Powerful non-magnetic ball base surface grinding machine dresser and driving disc dressing method

Abstract

The invention relates to the technical field of grinding machine dressing, and discloses a powerful non-magnetic ball base surface grinding machine dresser and a driving disc dressing method.The powerful non-magnetic ball base surface grinding machine dresser comprises a bottom plate fixed to the opposite sides of a grinding wheel assembly, the bottom plate is located between two oppositely-arranged driving discs, and the grinding wheel assembly, the driving discs and the bottom plate are distributed in a cross shape; a dovetail sliding rail is installed on the oil cylinder fixing plate, a sliding plate is slidably connected to the dovetail sliding rail, a driving oil cylinder is installed on one side of the oil cylinder fixing plate, the output end of the driving oil cylinder is fixedly connected with the sliding plate, and a diamond pen is installed on the top of the sliding plate through a feeding sleeve; by means of the adjusting characteristic of the sine bar principle at the angle below 30 degrees, on the basis that the machining requirement of the roller taper is met, the defects that an original machine tool is large in drive disc grinding error and long in model changing time are overcome to a great extent, the product machining precision is improved, and vibration of a grinding wheel spindle is eliminated. And the structure is simple, use is stable, cost is low, and maintenance is easy.

Description

Technical Field

[0001] This invention relates to the field of grinding machine dressing technology, specifically a powerful non-magnetic ball-based grinding machine dresser and a driving disc dressing method. Background Technology

[0002] Among conical roller spherical surface grinding machines, the non-magnetic high-strength forming spherical surface grinding machine is the most advanced and accurate. However, due to significant differences between the original design concept and actual operation, this machine lacks a wheel dresser. The two drive discs are the driving components that effectively move the workpiece, and their accuracy is crucial. The lack of a wheel dresser and the use of adjusting the grinding head at a certain angle to grind the drive discs presents many drawbacks, necessitating an improvement in the wheel dressing method.

[0003] The original machine tool used a method of moving the entire grinding head assembly to the left at a suitable angle to grind the drive disc A (e.g.) Figure 6 (Left), after completion, turn the drive plate B in the opposite direction at the same angle (e.g.) Figure 6 (Right), then return to zero position after completion. The original machine tool did not have the following drawbacks due to the lack of a grinding wheel dresser: The angle error is large, making it difficult to achieve the required angle value. Most of the time, the accuracy of the angle needs to be verified by grinding the rollers. This often requires repeated trials to achieve the required value, which is time-consuming, labor-intensive, and inefficient. Since the two drive discs are ground separately, there is a high risk of angle difference between them, which can lead to grinding failure and require re-grinding. If the angle difference is accepted, the accuracy of the grinding roller cannot be guaranteed. If the grinding head component deviates from its zero position, it is extremely difficult to fully restore it to its original zero position after repeated attempts to rotate it away from it. Only when the grinding head is in its zero position can the centerline of the grinding head be guaranteed to be perpendicular to the centerlines of the two drive discs, which is the benchmark for achieving precise machining. Once the zero position deviates, machining accuracy is difficult to guarantee. The balance of the grinding wheel cannot be guaranteed. Since there is no dresser, the grinding wheel is dressed outside the machine tool and then installed on the machine tool. Installation errors, flange fit errors, etc. will cause the grinding wheel to be unbalanced, resulting in large vibrations when rotating, and there is even a risk of the grinding wheel bursting. Summary of the Invention

[0004] The purpose of this invention is to provide a high-power, non-magnetic ball-based surface grinder dresser and a method for dressing the drive disc. Utilizing the principle of a sine bar, this invention is applied to a non-magnetic, high-power forming ball-based surface grinder, significantly solving the problems of large errors in the original machine tool's grinding drive disc and long changeover times. It improves the accuracy of the processed products and eliminates grinding wheel spindle vibration. Furthermore, its simple structure allows for stable use, thus addressing the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A powerful non-magnetic ball-based surface grinding machine dresser includes a base plate fixed on opposite sides of a grinding wheel assembly, and the base plate is located between two oppositely arranged drive discs. The grinding wheel assembly, drive discs, and base plate are arranged in a cross shape. The top surface of the base plate is rotatably connected to a cylinder fixing plate via a rotary shaft. A dovetail slide rail is fixedly connected to the top of the cylinder fixing plate. A slide plate is slidably connected to the dovetail slide rail. A drive cylinder is installed on one side of the cylinder fixing plate. The output end of the drive cylinder is fixedly connected to the slide plate. A diamond pen is installed on the top of the slide plate via a feed sleeve. Two rotating adjusting screws are provided on one side of the base plate to drive the cylinder fixing plate to tilt. A margin groove is opened on the side of the base plate. A standard cylinder is fixedly connected to the bottom of the cylinder fixing plate. The center of the standard cylinder and the rotating shaft are located on the same horizontal line. A gauge block group is detachably connected within the distance between the standard cylinder and the margin groove.

