A floating fixture and method for aeroengine blade

Abstract

The application relates to a floating positioning clamp and method suitable for an aero-engine blade, which comprises an upper clamping body structure and a floating positioning mechanism. A plurality of positioning blocks, a plurality of positioning pins and a positioning column are installed on a bottom plate, the installation positions of the positioning blocks, the positioning pins and the positioning column form a first six-point positioning for the top of the blade, and a first pressing structure presses and fixes the bottom of the blade. The bottom of a support is installed on a base, the bottom of an adjusting piece is provided with a first elastic piece, a locking piece locks the adjusting piece through a locking support, a second pressing structure has a bushing, a pressing piece, a second elastic piece and a locking piece, the bushing is installed on the base, the second elastic piece is installed at the bottom of the pressing piece and is arranged in the bushing at the bottom of the pressing piece, and the locking piece locks the pressing piece. Through the structure, the problems that the existing alloy pouring process is long and the automation degree is low are solved.

Description

Technical Field

[0001] This invention relates to the field of aero-engine blade machining technology, specifically to a floating positioning fixture and method suitable for aero-engine blades. Background Technology

[0002] Aero-engine blades are complex profiled parts, typically cast or forged, requiring machining to ensure their dimensional accuracy meets design requirements. Blade blanks are often positioned using datum points, directly using the blank datum as the machining precision datum. This method is difficult to clamp, has poor machining stability, and is prone to issues such as datum point detachment and machining chatter, especially when the datum point is located on a curved transition surface like the blade exhaust edge, where machining instability is even more pronounced. For these types of aero-engine blades, current methods involve casting an alloy to transfer the blank datum to an alloy block, and then using the converted datum to machine the precision datum.

[0003] While the casting alloy processing technology can solve the problem of poor stability in the positioning of blade blanks, it will cause alloy impurities to adhere to the blade surface, which needs to be removed by acid washing. This not only prolongs the process but also makes it difficult to adapt to the requirements of automated processing. Summary of the Invention

[0004] This invention provides a floating positioning fixture and method suitable for aero-engine blades. The floating positioning fixture directly converts the positioning reference point of the blade blank through mechanical means, thereby improving the stability of blade blank processing and solving the problems of long casting alloy process and low degree of automation.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] The upper clamping structure includes a base plate, a positioning structure, and a first clamping structure. The positioning structure has multiple positioning blocks, multiple positioning pins, and positioning posts. The multiple positioning blocks, multiple positioning pins, and positioning posts are all installed on the base plate. The installation positions of the positioning blocks, positioning pins, and positioning posts form a first six-point positioning for the top of the blade. The first clamping structure clamps and fixes the bottom of the blade.

[0007] The floating positioning mechanism includes a base, an auxiliary support structure, and a second pressing structure. The auxiliary support structure has a support, an adjusting member, a first elastic member, and a locking member. The bottom of the support is mounted on the base. The bottom of the adjusting member is provided with the first elastic member. The locking member locks the adjusting member by locking the support. The second pressing structure has a bushing, a pressing member, a second elastic member, and a locking member. The bushing is mounted on the base. The second elastic member is mounted on the bottom of the pressing member and is disposed inside the bushing along with the bottom of the pressing member. The locking member locks the pressing member.

[0008] The beneficial effects of this invention are as follows: The upper clamping structure uses three positioning blocks, two positioning pins, and one positioning post installed at different positions on the base plate to perform six-point positioning of the top of the blade blank. Then, the bottom of the blade is pressed and fixed by the first clamping structure. Multiple auxiliary support structures are provided. Under the elastic action of the first elastic element, the adjusting members of these structures can be adjusted up and down on the support. The top of the adjusting member abuts against multiple parts of the bottom of the blade blank. Then, the support is locked by the locking member, and the adjusting member is simultaneously locked and fixed. This allows the multiple adjusting members to float and fix the blade. Then, under the elastic action of the second elastic element, the clamping member abuts against the two sides of the blade blank. Then, the locking member fixes the clamping member, so that one end of the clamping member abuts against the two sides of the blade blank, fixing the two sides of the blade blank. The function of the upper clamping structure is to fix the spatial posture of the blade with the positioning point of the blade blank as the positioning reference. The function of the floating positioning mechanism is to position and clamp the blade through the floating positioning mechanism, and to mechanically convert the blade's reference positioning from the six-point positioning of the upper clamping structure to the floating positioning, thereby improving the stability of the blade blank processing and solving the problems of long casting alloy process and low degree of automation.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the positioning block has a first positioning block, a second positioning block, and a third positioning block. The first positioning block and the second positioning block are installed on the same side of the base plate, and the third positioning block is installed on the other side of the base plate. The first positioning block, the second positioning block, and the third positioning block form a triangular positioning. The positioning pin has a first positioning pin and a second positioning pin. The first positioning pin is adjacent to the first positioning block, and the second positioning pin is adjacent to the second positioning block. The positioning post is installed at one corner of the base plate and is adjacent to the first positioning pin and the first positioning block. The first clamping structure has a first screw, a second screw, a stud, a pressure rod, and a pressure plate. One end of the first screw and the stud is mounted on the base plate. The other end of the first screw is rotatably connected to the second screw through a first pin. The other end of the stud is rotatably connected to one end of the pressure rod through a second pin. The other end of the pressure rod has an opening. The second screw passes through the opening to lock the pressure rod. The pressure plate is rotatably connected to the pressure rod through a third pin. A nylon plate is provided on the surface of the pressure plate that contacts the blade. The nylon plate is fixedly connected to the pressure plate.

