Quick-change fixture for processing of a turbine engine guide vane

Abstract

This invention relates to a quick-change fixture for machining guide vanes of turbojet engines, and pertains to the field of positioning device technology. It includes a support platform with a rotatable support seat on the platform. A vertically arranged connecting column is detachably connected to the support seat, and a fixed support seat is fixedly connected through the connecting column. A movable support seat slides above the fixed support seat. A clamping sleeve swings about a horizontal line on the support platform, and a dial indicator is detachably connected inside the clamping sleeve. The clamping sleeve also moves vertically up and down. This invention solves the problem in traditional technologies where the guide vane requires separate measurement or machining of its upper and lower end faces, necessitating disassembly and re-clamping of the guide vane, thus increasing clamping time and reducing machining efficiency.

Description

Technical Field

[0001] This utility model relates to the field of positioning device technology, specifically to a quick-change fixture for machining the guide of a turbojet engine. Background Technology

[0002] In the field of gas turbine engines, turbine guide vanes are one of the main components forming the airflow channel. Turbine guide vanes are a type of thin-walled casting that requires high precision in the overall runout of the machined end face relative to the blades. Furthermore, the blades are prone to defects under stress during machining, making the alignment of turbine guide vane blades technically challenging. Currently, turbine guide vane machining typically employs a method of clamping the workpiece with a chuck or pressing the end face against the workpiece and then aligning the runout of each blade individually. This method is not only inefficient but also prone to damaging the blade body under stress.

[0003] A prior art patent with publication number CN216464212U discloses a solution comprising: a stud bottom fixedly connected to a base via a set pin; an adjusting seat installed at the lower part of the stud; a fixed plate fixedly connected to the base via a fixing screw and a threaded hole; a positioning plate and the adjusting seat integrally driven; a clamping nut pressing the pressure cap onto the workpiece; a support seat fitted into the positioning hole; and a tightening nut threadedly driven by the support seat to tighten and support the lower end face of the workpiece. This solution solves the tedious datum alignment problem in machining turbine guide vanes, saving alignment time for mass production and thus improving production efficiency. It is a reasonably designed and flexible alignment machining fixture.

[0004] The shortcomings of existing technology have gradually become apparent with use, mainly in the following aspects:

[0005] Because the guide needs to be fixed with a fixture during processing, and because the upper and lower end faces of the guide need to be measured or processed separately, the guide needs to be disassembled, changed, and re-clamped, which increases the clamping time and reduces processing efficiency.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a quick-change fixture for machining guides of turbojet engines. This solves the problem that in traditional technologies, the upper and lower end faces of the guide need to be measured or machined separately during machining, which requires disassembling and re-clamping the guide, thus increasing clamping time and reducing machining efficiency.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A quick-change fixture for machining the guide vane of a turbojet engine includes a support platform. A support seat is rotatably mounted on the support platform. A vertically arranged connecting column is detachably connected to the support seat. A fixed support seat is fixedly connected through the connecting column. A movable support seat is slidably mounted above the fixed support seat.

[0010] The support platform is equipped with a clamping sleeve that swings around the horizontal line as the center of rotation. A dial indicator is detachably connected inside the clamping sleeve, and the clamping sleeve is also vertically adjustable.

[0011] As an optimized solution, a rectangular tube is vertically fixed to the support platform, and a rectangular column is slidably inserted into the rectangular tube along the vertical direction. The clamping sleeve is oscillatingly mounted on the rectangular column through a swinging structure.

[0012] As an optimized solution, the swing structure includes a support sleeve rotatably mounted on the side wall of the rectangular column, a sliding rod slidably disposed inside the support sleeve, and a clamping sleeve fixedly connected to one end of the sliding rod.

[0013] As an optimized solution, the rectangular column has a horizontally opened fixing hole, a screw is inserted into the fixing hole, the outer wall of the shank end of the screw is fixedly connected to the outer wall of the support sleeve, and the end of the screw is threadedly connected to a nut that abuts against the rectangular column.

[0014] As an optimized solution, an angle positioning protrusion is fixedly connected to the inner wall of the shank end of the screw, and several angle positioning grooves are opened around the fixing hole on the side wall of the rectangular column, and the angle positioning protrusion is inserted into one of the angle positioning grooves.

[0015] As an optimized solution, the connecting column is provided with a threaded section, and the movable support is provided with a threaded hole that matches the threaded section.

[0016] As an optimized solution, both the fixed support and the movable support are arranged in a frustum shape, with their smaller diameter ends facing each other.

[0017] As an optimized solution, a rectangular insertion slot is provided at the center of the upper surface of the support base, and rectangular insertion columns that match the rectangular insertion slot are fixed to the upper and lower ends of the connecting column, respectively.

[0018] As an optimized solution, a drive motor is fixedly connected to the lower surface of the support platform, and the output shaft of the drive motor is fixedly connected to the center position of the lower surface of the support base.

