Adjustable clamp for numerical control machining of manned helicopter rotor blade

Abstract

The invention discloses an adjustable clamp for manned helicopter rotor blade numerical control machining, and relates to the technical field of machine tool clamps, the adjustable clamp comprises a positioning frame and a mounting disc, the edge of the mounting disc is provided with a detection station and a machining station corresponding to two adjacent sets of blades, the detection station is provided with an appearance measuring mechanism, and the machining station is provided with a clamping machining mechanism; the shape measuring mechanism is combined with a laser ranging probe to measure the shape of a standard blade, the clamping machining mechanism comprises supporting air cylinders distributed on a machining station, the supporting air cylinders correspond to the laser ranging probe and are distributed below the blade of the machining station, and a machining motor is installed above the blade of the machining station in a lifting mode. The appearance of a standard blade is measured through a laser ranging probe, the blade to be machined is supported and positioned through a supporting air cylinder in the clamping machining mechanism, the upper surface of the blade is machined in combination with a machining motor, and overall machining of the blade is achieved in cooperation with a posture adjusting mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machine tool fixtures, and particularly relates to an adjustable fixture for numerical control machining of rotor blades of manned helicopters. BACKGROUND

[0002] Rotor blades are key components of helicopters and other rotary-wing aircraft. The rotor blades interact with air at high speed to generate upward lift and forward thrust, thereby enabling the rotary-wing aircraft to fly. When the blades rotate, the airflow speed on the upper surface is different from that on the lower surface. According to Bernoulli's principle, the airflow speed on the upper surface is faster and the pressure is lower, while the airflow speed on the lower surface is slower and the pressure is higher, thereby generating a pressure difference and forming lift. Meanwhile, by changing the pitch of the blades, the size and direction of the lift can be controlled to realize changes in flight attitudes such as ascending, descending, advancing, retreating, and turning.

[0003] During machining of helicopter blades, the consistency of the blade shape needs to be ensured to ensure that each blade generates the same lift when rotating, thereby ensuring the stability of the helicopter. However, the existing blades are prone to positioning errors during machining due to repeated disassembly and clamping of the fixtures, which affects the machining precision of the blade shape and the consistency of the blade shape. SUMMARY

[0004] The present application aims to provide an adjustable fixture for numerical control machining of rotor blades of manned helicopters to solve the problems presented in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] An adjustable fixture for numerical control machining of rotor blades of manned helicopters, comprising a positioning frame and blades distributed at equal angles and intervals in the circumference of the positioning frame, wherein the blades are rotatably installed on a mounting disc in combination with the positioning frame, the edge of the mounting disc is provided with a detection station and a machining station corresponding to adjacent two groups of blades, the detection station is provided with a shape measuring mechanism, and the machining station is provided with a clamping machining mechanism.

[0007] The shape measuring mechanism comprises laser ranging probes distributed on the upper and lower sides of the blades, the clamping machining mechanism comprises support air cylinders distributed on the machining station, the support air cylinders are distributed below the blades of the machining station corresponding to the laser ranging probes, a machining motor is installed above the blades of the machining station through lifting, the height of the machining motor is the same as the detection height of the laser ranging probes above the blades of the detection station, the shape measuring mechanism and the clamping machining mechanism are provided with end clamping assemblies at the end of the blades, and a posture adjusting mechanism is arranged between the blades and the mounting disc.

[0008] As a further further scheme of the present application: the contour measuring mechanism comprises a mounting frame arranged at the edge of the mounting disc, the mounting frame is symmetrically arranged on the upper and lower sides of the blade, the mounting frames on the upper and lower sides are fixedly connected at the end away from the mounting disc, a drive screw one is arranged in the mounting frame on the upper and lower sides, a translation frame one is fitted and mounted on the drive screw one, the translation frame one is slidingly mounted with the mounting frame, and the laser ranging probes are uniformly arranged on the side of the translation frame one facing the blade.