[0006] As a further embodiment of the present invention: an arc-shaped groove is provided on the bottom surface of the base plate, a locking screw is inserted into the arc-shaped groove, the locking screw is fixedly connected to the cylinder fixing plate, and a gasket is provided between the locking screw and the arc-shaped groove.

[0007] As a further embodiment of the present invention: a threaded hole is provided on the side of the base plate, the threaded hole is connected to the arc-shaped groove, the end of the rotating adjusting screw is located in the arc-shaped groove, and the end of the rotating adjusting screw is in contact with the locking screw.

[0008] As a further aspect of the present invention: the base plate has a plurality of positioning holes for fixing on the side away from the cylinder fixing plate.

[0009] A method for dressing the drive disc of a high-power non-magnetic ball-based surface grinder includes: S1: The height between the standard cylinder and the allowance groove is set to H1, the angle is zero, and the center distance between the rotary shaft and the standard cylinder is L. According to the sine principle, the height H of the gauge block group to be placed is calculated as follows: H=H1-L*sinα, where α is the roller half angle. S2: Place the gauge block set with the required height H between the standard cylinder and the allowance groove. Rotate the two rotary adjustment screws in opposite directions to drive the cylinder fixing plate to rotate through the rotary shaft. The locking screw slides in the arc groove. After the standard cylinder and gauge block set are locked in position, rotate the locking screw to press the shim and the base plate together. The base plate and cylinder fixing plate are fixed in position for the second time. Turn the feed knob of the feed sleeve to align the diamond pen with the grinding wheel to be dressed. Start the drive cylinder. The slide plate slides left and right on the dovetail slide rail under the drive of the piston rod of the drive cylinder. The diamond pen moves back and forth across the full width of the grinding wheel to dress it. The angle of the dressed grinding wheel is α. S3: Control drive disks A and B to approach the dressing wheel, allowing simultaneous grinding of drive disks A and B.

[0010] As a further embodiment of the present invention: S4: Add a set of gauge blocks equal to H1, and when the angle is set to zero, use a diamond pen to dress and grind the grinding wheel of the roller to be processed.

[0011] As a further improvement of the present invention: the HM518445 roller processed by the drive disc dressing method of a high-power non-magnetic ball surface grinder has an angular accuracy converted to linearity of 0.001mm, the drive disc runout after grinding is <0.003MM, the machine setup time is shortened from an average of 14 hours to 5 hours, the ball surface roughness Ra is increased from 0.25 to 0.1, and the curvature radius dispersion is reduced from 15mm to 5mm.

[0012] Compared with the prior art, the beneficial effects of the present invention are: The newly designed and manufactured dresser, applied to a non-magnetic high-strength forming spherical surface grinder, utilizes the adjustment characteristics of a sine bar at angles below 30°. While meeting the machining requirements of roller tapers, it significantly solves the drawbacks of the original machine tool, such as large errors in the grinding drive disc and long changeover times. This improves the accuracy of the machined products and eliminates grinding wheel spindle vibration. Furthermore, it has a simple structure, stable operation, low cost, and easy maintenance. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram showing the installation orientation of a powerful non-magnetic ball-based surface grinding machine dresser; Figure 2 A top view schematic diagram of a powerful non-magnetic ball-based surface grinding machine dresser; Figure 3 A bottom view schematic diagram of a powerful non-magnetic ball-based grinding machine dresser; Figure 4 This is a schematic diagram illustrating the machining process of a drive disk by a powerful non-magnetic ball-based surface grinding machine dresser. Figure 5 This is a schematic diagram illustrating the principle of the trimmer; Figure 6 This is a schematic diagram of the drive disk machining process in a current high-power non-magnetic ball surface grinder; In the diagram: 1. Base plate; 11. Gauge groove; 12. Threaded hole; 13. Arc groove; 14. Locking screw; 15. Washer; 2. Drive cylinder; 3. Cylinder fixing plate; 31. Dovetail slide rail; 32. Standard cylinder; 33. Rotary shaft; 4. Slide plate; 5. Feed sleeve; 6. Diamond pen; 7. Gauge block group; 8. Rotary adjustment screw. Detailed Implementation

