A special fixture for three-dimensional optical measurement of an integral blisk of a fan

Abstract

A special fixture for three-dimensional optical measurement of a fan integral blisk, comprising a positioning and supporting component, a supporting column component, an upper marking ring component and a lower marking ring component; the lower marking ring component is located at the top of the supporting column component; the positioning and supporting component is located at the top of the supporting column component and above the lower marking ring component; the upper marking ring component is located at the top of the positioning and supporting component; the fan integral blisk part is located between the upper marking ring component and the lower marking ring component; the positioning and supporting component includes an adapter sleeve, a part centering and supporting sleeve, a plug cover, a part pressing cover and a lifting ring bolt; the supporting column component includes a disc base, a column and an adapter support; the upper marking ring component includes an upper support ring, an upper marking point sticker pasting claw, an auxiliary support rod and an upper positioning support plate; the lower marking ring component includes a lower support ring, a lower marking point sticker pasting claw and a lower positioning support plate. The invention has no shielding effect on the fan integral blisk part during the powder spraying process and can obtain a three-dimensional point cloud with higher density.

Description

Technical Field

[0001] The present invention belongs to the technical field of manufacturing parts of aero-engines, and particularly relates to a special fixture for three-dimensional optical measurement of an integral bladed disk of a fan. Background Art

[0002] After the integral bladed disk of the fan of the aero-engine completes the machining process, it is necessary to use a three-dimensional optical measuring instrument to perform three-dimensional point cloud scanning to generate a three-dimensional model of the integral bladed disk of the fan, and then compare the three-dimensional model of the integral bladed disk of the fan with the theoretical model to display the error values of each part of the machined integral bladed disk part of the fan.

[0003] Before performing three-dimensional optical measurement on the integral bladed disk part of the fan, it is also necessary to evenly powder all the inspection surfaces of the integral bladed disk part of the fan. However, the traditional fixture will block the integral bladed disk part of the fan during the powder spraying process, and the dot matrix density of the fixture is relatively low, and the turnover and lifting flexibility of the integral bladed disk part of the fan are poor, and it has been difficult to meet the three-dimensional optical measurement requirements of the integral bladed disk of the fan. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a special fixture for three-dimensional optical measurement of an integral bladed disk of a fan, which will not block the integral bladed disk part of the fan during the powder spraying process, can obtain a three-dimensional point cloud with a higher density, and can more flexibly realize the turnover and lifting of the integral bladed disk part of the fan.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a special fixture for three-dimensional optical measurement of an integral bladed disk of a fan, comprising a positioning and supporting component, a supporting column component, an upper marking ring component and a lower marking ring component; the lower marking ring component is located at the top of the supporting column component; the positioning and supporting component is located at the top of the supporting column component and above the lower marking ring component; the upper marking ring component is located at the top of the positioning and supporting component; the integral bladed disk part of the fan is located between the upper marking ring component and the lower marking ring component.

[0006] The positioning and supporting component includes a transition sleeve, a part centering and supporting sleeve, a plug cover, a part pressing cover and a lifting eye bolt; the inner hole of the transition sleeve adopts a two-stage stepped structure, and the two-stage stepped inner holes of the transition sleeve are both threaded holes, the small-diameter threaded hole of the transition sleeve is on the top and the large-diameter threaded hole is on the bottom; an annular supporting edge is fixedly arranged on the outer surface of the transition sleeve; the part centering and supporting sleeve is located above the annular supporting edge, and the part centering and supporting sleeve is coaxially fixedly sleeved and connected with the transition sleeve; the plug cover is coaxially fixedly screwed on the top pipe orifice of the part centering and supporting sleeve, and a lifting eye bolt threaded hole is opened in the center of the plug cover; the part pressing cover is located between the plug cover and the lifting eye bolt; the integral bladed disk part of the fan is sleeved outside the part centering and supporting sleeve.

[0007] The support column assembly includes a disc base, a column, and a transfer support; the column is vertically and fixedly installed at the center of the disc base; the transfer support is located at the top of the column, and the transfer support adopts a two-stage stepped cylindrical structure, with the large-diameter section at the bottom and the small-diameter section at the top; the top of the column is fixedly connected to the bottom of the large-diameter section of the transfer support; an external thread is provided on the outer surface of the small-diameter end of the transfer support, and the large-diameter threaded hole of the transfer sleeve is screwed and matched with the small-diameter end of the transfer support; a first positioning pin is provided between the transfer sleeve and the small-diameter section of the transfer support.

