CN115648062A - Radian adaptability hollow blade special fixture - Google Patents

Abstract

The invention discloses a radian-adaptive hollow blade special fixture which comprises a fixture body, a semi-cylindrical adjustable clamping block, a positioning iron sheet, a cylinder, a positioning boss, a pressing block clamping assembly and a bolt. The clamp body can be connected fixedly with the digit control machine tool through location boss and bolt, the location iron sheet hugs closely in the clamp body left side through screwed connection, the cylinder passes through screwed connection and installs in the clamp body mills the boss end, the location boss is located the clamp body bottom, briquetting clamping component links to each other with the clamp body. The invention can effectively improve the processing quality and the production efficiency of the hollow blade and further promote the development of the hollow blade process.

Description

A special fixture for arc-adaptive hollow blades

technical field

The invention relates to the technical field of aeroengine blade clamps, in particular to a special clamp for arc-adaptive hollow blades.

Background technique

Advanced aero-engines are strategic high-tech products related to national military security and national economic development. They are the "crown jewels" in the high-end manufacturing field, and their processing and manufacturing capabilities are a symbol of the country's comprehensive strength. The hollow blade is the "heart" of an aero-engine, and its processing quality and precision directly affect the service performance and life of the whole machine, and are the core key to improving the manufacturing level of the engine. Ensuring that the processed blade is fixed in the correct position on the machine tool and reducing the positioning error of the blade is an important prerequisite for the adaptive machining of aviation blades. At the same time, preventing vibration and deformation during processing to ensure stable clamping is also an important basis for improving the quality and accuracy of blade processing. Therefore, there is an urgent need to solve the problem of unstable clamping caused by the different arc curvatures of the tenons of the hollow blades caused by manufacturing errors.

Contents of the invention

In order to solve the above technical problems, a special fixture for arc-adaptive hollow blades is proposed. The specific technical solutions are as follows:

A special fixture for arc-adaptive hollow blades, including a fixture body, a semi-cylindrical adjustable clamping block, a positioning iron piece, a cylinder, a positioning boss, a pressing block clamping assembly, and bolts;

The upper and lower ends of the clamp body are provided with milled bosses, and two threaded holes are drilled, so that the cylinder is installed on the front side of the milled boss with screws;

The cylinder is installed in the end of the milled boss of the clamp body by threaded connection;

Both sides of the cylinder are provided with guide rail grooves, and the semi-cylindrical adjustable clamping block is arranged on the guide rail groove, so that the semi-cylindrical adjustable clamping block can move along a fixed vertical direction under the push of the cylinder;

The positioning iron piece is connected to the side of the semi-cylindrical adjustable clamping block by screws, and is close to the left side of the clamping body;

The positioning boss is located at the bottom of the clamp body;

The upper and lower sides of the clamp body are provided with bolt holes;

The clamping assembly of the briquetting block includes a briquetting block and a hexagon socket head screw. The briquetting block is arranged in front of the clamping body, and the briquetting block is installed on the front of the clamping body through the hexagonal socket head screw, and is symmetrically distributed on the side where the tenons of the blades are set. both sides;

The semi-cylindrical adjustable clamping block is in contact with the tenon of the blade;

The clamp body clamps the positioning boss on the chuck of the CNC abrasive belt grinding machine, and the bolt holes provided on the upper and lower sides of the clamp body are connected and fixed with the grinding machine through inserting bolts.

The preferred solution of the arc-adaptive hollow blade special fixture is that the semi-cylindrical adjustable clamping block is arranged with four-stage semicircular blocks from large to small and installed on the base of the clamping block, and the four-stage semicircular blocks are respectively It is a large semicircular block of the first level, a small semicircular block of the second level, a small semicircular block of the third level and a smallest semicircular block of the fourth level;

The inner circle of the first-level large semicircle block is provided with a trapezoidal boss, and the outer circle of the second-level small semicircle block is designed to allow the boss to move along the groove structure, and the relative sliding between the semicircle blocks is realized by connecting; similarly , the inner circle of the second-level small semi-circle block is designed with a trapezoidal boss, and the outer circle of the third-level small semi-circle block is designed with a groove;

The inner circle of the third-level small semi-circular block is designed with a trapezoidal boss, and the outer circle of the fourth-level smallest semi-circular block is designed with grooves;

The semi-cylindrical adjustable clamping block has four levels of semi-circular blocks of different sizes. The radius of the first-level semi-circular block is 20mm, and the latter decreases in turn. It can be paired with two second-level semi-circular blocks, and the two second-level semi-circular blocks Displacement collisions cannot occur; the center of the second-level semicircle block moves up 2mm compared to the center of the first-level semi-circle block, and the upward movement distance of the third-level semi-circle block and the fourth-level semi-circle block decreases by 0.5mm; the fourth-level semi-circle block The block diameter is 3.2mm, and the center of circle is parallel to the center of circle of the third-level semicircle block, which is a semi-cylindrical body with a height of 10mm;

The preferred solution of the above-mentioned special fixture for hollow blades with arc adaptability is that the clamp body is a part body of a special fixture for hollow blades with arc adaptability, the length of which is 180 mm, and the middle part has a length of 100 mm and a width of 140 mm. In the space provided, the boss at the non-cylinder mounting end is chamfered at 10mm, and the remaining chamfers are 2mm.

