Grinding device for inner ring notch of double-row cylindrical roller bearing

Abstract

The utility model discloses a grinding device for a gap of an inner ring of a double-row cylindrical roller bearing, which comprises a positioning seat, a pressing plate, a grinding wheel, a grinding wheel connecting rod and a connecting piece, and the connecting piece comprises a first connecting piece and a second connecting piece; wherein the positioning seat is used for supporting a bearing inner ring to be ground, and the positioning seat is detachably connected with a workbench of a grinding machine through a first connecting piece; the pressing plate is used for clamping a bearing inner ring to be ground, the pressing plate is located above the positioning seat, and the pressing plate is detachably connected with the positioning seat through a second connecting piece; the grinding wheel is used for grinding a bearing inner ring clamped between the pressing plate and the positioning seat, and the grinding wheel connecting rod is connected with the grinding wheel and detachably connected with the grinding machine. According to the grinding device, through mutual matching of the positioning base, the pressing plate and the grinding wheel, the utilization rate of equipment is improved, meanwhile, the production efficiency is improved, and the grinding device is simple in overall structure, convenient to assemble and operate and suitable for application and popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing processing, in particular to a grinding device for inner ring notches of double-row cylindrical roller bearings. Background Art

[0002] Cylindrical roller bearings are separable bearings that can withstand large radial loads and are suitable for use in high-speed applications. Their ease of installation and disassembly makes them suitable for a wide range of applications. Cylindrical roller bearings feature parallel rollers with spacers or spacers between them to prevent roller tilt and friction, effectively preventing an increase in rotational torque. Cylindrical roller bearings are available in single-row, double-row, and multi-row configurations, depending on the number of rows of rolling elements.

[0003] Double-row cylindrical roller bearings have two structures: cylindrical inner bore and conical inner bore. This type of bearing has the advantages of compact structure, high rigidity, large load-bearing capacity, and small deformation under load, and is particularly suitable for machine tool spindle support. The conical inner bore can also play a role in fine-tuning the clearance, and can simplify the positioning device structure, making installation and disassembly convenient. In the actual processing and preparation process, for the bearing inner ring used in double-row cylindrical roller bearings, the bearing inner ring is the supporting structure for the rollers, and the bearing inner ring is provided with a notch, and the shape of the notch is as follows: Figure 1 and Figure 2 As shown, the surface roughness of the notch is required to reach 0.8. To achieve this machining accuracy, the notch needs to be ground. Currently, this is done on a semi-automatic internal cylindrical grinder, model M228, manufactured in 1968. Due to its long service life, the equipment has lost precision and is subject to frequent maintenance. Furthermore, due to the inherent design characteristics of the equipment, operation is largely manual, making it difficult to control the notch depth and arc R. The poorly controlled notch surface roughness leads to a high rework rate and easily results in scrap. The existing equipment can no longer meet the product's size, precision, and production requirements.

[0004] Currently, there is no dedicated equipment for grinding notches. After inspecting the existing equipment on site, the company selected an MZ2015E automatic internal cylindrical grinder, manufactured in 2007. Because this CNC grinder, with both grinding wheel feed and dressing compensation driven by servo motors, offers stable and reliable automatic cycles, its application in this grinding process allows for automated processing, significantly improving production efficiency. Therefore, in order to fully utilize the existing MZ2015E automatic internal cylindrical grinder and meet the needs for grinding notches in bearing inner rings, it was essential to provide a convenient grinding device that would reduce processing costs while also meeting product requirements. Utility Model Content

[0005] The technical problem to be solved by the present invention is to address the problems existing in the background technology. In order to meet the demand for grinding the gap of the inner ring of the bearing, a grinding device that is easy to operate is provided. By using this grinding device, the existing MZ2015E automatic internal cylindrical grinder equipment can be fully utilized to meet the demand for grinding the gap of the inner ring of the bearing. Specifically, it is a grinding device for the gap of the inner ring of a double-row cylindrical roller bearing.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a grinding device for the inner ring notch of a double-row cylindrical roller bearing, comprising a positioning seat, a pressure plate, a grinding wheel, a grinding wheel connecting rod and a connecting piece, the connecting piece comprising a first connecting piece and a second connecting piece; wherein, the positioning seat is used to support the inner ring of the bearing to be ground, and the positioning seat is detachably connected to the workbench of the grinding machine through the first connecting piece; the pressure plate is used to clamp the inner ring of the bearing to be ground, the pressure plate is located above the positioning seat, and the pressure plate is detachably connected to the positioning seat through the second connecting piece; the grinding wheel is used to grind the inner ring of the bearing clamped between the pressure plate and the positioning seat, the grinding wheel is connected to the grinding wheel connecting rod, and the grinding wheel connecting rod is detachably connected to the grinder for providing grinding power.

