Machining method for dovetail joint structure single blade

Abstract

The invention relates to the technical field of single blade machining, in particular to a machining method for a dovetail joint structure single blade, which comprises a workbench, a propeller hub cushion block and a clamping bulge are arranged on the upper end face of the workbench, and clamping mechanisms for positioning a propeller hub are arranged at the two ends of the propeller hub cushion block and the two ends of the clamping bulge. The clamping mechanism comprises a threaded rod rotationally connected with the workbench, the threaded rod is in threaded connection with a limiting plate, the workbench is provided with a limiting rod, and the limiting rod is in sliding connection with the limiting plate. By manufacturing the simple machining tool, clamping and fixing in the machining process of the dovetail joint structure blade are completed, and the manpower and material resource cost is saved; the tool is easy and convenient to use, the inner arc face of the propeller hub machined by a machine tool is assembled with the clamping protrusion, and the positioning precision is high; and according to a designed machining process route, a special machining tool is matched, so that the production efficiency of blade machining is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of single blade processing, and in particular to a machining method for a single blade with a dovetail structure. Background Art

[0002] There are two main types of propellers: fixed-pitch propellers and adjustable-pitch propellers. Currently, the commonly used adjustable-pitch propellers in the shipbuilding field are connected to the hub body using a flange connection structure. The flange-structured adjustable-pitch propeller blade processing route is mature and the process solution is stable. Compared with the flange structure, dovetail structure blades are less used in the shipbuilding field because the dovetail structure is special and the existing clamping tools are not applicable, which reduces the processing efficiency of the blades. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problem and to propose a machining method for a single blade with a dovetail structure.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A machining device for a single blade with a dovetail structure, comprising a workbench, wherein the upper end surface of the workbench is provided with a hub pad and a clamping protrusion, both ends of the hub pad and the clamping protrusion are provided with clamping mechanisms for positioning the hub, the clamping mechanism comprises a threaded rod rotatably connected to the workbench, a limit plate is threadedly connected to the threaded rod, a limit rod is provided on the workbench, the limit rod and the limit plate are slidably connected, and a transmission assembly for driving the threaded rod to rotate is provided at the bottom of the workbench.

[0006] Preferably, the transmission assembly includes a worm wheel arranged at the bottom of the threaded rod, and a limit seat is arranged on the upper end surface of the workbench. A worm engaged with the worm wheel is rotatably connected to the limit seat, and a rotating wheel is arranged at one end of the worm.

[0007] Preferably, it also includes a support plate, on which an air box is arranged, a plurality of limiting cylinders are evenly distributed on the upper end surface of the air box, a support rod is slidably connected inside the limiting cylinder, and an air pump is arranged on the side of the air box.

[0008] Preferably, a clamping block is provided on the side of the support plate, and clamping grooves adapted to the clamping block are provided on both sides of the clamping protrusion.

[0009] A machining method for a single blade with a dovetail structure, comprising the following steps:

[0010] S1: Fix the workbench on the machine tool;

[0011] S2: Welding the pressure blocks on the two side planes of the hub;

[0012] S3: Place the small end of the propeller hub flat on the propeller hub pad, rotate the runner, adjust the height of the limit plate so that it abuts against the pressure block, and fix the propeller hub;

[0013] S4: Fix the support plate to the side of the workbench, and use the air pump to inflate the air box. The gas flows into the limit cylinder, and the support rod is lifted until the top of the support rod abuts against the propeller blade, thus completing the fixation of the propeller blade.

[0014] S5: After the blades are clamped and fixed, the large end face of the hub and the inner and outer arc surfaces of the hub are processed by a machine tool, and the hub is processed to match the clamping protrusion;

[0015] S5: Flip the blades so that the large end of the hub is placed downward on the hub pad, and repeat step S3 to process the small end of the hub and the inner and outer arc surfaces of the hub;

[0016] S6: fit the inner arc surface of the propeller hub to the clamping protrusion, rotate the runner, adjust the height of the limit plate, make it abut against the outer arc surface of the propeller hub, and fix the propeller hub;

[0017] S7: insert the clamping block 16 into the clamping slot, fix the support plate on the side of the clamping protrusion, inflate the air box with air through the air pump, and the gas flows into the limiting cylinder, and the support rod is lifted until the top of the support rod abuts against the blade, so as to fix the blade, and process the blade surface to the finished product;

[0018] S8: After the blade surface processing of the blade is completed, the support plate is adjusted to the back of the blade, and step S7 is repeated to process the back of the blade into a finished product;

[0019] S9: Cut off the pressure blocks welded on both sides of the hub and process the welding surface.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0021] By making simple machining tools, the clamping and fixing of the dovetail structure blades during machining was completed, saving manpower and material costs; the tooling is easy to use, relying on the assembly of the inner arc surface of the hub processed by the machine tool and the clamping protrusion, with high positioning accuracy; according to the designed machining process route, in conjunction with special machining tools, the production efficiency of blade processing is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a machining device provided according to an embodiment of the present invention from a first viewing angle is shown.

