Angular positioning device for blade body molded surface of journal type blade

Abstract

The utility model relates to the technical field of aero-engine blade machining, in particular to an angular positioning device for a shaft neck type blade body molded surface, which comprises a positioning block, a first angular positioning pin and a second angular positioning pin which are arranged on the lower surface of the positioning block, a clamping rod and a connecting rod, the connecting rod is vertically mounted at the center position of the top surface of the positioning block; a blind hole with an open lower end is formed in the center of the clamping rod, and an elastic piece is arranged in the blind hole; the upper end of the connecting rod is inserted into the blind hole of the clamping rod in a sliding manner; the lower end of the elastic piece abuts against the top face of the connecting rod. And the clamping rod is conveniently clamped in a cutter handle of a milling main shaft of a five-axis double-drive numerical control machining center. Due to the fact that the elastic piece can be contracted, an assembly jointly formed by the connecting rod, the positioning block and the two angular positioning pins forms a floating structure in the vertical direction, then rigid collision between the angular positioning pins and the blade in the downward moving process is avoided, and the blade to be positioned is effectively protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to aero -engine blade processing technical field especially, it relates to a kind of angular orientation device of shaft neck class blade blade body profile. BACKGROUND

[0002] Aero -engine compressor stator shaft neck class blade is mainly composed of shaft neck with boss and blade body two parts, and the commonly used material is titanium alloy and high-temperature alloy. The shaft neck is used to cooperate with rocker arm. The function of the compressor stator shaft neck class blade is to adjust airflow direction to ensure the best inlet angle, so that the rotor blade works efficiently.

[0003] In combination Figure 1 As shown in the figure, in the process of shaft neck class blade blade body profile processing, standard tool bar is often used for single-point angular orientation, and this angular orientation scheme has two problems: (1) when the positioning surface has different allowance groups, the angular orientation is inaccurate, which easily causes product scrap; (2) when the product needs to be milled in multiple times to reach the finished product size, the problem is similar to problem (1).

[0004] Based on the above problems, for the angular orientation of the shaft neck class blade, two angular orientation pins are often used to determine the angular orientation of the blade. For example, the patent application with publication number CN115790478A discloses a fixture for detecting profile parameters of a double-shaft neck rectification blade using three coordinates and a detection method. When angular orientation is performed, the pre-positioning assembly composed of the first angular orientation pin, the second angular orientation pin and the angular orientation block is slid in the plane perpendicular to the hydraulic tool holder axis until the ends of the first angular orientation pin and the second angular orientation pin contact the double-shaft neck rectification blade profile, and the angular orientation of the blade can be determined.

[0005] However, when a five-axis double-drive numerical control machining center is used to process the shaft neck class blade blade body profile, the pre-positioning assembly composed of the first angular orientation pin, the second angular orientation pin and the angular orientation block in the prior art CN115790478A is not convenient to install on the tool holder of the milling spindle of the five-axis double-drive numerical control machining center. In addition, if the pre-positioning assembly in the prior art is directly installed on the milling spindle of the five-axis double-drive numerical control machining center, when positioning is performed, the milling spindle drives the pre-positioning assembly to move for positioning. Since the pre-positioning assembly and the milling spindle are rigidly connected, the angular orientation pin is easily subjected to rigid collision with the blade during the downward movement of the angular orientation pin during positioning, which may damage the blade. UTILITY MODEL CONTENTS

[0006] The main purpose of the utility model is to provide an angular orientation device for the blade body profile of a shaft neck class blade, which aims to solve the above technical problems.

[0007] In order to achieve the above object, the utility model provides a kind of angular positioning device of shaft journal type blade blade profile, including positioning block and first angular positioning pin and second angular positioning pin installed on the lower surface of the positioning block, further including clamping rod and connecting rod;The connecting rod is vertically installed at the top surface center position of the positioning block;Blind hole of lower end open is provided in the center of the clamping rod, and elastic member is provided in blind hole;The upper end of the connecting rod is slidably inserted in the blind hole of the clamping rod;The upper end of the elastic member is abutted to the top wall of blind hole, and the lower end is abutted on the top surface of the connecting rod.

