Grinding process of combined sealing ring

Abstract

The invention provides a grinding process for a combined sealing ring, and relates to the technical field of machining processes. The inner ring is sequentially subjected to rough turning, rough grinding, external grinding, finish turning, first-time milling and second-time milling, the inner ring is segmented through the first-time milling, a groove is machined in the inner ring through the second-time milling, the outer ring is sequentially subjected to rough turning, rough grinding, external grinding and grinding, and finally the inner ring and the outer ring are combined and ground together after being combined. The inner ring and the outer ring are subjected to primary grinding and then sectioned, then the inner ring and the outer ring are combined to a plurality of tools to be integrally fixed, and then the combined sealing ring is integrally ground, so that the flatness, the parallelism and the thickness are consistent, the sealing performance of the whole graphite ring is improved, the static leakage rate dwell time reaches 100 s or above, and the sealing performance is improved. And guarantee is provided for use safety of the engine.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing technology, and in particular to a grinding process for a combined sealing ring. Background Art

[0002] Combined seal is a commonly used sealing form in engines. Combined sealing ring is a common sealing component in engines. Combined sealing ring includes an inner ring and an outer ring, and the inner ring and the outer ring include multiple petals. The combined sealing ring grinding in the prior art usually adopts single-petal single-side grinding and then assembles. After assembly, the overall combined sealing ring has obvious consistency defects in flatness and parallelism. Under an air pressure of 0.04MPa, the static leakage rate pressure holding time is short, and it is difficult to stably reach the time requirement of not less than 20s. Summary of the invention

[0003] The purpose of the present invention is to propose a grinding process for a combined sealing ring, aiming to solve the problems of obvious consistency defects in flatness and parallelism of the combined sealing ring in the prior art and short pressure holding time of static leakage rate.

[0004] The present invention provides a grinding process for a combined sealing ring, wherein the combined sealing ring comprises an inner ring and an outer ring, and comprises the following steps:

[0005] Steps for grinding the inner ring:

[0006] The inner ring is subjected to rough turning, rough grinding, external grinding, fine turning, first milling and second milling in sequence. The first milling separates the inner ring into petals, and the second milling processes the grooves on the inner ring.

[0007] Steps for grinding the outer ring:

[0008] The outer ring is subjected to rough turning, rough grinding, external grinding and grinding in sequence, and the number of petals of the outer ring is the same as the number of petals of the inner ring, and the petals of the outer ring and the inner ring are matched;

[0009] Steps for grinding after combining the inner and outer rings:

[0010] Assemble the inner ring and the outer ring, and grind them together after assembling.

[0011] Preferably, the rough turning of the inner ring includes rough turning the inner ring and outer ring of the inner ring, and cutting the length of the inner ring according to the drawing size, and the rough turning of the outer ring includes rough turning the inner ring and outer ring of the outer ring, and cutting the length of the outer ring according to the drawing size.

[0012] Preferably, the rough grinding of the inner ring includes rough grinding of two planes of the inner ring to ensure the parallelism of the two planes of the inner ring; and the rough grinding of the outer ring includes rough grinding of two planes of the outer ring to ensure the parallelism of the two planes of the outer ring.

[0013] Preferably, the outer grinding of the inner ring includes grinding the outer diameter of the inner ring to the drawing size using a tooling grinder.

[0014] Preferably, the finish turning of the inner ring includes finish turning the inner ring and the inner platform of the inner ring, and leaving a preset scraping margin.

[0015] Preferably, the second milling includes using a milling cutter to mill an inner R groove on the inner ring of the inner ring according to the drawing, and to mill an annular groove on the outer ring of the inner ring according to the drawing.

[0016] Preferably, the first milling includes evenly dividing the inner ring into six petals using a milling cutter.

[0017] Preferably, the outer ring is evenly divided into six petals using a grinding wheel on a tool grinder.

[0018] Preferably, the grinding of the outer ring includes grinding the inner ring of the outer ring to the drawing size.