[0019] As an optimized solution, the clamping sleeve is threadedly connected to a first clamping knob, the end of which abuts against the handle end housing of the dial indicator.

[0020] As an optimized solution, a second clamping knob is threaded onto the outer wall of the support sleeve, and the end of the second clamping knob abuts against the slide rod.

[0021] As an optimized solution, a third clamping knob is threaded onto the outer wall of the rectangular tube, and the end of the third clamping knob abuts against the rectangular column.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] The bottom port of the guide is supported by a fixed support base, and the movable support base is screwed onto the connecting column to clamp and secure the top port of the guide. The guide is fixed between the fixed support base and the movable support base. The drive motor drives the support base to rotate, which in turn drives the connecting column to rotate, thus driving the guide to rotate in a circumferential direction, which facilitates processing by surrounding tools. When it is necessary to change the direction of the guide, there is no need to disassemble the movable support base. Just pull the connecting column out of the support base, turn the direction, and insert the rectangular insertion column at the other end into the rectangular insertion slot. It is convenient and quick, and saves the operation of re-clamping the guide.

[0024] By using a detachable dial indicator, when the flatness of the upper and lower end faces of the guide needs to be tested, the slide bar is swung to a horizontal position, the probe end of the dial indicator is placed against the end face of the guide, and then the drive motor rotates the guide to observe the change in the dial indicator value for rapid testing. However, when the roundness of the guide's outer circumference needs to be tested, the slide bar is swung to a vertical position, and then the probe end of the dial indicator is placed against the circumference of the guide for testing, which is convenient and quick. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the angle positioning protrusion of this utility model.

[0028] In the diagram: 1-Support platform; 2-Support base; 3-Rectangular insert column; 4-Connecting column; 5-Fixed support base; 6-Modible support base; 7-Guide; 8-Driver; 9-Dial indicator; 10-Rectangular cylinder; 11-Rectangular column; 12-Clamping sleeve; 13-Slide rod; 14-Support sleeve; 15-First clamping knob; 16-Second clamping knob; 17-Third clamping knob; 18-Screw; 19-Angle positioning protrusion; 20-Angle positioning groove; 21-Nut. Detailed Implementation

[0029] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0030] like Figure 1 and Figure 2 As shown, the quick-change fixture for machining the guide of a turbojet engine includes a support platform 1, a support seat 2 rotatably mounted on the support platform 1, a vertically arranged connecting column 4 detachably connected to the support seat 2, a fixed support seat 5 fixedly connected through the connecting column 4, and a movable support seat 6 slidably mounted above the fixed support seat 5.

[0031] A clamping sleeve 12 is provided on the support platform 1, which is oscillating around the horizontal line. A dial indicator 9 is detachably connected inside the clamping sleeve 12. The clamping sleeve 12 is also vertically adjustable.

[0032] A rectangular tube 10 is vertically fixed on the support platform 1. A rectangular column 11 is slidably inserted into the rectangular tube 10 along its vertical direction. The clamping sleeve 12 is oscillatingly mounted on the rectangular column 11 through a swinging structure.

[0033] The swing structure includes a support sleeve 14 rotatably mounted on the side wall of the rectangular column 11, a slide rod 13 slidably disposed inside the support sleeve 14, and a clamping sleeve 12 fixedly connected to one end of the slide rod 13.

[0034] The rectangular column 11 has a horizontal fixing hole, and a screw 18 is inserted into the fixing hole. The outer wall of the shank end of the screw 18 is fixedly connected to the outer wall of the support sleeve 14, and the end of the screw 18 is threadedly connected to a nut 21 that abuts against the rectangular column 11.

[0035] An angle positioning protrusion 19 is fixedly connected to the inner wall of the shank end of the screw 18. Several angle positioning grooves 20 are opened around the fixing hole on the side wall of the rectangular column 11. The angle positioning protrusion 19 is inserted into one of the angle positioning grooves 20. By loosening the nut 21, the angle positioning protrusion 19 can be inserted into the angle positioning grooves 20 of different angles.

[0036] The connecting column 4 is provided with a threaded section, and the movable support 6 is provided with a threaded hole that matches the threaded section.

[0037] Both the fixed support 5 and the movable support 6 are frustum-shaped, with their smaller diameter ends facing each other. The conical shape facilitates the centering and positioning of the guide 7.

[0038] A rectangular insertion slot is provided at the center of the upper surface of the support base 2, and rectangular insertion columns 3 that match the rectangular insertion slot are fixed to the upper and lower ends of the connecting column 4 respectively.

[0039] A drive motor 8 is fixedly connected to the lower surface of the support platform 1, and the output shaft of the drive motor 8 is fixedly connected to the center position of the lower surface of the support base 2.