[0008] Preferably, anti-drop structure is provided between the clamping rod and the connecting rod, to prevent the connecting rod from falling out of the blind hole.

[0009] Preferably, the anti-drop structure includes pin body inserted transversely on the upper part of the connecting rod, and the waist-shaped hole provided on the side wall of the clamping rod;Both ends of the pin body are respectively inserted in the waist-shaped hole, and the outer cylindrical surface of the pin body is in sliding fit with the inner wall of the waist-shaped hole.

[0010] Preferably, the elastic member is a spring.

[0011] Preferably, the end of the lower end of the first angular positioning pin and the second angular positioning pin is hemispherical head shape.

[0012] Preferably, the height difference B of the ball center of the hemispherical head of the lower end of the first angular positioning pin and the second angular positioning pin is ±0.01mm.

[0013] Preferably, the axis of the connecting rod, the first angular positioning pin and the second angular positioning pin is parallel to each other, and the axis of the three is coplanar;The axis of the first angular positioning pin and the second angular positioning pin is located on both sides of the axis of the connecting rod.

[0014] Preferably, the positioning block is a quadrangular prism with rectangular cross section;Two long sides of the positioning block are parallel to the plane where the axis of the connecting rod, the first angular positioning pin and the second angular positioning pin is located;And the plane where the axis of the connecting rod, the first angular positioning pin and the second angular positioning pin is located is the symmetry center plane of the two long sides of the positioning block.

[0015] Due to the adoption of the above technical scheme, the utility model has the following beneficial effects:

[0016] (1) By adopting the angular positioning device provided by the utility model, when in use, the clamping rod is conveniently clamped in the cutter handle of the milling spindle of the five-axis double-drive numerical control machining center. In addition, the elastic member is arranged in the blind hole of the clamping rod, and the upper end of the connecting rod is slidingly inserted in the blind hole of the clamping rod, so that the assembly formed by the connecting rod, the positioning block and the two angular positioning pins forms a floating structure in the vertical direction. When the vane is angularly positioned, the milling spindle of the machining center drives the entire angular positioning device to move downward, so that when the first angular positioning pin and the second angular positioning pin abut against the vane to be positioned, the elastic member can be contracted under the action of the vertical jacking force, thereby avoiding rigid collision between the angular positioning pin and the vane during downward movement of the angular positioning pin, and effectively protecting the vane to be positioned.

[0017] (2) In the utility model, by setting the elastic member, when positioning, the elastic member can play a buffering role, avoiding rigid collision between the angular positioning pin and the vane during downward movement of the angular positioning pin, and under the action of the elastic force of the elastic member, the first angular positioning pin and the second angular positioning pin can be tightly abutted against the vane to be positioned, ensuring the reliability of positioning. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in these drawings without creative labor.

[0019] Figure 1 It is a schematic diagram for angular positioning of the shaft neck type vane using a standard cutter bar;

[0020] Figure 2 It is a perspective view of the angular positioning device provided by the utility model;

[0021] Figure 3 It is a main sectional view of the angular positioning device provided by the utility model;

[0022] Figure 4 It is a left view of the angular positioning device provided by the utility model;

[0023] Figure 5 It is a sectional view of the clamping rod in the utility model;

[0024] Figure 6 It is a schematic diagram when positioning by using the angular positioning device provided by the utility model;

[0025] Figure 7The schematic view of the angle positioning device cooperating with the blade during positioning is shown.

