Machining method of sealing ring

Abstract

The invention discloses a machining method of a sealing ring. The machining method comprises the following steps: 1) roughly turning a sealing ring blank; 2) linearly cutting the two semi-rings; 3) removing the remelting layer; 4) assembling the two semi-rings together to form an intermediate product; (5) the inner circumference of the intermediate product is finely turned into a circle, and one end face of the intermediate product is finely turned; (6) the intermediate product is clamped with the inner circumference and the end face subjected to finish turning as the benchmark, and the outer spherical surface and the other end face of the intermediate product are subjected to finish turning; and (7) linear cutting is conducted, then the remelting layer is removed, and the sealing ring is obtained. According to the machining method, the matching property of the two semi-rings of the sealing ring is ensured, the high-precision machining requirement of parts is met, and the machining quality of the sealing ring is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of parts processing, and in particular to a processing method of a sealing ring. Background Art

[0002] In the field of parts processing technology, many parts are formed by machining. Some of these parts require precision or special structures, and conventional machining cannot guarantee the processing quality. Figure 1-Figure 3 The sealing ring shown is designed as a complete set of two matching halves. The tolerance on the outer spherical surface after mating is only 0.03mm, the thickness tolerance on both end faces is only 0.02mm, the flatness and parallelism requirements on both end faces are 0.03mm, and a gap of no more than 0.03mm is permitted on the step at the mating point. Due to the high design requirements, machining is very challenging.

[0003] If the two half rings are processed separately, the compatibility will be poor, and it will be difficult to ensure the outer spherical surface tolerance of 0.03mm and the flatness and parallelism of the two end surfaces; if the whole ring is divided into two parts after processing, the wire cutting will consume some material during the division process, which will cause the step gap at the matching part to be too large, and the outer spherical surface tolerance of 0.03mm will also be difficult to ensure. Summary of the Invention

[0004] In view of the above defects or deficiencies in the prior art, it is desired to provide a method for processing a sealing ring, which ensures the compatibility of the two half rings of the sealing ring, meets the high-precision processing requirements of the parts, and ensures the processing quality of the sealing ring.

[0005] The present invention provides a method for processing a sealing ring, comprising the following steps:

[0006] 1) Rough turn the sealing ring blank and reserve machining allowance, where the reserved allowance on the inner circumference of the sealing ring blank is used as a process table;

[0007] 2) Use wire cutting to split the sealing ring blank into two half rings, and cut the butt joint of the two half rings into a step portion according to the design requirements;

[0008] 3) Remove the remelted layer left by wire cutting on the step part;

[0009] 4) Butting the stepped portions of the two half rings together, and fixing the process table inside the stepped portions, thereby assembling the two half rings together to form an intermediate product;

[0010] 5) Retain the process table to finish turning the inner periphery of the intermediate product into a circle, and finish turning one end face of the intermediate product;

[0011] 6) Clamp the intermediate product based on the inner circumference and end face after fine turning, and fine turn the outer spherical surface and the other end face of the intermediate product;

[0012] 7) Use wire cutting to remove the process table, and then remove the remelting layer formed by wire cutting to obtain a sealing ring.

[0013] Furthermore, in the step 1), the bar material is fixed and clamped, and one end thereof is rough-turned and then cut off to obtain a sealing ring blank.

[0014] Furthermore, in steps 2) and 7), the wire cutting is performed by medium wire cutting or slow wire cutting.

[0015] Furthermore, in step 4), tapping or drilling is performed on the butted process tables, and the butted process tables are fixed by screwing or riveting, thereby assembling the two half rings together.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The machining method of the present invention first rough-turns a complete sealing ring blank, then splits it into two half-rings. The remelted layer is then removed from the stepped portion of the two half-rings before they are tightly butted together, ensuring the compatibility of the two halves. The two halves are then secured on a process table, and then finish-turned to initially define some of the sealing ring's structural features. These features are then used as a foundation for finish-turning the remaining structural features, meeting the high-precision machining requirements of the part and ensuring the processing quality of the sealing ring.

[0018] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0020] Figure 1 It is a schematic diagram of the main structure of the sealing ring;

[0021] Figure 2 Schematic diagram of the top view of the sealing ring;

[0022] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at P1 in the middle;

[0023] Figure 4 It is a structural schematic diagram of a sealing ring blank;

[0024] Figure 5 This is a schematic diagram of the structure of the sealing ring blank after wire cutting;

[0025] Figure 6 for Figure 5 Schematic diagram of the structure at P2;

[0026] Figure 7 It is a schematic diagram of the main structure of the intermediate product;

[0027] Figure 8 It is a schematic diagram of the top view of the intermediate product;

[0028] Figure 9 for Figure 7 Schematic diagram of the structure at P3;

[0029] Figure 10 This is a schematic diagram of the structure of the intermediate product after the first finishing process;

[0030] Figure 11 for Figure 10 Schematic diagram of the cross-sectional structure at AA in the middle;

[0031] Figure 12 This is a schematic diagram of the structure of the intermediate product after the second finishing process;

[0032] Figure 13 Schematic diagram of the structure after removing the process table for the intermediate product.

