Tool for machining round threads of blade root of metal blade

Abstract

The utility model discloses a tool for processing a round thread at the root of a metal paddle, which relates to the technical field of propeller processing and comprises a limiting element, a connecting element and an adjusting element, the limiting element is used for sleeving the periphery of the paddle and limiting the paddle, the connecting element is fixed at one end of the limiting element, and the adjusting element is fixed at the other end of the limiting element. The connecting element can be arranged on the peripheries of the paddles in a sleeving mode, and the adjusting element is movably installed on the connecting element and can tightly press the paddles with different outer diameters. The device is easy to operate, wide in application range and high in machining reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of propeller processing, in particular to a tooling for processing the circular thread at the root of a metal blade. Background Art

[0002] The propeller is a key component in the power machinery of an air-cushion landing craft. As the main component of the propeller, the blade mainly provides greater power for the air-cushion landing craft, and at the same time adjusts the blade angle as needed to achieve variable pitch of the propeller blade and improve the working efficiency of the propeller.

[0003] There is a circular thread on the outer circle of the root of the metal blade. Since the circular thread is closely matched with the propeller hub assembly, its transmission accuracy requirement is very high. Therefore, the processing technological process of the circular thread is complex and difficult. Due to the special structure of the metal blade, the general clamping method cannot be used for processing, and only a special device can be used for clamping. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a tooling for processing the circular thread at the root of a metal blade, so as to solve the problems existing in the above-mentioned prior art, with simple operation, wide application range, and high processing reliability.

[0005] To achieve the above purpose, the utility model provides the following scheme:

[0006] The utility model provides a tooling for processing the circular thread at the root of a metal blade, including a limiting element, a connecting element, and an adjusting element. The limiting element is used to be sleeved on the outer periphery of the blade to limit the blade. The connecting element is fixed at one end of the limiting element, and the connecting element can be sleeved on the outer periphery of the blade. The adjusting element is movably installed on the connecting element, and the adjusting element can press the blades with different outer diameters.

[0007] Preferably, the limiting element includes a disc, an upper limiting part, and a lower limiting part. A circular hole for the blade to pass through is formed in the middle of the disc. The upper limiting part and the lower limiting part are symmetrically installed on one side of the disc, and the upper limiting part and the lower limiting part are respectively arranged close to the upper and lower sides of the circular hole. Both the upper limiting part and the lower limiting part are fixed to the connecting element.

[0008] Preferably, the upper limiting part and the lower limiting part have the same structure, and both include a left reinforcing rib, a channel steel, a connecting plate, and a right reinforcing rib. The first end of the channel steel is fixed to the disc, the second end of the channel steel extends along the length direction of the blade, and the connecting plate is fixed to the second end of the channel steel. The left reinforcing rib and the right reinforcing rib are respectively fixed to both sides of the channel steel. The upper and lower ends of the connecting element are respectively installed on the two connecting plates.

[0009] Preferably, a number of counterweight blocks are installed on each of the left reinforcing ribs and each of the right reinforcing ribs.

[0010] Preferably, the connecting element includes an upper pressing plate, a lower pressing plate and two connectors. The upper pressing plate and the lower pressing plate are symmetrically arranged. The lower ends of the two connectors are respectively hinged to both ends of the lower pressing plate through pins, and the upper ends of the two connectors are respectively installed on both ends of the upper pressing plate through screws. The upper pressing plate is installed on the connecting plate in the upper limiting part, and the lower pressing plate is installed on the connecting plate in the lower limiting part.

[0011] Preferably, a plurality of stepped holes are formed in both the upper pressing plate and the lower pressing plate. The stepped holes on the upper pressing plate are arranged in sequence along the length direction of the upper pressing plate, and the stepped holes on the lower pressing plate are arranged in sequence along the length direction of the lower pressing plate. The adjusting element is installed in the stepped holes.

