Tool equipment and process method for nondestructive shape correction of edges of flame transfer grooves

Abstract

The invention belongs to the technical field of aero-engine repair, and particularly relates to tool equipment and a process method for nondestructive shape correction of edges of flame transfer grooves, and the tool equipment comprises a support, a pressing block and a compression screw; the support comprises a first U-shaped transverse edge, a second U-shaped transverse edge and a connecting and supporting vertical edge. Fixing bottom plates are symmetrically arranged on the first U-shaped transverse edge, and the pressing block is arranged between the first U-shaped transverse edge and the second U-shaped transverse edge and right faces the fixing bottom plates. The pressing screw penetrates through the second U-shaped transverse edge to be connected with the pressing block, and the pressing block moves along the connecting and supporting vertical edge under the action of the pressing screw. The process method comprises the following steps: 1, calculating the compression amount and the number of rotation turns; 2, clamping the flame transfer groove; 3, correcting according to the compression amount and the number of rotation turns; and 4, disassembling and assembling the flame transfer groove. According to the method, adverse effects generated in the shape correcting process of universal tools such as wrenches and pliers can be effectively avoided, the time of the shape correcting process is shortened, and the method can be popularized in repairing of parts of the same type.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft engine repair, and in particular relates to a tooling equipment and a process method for non-damage correction of the edges of a flame transfer groove. Background Art

[0002] The flame transfer groove used in aircraft engines plays the role of transferring flames and stabilizing flames. The flame transfer groove is a thin-walled structure with an overall V-shape and long edges on both sides. When the engine is ignited, the flame burns and transfers stably in the grooves on the edges on both sides. The opening size of the edges on both sides is easily deformed by force, resulting in dimensional deviation. If the opening size of the edges on both sides is large, it may cause the flame to scatter, the flame combustion intensity is reduced, and the engine performance is weakened. The traditional repair method uses tools such as wrenches or pliers to adjust the edges. The adjustment process is prone to cracks in the flame transfer groove body, wavy warping of the edges, and tearing due to force. It is also not easy to control the amount of adjustment, and it is easy to cause problems such as excess material left inside the engine. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a tooling equipment and process method for the non-damage correction of the edges of a flame transfer groove, which can effectively solve the adverse effects caused by the correction process of general tools, reduce the problems of cracks in the flame transfer groove body, wavy warping of the edges, and tearing due to force that are easily caused during the correction process, and at the same time facilitate the control of the correction amount and improve the correction efficiency.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A tooling equipment for non-damage correction of the edges of a flame transfer groove, comprising a support, a pressure block and a clamping screw; the support is in a U-shaped structure, comprising a first U-shaped horizontal side, a second U-shaped horizontal side and a connecting support vertical side; a fixed base plate is symmetrically arranged on the first U-shaped horizontal side, and the pressure block is arranged between the first U-shaped horizontal side and the second U-shaped horizontal side and directly facing the fixed base plate; the clamping screw passes through the second U-shaped horizontal side and is connected to the pressure block, and the pressure block moves along the connecting support vertical side under the action of the clamping screw, away from or close to the fixed base plate.

[0006] Furthermore, a connecting block is detachably connected to the upper surface of the pressing block, and a clamping screw connecting block with a convex groove is provided on the connecting block; a threaded hole for the clamping screw to pass through is provided on the second U-shaped horizontal edge opposite to the clamping screw connecting block, and the clamping screw is installed into the convex groove of the clamping screw connecting block through the threaded hole, and the bottom of the clamping screw is stuck in the convex groove.

[0007] Furthermore, the opposing surfaces of the pressing block and the fixed bottom plate are both provided with through-length concave ridges for locating the edge openings of the flame transfer grooves, and the two through-length concave ridges are arranged along the same vertical plane.

[0008] Furthermore, it also includes a guide screw and a strip groove arranged on the connecting support vertical edge, the guide screw passes through the pressing block, so that the head of the guide screw is fixed in the pressing block and the tail is fixed in the strip groove.

[0009] Furthermore, according to the unit compression required for the correction of the edges on both sides of the flame transfer groove, clamping screws with different thread pitches are selected. With each rotation of the thread, the edges on both sides of the flame transfer groove change by one unit compression.

[0010] Furthermore, it also includes a movable handle arranged at the end of the clamping screw.

[0011] Furthermore, the connecting block and the pressing block are fixed by cylindrical head screws.

[0012] Furthermore, a copper sheet with a smooth surface is attached to the through-length concave edge; and the length of the pressing block is smaller than the length of the edge of the flame transfer groove.

