Integrated clamp for grinding and detecting lapping surface of graphite multi-valve ring

Abstract

According to the integrated clamp for grinding and detecting the lap joint surfaces of the graphite multi-valve rings, lap joints are arranged at the two ends of each graphite ring, the integrated clamp comprises a base, a measuring piece and a fixing block, a positioning mandrel is arranged in the center area of the top face of the base, the outer ring size of the positioning mandrel is matched with the inner ring surface of the whole graphite ring, and the measuring piece is arranged on the inner ring surface of the whole graphite ring. A plane notch is formed in any diameter direction, the length of the notch is matched with the length of the fixing block, and the plane notch is used for installing the fixing block; the fixing block is used for installation of a measuring piece, the meter reading end of the measuring piece is far away from the positioning mandrel, the measuring end of the measuring piece faces the positioning mandrel and is provided with a movable meter head, and an avoiding groove is formed in the position, between the fixing block and the position adjacent to the positioning mandrel, of the base. The avoiding groove can ensure that the measuring end of the measuring piece and the positioning mandrel are in the same axial direction, so that the gauge outfit can be in contact with the lap joint, and the use efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of graphite ring auxiliary fixtures, and particularly relates to an integrated fixture for grinding and testing the overlapping surface of graphite multi-lobed rings. Background Technology

[0002] Graphite multi-lobe rings are key components in high-end sealing devices for aero-engines. The flatness, surface roughness, and fitting accuracy of their lap surfaces directly affect sealing performance, especially the butt joints or overlaps on both sides of the ring. In existing technologies, the grinding and testing processes for graphite multi-lobe rings are usually carried out in steps, requiring repeated clamping, which has the following drawbacks:

[0003] 1) Repeat positioning error: Multiple clamping can easily introduce accuracy deviations, affecting the consistency of the mating of the overlapping surfaces;

[0004] 2) Inefficiency: Traditional fixtures only support a single process (clamping or inspection), and switching equipment is time-consuming;

[0005] 3) Insufficient adaptability: Graphite is brittle, and existing rigid fixtures are prone to causing stress concentration during clamping, leading to workpiece breakage;

[0006] 4) Lagging inspection: Manual sampling cannot provide real-time feedback on grinding quality, resulting in a high scrap rate.

[0007] In summary, the grinding and detection efficiency of graphite multi-lobe rings is relatively low. Utility Model Content

[0008] In view of this, the present invention provides an integrated fixture for grinding and inspecting the overlapping surfaces of graphite multi-lobed rings, solving the technical problem of low efficiency in grinding and inspecting graphite multi-lobed rings using existing methods.

[0009] An integrated fixture is provided for grinding and inspecting the overlapping surfaces of multi-lobed graphite rings. Each lobe of the graphite ring has overlapping joints at both ends. The fixture includes a base, a measuring element, and a fixing block.

[0010] A positioning mandrel is provided in the central area of ​​the base. The outer ring size of the positioning mandrel is adapted to the inner ring face of the graphite ring, and a planar notch is provided in any diameter direction. The length of the notch is adapted to the length of the fixing block. The planar notch is used for the installation of the fixing block.

[0011] The fixing block is used for mounting the measuring component. The reading end of the measuring component is away from the positioning spindle, and the measuring end of the measuring component faces the positioning spindle and is provided with a movable meter head. The base is provided with a clearance groove between the fixing block and the adjacent positioning spindle. The clearance groove can ensure that the measuring end of the measuring component and the positioning spindle are in the same axial direction, so that the meter head can contact the lap joint.

[0012] Preferably or optionally, the measuring instrument is a dial indicator or a micrometer.

[0013] Preferably or optionally, the lap joint is configured as an L-shaped structure or a beveled structure.

[0014] Preferably or optionally, the fixing block has a fixing hole on any side and an installation hole in the central area of ​​the fixing block. The installation hole communicates with the fixing hole. The installation hole is used for the measuring end to pass through. The fixing hole can be used to fasten the measuring end of the measuring component with screws or twisted wires, which facilitates the adjustment of the initial position of the measuring component.