[0012] Preferably, the adjusting element includes a plurality of bushings and a plurality of adjusting bolts. The stepped holes, the bushings and the adjusting bolts correspond to each other one by one. The bushings are press-fitted into the stepped holes. The adjusting bolts are threadedly connected to the bushings and tightened by adjusting nuts. The adjusting bolts can move up and down along the bushings, and one end of the adjusting bolt is used to abut against the outer wall of the blade.

[0013] Preferably, the limiting element and the connecting element are integrally formed by welding.

[0014] The utility model has achieved the following technical effects compared with the prior art:

[0015] The tooling for processing the root circular thread of a metal blade provided by the utility model. The limiting element is used to sleeved on the outer periphery of the blade to limit the blade. The connecting element is fixed to one end of the limiting element, and the connecting element can be sleeved on the outer periphery of the blade. The adjusting element is movably installed on the connecting element, and the adjusting element can press different outer diameter blades, so as to adjust the support range of the adjusting element, realize the support and locking of the blade profile, make the metal blade continuously maintain the locked state during the process of processing the root circular thread, improve the processing reliability, the overall structure is simple, the operation is convenient, and the applicable range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the tooling for machining the circular thread at the root of the metal blade during use in the present utility model;

[0018] Figure 2 Partial structural schematic diagram of the tooling for machining the circular thread at the root of the metal blade in the present utility model;

[0019] Figure 3 Top view of the tooling for machining the circular thread at the root of the metal blade in the present utility model;

[0020] Figure 4 Cross-sectional view of the tooling for machining the circular thread at the root of the metal blade in the present utility model;

[0021] Figure 5 Structural schematic diagram of the upper pressing plate and the lower pressing plate in the present utility model;

[0022] Figure 6 Structural schematic diagram of the joint in the present utility model;

[0023] Figure 7 Schematic diagram of the blade installed on the machine tool in the present utility model;

[0024] In the figure: 1 - joint, 2 - upper pressing plate, 3 - bushing, 4 - adjusting bolt, 5 - left reinforcing rib, 6 - right reinforcing rib, 7 - counterweight screw, 8 - counterweight block, 9 - counterweight nut, 10 - split pin, 11 - screw, 12 - pin, 13 - upper channel steel, 14 - lower channel steel, 15 - lower pressing plate, 16 - disc, 17 - adjusting nut, 18 - connecting plate, 19 - stepped hole, 20 - blade, 21 - blade root, 22 - circular thread, 23 - machine tool center, 24 - machine tool tailstock. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] The purpose of the present utility model is to provide a tooling for machining the circular thread at the root of the metal blade, so as to solve the problems existing in the prior art, with simple operation, wide application range, and high machining reliability.

[0027] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0028] As shown Figures 1-7 in the figure, this embodiment provides a tooling for machining the circular thread of the blade root of a metal blade, which includes a limiting element, a connecting element, and an adjusting element. The limiting element is used to be sleeved on the outer periphery of the blade 20 to limit the blade 20. The connecting element is fixed to one end of the limiting element, and the connecting element can be sleeved on the outer periphery of the blade 20. The adjusting element is movably installed on the connecting element, and the adjusting element can press the blade 20 with different outer diameters, so as to adjust the support range of the adjusting element, realize the support and locking of the blade profile of the blade 20, and enable the metal blade 20 to continuously maintain a locked state during the process of machining the circular thread 22 of the blade root 21, which can improve the machining reliability. The overall structure is simple, the operation is convenient, and the applicable range is wide.

[0029] Specifically, the limiting element includes a disc 16, an upper limiting part, and a lower limiting part. A circular hole for the blade 20 to pass through is opened in the middle of the disc 16, so as to limit the blade 20 through the circular hole, and it is convenient for the machine tool center 23 to abut against one end of the blade 20. The upper limiting part and the lower limiting part are symmetrically installed on one side of the disc 16, and the upper limiting part and the lower limiting part are respectively arranged close to the upper and lower sides of the circular hole. The upper limiting part and the lower limiting part are both fixed to the connecting element, so as to facilitate clamping the blade 20 by the adjusting element on the connecting element.