[0008] The upper marking ring assembly includes an upper support ring, upper marking point sticker pasting claws, auxiliary support rods, and an upper positioning support plate; the upper positioning support plate is located between the part gland and the fan integral blisk part; the upper support ring is located below the upper positioning support plate, and the upper support ring and the upper positioning support plate are fixedly connected by auxiliary support rods; the upper marking point sticker pasting claws are horizontally and fixedly connected to the upper support ring, and the upper marking point sticker pasting claws adopt an elongated rod-shaped structure; the number of the upper marking point sticker pasting claws is several, and several upper marking point sticker pasting claws are evenly arranged along the circumferential direction of the upper support ring, and several upper marking point sticker pasting claws form a radial structure on the upper support ring.

[0009] The lower marking ring assembly includes a lower support ring, lower marking point sticker pasting claws, and a lower positioning support plate; the lower positioning support plate is coaxially sleeved outside the large-diameter section of the transfer support, and a second positioning pin is provided between the lower positioning support plate and the transfer support; the lower marking point sticker pasting claws are horizontally and fixedly connected to the lower support ring, and the lower marking point sticker pasting claws adopt an elongated rod-shaped structure; the number of the lower marking point sticker pasting claws is several, and several lower marking point sticker pasting claws are evenly arranged along the circumferential direction of the lower support ring, and several lower marking point sticker pasting claws form a radial structure on the lower support ring; a non-metallic part angular position limiting pin is vertically fixed on the lower support ring.

[0010] The beneficial effects of the present invention:

[0011] The special fixture for three-dimensional optical measurement of the fan integral blisk of the present invention will not block the fan integral blisk part during the powder spraying process, can obtain a higher density of three-dimensional point clouds, and can more flexibly realize the turnover and hoisting of the fan integral blisk part. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of a special fixture for three-dimensional optical measurement of a fan integral blisk of the present invention;

[0013] Figure 2 It is a schematic structural diagram of the positioning and support assembly of the present invention;

[0014] Figure 3Schematic structural diagram of the support column assembly of the present invention;

[0015] Figure 4 Schematic structural diagram of the upper marking ring assembly of the present invention;

[0016] Figure 5 Schematic structural diagram of the lower marking ring assembly of the present invention;

[0017] Figure 6 State diagram when the integral fan blisk part is optically detected by the present invention;

[0018] Figure 7 State diagram when the integral fan blisk part is powder spraying operation by the present invention.

[0019] In the figure, I - positioning support assembly, II - support column assembly, III - upper marking ring assembly, IV - lower marking ring assembly, 1 - integral fan blisk part, 2 - adapter sleeve, 3 - part centering support sleeve, 4 - plug cover, 5 - part pressing cover, 6 - lifting eye bolt, 7 - annular support edge, 8 - disc base, 9 - column, 10 - adapter support, 11 - upper support ring, 12 - upper marking point sticker pasting claw, 13 - auxiliary support rod, 14 - upper positioning support plate, 15 - lower support ring, 16 - lower marking point sticker pasting claw, 17 - lower positioning support plate, 18 - first positioning pin, 19 - second positioning pin, 20 - part positioning disc, 21 - handle, 22 - part pressing stud, 23 - part angular limit pin. Detailed implementation manners

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] As Figures 1 to 7 shown, a special fixture for three-dimensional optical measurement of an integral fan blisk includes a positioning support assembly I, a support column assembly II, an upper marking ring assembly III and a lower marking ring assembly IV; the lower marking ring assembly IV is located at the top of the support column assembly II; the positioning support assembly I is located at the top of the support column assembly II and above the lower marking ring assembly IV; the upper marking ring assembly III is located at the top of the positioning support assembly I; the integral fan blisk part 1 is located between the upper marking ring assembly III and the lower marking ring assembly IV.

[0022] The positioning and supporting component I includes an adapter sleeve 2, a part centering and supporting sleeve 3, a plug cover 4, a part pressing cover 5 and a lifting eye bolt 6; the inner hole of the adapter sleeve 2 adopts a two-stage stepped structure, and the two-stage stepped inner holes of the adapter sleeve 2 are both threaded holes, with the small-diameter threaded hole of the adapter sleeve 2 on the upper side and the large-diameter threaded hole on the lower side; an annular supporting edge 7 is fixedly arranged on the outer surface of the adapter sleeve 2; the part centering and supporting sleeve 3 is located above the annular supporting edge 7, and the part centering and supporting sleeve 3 is fixedly sleeved and connected with the adapter sleeve 2 coaxially; the plug cover 4 is coaxially and fixedly screwed on the top pipe orifice of the part centering and supporting sleeve 3, and a lifting eye bolt screw hole is provided at the center of the plug cover 4; the part pressing cover 5 is located between the plug cover 4 and the lifting eye bolt 6; the integral fan blisk part 1 is sleeved outside the part centering and supporting sleeve 3.