[0009] As a further further scheme of the present application: the mounting frame and the blade are provided with a positioning plate, a plurality of groups of detection holes are uniformly distributed on the positioning plate, and the laser ranging probes and the detection holes correspond to each other.

[0010] As a further further scheme of the present application: the clamping machining mechanism comprises a mounting frame arranged at the machining station, the mounting frame is fixedly connected with the edge of the mounting disc, an upper frame is fixedly arranged on the upper side of the mounting frame, support cylinders are uniformly arranged on the mounting frame corresponding to the detection holes, a drive screw two is arranged on the upper frame, a translation frame two is fitted and mounted on the drive screw two, the translation frame two is slidingly mounted with the upper frame, a horizontal adjusting screw is arranged at the bottom of the translation frame two, an extension motor is fitted and mounted on the horizontal adjusting screw, and the extension motor is connected with a machining motor.

[0011] As a further further scheme of the present application: the end clamping assembly comprises two groups of vertically fixed mounting slide columns, a connecting sliding block is fitted and mounted on the mounting slide column, a telescopic cylinder one is horizontally mounted on the connecting sliding block, the telescopic cylinder one is connected with a clamping frame, a clamping cylinder is arranged in the clamping frame, and a telescopic cylinder two is vertically mounted on the upper side of the connecting sliding block.

[0012] As a further further scheme of the present application: the mounting frame on the upper side is provided with an extension frame, a support column one is arranged at the lower side of the extension frame, an annular support groove is arranged on the upper side of the mounting disc, the bottom of the support column one and the annular support groove are matched with each other, a support column two is arranged at the edge of the upper frame, and the support column two and the annular support groove are matched with each other.

[0013] As a further scheme of the present application: the posture adjusting mechanism comprises a clamping block, the end of the blade is fixedly installed with the clamping block, the clamping block is rotatably installed with the circular arc frame, the bottom of the circular arc frame is provided with a matched ball, the blade is slidably connected with the circular arc frame and the matched ball and is clamped on the upper side of the mounting disc, the upper side of the circular arc frame is provided with a positioning pin, the positioning frame is fixedly installed with the circular arc frame through the positioning pin, the clamping block is provided with a matched bevel gear on the inner side of the circular arc frame, a bevel gear disc is rotatably installed in the mounting disc, the matched bevel gear and the bevel gear disc are meshed with each other, and the bevel gear disc is connected with an adjusting motor.

[0014] As a further scheme of the present application: the blade is connected with a transposition mechanism, the transposition mechanism comprises a transposition motor arranged on the extension frame, the transposition motor is connected with a matched shaft, a driving gear is slidably installed on the matched shaft, a matched frame is arranged on the upper side of the driving gear, a lifting cylinder is arranged on the extension frame at the center axis position of the mounting disc, the end of the lifting cylinder is connected with a cross frame, an annular frame is slidably installed on the inner ring of the positioning frame, a matched column is arranged on the outer ring of the annular frame, the matched column is inserted into the inner ring of the positioning frame, an annular groove is arranged on the annular frame, the bottom of the cross frame is slidably connected with the annular groove, an inner gear ring is arranged on the upper side of the positioning frame, the driving gear and the inner gear ring are meshed with each other, a linkage frame is arranged between the lifting cylinder and the matched frame, a butt joint is arranged at the center bottom of the annular frame, a matched groove is arranged at the center of the bevel gear disc, and the butt joint and the matched groove are in lifting butt joint.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] (1) The shape data obtained by the laser ranging probe detection is sent to the clamping machining mechanism of the machining station, the height data of each point obtained by the laser ranging probe detection is obtained by the support cylinder in the clamping machining mechanism, the machining motor installed on the upper side of the blade is used to pass through each detection point in turn, and the height of the machining tool bit between each point is linearly adjusted, so that the profile machining of the blade is realized.

[0017] (2) After the data collection of the standard blade is completed, the standard blade is rotated together with the blade to be machined, and the blade machining is sequentially performed. After all the blades to be machined are machined, the standard blade returns to the detection station, the angle of the standard blade is adjusted by the posture adjusting mechanism, then the shape measurement of the standard blade is repeated, and the blade is further profile machined by the clamping machining mechanism, until the whole blade is machined.