The preferred solution of the arc-adaptive hollow blade special fixture is that the boss at the cylinder installation end of the fixture body is milled to a volume of 30mm wide, 43mm long and 10mm deep.

The preferred solution of the arc-adaptable hollow blade special fixture is that the semi-cylindrical adjustable clamping block can adapt to the tenons of blades with different arc curvatures, and realize automatic adjustment and clamping.

The preferred solution of the arc-adaptive hollow blade special fixture is that the pressing block can be deflected left and right around the hexagon socket head screw, so as to adjust the angle of the inclined plane of the tenon of the pressing blade.

The preferred solution of the arc-adaptable hollow blade special fixture is that the diameter of the guide rail groove is 2mm.

The working principle of a special fixture for arc-adaptive hollow blades. The invention uses the positioning boss at the bottom of the clamp body and the bolts on the upper and lower sides to realize clamping and fixing on the machine tool; The block clamping assembly can realize the positioning of the fixture on the hollow blade; the semi-cylindrical adjustable clamping block can adapt to the tenons of blades with different arc curvatures, and realize automatic adjustment and clamping; the semi-cylindrical adjustable clamping block can be pushed by the cylinder Automatically fit and clamp the tenon of the blade; the clamping assembly of the pressing block can prevent the possible tilt and vibration during the grinding process of the blade, and the pressing block can deflect left and right around the screw to adjust the angle of the bevel of the tenon of the pressing blade.

Beneficial effects of the present invention:

The present invention can effectively solve the problem that general fixtures cannot adapt to the tenons of hollow blades with different arc curvatures due to manufacturing errors, and can effectively solve the processing quality of hollow blades caused by the problems of low positioning accuracy and unstable clamping of hollow blades. And low precision, long processing time and other problems, can effectively improve the processing quality and production efficiency of hollow blades;

The invention can quickly and effectively position and automatically clamp the hollow blade, and fix it on the machine tool. At the same time, it can realize the self-adaptive clamping of the tenons of blades with different arc curvatures, shorten the installation and clamping time of the hollow blade, and ensure the hollow blade. The stability of blade grinding improves the processing efficiency. At the same time, a special fixture for hollow blades with radian adaptability has good versatility and can be installed on corresponding machine tools.

Description of drawings

Fig. 1 is a schematic structural diagram of a special fixture for a radian-adaptive hollow blade;

Fig. 2 is a side view of a special fixture for arc-adaptive hollow blades;

Fig. 3 is the structural schematic diagram of folder body;

Fig. 4 is a schematic structural diagram of a semi-cylindrical adjustable clamping block;

Fig. 5 is the front view of the semi-cylindrical adjustable clamping block;

Fig. 6 is a view of Fig. 5A-A;

Fig. 7 is a schematic diagram of the connection between the clip body and the cylinder.

In the figure: 1-clamp body, 2-semi-cylindrical adjustable clamping block, 3-positioning iron piece, 4-cylinder, 5-positioning boss, 6-compression clamping assembly, 7-bolt, 8-pressure block , 9- hexagon socket countersunk head screw, 10-clamping block base, 11-first-level large semicircular block, 12-second-level cylindrical block, 13-third-level cylindrical block, 14-fourth-level cylindrical block

Detailed ways

The present invention will be described in further detail below in conjunction with accompanying drawings 1-7 and embodiments.

A special fixture for arc-adaptive hollow blades, the specific technical scheme is as follows:

A special fixture for arc-adaptive hollow blades, including a clamp body 1, a semi-cylindrical adjustable clamping block 2, a positioning iron piece 3, a cylinder 4, a positioning boss 5, a pressing block clamping assembly 6 and a bolt 7;

The upper and lower ends of the clamp body 1 are provided with milled bosses, and two threaded holes are drilled, so that the cylinder is installed on the front side of the milled boss with screws;

The cylinder 4 is installed in the end of the milled boss of the clamp body 1 by threaded connection;

Both sides of the cylinder 4 are provided with guide rail grooves, and the semi-cylindrical adjustable clamping block is arranged on the guide rail groove, so that the semi-cylindrical adjustable clamping block 2 can move along a fixed vertical direction under the push of the cylinder 4;