[0015] Please see Figures 1-5 In this embodiment, a base plate 1 is fixed to the opposite side of the grinding wheel assembly, and the base plate 1 is located between two oppositely arranged drive discs. The grinding wheel assembly, drive discs, and base plate 1 are arranged in a cross shape. A cylinder fixing plate 3 is rotatably connected to the top surface of the base plate 1 via a rotary shaft 33. A dovetail slide rail 31 is fixedly connected to the top of the cylinder fixing plate 3, and a slide plate 4 is slidably connected to the dovetail slide rail 31. A drive cylinder 2 is installed on one side of the cylinder fixing plate 3, and the output end of the drive cylinder 2 is fixedly connected to the slide plate 4. A diamond pen 6 is installed on the top of the slide plate 4 via a feed sleeve 5. Two inclined rotary adjustment screws 8 of the drive cylinder fixing plate 3 are provided on one side of the base plate 1. The side of the base plate 1 is open. The system includes a gauge groove 11, a standard cylinder 32 fixedly connected to the bottom of the cylinder fixing plate 3, the center of the standard cylinder 32 and the center of the rotary shaft 33 being on the same horizontal line, a gauge block group 7 being detachably connected within the distance between the standard cylinder 32 and the gauge groove 11, an arc groove 13 being opened on the bottom surface of the base plate 1, a locking screw 14 being inserted into the arc groove 13, the locking screw 14 being fixedly connected to the cylinder fixing plate 3, a washer 15 being provided between the locking screw 14 and the arc groove 13, a threaded hole 12 being opened on the side of the base plate 1, the threaded hole 12 being connected to the arc groove 13, the end of the rotating adjusting screw 8 being located in the arc groove 13, and the end of the rotating adjusting screw 8 being in contact with the locking screw 14.

[0016] Design principles: Using the principle of sine bars, such as Figure 5 By inserting a set of gauge blocks of appropriate height H, the required angle α can be obtained.

[0017] A sine bar is a precision measuring tool that uses trigonometric methods to measure angles. It is generally used to measure parts with tapers or angles. Because its measurement results are calculated using the sine relationship of a right triangle, it is called a sine bar. During operation, the axes of the two cylinders are strictly balanced with and tangent to the main body.

[0018] according to Figure 5 The formula can be obtained as: sinα = H / L, where H is the dimension of gauge block group 7, calculated based on the nominal angle of the measured angle. The error of the measured angle can be obtained from the difference between the readings of the micrometer at both ends. Sine gauges are generally used to measure angles less than 45°, and the accuracy can reach 3″ to 5″ when measuring angles less than 30°.

[0019] Design advantages: When the diamond pen 6 is used to dress the workpiece and comes into contact with the grinding wheel, it needs to maintain stability. If the diamond pen 6 deviates under force, it will cause errors. To ensure stability, a simple limiting structure is required. However, too many moving parts can easily lead to instability and are also difficult to maintain.

[0020] The base plate 1 is the main body, and it is fixed to the support on the grinding machine corresponding to the grinding wheel through the fixing holes on the side. A hollow adjustment point is set below the hydraulic cylinder fixing plate 3 corresponding to the base plate 1. This support can be the original support of the grinding machine or an extended support. The hydraulic cylinder fixing plate 3 is the main moving part for adjusting the angle of the diamond pen 6 with a sine gauge. At the same time, the hydraulic cylinder fixing plate 3 supports the displacement of the slide plate 4 through the dovetail slide rail 31. The slide plate 4 provides the adjustment displacement stroke for the diamond pen 6, and the drive cylinder 2 provides the running power for the slide plate 4.

[0021] The cylinder fixing plate 3 is rotatably connected to the base plate 1 via a rotary shaft 33. The base plate 1 has two arc-shaped grooves 13. The locking screw 14 passes through the arc-shaped grooves 13 and is fixedly connected to the cylinder fixing plate 3. Similarly, the locking screw 14 slides along the trajectory of the arc-shaped grooves 13 within the arc-shaped grooves 13. At this time, the cylinder fixing plate 3 has a rotation range centered on the rotary shaft 33.