[0018] (3) The installation frame is arranged to install the driving screw one, the driving screw one drives the translational frame one to move back and forth, and the laser ranging probe on the translational frame one measures the surface of the standard blade, and the blade data detected on the detection station is transmitted to the machining station, the blade is positioned and clamped by the clamping machining mechanism and is machined. The positioning plate is arranged to fix the ranging interval, and the ranging point can be fixed before and after the posture adjusting mechanism adjusts the posture of the blade.

[0019] (4) The turning mechanism controls the rotation of all the blades, and the unprocessed blade is rotated to the machining station to repeat the surface machining of the previous blade. When the turning is needed, the cross frame is lowered by the lifting cylinder to make the adapter and the matching groove on the bevel gear plate mutually dock, and the cross frame is lowered, the linkage frame controls the driving gear to move downward and mesh with the inner gear ring, the driving gear is rotated by the turning motor to drive the positioning frame and the bevel gear plate to rotate synchronously, and the circumferentially uniformly installed blades are rotated together, so that the bevel gear plate and the matching bevel gear are prevented from being meshed and driven during the turning of the blades, and the posture of the blade is prevented from changing during the turning of the blades. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the application.

[0021] Figure 2 It is a schematic diagram of the appearance measuring mechanism in the application.

[0022] Figure 3 It is a schematic diagram of the clamping machining mechanism in the application.

[0023] Figure 4 It is a schematic diagram of the end clamping assembly in the application.

[0024] Figure 5 It is an installation schematic diagram of the blade in the application.

[0025] Figure 6 It is a connection structure schematic diagram of the turning mechanism and the mounting disc in the application.

[0026] Figure 7 It is an installation structure schematic diagram of the clamping block in the application.

[0027] Figure 8 It is a structure schematic diagram of the turning mechanism in the application.

[0028] In the figure: 2, mounting disc; 20, positioning frame; 21, annular support groove; 3, profile measuring mechanism; 30, mounting frame; 31, positioning plate; 310, detection hole; 32, translation frame one; 33, drive screw one; 34, laser ranging probe; 35, end clamping assembly; 350, clamping frame; 351, clamping cylinder; 352, mounting slide column; 353, connecting sliding block; 354, telescopic cylinder one; 355, telescopic cylinder two; 36, extension frame; 37, support column one; 4, clamping machining mechanism; 40, mounting frame; 41, support cylinder; 42, upper frame; 43, drive screw two; 44, translation frame two; 45, transverse adjustment screw; 47, telescopic motor; 48, machining motor; 49, support column two; 5, indexing mechanism; 50, inner ring gear; 51, indexing motor; 52, matching shaft; 53, drive gear; 54, matching frame; 55, linkage frame; 56, lifting cylinder; 58, cross frame; 59, annular frame; 510, annular groove; 511, matching column; 512, butt joint; 6, blade; 60, clamping block; 61, circular arc frame; 62, matching bevel gear; 63, bevel gear disc; 64, adjustment motor; 65, positioning pin; 66, matching ball. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be further described in detail below in combination with specific embodiments.

[0030] As shown in Figure 1 , an adjustable clamp for numerical control machining of the rotor blade of a manned helicopter, comprising a positioning frame 20 and blades 6 distributed at equal angles and intervals in the circumferential direction of the positioning frame 20, the blades 6 being rotatably installed on a mounting disc 2 in combination with the positioning frame 20, the edge of the mounting disc 2 corresponding to each of two adjacent groups of blades 6 being provided with a detection station and a machining station respectively, the detection station being provided with a profile measuring mechanism 3, and the machining station being provided with a clamping machining mechanism 4.