[0026] Explanation of reference numerals: 1, positioning block; 2, first angle positioning pin; 3, second angle positioning pin; 4, clamping rod; 4a, blind hole; 4b, waist-shaped hole; 5, connecting rod; 6, elastic member; 7, pin body. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0029] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0030] In combination Figures 2 to 5 As shown in the drawings, an angle positioning device for a blade body surface of a shaft journal type blade comprises a positioning block 1, a first angle positioning pin 2 and a second angle positioning pin 3 installed on the lower surface of the positioning block 1, and a clamping rod 4 and a connecting rod 5; the connecting rod 5 is vertically installed at the center position of the top surface of the positioning block 1; a blind hole 4a with an open lower end is arranged at the center of the clamping rod 4, and an elastic member 6 is arranged in the blind hole 4a; the upper end of the connecting rod 5 is slidingly inserted into the blind hole 4a of the clamping rod 4; the upper end of the elastic member 6 abuts against the top wall of the blind hole 4a, and the lower end abuts against the top surface of the connecting rod 5.

[0031] In combination Figure 6As shown, when the shaft neck type blade is angularly positioned, the shaft necks at both ends of the shaft neck type blade are respectively installed in the clamping seat (the clamping seat can be a hydraulic tool holder) of the A-axis of the five-axis double-drive numerical control machining center, and the angular positioning device is clamped in the tool holder of the milling spindle of the five-axis double-drive numerical control machining center through the clamping rod 4. Since the elastic member 6 is arranged in the blind hole 4a of the clamping rod 4, and the upper end of the connecting rod 5 is slidingly inserted in the blind hole 4a of the clamping rod 4, the assembly formed by the connecting rod 5, the positioning block 1 and the two angular positioning pins forms a floating structure in the vertical direction. When the blade is angularly positioned, the milling spindle of the machining center drives the entire angular positioning device to move downward, so that when the first angular positioning pin 2 and the second angular positioning pin 3 abut against the blade to be positioned, the elastic member 6 can be contracted under the action of the vertical jacking force, thereby avoiding rigid collision between the two angular positioning pins and the blade during the downward movement of the two angular positioning pins, and effectively protecting the blade to be positioned. In addition, under the action of the elastic force of the elastic member 6, the first angular positioning pin 2 and the second angular positioning pin 3 can be tightly abutted against the blade to be positioned.

[0032] In combination with Figure 2 , Figure 3 As shown, a anti-falling structure is arranged between the clamping rod 4 and the connecting rod 5, for preventing the connecting rod 5 from falling out of the blind hole 4a. Specifically, the elastic member 6 is a spring, the anti-falling structure includes a pin body 7 transversely inserted on the upper part of the connecting rod 5, and a waist-shaped hole 4b arranged on the side wall of the clamping rod 4; the two ends of the pin body 7 are respectively inserted in the waist-shaped hole 4b, and the outer cylindrical surface of the pin body 7 is slidingly matched with the inner wall of the waist-shaped hole 4b. By using the sliding matching of the pin body 7 and the waist-shaped hole 4b, the connecting rod 5 can be prevented from falling out of the blind hole 4a.

[0033] In combination with Figure 3 and Figure 7 As shown, the end heads of the lower ends of the first angular positioning pin 2 and the second angular positioning pin 3 are respectively in the shape of a hemispherical head. By using the hemispherical head to contact the blade, point contact can be approximately achieved, and the contact area is reduced. Further, the height difference B of the centers of the hemispherical heads of the lower ends of the first angular positioning pin 2 and the second angular positioning pin 3 is ±0.01mm in accuracy, and the progress of the height difference is controlled to further ensure the progress of the angular positioning. Further, the spacing A between the center axes of the first angular positioning pin 2 and the second angular positioning pin 3 is ±0.01mm in accuracy.

[0034] In combination with Figure 2 As shown, the axes of the connecting rod 5, the first angular positioning pin 2 and the second angular positioning pin 3 are parallel to each other and coplanar, and the axes of the first angular positioning pin 2 and the second angular positioning pin 3 are located on both sides of the axis of the connecting rod 5. Specifically, Figure 3The central axis F is the axis of the connecting rod 5, the axis D is the axis of the first angular positioning pin 2, and the axis E is the axis of the second angular positioning pin 3. The axis F, the axis D and the axis E are parallel to each other, and the axis F, the axis D and the axis E are on the same plane. The axis D and the axis E are located on two sides of the axis F.