[0011] The beneficial effect of adopting the above-mentioned further solution is that, firstly, one end of the blade is abutted against the positioning post, and then the position of the blade is adjusted so that one side of the blade abuts against the third positioning block. The positioning post, along with the first, second, and third positioning blocks, provides four-point positioning for the top of the blade. Then, the first and second positioning pins position the other side of the blade, so that the overall positioning structure provides six-point positioning for the top of the blade. Next, the height of the first screw, the second screw, and the stud relative to the base plate is adjusted, and the angle between the pressure plate and the pressure rod is rotated around the third pin shaft, so that the upper surface of the pressure plate abuts against the lower surface of the blade, thus pressing and fixing the blade. A nylon plate is placed on the pressure plate; the nylon plate contacts the blade, which can protect the surface of the blade and prevent damage.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the support has a locking clip, the top of the adjusting member passes through the locking clip, the bottom of the adjusting member and the first elastic member are disposed inside the support, and the locking member passes through both ends of the locking clip.

[0014] The beneficial effect of adopting the above-described further solution is that, by adjusting the locking tightness of the locking clip, the adjusting member, under the elastic action of the first elastic member, causes its top to abut against the bottom of the blade material. Then, by turning the locking member, the locking member locks the locking clip, and simultaneously, the locking clip locks and fixes the adjusting member in place. This positions the adjusting member relative to the bottom of the blade.

[0015] Based on the above technical solution, the present invention can be further improved as follows.

[0016] Furthermore, the upper part of the clamping member has a clamping plate, which is located on top of the bushing, and the locking member is located above the clamping plate.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the clamping plate is set on the top of the bushing, and one end of the clamping plate abuts against both sides of the blade material, thereby fixing the blade material to the sides and preventing the blade from falling to the sides.

[0018] Based on the above technical solution, the present invention can be further improved as follows.

[0019] Furthermore, there are four auxiliary support structures, which are installed in pairs on opposite sides of the base. There are two second clamping structures, with one second clamping structure installed between every two auxiliary support structures. The four auxiliary support structures and the two second clamping structures form a second six-point positioning.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the four auxiliary support structures are installed in pairs on opposite sides of the base, forming a four-point positioning for the bottom surface of the blade, thus improving the positioning stability of the blade. While the four auxiliary support structures form a four-point positioning for the bottom surface of the blade, two second clamping structures are used to position the two opposite sides of the blade, forming a second six-point positioning for the blade blank. Then, the upper clamping structure cooperates with the floating positioning mechanism, which adapts to blades in different blank states, thereby transferring the blade blank positioning reference to the lower floating positioning base, effectively improving the stability of blade processing.

[0021] Based on the above technical solution, the present invention can be further improved as follows.

[0022] Furthermore, the positioning structure and the first clamping structure are detachably mounted on the base plate.

[0023] The advantage of adopting the above-mentioned further solution is that the various components of the positioning structure and the first clamping structure can be set according to the characteristics of the parts.

[0024] Based on the above technical solution, the present invention can be further improved as follows.

[0025] Furthermore, the auxiliary support structure and the second clamping structure are detachably mounted on the base.

[0026] The advantage of adopting the above-mentioned further solution is that the components of the auxiliary support structure and the second clamping structure can be set according to the characteristics of the parts.

[0027] Based on the above technical solution, the present invention can be further improved as follows.

[0028] Furthermore, the upper clamping structure and the floating positioning mechanism work together to clamp and fix the object.

[0029] The beneficial effects of adopting the above-mentioned further solution are that the upper clamping structure and the floating positioning mechanism cooperate to fix the blade, allowing the positioning reference on the blade body to be transferred to the adjusting part of the floating positioning mechanism. The auxiliary support structure and the second clamping structure fix the blade to the floating positioning mechanism, ensuring the stability of the blade blank processing. During the processing, all grinding force is transmitted to the base of the floating positioning mechanism through the blade rim and the auxiliary support structure, preventing the blade positioning points from detaching or being damaged. The floating positioning fixture can mechanically transfer the positioning reference on the blade body to the end face of the blade rim, effectively improving the processing stability of the six-point positioning of the blade blank. It can replace the casting alloy process, is easy to operate, has strong applicability, and is innovative and has high economic benefits.

[0030] Based on the above technical solution, the present invention can be further improved as follows.

[0031] Furthermore, the two opposite sides of the upper clamping structure and the floating positioning mechanism are provided with a locking structure. The locking structure has a first handle, a tensioner, and a tensioning member. The bottom of the tensioner is installed on both sides of the base. The first handle and the tensioning member are fixedly installed on the tensioner by a fourth pin. One end of the tensioning member is hung on the side of the base plate. The opposite sides of the base plate have protrusions with grooves. One end of the tensioning member is hung in the groove. A second handle is provided at the protrusion.