[0023] Figure 2 A second perspective structural schematic diagram of a machining device provided according to an embodiment of the present invention is shown.

[0024] Figure 3The embodiment of the present invention provides Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0025] Figure 4 A partial cross-sectional structural schematic diagram of an air box provided according to an embodiment of the present invention is shown.

[0026] Figure 5 A schematic diagram of the combined structure of a hub and a clamping protrusion provided according to an embodiment of the present invention is shown.

[0027] Figure 6 A schematic diagram of the combination of a support plate and a workbench provided according to an embodiment of the present invention is shown.

[0028] Legend:

[0029] 1. Workbench; 2. Hub gasket; 3. Limit rod; 4. Limit plate; 5. Threaded rod; 6. Limit seat; 7. Worm gear; 8. Worm; 9. Rotor; 10. Support plate; 11. Air box; 12. Air pump; 13. Limit cylinder; 14. Support rod; 15. Slot; 16. Block; 17. Clamping protrusion. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-6 , the present invention provides a technical solution:

[0032] A machining device for a single blade with a dovetail structure includes a workbench 1, the upper end surface of the workbench 1 is provided with a hub pad 2 and a clamping protrusion 17, both ends of the hub pad 2 and the clamping protrusion 17 are provided with a clamping mechanism for positioning the hub, the clamping mechanism includes a threaded rod 5 rotatably connected to the workbench 1, a limit plate 4 is threadedly connected to the threaded rod 5, a limit rod 3 is provided on the workbench 1, the limit rod 3 and the limit plate 4 are slidably connected, and a transmission component for driving the threaded rod 5 to rotate is provided at the bottom of the workbench 1; the bottom of the threaded rod 5 is rotatably connected to the workbench 1, the limit rod 3 penetrates the limit plate 4, and the height of the limit plate 4 can be adjusted by rotating the threaded rod 5.

[0033] Specifically, Figure 1 and Figure 3As shown, the transmission assembly includes a worm wheel 7 arranged at the bottom of the threaded rod 5, a limit seat 6 is arranged on the upper end surface of the workbench 1, a worm 8 meshing with the worm wheel 7 is rotatably connected to the limit seat 6, and a rotating wheel 9 is arranged at one end of the worm 8; one end of the worm 8 is provided with a thread, and the other end is not threaded, the end without thread passes through the limit seat 6 and is rotatably connected to the limit seat 6, and the end without thread is provided with a rotating wheel 9, and when the rotating wheel 9 is rotated, the worm 8 drives the threaded rod 5 to rotate through the worm wheel 7.

[0034] Specifically, Figure 4 and Figure 6 As shown, it also includes a support plate 10, on which an air box 11 is arranged, and a plurality of limiting cylinders 13 are evenly distributed on the upper end surface of the air box 11, and a support rod 14 is slidably connected in the limiting cylinder 13, an air pump 12 is arranged on the side of the air box 11, and a clamping block 16 is arranged on the side of the support plate 10, and both sides of the clamping protrusion 17 are provided with a clamping groove 15 adapted to the clamping block 16.

[0035] A machining method for a single blade with a dovetail structure, comprising the following steps:

[0036] S1: Fix the workbench 1 on the machine tool;

[0037] S2: Welding the pressure blocks on the two side planes of the hub;

[0038] S3: Place the small end of the propeller hub flat on the propeller hub pad 2, rotate the runner 9, adjust the height of the limit plate 4 so that it abuts against the pressure block, and fix the propeller hub;

[0039] S4: fix the support plate 10 to the side of the workbench 1, and inflate the air box 11 through the air pump 12, so that the gas flows into the limiting cylinder 13, and the support rod 14 is lifted up until the top of the support rod 14 abuts against the blade, thereby completing the fixing of the blade;

[0040] S5: After the blades are clamped and fixed, the large end face of the hub and the inner and outer arc surfaces of the hub are processed by a machine tool, and the hub is processed to match the clamping protrusion 17;

[0041] S5: The blade is turned over so that the large end face of the propeller hub is placed downward on the propeller hub pad 2, and the small end face of the propeller hub and the inner and outer arc surfaces of the propeller hub are processed after repeating step S3;

[0042] S6: fit the inner arc surface of the hub to the clamping protrusion 17, rotate the runner 9, adjust the height of the limit plate 4, make it abut against the outer arc surface of the hub, and fix the hub;

[0043] S7: insert the clamping block 16 into the clamping slot 15, fix the support plate 10 on the side of the clamping protrusion 17, inflate the air box 11 through the air pump 12, and the gas flows into the limiting cylinder 13, and the support rod 14 is lifted until the top of the support rod 14 abuts against the blade, so as to fix the blade and process the blade surface to the finished product;

[0044] S8: After the blade surface processing is completed, the support plate 10 is adjusted to the back of the blade, and step S7 is repeated to process the back of the blade into a finished product;

[0045] S9: Cut off the pressure blocks welded on both sides of the hub and process the welding surface.

