Clamping tool for casing inner sleeve

Abstract

The utility model discloses a cartridge receiver inner sleeve clamping tool which comprises a fixing disc, a clamping piece and a clamping piece. The fixing disc is provided with a connecting structure connected with a working table of machining equipment. The positioning pieces are used for being detachably connected into holes in the lower end face of the to-be-machined casing inner sleeve, and all the positioning pieces are arranged on the same circumference; and the at least two shape adjusting assemblies are arranged on the fixed disc and used for applying outward acting force to the inner diameter face of the machining area of the inner casing sleeve to be machined. The tool is adopted to assist in replacement of the flow guide ring, alignment of the inner sleeve of the casing is facilitated, and the flow guide ring can be machined conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of the replacement of the guide ring inside the casing, and particularly relates to a clamping tool for the inner casing of an engine to assist in the replacement of the guide ring. Background Art

[0002] After the inner casing of an aero-engine has been in service, cracks will occur in the guide ring inside the casing, affecting the performance of the engine. It is necessary to replace the guide ring to meet the engine performance. In the existing process of replacing the guide ring, the inner casing of the engine is first installed on the workbench of the processing equipment, and then tool setting machining is carried out.

[0003] When machining the guide ring inside the in-service inner casing of the engine by the existing method, the following prominent problems exist:

[0004] (1) When the inner casing of the engine is placed on the processing equipment for machining, it is necessary to clamp and align the inner casing of the engine. This process is cumbersome, inefficient, and the labor intensity of the operator is relatively large.

[0005] (2) Affected by high temperature and high pressure during the use of the inner casing of the engine, irregular deformation will occur in the part itself, and it is impossible to machine the guide ring according to the standard size during machining, and the machining difficulty is relatively large. Summary of the Utility Model

[0006] In order to solve the problems that it is troublesome to align the inner casing of the engine and it is not convenient to machine the guide ring in the existing method, the utility model provides a clamping tool for the inner casing of the engine, which is easy to align the inner casing of the engine and convenient to machine the guide ring.

[0007] The purpose of the utility model is realized by the following technical solutions:

[0008] The utility model discloses a clamping tool for the inner casing of the engine, including:

[0009] A fixed disk, on which a connection structure for connecting with the workbench of the processing equipment is arranged;

[0010] At least two positioning members, which are used for detachably connecting to the holes on the lower end surface of the inner casing of the engine to be machined, and all the positioning members are arranged on a circumference;

[0011] At least two shape adjusting components, which are arranged on the fixed disk and used for applying an outward acting force to the inner diameter surface of the machining area of the inner casing of the engine to be machined.

[0012] Compared with the prior art, the utility model has at least the following advantages and beneficial effects:

[0013] 1. The clamping tooling of the present utility model realizes the fixation with the lower end holes of the inner sleeve of the casing to be machined by arranging a plurality of positioning members on the fixed disk on the same circumference, and can realize the rapid alignment of the inner sleeve of the casing.

[0014] 2. The present utility model arranges a shape-adjusting component on the fixed disk to apply an outward acting force to the inner diameter surface of the machining area of the inner sleeve of the casing to be machined for shape correction, reduce the amount of deformation, and facilitate the machining of the guide ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of the clamping tooling for the inner sleeve of the casing of the present utility model;

[0017] Figure 2 It is an assembly drawing of the clamping tooling for the inner sleeve of the casing of the present utility model and the inner sleeve of the casing;

[0018] Figure 3 It is a schematic structural diagram of a pressure rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0021] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0022] It should be noted that like reference numerals and letters denote like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The present utility model discloses a clamping tooling set inside a casing for assisting in replacing a flow guiding ring. Specifically, as Figure 1 shown, the clamping tooling set inside the casing includes a fixed disk, at least two positioning members, a crimping assembly, and at least two shape adjusting assemblies.