[0013] Furthermore, the support is integrally formed.

[0014] A process for non-damage shaping of the edges of a flame transfer groove, using any of the above-mentioned tooling equipment for non-damage shaping of the edges of a flame transfer groove, comprises the following steps:

[0015] Step 1: Determine the target size, measure the opening size of the edges on both sides of the flame transfer groove that needs to be calibrated, and calculate the compression amount and the number of turns required for the compression screw according to the target size;

[0016] Step 2: Fit the edges on both sides of the flame transfer groove to the through-length concave edges of the pressing block and the fixed bottom plate respectively to position the flame transfer groove;

[0017] Step 3: Rotate the compression screw clockwise to the required number of turns, then measure the compression amount to obtain the target size;

[0018] Step 4: Rotate the compression screw counterclockwise, remove the flame transfer groove, and the calibration is completed.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention uses the matching pressing block and the fixed bottom plate on the support to adjust the edges of the flame transfer groove at one time, thereby avoiding the wavy warping of the edges caused by segmented adjustment;

[0021] 2. By tightening the compression screws, the force is applied evenly and controllably, and the whole is compressed slowly to avoid cracks in the machine body during the correction process;

[0022] 3. By controlling the thread of the compression screw and thus the amount of compression, the size of the shape can be more accurately grasped. With a reliable measurement position, each measurement is made at the same designated measurement position, which can measure the shape size more accurately.

[0023] 4. The integrated design of the tooling equipment of the present invention has only one component, which prevents the excess objects from falling into the flame transmission groove and causing secondary damage, damaging the flame transmission groove or requiring re-adjustment;

[0024] 5. The present invention has been proven to be able to effectively solve the adverse effects of general tools such as wrenches and pliers during the calibration process through internal practical application, and to shorten the original calibration process from 30 minutes to 10 minutes. It is worth promoting in the repair of similar machine parts in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a tooling equipment for correcting the shape of the edges of a flame transfer groove without causing damage to the edges of the flame transfer groove according to the present invention;

[0026] Figure 2 It is a front view of a tooling equipment for correcting the shape of the flame transfer groove edge without damage according to the present invention;

[0027] Figure 3 for Figure 2 Cross-sectional view along AA direction;

[0028] Among them, 1. Fixed bottom plate; 2. Pressure block; 3. Guide screw; 4. Connection block; 5. Cylindrical head screw; 6. Movable handle; 7. Clamping screw connection block 8. Flame transfer groove; 9. Clamping screw; 10. Support; 11. Strip groove; 12. Convex groove; DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0031] In order to solve the problems existing in the prior art, such as Figure 1-3As shown, this embodiment discloses a tooling equipment for non-damaging shape correction of the edges of the flame transfer groove, including a support 10, a pressure block 2, a connecting block 4 and a clamping screw 9; the support 10 is a U-shaped structure, and in this embodiment, an integral molding arrangement is adopted, including a first U-shaped horizontal side, a second U-shaped horizontal side and a connecting support vertical side; a fixed bottom plate 1 is symmetrically arranged on the first U-shaped horizontal side, and the pressure block 2 is arranged between the first U-shaped horizontal side and the second U-shaped horizontal side and directly facing the fixed bottom plate 1; the pressure block 2 can move along the connecting support vertical side, away from or close to the fixed bottom plate 1, and the pressure block 2, through movement, jointly applies a force with the fixed bottom plate 1 on the support 10 to the edge opening of the flame transfer groove 8 to correct it. The upper surface of the pressure block 2 is fixedly connected to the connecting block 4 by a cylindrical head screw 5, and the connecting block 4 is used to connect the clamping screw 9 and the pressure block 2, and at the same time plays a transmission role. The connecting block 4 is provided with a clamping screw connecting block 7 with a convex groove 12; the second U-shaped horizontal side is provided with a threaded hole for the clamping screw 9 to pass through, and the clamping screw 9 is installed into the convex groove 12 of the clamping screw connecting block 7 through the threaded hole, and the bottom of the clamping screw 9 is just stuck in the convex groove 12, so as to realize the connection between the clamping screw 9 and the pressing block 2, and the angle between the pressing block 2 and the clamping screw 9 can be adjusted within a certain range. When the edge openings on both sides of the shaped object after the required correction are not parallel to each other, the correction can also be performed through this tooling equipment. This tooling equipment applies a clamping force to the pressing block 2 by screwing in the clamping screw 9, so that it is jointly applied to the edge opening of the flame transmission groove 8 to correct it; in addition, because the clamping screw 9 is connected to the pressing block 2 through the clamping screw connecting block 7 on the connecting block 4, when it is necessary to put in flame transmission grooves 8 of different specifications, by adjusting the distance between the clamping screw 9 and the pressing block 2, correction objects of different specifications can be corrected. The opposing surfaces of the pressing block 2 and the fixed bottom plate 1 are both provided with a through-length concave ridge for positioning the edge opening of the flame transmission groove 8, and the two through-length concave ridges are arranged along the same vertical plane. When the edge of the flame transmission groove 8 needs to be shaped, it is only necessary to fit the edge opening of the flame transmission groove 8 to the through-length concave ridges to achieve positioning and perform subsequent shaping. In this embodiment, the support 10 serves as the overall frame of the tooling equipment, and is used to fix the clamping screws 9, the connecting block 4, the pressing block 2, the fixed bottom plate 1 and other components.

