An outer circle grinding tool for sealing ring

Abstract

The utility model discloses a kind of outer circle grinding frocks for sealing ring, including mandrel body, the mandrel body outer wall is equipped with partition ring, the both sides of partition ring are provided with sealing ring body, the outer wall of sealing ring body is equipped with outer ring holder, outer ring holder is by hinge, arm and bolt combination composition, the both sides of mandrel body are provided with first pressing plate and second pressing plate respectively, recess is opened in the outer wall of first pressing plate, first pressing plate and second pressing plate structure are same, first pressing plate and second pressing plate are respectively closely adhered in the outer wall of sealing ring body, the side of first pressing plate and second pressing plate is provided with first washer and second washer respectively, second washer side view is "C" shape structure, first washer and second washer structure are same, mandrel body side is connected with shoulder nut. The device reduces sealing ring body positioning error, avoids the phenomenon that sealing ring body clamping deformation appears, improves the stability of sealing ring body, improves the machining precision of sealing ring body.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring processing technology, specifically to a tooling for external cylindrical grinding of sealing rings. Background Technology

[0002] As a crucial component of mechanical seals in engine exhaust systems and power compartment hydraulic systems, sealing rings largely determine the performance and lifespan of these seals, and are in high demand. Therefore, the choice of machining methods and equipment to ensure machining accuracy, thereby guaranteeing the overall performance stability of the exhaust and hydraulic systems, is paramount. A sealing ring is a notched annular seal placed within the groove of a sleeve. As the sleeve rotates with the shaft, the sealing ring, through its elasticity after being compressed, presses against the inner wall of the stationary component to achieve a seal.

[0003] After the outer diameter of the sealing ring is ground, it is necessary to ensure that the sealing ring installed in the hole of the mating plate can be installed in a manner that ensures the gap at the joint is within the range of 0.45 to 0.75 mm. At the same time, the fit between the sealing ring and the hole surface should not exceed 0.1 mm, and the length should not exceed 1 / 5 of the circumference. However, the sealing ring is deformed after multiple machining processes (turning the outer diameter and inner hole, wire cutting the opening, grinding the plane, outer diameter, and inner hole) and heat treatment (quenching) processes, which reduces the machining accuracy and requires improvement. Utility Model Content

[0004] The purpose of this invention is to provide a grinding fixture for the outer diameter of a sealing ring, so as to solve the problem mentioned in the background art that the sealing ring is prone to deformation and reduced accuracy after multiple processing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a grinding fixture for an outer cylindrical sealing ring, comprising a mandrel body, a spacer ring sleeved on the outer wall of the mandrel body, sealing ring bodies on both sides of the spacer ring, a first pressure plate and a second pressure plate respectively on both sides of the mandrel body, the first pressure plate and the second pressure plate respectively fitting against the outer wall of the sealing ring body, a first washer and a second washer respectively on one side of the first pressure plate and the second pressure plate, and a shoulder nut connected to one side of the mandrel body.

[0006] Preferably, the outer wall of the first pressure plate is provided with a groove, and the first pressure plate and the second pressure plate have the same structure.

[0007] Preferably, the second washer has a "C" shaped structure when viewed from the side, and the first washer has the same structure as the second washer.

[0008] Preferably, the outer wall of the sealing ring is fitted with an outer ring clamp, which is composed of a hinge, a clamping arm, and bolts.

[0009] Preferably, the outer ring of the spacer ring is provided with a protruding structure, and the spacer ring, the first pressure plate, the second pressure plate, the first washer and the second washer are all slidably connected to the first pressure plate.

[0010] Preferably, the mandrel body has a triangular structure at its center to facilitate the disassembly of the sealing ring.

[0011] Preferably, the outer ring clamp is used to control the width of the sealing ring body slit within a specified range.

[0012] Compared with the prior art, the beneficial effects of this utility model are: (1) This device reduces the positioning error of the sealing ring body, avoids the phenomenon of deformation of the sealing ring body during clamping, and improves the stability and processing accuracy of the sealing ring body.

