Grinding tool and method for balance block for bearing

Abstract

The invention discloses a bearing balance block grinding tool and method, and belongs to the technical field of bearing balance block machining. The technical problems that in the horizontal grinding machining process of an existing balance block with the contact face being an arc spherical face, due to the fact that the balance block cannot serve as an alignment reference, deviation is prone to occurring in the machining process, and the machining precision is insufficient are solved. The base comprises a plurality of first bosses evenly distributed in the horizontal circumferential direction, the abrasive paper is pasted to the top faces of the first bosses, the clamping block is in a cylindrical pipe shape, a conical hole is formed in the lower portion of the inner wall of the clamping block, four sets of positioning grooves are evenly formed in the upper end of the clamping block in the circumferential direction, and each set of positioning grooves is provided with two adjacent notches. A compression spring is sleeved on a second boss in the middle of the positioning groove, the upper portion of the rotating shaft is cylindrical, four groups of double-fork type positioning teeth are evenly arranged at the bottom of the rotating shaft in the circumferential direction, and the positioning teeth are installed in a notch of the positioning groove in a sliding mode in the vertical direction. And the machining precision is improved. The grinding device is used for grinding the balance block for the bearing.

Description

Technical Field

[0001] The invention relates to a grinding tool and method for a balancing block for a bearing, and belongs to the technical field of processing balancing blocks for bearings. Background Art

[0002] The grinding process for bearing balance weights requires precise adjustment of their shape to ensure dynamic balance in the bearing system during high-speed rotation, thereby reducing vibration, extending equipment life, and improving operational efficiency and safety. Through precise weight control and surface treatment, rotating machinery can be guaranteed to operate efficiently, smoothly, and safely.

[0003] The contact surface of a balance block used in a thrust bearing of a certain unit is a circular spherical surface. This surface requires carburizing and quenching, with a required roughness of Ra0.4. This roughness cannot be achieved using a lathe alone. Conventional methods require grinding with a custom-molded grinding wheel. However, since the remaining non-carburized surfaces of the workpiece are protected by copper plating, this coating cannot serve as a reference for alignment of the circular spherical surface. Horizontal grinding is prone to deviation, resulting in uneven or insufficient thickness of the carburized and quenched layer after re-grinding.

[0004] In summary, the existing horizontal grinding process of the balancing block with a circular spherical contact surface has the technical problem of easy deviation during processing and insufficient processing accuracy because the balancing block itself cannot be used as an alignment reference. Summary of the Invention

[0005] The present invention aims to solve the technical problem that in the existing horizontal grinding process of a balancing block with a circular arc spherical contact surface, the balancing block itself cannot serve as an alignment reference, resulting in deviation and insufficient machining accuracy. A balancing block grinding tool for a bearing is provided, which includes a base, a clamping block, a rotating shaft, a compression spring, and sandpaper. The base includes a plurality of first bosses evenly distributed along the horizontal circumferential direction, sandpaper is pasted on the top surface of the first boss, the clamping block is a cylindrical tube, the lower part of the inner wall of the clamping block is a tapered hole, the upper end of the clamping block is evenly provided with 4 groups of positioning grooves along the circumferential direction, each group of positioning grooves is provided with two adjacent notches, a compression spring is mounted on the second boss in the middle of the positioning groove, the upper part of the rotating shaft is set to be cylindrical, and the bottom of the rotating shaft is evenly provided with 4 groups of double-fork positioning teeth along the circumferential direction, the positioning teeth are vertically slidably installed in the notch of the positioning groove, the bottom surface of the compression spring is against the bottom surface of the notch of the positioning groove, and the top surface of the compression spring is against the bottom surface of the positioning tooth.

[0006] As another improvement of the present invention, an adhesive layer is provided on the adhesive surface of the sandpaper, and the thickness of the adhesive layer is 2 mm to 3 mm.

[0007] As another improvement of the present invention, the shape of the top surface of the first boss is obtained by enlarging the theoretical size of the grinding surface of the balancing block along the normal direction.

