A device and method for machining cooling holes for multi-diameter cooling pipes

Abstract

The present invention relates to a device and method for processing cooling holes for cooling tubes with multiple diameters, comprising a chassis, a tube body positioning seat, a pressure hook, a pressure plate, a positioning cone pin, a tube end positioning seat and a positioning key; the base is circular, with a groove on the end face for the positioning key to slide; the tube body positioning seat is a rectangular seat, with an arc-shaped platform on the top that fits the cooling tube and is used to fix the cooling tube, and each tube body positioning seat is equipped with a pressure hook and a pressure plate for pressing the cooling tube. The bottom end of the tube body positioning seat has two bolt holes and a positioning pin hole for fixing the positioning key; the tube end positioning seat is rectangular, with a positioning pin hole on the top end, which is installed on the positioning pin and is used to position the end face of the cooling tube. The present invention utilizes the conversion of the positioning clamping of the cooling tube to perform laser drilling on the cooling holes of cooling tubes of different diameters. It solves the problem of single processing of cooling holes of cooling tubes, reduces processing time, and the processed parts meet the design requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engines, and in particular to a device and a method for machining cooling holes for multi-diameter cooling pipes. Background Art

[0002] After welding, the cooling tube assembly with cooling holes is installed on the outside of the low-pressure turbine casing. Due to the parabolic outer contour of the low-pressure turbine casing, the cooling tubes with cooling holes are installed on the outside of the low-pressure turbine casing with different diameters. Over a hundred φ1 cooling holes are distributed within the cooling tubes, and due to the varying diameters, multiple sets of tooling are required for machining. During machining, the laser must track the rotation in the X, Y, and Z axes to drill the holes in the cooling tubes. This results in low processing efficiency, and due to the influence of the cooling tube's shape, the holes are not aligned in the same cross section. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a device and method for machining cooling holes for multi-diameter cooling pipes; the specific technical solutions are as follows:

[0004] A device for machining cooling holes of multi-diameter cooling pipes, comprising a chassis, a pipe body positioning seat, a pressing hook, a pressing plate, a positioning taper pin, a pipe end positioning seat and a positioning key;

[0005] The chassis is disc-shaped, and a plurality of grooves are evenly distributed along the circumference of its upper end surface. Half of the positioning key is set in the groove, and the other half is exposed at the upper end of the groove; and the positioning key can slide in the groove;

[0006] A plurality of pin holes are symmetrically arranged on the chassis along both sides of the groove;

[0007] The bottom of the groove is provided with a plurality of screw holes, and all of the screw holes are arranged on an axis;

[0008] The lower ends of the tube body positioning seat and the tube end positioning seat are both provided with mounting seats, and the bottom of the mounting seats is provided with a slide groove; the slide groove is provided with two bolt holes and a positioning pin hole for fixing the positioning key;

[0009] The tube body positioning seat is rectangular, with an arc-shaped platform on the upper end, and a raised mounting edge on one side of the arc-shaped platform, which is inclined, and a convex groove is opened on the top of the mounting edge;

[0010] The tube body positioning seat at the lower end of the arc-shaped platform is provided with a mounting opening, the hook-shaped pressure plate is arranged in the mounting opening and can slide along the mounting opening, the shoulder screw slides into the convex groove along the top of the mounting edge, the L-shaped pressure plate covers the top of the mounting edge, the shoulder screw is inserted into the connecting hole of the L-shaped pressure plate, one end of the hook-shaped pressure plate extends upward to cooperate with the arc-shaped platform to place the cooling pipe, the L-shaped pressure plate presses the cooling pipe from the upper end, and the cooling pipe is fastened by the pressure hook provided at the upper end of the L-shaped pressure plate and the pressure hook provided at the tail end of the hook-shaped pressure plate;

[0011] The tube end positioning seat is rectangular, with an inclined positioning block at the upper end. The positioning block is provided with an axial pin hole, and a positioning cone pin is arranged in the pin hole. One end of the cooling tube is inserted into the positioning cone pin to axially position the cooling tube.

