Drill jig for axial hole of inner ring of low-pressure stationary blade ring

Abstract

The utility model provides a drill jig for an inner ring axial hole of a low-pressure stationary blade ring. The drill jig comprises a drill jig positioning ring and a flat pressing plate, the side, with the groove, of the drill jig positioning ring is downwards installed to the end face of the inner ring, the drill jig positioning ring is provided with a positioning pin, and the positioning pin is connected with a pin hole in the inner ring and conducts angle positioning. The flat pressing plate is arranged at the upper end of the drill jig positioning ring, and the upper end face of the drill jig positioning ring is fastened and locked through the hexagon socket cap screws. The inner ring end face pin hole position is used for conducting pin positioning, the drill bushing is used for conducting drilling position positioning, and the radial drill conducts drilling and chambering machining on holes of the inner ring end face pin hole position. The center three-axis numerical control machining center has the advantages of being simple and convenient to install, firm in fixing, easy to machine, high in machining efficiency and the like, the problem that the productivity of the center three-axis numerical control machining center is insufficient is solved, and meanwhile machining efficiency is improved on the premise that machining precision is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the gas turbine manufacturing industry, specifically relating to a drilling jig for the axial hole of the inner ring of a low-pressure stationary blade ring. Background Technology

[0002] Gas turbines use air as a medium, drawing in air through a compressor and continuously compressing it. The compressed and gradually heated air enters the combustion chamber and mixes with fuel, causing a surge in pressure. The high-temperature, high-pressure gas is ejected from the combustion chamber, driving the compressor to continuously compress the air in a thermodynamic cycle and simultaneously powering the turbine blades. The entire process is a conversion of the thermal and potential energy of the gas (fuel) into kinetic energy. Stationary blade rings are widely used in gas turbine and aero-engine assembly. During compressor operation, they must withstand temperatures of several hundred degrees Celsius and airflow pressure. The high-temperature, highly corrosive working environment places high demands on the stationary blade rings themselves. Currently, the inner rings of low-pressure 2-7 stage stationary blade rings have numerous axial holes, requiring drilling at a three-axis CNC machining center. However, due to the limited number of machine tools and production schedules, machining efficiency is low, impacting production progress. The hole machining requirements are not particularly high; currently, an effective and simple drilling jig tooling is needed for manual radial drilling. Utility Model Content

[0003] The purpose of this invention is to provide a low-pressure stator ring inner ring axial hole drilling jig, which alleviates the pressure of insufficient production capacity of three-axis CNC machining centers and also improves processing efficiency.

[0004] A drilling jig for the axial hole of the inner ring of a low-pressure stationary vane ring includes a drilling jig positioning ring and a flat plate. The drilling jig positioning ring is installed downward on the inner ring end face with the grooved side. The drilling jig positioning ring is provided with a positioning pin, which is connected to the pin hole at the inner ring and is used for angular positioning. The flat plate is set at the upper end of the drilling jig positioning ring and is fastened and locked to the upper end face of the drilling jig positioning ring by a hexagonal head screw.

[0005] Furthermore, a Φ4.5 drill sleeve and a Φ5 drill sleeve are installed on the drill jig positioning ring.

[0006] Furthermore, the drill jig positioning ring is made of carbon structural steel Q235-B.

[0007] Furthermore, the Φ4.5 drill bushing and the Φ5 drill bushing are made of bearing steel GCr15 material.

[0008] Furthermore, the Φ4.5 and Φ5 drill bushings are subjected to heat treatment quenching, while the surfaces of the remaining parts are blackened.

[0009] The beneficial effects of this utility model are as follows: This utility model utilizes the pin hole position on the inner ring end face for pin positioning, uses a drill bushing for drilling position positioning, and a radial drill for drilling and reaming the hole. It features simple and convenient installation, firm fixing, simple processing, and high processing efficiency, alleviating the problem of insufficient production capacity of central three-axis CNC machining centers, while improving processing efficiency while ensuring processing accuracy. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the present invention;

[0011] Figure 2 Schematic diagram of the drill jig positioning ring of this utility model. Detailed Implementation

[0012] The present invention will now be further described with reference to the accompanying drawings.

[0013] A drilling jig for the axial hole of the inner ring of a low-pressure stationary vane ring includes a drilling jig positioning ring 1 and a flat plate 2. The drilling jig positioning ring 1 is installed downward on the inner ring end face with the grooved side. The drilling jig positioning ring 1 is provided with a positioning pin 3, which is connected to the pin hole at the inner ring and is used for angular positioning. The flat plate 2 is set on the upper end of the drilling jig positioning ring 1 and is fastened and locked to the upper end face of the drilling jig positioning ring 1 by hexagonal head screws. The hexagonal head screws include M10*70 hexagonal head screws 5 and M10*80 hexagonal head screws 4.

[0014] Among them, the drill jig positioning ring 1 is equipped with Φ4.5 drill sleeve 8 and Φ5 drill sleeve 9. The drill jig positioning ring 1 is made of carbon structural steel Q235-B material, and the Φ4.5 drill sleeve 8 and Φ5 drill sleeve 9 are made of bearing steel GCr15 material. The Φ4.5 drill sleeve 8 and Φ5 drill sleeve 9 are heat-treated and quenched, and the surface of the remaining parts is blackened.

[0015] The specific working process of this utility model is as follows: install the low-pressure stationary blade ring onto the corresponding assembly base and place it on the work platform; install the grooved side of the drill jig positioning ring 1 downwards onto the inner ring end face; use the positioning pin 3 to connect the pin hole at the inner ring and perform angle positioning; use the flat pressure plate 2 and the internal hexagonal head screw to fasten and lock the upper end face of the drill jig positioning ring; install the Φ4.5 drill sleeve; transport it to the radial drilling machine and use the Φ4.5 drill bit to drill holes according to the position of the drill sleeve.

[0016] After machining, remove the Φ4.5 drill bushing and install the Φ5 drill bushing. Use the Φ5 drill bit to re-enlarge the inner ring end face of the low-pressure stationary vane ring until machining is completed.

[0017] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A drilling jig for the axial hole of the inner ring of a low-pressure stationary vane ring, characterized in that, It includes a drill jig positioning ring (1) and a flat plate (2); the drill jig positioning ring (1) is installed downward on the inner ring end face with the grooved side, and the drill jig positioning ring (1) is provided with a positioning pin (3), which is connected to the pin hole at the inner ring and performs angular positioning; the flat plate (2) is set on the upper end of the drill jig positioning ring (1) and is fastened and locked to the upper end face of the drill jig positioning ring (1) by an internal hexagonal head screw.

2. The drilling jig for the axial hole of the inner ring of a low-pressure stationary blade ring according to claim 1, characterized in that, The drill jig positioning ring (1) is equipped with a Φ4.5 drill sleeve (8) and a Φ5 drill sleeve (9).

3. The drilling jig for the axial hole of the inner ring of a low-pressure stationary blade ring according to claim 1, characterized in that, The drill jig positioning ring (1) is made of carbon structural steel Q235-B.

4. The drilling jig for the axial hole of the inner ring of a low-pressure stationary blade ring according to claim 2, characterized in that, The Φ4.5 drill bushing (8) and Φ5 drill bushing (9) are made of bearing steel GCr15.

5. The drilling jig for the axial hole of the inner ring of a low-pressure stationary blade ring according to claim 2, characterized in that, The Φ4.5 drill bushing (8) and Φ5 drill bushing (9) are subjected to heat treatment and quenching, while the surfaces of the remaining parts are blackened.

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