[0008] As another improvement of the present invention, four first bosses are provided along the circumferential cross direction.

[0009] As another improvement of the present invention, the width dimension of the first boss is smaller than the length dimension of the first boss.

[0010] As another improvement of the present invention, an external milling machine spindle clamps the upper part of the rotating shaft.

[0011] As another improvement of the present invention, the base is installed on an external milling machine worktable.

[0012] The present invention also provides a method comprising the following steps: S1. Apply sandpaper to the upper surfaces of the four first bosses on the upper part of the base; S2. Install the balance weight on the base, with the arc spherical surface of the balance weight fitting the sandpaper; S3. Turn the tapered hole at the lower end of the inner hole of the clamping block downward to fit it into the positioning cylindrical surface of the balancing block; S4. Press down and rotate the main shaft to grind the spherical surface of the balance block.

[0013] Beneficial effects of the present invention: The present invention provides a set of grinding tools for balancing weights for bearings. This tool can be used to grind the arc spherical surface of the balancing weight using a milling machine or an electric spindle, consuming sandpaper. There is no need to precisely align the balancing weight during grinding. The grinding contact surface can flexibly fit the product surface and can be adapted to batch production and a series of workpieces with a certain tolerance deviation range in the profile dimensions. The grinding removal can be guaranteed to be only 0.01 to 0.03 mm, and the removal is uniform. This effectively avoids the risk of high rotation speed of the workpiece sanded by a lathe, the problem that horizontal grinding requires precise conformity to the profile, the removal is large, and the thickness of the carburized layer is affected, and thus improves machining accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the overall structure of a set of balancing block grinding tools for bearings according to the present invention.

[0015] Figure 2 It is a cross-sectional schematic diagram of the base.

[0016] Figure 3 This is a top view of the base.

[0017] Figure 4 It is a cross-sectional schematic diagram of the clamping block.

[0018] Figure 5 Schematic diagram of the top view of the clamping block.

[0019] Figure 6 It is a cross-sectional schematic diagram of the rotating shaft.

[0020] Figure 7 It is a top view schematic diagram of the shaft. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the examples of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be explained that the positional relationships indicated by the terms "upper", "lower", "front", "back", etc. are only based on the positional relationships of the orientations shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the referred components have a specific orientation, are constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0022] Specific implementation method 1: Combination Figures 1 to 7 To describe this embodiment, this embodiment provides a balancing weight grinding tool for a bearing, which includes a base 1, a clamping block 2, a rotating shaft 3, a compression spring 4 and sandpaper 5; The base 1 includes a plurality of first bosses 6 evenly distributed along the horizontal circumferential direction, and the sandpaper 5 is pasted on the top surface of the first boss 6. The clamping block 2 is a cylindrical tube, and the lower part of the inner wall of the clamping block 2 is a tapered hole. The diameter range of the tapered hole can cover all the balancing block positioning cylinders of the same batch. The upper end of the clamping block 2 is evenly provided with 4 groups of positioning grooves along the circumferential direction, and each group of positioning grooves is provided with two adjacent notches 7. The second boss 8 in the middle of the positioning groove is provided with a compression spring 4. The upper part of the rotating shaft 3 is set to be cylindrical, and the bottom of the rotating shaft 3 is evenly provided with 4 groups of double-fork positioning teeth 9 along the circumferential direction. The positioning teeth 9 are vertically slidably installed in the notch 7 of the positioning groove. The bottom surface of the compression spring 4 is against the bottom surface of the notch 7 of the positioning groove, and the top surface of the compression spring 4 is against the bottom surface of the positioning tooth 9.