[0031] As shown in Figure 1 , Figure 2 , the profile measuring mechanism 3 comprises laser ranging probes 34 distributed on the upper and lower sides of the blades 6, the clamping machining mechanism 4 comprises support cylinders 41 distributed on the machining station, the support cylinders 41 being distributed below the blades 6 of the machining station corresponding to the laser ranging probes 34, a machining motor 48 being installed above the blades 6 of the machining station in a lifting manner, the height of the machining motor 48 being the same as the detection height of the laser ranging probes 34 above the blades 6 of the detection station, the profile measuring mechanism 3 and the clamping machining mechanism 4 being provided with an end clamping assembly 35 at the end of the blades 6, and a posture adjusting mechanism being provided between the blades 6 and the mounting disc 2.

[0032] Specifically, the blades 6 to be processed are installed equidistantly on the circumference of the mounting disc 2, and first, the standard blade 6 is installed on the detection station, and the profile of the surface of the blade 6 is detected by the profile measuring mechanism 3 on the detection station. The profile data detected by the laser ranging probe 34 is sent to the clamping machining mechanism 4 of the machining station, the height data of each point detected by the laser ranging probe 34 is used to realize accurate support positioning of the bottom of the blade 6 by the support cylinder 41 in the clamping machining mechanism 4, and the machining motor 48 installed on the upper side of the blade 6 sequentially passes through each detection point and linearly adjusts the height of the machining tool bit between each point to realize the profiling machining of the blade 6.

[0033] More specifically, after the standard blade 6 completes data collection, the standard blade 6 rotates together with the blades 6 to be processed, and the blades 6 are processed in turn. After all the blades 6 to be processed are completed, the standard blade 6 is returned to the detection station, the angle of the standard blade 6 is adjusted by the posture adjusting mechanism, and then the profile of the standard blade 6 is measured again, and the blade 6 is further profiled by the clamping machining mechanism 4 until the whole blade 6 is completed.

[0034] More specifically, in combination with Figure 2 、 Figure 3 、 Figure 6 , the posture adjusting mechanism includes a bevel gear disc 63 rotatably installed in the mounting disc 2, the bevel gear disc 63 is driven to rotate by the adjusting motor 64, and the mating bevel gear 62 meshing with the edge of the bevel gear disc 63 is driven to rotate, the mating bevel gear 62 clamps the blade 6 in combination with the clamping block 60, and the blade 6 is rotated in synchronization by the bevel gear disc 63, so that the postures of all the blades 6 are adjusted synchronously, which facilitates multi-angle profile measurement of the standard blade 6 on the detection station and multi-angle profile machining of the blade 6 on the machining station, improves the machining precision and machinable angle of the blade 6, and further reduces the disassembly and assembly times of the blade 6.

[0035] Further, as shown in Figure 1 、 Figure 2 , the profile measuring mechanism 3 includes a mounting frame 30 arranged at the edge of the mounting disc 2, the mounting frame 30 is symmetrically arranged on the upper and lower sides of the blade 6, and the mounting frame 30 on the upper and lower sides is fixedly connected at the end away from the mounting disc 2, a drive screw 33 is arranged in the mounting frame 30 on the upper and lower sides, a translation frame 32 is cooperatively arranged on the drive screw 33, the translation frame 32 is slidingly installed between the mounting frame 30, and the laser ranging probe 34 is uniformly arranged on the side of the translation frame 32 facing the blade 6.

[0036] Further, as shown in Figure 2As shown, the mounting frame 30 and the blade 6 are provided with a positioning plate 31, and a plurality of groups of detection holes 310 are uniformly distributed on the positioning plate 31, and the laser ranging probe 34 and the detection hole 310 correspond to each other.

[0037] Specifically, the driving screw 33 is installed by setting the mounting frame 30, the driving screw 33 drives the translational frame 32 to move back and forth, the laser ranging probe 34 on the translational frame 32 measures the surface of the standard blade 6, the blade 6 data detected on the detection station is transmitted to the processing station, and the blade 6 is positioned and clamped by the clamping processing mechanism 4 and processed. The ranging point is fixed before and after the posture adjusting mechanism adjusts the posture of the blade 6 by setting the ranging interval.