[0026] Among them, the fixed disk is used to fixedly support the positioning members, the crimping assembly, and the shape adjusting assemblies, and a connection structure for connecting with the workbench of the processing equipment is provided on the fixed disk. The positioning members are used for detachably connecting to the holes on the lower end surface of the inner casing 4 to be processed, and all the positioning members are arranged on a circumference and correspond to the holes on the lower end surface of the inner casing 4 to be processed to achieve accurate positioning of the inner casing of the casing.

[0027] The crimping assembly includes a support rod 31 and a crimping part 32. One end of the support rod 31 is fixed on the fixed disk 1 and the other end is detachably connected to the crimping part 32. The crimping part 32 includes a connecting piece 321 provided with a mounting hole 324 and at least two pressing rods 322 evenly arranged around the mounting hole and connected to the connecting piece 321. The connecting piece 321 is detachably connected to the end of the support rod 31 through the mounting hole and bolts. To ensure structural stability, the connecting piece 321 and the pressing rods 322 are preferably of an integral structure. One end of the pressing rod 322 is provided with a step structure 323 that crimps the upper end face of the inner sleeve of the casing to be processed and at the same time abuts against the inner diameter of the upper end face of the inner sleeve of the casing to be processed. The center of the circle where the positioning member is located is placed on the axis of the mounting hole. The crimping assembly realizes crimping from the upper end face of the inner sleeve of the casing to be processed, applies a downward pressing force to the inner sleeve of the casing to be processed, so that the inner sleeve of the casing to be processed does not loosen during the processing, and improves the processing quality.

[0028] The shape adjustment assembly is arranged on the fixed disk 1 and is used to apply an outward acting force to the inner diameter surface of the processing area of the inner sleeve of the casing to be processed, so as to adjust the shape of the deformed area to reduce the amount of deformation during processing, facilitate the processing of the flow guiding ring in the processing area, and improve the processing quality.

[0029] With the above clamping tooling, the positioning member realizes the rapid positioning and alignment of the inner sleeve of the casing to be processed, the crimping assembly realizes the crimping of the inner sleeve of the casing to be processed, and the shape adjustment assembly corrects the shape of the inner sleeve of the casing to be processed, improving the processing quality of replacing the flow guiding ring of the inner sleeve of the casing to be processed.

[0030] Based on the above principle, the number of pressing rods 322 can be 2, 3, 4 or even more. To improve the stability of the crimping of the inner sleeve of the casing to be processed, as Figure 3 shown, there are 4 pressing rods 322 and they are respectively placed on two perpendicular straight lines.

[0031] There are various ways to implement the positioning member. For example, there are two positioning rods with different diameters. The diameter of the upper section is smaller than that of the lower section, and the upper positioning rod is placed in the hole on the lower end face of the inner sleeve 4 of the casing to be processed. However, with this structure, the hole needs to be aligned with the upper positioning rod during installation, which is not convenient for installation. In this regard, the positioning member preferably includes a support column 21 and a bolt 22 for being placed in the hole and connected to the support column.

[0032] There are various ways to implement the structure of the fixed disk. For example, a disk structure is adopted. However, since the fixed disk is made of metal, its mass is relatively heavy. In this regard, to reduce the mass of the fixed disk, facilitate operation and reduce the manufacturing cost, the fixed disk includes a fixed ring 11 and connecting strips 12 connected to the fixed ring 11. The connecting structure is a connecting hole 13, and the connecting hole 13 is arranged on the connecting strip 12.

[0033] In order to improve the alignment between the axis of the inner sleeve of the casing to be machined in the fixed disk after it is installed on the workbench of the processing equipment and the center of the workbench of the processing equipment, there are 4 connecting bars 12, and the 4 connecting bars 12 are respectively placed on two straight lines, and the intersection point of the two straight lines and the axis of the mounting hole 324 are on the same straight line.

[0034] In order to facilitate the fixing of the fixed disk on the workbench of the processing equipment, the connecting hole 13 is an oblong hole.

[0035] In order to further reduce the weight of the fixed disk, the fixing ring 11 is provided with a weight-reducing hole 14. The number and setting position of the weight-reducing holes 14 are based on the premise of ensuring the structural stability of the fixed disk.

