Spherical sealing gasket grinding tool

Abstract

The utility model discloses a spherical sealing gasket grinding tool which comprises a grinding tool body (1) with a grinding cambered surface (11) arranged at the lower end, a through mounting hole (12) is formed in the grinding tool body, and a clamping handle (2), a steel ball (3), a spring (4) and a jacking column (5) with a flange are sequentially arranged in the mounting hole from top to bottom. The lower part of the clamping handle is inserted into the mounting hole and is fixedly connected with the grinding tool body; the spring is sleeved on the top column, the lower end of the spring abuts against the flange of the top column, and the upper end of the spring abuts against the steel ball to enable the steel ball to abut against the lower end of the clamping handle. The lower portion of the jacking column extends out of the grinding tool body through a spring, the flange of the jacking column and the mounting hole form axial limiting for downward movement, and the lower end of the jacking column is provided with a pressing arc face (51) which is matched with the sealing gasket and forms pressing fit with the sealing gasket. According to the utility model, the operation efficiency and the operation safety are improved, and the labor intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and particularly relates to a grinding tool for a spherical sealing gasket. Background Art

[0002] In a military compressor, a sealing gasket with a spherical surface, as a sealing member of a valve plate, is an essential part for assembling a cylinder head. It can play a role in pressure relief and pressure maintenance through the action of the valve. Therefore, the surface roughness of the sealing gasket has certain quality requirements. At present, the sealing gasket is made by stamping an S30408 stainless steel strip with a thickness of δ1.1 - δ1.8. It is a matte material. After heat treatment and pickling passivation, the surface is rough and uneven, and it needs to be ground to improve the surface roughness.

[0003] The conventional grinding method is to use a special grinding tooling to grind on a lathe. As Figure 1 shown, a positioning rod 92 fixed with a sealing gasket 93 is clamped on a lathe spindle 91. The grinding end of the sealing gasket 93 is axially pressed through a live center 96 via a push rod 95. A grinding body 94 sleeved on the push rod 95 is ground manually. In this way, the grinding body is moved manually for grinding, with low work efficiency, high overall labor intensity, and it is easy to touch the rotating workpiece, having potential safety hazards. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model provides a grinding tool for a spherical sealing gasket.

[0005] The technical solution of the present application is as follows:

[0006] A grinding tool for a spherical sealing gasket, including a tool body with a grinding arc surface at the lower end, and the grinding arc surface is adapted to the arc surface of the sealing gasket. It is characterized in that: a through installation hole is provided in the tool body, and a clamping handle, a steel ball, a spring, and a top column with a flange are sequentially arranged in the installation hole from top to bottom;

[0007] The upper side of the clamping handle is used for fixedly connecting with a rotating part of a machine tool, and the lower side is inserted into the installation hole and fixedly connected with the tool body;

[0008] The spring is sleeved on the top column, and its lower end abuts against the flange of the top column. The upper end of the spring abuts against the steel ball so that the steel ball contacts and abuts against the lower end of the clamping handle;

[0009] The lower part of the top column extends out of the tool body through the spring, and its flange forms a downward axial limit with the installation hole. A pressing arc surface adapted to the sealing gasket is provided at the lower end of the top column, and a pressing fit can be formed with the sealing gasket.

[0010] Further, the mounting hole is a multi-step hole with a larger upper end and a smaller lower end, including a first mating hole, a second mating hole, and a third mating hole that are connected in sequence from top to bottom;

[0011] The first mating hole is in clearance fit with the clamping handle. The grinding tool body is provided with a locking hole along the radial direction of the first mating hole and penetrating it. The clamping handle is provided with a positioning through hole corresponding to the locking hole. When the clamping handle is fitted with the first mating hole, the locking hole corresponds to the positioning through hole and a locking bolt is inserted. After being locked by a nut, a fixed connection is formed.

[0012] Further, the second mating hole is in clearance fit with the outer surface of the flange of the top post to form a sliding guide.

[0013] Further, the step surface formed at the connection of the second and third mating holes forms a downward axial limit with the flange of the top post.

[0014] Further, it further includes a fixing seat for fixing the sealing gasket. The fixing seat is provided with a counterbore hole. A positioning support is fixedly connected in the counterbore hole. The upper part of the positioning support is provided with a support part adapted to the shape of the back surface of the grinding surface of the sealing gasket. The edge of the sealing gasket is in contact fit with the edge of the counterbore of the counterbore hole.

[0015] Advantages of the present utility model:

[0016] In this solution, the grinding tool body is driven by a machine tool to rotate. The top post presses against the sealing gasket by the spring force to fix it on the fixing seat. Through the abrasive action between the sealing gasket and the grinding tool body, the grinding function of the sealing gasket is realized. Compared with the prior art, this solution omits the step of manually moving the grinding tool body, improves the operation efficiency and operation safety, and reduces the labor intensity. Description of the drawings

[0017] Figure 1 is a schematic structural diagram of a special grinding tooling in the prior art;

[0018] Figure 2 is a schematic structural diagram of a spherical sealing gasket grinding tool according to an embodiment of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the grinding tool body in an embodiment of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the fixed connection of the sealing gasket in an embodiment of the present utility model.

