Cascade detection positioning clamp

Abstract

The invention discloses a blade grid detecting and positioning clamp which comprises a fixing frame, the fixing frame is composed of a cross beam and two vertical supporting stand columns, the cross beam of the fixing frame is provided with a pair of supporting stand columns, the first supporting stand column on one side of the fixing frame is provided with a fixing V-shaped block, and the second supporting stand column on the other side of the fixing frame is provided with a U-shaped supporting seat. The U-shaped supporting seat is connected with a V-shaped block, and a longitudinal supporting block is further arranged at the bottom of the cross beam of the fixed frame. The structure is simple, universality is high, operation is easy and convenient, blade cascade repeated positioning can be achieved, working efficiency is improved, and labor intensity is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of geometrical dimension detection, and in particular relates to a blade cascade detection positioning fixture. Background Art

[0002] Generally, random inspection of composite blades only needs to inspect key dimensions such as the position of the installation side holes, and does not inspect the surface dimensions of the blade grid. However, as the requirements increase, it is necessary to inspect the composite blades in full size according to the three-dimensional digital model to ensure that the reverse thrust value of the reverse thrust device meets the requirements.

[0003] At present, contact type three-coordinate measuring machine is generally used to detect blades, and the blade detection positioning is fixed by a simple positioning fixture assembled with V-blocks or three-coordinate auxiliary positioning plates and positioning piles (such as Figure 1 The disadvantage of this measurement method and fixing method is that the contact type three-dimensional coordinate measuring machine can only measure one scanning line in the blade grid, the detection data is incomplete, and it takes more than 22 hours to compile a detection program for one blade grid, and more than 4 hours to detect one blade in the subsequent program. The programming and program detection time is long. The position difference of the simple combination fixture is large after replacing the new blade grid, and it is impossible to achieve repeated positioning measurement.

[0004] The Chinese invention patent with the opening number CN104084814B discloses a method and fixture for rapid clamping and alignment of the arc segment of the stationary blade cascade during milling. The method uses the principle of "three points form a surface" and realizes rapid clamping and alignment of the arc segment of the stationary blade cascade through three-point positioning and three-point auxiliary support. It is convenient to adjust and easy to operate during the application process, and has a wide range of applications. It overcomes the large number of specifications of the arc segment of the stationary blade cascade, and its arc segment structure makes it difficult to ensure the positioning accuracy of the arc surface of the stationary blade cascade arc segment in actual processing. At the same time, the conventional clamping and alignment device has the disadvantage of low versatility, which improves the alignment efficiency and accuracy. At the same time, the corresponding clamping and alignment fixture in this method adopts a modular design concept, which greatly improves the versatility of the device, and is convenient and flexible to operate. This scheme is aimed at the clamping in the milling process, and the clamping requirements cannot meet the requirements in the detection process proposed by the present invention. Summary of the invention

[0005] In order to solve the above problems, the present invention aims to provide a blade detection and positioning fixture.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a blade detection and positioning fixture, including a fixed frame, the fixed frame is composed of a crossbeam and two vertical supporting columns, a pair of supporting columns are arranged on the crossbeam of the fixed frame, a fixed V-shaped block is arranged on the first supporting column on one side of the fixed frame, and a U-shaped supporting seat is arranged on the second supporting column on the other side, the U-shaped supporting seat is connected to the V-shaped block, and a longitudinal support block is also arranged at the bottom of the crossbeam of the fixed frame.

[0007] Preferably, the middle part of the cross beam of the fixed frame is a hollow structure, a groove is provided on the longitudinal support block, the longitudinal support block is vertically arranged with the cross beam, and the longitudinal support block is connected to the lower end of the hollow structure through a stud.

[0008] Preferably, a pair of fixed V-shaped blocks are vertically arranged on the inner end surface of the first supporting column.

[0009] Preferably, the support column is composed of two sections, which are connected by a nut, and the height of the support column is adjusted by the nut.

[0010] Preferably, a waist-shaped hole is opened on the U-shaped support seat, and the two U-shaped support seats are fixedly clamped on the second support column by bolts. The bolts pass through the waist-shaped holes of the U-shaped support seat, and the U-shaped support seat is adjusted to slide on the second support column by the bolts.

[0011] Preferably, the top ends of the two U-shaped support seats are connected by a screw rod, one end of which is provided with an adjustable V-shaped block, the adjustable V-shaped block is opposite to the fixed V-shaped block, and the adjusting screw rod allows the adjustable V-shaped block to be extended and retracted.

[0012] Preferably, the fixed V-block, the supporting column and the adjustable V-block are all wrapped with anti-collision tape.

[0013] Compared with the prior art, the present invention has the following advantages: a composite material blade grid detection and positioning fixture adopts an adjustable frame structure, which can realize the measurement of the blade grid from both the forward and reverse directions. The frame size is adjusted by a screw structure to achieve repeated positioning of multiple models of composite material blade grids. It has a simple structure and low assembly cost, which improves the blade grid detection efficiency and reduces labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments 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 these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of a composite material cascade detection and positioning fixture in the present invention;

[0016] Figure 2 Schematic diagram of the composite blade cascade clamped by the detection and positioning fixture of the present invention Figure 1 ;

[0017] Figure 3 Schematic diagram of the composite blade cascade clamped by the detection and positioning fixture of the present invention Figure 2 ;