[0036] The shape-adjusting assembly includes a support member 51 fixed on the fixed disk, an adjusting cylinder 52 fixed on the support member 51, a slider 53 partially placed in the adjusting cylinder 52, an adjusting screw threadedly connected with the slider 53 in the adjusting cylinder, and an operating part 54 placed at one end of the adjusting cylinder 52 and fixedly connected with the adjusting screw.

[0037] The adjusting screw is threadedly connected with the slider. Under the limiting action of the adjusting cylinder, rotating the operating part drives the adjusting screw to rotate, so as to drive the slider to retract or extend relative to the adjusting cylinder, and further control the abutting situation between the slider 53 and the inner diameter surface of the processing area of the inner sleeve of the casing to be machined.

[0038] With the above-mentioned structure of the shape-adjusting assembly, by rotating the operating part, the distance between the slider and the support member can be adjusted, so as to realize the adjustment of the magnitude of the acting force applied to the inner diameter surface of the processing area of the inner sleeve of the casing to be machined. The structure is simple, the operation is convenient, and it is easy to adjust.

[0039] Further, in order to improve the fitting degree with the inner diameter surface of the processing area of the inner sleeve of the casing to be machined, the included angle between the end face of the end of the slider 53 placed outside the adjusting cylinder 52 and the disk surface of the fixed disk is 56°.

[0040] Based on the above-mentioned clamping tooling for the inner sleeve of the casing, the method for removing the flow guiding ring of the inner sleeve of the casing includes steps S01 to S06.

[0041] Step S01: Place the clamping tooling for the inner sleeve of the casing with any of the above structures at the center of the workbench of the processing equipment.

[0042] Exemplarily, first place the clamping tooling for the inner sleeve of the casing as shown in Figure 1 on the workbench of the processing equipment. Through the oblong holes on the 4 connecting bars 12, it can be fixed on the workbench of the processing equipment by using bolts, and the center of the workbench of the processing equipment can be aligned with the center of the clamping tooling for the inner sleeve of the casing.

[0043] Step S02: Place the inner sleeve of the casing to be machined on the casing inner sleeve clamping fixture for positioning, alignment, and shape correction.

[0044] The operation process of this step is as follows: First, place the inner sleeve of the casing to be machined on the clamping fixture, and use bolts to fix the holes on the lower end face of the inner sleeve 4 of the casing to be machined to the positioning parts, achieving accurate positioning of the inner sleeve of the casing. Then, place the crimping assembly on the upper end face of the inner sleeve of the casing to be machined so that the stepped structures 323 of the pressure rods 322 are crimped to the upper end face of the inner sleeve of the casing to be machined, and the state is as Figure 2 shown. Next, adjust the shape adjustment assembly to apply a force from the inside to the outside on the machining area of the inner sleeve of the casing to be machined for shape correction to reduce the deformation amount of the machining area.

[0045] Step S03: Determine the maximum outer diameter of the inner sleeve of the casing to be machined and use the maximum outer diameter as the starting point for testing. While controlling the rotation of the fixed disk, measure the outer diameter data of the entire circumference of the inner sleeve of the casing to be machined.

[0046] In this step, a dial indicator can be used to find the position of the maximum outer diameter of the inner sleeve of the casing.

[0047] When measuring the outer diameter, use the maximum outer diameter as the starting point for testing to measure the outer diameter data of the entire 360° circumference.

[0048] Step S04: Set up the coordinate system of the inner sleeve of the casing to be machined. The zero points in the X and Y directions of the coordinate system are the centers of the mounting holes 324, and the zero point in the Z direction is the upper end face of the inner sleeve of the casing to be machined.

[0049] That is, set the origin of the coordinate system at the center of the plane where the upper end face of the inner sleeve of the casing to be machined is located.

[0050] Step S05: Segment the outer diameter data of the entire circumference of the inner sleeve of the casing to be machined, calculate the outer diameter change amount of each segment, and set the angle value of the tool according to the outer diameter change amount.