[0015] Preferably, or optionally, the number of graphite multi-lobe rings is 5.

[0016] Preferably or optionally, the width of the fixing block is greater than the sum of the thicknesses of the base and the positioning mandrel.

[0017] Preferably or optionally, the fixing block is configured as a cuboid structure.

[0018] The beneficial effects of this utility model are:

[0019] This structure, through the setting of the positioning mandrel, can reduce the number of clamping operations for grinding and testing of the multi-lobed ring, eliminate repeated positioning errors, eliminate the need to frequently remove the graphite multi-lobed ring, and achieve integrated and rapid grinding and testing with the cooperation of the measuring component. After grinding, the graphite multi-lobed ring is rotated so that the overlapping joint contacts the meter head. The reading of the measuring component provides feedback on whether the grinding is qualified. Then, the adjacent overlapping joints are ground and tested to ensure that the cross sections of the two adjacent overlapping joints are flush and on the same radius arc line. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the base of this utility model;

[0022] Figure 2 This is a front view of the entire fixture of this utility model;

[0023] Figure 3 This is a top view of the overall structure of this utility model;

[0024] Figure 4 This is a three-dimensional diagram of the overall structure, in which,

[0025] 1. Base; 2. Positioning mandrel; 3. Measuring component; 4. Fixing block; 5. Measuring head; 6. Part; 7. Clearance groove; 8. Twisted thread; 9. Connecting joint. Detailed Implementation

[0026] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0027] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. This utility model can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0029] like Figures 1 to 4 The integrated fixture shown is used for grinding and inspecting the overlapping surfaces of multi-lobed graphite rings. Each graphite ring has an overlapping joint 9 at both ends. Typically, five graphite rings form a single ring, which serves as part 6. It includes a base 1, a measuring element 3, and a fixing block 4. The measuring element 3, for example, is a dial indicator, micrometer, or other instrument with a movable head 5 or probe. In existing technology, the head is mounted via a spring, and the head 5 can move axially along the measuring end.

[0030] A positioning mandrel 2 is provided in the central area of ​​the base 1. The outer ring size of the positioning mandrel 2 is adapted to the inner ring surface of the graphite ring, and a planar notch is provided in any diameter direction. The length of the notch is adapted to the length of the fixing block 4. The planar notch is used for the installation of the fixing block 4.

[0031] The fixing block 4 is used for the installation of the measuring component 3. The reading end of the measuring component 3 is away from the positioning spindle 2. The measuring end of the measuring component 3 faces the positioning spindle 2 and is equipped with a movable meter head 5. The meter head 5 contacts the lap joint 9. The base 1 is provided with a clearance groove 7 between the fixing block 4 and the adjacent positioning spindle 2. The clearance groove 7 can ensure that the measuring end of the measuring component 3 and the positioning spindle 2 are in the same axial direction (the diameters of the measuring end and the positioning spindle can coincide), so that the meter head 5 can contact the lap joint 9.

[0032] When the standard-sized multi-lobed graphite rings are measured using measuring element 3, the reading is 0. Without considering tolerances, the thickness of the overlapping joints 9 of each graphite ring after initial processing is too large. After the injection process inspection, the specific deviation value can be determined according to measuring element 3. Based on this deviation value, multiple manual grindings are performed. After each grinding, the reading fed back by the meter 5 is used to determine whether the grinding is qualified. The operation is repeated to complete the inspection and grinding of all overlapping joints 9. This fixture enables grinding and inspection to be performed simultaneously, avoiding the need for existing devices to disassemble or remove each graphite ring after grinding before inspection, and repeating the grinding-removal-injection inspection process, which is time-consuming and inefficient. Similarly, it can perform secondary inspection and grinding on the outer circumference of each graphite ring, which is suitable for use in sampling inspection. This structure is mainly for integrated grinding and inspection of overlapping joints 9.