[0022] Using the principle of sine bars, the rotary shaft 33 is located at the center line of the cylinder fixing plate 3, and the center line of the rotary shaft 33 is horizontal and collinear with the center line of the standard cylinder 32. In the initial stage, there is an original height H between the standard cylinder 32 and the side wall of the allowance groove 11. The gauge block group 7 with a selected length of H contacts the standard cylinder 32, and the zero point can be confirmed by driving the standard cylinder 32 to be in close contact with the gauge block group 7.

[0023] The rotary adjusting screw 8 serves as an adjusting component. Rotating within the threaded hole 12, the end of the screw 8 extends into the arc-shaped groove 13 and contacts the locking screw 14. It achieves angle changes in the cylinder fixing plate 3 by moving left forward and right backward or right forward and left backward, while simultaneously limiting the cylinder fixing plate 3 and ensuring that the standard cylinder 32 contacts and locks with the gauge block group 7. Therefore, different gauge block groups 7 can be designed for different rollers, and the corresponding gauge block group 7 can be replaced each time it is used. Manufacturing high-precision gauge block groups 7 in the factory is very simple, allowing this technical solution to achieve accurate angle changes without high-precision equipment, while also being low-cost and highly scalable.

[0024] To further improve the stability of the locking mechanism, a shim 15 is provided. After the locking screw 14 is tightened, pressure is increased on the shim 15. At this time, the cylinder fixing plate 3 and the base plate 1 generate greater sliding friction. The sliding friction, the top pressure of the rotating adjusting screw 8, and the pressure of the standard cylinder 32 and the gauge block group 7 form a triple resistance, which determines the angular stability of the diamond pen 6. During machining, the feed sleeve 5 is driven to move the diamond pen 6 axially along the feed sleeve 5. The feed sleeve 5 is existing technology. Its principle is to use the propulsion action of threads, gears, racks, or hydraulic, pneumatic, or oil pressure to drive the diamond pen 6 to achieve axial displacement, which will not be elaborated here.

[0025] The specific application method of this dresser on a high-power non-magnetic ball surface grinder is as follows: S1: The height between the standard cylinder 32 and the allowance groove 11 is set to H1, the angle is zero, and the center distance between the rotating shaft 33 and the standard cylinder 32 is L. According to the sine principle, the height H of the gauge block group 7 to be placed is calculated as follows: H=H1-L*sinα, where α is the roller half angle. S2: Place the gauge block group 7 with the required height H between the standard cylinder 32 and the allowance groove 11. Rotate the two rotary adjustment screws 8 in opposite directions to drive the cylinder fixing plate 3 to rotate through the rotary shaft 33. The locking screw 14 slides in the arc groove 13. After the standard cylinder 32 and the gauge block group 7 are locked in position, rotate the locking screw 14 to press the shim 15 and the base plate 1 together. The base plate 1 and the cylinder fixing plate 3 are fixed in position for the second time. Turn the feed knob of the feed sleeve 5 to align the diamond pen 6 with the grinding wheel to be dressed. Start the drive cylinder 2. The slide plate 4 slides left and right on the dovetail slide rail 31 under the drive of the piston rod of the drive cylinder 2. The diamond pen 6 moves back and forth across the full width of the grinding wheel to dress it. The angle of the dressed grinding wheel is α.

[0026] S3: Control drive disks A and B to approach the dressing wheel, allowing simultaneous grinding of drive disks A and B.

[0027] S4: Add the same gauge block group 7 as H1, and when the angle is set to zero, use the diamond pen 6 to dress and grind the grinding wheel of the roller to be processed.

[0028] Because of its simple structure and compatibility with existing high-power non-magnetic ball-based surface grinders, this dresser can achieve the purpose of adjusting the grinding wheel angle and dressing the grinding wheel for grinding rollers without disassembling the grinding disc or grinding wheel. The final technical effects are as follows: Taking the HM518445 roller as an example, the precision of tooling grinding during model change is improved, making it quick, efficient, stable, and accurate. The angle accuracy can be accurate to the second, and the linear conversion of the angle accuracy can reach 0.001mm. After grinding, the drive disc runout is <0.003MM; the angle difference between the two drive discs is almost zero; the processing and production efficiency is improved, the machine setup time is shortened from an average of 14 hours to 5 hours, the surface roughness Ra of the ball base is increased from 0.25 to 0.1, and the radius of curvature dispersion is reduced from 15mm to 5mm. The new dresser can dress the grinding disc and grinding wheel, and when the angle is set to zero, it can also dress the grinding wheel for grinding the roller to be processed, making the grinding wheel rotation smoother and almost without vibration.