The positioning iron sheet 3 is connected to the side of the semi-cylindrical adjustable clamping block by screws, and is close to the left side of the clamping body 1;

The positioning boss 5 is located at the bottom of the clamp body 1;

The upper and lower sides of the clamp body 1 are provided with bolt holes;

The briquetting block clamping assembly 6 includes a briquetting block 8 and a hexagon socket head screw 9, the briquetting block 8 is arranged in front of the clamp body 1, and the briquetting block is installed on the front of the clamp body 1 by the hexagon socket head screw 9, and Symmetrically distributed on both sides of the blade tenons;

The semi-cylindrical adjustable clamping block 2 is in contact with the tenon of the blade;

The clamp body 1 clamps the positioning boss 5 on the chuck of the CNC abrasive belt grinding machine, and the bolt holes provided on the upper and lower sides of the clamp body 1 are connected and fixed with the grinding machine through the plug bolts 7 .

The preferred solution of the arc-adaptive hollow blade special fixture is that the semi-cylindrical adjustable clamping block 2 is arranged from large to small with four-stage semicircle blocks installed on the clamping block base 10, and the four-stage semicircle The blocks are respectively a first-level large semi-circular block 11, a second-level small semi-circular block 12, a third-level small semi-circular block 13 and a fourth-level smallest semi-circular block 14;

The inner circle of the first-level large semicircle block is provided with a trapezoidal boss, and the outer circle of the second-level small semicircle block is designed to allow the boss to move along the groove structure, and the relative sliding between the semicircle blocks is realized by connecting; similarly , the inner circle of the second-level small semi-circle block is designed with a trapezoidal boss, and the outer circle of the third-level small semi-circle block is designed with a groove;

The inner circle of the third-level small semi-circular block is designed with a trapezoidal boss, and the outer circle of the fourth-level smallest semi-circular block is designed with grooves;

The semi-cylindrical adjustable clamping block 2 has four levels of semi-circular blocks of different sizes. The radius of the first-level semi-circular block 11 is 20 mm, and the latter decreases successively. It can be paired with two second-level semi-circular blocks 12, and the two second-level semi-circular blocks 12 The first-level semi-circle block 12 cannot be displaced and collided; the center of the second-level semi-circle block 12 moves up by 2mm compared to the center of the first-level semi-circle block 11, and the upward movement distance of the third-level semi-circle block 13 and the fourth-level semi-circle block 14 decreases in turn. Small 0.5mm; the diameter of the fourth-level semicircle block 14 is 3.2mm, and the center of circle is parallel to the center of circle of the third-level semi-circle block 13, which is a semi-cylindrical body with a height of 10mm. The overall length of the semi-cylindrical adjustable clamping block 2 is 22mm, and the height and width match with the clamping body 1. The clamp body 1 is a part main body of a special fixture for hollow blades with radian adaptability. The angle is 2mm.

The boss milling at the installation end of the cylinder of the clamp body 1 removes the volume of 30mm wide, 43mm long and 10mm deep.

The semi-cylindrical adjustable clamping block 2 can adapt to blade tenons with different arc curvatures, and realize automatic adjustment and clamping.

The pressing block 8 can deflect left and right around the hexagon socket head screw to adjust the slope angle of the tenon of the pressing blade.

The diameter of the rail groove is 2mm.

The working principle of a special fixture for arc-adaptive hollow blades. The invention uses the positioning boss at the bottom of the clamp body and the bolts on the upper and lower sides to realize clamping and fixing on the machine tool; The block clamping assembly can realize the positioning of the fixture on the hollow blade; the semi-cylindrical adjustable clamping block can adapt to the tenons of blades with different arc curvatures, and realize automatic adjustment and clamping; the semi-cylindrical adjustable clamping block can be pushed by the cylinder Automatically fit and clamp the tenon of the blade; the clamping assembly of the pressing block can prevent the possible tilt and vibration during the grinding process of the blade, and the pressing block can deflect left and right around the screw to adjust the angle of the bevel of the tenon of the pressing blade.

