Clamping tool and method for engine rotor

Abstract

The invention relates to the technical field of aero-engine detection tools, in particular to a clamping tool and method for an engine rotor, and the clamping tool is used for rotation in the automatic eddy current detection process of the aero-engine rotor. The clamping tool comprises a base, a lower chuck and a pressing ring. The lower chuck is installed on the base, and lace sinking grooves are formed in the top face of the lower chuck and used for containing laces of an engine rotor. The pressing ring is used for being arranged on the engine rotor in a sleeving mode and pressing laces of the engine rotor. And a plurality of screws sequentially penetrate through the pressing ring and the lower chuck from top to bottom and then are screwed on the base. By the adoption of the clamping tool and method, the problem that a three-jaw chuck is used for directly clamping the lace of the engine rotor in an existing clamping method is solved.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft engine detection tooling, and in particular to a clamping tooling and method for an engine rotor, which is used as a rotating clamping tooling during an automatic eddy current detection process of an aircraft engine rotor. Background Art

[0002] In the process of automatic eddy current testing of engine rotors, in order to improve the testing efficiency, the engine rotor needs to be rotated. The conventional clamping method uses a three-jaw chuck to fix the engine rotor. The following problems exist when using a three-jaw chuck to fix the engine rotor:

[0003] (1) The bottom of the engine rotor has a flange edge, which is difficult to clamp with a three-jaw chuck.

[0004] (2) Since the jaws on the three-jaw chuck are made of metal, it is very easy to cause knocks, collisions, and scratches on the edges of the engine rotor during the clamping and rotation process, affecting product quality.

[0005] (3) When using a three-jaw chuck for clamping, in order to avoid clamping the engine rotor, the three-jaw chuck uses a smaller clamping force, which makes it easy for the engine rotor and the chuck to have relative displacement, resulting in invalid detection during the detection process and even damage to the automatic detection system and the engine rotor.

[0006] Therefore, it is necessary to propose a clamping tool and method for an engine rotor for automatic eddy current detection of the engine rotor. Summary of the invention

[0007] The main purpose of the present invention is to provide a clamping tool and method for an engine rotor, aiming to solve the above technical problems.

[0008] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a clamping tool for an engine rotor, comprising a base, a lower chuck and a pressure ring; the lower chuck is installed on the base, and a lace groove is provided on the top surface of the lower chuck, and the lace groove is used to accommodate the lace of the engine rotor; the pressure ring is used to be sleeved on the engine rotor and press the lace of the engine rotor; a plurality of screws pass through the pressure ring and the lower chuck in sequence from top to bottom and are screwed on the base.

[0009] Preferably, the clamping tool also includes a pin, and a pin hole is provided at the position of the lace groove corresponding to each lace tooth, the pin is inserted in the pin hole, and the lower end of the pin extends downward and is inserted into the base; the upper end surface of the pin is higher than the bottom of the lace groove, and the upper end of the pin is used to be inserted into the through hole of the lace of the engine rotor.

[0010] Preferably, the base is made of aluminum alloy, and the lower chuck, pressure ring and pin are all made of plastic steel.

[0011] Preferably, the pressure ring is a half structure, including a first half ring body and a second half ring body; the first half ring body and the second half ring body are both half ring structures, which are spliced ​​together to form a whole ring and embrace the engine rotor.

[0012] Preferably, a rectangular groove is provided on the top surface of the base, and the lower chuck is installed in the rectangular groove.

[0013] Preferably, the lower chuck is in a rectangular shape with arc-shaped chamfers at four corners; the four side surfaces of the lower chuck are in contact with and cooperate with the four side walls of the rectangular sink respectively.

[0014] Preferably, the depth of the rectangular groove is at least 0.5 mm smaller than the thickness of the lower chuck; the depth of the lace groove is 0.5-0.8 mm smaller than the thickness of the lace of the engine rotor.

[0015] Preferably, the outer peripheral surface of the base is a cylindrical surface.

[0016] On the other hand, the present invention also provides a method for clamping an engine rotor, using the above-mentioned clamping tool, comprising the following steps:

[0017] S1. Install the lower chuck on the base;

[0018] S2. Place the lace of the engine rotor into the lace sink groove of the lower chuck;

[0019] S3, putting the pressing ring on the engine rotor and pressing it on the lace of the engine rotor;

[0020] S4, use multiple screws to pass through the pressure ring and the lower chuck from top to bottom in sequence, then screw them onto the base and tighten the screws;

[0021] S5. Clamp the engine rotor with the clamping tool on the three-jaw chuck. The clamping jaws of the three-jaw chuck are clamped on the outer peripheral surface of the base to complete the clamping of the engine rotor.

[0022] In step S2, after the lace of the engine rotor is placed into the lace groove of the lower chuck, a pin is inserted into the through hole of the lace, and the pin passes through the lower chuck and is inserted into the base, with the upper end of the pin inserted into the through hole of the lace.