[0012] According to the positions of the pipe body positioning seat and the pipe end positioning seat, a limit block is set in the groove at the rear end, and is inserted into the screw hole at the bottom of the groove by screws.

[0013] The cooling hole processing device suitable for multi-diameter cooling pipes has a preferred solution in which the distance between the screw holes on both sides of the groove is set according to the width of the pipe body positioning seat and the lower end mounting seat of the pipe end positioning seat.

[0014] The cooling hole processing device for multi-diameter cooling pipes has a preferred solution in which a plurality of weight-reducing holes are provided on the pipe body positioning seat and the pipe end positioning seat.

[0015] The cooling hole processing device for multi-diameter cooling pipes has a preferred solution of adjusting the corresponding positions of the pipe body positioning seat and the pipe end positioning seat according to the diameter of the cooling pipe to be processed.

[0016] The cooling hole processing device suitable for multi-diameter cooling pipes has a preferred solution in which three pipe end positioning seats are arranged along the circumference, and pipe body positioning seats are evenly distributed between adjacent pipe end positioning seats; the tooling can clamp three cooling pipes of the same diameter at a time.

[0017] The preferred solution of the cooling hole processing device for multi-diameter cooling pipes is to set pin holes at different positions on the chassis according to different cooling pipe diameters.

[0018] A method for using a cooling hole machining device for multi-diameter cooling pipes, comprising the following steps:

[0019] Step 1: Align and fix the tooling chassis on the turntable of the equipment. Adjust the tube body positioning seat and tube end positioning seat according to the diameter of the cooling tube to be processed, and fix them with pins.

[0020] Step 2: Fit one end of the cooling tube to the positioning pin on one end of the tube end positioning seat, and place it into the curved platform of the tube body positioning seat;

[0021] Step 3: Press the placed cooling pipe with the L-shaped pressing plate and the hook-shaped pressing plate, and tighten the cooling pipe with the pressing hook;

[0022] Step 4: Adjust the laser transmitter to the height to be processed, test the laser drilling program, and drill holes in the cooling pipe.

[0023] Step 5: Repeat steps 1 to 4 according to the diameter of the cooling tube to complete the laser drilling of the cooling tube.

[0024] Compared with the prior art, the present invention has the following beneficial technical effects:

[0025] The present invention designs a ring-shaped clamping cooling pipe. The laser emitter processes the cooling holes inside the cooling pipe along the rotation center. At the same time, the conversion of the positioning and clamping of the cooling pipe is used to solve the problem of single processing of the cooling holes of the cooling pipe.

[0026] The cooling pipe punching device of the present invention has a simple structure, fast and stable clamping and positioning. It can clamp cooling pipes of different diameters, and the tooling is easy to disassemble, saving the manufacturing cost of multiple sets of tooling. It optimizes the laser drilling process, saving processing time, and the processed parts meet design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of a cooling hole processing device suitable for multi-diameter cooling pipes;

[0028] Figure 2 It is a cross-sectional view of the cooling hole processing device;

[0029] Figure 3 for Figure 2 Magnified image of;

[0030] Figure 4 Schematic diagram of the cooling pipe structure;

[0031] Figure 5 for Figure 4 AA direction schematic diagram;

[0032] Figure 6 for Figure 4 II-direction enlarged view.

[0033] In the figure: 1-chassis, 2-tube body positioning seat, 3-pressure hook, 4-L-shaped pressure plate, 5-positioning taper pin, 6-tube end positioning seat, 7-positioning key, 8-cooling pipe, 9-groove, 10-arc-shaped platform, 11-mounting edge, 12-convex groove, 13-hook-shaped pressure plate, 14-limiting block, 15-weight reduction hole. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-6 The present invention is described in detail, but the protection scope of the present invention is not limited by the accompanying drawings.

