High-speed high-precision ceramic bond grinding wheel for machining automobile transmission shaft

Abstract

The high-speed and high-precision ceramic bond grinding wheel for machining the automobile gearbox shaft comprises a fixing piece connected with a rotating shaft and a grinding face arranged on the fixing piece, a pressing disc connected with the rotating shaft in a clamped mode is arranged on the far end face of the fixing piece, and a connecting disc connected to one side of the pressing disc in a pressed mode is arranged at the center of the grinding face. The front face of the connecting disc is in bolted connection with the rotating shaft through the pressing disc, the triangular limiting column is arranged on the back face of the pressing disc, and the top of the limiting column faces outwards, so that the amount of displacement of the grinding tool under rotation of high-speed centrifugal force is reduced, stable high-speed rotation of the grinding tool is guaranteed, the grinding precision of the gearbox shaft is higher, and the yield is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of gearbox shaft processing, in particular to a high-speed and high-precision ceramic bond grinding wheel for processing automobile gearbox shafts. Background Art

[0002] Vitrified bond grinding wheels have the characteristics of long life, sharp cutting, high efficiency, not easy to heat up and clog during grinding, easy to control processing accuracy and convenient dressing. They have been used more and more widely and are suitable for precision grinding of various cemented carbides, ceramics, glass, jewelry, molds and tools.

[0003] In the vehicle processing industry, it is often necessary to use grinding wheels to grind workpieces to a predetermined accuracy, especially in the process of machining automobile gearbox shafts. Usually, the grinding of a gearbox shaft workpiece requires multiple grinding processes such as coarse grinding, fine grinding and fine grinding. After each grinding, it is necessary to replace a grinding wheel with a smaller abrasive particle size until the workpiece is ground to a predetermined accuracy. When using a disc grinding wheel for fine grinding and fine grinding, the gearbox shaft has multiple step surfaces that require grinding of the chamfers. Most of the existing grinding wheels are ceramic bond grinding wheels, but the rotating shafts of the existing fixed grinding wheels are mostly fixed with pressure plates for easy replacement in the later stage. Due to the high speed during the fine grinding process, the grinding wheel will slide slightly under the fixation of the pressure plate, resulting in eccentricity between the grinding wheel and the rotating shaft. In severe cases, it will cause dimensional deviation of the gearbox shaft, increase the uncontrollability during production, and affect production efficiency. Utility Model Content

[0004] The utility model aims to overcome the disadvantages of the prior art that the grinding wheel will produce displacement when rotating at high speed, which affects the effect of precision grinding, and provide a high-speed and high-precision ceramic bond grinding wheel for machining automobile gearbox shafts.

[0005] The utility model is realized through the following technical scheme: a high-speed and high-precision ceramic bond grinding wheel for processing automobile gearbox shafts, comprising a fixing part connected to a rotating shaft and a grinding surface arranged on the fixing part, a far end surface of the fixing part is provided with a pressure plate clamped with the rotating shaft, a connecting plate crimped on one side of the pressure plate is provided at the center position of the grinding surface, the front side of the connecting plate is bolted to the rotating shaft through the pressure plate, and a triangular limiting column is provided on the back side of the pressure plate, and the top of the limiting column faces outward.

[0006] Furthermore, the middle position of the pressure plate is provided with a through-hole, the side surface of the pressure plate is arc-shaped, and the end surface of the pressure plate is provided with a connecting hole.

[0007] Furthermore, a limiting column for passing through the limiting hole is arranged on the connecting disk, and the limiting column passes through the connecting disk and is clamped with the fixing piece.

[0008] Furthermore, the connecting plate is connected to the pressure plate via hexagon socket bolts.

[0009] Furthermore, the side surface of the grinding surface is configured as an inclined arc surface.

[0010] Furthermore, a positioning hole is provided on the side of the connecting plate.

[0011] The beneficial effects of the utility model are as follows: a connecting plate crimped on one side of the pressure plate is arranged at the center position of the grinding surface, the connecting plate is a metal plate, and the connection between the connecting plate and the grinding surface is arranged to be an arc surface, which increases the structural strength of the connection, ensures stability during high-speed rotation, prevents breakage at the connection, ensures the service life and safety, the back of the grinding surface and the connecting plate are flat, and the pressure plate is used to press the two grinding tools and the connecting plates during bidirectional chamfer grinding, and the limiting posts pass through the limiting holes on the two connecting plates and are clamped with the fixing parts, eliminating the action of turning the rotating shaft 180 degrees and reducing the grinding time. The triangular limiting posts increase the contact area with the fixing parts, and at the same time, the triangular inclined surface separates the centrifugal force exerted on the connecting plate to both sides. Compared with the circular limiting holes, the stability during high-speed rotation is ensured, the displacement of the grinding tool under the rotation of high-speed centrifugal force is reduced, and the stable high-speed rotation of the grinding tool is ensured, so that the grinding accuracy of the gearbox shaft is higher and the yield rate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an overall schematic diagram of the utility model;

[0013] Figure 2 It is a schematic diagram of the back structure of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the connecting disc and the grinding tool of the utility model;

[0015] Figure 4 This is a schematic diagram of the pressure plate structure of the utility model;