[0038] Further, as shown in Figure 1 、 Figure 3 The clamping processing mechanism 4 includes a mounting frame 40 arranged at the processing station, the mounting frame 40 is fixedly connected with the edge of the mounting disc 2, an upper frame 42 is fixedly arranged on the upper side of the mounting frame 40, support cylinders 41 are uniformly arranged on the mounting frame 40 corresponding to the detection holes 310, a driving screw 43 is arranged on the upper frame 42, a translational frame 44 is fitted and mounted on the driving screw 43, the translational frame 44 is slidingly mounted between the upper frame 42, a horizontal adjustment screw 45 is arranged on the bottom of the translational frame 44, a telescopic motor 47 is fitted and mounted on the horizontal adjustment screw 45, and a processing motor 48 is connected with the telescopic motor 47.

[0039] Specifically, the bottom of the blade 6 to be processed is supported and positioned by the uniformly arranged support cylinders 41, each group of support cylinders 41 corresponds to the distance of the standard blade 6 measured by the laser ranging at the corresponding point, the extension length of the support cylinder 41 is equal to the distance data measured, the processing motor 48 moves back and forth by the driving screw 43, and the distance data of the standard blade 6 is measured above the contour measuring mechanism 3, the height of the corresponding ranging point is adjusted in sequence during the processing of the processing motor 48, so that the surface of the blade 6 to be processed is processed.

[0040] Further, as shown in Figure 4 The end clamping assembly 35 includes two groups of vertically fixed mounting slide columns 352, a connecting slide block 353 is fitted and mounted on the mounting slide column 352, a telescopic cylinder 354 is horizontally mounted on the connecting slide block 353, a clamping frame 350 is connected with the telescopic cylinder 354, a clamping cylinder 351 is arranged in the clamping frame 350, and a telescopic cylinder 355 is vertically mounted on the upper side of the connecting slide block 353.

[0041] Specifically, in order to avoid the blade 6 end from falling due to its own gravity, the blade 6 end is clamped and fixed by the end clamping assembly 35, so as to ensure the consistent posture of the blade 6 in the detection station and the machining station, and ensure the reliable fixation of the blade 6 in the machining process. The clamping and fixation of the blade 6 end is realized by the clamping frame 350 and the clamping cylinder 351, and the posture adjustment mechanism is dynamically adjusted and positioned together with the blade 6 posture in cooperation with the first telescopic cylinder 354 and the second telescopic cylinder 355.

[0042] Further, as shown in Figure 2 、 Figure 3 、 Figure 5 , the upper mounting frame 30 is provided with an extension frame 36, the lower side of the extension frame 36 is provided with a support column 37, the upper side of the mounting disc 2 is provided with an annular support groove 21, the bottom of the support column 37 and the annular support groove 21 are matched with each other, and the edge of the upper frame 42 is provided with a support column 49, which is matched with the annular support groove 21.

[0043] Specifically, in order to ensure the stability of the profile measurement mechanism 3 and the clamping machining mechanism 4 during the indexing machining of the blade 6, the upper mounting frame 30 and the upper frame 42 are respectively supported and positioned by the support column 37 and the support column 49, so as to ensure the stable installation of the laser distance probe 34 and the machining motor 48.

[0044] Further, as shown in Figure 6 、 Figure 7 , the posture adjustment mechanism comprises a clamping block 60, the end of the blade 6 is fixedly installed with the clamping block 60, the clamping block 60 is rotatably installed with a circular arc frame 61, the bottom of the circular arc frame 61 is provided with a matching ball 66, the blade 6 is slidably connected on the upper side of the mounting disc 2 in cooperation with the circular arc frame 61 and the matching ball 66, the upper side of the circular arc frame 61 is provided with a positioning pin 65, the positioning frame 20 is fixedly installed with the circular arc frame 61 through the positioning pin 65, the clamping block 60 located on the inner side of the circular arc frame 61 is provided with a matching bevel gear 62, a bevel gear disc 63 is rotatably installed in the mounting disc 2, the matching bevel gear 62 and the bevel gear disc 63 are meshed with each other, and the bevel gear disc 63 is connected with an adjustment motor 64.