[0035] In combination Figure 2 And Figure 4 As shown in the figure, the positioning block 1 is a quadrangular prism with a rectangular cross section; two long sides of the positioning block 1 are parallel to the plane in which the axes of the connecting rod 5, the first angular positioning pin 2 and the second angular positioning pin 3 are located. Specifically, the plane in which the axis F, the axis D and the axis E are located is C, and the two long sides of the positioning block 1 are plane G and plane H respectively; the plane G and the plane H are parallel to the plane C. When positioning, the plane C is the center plane of the plane G and the plane H. When angularly positioning the blade, the center plane in which the axes of the connecting rod 5, the first angular positioning pin 2 and the second angular positioning pin 3 are located can be found by aligning the two long sides of the positioning block 1.

[0036] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application. Any equivalent structural transformation or direct / indirect application in other related technical fields within the concept of the present application, as described in the present application and the attached drawings, is included in the patent protection range of the present application.

Claims

1. An angular positioning device for the blade profile of a journal-type blade, comprising a positioning block (1) and a first angular positioning pin (2) and a second angular positioning pin (3) mounted on the lower surface of the positioning block (1), characterized in that, It also includes a clamping rod (4) and a connecting rod (5); The connecting rod (5) is vertically installed at the center of the top surface of the positioning block (1); A blind hole (4a) with an open lower end is provided at the center of the clamping rod (4), and an elastic element (6) is provided in the blind hole (4a); The upper end of the connecting rod (5) is slidably inserted into the blind hole (4a) of the clamping rod (4); The upper end of the elastic element (6) abuts against the top wall of the blind hole (4a), and the lower end abuts against the top surface of the connecting rod (5).

2. The angular positioning device for the blade profile of a journal-type blade as described in claim 1, characterized in that, An anti-detachment structure is provided between the clamping rod (4) and the connecting rod (5) to prevent the connecting rod (5) from falling out of the blind hole (4a).

3. The angular positioning device for the blade profile of a journal-type blade as described in claim 2, characterized in that, The anti-detachment structure includes a pin (7) inserted laterally into the upper part of the connecting rod (5) and a waist-shaped hole (4b) provided on the side wall of the clamping rod (4); the two ends of the pin (7) are respectively inserted into the waist-shaped hole (4b), and the outer cylindrical surface of the pin (7) slides in fit with the inner wall of the waist-shaped hole (4b).

4. The angular positioning device for the blade profile of a journal-type blade as described in claim 1, characterized in that, The elastic element (6) is a spring.

5. The angular positioning device for the blade profile of a journal-type blade as described in claim 1, characterized in that, The lower ends of the first angular positioning pin (2) and the second angular positioning pin (3) are respectively hemispherical.

6. The angular positioning device for the blade profile of a journal-type blade as described in claim 5, characterized in that, The height difference between the center of the lower hemisphere of the first angular positioning pin (2) and the second angular positioning pin (3) is B, and the accuracy of the height difference B is ±0.01mm.

7. The angular positioning device for the blade profile of a journal-type blade as described in claim 1, characterized in that, The axes of the connecting rod (5), the first angular positioning pin (2), and the second angular positioning pin (3) are parallel to each other and are coplanar; the axes of the first angular positioning pin (2) and the second angular positioning pin (3) are located on both sides of the axis of the connecting rod (5).

8. The angular positioning device for the blade profile of a journal-type blade as described in claim 7, characterized in that, The positioning block (1) is a quadrangular prism with a rectangular cross-section; the two long sides of the positioning block (1) are parallel to the plane containing the axes of the connecting rod (5), the first angular positioning pin (2), and the second angular positioning pin (3); and the plane containing the axes of the connecting rod (5), the first angular positioning pin (2), and the second angular positioning pin (3) is the symmetrical center plane of the two long sides of the positioning block (1).

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