[0021] Description of the drawings: 1. Abrasive tool body; 11. Grinding arc surface; 12. Mounting hole; 121. First mating hole; 122. Second mating hole; 123. Third mating hole; 13. Locking hole; 2. Clamping handle; 21. Positioning through hole; 3. Steel ball; 4. Spring; 5. Ejector pin; 51. Pressing arc surface; 52. Flange; 6. Locking bolt; 7. Fixed seat; 71. Counterbore hole; 711. Counterbore; 712. Fixing hole; 8. Positioning support; 81. Support part; 82. Positioning pin; 91. Lathe spindle; 92. Positioning rod; 93. Sealing gasket; 94. Grinding body; 95. Ejector rod; 96. Live center. Detailed implementation manners

[0022] To make the present utility model more clearly understood, the following further describes a spherical sealing gasket grinding tool of the present utility model in conjunction with the drawings. The specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] As Figure 2 、 Figure 3 shown, a spherical sealing gasket grinding tool is applied to a drill press or a machine tool with a vertically downward rotating spindle. It includes a columnar abrasive tool body 1, which is made of 45# steel after quenching and tempering. A grinding arc surface 11 is provided on its lower end surface. The grinding arc surface 11 is adapted to the arc surface to be ground of the sealing gasket 93, and the symmetric center line of the grinding arc surface is collinear with the axis of the abrasive tool body 1. In this embodiment, the arc surface to be ground of the sealing gasket 93 is convex outward, and correspondingly, the grinding arc surface 11 is concave inward. A through mounting hole 12 is also provided in the abrasive tool body 1. In the mounting hole 12, a clamping handle 2, a steel ball 3, a spring 4 and an ejector pin 5 with a flange 52 are sequentially arranged from top to bottom.

[0024] Among them, the mounting hole 12 is a multi-step hole with a large upper end and a small lower end, and its axis is collinear with the axis of the abrasive tool body 1. The mounting hole 12 includes a first mating hole 121, a second mating hole 122 and a third mating hole 123 that are sequentially connected from top to bottom. The clamping handle 2 is a stepped rod, with thinner ends and a thicker middle part. The thinner upper part of the clamping handle 2 is used to fixedly connect to the rotating part of the machine tool, and the thicker part is inserted into the first mating hole 121 to form a clearance fit. The thinner lower part is inserted into the second mating hole 122, and the middle and lower step surfaces of the clamping handle 2 are in contact and pressed against the step surface at the connection of the first and second mating holes. In order to fixedly connect the clamping handle 2 and the abrasive tool body 1 to prevent loosening, a locking hole 13 that penetrates radially along the first mating hole 121 is provided on the abrasive tool body 1. A positioning through hole 21 corresponding to the locking hole 13 is provided at the thicker part of the clamping handle 2. When the clamping handle 2 and the first mating hole 121 have a clearance fit, the locking hole 13 and the positioning through hole 21 correspond to each other and a locking bolt 6 is inserted. After being locked by a nut, the abrasive tool body 1 and the clamping handle 2 form a stable fixed connection.

[0025] The steel ball 3 and the spring 4 are located within the second mating hole 122. The ejector pin 5 is a rod-shaped structure with a flange 52 in the middle. The flange is cylindrical. The upper rod body and the flange of the ejector pin 5 are located within the second mating hole 122. A clearance guiding fit is formed between the outer surface of the flange 52 and the second mating hole 122. The lower rod body of the ejector pin 5 is located within the third mating hole 123 and extends out of the grinding tool body 1. A pressing arc surface 51 adapted to the sealing gasket is provided on the end face of the outer extending rod body of the ejector pin 5.

[0026] The spring 4 is sleeved on the upper rod body of the ejector pin 5. Its lower end presses against the upper surface of the flange 52. The upper end of the spring 4 presses against the steel ball 3 so that the steel ball contacts and presses against the lower end face of the clamping handle 2. A certain moving distance is left between the upper end face of the ejector pin 5 and the steel ball 3. When the ejector pin 5 is subjected to an upward axial force, it can elastically contract. In addition, the lower surface of the flange 52 forms an axial limit with the step surface at the connection of the second and third mating holes, preventing the ejector pin 5 from disengaging from the grinding tool body 1 under the action of elasticity.

[0027] Among them, the inner diameter of the upper end of the spring is smaller than the diameter of the steel ball 3 and is in full contact with the surface of the steel ball 3 to ensure that the spring can stably support the steel ball 3. The steel ball 3 is used to contact the lower end face of the clamping handle 2 to reduce the contact area between the two, further reducing the frictional force, so that during the operation of the device, the relative rotation between the ejector pin 5 and the sealing gasket 93 is minimized, and the fixing stability of the sealing gasket 93 is improved.