[0033] In a specific implementation, the lap joint is set with an L-shaped structure or a beveled structure. The lap joint 9 with an L-shaped structure, an arc surface structure or a beveled structure is more commonly used in existing graphite rings. It has good sealing performance. The alignment of the joint or that it is on the arc surface of the same radius can effectively avoid air or oil leakage and improve the sealing performance of the whole ring.

[0034] In a specific implementation, a fixing hole is provided on any side of the fixing block 4 and an installation hole is provided in the central area of ​​the fixing block 4. The installation hole is connected to the fixing hole. The installation hole is used for the measuring end to pass through. The fixing hole can be used to fasten the measuring end of the measuring element 3 by screws or twisted wires 8, which facilitates the adjustment of the initial position of the measuring element 3.

[0035] In a specific implementation, the width of the fixing block 4 is greater than the sum of the thicknesses of the base 1 and the positioning spindle 2. Multiple mounting holes can be set on the fixing block 4 to adapt to the detection of graphite rings with different signals. The fixing block 4 is set as a cuboid structure to realize real-time and rapid detection and feedback of the quality of the overlapping surface during the grinding process. It can be self-adaptively positioned for grinding without removal, avoiding damage when the graphite parts are frequently removed.

[0036] Working principle:

[0037] The multi-lobed ring is placed on the base, and the overlapping joints of the parts are lapped together by the positioning mandrel. The dimensions of the parts are checked while the overlap is being machined. The part dimensions are adjusted according to the allowance shown by the dial indicator on the inspection fixture. This method has the following advantages:

[0038] 1. Integrated design: Grinding and inspection are integrated, and the entire process can be completed in a single clamping, improving processing efficiency by more than 50%;

[0039] 2. Zero damage guarantee: Reduces the risk of parts being bumped or scratched due to repeated clamping.

[0040] 3. Real-time detection and control: The amount of residual material removed can be detected in real time during the grinding process, making it easier to control the dimensional accuracy.

[0041] 4. Parts Consistency: Ensure the consistency of the dimensions of parts after grinding, so that the parts pass rate is 100%.

[0042] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An integrated fixture for grinding and inspecting the overlapping surfaces of multi-lobed graphite rings, wherein each graphite ring has overlapping joints at both ends, characterized in that... Includes a base, measuring components, and a fixing block, among which, A positioning mandrel is provided in the central area of ​​the top surface of the base. The outer ring size of the positioning mandrel is adapted to the inner ring surface of the graphite ring, and a planar notch is provided in any diameter direction. The length of the notch is adapted to the length of the fixing block. The planar notch is used for the installation of the fixing block. The fixing block is used for mounting the measuring component. The reading end of the measuring component is away from the positioning spindle, and the measuring end of the measuring component faces the positioning spindle and is equipped with a movable meter head. A clearance groove is provided on the base between the fixing block and the adjacent positioning spindle. The clearance groove can ensure that the measuring end of the measuring component and the positioning spindle are in the same axial direction, so that the meter head can contact the lap joint.

2. The integrated fixture according to claim 1, characterized in that, The measuring instrument is a dial indicator or a micrometer.

3. The integrated fixture according to claim 1, characterized in that, The joint is configured as an L-shaped structure or a sloping structure.

4. The integrated fixture according to claim 1, characterized in that, The fixing block has a fixing hole on one side and an installation hole in the central area of ​​the fixing block. The installation hole communicates with the fixing hole. The installation hole is used for the measuring end to pass through. The fixing hole can be used to fasten the measuring end of the measuring component with screws or twisted wires, which facilitates the adjustment of the initial position of the measuring component.

5. The integrated fixture according to claim 1, characterized in that, The graphite has five multi-lobed rings.

6. The integrated fixture according to claim 1, characterized in that, The width of the fixing block is greater than the sum of the thicknesses of the base and the positioning mandrel.

7. The integrated fixture according to claim 6, characterized in that, The fixing block is a cuboid structure.

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