[0032] As a preferred embodiment, the equipment also includes a guide screw 3 and a strip groove 11 provided on the vertical side of the connecting support; the guide screw 3 passes through the pressure block 2, so that the head of the guide screw 3 is fixed in the pressure block 2, and the tail is fixed in the strip groove 11; to enhance the use stability of the entire tooling equipment, when the tooling equipment is installing the flame transfer groove 8, the tail of the guide screw 3 can be separated from the strip groove 11, and after determining the installation position, the tail of the guide screw 3 is fixed in the strip groove 11, and in the process of applying a clamping force to the flame transfer groove 8, it plays a role in stabilizing the pressure block 2.

[0033] As a preferred embodiment, the distance between adjacent threads on the clamping screw 9 is 0.6 mm. With each rotation of the thread, the unit compression of the edges on both sides of the flame transfer groove 8 changes by 0.6 mm, thereby achieving precise control of the compression amount of the flame transfer groove 8 for shape correction. When other compression amounts need to be set, the unit compression amount can be controlled by selecting clamping screws 9 with different thread spacings.

[0034] As a preferred embodiment, the equipment also includes a movable handle 6 arranged at the end of the clamping screw 9; while facilitating operation, by controlling the rotation speed of the movable handle 6, the clamping speed can be controlled to achieve precise control of the shape correction amount of the flame transfer groove 8.

[0035] As a preferred embodiment, the through-length concave edge is affixed with a smooth copper sheet to avoid abnormal deformation of the edge during the calibration process, thereby improving the calibration accuracy; the length of the pressing block is 5mm-20mm shorter than the length of the edge of the flame transfer groove, so that a portion of the edge of the flame transfer groove is exposed from the tooling equipment, which makes it convenient to use a vernier caliper to measure the actual opening size of the part at a position 5mm longer than the edges on both sides of the flame transfer groove during the clamping process; at the same time, since the length of the exposed edge of the flame transfer groove is short, the entire edge of the flame transfer groove can be calibrated through one calibration.

[0036] The above-mentioned tooling equipment is used to carry out a process method for correcting the edge of the flame transfer groove without damage, and the specific steps are as follows:

[0037] Step 1: Calculate the compression and number of rotations

[0038] Determine the target size, measure the opening size of the edges on both sides of the flame transfer groove 8 that needs to be calibrated, and calculate the compression amount and the number of turns required for the compression screw 9 according to the target size;

[0039] For example, in this embodiment, the opening size of the edges of the flame transmission groove 8 on both sides needs to be 33 mm, and needs to be calibrated to 25 mm. It can be calculated that the number of turns of the clamping screw 9 required is (33-25) / 0.6≈13 turns;

[0040] Step 2: Clamp the flame transmission slot 8

[0041] Clamp the flame transmission groove 8, fit the edges on both sides of the flame transmission groove 8 to the through-length concave edges of the pressing block 2 and the fixed bottom plate 1 respectively, and position the flame transmission groove; at the same time, adjust the guide screw 3 to fix the guide screw 3 in the strip groove 11; prevent the sudden burst of other directional forces during operation from causing damage to the flame transmission groove 8, damaging the flame transmission groove 8 or requiring re-calibration;

[0042] Step 3: Calibrate according to the amount of compression and number of rotations

[0043] Rotate the compression screw 9 clockwise to the required number of turns, then measure the compression amount to obtain the target size;