[0028] As Figure 4 shown, the spherical surface sealing gasket grinding tool further includes a fixing seat 7 for fixing the sealing gasket 93. The fixing seat 7 is detachably fixed on the workbench of the machine tool. A set of counterbore holes 71 are provided on the fixing seat 7. The counterbore holes 71 have a circular counterbore 711 and a concentric fixing hole 712. A set of positioning supports 8 are provided. The positioning supports 8 include a support portion 81 adapted to the shape of the back surface of the grinding surface of the sealing gasket 93 and an integrally connected positioning pin 82. Here, the upper surface of the support portion 81 is a convex arc surface, and its lower end is a flat surface. When the positioning pin 82 is engaged with the fixing hole 712, the lower end face of the support portion 81 is in planar support contact with the counterbore 711, and a certain distance is left between the side wall of the counterbore 711 and the edge of the support portion 81. When the sealing gasket 93 is placed on the convex arc surface of the support portion 81, the edge of the sealing gasket 93 is in contact and cooperation with the side wall of the counterbore 711, enabling the sealing gasket 93 to form a stable positioning fit.

[0029] When in use, the device rotates by gripping the gripping handle 2. The sealing gasket 93 is installed on the fixed seat 7 of the machine tool workbench. Adjust the position of the fixed seat 7 so that the sealing gasket 93 is coaxial with the device. The ejector pin 5 presses against the sealing gasket 93 by the spring force to make it tightly fixed, and the positioning support 8 can prevent the sealing gasket 93 from deforming. During the grinding operation, the machine tool drives the grinding tool body 1 to rotate, so that the abrasive (grinding paste or fine sandpaper) between the sealing gasket 93 and the grinding tool body 1 generates a relative rotational displacement with the sealing gasket 93, thereby realizing the grinding function.

[0030] The utility model can realize the grinding of the gasket sealing surface of such thin-walled spherical arc surfaces, improve the operation efficiency and operation safety, and can greatly reduce the labor intensity.

[0031] The above are only the preferred embodiments of the utility model, and do not impose any form of limitation on the utility model; any person skilled in the art can, without departing from the scope of the technical solution of the utility model, make many possible changes and modifications to the technical solution of the utility model by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still fall within the scope of protection of the technical solution of the utility model.

Claims

1. A spherical sealing gasket grinding tool, comprising a grinding tool body (1) with a grinding arc surface (11) provided at the lower end, the grinding arc surface (11) being adapted to the arc surface of the sealing gasket (93), characterized in that: A through mounting hole (12) is provided in the grinding tool body (1). A clamping handle (2), a steel ball (3), a spring (4), and a flange-equipped ejector pin (5) are successively arranged in the mounting hole (12) from top to bottom; The upper side of the clamping handle (2) is used for fixedly connecting with the rotating part of the machine tool, and the lower side is inserted into the mounting hole (12) and fixedly connected with the grinding tool body (1); The spring (4) is sleeved on the ejector pin (5), and its lower end presses against the flange of the ejector pin (5). The upper end of the spring presses against the steel ball (3) so that the steel ball contacts and presses against the lower end of the clamping handle (2); The lower part of the ejector pin (5) extends out of the grinding tool body (1) through the spring, and its flange forms a downward axial limit with the mounting hole (12). A pressing arc surface (51) adapted to the sealing gasket is provided at the lower end of the ejector pin (5), and a pressing fit can be formed with the sealing gasket.

2. The spherical sealing gasket grinding tool according to claim 1, characterized in that: The mounting hole (12) is a multi-step hole with a large upper end and a small lower end, including a first mating hole (121), a second mating hole (122), and a third mating hole (123) that are successively connected from top to bottom; The first mating hole (121) has a clearance fit with the clamping handle (2). The grinding tool body (1) is provided with a locking hole (13) along the radial direction of the first mating hole (121) and penetrating it. The clamping handle (2) is provided with a positioning through hole (21) corresponding to the locking hole (13). When the clamping handle (2) is fitted with the first mating hole (121), the locking hole (13) corresponds to the positioning through hole (21) and a locking bolt (6) is inserted. After being locked by a nut, a fixed connection is formed.

3. A spherical sealing gasket grinding tool according to claim 2, characterized in that: The second mating hole (122) has a clearance fit with the outer surface of the flange of the ejector pin (5) to form a sliding guide.

4. A spherical sealing gasket grinding tool according to claim 3, characterized in that: The stepped surface formed at the connection of the second and third mating holes forms a downward axial limit with the flange of the ejector pin (5).

5. A spherical sealing gasket grinding tool according to any one of claims 1 to 4, characterized in that: It further includes a fixing seat (7) for fixing the sealing gasket (93). A counterbore hole (71) is provided on the fixing seat. A positioning support (8) is fixedly connected in the counterbore hole (71). A support portion (81) adapted to the shape of the back surface of the grinding surface of the sealing gasket (93) is provided at the upper part of the positioning support (8). The edge of the sealing gasket (93) is in contact fit with the counterbore edge of the counterbore hole (71).

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