Cooling hole machining device and method suitable for multi-diameter cooling pipe

Abstract

The invention relates to a cooling hole machining device and method suitable for a multi-diameter cooling pipe. The cooling hole machining device comprises a base plate, a pipe body positioning seat, a pressing hook, a pressing plate, a positioning taper pin, a pipe end positioning seat and a positioning key. The base is circular, and the end face is provided with a groove for the positioning key to slide; the pipe body positioning seats are rectangular seats, arc-shaped tables attached to the cooling pipes are arranged above the pipe body positioning seats and used for fixing the cooling pipes, and each pipe body positioning seat is provided with a pressing hook and a pressing plate which are used for pressing the cooling pipes. Two bolt holes and a positioning pin hole are formed in the bottom end of the pipe body positioning seat and are used for fixing the positioning key; the pipe end positioning seat is rectangular, a positioning pin hole is formed in the upper end of the pipe end positioning seat, and a positioning pin is installed in the positioning pin hole and used for positioning the end face of the cooling pipe. According to the laser drilling device, laser drilling can be carried out on cooling holes of cooling pipes with different diameters through conversion of positioning and clamping of the cooling pipes. The problem that the cooling hole of the cooling pipe is singly machined is solved, the machining time is shortened, and the machined part meets the design requirement.

Description

Technical Field

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

[0002] After welding, the cooling pipe assembly with cooling holes is installed on the outside of the low-pressure turbine casing. Since the outer contour of the low-pressure turbine casing is parabolic, the cooling pipes with cooling holes are of different diameters and are installed on the outside of the low-pressure turbine casing. There are more than a hundred φ1 cooling holes distributed inside the cooling pipe, and due to the different diameters, multiple sets of tooling are required for processing. During processing, the laser needs to track and rotate in X, Y, and Z to punch holes in the cooling pipe. The processing efficiency is low, and at the same time, affected by the forming of the cooling pipe, the holes after processing are not on the same section. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a cooling hole processing device and method suitable for multi-diameter cooling pipes; the specific technical solution is as follows:

[0004] A cooling hole processing device suitable for 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 bottom plate is in the shape of a disk, and a plurality of grooves are evenly distributed along the circumference of the upper end surface thereof, half of the positioning key is arranged 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 at the upper end, and a raised mounting edge is provided on one side of the arc-shaped platform, which is inclined, and a convex groove is provided at the top of the mounting edge;

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

[0012] According to the positions of the pipe body positioning seat and the pipe end positioning seat, a limit block is arranged in the groove at the rear end thereof, and is inserted into the screw hole at the bottom of the groove by means of 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 suitable 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 one time.

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

[0018] A method for using a cooling hole processing 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. According to the diameter of the cooling tube to be processed, adjust the tube body positioning seat and the tube end positioning seat, and fix them with pins;

[0020] Step 2: Fit one end of the cooling tube to the positioning pin at one end of the tube end positioning seat, and put it into the arc-shaped table of the tube body positioning seat at the same time;

[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 tube.

[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, and the laser emitter processes the cooling hole inside the cooling pipe along the rotation center. At the same time, the conversion of the positioning clamping of the cooling pipe is used to solve the problem of single processing of the cooling hole 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. The laser punching processing method is optimized, saving processing time; the processed parts meet the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It 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 A magnified image of

[0030] Figure 4 It is a 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-pressing hook, 4-L-shaped pressing plate, 5-positioning cone pin, 6-tube end positioning seat, 7-positioning key, 8-cooling pipe, 9-groove, 10-arc-shaped platform, 11-installing edge, 12-convex groove, 13-hook-shaped pressing 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 cone 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. Half of the positioning key 7 is arranged in the groove 9, and the other 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] The tube body positioning seat 2 at the lower end of the arc-shaped platform 10 is provided with an installation opening, and the hook-shaped pressing plate 13 is arranged in the installation opening and can slide along the installation opening, and the shoulder screw slides into the convex groove 12 at the top of the installation edge, and the L-shaped pressing plate 4 covers the top of the installation edge 11, and the shoulder screw is inserted into the connecting hole of the L-shaped pressing plate 4. One end of the hook-shaped pressing plate 13 extends upward to cooperate with the arc-shaped platform 10 to place the cooling tube 8, and the L-shaped pressing plate 4 presses the cooling tube 8 from the upper end, and the cooling tube 8 is fastened by the pressing hook 3 set at the upper end of the L-shaped pressing plate 4 and the pressing hook 3 set at the tail end of the hook-shaped pressing plate 13;

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

[0043] According to the positions of the tube body positioning seat 2 and the tube end positioning seat 6, a limiting block 14 is arranged 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 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] The corresponding positions of the tube body positioning seat 2 and the tube end positioning seat 6 are adjusted according to the diameter of the cooling tube to be processed.

[0047] The tube end positioning seats 6 are arranged 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 pipe 8 , the latch holes are set at different positions on the chassis 1 .

[0049] A method for using a cooling hole processing 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. According to the diameter of the cooling tube to be processed, adjust the tube body positioning seat and the tube end positioning seat, and fix them with pins;

[0051] Step 2: Fit one end of the cooling tube to the positioning pin at one end of the tube end positioning seat, and put it into the arc-shaped table of the tube body positioning seat at the same time;

[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 tube.

[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 cooling hole processing device suitable for multi-diameter cooling pipes, characterized in that: It includes 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; The bottom plate is in the shape of a disk, and a plurality of grooves are evenly distributed on its upper end surface along the circumference, and half of the positioning key is arranged 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 at the upper end, and a raised mounting edge is provided on one side of the arc-shaped platform, which is inclined, and a convex groove is provided at the top of the mounting edge; A mounting opening is provided on the tube body positioning seat at the lower end of the arc-shaped platform, a hook-shaped pressing plate is arranged in the mounting opening and can slide along the mounting opening, a shoulder screw slides into the convex groove at the top end of the mounting edge, the L-shaped pressing plate covers the top end of the mounting edge, the shoulder screw is plugged into the connecting hole of the L-shaped pressing plate, one end of the hook-shaped pressing plate extends upward to cooperate with the arc-shaped platform to place the cooling pipe, the L-shaped pressing plate presses the cooling pipe from the upper end, and the cooling pipe is fastened by the pressing hook arranged at the upper end of the L-shaped pressing plate and the pressing hook arranged at the tail end of the hook-shaped pressing 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, a positioning cone pin is arranged in the pin hole, one end of the cooling tube is inserted in the positioning cone pin, and is used for axial positioning of the cooling tube; According to the positions of the pipe body positioning seat and the pipe end positioning seat, a limit block is arranged in the groove at the rear end thereof, and is inserted into the screw hole at the bottom of the groove by means of 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 with 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 different cooling pipe diameters, pin holes are set at different positions on the chassis.

7. The method for using the cooling hole processing device for 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. According to the diameter of the cooling tube to be processed, adjust the tube body positioning seat and the tube end positioning seat, and fix them with pins; Step 2: Fit one end of the cooling tube to the positioning pin at one end of the tube end positioning seat, and put it into the arc-shaped table of the tube body positioning seat at the same time; 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 tube. 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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