[0032] The beneficial effect of adopting the above-mentioned further solution is that the upper clamping body structure and the floating positioning mechanism are locked and fixed by the locking structure, so that the base plate is tightly fastened to the base.

[0033] On the other hand, the present invention provides a floating positioning method suitable for aero-engine blades, wherein the blade blank positioning conversion steps are as follows:

[0034] S1. Open the locking structure and place the blade on the positioning block of the upper clamping body structure. Ensure that the blade positioning point is in contact with the positioning block and positioning pin at the same time. The blade blank is positioned at the first six points by three positioning blocks, two positioning pins and one positioning post.

[0035] S2. The upper clamping structure and the floating positioning mechanism are fixed together by a locking structure.

[0036] S3. The adjusting parts of the four auxiliary support structures abut against the bottom of the blade blank, forming a four-point positioning; the clamping plates of the two second clamping structures abut against the two sides of the blade blank, forming a two-point positioning; wherein, the four-point positioning and the two-point positioning form a second six-point positioning.

[0037] S4. The first six-point positioning of the blade material by the upper clamping structure is converted to the second six-point positioning of the blade material by the floating positioning mechanism.

[0038] The advantages of the above solution are that the upper clamping structure is used in conjunction with the floating positioning mechanism, and the base plate is tightly fastened to the base. First, the blade is placed on the positioning block of the upper clamping structure, ensuring that the blade positioning point contacts the positioning block and positioning pin simultaneously, and the blade is pressed tightly by the pressure plate; then, with the adjusting component of the floating positioning mechanism in a free state, the upper clamping structure is inverted onto the base of the floating positioning mechanism. The upper surface of the adjusting component of the auxiliary support structure first contacts the end face of the blade mounting plate. At this time, the two sides of the base plate contact the two sides of the base. The base plate needs to be pressed down and fixed to the base by pressing or using a quick tensioner. With the base plate and base fixed in place, the locking components of the four auxiliary support structures are tightened in sequence to fix the position of the adjusting component, so that the positioning reference on the blade body is transferred to the adjusting component of the floating positioning mechanism; finally, the second pressing mechanism of the floating positioning mechanism is tightened, and the blade is fixed to the floating positioning mechanism by the auxiliary support structure and the second pressing structure, ensuring the stability of the blade blank processing. During the machining process, all grinding force is transmitted to the base of the floating positioning mechanism through the blade rim and auxiliary support structure, preventing the blade positioning points from detaching or being damaged. The floating positioning fixture can mechanically transfer the positioning reference on the blade body to the end face of the blade rim, effectively improving the machining stability of the six-point positioning of the blade blank. It can replace the casting alloy process, is easy to operate, has strong applicability, and is innovative with high economic benefits. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of a floating positioning fixture and method for aero-engine blades according to the present invention;

[0040] Figure 2 This is a side view of the present invention;

[0041] Figure 3 This is a front view of the present invention.

[0042] Figure 4 This is a top view of the present invention;

[0043] Figure 5 This is a schematic diagram of the upper clamping structure of the present invention;

[0044] Figure 6 This is a schematic diagram of the floating positioning mechanism of the present invention;

[0045] Figure 7 This is a schematic diagram of the auxiliary support structure of the present invention;

[0046] Figure 8 This is a cross-sectional view of the auxiliary support structure of the present invention;

[0047] Figure 9This is a cross-sectional view of the second clamping structure of the present invention.

[0048] The components represented by each number in the attached diagram are listed below: 100 - Upper clamping structure; 110 - Base plate; 111 - Protrusion; 113 - Groove; 115 - Second handle; 130 - Positioning structure; 131 - Positioning block; 1311 - First positioning block; 1313 - Second positioning block; 1315 - Third positioning block; 133 - Positioning pin; 1331 - First positioning pin; 1333 - Second positioning pin; 135 - Positioning post; 150 - First clamping structure; 151 - First screw; 153 - Second screw; 1531 - First pin; 155 - Stud ; 1551-Second pin; 157-Pressure rod; 159-Pressure plate; 1591-Third pin; 300-Floating positioning mechanism; 310-Base; 330-Auxiliary support structure; 331-Support; 3311-Locking clip; 333-Adjusting component; 335-First elastic component; 337-Locking component; 350-Second pressing structure; 351-Bushing; 353-Pressure component; 3531-Pressure plate; 355-Second elastic component; 357-Locking component; 500-Locking structure; 510-First handle; 530-Tensioner; 550-Tensioner. Detailed Implementation

[0049] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0050] Example 1

[0051] like Figure 1-9 As shown, the upper clamping structure 100 includes a base plate 110, a positioning structure 130, and a first pressing structure 150. The positioning structure 130 has multiple positioning blocks 131, multiple positioning pins 133, and positioning posts 135. The multiple positioning blocks 131, multiple positioning pins 133, and positioning posts 135 are all installed on the base plate 110. The installation positions of the positioning blocks 131, positioning pins 133, and positioning posts 135 form a first six-point positioning for the top of the blade. The first pressing structure 150 presses and fixes the bottom of the blade.