[0035] A device for machining cooling holes of multi-diameter cooling pipes, comprising a chassis 1, a pipe body positioning seat 2, a pressing hook 3, a pressing plate 4, a positioning taper pin 5, a pipe end positioning seat 6, and a positioning key 7;

[0036] The chassis 1 is disc-shaped, and a plurality of grooves 9 are evenly distributed along the circumference of its upper end surface. The positioning key 7 is half set in the groove 9 and half is exposed at the upper end of the groove 9; and the positioning key 7 can slide in the groove 9;

[0037] A plurality of pin holes are symmetrically arranged on the chassis 1 along both sides of the groove 9;

[0038] The bottom of the groove 9 is provided with a plurality of screw holes, and all of them are arranged on an axis;

[0039] The lower ends of the tube body positioning seat 2 and the tube end positioning seat 6 are both provided with mounting seats, and the bottom of the mounting seats is provided with a slide groove; the slide groove is provided with two bolt holes and a positioning pin hole for fixing the positioning key 7;

[0040] The tube body positioning seat 2 is rectangular, with an arc-shaped platform 10 at the upper end, and a raised mounting edge 11 is provided on one side of the arc-shaped platform 10, which is inclined, and a convex groove 12 is provided at the top of the mounting edge 11;

[0041] A mounting opening is provided on the tube body positioning seat 2 at the lower end of the arc-shaped platform 10, and a hook-shaped pressure plate 13 is arranged in the mounting opening and can slide along the mounting opening. The shoulder screw slides into the convex groove 12 at the top of the mounting edge, and the L-shaped pressure plate 4 covers the top of the mounting edge 11. The shoulder screw is inserted into the connecting hole of the L-shaped pressure plate 4. One end of the hook-shaped pressure plate 13 extends upward to cooperate with the arc-shaped platform 10 to place the cooling pipe 8. The L-shaped pressure plate 4 presses the cooling pipe 8 from the upper end, and the cooling pipe 8 is fastened by the pressure hook 3 provided on the upper end of the L-shaped pressure plate 4 and the pressure hook 3 provided on the tail end of the hook-shaped pressure plate 13;

[0042] The pipe end positioning seat 6 is rectangular, with an inclined positioning block at the upper end. The positioning block is provided with an axial pin hole, and a positioning cone pin 5 is set in the pin hole. One end of the cooling pipe 8 is plugged into the positioning cone pin 5 for axial positioning of the cooling pipe 8.

[0043] According to the positions of the tube body positioning seat 2 and the tube end positioning seat 6, a limit block 14 is set in the groove 9 at the rear end thereof, and is inserted into the screw hole at the bottom of the groove 9 by screws.

[0044] The distance between the screw holes on both sides of the groove 9 is set according to the width of the lower end mounting seat of the tube body positioning seat 2 and the tube end positioning seat 6.

[0045] The pipe body positioning seat 2 and the pipe end positioning seat 6 are provided with a plurality of weight-reducing holes.

[0046] Adjust the corresponding positions of the tube body positioning seat 2 and the tube end positioning seat 6 according to the diameter of the cooling tube to be processed.

[0047] The tube end positioning seats 6 are provided three along the circumference, and the tube body positioning seats 2 are evenly distributed between adjacent tube end positioning seats 6; the tooling can clamp three cooling tubes 8 of the same diameter at one time.

[0048] According to different diameters of the cooling pipes 8 , the latch holes are set at different positions on the chassis 1 .

[0049] A method for using a cooling hole machining device for multi-diameter cooling pipes, comprising the following steps:

[0050] Step 1: Align and fix the tooling chassis on the turntable of the equipment. Adjust the tube body positioning seat and tube end positioning seat according to the diameter of the cooling tube to be processed, and fix them with pins.

[0051] Step 2: Fit one end of the cooling tube to the positioning pin on one end of the tube end positioning seat, and place it into the curved platform of the tube body positioning seat;

[0052] Step 3: Press the placed cooling pipe with the L-shaped pressing plate and the hook-shaped pressing plate, and tighten the cooling pipe with the pressing hook;

[0053] Step 4: Adjust the laser transmitter to the height to be processed, test the laser drilling program, and drill holes in the cooling pipe.

[0054] Step 5: Repeat steps 1 to 4 according to the diameter of the cooling tube to complete the laser drilling of the cooling tube.