[0044] After the flame transmission groove 8 is clamped, the movable handle 6 installed at the end of the clamping screw 9 is rotated clockwise evenly and slowly, thereby driving the clamping screw 9 to rotate. At this time, the pressure block 2 pushes the edge of one side of the flame transmission groove 8 to move toward the fixed bottom plate 1 for shape correction; after rotating 13 times, use a vernier caliper to measure the opening size of the edges on both sides of the flame transmission groove 8 to obtain the target size;

[0045] Step 4: Disassembly and assembly of flame transmission slot 8

[0046] After the flame transmission groove 8 obtains the target size, the movable handle 6 at the end of the clamping screw 9 is rotated counterclockwise so that the clamping screw 9 drives the pressing block 2 to separate from the flame transmission groove 8, and the flame transmission groove 8 is taken out, and the shape correction is completed.

Claims

1. A tooling equipment for correcting the shape of flame transfer groove edges without damage, characterized in that: It includes a support, a pressure block and a clamping screw; the support is in a U-shaped structure, including a first U-shaped horizontal side, a second U-shaped horizontal side and a connecting support vertical side; a fixed base plate is symmetrically arranged on the first U-shaped horizontal side, and the pressure block is arranged between the first U-shaped horizontal side and the second U-shaped horizontal side and directly facing the fixed base plate; the clamping screw passes through the second U-shaped horizontal side and is connected to the pressure block, and the pressure block moves along the connecting support vertical side under the action of the clamping screw, away from or close to the fixed base plate.

2. The tooling equipment for correcting the shape of the flame transfer groove without damaging the edge of the flame transfer groove according to claim 1, characterized in that: A connecting block is detachably connected to the upper surface of the pressing block, and a clamping screw connecting block with a convex groove is provided on the connecting block; a threaded hole for the clamping screw to pass through is provided on the second U-shaped horizontal edge opposite to the clamping screw connecting block, and the clamping screw is installed into the convex groove of the clamping screw connecting block through the threaded hole, and the bottom of the clamping screw is stuck in the convex groove.

3. The tooling equipment for correcting the shape of the flame transfer groove without damaging the edge of the flame transfer groove according to claim 1, characterized in that: The opposite surfaces of the pressing block and the fixed bottom plate are both provided with through-length concave ridges for locating the edge openings of the flame transfer grooves, and the two through-length concave ridges are arranged along the same vertical plane.

4. The tooling equipment for correcting the shape of the flame transfer groove without damaging the edge of the flame transfer groove according to claim 1, characterized in that: It also includes a guide screw and a strip groove arranged on the connecting support vertical edge. The guide screw passes through the pressing block so that the head of the guide screw is fixed in the pressing block and the tail is fixed in the strip groove.

5. The tooling equipment for correcting the shape of the flame transfer groove without damaging the edge of the flame transfer groove according to claim 2, characterized in that: According to the unit compression required for the correction of the edges on both sides of the flame transfer groove, clamping screws with different thread pitches are selected. With each rotation of the thread, the edges on both sides of the flame transfer groove change by one unit compression.

6. The tooling equipment for correcting the shape of the flame transfer groove without damaging the edge of the flame transfer groove according to claim 1, characterized in that: It also includes a movable handle arranged at the end of the compression screw.

7. The tooling equipment for correcting the shape of the flame transfer groove without damaging the edge of the flame transfer groove according to claim 2, characterized in that: The connecting block and the pressing block are fixed by cylindrical head screws.

8. The tooling equipment for correcting the shape of the flame transfer groove without damaging the edge of the flame transfer groove according to claim 3, characterized in that: The concave edges are covered with a copper sheet with a smooth surface; the length of the pressing block is smaller than the edge length of the flame transfer groove.

9. The tooling equipment for correcting the shape of the flame transfer groove without damaging the edge of the flame transfer groove according to claim 1, characterized in that: The support is integrally formed.

10. A process for non-damage shaping of the edges of a flame transfer groove, using the tooling equipment for non-damage shaping of the edges of a flame transfer groove as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Determine the target size, measure the opening size of the edges on both sides of the flame transfer groove that needs to be calibrated, and calculate the compression amount and the number of turns required for the compression screw according to the target size; Step 2: Fit the edges on both sides of the flame transfer groove to the through-length concave edges of the pressing block and the fixed bottom plate respectively to position the flame transfer groove; Step 3: Rotate the compression screw clockwise to the required number of turns, then measure the compression amount to obtain the target size; Step 4: Rotate the compression screw counterclockwise, remove the flame transfer groove, and the calibration is completed.

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