[0052] The floating positioning mechanism 300 includes a base 310, an auxiliary support structure 330, and a second pressing structure 350. The auxiliary support structure 330 has a support 331, an adjusting member 333, a first elastic member 335, and a locking member 337. The bottom of the support 331 is mounted on the base 310. The bottom of the adjusting member 333 is provided with the first elastic member 335. The locking member 337 locks the adjusting member 333 by locking the support 331. The second pressing structure 350 has a bushing 351, a pressing member 353, a second elastic member 355, and a locking member 357. The bushing 351 is mounted on the base 310. The second elastic member 355 is mounted on the bottom of the pressing member 353 and is disposed inside the bushing 351 with the bottom of the pressing member 353. The locking member 357 locks the pressing member 353.

[0053] Specifically, first, the upper clamping structure 100 is flipped over, and the top of the blade is placed on the base plate 110. The position of the blade is adjusted, and the blade is positioned at six points using the positioning structure 130. Then, the bottom of the blade is pressed and fixed by the first pressing structure 150. Next, the bottom of the blade is positioned by the adjusting member 333 of the auxiliary support structure 330. Under the elastic action of the first elastic member 335, the height of the adjusting member 333 can be adjusted up and down on the support 331. The height of the adjusting member 333 can be the same or different. Then, the top of the adjusting member 333 abuts against multiple parts of the bottom of the blade blank. Then, the support 331 is locked using the locking member 337, and the adjusting member 333 is locked and fixed at the same time. Finally, under the elastic action of the second elastic member 355, one end of the pressing member 353 abuts against the two sides of the blade. Then, the locking member 357 fixes the pressing member 353.

[0054] like Figure 1-9As shown, the positioning block 131 has a first positioning block 1311, a second positioning block 1313, and a third positioning block 1315. The first positioning block 1311 and the second positioning block 1313 are mounted on the same side of the base plate 110, and the third positioning block 1315 is mounted on the other side of the base plate 110. The first positioning block 1311, the second positioning block 1313, and the third positioning block 1315 form a triangular positioning. The positioning pin 133 has a first positioning pin 1331 and a second positioning pin 1333. The first positioning pin 1331 is adjacent to the first positioning block 1311, and the second positioning pin 1333 is adjacent to the second positioning block 1313. The positioning post 135 is mounted at one corner of the base plate 110 and is adjacent to the first positioning pin 1331 and the first positioning pin 1315. Adjacent to block 1311, the first clamping structure 150 has a first screw 151, a second screw 153, a stud 155, a pressure rod 157, and a pressure plate 159. One end of the first screw 151 and the stud 155 are mounted on the base plate 110. The other end of the first screw 151 is rotatably connected to the second screw 153 through a first pin 1531. The other end of the stud 155 is rotatably connected to one end of the pressure rod 157 through a second pin 1551. The other end of the pressure rod 157 has an opening. The second screw 153 passes through the opening to lock the pressure rod 157. The pressure plate 159 is rotatably connected to the pressure rod 157 through a third pin 1591. A nylon plate is provided on the surface of the pressure plate 159 that contacts the blade. The nylon plate is fixedly connected to the pressure plate 159.

[0055] Specifically, first, one end of the blade is placed against the positioning post 135. Then, the position of the blade is adjusted so that one side of the blade rests against the third positioning block 1315. The positioning post 135, together with the first positioning block 1311, the second positioning block 1313, and the third positioning block 1315, provides four-point positioning for the top of the blade. Then, the first positioning pin 1331 and the second positioning pin 1333 provide positioning for the other side of the blade, making the positioning structure 130 provide six-point positioning for the top of the blade. Next, the height of the first screw 151, the second screw 153, and the stud 155 relative to the base plate 110 is adjusted. The angle between the pressure plate 159 and the pressure rod 157 is rotated around the third pin shaft 1591, so that the upper surface of the pressure plate 159 rests against the lower surface of the blade, thus pressing and fixing the blade. A nylon plate is placed on the pressure plate 159. The nylon plate contacts the blade and protects the surface of the blade, preventing damage.

[0056] like Figure 1-9 As shown, the support 331 has a locking clip 3311, the top of the adjusting member 333 passes through the locking clip 3311, the bottom of the adjusting member 333 and the first elastic member 335 are disposed in the support 331, and the locking member 337 passes through both ends of the locking clip 3311.

[0057] Specifically, by adjusting the tightness of the locking clip 3311, the adjusting member 333, under the elastic action of the first elastic member 335, abuts against the bottom of the blade material. Then, the locking member 337 is turned to lock the locking clip 3311, and simultaneously, the locking clip 3311 locks and fixes the adjusting member 333. This positions the adjusting member 333 against the bottom of the blade.