[0007] Furthermore, a grinding device for the inner ring notch of a double-row cylindrical roller bearing described in the utility model is adopted, wherein the first connecting member is a positioning screw, and a plurality of positioning screw holes matching the positioning screw are provided in the positioning seat, and the plurality of positioning screw holes are evenly distributed in a ring shape in the positioning seat, and the positioning seat is detachably fixed to the grinding machine workbench by positioning screws passing through the positioning screw holes.

[0008] Furthermore, a grinding device for the inner ring notch of a double-row cylindrical roller bearing described in the utility model is adopted, wherein the positioning seat is arranged as a circular structure, four positioning screws are provided, four positioning screw holes are provided, and they correspond one to one with the positioning screws, and the four positioning screw holes are evenly distributed in a ring shape in the positioning seat, and the positioning seat is detachably fixed to the grinding machine workbench by four positioning screws passing through the corresponding positioning screw holes.

[0009] Furthermore, a grinding device for the inner ring notch of a double-row cylindrical roller bearing described in the utility model is adopted, wherein the second connecting member is a connecting screw, a guide hole matching the connecting screw is provided in the pressure plate, and a connecting blind hole corresponding to the connecting screw is provided in the positioning seat, and the pressure plate is connected to the connecting blind hole in the positioning seat by the connecting screw passing through the guide hole, thereby realizing a detachable connection between the pressure plate and the positioning seat.

[0010] Furthermore, a grinding device for the inner ring notch of a double-row cylindrical roller bearing described in the utility model is adopted, wherein the pressure plate is arranged as a plate structure, the two ends of the pressure plate are arranged as arc transition structures, the length of the pressure plate is greater than the outer diameter of the inner ring of the bearing to be ground, the guide hole is arranged at the center position of the pressure plate, and an open groove communicating with the guide hole is also provided in the pressure plate.

[0011] Furthermore, the grinding device for the inner ring notch of a double-row cylindrical roller bearing described in the utility model also includes a third connecting member, which is a limit pin. Two limit pins are provided, and a limit blind hole corresponding to the limit pin is provided in the positioning seat. The limit pin is detachably connected to the positioning seat through the limit blind hole, and the limit pin is in contact with the inner wall surface of the bearing inner ring clamped between the pressure plate and the positioning seat.

[0012] The utility model discloses a grinding device for inner ring notches of double-row cylindrical roller bearings. The device utilizes a positioning seat and a pressure plate to support and clamp the inner ring of the bearing. A grinding wheel is connected to an existing MZ2015E automatic internal grinding machine via a grinding wheel connecting rod. The grinding wheel connecting rod drives the grinding wheel to rotate and move up and down, thereby grinding the inner ring of the bearing clamped between the pressure plate and the positioning seat. The grinding wheel dresser configured in the MZ2015E automatic internal grinding machine automatically controls the number of dressing cycles and the dressing speed of the grinding wheel, enabling precise setting of parameters such as the feed rate and feed speed. Through grinding, the notch depth, radian, and surface roughness meet product requirements, effectively solving the grinding problem of roller notches in the inner ring of double-row cylindrical roller bearings. Final inspection demonstrates improved precision of the ground product, reduces operator labor intensity, lowers processing costs, and improves economic efficiency, meeting actual production needs.

[0013] It can be seen that by adopting the grinding device described in the present invention, on the basis of the existing grinding machine, the dimensional accuracy and appearance quality of the ground products are greatly improved through the mutual cooperation of the configured positioning seat, pressure plate and grinding wheel. Both P5 and P4 grade products can be processed, which not only improves the utilization rate of the equipment, but also greatly improves the production efficiency. Its overall structure is simple, easy to assemble and operate, and suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be described in further detail below with reference to the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the structure of the inner ring of the bearing to be ground;

[0016] Figure 2 yes Figure 1 A magnified schematic diagram of the K-direction structure;