[0040] The clamping sleeve 12 is threaded with a first clamping knob 15. The end of the first clamping knob 15 abuts against the handle end housing of the dial indicator 9, which facilitates changing the orientation of the dial indicator 9.

[0041] A second clamping knob 16 is threaded onto the outer wall of the support sleeve 14, and the end of the second clamping knob 16 abuts against the slide rod 13.

[0042] A third clamping knob 17 is threaded onto the outer wall of the rectangular tube 10, and the end of the third clamping knob 17 abuts against the rectangular column 11.

[0043] The working principle of this device is as follows:

[0044] The bottom port of the guide 7 is supported by a fixed support base 5, and the top port of the guide 7 is clamped and secured by a movable support base 6 screwed onto a connecting column 4. The guide 7 is fixed between the fixed support base 5 and the movable support base 6. The drive motor 8 drives the support base 2 to rotate, which in turn drives the connecting column 4 to rotate, thus driving the guide 7 to rotate in a circumferential direction, which is convenient for processing by surrounding tools. When the direction of the guide 7 needs to be changed, there is no need to disassemble the movable support base 6. Just pull the connecting column 4 out of the support base 2, and after turning the direction, insert the rectangular insertion column 3 at the other end into the rectangular insertion slot. It is convenient and quick, and saves the operation of re-clamping the guide 7.

[0045] By using a detachable dial indicator 9, when the flatness of the upper and lower end faces of the guide 7 needs to be tested, the slide bar 13 is swung to a horizontal position, the probe end of the dial indicator 9 is placed against the end face of the guide 7, and then the drive motor 8 drives the guide 7 to rotate, allowing for rapid testing by observing the changes in the dial indicator 9 value. However, when the roundness of the outer circumference of the guide 7 needs to be tested, the slide bar 13 is swung to a vertical position, and then the probe end of the dial indicator 9 is placed against the circumference of the guide 7 for testing, which is convenient and quick.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A quick-change fixture for machining the guide vanes of a turbojet engine, characterized in that: Includes a support platform (1), on which a support seat (2) is rotatably provided, on which a vertically arranged connecting column (4) is detachably connected, and a fixed support seat (5) is fixedly connected through the connecting column (4), and a movable support seat (6) is slidably provided above the fixed support seat (5). The support platform (1) is equipped with a clamping sleeve (12) that swings around the horizontal line as the rotation center. A dial indicator (9) is detachably connected inside the clamping sleeve (12). The clamping sleeve (12) is also vertically raised and lowered.

2. The quick-change fixture for machining the guide of a turbojet engine according to claim 1, characterized in that: A rectangular tube (10) is vertically fixed on the support platform (1), and a rectangular column (11) is slidably inserted into the rectangular tube (10) along the vertical direction. The clamping sleeve (12) is swung and installed on the rectangular column (11) by a swing structure.

3. The quick-change fixture for machining the guide of a turbojet engine according to claim 2, characterized in that: The swing structure includes a support sleeve (14) rotatably mounted on the side wall of the rectangular column (11), a slide rod (13) is slidably provided inside the support sleeve (14), and the clamping sleeve (12) is fixed to one end of the slide rod (13).

4. The quick-change fixture for machining the guide of a turbojet engine according to claim 3, characterized in that: The rectangular column (11) has a horizontal fixing hole, and a screw (18) is inserted into the fixing hole. The outer wall of the shank end of the screw (18) is fixedly connected to the outer wall of the support sleeve (14), and the end of the screw (18) is threadedly connected to a nut (21) that abuts against the rectangular column (11).

5. The quick-change fixture for machining the guide of a turbojet engine according to claim 4, characterized in that: An angle positioning protrusion (19) is fixedly connected to the inner wall of the shank end of the screw (18). Several angle positioning grooves (20) are opened around the fixing hole on the side wall of the rectangular column (11). The angle positioning protrusion (19) is inserted into one of the angle positioning grooves (20).

6. The quick-change fixture for machining the guide of a turbojet engine according to claim 1, characterized in that: The connecting column (4) is provided with a threaded section, and the movable support (6) is provided with a threaded hole that matches the threaded section.

7. The quick-change fixture for machining the guide of a turbojet engine according to claim 1, characterized in that: Both the fixed support base (5) and the movable support base (6) are frustum-shaped and their smaller diameter ends are opposite each other.

8. The quick-change fixture for machining the guide of a turbojet engine according to claim 1, characterized in that: A rectangular insertion slot is provided at the center of the upper surface of the support base (2), and rectangular insertion columns (3) that match the rectangular insertion slot are fixed to the upper and lower ends of the connecting column (4).

9. The quick-change fixture for machining the guide of a turbojet engine according to claim 1, characterized in that: A drive motor (8) is fixedly connected to the lower surface of the support platform (1), and the output shaft of the drive motor (8) is fixedly connected to the center position of the lower surface of the support base (2).

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