[0058] like Figure 1-9 As shown, the upper part of the clamping member 353 has a clamping plate 3531, the clamping plate 3531 is disposed on the top of the bushing 351, and the locking member 357 is disposed above the clamping plate 3531.

[0059] Specifically, the clamping plate 3531 is set on the top of the bushing 351, and one end of the clamping plate 3531 abuts against both sides of the blade material to fix the blade material from the side.

[0060] like Figure 1-9 As shown, there are four auxiliary support structures 330, which are installed in pairs on opposite sides of the base 310. There are two second pressing structures 350, with one second pressing structure 350 installed between every two auxiliary support structures 330. The four auxiliary support structures 330 and the two second pressing structures 350 form a second six-point positioning.

[0061] Specifically, four auxiliary support structures 330 are installed in pairs on opposite sides of the base 310, forming a four-point positioning for the bottom surface of the blade, thus improving the positioning stability of the blade. While the four auxiliary support structures 330 form a four-point positioning for the bottom surface of the blade, two second clamping structures 350 are used to position the two opposite sides of the blade, forming a new six-point positioning for the blade blank.

[0062] like Figure 1-9 As shown, the positioning structure 130 and the first pressing structure 150 are detachably mounted on the base plate 110.

[0063] Specifically, the various components of the positioning structure 130 and the first clamping structure 150 can be set according to the characteristics of the parts.

[0064] like Figure 1-9 As shown, the auxiliary support structure 330 and the second clamping structure 350 are detachably mounted on the base 310.

[0065] Specifically, the components of the auxiliary support structure 330 and the second clamping structure 350 can be set according to the characteristics of the parts.

[0066] like Figure 1-9 As shown, the upper clamping structure 100 and the floating positioning mechanism 300 cooperate to clamp and fix each other.

[0067] Specifically, the upper clamping structure 100 and the floating positioning mechanism 300 cooperate to clamp and fix each other, so that the positioning reference on the blade body is transferred to the adjusting component 333 of the floating positioning mechanism 300. The auxiliary support structure 330 and the second clamping structure 350 fix the blade on the floating positioning mechanism 300 to ensure the stability of the blade blank processing.

[0068] like Figure 1-9 As shown, the upper clamping structure 100 and the floating positioning mechanism 300 are connected by two opposite sides with a locking structure 500. The locking structure 500 has a first handle 510, a tensioner 530 and a tensioning member 550. The bottom of the tensioner 530 is installed on both sides of the base 310. The first handle 510 and the tensioning member 550 are fixedly installed on the tensioner 530 by a fourth pin. One end of the tensioning member 550 is hung on the side of the base plate 110. The opposite sides of the base plate 110 have protrusions 111 respectively. The protrusions 111 have grooves 113. One end of the tensioning member 550 is hung in the grooves 113. A second handle 115 is provided at the protrusions 111.

[0069] Specifically, by pulling the first handle 510, one end of the tensioning member 550 is hooked into the groove 113, and then by pulling the first handle 510, the upper clamping structure 100 and the floating positioning mechanism 300 are fastened and locked together. Alternatively, by pulling the first handle 510, one end of the tensioning member 550 is removed from the groove 113, separating the upper clamping structure 100 from the floating positioning mechanism 300.

[0070] The beneficial effects of this embodiment are as follows: The upper clamping structure 100 is installed at different positions on the base plate 110 via three positioning blocks 131, two positioning pins 133, and one positioning post 135 to perform six-point positioning of the top of the blade material. Then, the bottom of the blade is pressed and fixed by the first pressing structure 150. Multiple auxiliary support structures 330 are provided. Under the elastic action of the first elastic member 335, the adjusting members 333 of the multiple auxiliary support structures 330 can be adjusted up and down on the support 331. Then, the top of the adjusting member 333 abuts against multiple parts of the bottom of the blade material. Then, the support 331 is locked by the locking member 337, and the adjusting member 333 is locked and fixed simultaneously. This allows the multiple adjusting members 333 to float and fix the blade. Then, under the elastic action of the second elastic member 355, the clamping member 353 abuts against the two sides of the blade blank. Then, the locking member 357 fixes the clamping member 353, so that one end of the clamping member 353 abuts against the two sides of the blade blank and fixes the two sides of the blade blank. The function of the upper clamping body structure 100 is to fix the spatial posture of the blade with the positioning point of the blade blank as the positioning reference. The function of the floating positioning mechanism 300 is to position and clamp the blade through the floating positioning mechanism 300, and to mechanically convert the reference positioning of the blade from the six-point positioning of the upper clamping body structure 100 to the floating positioning, so that the positioning reference of the blade has both the first six-point positioning and the second six-point positioning, forming a new positioning, thereby improving the stability of the blade blank processing and solving the problems of long casting alloy process and low degree of automation.