[0019] Preferably, the inner ring and the outer ring are combined, and grinding together after the combination specifically includes:

[0020] Place the inner rings in order on the outer ring of the first tooling, the outer ring of the first tooling and the inner ring of the inner ring;

[0021] Place the outer rings in order on the outer rings of the inner rings;

[0022] Use a clamp to assemble the spring to the outer ring of the outer ring;

[0023] Assemble the second tooling on the outer ring of the spring;

[0024] Put the assembled whole into the inner ring of the third tooling;

[0025] The third tooling after overall assembly is placed on the grinding disc under the double-sided grinder for grinding.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention performs preliminary grinding on the inner ring and the outer ring, and then separates them into petals, and then combines them onto multiple tooling to achieve overall fixation, and then grinds the combined sealing ring as a whole to make the flatness, parallelism and thickness dimensions consistent, thereby improving the sealing performance of the graphite whole ring, and the static leakage rate pressure holding time reaches more than 100s, providing protection for the safety of engine use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 A flow chart of a grinding process of a combined sealing ring according to an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of fine grinding the outer ring of an inner ring using a tooling grinder according to an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of any one of the six petals of an inner ring evenly divided by a milling cutter according to an embodiment of the present invention;

[0032] Figure 4 An inner ring having an inner R groove milled on the inner ring and an annular groove milled on the outer ring according to an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of any one of the six-petal outer rings of a tooling abrasive tool according to an embodiment of the present invention;

[0034] Figure 6 It is a longitudinal cross-sectional schematic diagram of an assembly diagram after the inner rings are placed in order on the first tooling according to one embodiment of the present invention;

[0035] Figure 7 It is a cross-sectional schematic diagram of an assembly diagram after the inner rings are placed in order on the first tooling according to one embodiment of the present invention;

[0036] Figure 8 It is a longitudinal cross-sectional schematic diagram of an assembly diagram after the outer rings are placed on the outer rings of the inner rings in sequence according to the sequence numbers according to one embodiment of the present invention;

[0037] Fig. 9 It is a longitudinal cross-sectional schematic diagram of an assembly diagram after the outer rings are placed on the outer rings of the inner rings in sequence according to the sequence numbers according to one embodiment of the present invention;

[0038] Fig.10 A longitudinal cross-sectional schematic diagram of an assembly diagram after a spring is assembled with a clamp according to an embodiment of the present invention;

[0039] Fig.11 A schematic cross-sectional view of an assembly diagram of a spring after being assembled with a clamp according to an embodiment of the present invention;

[0040] Fig.12 A longitudinal cross-sectional schematic diagram of an assembly diagram after the second tool is assembled on the outer ring of the spring according to one embodiment of the present invention;

[0041] Fig.13 A cross-sectional schematic diagram of an assembly diagram after the second tool is assembled on the outer ring of the spring according to one embodiment of the present invention;

[0042] Fig.14 This is a cross-sectional schematic diagram of an assembly diagram after the assembled inner and outer rings are placed as a whole into the third tooling according to an embodiment of the present invention;

[0043] Fig.15 This is a schematic diagram of placing the assembled third tooling on the grinding disc under the double-sided grinder according to an embodiment of the present invention.

[0044] In the figure, 1-tooling and grinding tool, 2-product, 3-pressing plate, 4-nut, 5-R groove, 6-annular groove, 7-inner ring, 8-outer ring, 9-first tooling, 10-second tooling, 11-third tooling, 12-spring, 13-upper grinding disc, 14-lower grinding disc.

[0045] Among them, XX1(inner), XX2(inner), XX3(inner), XX4(inner), XX5(inner), and XX6(inner) are the six petals of the inner ring, and XX1(outer), XX2(outer), XX3(outer), XX4(outer), XX5(outer), and XX6(outer) are the six petals of the outer ring. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0047] The present invention provides a grinding process for a combined sealing ring, wherein the combined sealing ring comprises an inner ring 7 and an outer ring 8, and comprises the following steps:

[0048] Steps for grinding the inner ring 7:

[0049] The inner ring 7 is subjected to rough turning, rough grinding, external grinding, fine turning, first milling and second milling in sequence. The first milling divides the inner ring 7 into petals, and the second milling processes a groove on the inner ring 7.

[0050] Steps for grinding the outer ring 8:

[0051] The outer ring 8 is subjected to rough turning, rough grinding, external grinding, and grinding in sequence, so that the number of petals of the outer ring 8 is the same as the number of petals of the inner ring 7, and the petals of the outer ring 8 match those of the inner ring 7;

[0052] Steps for grinding after combining the inner ring 7 and the outer ring 8:

[0053] The inner ring 7 and the outer ring 8 are assembled and then ground together.

[0054] According to a specific embodiment of the present invention, the rough turning of the inner ring 7 includes rough turning the inner ring and the outer ring of the inner ring 7, and cutting the length of the inner ring 7 according to the drawing size, and the rough turning of the outer ring 8 includes rough turning the inner ring and the outer ring of the outer ring 8, and cutting the length of the outer ring 8 according to the drawing size.

