characterized in that: The diamond disc wheel (13) is fixed to one end of the trimming spindle (41) via a second locking nut (11).

10. A dressing method based on the single-disc wheel CNC dresser according to claim 1, characterized in that: include: 1) By rotating the base (8), adjusting the base (8) so that the base (8) rotates around the center of the rotation axis in a vertical plane, and fixing it after adjusting to a desired angle; 2) By means of the cross table transverse feed motion mechanism, adjust the transverse feed of the base (1) and simultaneously adjust the horizontal longitudinal feed of the carriage (3) so that the diamond disc wheel (13) contacts the grinding wheel to be trimmed; 3) Start the diamond disc wheel (13) to rotate and complete the precise shaping of the grinding wheel.

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