[0023] The supporting column component II includes a disc-shaped base 8, a column 9 and an adapter support 10; the column 9 is vertically and fixedly installed at the center of the disc-shaped base 8; the adapter support 10 is located at the top of the column 9, and the adapter support 10 adopts a two-stage stepped cylindrical structure, with the large-diameter section at the lower side and the small-diameter section at the upper side; the top of the column 9 is fixedly connected to the bottom of the large-diameter section of the adapter support 10; an external thread is provided on the outer surface of the small-diameter end of the adapter support 10, and the large-diameter threaded hole of the adapter sleeve 2 is screwed and matched with the small-diameter end of the adapter support 10; a first positioning pin 18 is provided between the adapter sleeve 2 and the small-diameter section of the adapter support 10.

[0024] The upper marking ring component III includes an upper support ring 11, an upper marking point sticker pasting claw 12, an auxiliary support rod 13 and an upper positioning support plate 14; the upper positioning support plate 14 is located between the part pressing cover 5 and the integral fan blisk part 1; the upper support ring 11 is located below the upper positioning support plate 14, and the upper support ring 11 is fixedly connected to the upper positioning support plate 14 through the auxiliary support rod 13; the upper marking point sticker pasting claw 12 is horizontally fixedly connected to the upper support ring 11, and the upper marking point sticker pasting claw 12 adopts a slender rod-shaped structure; the number of the upper marking point sticker pasting claws 12 is several, and several upper marking point sticker pasting claws 12 are evenly arranged along the circumferential direction of the upper support ring 11, and several upper marking point sticker pasting claws 12 form a radial structure on the upper support ring 11.

[0025] The lower marking ring assembly IV includes a lower support ring 15, a lower marking point sticker pasting claw 16 and a lower positioning support plate 17; the lower positioning support plate 17 is coaxially mounted on the outer side of the large diameter section of the adapter support 10, and a second positioning pin 19 is provided between the lower positioning support plate 17 and the adapter support 10; the lower marking point sticker pasting claw 16 is horizontally fixed to the lower support ring 15, and the lower marking point sticker pasting claw 16 adopts a slender rod-shaped structure; the number of the lower marking point sticker pasting claws 16 is several, and the several lower marking point sticker pasting claws 16 are evenly arranged along the circumferential direction of the lower support ring 15, and the several lower marking point sticker pasting claws 16 form a radial structure on the lower support ring 15; the part angular limit pin 23 is vertically fixed on the lower support ring 15. Specifically, the part angular limit pin 23 should be a limit pin made of non-metallic material to avoid hard collision damage to the part.

[0026] The following describes a one-time use process of the present invention in conjunction with the accompanying drawings:

[0027] Before the fan blisk part 1 is subjected to the powder spraying process, the fan blisk part 1 needs to be transferred to the powder spraying vehicle, but before the fan blisk part 1 is transferred, the fan blisk part 1 needs to be installed on the positioning support assembly 1. Specifically, the fan blisk part 1 is firstly mounted on the outside of the part centering support sleeve 3 to realize the centering of the fan blisk part 1. At this time, the fan blisk part 1 is temporarily supported by the annular support edge 7, and then the part gland 5 and the eye bolt 6 are sequentially installed on the top of the part centering support sleeve 3, and then the eye bolt 6 is tightened.

[0028] When the above preparations are completed, the positioning support assembly I and the fan integral blade disk part 1 are lifted as a whole with the help of the eye bolt 6, and accurately hoisted onto the part positioning disk 20 of the powder spraying vehicle. At this time, the fan integral blade disk part 1 is positioned as a whole by the part positioning disk 20, and then the part clamping stud 22 on the powder spraying vehicle is rotated by the handle 21 to make the part clamping stud 22 screwed into the small-diameter threaded hole of the adapter sleeve 2 from the bottom of the center of the part positioning disk 20, and by screwing the part clamping stud 22, the adapter sleeve 2, the part centering support sleeve 3, the plug cover 4, the part pressure cover 5 and the eye bolt 6 are moved downward as a whole, and finally the fan integral blade disk part 1 is pressed onto the part positioning disk 20 by the part pressure cover 5, and then the fan integral blade disk part 1 can be powder sprayed.

[0029] After the powder spraying process of the integral fan impeller part 1 is completed, first loosen and remove the part pressing stud 22 to release the axial pressing of the integral fan impeller part 1. Then, once again, use the eyebolt 6 to lift the integral fan impeller part 1 that has completed powder spraying together with the positioning support assembly I off the powder spraying vehicle and transfer it to the adapter support 10 on which the lower marking ring assembly IV has been installed. Subsequently, screw the large-diameter threaded hole of the adapter sleeve 2 onto the small-diameter end of the adapter support 10 until the lower end face of the integral fan impeller part 1 sits on the lower positioning support plate 17, and at the same time, the integral fan impeller part 1 is disengaged from contact with the annular support edge 7. Finally, install the first positioning pin 18 between the adapter sleeve 2 and the adapter support 10.