[0013] (2) This device uses spacers on the outer wall of the mandrel to separate the sealing rings, so that the sealing rings can be fixed in batches at both ends of the mandrel while dispersing the clamping pressure and avoiding clamping deformation. At the same time, the first and second pressure plates on both sides of the sealing rings can improve the stability of the sealing rings and make the sealing rings more uniformly stressed, thereby improving stability and facilitating subsequent processing.

[0014] (3) This device can improve the processing accuracy of the sealing ring by setting an outer ring clamp on the outer wall of the sealing ring body. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an external cylindrical grinding fixture for a sealing ring according to the present invention; Figure 2 This is a center sectional view of the spindle body of a cylindrical grinding fixture for sealing rings according to this utility model; Figure 3 This is a top view of the outer ring clamp of a sealing ring grinding fixture according to the present invention; Figure 4 This is a cross-sectional view of the first pressure plate of the external cylindrical grinding fixture for a sealing ring according to this utility model; Figure 5 This is a cross-sectional view of the spacer ring of the sealing ring external cylindrical grinding fixture of this utility model; Figure 6 This is a side view of the second washer of the sealing ring grinding fixture of this utility model.

[0016] In the diagram: 1. Mandrel body; 2. First washer; 3. First pressure plate; 4. Sealing ring body; 5. Spacer ring; 6. Second pressure plate; 7. Second washer; 8. Shoulder nut; 9. Outer ring clamp. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-6This utility model provides a technical solution: a grinding fixture for outer cylindrical sealing rings, including a mandrel body 1, a spacer ring 5 sleeved on the outer wall of the mandrel body 1, sealing ring bodies 4 on both sides of the spacer ring 5, and an outer ring clamping device 9 sleeved on the outer wall of the sealing ring body 4. The outer ring clamping device 9 is composed of a hinge, a clamping arm, and bolts. This structure allows the clamping arm to be rotated by the hinge, so that the clamping arm can fit against the outer wall of the sealing ring body 4, thereby facilitating the control of the cut width of the sealing ring body 4. The outer ring of the spacer ring 5 has a protruding structure. The spacer ring 5, the first pressure plate 3, the second pressure plate 6, the first washer 2, and the second washer 7 are all slidably connected to the first pressure plate 3. This structure can separate the sealing ring bodies 4 in the middle through the spacer ring 5, which can reduce the... The pressing force generated by the stacking of small sealing rings 4 increases the number of sealing rings 4 without causing excessive pressure on them, ensuring processing efficiency while avoiding damage. The mandrel 1 has a triangular center for easy disassembly of the sealing rings 4. The outer wall of the mandrel 1 is cylindrical, similar to the traditional mandrel 1. The outer ring clamp 9 controls the slit width of the sealing ring 4 within a specified range. This structure allows the slit width of the sealing ring 4 to be within 11±3mm, thus preventing deformation and improving processing accuracy. The mandrel 1 has a second clamp on each side. The first pressure plate 3 and the second pressure plate 6 are arranged in a groove on their outer wall. The first pressure plate 3 and the second pressure plate 6 have the same structure. This structure uses the first pressure plate 3 and the second pressure plate 6 to fix the sealing ring 4 at both ends of the mandrel body 1, thus ensuring uniform force distribution on the sealing ring 4 and preventing deformation during grinding. The first pressure plate 3 and the second pressure plate 6 are tightly fitted to the outer wall of the sealing ring 4. A first washer 2 and a second washer 7 are respectively provided on one side of the first pressure plate 3 and the second pressure plate 6. The second washer 7 has a "C" shaped structure when viewed from the side. The first washer 2 and the second washer 7 have the same structure. This structure, by setting the first washer 2 and the second washer 7, can prevent deformation during grinding. When the first pressure plate 3 and the second pressure plate 6 come into contact, wear occurs between them. A shoulder nut 8 is connected to one side of the spindle body 1. The shoulder nut 8 of this device is used for locking, which can eliminate the thread clearance and the cumulative positioning error of the first pressure plate 3 and the second pressure plate 6. That is to say, it can greatly reduce the clamping deformation caused by the combination and clamping of the sealing ring body 4 and the spindle body 1. The locking force acts perpendicularly on the cylindrical surface of the sealing ring body 4, so that the contact surface between the first pressure plate 3 and the second pressure plate 6 and the sealing ring body 4 is well positioned. When processing this device, a diamond grinding wheel is used, and the runout of the sealing ring body 4 is aligned within 0.1 mm using a dial indicator. The external cylindrical grinding machine is started, and the feed rate is 0.01 to 0.0.02mm, adjust the equipment while feeding the tool, measure the dimensions of the sealing ring 4 until it meets the requirements of the drawing. After the sealing ring 4 is machined, remove it for inspection. The following points should be noted during machining: 1. Before installing the external cylindrical grinding fixture on the sealing ring 4, clean the mandrel 1, clean the center holes at both ends, and apply lubricating oil. 2. The sealing ring 4 must be cleaned before use. 3. During the precision grinding of the sealing ring 4, the feed rate per cycle should not exceed 0.02mm. 4. During the grinding of the outer diameter, frequently dress the grinding wheel and ensure sufficient coolant. 5. External cylindrical grinding of the sealing ring is a precision machining process; do not apply excessive force when clamping the mandrel 1; tighten only until secure, otherwise the shoulder nut 8 will lose its adjusting function. 6. After use, apply oil for rust prevention when using the external cylindrical grinding fixture, return it to the fixture library, and ensure the fixture is in good condition.