[0016] Figure 5 This is a schematic diagram of the two back-side bonding structures of the utility model

[0017] Among them: 1. pressure plate; 2. connecting plate; 201. limiting hole; 202. hexagon socket bolt; 203. connecting hole; 3. grinding surface. DETAILED DESCRIPTION

[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example 1

[0021] like Figure 1-5 As shown: A high-speed and high-precision ceramic bond grinding wheel for processing automobile gearbox shafts, including a fixing part connected to a rotating shaft and a grinding surface 3 arranged on the fixing part, the grinding surface 3 is made of a ceramic bond, and the side surface of the grinding surface 3 is arranged as an inclined arc surface. When processing the gearbox shaft, the use of the curved grinding surface 3 can ensure fine processing of the chamfer, and at the same time is easy to control, which is convenient for setting the action of the CNC lathe and ensuring the fine grinding effect.

[0022] The far end surface of the fixing part is provided with a pressure plate 1 which is clamped with the rotating shaft. The middle position of the pressure plate 1 is penetrated. The side surface of the pressure plate 1 is arc-shaped. The end surface of the pressure plate 1 is provided with connecting holes 203. There are six connecting holes 203. The fixing part is bolted to the rotating shaft. The diameter of the fixing part is large or small. Fixing parts of different diameters are selected according to the size of different grinding surfaces 3, which is convenient for replacement on the rotating shaft. The use of different grinding surfaces 3 is simple to adjust and easy to use.

[0023] A connecting plate 2 is provided at the center of the grinding surface 3, which is crimped on one side of the pressure plate 1. The connecting plate 2 is a metal plate. The connection between the connecting plate 2 and the grinding surface 3 is set as an arc surface to increase the structural strength of the connection, ensure stability during high-speed rotation, prevent breakage at the connection, and ensure the service life and safety. The front of the connecting plate 2 is bolted to the rotating shaft through the pressure plate 1. A chamfer is set at the abutment between the pressure plate 1 and the connecting plate 2 to ensure the stability of the connection. The connecting plate 2 is bolted to the pressure plate 1 through the hexagon socket bolts 202. The backs of the grinding surface 3 and the connecting plate 2 are flat. When performing bidirectional chamfering, the pressure plate 1 is used to press the two grinding tools and the connecting plate 2. The limiting column passes through the limiting holes 201 on the two connecting plates 2 and is clamped with the fixing part, which eliminates the action of the rotating shaft turning 180 degrees, reduces the grinding time, and improves the use effect.

[0024] A triangular limiting column is provided on the back of the pressure plate 1, and the top of the limiting column faces outward. A limiting column 201 for passing through the limiting hole is provided on the connecting plate 2. The limiting column passes through the connecting plate 2 and is engaged with the fixing piece. A positioning hole is provided on the side of the connecting plate 2. During each installation, the triangular limiting column is passed through the limiting hole 201, and the connecting plate 2 and the pressure plate 1 are fixed using the hexagon socket bolt 202. The hexagon socket bolt 202 is inside the connecting plate 2, and then the connecting plate 2 is connected to the fixing piece by passing the bolt through the connecting hole 203. When in use, the rotating shaft drives the fixing piece to rotate at a high speed. The triangular limiting column increases the contact area with the fixing piece. At the same time, the triangular inclined surface separates the centrifugal force exerted on the connecting plate 2 to both sides. Compared with the circular limiting hole 201, the stability during high-speed rotation is guaranteed, the displacement of the mold under the rotation of high-speed centrifugal force is reduced, the stable and high-speed rotation of the mold is guaranteed, the grinding accuracy of the gearbox shaft is higher, and the yield rate is improved.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed and high-precision ceramic bond grinding wheel for machining an automobile gearbox shaft, comprising a fixing part connected to a rotating shaft and a grinding surface arranged on the fixing part, characterized in that: The distal end surface of the fixing part is provided with a pressure plate clamped with the rotating shaft, the center position of the grinding surface is provided with a connecting plate crimped on one side of the pressure plate, the front side of the connecting plate is bolted to the rotating shaft through the pressure plate, and the back side of the pressure plate is provided with a triangular limiting column, and the top of the limiting column faces outward.

2. The high-speed and high-precision ceramic bond grinding wheel for machining automobile gearbox shaft according to claim 1 is characterized in that: The middle position of the pressure plate is penetrated, the side surface of the pressure plate is arc-shaped, and the end surface of the pressure plate is provided with a connecting hole.

3. The high-speed and high-precision ceramic bond grinding wheel for machining automobile gearbox shaft according to claim 1, characterized in that: The connection plate is provided with a limiting column for passing through the limiting hole, and the limiting column passes through the connection plate and is clamped with the fixing piece.

4. The high-speed and high-precision ceramic bond grinding wheel for machining automobile gearbox shaft according to claim 1, characterized in that: The connecting plate is connected to the pressure plate via hexagon socket bolts.

5. The high-speed and high-precision ceramic bond grinding wheel for machining automobile gearbox shaft according to claim 1, characterized in that: The side surface of the grinding surface is configured as an inclined arc surface.

6. The high-speed and high-precision ceramic bond grinding wheel for machining automobile gearbox shaft according to claim 1, characterized in that: A positioning hole is arranged on the side of the connecting plate.

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