Claims (8)

1. The utility model provides a hollow blade special fixture of radian adaptability which characterized in that: the clamp comprises a clamp body (1), a semi-cylindrical adjustable clamping block (2), a positioning iron sheet (3), a cylinder (4), a positioning boss (5), a pressing block clamping assembly (6) and a bolt (7);

milled bosses are arranged at the upper end and the lower end of the clamp body (1), and two threaded holes are turned out, so that the air cylinder is mounted on the front side of the milled bosses by screws;

the air cylinder (4) is installed in the milled boss end of the clamp body (1) in a threaded connection mode;

guide rail grooves are formed in two sides of the air cylinder (4), and the semi-cylindrical adjustable clamping block is arranged on the guide rail grooves, so that the semi-cylindrical adjustable clamping block (2) can move along a fixed vertical direction under the pushing of the air cylinder (4);

the positioning iron sheet (3) is connected to the side face of the semi-cylindrical adjustable clamping block through a screw and clings to the left side of the clamp body (1);

the positioning boss (5) is positioned at the bottom of the clamp body (1);

the upper side and the lower side of the clamp body (1) are provided with bolt holes;

the pressing block clamping assembly (6) comprises a pressing block (8) and inner hexagonal countersunk head screws (9), the pressing block (8) is arranged in front of the clamp body (1), the pressing block is arranged on the front of the clamp body (1) through the inner hexagonal countersunk head screws (9) and symmetrically distributed on two sides of the tenon of the blade;

the semi-cylindrical adjustable clamping block (2) is in contact with the blade tenon;

the clamp body (1) clamps the positioning boss (5) on a chuck of the numerical control abrasive belt grinding machine tool, and bolt holes arranged on the upper side and the lower side of the clamp body (1) are fixedly connected with the grinding machine tool through inserting bolts (7).

2. The radian-adaptive hollow blade special clamp according to claim 1, wherein the radian-adaptive hollow blade special clamp comprises: the semi-cylindrical adjustable clamping block (2) is provided with four stages of semi-circular blocks from large to small, a trapezoidal boss is arranged through the inner circle of the first-stage large semi-circular block, the outer circle of the second-stage small semi-circular block is provided with a groove structure which can enable the boss to move along, and relative sliding among the semi-circular blocks is realized through connection; similarly, the inner circle of the second-stage small semicircular block is provided with a trapezoidal boss, and the outer circle of the third-stage small semicircular block is provided with a groove;

the inner circle of the three-stage small semicircular block is provided with a trapezoidal boss, and the outer circle of the four-stage small semicircular block is provided with a groove; the middle of the column block of the minimum semicircular block of the four levels is a plane, and the column block is a surface which is contacted with the tenon of the blade;

the semi-cylindrical adjustable clamping blocks have semi-circular blocks with four different sizes, the radius of the first-stage semi-circular block is 20mm, the radius of the first-stage semi-circular block is sequentially reduced, two second-stage semi-circular blocks can be paired, and the two second-stage semi-circular blocks cannot be displaced and collided; the circle center of the second-stage semicircular block moves upwards by 2mm compared with the circle center of the first-stage semicircular block, and the upward movement distances of the third-stage semicircular block and the fourth-stage semicircular block are sequentially reduced by 0.5mm; the diameter of the fourth-stage semicircular block is 3.2mm, the circle center of the fourth-stage semicircular block is parallel to that of the third-stage semicircular block, and the fourth-stage semicircular block is a semicircular cylinder with the height of 10 mm; the whole length of the semi-cylindrical adjustable clamping block is 22mm, and the height and the width of the semi-cylindrical adjustable clamping block are matched with the clamp body.

3. The radian-adaptive hollow blade special clamp according to claim 1, wherein the radian-adaptive hollow blade special clamp comprises: the fixture body (1) is a part main body of the radian adaptability hollow blade special fixture, the length of the part main body is 180mm, the middle part of the part main body is provided with a space with the length of 100mm and the width of 140mm, a boss of a non-cylinder mounting end is provided with a 10mm chamfer, and the rest chamfers are 2mm.

4. The special radian-adaptive hollow blade clamp as claimed in claim 1, wherein the boss at the cylinder mounting end of the clamp body (1) is milled to remove the volume of 30mm wide, 43mm long and 10mm deep.

5. The radian-adaptive hollow blade special clamp according to claim 1, wherein the radian-adaptive hollow blade special clamp comprises: the semi-cylindrical adjustable clamping block (2) can adapt to blade tenons with different circular arc curvatures, and automatic adjustment clamping is achieved for the semi-cylindrical adjustable clamping block.

6. The special radian-adaptive hollow blade clamp as claimed in claim 1, wherein the special radian-adaptive hollow blade clamp comprises: the pressing block (8) can deflect left and right around the inner hexagonal countersunk head screw to adjust the angle of the tenon inclined surface of the pressing blade.

7. The radian-adaptive hollow blade special clamp according to claim 1, wherein the radian-adaptive hollow blade special clamp comprises: the diameter of the guide rail groove is 2mm.

8. The radian-adaptive hollow blade special clamp according to claim 1, wherein the radian-adaptive hollow blade special clamp comprises: one end of the pressing block is arranged on an inclined plane, and the inclination angle of the pressing block is 45 degrees.

Images