[0071] The working process of this embodiment is as follows: First, open the locking structure 500, flip the upper clamping structure 100, and then place one end of the blade against the positioning post 135. Adjust the position of the blade so that one side of the blade abuts against the third positioning block 1315. The positioning post 135, the first positioning block 1311, the second positioning block 1313, and the third positioning block 1315 provide four-point positioning for the top of the blade. Then, the first positioning pin 1331 and the second positioning pin 1333 provide positioning for the other side of the blade, so that the positioning structure 130 as a whole provides six-point positioning for the top of the blade. Then, adjust the height of the first screw 151, the second screw 153, and the stud 155 relative to the base plate 110, and rotate the angle between the pressure plate 159 and the pressure rod 157 around the third pin shaft 1591, so that the upper surface of the pressure plate 159 abuts against the lower surface of the blade, thereby pressing and fixing the blade.

[0072] Then, the upper clamping structure 100 is inverted and placed on the floating positioning mechanism 300, and the upper clamping structure 100 and the floating positioning mechanism 300 are locked together using the locking structure 500. Next, the locking tightness of the four locking clips 3311 is adjusted, and the tops of the four adjusting members 333 abut against the bottom of the blade material under the elastic action of the four first elastic members 335. Then, the locking member 337 is turned, locking each locking clip 3311, and simultaneously, the locking clips 3311 lock and fix the adjusting members 333, thus positioning the bottom of the blade. Under the elastic action of the second elastic member 355, one end of the pressure plate 3531 abuts against both sides of the blade material, providing lateral fixation. The four adjusting members 333 and the two pressure plates 3531 form a second six-point positioning of the blade material.

[0073] Example 2

[0074] This embodiment includes all the contents of Embodiment 1.

[0075] like Figure 1-9 As shown, this invention provides a floating positioning method suitable for aero-engine blades. The steps for positioning and converting the blade blank are as follows:

[0076] S1. Open the locking structure (500), place the blade on the positioning block of the upper clamping body structure (100), and ensure that the blade positioning point is in contact with the positioning block (131) and the positioning pin (133) at the same time. The blade blank is positioned at the first six points by three positioning blocks (131), two positioning pins (133) and one positioning post (135).

[0077] S2. The upper clamping structure (100) and the floating positioning mechanism (300) are fixed together by the locking structure (500);

[0078] S3. The adjusting parts (333) of the four auxiliary support structures (330) abut against the bottom of the blade material to form a four-point positioning, and the pressing plates (3531) of the two second pressing structures (350) abut against the two sides of the blade material to form a two-point positioning; wherein, the four-point positioning and the two-point positioning form a second six-point positioning.

[0079] S4. The first six-point positioning of the blade material by the upper clamping structure (100) is converted to the second six-point positioning of the blade material by the floating positioning mechanism (300).

[0080] Specifically, first, pull the first handle 510 to remove one end of the tensioning member 550 from the groove 113, thus separating the upper clamping structure 100 from the floating positioning mechanism 300.

[0081] Then, holding the second handles 115 on both sides of the base plate 110 with both hands, flip the upper clamping structure 100, unscrew the second screw 153, rotate the pressure rod 157 around the second pin 1551, and the end of the pressure rod 157 with an opening leaves the second screw 153. Rotate the pressure rod 157 to open it.

[0082] Then, the blade is placed on the positioning block 131 of the upper clamping structure 100, with one end of the blade abutting against the positioning post 135. The position of the blade is adjusted so that one side of the blade abuts against the third positioning block 1315. The positioning post 135, together with the first positioning block 1311, the second positioning block 1313, and the third positioning block 1315, provides four-point positioning for the top of the blade. Then, the first positioning pin 1331 and the second positioning pin 1333 provide positioning for the other side of the blade, ensuring that the blade positioning point contacts the positioning block 131 and the positioning pin 133 simultaneously, so that the positioning structure 130 as a whole provides six-point positioning for the top of the blade.

[0083] Then, rotate the pressure rod 157 around the second pin 1551. The end of the pressure rod 157 with an opening passes through the second screw 153. Then, adjust the height between the first screw 151, the stud 155 and the base plate 110. Rotate the pressure plate 159 and the pressure rod 157 around the third pin 1591. Then, tighten the second screw 153 to fix the pressure plate 159 to the bottom of the blade material.

[0084] Then, flip the upper clamping structure 100 with the blade material installed, pull the first handle 510, hook one end of the tensioning member 550 into the groove 113, and then pull the first handle 510 to lock the upper clamping structure 100 and the floating positioning mechanism 300 together.

[0085] Then, the tightening of the four locking clips 3311 is adjusted. Under the elastic action of the four first elastic elements 335, the tops of the four adjusting elements 333 abut against the bottom of the blade material. Then, the locking element 337 is turned, locking each locking clip 3311. At the same time, the locking clips 3311 lock and fix the adjusting elements 333, and the four adjusting elements 333 position the bottom of the blade. Under the elastic action of the second elastic element 355, one end of the pressure plate 3531 abuts against both sides of the blade material, thus fixing the blade material laterally.

[0086] Finally, the floating positioning mechanism 300 forms a second six-point positioning for the blade material, converting the first six-point positioning of the upper clamping structure 100 for the blade material to the second six-point positioning of the floating positioning mechanism 300 for the blade material.