[0055] According to a specific embodiment of the present invention, the rough grinding of the inner ring 7 includes rough grinding of two planes of the inner ring 7 to ensure the parallelism of the two planes of the inner ring 7; the rough grinding of the outer ring 8 includes rough grinding of two planes of the outer ring 8 to ensure the parallelism of the two planes of the outer ring 8.

[0056] According to a specific embodiment of the present invention, the outer grinding of the inner ring 7 includes grinding the outer diameter of the inner ring 7 to the size shown in the drawing using a tooling grinder 1 .

[0057] According to a specific embodiment of the present invention, the finishing turning of the inner ring 7 includes finishing the inner circle and the inner platform of the inner ring 7, and leaving a preset scraping margin.

[0058] According to a specific embodiment of the present invention, the second milling includes using a milling cutter to mill out an inner R groove 5 on the inner ring of the inner ring 7 according to the drawing, and milling out an annular groove 6 on the outer ring of the inner ring 7 according to the drawing. The R groove 5 and the annular groove 6 play an air film protection role. The surface of the R groove 5 is a non-sealing surface, and the non-sealing surface is not shown in the assembly drawing.

[0059] According to a specific embodiment of the present invention, the first milling includes evenly dividing the inner ring 7 into six petals using a milling cutter.

[0060] According to a specific embodiment of the present invention, the outer ring 8 is evenly divided into six petals by a grinding wheel on a tool grinder. The outer ring 8 has a large gap, so it is divided into six petals by a grinding wheel.

[0061] According to a specific embodiment of the present invention, the grinding of the outer ring 8 includes grinding the inner ring of the outer ring 8 to the drawing size.

[0062] According to a specific embodiment of the present invention, the inner ring 7 and the outer ring 8 are combined, and grinding together after the combination specifically includes:

[0063] Place the inner rings 7 in order on the outer ring of the first tooling 9, the outer ring of the first tooling 9 and the inner ring of the inner ring 7;

[0064] Place the outer ring 8 in order on the outer ring of the inner ring 7;

[0065] Use a clamp to assemble the spring 12 to the outer ring of the outer ring 8;

[0066] Assemble the second tool 10 on the outer ring of the spring 12;

[0067] Put the assembled whole into the inner ring of the third tooling 11;

[0068] The third tooling 11 after overall assembly is placed on the grinding disc under the double-sided grinding machine for grinding.

[0069] Example 1

[0070] The present invention provides a grinding process for a combined sealing ring, wherein the combined sealing ring comprises an inner ring 7 and an outer ring 8, and comprises the following steps:

[0071] Pick materials according to the design standards and grade performance of the inner ring 7 and outer ring 8;

[0072] Steps for grinding the inner ring 7:

[0073] The inner ring 7 is subjected to rough turning, rough grinding, external grinding, fine turning, first milling and second milling in sequence. The first milling divides the inner ring 7 into petals, and the second milling processes a groove on the inner ring 7.

[0074] Steps for grinding the outer ring 8:

[0075] The outer ring 8 is subjected to rough turning, rough grinding, external grinding, and grinding in sequence, so that the number of petals of the outer ring 8 is the same as the number of petals of the inner ring 7, and the petals of the outer ring 8 match those of the inner ring 7;

[0076] Steps for grinding after combining the inner ring 7 and the outer ring 8:

[0077] The inner ring 7 and the outer ring 8 are assembled and then ground together.

[0078] Example 2

[0079] The present invention provides a grinding process for a combined sealing ring, wherein the combined sealing ring comprises an inner ring 7 and an outer ring 8, and comprises the following steps:

[0080] The inner ring 7 is subjected to rough turning, rough grinding, external grinding, fine turning, first milling and second milling in sequence. The first milling divides the inner ring 7 into petals, and the second milling processes a groove on the inner ring 7. Specifically, it includes:

[0081] Rough turning the inner and outer rings of the inner ring 7, and cutting the length of the inner ring 7 according to the size of the drawing;

[0082] The rough grinding of the inner ring 7 includes rough grinding of two planes of the inner ring 7 to ensure the parallelism of the two planes of the inner ring 7;

[0083] The outer grinding of the inner ring 7 includes grinding the outer diameter of the inner ring 7 to the drawing size using the tooling grinder 1;

[0084] The finishing turning of the inner ring 7 includes finishing the inner ring and the inner platform of the inner ring 7, and leaving a preset scraping margin;

[0085] The first milling includes using a milling blade to evenly divide the inner ring 7 into six petals;

[0086] The second milling includes using a milling cutter to mill out an inner R groove 5 on the inner ring of the inner ring 7 according to the drawing, and to mill out an annular groove 6 on the outer ring of the inner ring 7 according to the drawing.