[0045] Specifically, since the surface of the blade 6 is irregularly shaped, and the edge and back of the blade 6 cannot be formed by one-time machining, the angle of the blade 6 needs to be adjusted multiple times to complete the machining of the blade 6. The synchronous posture control of all blades 6 is realized by the bevel gear disc 63 and the matching bevel gear 62, and after the posture adjustment of the blade 6, the surface machining is performed again in cooperation with the clamping machining mechanism 4.

[0046] Further, as shown inFigure 5 、 Figure 8 As shown in the figure, the blade 6 is connected with a indexing mechanism 5, the indexing mechanism 5 includes an indexing motor 51 arranged on an extension frame 36, the indexing motor 51 is connected with a matched shaft 52, the matched shaft 52 is slidingly installed with a driving gear 53, the driving gear 53 is provided with a matched frame 54 on the upper side, the extension frame 36 is provided with a lifting cylinder 56 at the center axis part of the mounting disc 2, the end of the lifting cylinder 56 is connected with a cross frame 58, the inner ring of the positioning frame 20 is slidingly installed with an annular frame 59, the outer ring of the annular frame 59 is provided with a matched column 511, the matched column 511 is inserted with the inner ring of the positioning frame 20, the annular frame 59 is provided with an annular groove 510, the bottom of the cross frame 58 is slidingly connected with the annular groove 510, the upper side of the positioning frame 20 is provided with an internal tooth ring 50, the driving gear 53 is engaged with the internal tooth ring 50, the lifting cylinder 56 is provided with a linkage frame 55 between the matched frame 54, the center bottom of the annular frame 59 is provided with a butt joint 512, the center of the bevel gear disc 63 is provided with a matched groove, the butt joint 512 is liftingly butted with the matched groove.

[0047] Specifically, after the blade 6 of the machining station completes surface machining, all the blades 6 are controlled to rotate through the indexing mechanism 5, the unprocessed blade 6 is rotated to the machining station, and the surface machining of the previous blade 6 is repeated. When indexing is needed, the cross frame 58 is lowered by combining the lifting cylinder 56, so that the butt joint 512 and the matched groove on the bevel gear disc 63 are mutually butted, the cross frame 58 is lowered, at the same time, the linkage frame 55 combines the matched frame 54 to control the driving gear 53 to move downward and be engaged with the internal tooth ring 50, when the indexing motor 51 drives the driving gear 53 to rotate, the positioning frame 20 and the bevel gear disc 63 are synchronously rotated, and the circumferentially uniformly installed blade 6 is rotated together, so that the bevel gear disc 63 and the matched bevel gear 62 are prevented from being engaged and driven in the process of indexing the blade 6, and the posture of the blade 6 is prevented from changing in the process of indexing the blade 6.

[0048] The working principle of the embodiment of the application is:

[0049] As Figures 1-8The standard blade 6 is distributed equidistantly on the circumference of the mounting disc 2, and is first installed on the detection station. The profile measuring mechanism 3 on the detection station detects the profile of the surface of the blade 6. The profile data obtained by the laser ranging probe 34 is transmitted to the clamping machining mechanism 4 of the machining station. The support cylinder 41 of the clamping machining mechanism 4 and the laser ranging probe 34 detect the height data of each point, and realize the accurate support positioning of the bottom of the blade 6. The machining motor 48 installed on the upper side of the blade 6 sequentially passes through each detection point, and linearly adjusts the height of the machining tool bit between each point, so as to realize the profiling machining of the blade 6. After the data collection of the standard blade 6 is completed, the standard blade 6 rotates together with the blade 6 to be machined, and the blade 6 is machined in turn. After the machining of all the blades 6 to be machined is completed, the standard blade 6 returns to the detection station, and the angle adjustment mechanism adjusts the angle of the standard blade 6. Then, the profile of the standard blade 6 is measured again, and the blade 6 is further machined by the clamping machining mechanism 4, until the machining of the blade 6 is completed. The mounting frame 30 is provided with the driving screw 33, and the laser ranging probe 34 on the translation frame 32 moves back and forth, so as to detect the surface of the standard blade 6. The data of the blade 6 detected on the detection station is transmitted to the machining station, and the blade 6 is positioned and clamped by the clamping machining mechanism 4, and is machined. The positioning plate 31 fixes the ranging interval, so as to ensure the fixation of the ranging point before and after the adjustment of the attitude adjustment mechanism. After the surface machining of the blade 6 on the machining station is completed, the rotation mechanism 5 controls the rotation of all the blades 6, so as to rotate the unprocessed blade 6 to the machining station, and the surface machining of the previous blade 6 is repeated. When rotation is needed, the cross frame 58 falls under the control of the lifting cylinder 56, so that the joint 512 is matched with the matching groove on the bevel gear disc 63. At the same time, the linkage frame 55 controls the driving gear 53 to move downward and mesh with the internal tooth ring 50 under the control of the matching frame 54. When the rotation motor 51 drives the driving gear 53 to rotate, the positioning frame 20 and the bevel gear disc 63 rotate synchronously, and the circumferentially and uniformly installed blades 6 rotate together, so as to avoid the meshing and driving between the bevel gear disc 63 and the matching bevel gear 62 in the process of rotation of the blade 6, and ensure that the attitude of the blade 6 does not change in the process of rotation of the blade 6.

[0050] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. Any figure reference in the claims shall not be regarded as a limitation of the involved claims.

[0051] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. An adjustable fixture for numerical control machining of a manned helicopter rotor blade, comprising a positioning frame (20) and blades (6) distributed at equal angles along the circumference of the positioning frame (20), the blades (6) being rotatably mounted on a mounting disc (2) in combination with the positioning frame (20), characterized in that, The edge of the mounting disc (2) is provided with a detection station and a machining station corresponding to the adjacent two groups of blades (6), the detection station is provided with an appearance measuring mechanism (3), and the machining station is provided with a clamping machining mechanism (4); The appearance measuring mechanism (3) comprises laser ranging probes (34) which are arranged on the upper and lower sides of the blade (6), the clamping machining mechanism (4) comprises support air cylinders (41) which are arranged on the machining station, the support air cylinders (41) are arranged below the machining station blade (6) corresponding to the laser ranging probes (34), a machining motor (48) is arranged on the upper side of the machining station blade (6) and is capable of ascending and descending, the height of the machining motor (48) is the same as the detection height of the laser ranging probe (34) on the upper side of the detection station blade (6), the appearance measuring mechanism (3) and the clamping machining mechanism (4) are provided with end clamping assemblies (35) at the ends of the blade (6), and a posture adjusting mechanism is arranged between the blade (6) and the mounting disc (2).

2. The adjustable fixture for numerically controlled machining of a manned helicopter rotor blade according to claim 1, characterized in that, The appearance measuring mechanism (3) comprises a mounting frame (30) arranged at the edge of the mounting disc (2), the mounting frame (30) is symmetrically arranged on the upper and lower sides of the blade (6), one end of the mounting frame (30) on the upper and lower sides is fixedly connected away from the mounting disc (2), a drive screw one (33) is arranged in the mounting frame (30) on the upper and lower sides, a translation frame one (32) is movably arranged on the drive screw one (33), and the laser ranging probes (34) are uniformly arranged on one side of the translation frame one (32) facing the blade (6).

3. The adjustable fixture for numerically controlled machining of a manned helicopter rotor blade according to claim 2, characterized in that, A positioning plate (31) is arranged between the mounting frame (30) and the blade (6), a plurality of detection holes (310) are uniformly arranged on the positioning plate (31), and the laser ranging probes (34) correspond to the detection holes (310).