[0046] Working principle: When the propeller needs to be processed, first fix the workbench 1 on the machine tool, then weld the pressure blocks on the two side planes of the hub, place the small end of the hub flat on the hub pad 2, turn the runner 9, the worm 8 drives the threaded rod 5 to rotate through the worm gear 7, and the threaded rod 5 drives the limit plate 4 to change in height until the limit plate 4 abuts against the pressure block. At this time, the hub is fixed, and then the support plate 10 is set under the blade, and the air box 11 is inflated through the air pump 12. The gas flows into the limit cylinder 13, and the support rod 14 is jacked up until the top of the support rod 14 abuts against the blade. After completing the support of the blades, start processing the large end face of the hub and the inner and outer arc surfaces of the hub, then place the large end of the hub against the hub pad 2 to fix it, and process the large end face of the hub and the inner and outer arc surfaces of the hub again. After the processing is completed, place the inner arc surface of the hub on the clamping protrusion 17, first use the clamping mechanism to complete the fixation of the hub, and then place the card block 16 in the card groove 15, and inflate the air box 11 through the air pump 12. The gas flows into the limit cylinder 13, and the support rod 14 is lifted until the top of the support rod 14 abuts against the blade, thus completing the support of the blade, and then the blade is processed.

[0047] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A machining device for a single blade with a dovetail structure, comprising a workbench (1), characterized in that: The upper end surface of the workbench (1) is provided with a propeller hub pad (2) and a clamping protrusion (17), and both ends of the propeller hub pad (2) and the clamping protrusion (17) are provided with clamping mechanisms for positioning the propeller hub; The clamping mechanism comprises a threaded rod (5) rotatably connected to the workbench (1); a limit plate (4) is threadedly connected to the threaded rod (5); a limit rod (3) is arranged on the workbench (1); the limit rod (3) and the limit plate (4) are slidably connected; and a transmission component for driving the threaded rod (5) to rotate is arranged at the bottom of the workbench (1).

2. A machining device for a single blade with a dovetail structure according to claim 1, characterized in that: The transmission assembly comprises a worm wheel (7) arranged at the bottom of the threaded rod (5); a limit seat (6) is arranged on the upper end surface of the workbench (1); a worm (8) meshing with the worm wheel (7) is rotatably connected to the limit seat (6); and a rotating wheel (9) is arranged at one end of the worm (8).

3. The machining device for a single blade with a dovetail structure according to claim 2, characterized in that: It also comprises a support plate (10), on which an air box (11) is arranged, a plurality of limiting cylinders (13) are evenly distributed on the upper end surface of the air box (11), a support rod (14) is slidably connected inside the limiting cylinder (13), and an air pump (12) is arranged on the side of the air box (11).

4. The machining device for a single blade with a dovetail structure according to claim 3, characterized in that: A clamping block (16) is provided on the side of the support plate (10), and clamping grooves (15) adapted to the clamping block (16) are provided on both sides of the clamping protrusion (17).

5. A machining method for a single blade with a dovetail structure, using the machining device according to claim 4, characterized in that: The following steps are involved: S1: Fixing the workbench (1) on the machine tool; S2: Welding the pressure blocks on the two side planes of the hub; S3: Place the small end of the propeller hub flat on the propeller hub pad (2), rotate the rotating wheel (9), adjust the height of the limit plate (4), make it abut against the pressure block, and fix the propeller hub; S4: fix the support plate (10) to the side of the workbench (1), and inflate the air box (11) with air through the air pump (12), so that the air flows into the limiting cylinder (13), and the support rod (14) is lifted up until the top of the support rod (14) contacts the propeller blade, thereby completing the fixing of the propeller blade; S5: After the blades are clamped and fixed, the large end face of the hub and the inner and outer arc surfaces of the hub are processed by a machine tool, and the hub is processed to match the clamping protrusion (17); S5: The blade is turned over so that the large end face of the propeller hub is placed downward on the propeller hub pad (2), and the small end face of the propeller hub and the inner and outer arc surfaces of the propeller hub are processed by repeating step S3; S6: fit the inner arc surface of the propeller hub to the clamping protrusion (17), rotate the rotating wheel (9), adjust the height of the limit plate (4), make it abut against the outer arc surface of the propeller hub, and fix the propeller hub; S7: inserting the clamping block 16 into the clamping groove (15), fixing the support plate (10) on the side of the clamping protrusion (17), inflating the air box (11) through the air pump (12), and the gas flows into the limiting cylinder (13), and the support rod (14) is lifted until the top of the support rod (14) abuts against the blade, thereby fixing the blade, and processing the blade surface to a finished product; S8: After the blade surface processing is completed, the support plate (10) is adjusted to the back side of the blade, and step S7 is repeated to process the back side of the blade into a finished product; S9: Cut off the pressure blocks welded on both sides of the hub and process the welding surface.

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