[0087] The beneficial effects of this embodiment are: the upper clamping structure 100 is used in conjunction with the floating positioning mechanism 300, and the base plate 110 is tightly fastened to the base 310. First, the blade is placed on the positioning block 131 of the upper clamping structure 100, ensuring that the blade positioning point contacts the positioning block 131 and the positioning pin 133 simultaneously, and the blade is pressed by the pressure plate 159; then, while ensuring that the adjusting member 333 of the floating positioning mechanism 300 is in a free state, the upper clamping structure 100 is inverted onto the base 310 of the floating positioning mechanism 300, and the upper surface of the adjusting member of the auxiliary support structure 330 first contacts the end face of the blade mounting plate. At this time, the two sides of the base plate 110 contact the two sides of the base 310, which need to be pressed or Using the quick-tensioner 530, the base plate 110 is pressed down and fixed to the base 310. While ensuring the base plate 110 and base 310 are firmly attached, the locking pieces 337 of the four auxiliary support structures 330 are tightened sequentially to fix the position of the adjusting piece 333, transferring the positioning reference on the blade body to the adjusting piece 333 of the floating positioning mechanism 300. Finally, the second clamping mechanism of the floating positioning mechanism 300 is tightened, fixing the blade to the floating positioning mechanism 300 through the auxiliary support structure 330 and the second clamping structure 350, ensuring the stability of the blade blank processing. During processing, all grinding force is transmitted to the base 310 of the floating positioning mechanism 300 via the blade edge plate and auxiliary support structure 330, preventing the blade positioning points from detaching or being damaged. The floating positioning fixture can mechanically transfer the positioning reference on the blade body to the end face of the blade edge plate, effectively improving the processing stability of the six-point positioning of the blade blank. It can replace the casting alloy process, is easy to operate, highly applicable, innovative, and has high economic benefits.

[0088] The working process of this embodiment is as follows: Pull the first handle 510 to remove one end of the tensioning member 550 from the groove 113, separating the upper clamping structure 100 from the floating positioning mechanism 300. Then, holding the second handles 115 on both sides of the base plate 110 with both hands, flip the upper clamping structure 100, unscrew the second screw 153, and rotate the pressure rod 157 around the second pin 1551. The end of the pressure rod 157 with an opening leaves the second screw 153, and the pressure rod 157 is rotated open. Then, place the blade on the positioning block 131 of the upper clamping structure 100, abut one end of the blade against the positioning post 135, adjust the position of the blade, and abut one side of the blade against the third positioning block 1315. The positioning post 135, the first positioning block 1311, the second positioning block 1313, and the third positioning block 1315 provide four-point positioning for the top of the blade. Then, the first positioning pin 1331 and the second positioning pin 1333 position the other side of the blade, ensuring that the blade positioning point contacts the positioning block 131 and the positioning pin 133 simultaneously, so that the positioning structure 130 as a whole forms a six-point positioning of the top of the blade. Then, the pressure rod 157 is rotated about the second pin 1551 as the axis, and the end of the pressure rod 157 with an opening passes through the second screw 153. Then, the height between the first screw 151, the stud 155 and the base plate 110 is adjusted, and the angle between the pressure plate 159 and the pressure rod 157 is adjusted by rotating about the third pin 1591 as the axis. Then, the second screw 153 is tightened to fix the pressure plate 159 to the bottom of the blade blank. Then, the upper clamping body structure 100 on which the blade blank is installed is flipped over, the first handle 510 is pulled, and one end of the tensioning member 550 is hooked into the groove 113. Then, the first handle 510 is pulled, and the upper clamping body structure 100 and the floating positioning mechanism 300 are fastened and locked. Then, the tightening of the four locking clips 3311 is adjusted. Under the elastic action of the four first elastic elements 335, the tops of the four adjusting elements 333 abut against the bottom of the blade material. Then, the locking element 337 is turned, locking each locking clip 3311. At the same time, the locking clips 3311 lock and fix the adjusting elements 333, and the four adjusting elements 333 position the bottom of the blade. Under the elastic action of the second elastic element 355, one end of the pressure plate 3531 abuts against both sides of the blade material, thus fixing the blade material laterally.