[0023] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0024] (1) By adopting the clamping tool provided by the present invention, when in use, the lower chuck is installed on the base, and then the lace of the engine rotor is placed in the lace groove of the lower chuck, and then the pressure ring is set on the engine rotor and pressed on the lace of the engine rotor; finally, a plurality of screws are used to pass through the pressure ring and the lower chuck from top to bottom in sequence, and then screwed on the base, and the screws are tightened; the engine rotor with the clamping tool is clamped together on the three-jaw chuck, and the claws of the three-jaw chuck are clamped on the outer peripheral surface of the base, so that the clamping of the engine rotor can be completed.

[0025] (2) By adopting the clamping method provided by the present invention, the clamping claws of the three-jaw chuck are clamped on the outer peripheral surface of the base, which overcomes the problem of the existing clamping method of using the three-jaw chuck to directly clamp on the lace of the engine rotor. It avoids causing knocks, collisions, and scratches on the lace of the engine rotor. Since the three-jaw chuck can be directly clamped on the outer peripheral surface of the base, it can be clamped with a larger clamping force, further ensuring the stability of the clamping.

[0026] (3) The present invention can effectively improve the stability of the engine rotor during the automatic eddy current detection rotation process, and improve the safety of the engine rotor during the clamping process, thereby ensuring the accuracy of the engine rotor during the rotation process and avoiding damage to the engine rotor during the automatic eddy current detection process.

[0027] (4) In the present invention, the lower chuck, the pressure ring and the pin are all made of plastic steel, which effectively prevents the lace of the engine rotor from being pinched.

[0028] (5) In the present invention, since the base and the lower chuck adopt a split structure, when clamping an engine rotor with different lace shapes, it is only necessary to replace the lower chuck with the corresponding lace groove shape, and other parts on the clamping tooling do not need to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 An exploded view of the clamping fixture and the engine rotor provided by the present invention;

[0031] Figure 2 This is a schematic diagram of the clamping tool provided by the present invention after clamping the engine rotor.

[0032] Explanation of the accompanying drawings: 1. Base; 1a. Rectangular groove; 2. Lower chuck; 2a. Lace groove; 2b. Pin hole; 3. Pressing ring; 3a. First half ring body; 3b. Second half ring body; 4. Pin; 5. Screw; 6. Engine rotor; 6a. Lace. DETAILED DESCRIPTION

[0033] 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.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] Combination Figure 1 As shown, a clamping tool for an engine rotor comprises a base 1, a lower chuck 2 and a pressure ring 3; the lower chuck 2 is installed on the base 1, and a lace sink groove 2a is provided on the top surface of the lower chuck 2, and the lace sink groove 2a is used to accommodate the lace 6a of the engine rotor 6; the pressure ring 3 is used to be sleeved on the engine rotor 6 and press the lace 6a of the engine rotor 6; a plurality of screws 5 pass through the pressure ring 3 and the lower chuck 2 in sequence from top to bottom and are screwed on the base 1.

[0037] Furthermore, the clamping tool also includes a pin 4, and a pin hole 2b is provided at the position of the lace groove 2a corresponding to each lace tooth, the pin 4 is inserted in the pin hole 2b, and the lower end of the pin 4 extends downward and is inserted into the base 1; the upper end surface of the pin 4 is higher than the bottom of the lace groove 2a, and the upper end of the pin 4 is used to be inserted into the through hole of the lace 6a of the engine rotor 6.

[0038] In this embodiment, the base 1 is made of aluminum alloy, which can ensure the tightness of the connection with the screw 5. The lower chuck 2, the pressure ring 3 and the pin 4 are all made of plastic steel. The main purpose of using plastic steel is to protect the engine rotor and prevent the lace of the engine rotor from being pinched.

[0039] Combination Figure 1 , Figure 2 As shown, the pressure ring 3 is a half structure, including a first half ring body 3a and a second half ring body 3b; the first half ring body 3a and the second half ring body 3b are both half ring structures, which are spliced ​​to form a full ring and surround the engine rotor 6. The two half ring structures are used to facilitate the installation of the pressure ring 3.

[0040] Combination Figure 1 As shown, a rectangular sink 1a is provided on the top surface of the base 1, and the lower chuck 2 is installed in the rectangular sink 1a. The use of the rectangular sink 1a to install the lower chuck 2 can make the clamping tooling structure more compact. Further, the lower chuck 2 is a rectangular shape with arc chamfers at four corners; the four sides of the lower chuck 2 are respectively in contact with the four side walls of the rectangular sink 1a. The four side walls of the rectangular sink 1a form a limiting effect on the lower chuck 2 to prevent the lower chuck 2 from rotating. In this embodiment, in order to prevent the lower chuck 2 from moving up and down in the rectangular sink 1a, the depth of the rectangular sink 1a is required to be at least 0.5mm less than the thickness of the lower chuck 2. Similarly, in order to prevent the lace 6a of the engine rotor 6 from moving up and down in the lace sink 2a, the depth of the lace sink 2a is required to be 0.5-0.8mm less than the thickness of the lace 6a of the engine rotor 6.

[0041] In order to facilitate the clamping of the jaws of the three-jaw chuck on the outer peripheral surface of the base 1, the outer peripheral surface of the base 1 is set to a cylindrical surface.