[0018] In the figure, 1-longitudinal support block; 2-fixed frame; 3-support column; 4-nut; 5-first support column; 6-fixed V-block; 7-second support column; 8-U-shaped support seat; 9-bolt; 10-V-block. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0020] Reference Figure 1 A composite material blade detection and positioning fixture, a longitudinal support block 1 is installed at the bottom of the crossbeam of the fixed frame 2, which is used to raise the blade clamping height and stabilize the fixture. Two support columns 3 are installed above the crossbeam of the fixed frame 2 to support the stability of the blade. The support column 3 can adjust the column height through the nut 4, and the top of the column is wrapped with anti-collision tape to prevent the blade from being bumped. Two fixed V-shaped blocks 6 are installed on the first support column 5 of the fixed frame 2 to stabilize the installation edge of the left blade. The V-shaped block is wrapped with anti-collision tape to prevent the blade from being bumped. A U-shaped support seat 8 is installed on the second supporting column 7 of the fixed frame 2. The height of the U-shaped support seat 8 can be adjusted by a bolt 9. An adjustable V-shaped block 10 is installed on the U-shaped support seat 8. The adjustable V-shaped block 10 fixes the right blade installation edge through a screw 11 to stabilize the V-shaped block to prevent the blade from being bumped and damaged. At the same time, the U-shaped support seat 8 and the adjustable V-shaped block 10 can be used to fix the position of the parts to prevent the V-shaped block 10 from blocking the installation edge hole.

[0021] Reference Figure 2 and Figure 3 , Clamping process of blade grid: When clamping the blade grid, first adjust the V-block 10 to the rightmost position to prevent scratching of parts, and loosen the bolt 9 to make the U-shaped support seat 8 in a free state. Fix the left mounting edge of the blade grid in the V-block 6 fixed on the left side of the fixture, and then place the bottom mounting edge of the blade grid on the two supporting columns 3. Adjust the height of the blade grid by turning the nut 4, and adjust the left mounting edge of the blade grid to the appropriate position of the V-block 6 fixed on the left side of the fixture. The appropriate position is the position that does not block the mounting edge hole and is convenient for fixing. Adjust the position of the U-shaped support seat 8 so that the adjustable V-block 10 is fixed to the appropriate position of the right mounting edge of the blade grid, tighten the bolts 9 and the screw 11, and the blade grid clamping is completed.

[0022] Replacement process of blades of the same model: After the blade size detection is completed, loosen the screw 11, adjust the V-block 10 to the rightmost position, remove the blade, replace the new blade, fix the left installation edge of the blade in the fixed V-block 6 on the left side of the fixture, place the bottom installation edge of the blade on the top surface of the two supporting columns 3, fix the adjustable V-block 10 on the right installation edge of the blade, tighten the screw 11, and complete the replacement of the same model blade.

[0023] Replacement process of blades of different models: After the blade size detection is completed, loosen the screw 11, adjust the V-block 10 to the rightmost position, remove the blade, loosen the bolt 9, and replace the new blade with the U-shaped support seat 8 in a free state. Fix the left installation edge of the blade in the V-block 6 fixed on the left side of the clamp, and then place the bottom installation edge of the blade on the two support columns 3. Adjust the height of the blade by turning the nut 4, and adjust the left installation edge of the blade to the appropriate position of the V-block 6 fixed on the left side of the clamp. The appropriate position is to not block the installation edge hole position and facilitate the fixing of the blade. Adjust the position of the U-shaped support seat 8 so that the adjustable V-block 10 is fixed to the appropriate position of the right installation edge of the blade, tighten the bolt 9 and screw 11, and complete the blade replacement.

[0024] The above is a detailed introduction to a blade detection and positioning fixture provided by the present invention. This article uses specific examples to illustrate the structure and working principle of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A blade detection and positioning fixture, characterized in that: The invention comprises a fixed frame (2), wherein the fixed frame (2) is composed of a crossbeam and two vertical support columns, a pair of support columns (3) are arranged on the crossbeam of the fixed frame (2), a fixed V-shaped block (6) is arranged on a first support column (5) on one side of the fixed frame (2), a U-shaped support seat (8) is arranged on a second support column (7) on the other side, the U-shaped support seat (8) is connected to a V-shaped block (10), and a longitudinal support block (1) is also arranged at the bottom of the crossbeam of the fixed frame (2).

2. The blade detection and positioning fixture according to claim 1, characterized in that: The middle part of the crossbeam of the fixed frame (2) is a hollow structure, a groove is provided on the longitudinal support block (1), the longitudinal support block (1) is arranged perpendicular to the crossbeam, and the longitudinal support block (1) is connected to the lower end of the hollow structure through a stud.

3. The blade detection and positioning fixture according to claim 1, characterized in that: A pair of fixed V-shaped blocks (6) are vertically arranged on the inner end surface of the first supporting column (5).

4. The blade detection and positioning fixture according to claim 1, characterized in that: The supporting column (3) is composed of two sections, which are connected by a nut (4), and the height of the supporting column (3) is adjusted by the nut (4).

5. The blade detection and positioning fixture according to claim 1, characterized in that: The U-shaped support seat (8) is provided with a waist-shaped hole. The two U-shaped support seats (8) are fixedly clamped on the second support column (7) by bolts (9). The bolts (9) pass through the waist-shaped holes of the U-shaped support seat (8). The U-shaped support seat (8) is adjusted to slide on the second support column (7) by the bolts (9).

6. The blade detection and positioning fixture according to claim 1, characterized in that: The top ends of the two U-shaped support seats (8) are connected by a screw rod (11), one end of the screw rod (11) is provided with an adjustable V-shaped block (10), the adjustable V-shaped block (10) is opposite to the fixed V-shaped block (6), and the adjustable screw rod (11) allows the adjustable V-shaped block (10) to be extended and retracted.

7. The blade detection and positioning fixture according to claim 3, characterized in that: The fixed V-shaped block (6), the supporting column (3) and the adjustable V-shaped block (10) are all wrapped with anti-collision tape.

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