[0019] Working principle: When using this external cylindrical grinding fixture for sealing rings, first mount the sealing ring body 4 on the spindle body 1, separated by a spacer ring 5. Use the outer ring clamping fixture 9 to make the slit width of the sealing ring body 4 within the range of 11±3mm, and clamp a total of 15 pieces. Then, install the first pressure plate 3 and the second pressure plate 6, and then install the first washer 2 and the second washer 7. Then tighten the shoulder nut 8 and press the parts on the table. Put one end of the integral spindle body 1 with a clamp between the two centers of the external cylindrical grinding machine, and then you can start machining. After machining is completed, reverse the above steps to disassemble the machined sealing ring body 4.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A grinding fixture for an outer cylindrical part of a sealing ring, comprising a mandrel (1), characterized in that: The outer wall of the mandrel body (1) is fitted with a spacer ring (5), and sealing ring bodies (4) are provided on both sides of the spacer ring (5). A first pressure plate (3) and a second pressure plate (6) are respectively provided on both sides of the mandrel body (1). The first pressure plate (3) and the second pressure plate (6) are respectively attached to the outer wall of the sealing ring body (4). A first washer (2) and a second washer (7) are respectively provided on one side of the first pressure plate (3) and the second pressure plate (6). A shoulder nut (8) is connected to one side of the mandrel body (1).

2. The external cylindrical grinding fixture for a sealing ring according to claim 1, characterized in that: The outer wall of the first pressure plate (3) is provided with a groove, and the first pressure plate (3) and the second pressure plate (6) have the same structure.

3. The external cylindrical grinding fixture for a sealing ring according to claim 1, characterized in that: The second washer (7) has a "C" shaped structure when viewed from the side, and the first washer (2) has the same structure as the second washer (7).

4. The external cylindrical grinding fixture for a sealing ring according to claim 1, characterized in that: The outer wall of the sealing ring (4) is fitted with an outer ring clamp (9), which is composed of a hinge, a clamp arm and bolts.

5. The external cylindrical grinding fixture for a sealing ring according to claim 1, characterized in that: The outer ring of the spacer (5) is provided with a protruding structure. The spacer (5), the first pressure plate (3), the second pressure plate (6), the first washer (2) and the second washer (7) are all slidably connected to the first pressure plate (3).

6. The external cylindrical grinding fixture for a sealing ring according to claim 1, characterized in that: The mandrel body (1) has a triangular structure at its center to facilitate the disassembly of the sealing ring body (4).

7. The external cylindrical grinding fixture for a sealing ring according to claim 4, characterized in that: The outer ring clamp (9) is used to control the width of the ring cut of the sealing ring body (4) within the specified range.

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