Claims

1. A device for machining cooling holes for multi-diameter cooling pipes, characterized by: It includes chassis, pipe body positioning seat, pressure hook, pressure plate, positioning taper pin, pipe end positioning seat and positioning key; The chassis is disc-shaped, and a plurality of grooves are evenly distributed along the circumference of its upper end surface. Half of the positioning key is set in the groove, and the other half is exposed at the upper end of the groove; and the positioning key can slide in the groove; A plurality of pin holes are symmetrically arranged on the chassis along both sides of the groove; The bottom of the groove is provided with a plurality of screw holes, and all of the screw holes are arranged on an axis; The lower ends of the tube body positioning seat and the tube end positioning seat are both provided with mounting seats, and the bottom of the mounting seats is provided with a slide groove; the slide groove is provided with two bolt holes and a positioning pin hole for fixing the positioning key; The tube body positioning seat is rectangular, with an arc-shaped platform on the upper end, and a raised mounting edge on one side of the arc-shaped platform, which is inclined, and a convex groove is opened on the top of the mounting edge; The tube body positioning seat at the lower end of the arc-shaped platform is provided with a mounting opening, the hook-shaped pressure plate is arranged in the mounting opening and can slide along the mounting opening, the shoulder screw slides into the convex groove along the top of the mounting edge, the L-shaped pressure plate covers the top of the mounting edge, the shoulder screw is inserted into the connecting hole of the L-shaped pressure plate, one end of the hook-shaped pressure plate extends upward to cooperate with the arc-shaped platform to place the cooling pipe, the L-shaped pressure plate presses the cooling pipe from the upper end, and the cooling pipe is fastened by the pressure hook provided at the upper end of the L-shaped pressure plate and the pressure hook provided at the tail end of the hook-shaped pressure plate; The tube end positioning seat is rectangular, with an inclined positioning block at the upper end. The positioning block is provided with an axial pin hole, and a positioning cone pin is arranged in the pin hole. One end of the cooling tube is inserted into the positioning cone pin to axially position the cooling tube. According to the positions of the pipe body positioning seat and the pipe end positioning seat, a limit block is set in the groove at the rear end, and is inserted into the screw hole at the bottom of the groove by screws.

2. The device for machining cooling holes for multi-diameter cooling pipes according to claim 1, characterized in that: The distance between the screw holes on both sides of the groove is set according to the width of the pipe body positioning seat and the lower end mounting seat of the pipe end positioning seat.

3. The device for machining cooling holes for multi-diameter cooling pipes according to claim 1, characterized in that: The pipe body positioning seat and the pipe end positioning seat are provided with a plurality of weight-reducing holes.

4. The device for machining cooling holes for multi-diameter cooling pipes according to claim 1, characterized in that: Adjust the corresponding positions of the tube body positioning seat and the tube end positioning seat according to the diameter of the cooling tube to be processed.

5. The device for machining cooling holes for multi-diameter cooling pipes according to claim 1, characterized in that: Three pipe end positioning seats are arranged along the circumference, and pipe body positioning seats are evenly distributed between adjacent pipe end positioning seats; the tooling can clamp three cooling pipes of the same diameter at one time.

6. The device for machining cooling holes for multi-diameter cooling pipes according to claim 1, characterized in that: According to the different cooling pipe diameters, the pin holes are set at different positions on the chassis.

7. The method for using the device for machining cooling holes in multi-diameter cooling pipes according to claim 1, characterized in that: The following steps are involved: Step 1: Align and fix the tooling chassis on the turntable of the equipment. Adjust the tube body positioning seat and tube end positioning seat according to the diameter of the cooling tube to be processed, and fix them with pins. Step 2: Fit one end of the cooling tube to the positioning pin on one end of the tube end positioning seat, and place it into the curved platform of the tube body positioning seat; Step 3: Press the placed cooling pipe with the L-shaped pressing plate and the hook-shaped pressing plate, and tighten the cooling pipe with the pressing hook; Step 4: Adjust the laser transmitter to the height to be processed, test the laser drilling program, and drill holes in the cooling pipe; Step 5: Repeat steps 1 to 4 according to the diameter of the cooling tube to complete the laser drilling of the cooling tube.

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