[0087] The outer ring 8 is subjected to rough turning, rough grinding, external grinding, and grinding in sequence, and the number of petals of the outer ring 8 is the same as the number of petals of the inner ring 7, and the petals of the outer ring 8 match those of the inner ring 7; specifically, the steps include:

[0088] The rough turning of the outer ring 8 includes rough turning the inner ring and the outer ring of the outer ring 8, and cutting the length of the outer ring 8 according to the size of the drawing;

[0089] The rough grinding of the outer ring 8 includes rough grinding of two planes of the outer ring 8 to ensure the parallelism of the two planes of the outer ring 8;

[0090] Use a grinding wheel on a tool grinder to divide the outer ring 8 into six petals;

[0091] The grinding of the outer ring 8 includes grinding the inner ring of the outer ring 8 to the drawing size.

[0092] The inner ring 7 and the outer ring 8 are combined and ground together, specifically including:

[0093] Place the inner rings 7 in order on the outer ring of the first tooling 9, the outer ring of the first tooling 9 and the inner ring of the inner ring 7;

[0094] Place the outer ring 8 in order on the outer ring of the inner ring 7;

[0095] Use a clamp to assemble the spring 12 to the outer ring of the outer ring 8;

[0096] Assemble the second tool 10 on the outer ring of the spring 12;

[0097] Put the assembled whole into the inner ring of the third tooling 11;

[0098] The third tooling 11 after overall assembly is placed on the grinding disc under the double-sided grinding machine for grinding.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A grinding process for a combined sealing ring, the combined sealing ring comprising an inner ring and an outer ring, characterized in that: The steps include: Steps for grinding the inner ring: The inner ring is subjected to rough turning, rough grinding, external grinding, fine turning, first milling and second milling in sequence. The first milling separates the inner ring into petals, and the second milling processes the grooves on the inner ring. Steps for grinding the outer ring: The outer ring is subjected to rough turning, rough grinding, external grinding, and grinding in sequence, and the number of petals of the outer ring is the same as the number of petals of the inner ring, and the petals of the outer ring and the inner ring are matched; Steps for grinding after combining the inner and outer rings: Assemble the inner ring and the outer ring, and grind them together after assembling.

2. The grinding process of the combined sealing ring according to claim 1, characterized in that: The rough turning of the inner ring includes rough turning the inner ring and outer ring of the inner ring, and cutting the length of the inner ring according to the drawing size. The rough turning of the outer ring includes rough turning the inner ring and outer ring of the outer ring, and cutting the length of the outer ring according to the drawing size.

3. The grinding process of the combined sealing ring according to claim 1, characterized in that: The rough grinding of the inner ring includes rough grinding of the two planes of the inner ring to ensure the parallelism of the two planes of the inner ring; the rough grinding of the outer ring includes rough grinding of the two planes of the outer ring to ensure the parallelism of the two planes of the outer ring.

4. The grinding process of the combined sealing ring according to claim 1, characterized in that: External grinding of the inner ring includes grinding the outer diameter of the inner ring to the drawing size using a tooling grinder.

5. The grinding process of the combined sealing ring according to claim 1, characterized in that: The finishing of the inner ring includes finishing the inner ring and the inner platform of the inner ring, and leaving a preset scraping allowance.

6. The grinding process of the combined sealing ring according to claim 1, characterized in that: The second milling includes using a milling cutter to mill out an inner R groove and an annular groove on the inner ring of the inner ring according to the drawing.

7. The grinding process of the combined sealing ring according to claim 1, characterized in that: The first milling includes evenly dividing the inner ring into six petals using a milling cutter.

8. The grinding process of the combined sealing ring according to claim 7, characterized in that: Use a grinding wheel on a tool grinder to divide the outer ring into six equal parts.

9. The grinding process of the combined sealing ring according to claim 1, characterized in that: Grinding of the outer ring includes grinding the inner ring of the outer ring to the drawing size.

10. The grinding process of the combined sealing ring according to claim 1, characterized in that: The inner ring and the outer ring are combined and ground together, specifically including: Place the inner rings in order on the outer ring of the first tooling, the outer ring of the first tooling and the inner ring of the inner ring; Place the outer rings in order on the outer rings of the inner rings; Use a clamp to assemble the spring to the outer ring of the outer ring; Assemble the second tooling on the outer ring of the spring; Put the assembled whole into the inner ring of the third tooling; The third tooling after overall assembly is placed on the grinding disc under the double-sided grinder for grinding.

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