[0023] This tool can be used on a milling machine or electric spindle to grind the arc spherical surface of the balancing block using sandpaper. There is no need to precisely align the balancing block during grinding. The arc spherical surface of the balancing block to be ground can be used to automatically align the tool center. The balancing block can be ground by rotating the milling machine spindle. There is no need to align each balancing block, which improves processing efficiency. The grinding contact surface can flexibly fit the product surface and can be adapted to batch production and a series of workpieces with a certain tolerance deviation range in the profile dimensions. The grinding removal can be guaranteed to be only 0.01 to 0.03 mm, and the removal is uniform. This effectively avoids the risk of high speed of lathe sanding workpieces. The horizontal grinding process requires precise conformity to the profile, resulting in large removal and affecting the thickness of the carburized layer.

[0024] Specific implementation method 2: Combination Figures 1 to 7This embodiment differs from the first embodiment in that the adhesive layer of sandpaper 5 is provided on the adhesive surface. The adhesive layer is 2 to 3 mm thick. When the sandpaper is subjected to pressure, the adhesive backing undergoes a certain elastic deformation, ensuring that the entire surface of the sandpaper adheres tightly to the arc-shaped spherical surface of the balance weight. The remaining components and connection methods are the same as those of the first embodiment.

[0025] Specific implementation method three: Combination Figures 1 to 7 This embodiment differs from the first embodiment in that the top surface shape of the first boss 6 is derived from the theoretical dimensions of the grinding surface of the balancing weight, along the normal dimension. This normal dimensioning requires a dimension equal to half the thickness of the sandpaper. The upper contour of the base 1 is similar to the contour of the balancing weight's arc-shaped spherical surface, obtained by normal dimensioning by a certain value. Four notches are milled out along the circumference of this contour, leaving only four evenly spaced first bosses for subsequent attachment of the sandpaper 5. The remaining components and connection methods are identical to those of the first or second embodiments.

[0026] Specific implementation method four: Combination Figures 1 to 7 This embodiment is described. The difference between this embodiment and the first embodiment is that four first bosses 6 are evenly arranged along the circumferential direction. The other components and connection methods are the same as any one of the first to third embodiments.

[0027] Specific implementation method five: Combination Figures 1 to 7 This embodiment differs from the first embodiment in that the width of the first boss 6 is smaller than its length. This design improves the aspect ratio of the first boss, reduces the variability of the linear curvature of the first boss, and improves the adhesion of the sandpaper 5. The remaining components and connection methods are the same as those of any of the first to fourth embodiments.

[0028] Specific implementation method six: combination Figures 1 to 7 This embodiment differs from the first embodiment in that an external milling machine spindle clamps the upper portion of the rotating shaft 3. The milling machine clamps the rotating shaft, facilitating machining operations. The remaining components and connections are identical to any of the first through fifth embodiments.

[0029] Specific implementation method seven: combination Figures 1 to 7 This embodiment differs from the first embodiment in that the base 1 is mounted on an external milling machine work surface. The base is secured using the milling machine, facilitating machining operations. The remaining components and connections are identical to any of the first through sixth embodiments.

[0030] Specific embodiment eight: This embodiment provides a method, characterized in that the method is based on the bearing balancing weight grinding tool described in specific embodiment one, and includes the following steps: S1. Attach sandpaper 5 to the upper surfaces of the four first bosses 6 on the upper portion of the base 1; S2. Install the balancing weight on the base 1, so that the arc spherical surface of the balancing weight fits the sandpaper 5; S3. Turn the tapered hole at the lower end of the inner hole of the clamping block 2 downward to fit it with the positioning cylindrical surface of the balancing block; S4. Press down and rotate the main shaft to grind the spherical surface of the balance block.

[0031] Attach sandpaper 5 with 2mm adhesive backing to the four contoured bosses on the top of base 1. Secure base 1 on the milling machine work surface. Align the milling machine spindle with the inner hole or outer circle of the base.

[0032] Install the balancing weight on base 1, with the arc spherical surface of the balancing weight aligned with the sandpaper. Turn the tapered hole at the lower end of the inner hole of clamping block 2 downward, so that it aligns with the positioning cylindrical surface of the balancing weight. Install compression springs 4 on the four sets of second bosses of clamping block 2.