[0030] The structures of the upper limiting part and the lower limiting part are the same, and both include a left reinforcing rib 5, a channel steel, a connecting plate 18, and a right reinforcing rib 6. The first end of the channel steel is fixed to the disc 16, and the second end of the channel steel extends along the length direction of the blade 20. The channel steel plays a role in connecting the disc 16 and the connecting element. The connecting plate 18 is fixed to the second end of the channel steel. The left reinforcing rib 5 and the right reinforcing rib 6 are respectively fixed to both sides of the channel steel. The upper and lower ends of the connecting element are respectively installed on the two connecting plates 18. Among them, the channel steel in the upper limiting part is the upper channel steel 13, and the channel steel in the lower limiting part is the lower channel steel 14.

[0031] A number of counterweight blocks 8 are installed on each left reinforcing rib 5 and each right reinforcing rib 6. The counterweight blocks 8 can play a role in adjusting the balance, reduce the ovality generated by the centrifugal force during the process of turning the circular thread 22 of the blade root 21, and help improve the dimensional accuracy of the circular thread 22 of the machined blade root 21. The counterweight blocks 8 are installed on each left reinforcing rib 5 and each right reinforcing rib 6 by using counterweight screws 7, split pins 10, and counterweight nuts 9.

[0032] The connecting element includes an upper pressing plate 2, a lower pressing plate 15 and two connectors 1. The upper pressing plate 2 and the lower pressing plate 15 are symmetrically arranged. The lower ends of the two connectors 1 are respectively hinged to both ends of the lower pressing plate 15 through pins 12, and the upper ends of the two connectors 1 are respectively installed at both ends of the upper pressing plate 2 through screws 11. The upper pressing plate 2 is installed on the connecting plate 18 in the upper limiting part, and the lower pressing plate 15 is installed on the connecting plate 18 in the lower limiting part. After removing the screw 11, the connector 1 can rotate quickly by 360° around the pin 12, thereby realizing the quick installation and disassembly of the blade 20. Before machining the circular thread 22 of the blade root 21, open the connector 1, place the blade 20 into the tooling for machining the circular thread of the metal blade root in this embodiment, and then close the connector 1 and tighten it with the screw 11.

[0033] A plurality of stepped holes 19 are provided on both the upper pressing plate 2 and the lower pressing plate 15, and the stepped holes 19 on the upper pressing plate 2 are arranged in sequence along the length direction of the upper pressing plate 2, and the stepped holes 19 on the lower pressing plate 15 are arranged in sequence along the length direction of the lower pressing plate 15. The adjusting elements are installed in the stepped holes 19.

[0034] The adjusting element includes a plurality of bushings 3 and a plurality of adjusting bolts 4. The stepped holes 19, the bushings 3 and the adjusting bolts 4 correspond to each other one by one. As a preferred solution, there are 8 stepped holes 19 on both the upper pressing plate 2 and the lower pressing plate 15. The bushings 3 are press-fitted into the stepped holes 19, and the adjusting bolts 4 are threadedly connected to the bushings 3 and tightened by adjusting nuts 17. By rotating the adjusting bolts 4, the adjusting bolts 4 can move up and down along the bushings 3, and then by adjusting the enclosing area and shape between the plurality of adjusting bolts 4, the profile of the blade 20 with various sizes can be well supported and locked, so that the metal blade 20 remains in a locked state continuously during the process of machining the circular thread 22 of the blade root 21.

[0035] One end of the adjusting bolt 4 is used to abut against the outer wall of the blade 20, and the adjustment is simple and the operation is convenient.

[0036] The limiting element and the connecting element are integrated by welding, that is, the upper pressing plate 2, the left reinforcing rib 5, the right reinforcing rib 6, the upper channel steel 13, the lower channel steel 14, the lower pressing plate 15, the disc 16 and the connecting plate 18 are integrated by welding, making the overall structure simple, the operation efficient, and the rigidity good.