[0030] After the integral fan impeller part 1 completes the second transfer, first remove the eyebolt 6 and the part gland 5, then install the upper marking ring assembly III above the integral fan impeller part 1, and then install the part gland 5 and the eyebolt 6 back in sequence. However, do not tighten the eyebolt 6 at this time. First, rotate and adjust the rotational position of the integral fan impeller part 1 until the part angular position limiting pin 23 on the lower support ring 15 abuts against the integral fan impeller part 1. Finally, tighten the eyebolt 6 to press the integral fan impeller part 1 between the part gland 5 and the lower positioning support plate 17. When all the above operations are completed, the three-dimensional optical inspection work can be started.

[0031] The solutions in the embodiments are not intended to limit the scope of patent protection of the present invention. Any equivalent implementation or change without departing from the present invention is included in the patent scope of this case.

Claims

1. A special fixture for three-dimensional optical measurement of a fan integral blisk, characterized in that: It includes a positioning and supporting component, a supporting column component, an upper marking ring component and a lower marking ring component; the lower marking ring component is located at the top of the supporting column component; the positioning and supporting component is located at the top of the supporting column component and above the lower marking ring component; the upper marking ring component is located at the top of the positioning and supporting component; the fan integral blisk part is located between the upper marking ring component and the lower marking ring component; The positioning and supporting component includes a transition sleeve, a part centering and supporting sleeve, a plug cover, a part pressing cover and a lifting eye bolt; the inner hole of the transition sleeve adopts a two-stage stepped structure, and the two-stage stepped inner holes of the transition sleeve are both threaded holes. The small-diameter threaded hole of the transition sleeve is on the upper side and the large-diameter threaded hole is on the lower side; an annular supporting edge is fixedly arranged on the outer surface of the transition sleeve; the part centering and supporting sleeve is located above the annular supporting edge, and the part centering and supporting sleeve is coaxially and fixedly sleeved and connected with the transition sleeve; the plug cover is coaxially and fixedly screwed on the top pipe orifice of the part centering and supporting sleeve, and a lifting eye bolt screwing hole is arranged at the center of the plug cover; the part pressing cover is located between the plug cover and the lifting eye bolt; the fan integral blisk part is sleeved on the outside of the part centering and supporting sleeve; The supporting column component includes a disc-shaped base, a column and a transition support; the column is vertically fixedly installed at the center of the disc-shaped base; the transition support is located at the top of the column, and the transition support adopts a two-stage stepped cylindrical structure, with the large-diameter section at the lower side and the small-diameter section at the upper side; the top of the column is fixedly connected to the bottom of the large-diameter section of the transition support; an external thread is provided on the outer surface of the small-diameter end of the transition support, and the large-diameter threaded hole of the transition sleeve is screwed and matched with the small-diameter end of the transition support; a first positioning pin is arranged between the transition sleeve and the small-diameter section of the transition support; The upper marking ring component includes an upper support ring, upper marking point sticker pasting claws, auxiliary support rods and an upper positioning support plate; the upper positioning support plate is located between the part pressing cover and the fan integral blisk part; the upper support ring is located below the upper positioning support plate, and the upper support ring and the upper positioning support plate are fixedly connected by auxiliary support rods; the upper marking point sticker pasting claws are horizontally fixedly connected to the upper support ring, and the upper marking point sticker pasting claws adopt an elongated rod-shaped structure; the number of the upper marking point sticker pasting claws is several, and several upper marking point sticker pasting claws are evenly arranged along the circumferential direction of the upper support ring, and several upper marking point sticker pasting claws form a radial structure on the upper support ring; The lower marking ring component includes a lower support ring, lower marking point sticker pasting claws and a lower positioning support plate; the lower positioning support plate is coaxially sleeved on the outside of the large-diameter section of the transition support, and a second positioning pin is arranged between the lower positioning support plate and the transition support; the lower marking point sticker pasting claws are horizontally fixedly connected to the lower support ring, and the lower marking point sticker pasting claws adopt an elongated rod-shaped structure; the number of the lower marking point sticker pasting claws is several, and several lower marking point sticker pasting claws are evenly arranged along the circumferential direction of the lower support ring, and several lower marking point sticker pasting claws form a radial structure on the lower support ring; a part angular position limiting pin is vertically fixedly arranged on the lower support ring.

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