[0033] The milling machine spindle clamps the upper cylindrical portion of the rotating shaft 3, and the four bifurcated positioning teeth 9 at the lower end are inserted into the four sets of positioning grooves in the clamping block 2. The spindle presses down on the compression spring 4, exerting a downward force on the clamping block 2, ensuring that the clamping block 2 can align the balancing block through the inner tapered hole, clamp it, and drive the balancing block to rotate.

[0034] By rotating the main shaft, the main shaft can drive the rotating shaft 3, press and move the clamping block 4 to drive the balancing block to rotate, and grind the spherical surface of the balancing block.

[0035] The downward force exerted by the compression spring 4 on the balancing weight acts on the sandpaper 5, and the adhesive on the sandpaper 5 produces a certain elastic deformation, ensuring that the entire surface of the sandpaper 5 can fit tightly with the arc spherical surface of the balancing weight.

[0036] Due to the double-fork structure at the bottom of the rotating shaft 3, it is inserted into the four groups of positioning grooves of the clamping block 2. There is no need to ensure circumferential positioning. The clamping block 2 and the balancing block can be driven to rotate by the rotation of the main shaft. The position deviation of the balancing block after installation will not affect the grinding effect.

[0037] The sandpaper 5 can be replaced after a certain amount of grinding.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A balancing block grinding tool for a bearing, characterized in that It includes a base (1), a clamping block (2), a rotating shaft (3), a compression spring (4) and sandpaper (5); The base (1) includes a plurality of first bosses (6) uniformly distributed along the horizontal circumferential direction, and sandpaper (5) is pasted on the top surface of the first boss (6). The clamping block (2) is cylindrical, and the lower part of the inner wall of the clamping block (2) is formed into a tapered hole. The upper end of the clamping block (2) is uniformly provided with four groups of positioning grooves along the circumferential direction, and each group of positioning grooves is provided with two adjacent notches (7). A compression spring (4) is mounted on the second boss (8) in the middle of the positioning groove. The upper part of the rotating shaft (3) is set to be cylindrical, and the bottom of the rotating shaft (3) is uniformly provided with four groups of double-fork positioning teeth (9) along the circumferential direction. The positioning teeth (9) are vertically slidably installed in the notch (7) of the positioning groove, and the bottom surface of the compression spring (4) abuts against the bottom surface of the notch (7) of the positioning groove, and the top surface of the compression spring (4) abuts against the bottom surface of the positioning teeth (9).

2. A bearing balancing weight grinding tool according to claim 1, characterized in that: The adhesive surface of the sandpaper (5) is provided with an adhesive layer, and the thickness of the adhesive layer is 2 mm to 3 mm.

3. A bearing balancing weight grinding tool according to claim 1, characterized in that: The shape of the top surface of the first boss (6) is obtained by measuring the theoretical size of the grinding surface of the balancing block along the normal direction.

4. A bearing balancing weight grinding tool according to claim 1, characterized in that: Four first bosses (6) are evenly arranged along the circumferential direction.

5. A balancing weight grinding tool for a bearing according to claim 4, characterized in that: The width dimension of the first boss (6) is smaller than the length dimension of the first boss (6).

6. A balancing weight grinding tool for a bearing according to claim 1, characterized in that: The external milling machine spindle clamps the upper part of the rotating shaft (3).

7. A bearing balancing weight grinding tool according to claim 1, characterized in that: The base (1) is mounted on an external milling machine work surface.

8. A method, characterized in that The method is based on the bearing balancing weight grinding tool according to claim 1, comprising the following steps: S1, attaching sandpaper (5) to the upper surfaces of the four first bosses (6) on the upper part of the base (1); S2. Install the balancing block on the base (1), with the arc spherical surface of the balancing block fitting the sandpaper (5); S3, turn the tapered hole at the lower end of the inner hole of the clamping block (2) downwards to fit it with the positioning cylindrical surface of the balancing block; S4. Press down and rotate the main shaft to grind the spherical surface of the balance block.

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