[0051] In this step, by using the method of segmentally setting the angle value of the tool, the machining path is made to conform to the actual change of the guide ring of the inner sleeve of the casing, realizing precise machining of the guide ring.

[0052] Step S06: After tool setting, machine the guide ring of the inner sleeve of the casing until the machining is completed.

[0053] In this step, an existing spherical milling cutter can be used for machining. However, since the material of the guide ring is superalloy, which has the characteristics of high strength and good toughness and belongs to difficult-to-machine materials, there are some problems when using the existing spherical milling cutter for machining and removal, such as being easily damaged, having poor machining quality, and low efficiency. In response to this, a hard alloy ball blade with a coating can be used in this step, and the coating is TiAlN.

[0054] Due to the use of a cemented carbide ball blade with a coating, the surface roughness of the inner sleeve of the casing after machining is improved, the machining quality is enhanced, the tool change frequency is reduced, and the machining efficiency is improved.

[0055] The method of this solution is used to remove the guide ring of the inner sleeve of the casing. It obtains effective machining data according to the actual deformation of the part, fits the deformation of the part through the machining program, realizes the complete matching of the machining path and the area to be machined, and achieves precise machining of the deformed part.

[0056] Although the present utility model 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A clamping tool for a receiver, characterized in that: include: A fixed plate, on which a connection structure connected to a working table of a processing equipment is provided; At least two positioning members, the positioning members being used to be detachably connected to holes on the lower end surface of the inner sleeve (4) of the casing to be processed, and all the positioning members being arranged on a circumference; At least two shape-adjusting components are provided on the fixed plate (1) and are used to apply an outward force to the inner diameter surface of the inner sleeve processing area to be processed.

2. The inner clamping tool of the receiver according to claim 1, characterized in that: The invention also comprises a crimping assembly, the crimping assembly comprising a support rod (31) having one end fixed to the fixed plate (1) and a crimping portion (32) detachably connected to the other end of the support rod (31), the crimping portion (32) comprising a connecting piece (321) provided with a mounting hole (324) and at least two crimping rods (322) evenly arranged around the mounting hole and connected to the connecting piece (321).

3. The inner clamping tool of the receiver according to claim 2, characterized in that: There are four pressure rods (322) which are respectively placed on two vertical straight lines.

4. The inner clamping tool of the receiver according to claim 1, characterized in that: The positioning member comprises a support column (21) and a bolt (22) which is placed in a hole and connected to the support column.

5. The inner clamping tool of the receiver according to claim 2, characterized in that: The fixing plate comprises a fixing ring (11) and a connecting strip (12) connected to the fixing ring (11); the connecting structure is a connecting hole (13); and the connecting hole (13) is arranged on the connecting strip (12).

6. The inner clamping tool of the receiver according to claim 5, characterized in that: The connecting hole (13) is a waist-shaped hole.

7. The inner clamping tool of the receiver according to claim 5, characterized in that: The fixing ring (11) is provided with a weight-reducing hole (14).

8. The inner clamping tool of the receiver according to claim 5, characterized in that: There are four connecting bars (12), and the four connecting bars (12) are respectively placed on two straight lines, and the intersection of the two straight lines and the axis of the mounting hole (324) are placed on the same straight line.

9. The inner clamping tool of the receiver according to claim 1, characterized in that: The shape adjustment component comprises a support member (51) fixed on the fixed plate, an adjustment cylinder (52) fixed on the support member (51), a slider (53) partially disposed in the adjustment cylinder (52), an adjustment screw disposed in the adjustment cylinder and threadedly connected to the slider (53), and an operating portion (54) disposed at one end of the adjustment cylinder (52) and fixedly connected to the adjustment screw.

10. The inner clamping tool of the receiver according to claim 9, characterized in that: The included angle between the end surface of the sliding block (53) at one end outside the adjusting cylinder (52) and the disk surface of the fixed disk is 56°.

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