[0042] On the other hand, combined Figure 2 As shown, this embodiment provides a method for clamping an engine rotor, using the above-mentioned clamping tool, including the following steps:

[0043] S1. Install the lower chuck 2 on the base 1; specifically, install the lower chuck 2 in the rectangular sink 1a of the base 1.

[0044] S2, put the lace 6a of the engine rotor 6 into the lace sink 2a of the lower chuck 2. Insert the pin 4 into the through hole of the lace 6a, and insert the pin 4 into the base 1 after passing through the lower chuck 2, and the upper end of the pin 4 is inserted into the through hole of the lace 6a.

[0045] S3, sleeve the pressure ring 3 on the engine rotor 6, and press it on the lace 6a of the engine rotor 6.

[0046] S4. Use multiple screws 5 to pass through the pressure ring 3 and the lower chuck 2 from top to bottom in sequence, then screw them onto the base 1 and tighten the screws 5.

[0047] S5. Clamp the engine rotor 6 with the clamping tool on the three-jaw chuck. The clamping jaws of the three-jaw chuck are clamped on the outer peripheral surface of the base 1 to complete the clamping of the engine rotor 6.

[0048] After clamping is completed, the engine rotor can be automatically eddy current tested.

[0049] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A clamping tool for an engine rotor, characterized in that: The invention comprises a base (1), a lower chuck (2) and a pressure ring (3); the lower chuck (2) is mounted on the base (1), a lace recess (2a) is provided on the top surface of the lower chuck (2), and the lace recess (2a) is used to accommodate the lace (6a) of the engine rotor (6); the pressure ring (3) is used to be sleeved on the engine rotor (6) and to press the lace (6a) of the engine rotor (6); a plurality of screws (5) pass through the pressure ring (3) and the lower chuck (2) in sequence from top to bottom and are then screwed onto the base (1).

2. The clamping tool for an engine rotor according to claim 1, characterized in that: It also includes a pin (4), a pin hole (2b) is provided at a position of the lace groove (2a) corresponding to each lace tooth, the pin (4) is inserted into the pin hole (2b), and the lower end of the pin (4) extends downward and is inserted into the base (1); the upper end surface of the pin (4) is higher than the bottom of the lace groove (2a), and the upper end of the pin (4) is used to be inserted into the through hole of the lace (6a) of the engine rotor (6).

3. The clamping tool for an engine rotor as claimed in claim 2, characterized in that: The base (1) is made of aluminum alloy, and the lower chuck (2), the pressure ring (3) and the pin (4) are all made of plastic steel.

4. The clamping tool for an engine rotor according to claim 1, characterized in that: The pressure ring (3) is a half-structure, comprising a first half-ring body (3a) and a second half-ring body (3b); the first half-ring body (3a) and the second half-ring body (3b) are both half-ring structures, which are spliced ​​to form a full ring and surround the engine rotor (6).

5. The clamping tool for an engine rotor according to claim 1, characterized in that: A rectangular recessed groove (1a) is provided on the top surface of the base (1), and the lower chuck (2) is installed in the rectangular recessed groove (1a).

6. The clamping tool for an engine rotor as claimed in claim 5, characterized in that: The lower chuck (2) is in a rectangular shape with arc-shaped chamfers at four corners; the four side surfaces of the lower chuck (2) are respectively in contact with and matched with the four side walls of the rectangular sink (1a).

7. The clamping tool for an engine rotor as claimed in claim 5, characterized in that: The depth of the rectangular groove (1a) is at least 0.5 mm less than the thickness of the lower chuck (2); the depth of the lace groove (2a) is 0.5-0.8 mm less than the thickness of the lace (6a) of the engine rotor (6).

8. The clamping tool for an engine rotor as claimed in claim 1, characterized in that: The outer peripheral surface of the base (1) is a cylindrical surface.

9. A method for clamping an engine rotor, characterized in that: The clamping tool according to any one of claims 1 to 8 comprises the following steps: S1, installing the lower chuck (2) on the base (1); S2, placing the lace (6a) of the engine rotor (6) into the lace sink groove (2a) of the lower chuck (2); S3, sleeve the pressure ring (3) on the engine rotor (6), and press it on the lace (6a) of the engine rotor (6); S4, using a plurality of screws (5) to pass through the pressure ring (3) and the lower chuck (2) in sequence from top to bottom, and then screwing them onto the base (1), and tightening the screws (5); S5. The engine rotor (6) with the clamping tool is clamped together on the three-jaw chuck, and the clamping claws of the three-jaw chuck are clamped on the outer peripheral surface of the base (1), thereby completing the clamping of the engine rotor (6).

10. The method for clamping an engine rotor as claimed in claim 9, characterized in that: In step S2, after the lace (6a) of the engine rotor (6) is placed in the lace sink groove (2a) of the lower chuck (2), a pin (4) is inserted into the through hole of the lace (6a), and the pin (4) passes through the lower chuck (2) and is inserted into the base (1), and the upper end of the pin (4) is inserted into the through hole of the lace (6a).

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