[0017] Figure 3 It is a structural diagram of the utility model;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0019] As shown in the figure: 1- positioning seat, 2- pressure plate, 3- grinding wheel, 31- grinding wheel connecting rod, 4- first connecting piece, 5- second connecting piece, 6- third connecting piece, 7- workbench, 8- bearing inner ring. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0021] like Figure 3 and Figure 4 As shown, this embodiment provides a grinding device for the inner ring notch of a double-row cylindrical roller bearing, including a positioning seat 1, a pressure plate 2, a grinding wheel 3, a grinding wheel connecting rod 31 and a connecting member, wherein the connecting member includes a first connecting member 4 and a second connecting member 5; wherein, the positioning seat 1 is used to support the bearing inner ring 8 to be ground, and the positioning seat 1 is detachably connected to the workbench 7 of the grinding machine through the first connecting member 4; the pressure plate 2 is used to clamp the bearing inner ring 8 to be ground, and the pressure plate 2 is located above the positioning seat 1, and the pressure plate 2 is detachably connected to the positioning seat 1 through the second connecting member 5; the grinding wheel 3 is used to grind the bearing inner ring 8 clamped between the pressure plate 2 and the positioning seat 1, and the grinding wheel 3 is connected to the grinding wheel connecting rod 31, and the grinding wheel connecting rod 31 is detachably connected to the grinder for providing grinding power.

[0022] The first connecting member 4 is a positioning screw. The positioning seat 1 is provided with a plurality of positioning screw holes that match the positioning screws. The plurality of positioning screw holes are evenly distributed in a ring shape in the positioning seat 1. The positioning seat 1 is removably fixed to the workbench 7 of the grinding machine by passing the positioning screws through the positioning screw holes. The second connecting member 5 is a connecting screw. The pressure plate 2 is provided with a guide hole that matches the connecting screw, and the positioning seat 1 is provided with a connecting blind hole corresponding to the connecting screw. The pressure plate 2 is connected to the connecting blind hole in the positioning seat 1 by the connecting screw passing through the guide hole, thereby achieving a detachable connection between the pressure plate 2 and the positioning seat 1.

[0023] Furthermore, a grinding device for the inner ring notch of a double-row cylindrical roller bearing described in this embodiment is adopted, wherein the positioning seat 1 is configured as a circular structure, four positioning screws are provided, and four positioning screw holes are provided. The four positioning screw holes are evenly distributed in a ring shape in the positioning seat 1 and correspond one-to-one to the positioning screws. The positioning seat 1 is detachably fixed to the workbench 7 of the grinding machine by passing four positioning screws through the corresponding positioning screw holes; and the pressure plate 2 is configured as a plate structure, and both ends of the pressure plate 2 are configured as arc transition structures. The length of the pressure plate 2 is greater than the outer diameter of the bearing inner ring 8 to be ground, and the guide hole is provided at the center position of the pressure plate 2, and an open groove communicating with the guide hole is also provided in the pressure plate 2. Example 2

[0024] This embodiment is based on the first embodiment. In order to better support and stabilize the bearing inner ring 8 clamped between the pressure plate 2 and the positioning seat 1 and prevent the grinding wheel 3 from causing unstable factors such as shaking of the bearing inner ring 8 during the grinding process, the grinding device is further provided with a third connecting member 6. The third connecting member 6 is a limit pin. There are two limit pins. The positioning seat 1 is provided with a limit blind hole corresponding to the limit pin. The limit pin is detachably connected to the positioning seat 1 through the limit blind hole. The limit pin is in contact with the inner wall surface of the bearing inner ring 8 clamped between the pressure plate 2 and the positioning seat 1. The two limit pins provided in the positioning seat 1 are in contact with the inner wall surface of the bearing inner ring 8, which can enhance its stability and facilitate grinding.

[0025] The present invention describes a device for grinding the inner ring notches of double-row cylindrical roller bearings. The improvement concept is that, when processing this series of products using the original M228 equipment, the operator manually dresses the grinding wheel by holding the grinding wheel block. The dimensional feed is manually moved by the feed plate (commonly known as cranking the handle) and then reads the dial, relying entirely on the operator's experience and skill. This makes it difficult to control the notch depth and the R during grinding. This results in a rough surface that fails to meet the required notch quality, a high rework rate, and a high level of waste. To meet the processing requirements of the product, the existing equipment was improved, employing the existing MZ2015E automatic internal grinding machine. Because the existing MZ2015E automatic internal grinding machine is CNC-controlled, the grinding wheel feed and dressing compensation are driven by servo motors, resulting in a stable and reliable automatic cycle. All dimensions and precision requirements are met. Therefore, on the basis of the original structure, without destroying the original function, the positioning seat 1, the pressing plate 2, the grinding wheel 3 and the grinding wheel connecting rod 31 are added, and its practicality is enhanced.