4. The adjustable fixture for numerically controlled machining of a manned helicopter rotor blade according to claim 3, characterized in that, The clamping machining mechanism (4) comprises a mounting frame (40) arranged on the machining station, the mounting frame (40) is fixedly connected with the edge of the mounting disc (2), an upper frame (42) is fixedly arranged on the upper side of the mounting frame (40), support air cylinders (41) are uniformly arranged on the mounting frame (40) corresponding to the detection holes (310), a drive screw two (43) is arranged on the upper frame (42), a translation frame two (44) is movably arranged on the drive screw two (43), a horizontal adjusting screw (45) is arranged at the bottom of the translation frame two (44), an extension motor (47) is movably arranged on the horizontal adjusting screw (45), and the extension motor (47) is connected with the machining motor (48).

5. The adjustable fixture for numerically controlled machining of a manned helicopter rotor blade according to claim 1, characterized in that, The end clamping assembly (35) comprises two groups of vertically fixedly installed mounting slide columns (352), connecting slide blocks (353) are mounted on the mounting slide columns (352) in a matched mode, telescopic cylinders I (354) are horizontally mounted on the connecting slide blocks (353), clamping frames (350) are connected with the telescopic cylinders I (354), clamping cylinders (351) are arranged in the clamping frames (350), and telescopic cylinders II (355) are vertically mounted on the upper sides of the connecting slide blocks (353).

6. The adjustable fixture for numerically controlled machining of a manned helicopter rotor blade according to claim 4, characterized in that, The upper mounting frame (30) is provided with an extension frame (36), the lower side of the extension frame (36) is provided with a supporting column I (37), the upper side of the mounting disc (2) is provided with an annular supporting groove (21), the bottom of the supporting column I (37) and the annular supporting groove (21) are matched with each other, the edge of the upper frame (42) is provided with a supporting column II (49), and the supporting column II (49) and the annular supporting groove (21) are matched with each other.

7. The adjustable fixture for numerically controlled machining of a manned helicopter rotor blade according to claim 6, characterized in that, The posture adjusting mechanism comprises a clamping block (60), the end of the blade (6) is fixedly installed between the clamping block (60), the clamping block (60) is rotationally installed between the circular arc frame (61), the bottom of the circular arc frame (61) is provided with matched ball bearings (66), the blade (6) is slidably clamped on the upper side of the mounting disc (2) in combination with the circular arc frame (61) and the matched ball bearings (66), the upper side of the circular arc frame (61) is provided with a positioning pin (65), the positioning frame (20) and the circular arc frame (61) are fixedly installed through the positioning pin (65), the clamping block (60) is provided with a matched bevel gear (62) on the inner side of the circular arc frame (61), a bevel gear disc (63) is rotationally installed in the mounting disc (2), the matched bevel gear (62) and the bevel gear disc (63) are meshed with each other, and the bevel gear disc (63) is connected with an adjusting motor (64).

8. The adjustable fixture for numerically controlled machining of a manned helicopter rotor blade according to claim 7, characterized in that, The blade (6) is connected with a indexing mechanism (5), the indexing mechanism (5) includes the indexing motor (51) arranged on the extension frame (36), the indexing motor (51) is connected with the matching shaft (52), the matching shaft (52) is slidably installed with the drive gear (53), the drive gear (53) is provided with the matching frame (54) on the upper side, the extension frame (36) is provided with the lifting cylinder (56) on the central axis part of the mounting disc (2), the end of the lifting cylinder (56) is connected with the cross frame (58), the inner ring of the positioning frame (20) is slidably installed with the annular frame (59), the outer ring of the annular frame (59) is provided with the matching column (511), the matching column (511) is inserted with the inner ring of the positioning frame (20), the annular frame (59) is provided with the annular groove (510), the bottom of the cross frame (58) and the annular groove (510) are slidably connected, the upper side of the positioning frame (20) is provided with the internal tooth ring (50), the drive gear (53) and the internal tooth ring (50) are engaged with each other, the lifting cylinder (56) and the matching frame (54) are provided with the linkage frame (55), the central bottom of the annular frame (59) is provided with the butt joint (512), the center of the bevel gear disc (63) is provided with the matching groove, the butt joint (512) and the matching groove are connected in the lifting mode.

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