[0029] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A powerful non-magnetic ball-based surface grinding machine dresser, characterized in that... The grinding wheel assembly includes a base plate (1) fixed on the opposite side of the grinding wheel assembly, and the base plate (1) is located between two oppositely arranged drive discs. The grinding wheel assembly, drive discs and the base plate (1) are arranged in a cross shape. The top surface of the base plate (1) is rotatably connected to the cylinder fixing plate (3) via the rotary shaft (33). The top of the cylinder fixing plate (3) is fixedly connected to the dovetail slide rail (31). The slide plate (4) is slidably connected on the dovetail slide rail (31). A drive cylinder (2) is installed on one side of the cylinder fixing plate (3). The output end of the drive cylinder (2) is fixedly connected to the slide plate (4). A diamond pen (6) is installed on the top of the slide plate (4) via the feed sleeve (5). Two rotating adjusting screws (8) are provided on one side of the base plate (1) to drive the cylinder fixing plate (3) to tilt. A margin groove (11) is provided on the side of the base plate (1). A standard cylinder (32) is fixedly connected to the bottom of the cylinder fixing plate (3). The center of the standard cylinder (32) and the rotating shaft (33) are located on the same horizontal line. A gauge block group (7) is detachably connected within the distance between the standard cylinder (32) and the margin groove (11).

2. The powerful non-magnetic ball-based surface grinding machine dresser according to claim 1, characterized in that... The bottom surface of the base plate (1) is provided with an arc groove (13), and a locking screw (14) is inserted into the arc groove (13). The locking screw (14) is fixedly connected to the cylinder fixing plate (3), and a gasket (15) is provided between the locking screw (14) and the arc groove (13).

3. A powerful non-magnetic ball-based surface grinding machine dresser according to claim 2, characterized in that... The bottom plate (1) has a threaded hole (12) on its side, which is connected to the arc groove (13). The end of the rotating adjusting screw (8) is located in the arc groove (13), and the end of the rotating adjusting screw (8) is in contact with the locking screw (14).

4. A powerful non-magnetic ball-based surface grinding machine dresser according to claim 1, characterized in that... The base plate (1) has several positioning holes for fixing on the side away from the cylinder fixing plate (3).

5. A method for dressing the drive disc of a high-power non-magnetic ball surface grinder, characterized in that... The driving disk of the high-power non-magnetic ball-based surface grinding machine is dressed using a dresser according to any one of claims 1-4. The dressing method includes: S1: The height between the standard cylinder (32) and the allowance groove (11) is set to H1, the angle is zero, and the center distance between the rotating shaft (33) and the standard cylinder (32) is L. According to the sine principle, the height H of the block group (7) to be placed is calculated as follows: H=H1-L*sinα, where α is the roller half angle. S2: Place the gauge block group (7) with the required height H between the standard cylinder (32) and the allowance groove (11), rotate the two rotary adjustment screws (8) in opposite directions, drive the cylinder fixing plate (3) to rotate through the rotary shaft (33), and the locking screw (14) slides in the arc groove (13). After the standard cylinder (32) and the gauge block group (7) are locked in position, rotate the locking screw (14) to press the shim (15) and the base plate (1) together. The base plate (1) and the cylinder fixing plate (3) are fixed in position for the second time. Turn the feed knob of the feed sleeve (5) so that the diamond pen (6) is aligned with the grinding wheel to be dressed, and start the drive cylinder (2). The slide (4) slides left and right on the dovetail slide rail (31) driven by the piston rod of the drive cylinder (2), and the diamond pen (6) moves back and forth across the full width of the dressing wheel to achieve dressing of the grinding wheel. The angle of the dressing wheel is α. S3: Control drive disks A and B to approach the dressing wheel, allowing simultaneous grinding of drive disks A and B.

6. The method for dressing the drive disc of a high-power non-magnetic ball surface grinder according to claim 5, characterized in that... ,include: S4: Add a block group (7) equal to H1, and when the angle is set to zero, use the diamond pen (6) to dress the grinding wheel that grinds the roller to be processed.

Images