[0033] Numbers in the figure: 1, sealing ring; 2, bar stock; 3, sealing ring blank; 4, intermediate product;

[0034] 11. Half ring; 12. Step part;

[0035] 31. Craft table. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0037] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] Please refer to Figures 1 to 13 , an embodiment of the present invention provides a method for processing a sealing ring, comprising the following steps:

[0039] 1) If Figure 4 As shown, the bar material 2 is fixed and clamped, and one end thereof is rough-turned and then cut off to obtain a sealing ring blank 3. A machining margin is reserved for the sealing ring blank 3, wherein the reserved margin on the inner circumference of the sealing ring blank 3 serves as a process table 31;

[0040] 2) If Figure 5 and Figure 6 As shown, the sealing ring blank 3 is divided into two half rings 11 by wire cutting with medium wire or slow wire, and the butt joint of the two half rings 11 is cut into a step portion 12 according to the design requirements;

[0041] 3) removing the remelted layer left by the wire cutting of the step portion 12;

[0042] 4) If Figures 7 to 9 As shown, the step portions 12 of the two half rings 11 are tightly butted together, the process table 31 inside the step portion 12 is tapped or drilled, and the butted process table 31 is fixed by screwing or riveting, thereby assembling the two half rings 11 together to form the intermediate product 4;

[0043] 5) If Figure 10 and Figure 11 As shown, the process table 31 is retained to finish-turn the inner periphery of the intermediate product 4 into a circle, and to finish-turn one end face of the intermediate product 4;

[0044] Since some material is consumed during the wire cutting of the sealing ring blank 3, the inner hole becomes elliptical after the re-matching; therefore, the inner hole is fine-turned into a circle without removing the process table 31 to serve as the reference surface for the next process;

[0045] 6) If Figure 12 As shown, the intermediate product 4 is clamped based on the inner circumference and end surface after fine turning, and the outer spherical surface and the other end surface of the intermediate product 4 are fine turned;

[0046] 7) If Figure 13 As shown, the process table is removed by wire cutting with medium or slow wire cutting, and then the remelted layer formed by wire cutting is removed to obtain a seal, 1.

[0047] In this embodiment, Figure 1-Figure 3 When machining the sealing ring 1 shown, a complete sealing ring blank 3 is first rough-turned with a machining allowance, and then the blank is split into two half-rings 11. The remelted layer is then removed from the stepped portions 12 of the two half-rings 11 and the two half-rings 11 are butted together to ensure compatibility between the two half-rings 11 of the sealing ring 1.

[0048] Then, the two half rings 11 are fixed at the process table 31, and some structural features of the sealing ring 1 are first processed by precision turning, and then the remaining structural features are precision turned based on these structural features, which meets the high-precision processing requirements of the sealing ring 1 and ensures the processing quality of the sealing ring 1.

[0049] Throughout this specification, terms such as "one embodiment" or "some embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0050] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for processing a sealing ring, characterized in that: The steps include: 1) Rough turn the sealing ring blank and reserve machining allowance, where the reserved allowance on the inner circumference of the sealing ring blank is used as a process table; 2) Use wire cutting to split the sealing ring blank into two half rings, and cut the butt joint of the two half rings into a step portion according to the design requirements; 3) Remove the remelted layer left by wire cutting on the step part; 4) Butting the stepped portions of the two half rings together, and fixing the process table inside the stepped portions, thereby assembling the two half rings together to form an intermediate product; 5) Retain the process table to finish turning the inner periphery of the intermediate product into a circle, and finish turning one end face of the intermediate product; 6) Clamp the intermediate product based on the inner circumference and end face after fine turning, and fine turn the outer spherical surface and the other end face of the intermediate product; 7) Use wire cutting to remove the process table, and then remove the remelting layer formed by wire cutting to obtain a sealing ring.

2. The method for processing a sealing ring according to claim 1, characterized in that: In the step 1), the bar material is fixed and clamped, and one end thereof is rough-turned and then cut off to obtain a sealing ring blank.

3. The method for processing a sealing ring according to claim 1, characterized in that: In the steps 2) and 7), the wire cutting is performed by using medium wire cutting or slow wire cutting.

4. The method for processing a sealing ring according to claim 1, characterized in that: In the step 4), tapping or drilling is performed on the butted process tables, and the butted process tables are fixed by screwing or riveting, thereby assembling the two half rings together.

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