[0037] The specific usage method of this embodiment is as follows:

[0038] 1. Connect the tooling for machining the circular thread of the metal blade root in this embodiment to the machine tool equipment, and ensure that the rotation center of the tooling for machining the circular thread of the metal blade root coincides with the spindle center of the machine tool equipment;

[0039] 2. Open the joint 1 and place the metal blade 20 into the tooling for machining the circular thread of the blade root of the metal blade. First, connect the metal blade 20 to the machine center 23 and the machine tailstock 24. Then, close the joint 1 and tighten it with the screw 11. Finally, move the adjusting bolt up and down along the thread of the bushing 3 to support and lock the blade surface of the blade 20, so that the metal blade 20 remains locked during the process of machining the circular thread 22 of the blade root 21.

[0040] 3. After the above two steps are completed, the machining of the circular thread 22 of the blade root 21 in the metal blade 20 can be carried out.

[0041] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. At the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A tool for machining circular threads at the root of a metal blade, characterized in that: It includes a limiting element, a connecting element and an adjusting element. The limiting element is used to be sleeved on the outer periphery of the blade and limit the blade. The connecting element is fixed to one end of the limiting element and can be sleeved on the outer periphery of the blade. The adjusting element is movably installed on the connecting element and can press the blades with different outer diameters.

2. The tool for machining the round thread of the root of a metal blade according to claim 1, characterized in that: The limiting element includes a disc, an upper limiting portion and a lower limiting portion. A circular hole for the blade to pass through is opened in the middle of the disc. The upper limiting portion and the lower limiting portion are symmetrically installed on one side of the disc, and the upper limiting portion and the lower limiting portion are respectively arranged close to the upper and lower sides of the circular hole. The upper limiting portion and the lower limiting portion are both fixed to the connecting element.

3. The tool for machining the round thread of the root of a metal blade according to claim 2, characterized in that: The upper limit portion and the lower limit portion have the same structure and both include a left reinforcing rib, a channel steel, a connecting plate and a right reinforcing rib. The first end of the channel steel is fixed to the disc, the second end of the channel steel extends along the length direction of the blade, and the connecting plate is fixed to the second end of the channel steel. The left reinforcing rib and the right reinforcing rib are respectively fixed to both sides of the channel steel, and the upper and lower ends of the connecting element are respectively mounted on the two connecting plates.

4. The tool for machining the round thread of the root of a metal blade according to claim 3, characterized in that: A plurality of counterweight blocks are installed on each of the left reinforcing ribs and each of the right reinforcing ribs.

5. The tool for machining the round thread of the root of a metal blade according to claim 3, characterized in that: The connecting element includes an upper pressing plate, a lower pressing plate and two joints, the upper pressing plate and the lower pressing plate are symmetrically arranged, the lower ends of the two joints are hinged to the two ends of the lower pressing plate by pins, and the upper ends of the two joints are installed on the two ends of the upper pressing plate by screws, the upper pressing plate is installed on the connecting plate in the upper limit part, and the lower pressing plate is installed on the connecting plate in the lower limit part.

6. The tool for machining the round thread of the root of a metal blade according to claim 5, characterized in that: The upper pressing plate and the lower pressing plate are both provided with a plurality of step holes, and the step holes on the upper pressing plate are arranged in sequence along the length direction of the upper pressing plate, and the step holes on the lower pressing plate are arranged in sequence along the length direction of the lower pressing plate, and the step holes are used to install the adjusting elements.

7. The tool for machining the round thread of the root of a metal blade according to claim 6, characterized in that: The adjusting element includes a plurality of bushings and a plurality of adjusting bolts. The step holes, bushings and adjusting bolts correspond to each other one by one. The bushings are pressed into the step holes. The adjusting bolts are threadedly connected in the bushings and tightened by adjusting nuts. The adjusting bolts can move up and down along the bushings. One end of the adjusting bolts is used to abut against the outer wall of the blade.

8. The tool for machining the round thread at the root of a metal blade according to claim 1, characterized in that: The limiting element and the connecting element are integrated into one by welding.

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