[0089] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0090] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0091] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0092] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0093] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0094] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A floating positioning fixture suitable for aero-engine blades, characterized in that, include The upper clamping structure (100) includes a base plate (110), a positioning structure (130), and a first pressing structure (150). The positioning structure (130) has multiple positioning blocks (131), multiple positioning pins (133), and positioning posts (135). The multiple positioning blocks (131), multiple positioning pins (133), and the positioning posts (135) are all installed on the base plate (110). The installation positions of the positioning blocks (131), the positioning pins (133), and the positioning posts (135) form a first six-point positioning for the top of the blade. The first pressing structure (150) presses and fixes the bottom of the blade. A floating positioning mechanism (300) includes a base (310), an auxiliary support structure (330), and a second pressing structure (350). The auxiliary support structure (330) has a support (331), an adjusting member (333), a first elastic member (335), and a locking member (337). The bottom of the support (331) is mounted on the base (310), the bottom of the adjusting member (333) is provided with the first elastic member (335), and the locking member (337) is through... The adjusting member (333) is locked by locking the support (331). The second pressing structure (350) has a bushing (351), a pressing member (353), a second elastic member (355), and a locking member (357). The bushing (351) is mounted on the base (310). The second elastic member (355) is mounted on the bottom of the pressing member (353) and is disposed inside the bushing (351) with the bottom of the pressing member (353). The locking member (357) locks the pressing member (353). The upper clamping structure (100) and the floating positioning mechanism (300) cooperate to clamp and fix each other; The upper clamping structure (100) and the floating positioning mechanism (300) are connected to two opposite sides with a locking structure (500). The locking structure (500) has a first handle (510), a tensioner (530) and a tensioning member (550). The bottom of the tensioner (530) is installed on both sides of the base (310). The first handle (510) and the tensioning member (550) are fixedly installed on the tensioner (530) by a fourth pin. One end of the tensioning member (550) is hung on the side of the base plate (110). The base plate (110) has protrusions (111) on opposite sides. The protrusions (111) have grooves (113) on them. One end of the tensioning member (550) is hung in the grooves (113). A second handle (115) is provided at the protrusions (111).

2. A floating positioning fixture for aero-engine blades according to claim 1, characterized in that, The positioning block (131) has a first positioning block (1311), a second positioning block (1313), and a third positioning block (1315). The first positioning block (1311) and the second positioning block (1313) are installed on the same side of the base plate (110), and the third positioning block (1315) is installed on the other side of the base plate (110). The first positioning block (1311), the second positioning block (1313), and the third positioning block (1315) form a triangular positioning. The positioning pin (133) has a first positioning pin (1331) and a second positioning pin (1333). The first positioning pin (1331) is adjacent to the first positioning block (1311), and the second positioning pin (1333) is adjacent to the second positioning block (1313). The positioning post (135) is installed at one corner of the base plate (110) and is adjacent to the first positioning pin (1331), the first positioning block (1311), the second positioning block (1313), and the third positioning block (1315). 1311) Adjacent to each other, the first clamping structure (150) has a first screw (151), a second screw (153), a stud (155), a pressure rod (157), and a pressure plate (159). One end of the first screw (151) and the stud (155) are mounted on the base plate (110). The other end of the first screw (151) is rotatably connected to the second screw (153) through a first pin (1531). The stud (155) The other end is rotatably connected to one end of the pressure rod (157) via a second pin (1551). The other end of the pressure rod (157) has an opening. The second screw (153) passes through the opening to lock the pressure rod (157). The pressure plate (159) is rotatably connected to the pressure rod (157) via a third pin (1591). A nylon plate is provided on the surface of the pressure plate (159) that contacts the blade. The nylon plate is fixedly connected to the pressure plate (159).

3. A floating positioning fixture for aero-engine blades according to claim 1, characterized in that, The support (331) has a locking clip (3311), the top of the adjusting member (333) passes through the locking clip (3311), the bottom of the adjusting member (333) and the first elastic member (335) are disposed in the support (331), and the locking member (337) passes through both ends of the locking clip (3311).

4. A floating positioning fixture for aero-engine blades according to claim 1, characterized in that, The upper part of the clamping member (353) has a clamping plate (3531), the clamping plate (3531) is disposed on the top of the bushing (351), and the locking member (357) is disposed above the clamping plate (3531).

5. A floating positioning fixture for aero-engine blades according to claim 1, characterized in that, There are four auxiliary support structures (330), and the four auxiliary support structures (330) are installed in pairs on opposite sides of the base (310). There are two second pressing structures (350), and a second pressing structure (350) is installed between every two auxiliary support structures (330). The four auxiliary support structures (330) and the two second pressing structures (350) form a second six-point positioning.

6. A floating positioning fixture for aero-engine blades according to claim 1, characterized in that, The positioning structure (130) and the first pressing structure (150) are detachably mounted on the base plate (110).

7. A floating positioning fixture for aero-engine blades according to claim 1, characterized in that, The auxiliary support structure (330) and the second clamping structure (350) are detachably mounted on the base (310).

8. A floating positioning method suitable for aero-engine blades, characterized in that, Based on the floating positioning fixture for aero-engine blades as described in any one of claims 1-7, the steps for positioning and converting blade blanks are as follows: S1. Open the locking structure (500), place the blade on the positioning block of the upper clamping body structure (100), and ensure that the blade positioning point is in contact with the positioning block (131) and the positioning pin (133) at the same time. The blade blank is positioned at the first six points by three positioning blocks (131), two positioning pins (133) and one positioning post (135). S2. The upper clamping structure (100) and the floating positioning mechanism (300) are fixed together by the locking structure (500); S3. The adjusting parts (333) of the four auxiliary support structures (330) abut against the bottom of the blade material to form a four-point positioning, and the pressing plates (3531) of the two second pressing structures (350) abut against the two sides of the blade material to form a two-point positioning; wherein, the four-point positioning and the two-point positioning form a second six-point positioning. S4. The first six-point positioning of the blade material by the upper clamping structure (100) is converted to the second six-point positioning of the blade material by the floating positioning mechanism (300).

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