[0026] It can be seen that the existing MZ2015E automatic internal cylindrical grinder is used, through the configured positioning seat 1, pressure plate 2 and grinding wheel 3, the positioning seat 1 and pressure plate 2 are used to support and clamp the bearing inner ring 8, and it is connected to the existing MZ2015E automatic internal cylindrical grinder equipment through the grinding wheel connecting rod 31. The grinding wheel connecting rod 31 drives the grinding wheel 3 to rotate and move up and down, thereby realizing the grinding of the bearing inner ring 8 clamped between the pressure plate 2 and the positioning seat 1. For this series of products processed on the MZ2015E equipment, the dressing of the grinding wheel (dressed by a grinding wheel dresser) and the dimensional feed are both numerically controlled and can be automatically controlled. The dressing frequency and dressing speed of grinding wheel 3 can be precisely set, as can the dimensional feed amount and feed speed. Therefore, the notch depth dimension, the accuracy of the arc R, and the surface roughness all meet the product requirements. This solves the problem of grinding the roller notch of the inner ring of double-row cylindrical roller bearings, improves the processing accuracy of the products, reduces the labor intensity of the operator, improves the economic benefits, and meets production needs.

[0027] To sum up, by adopting the grinding device described in the present invention, on the basis of the existing MZ2015E automatic internal cylindrical grinder, through the mutual cooperation of the configured positioning seat 1, the pressure plate 2 and the grinding wheel 3, the dimensional accuracy and appearance quality of the products ground by the MZ2015E automatic internal cylindrical grinder equipment are greatly improved, and both P5 and P4 grade products can be processed, which not only improves the utilization rate of the equipment, but also greatly improves the production efficiency. Its overall structure is simple, easy to assemble and operate, and suitable for promotion and application.

[0028] Other aspects of the present invention that are not described in detail are conventional technologies known to those skilled in the art and are therefore not described in detail.

[0029] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. The above description is only a preferred implementation method of the present invention and does not limit the present invention. Any minor modifications, equivalent replacements and improvements made based on the technical solutions of the present invention should be included in the protection scope of the technical solutions of the present invention.

Claims

1. A grinding device for inner ring notch of double-row cylindrical roller bearing, characterized in that: Includes: A positioning seat, the positioning seat is used to support the inner ring of the bearing to be ground, and the positioning seat is detachably connected to the workbench of the grinding machine through a first connecting member; A pressing plate, which is used to clamp the bearing inner ring to be ground, is located above the positioning seat and is detachably connected to the positioning seat via a second connecting member; A grinding wheel, the grinding wheel is used for grinding the inner ring of the bearing clamped between the pressure plate and the positioning seat; A grinding wheel connecting rod is connected to the grinding wheel and is detachably connected to a grinding machine for providing grinding power.

2. A grinding device for inner ring notches of double-row cylindrical roller bearings according to claim 1, characterized in that: The first connecting member is a positioning screw, and a plurality of positioning screw holes matching the positioning screw are provided in the positioning seat. The plurality of positioning screw holes are evenly distributed in the positioning seat in a ring shape, and the positioning seat is detachably fixed to the grinding machine workbench by positioning screws passing through the positioning screw holes.

3. The grinding device for inner ring notch of double-row cylindrical roller bearing according to claim 2, characterized in that: The positioning seat is set to a circular structure, there are four positioning screws, there are four positioning screw holes, and they correspond one to one with the positioning screws. The four positioning screw holes are evenly distributed in the positioning seat in a ring shape. The positioning seat is detachably fixed to the grinding machine workbench by four positioning screws passing through the corresponding positioning screw holes.

4. The grinding device for inner ring notch of double-row cylindrical roller bearing according to claim 1, characterized in that: The second connecting member is a connecting screw. A guide hole matching the connecting screw is provided in the pressure plate, and a connecting blind hole corresponding to the connecting screw is provided in the positioning seat. The pressure plate is connected to the connecting blind hole in the positioning seat by the connecting screw passing through the guide hole, thereby realizing a detachable connection between the pressure plate and the positioning seat.

5. The grinding device for inner ring notch of double-row cylindrical roller bearing according to claim 4, characterized in that: The pressure plate is configured as a plate structure, and both ends of the pressure plate are configured as arc transition structures. The length of the pressure plate is greater than the outer diameter of the inner ring of the bearing to be ground. The guide hole is configured at the center of the pressure plate, and an open groove communicating with the guide hole is also configured in the pressure plate.

6. The grinding device for inner ring notch of double-row cylindrical roller bearing according to claim 1, characterized in that: It also includes a third connecting member, which is a limit pin. There are two limit pins. A limit blind hole corresponding to the limit pin is provided in the positioning seat. The limit pin is detachably connected to the positioning seat through the limit blind hole. The limit pin is in contact with the inner wall surface of the bearing inner ring clamped between the pressure plate and the positioning seat.

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