A guide vane machining clamping device and guide vane positioning method

Abstract

The application discloses a guide vane machining clamping device and a guide vane positioning method, and belongs to the technical field of aero-engine part machining, and comprises a base, a pressing mechanism, a vane basin rim plate supporting assembly and a bottom supporting assembly are arranged on the base, a vertical positioning assembly, the vertical positioning assembly comprises B4 positioning blocks and B5 positioning blocks, a radial positioning assembly, the radial positioning assembly comprises A1 positioning pins, A2 positioning pins and A3 positioning pins, an angular positioning assembly, the angular positioning assembly comprises C6 positioning pins, the C6 positioning pins are arranged on the base, and the C6 positioning pins are used for supporting positioning points on a guide vane back surface to limit angular tilting movement of the guide vane. The six-point positioning is reasonable, stable and reliable, the auxiliary support and the pressing mechanism are convenient to operate and simple to manufacture, the vane can be quickly clamped and positioned, and the exhaust edge reference end face and the inner and outer circular arc reference surface of the upper and lower rim plates of the guide vane part can be machined at one time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aircraft engine part machining, in particular, to a guide vane machining clamping device. In addition, the present application also relates to a guide vane positioning method comprising the guide vane machining clamping device. BACKGROUND

[0002] The information provided in this section is for the purpose of generally presenting the context of the application. The work of the presently named inventors, to the extent the descriptions are described in this section, as well as the descriptions of aspects that can not constitute prior art at the time of filing, are neither expressly nor impliedly admitted to be prior art against the application.

[0003] In the field of aircraft engine technology, a certain type of low-pressure turbine guide vane is a multi-leaf vane made of integral precision casting. The vane has no effective positioning reference surface at the blank stage, and can only rely on six reference points of the blank for machining reference conversion. The machining of the edge plate end surface and the outer circle reference of the part is the key process for converting the blank reference to the machining reference, and is the basis for ensuring the machining quality of the vane, and is also the difficulty of guide vane machining.

[0004] In the past, the machining of the outer circle, inner hole and end surface of the upper and lower edge plates of the vane was performed using the six points of the blank as the reference. The first process of grinding the exhaust edge reference surface of the upper and lower edge plates was completed, and then the inlet edge upper and lower edge plate surface and the vane basin back surface were machined by positioning with the reference surface. Finally, a low-melting-point alloy was poured after a plurality of vane was spliced into a disc by a turning clamp, and the inner and outer circles of the upper and lower edge plates were turned. Such six processes are composed of six processes. This process method needs six sets of tooling, each set of tooling clamps the part, and the operation is complicated, especially the first process and the last turning process, which needs to pour low-melting-point alloy in the part. Pouring low-melting-point alloy has the following disadvantages: the excess material is easily retained in the vane cavity, and the excess material is difficult to clean; there is thermal expansion and cold contraction when pouring low-melting-point alloy, and the size of the part exhaust edge end surface machining will have deviation, so the vane needs to be repeatedly clamped and machined, the machining efficiency is low, and the machining quality is difficult to guarantee; the turning process needs parts that can be spliced into a disc to be machined, and if the number of parts is insufficient, the turning process cannot be completed.

[0005] It can be seen that the existing complex process machining method needs six machining and six sets of tooling to repeatedly clamp the vane, and has problems such as excess material in the cavity after pouring the part, large machining error, difficult to guarantee the size, and the turning process depends on the number of parts.

[0006] There are also six-point positioning schemes for stabilizing and clamping special-shaped guide vanes in the prior art, such as a vane inner and outer diameter measuring device and a measuring method disclosed in Chinese Patent Publication No. CN117419630A. However, the clamping device in the prior art is mainly used to complete the measurement of the guide vane in a static state, and it is difficult to ensure that the contact positions of the positioning blocks, positioning pins and the part do not displace and effectively overcome the stress in the grinding process, so it is difficult to meet the requirements of the guide vane machining link; and the clamping, pressing and positioning functions of the existing clamping device are designed separately, and a process ball needs to be set to assist in positioning, which not only wastes a lot of manpower and material resources in processing the fixture reference during tooling manufacturing and inspection, but also cannot guarantee the repeated positioning accuracy of the fixture.

[0007] It should be noted that the information disclosed in the above BACKGROUND section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0008] In view of at least one of the above technical problems, the present application provides a guide vane machining clamping device. In order to solve the problems of multiple process requirements, multiple toolings, internal excess material after machining, large machining error and difficult size guarantee for multi-union guide vane reference surface machining, a guide vane machining clamping device is designed to realize reasonable, stable and reliable six-point positioning, has an auxiliary supporting and pressing mechanism which is easy to operate and simple to manufacture, can quickly clamp and position the vane, and can guarantee the machining of the exhaust edge reference end face and the inner and outer arc reference face of the upper and lower edge plates of the guide vane part at one time.

[0009] The present application also provides a guide vane positioning method using the above guide vane machining clamping device.

[0010] According to one aspect of the present application, a guide vane machining clamping device is provided for clamping a guide vane of an aero-engine, comprising:

[0011] a base, a pressing mechanism, a vane basin edge plate supporting assembly and a bottom supporting assembly are arranged on the base, the bottom supporting assembly is used to support the bottom of the guide vane, the pressing mechanism is used to press and limit the top of the guide vane in cooperation with the bottom supporting assembly, and the vane basin edge plate supporting assembly is used to support the vane basin side of the guide vane to limit the horizontal movement of the guide vane;

[0012] a vertical positioning assembly, the vertical positioning assembly is installed on the base, and the vertical positioning assembly comprises a B4 positioning block and a B5 positioning block, the B4 positioning block and the B5 positioning block are used to support two positioning points on the inlet edge side profile of the guide vane to limit the vertical displacement of the guide vane;

[0013] A radial positioning assembly, the radial positioning assembly comprises an A1 positioning pin, an A2 positioning pin and an A3 positioning pin, the A1 positioning pin and the A2 positioning pin are used for supporting two positioning points on an inner flow channel surface of a lower edge plate of the guide vane and on a same side of a machining direction, and the A3 positioning pin is used for supporting a positioning point on a suction side of the guide vane;

[0014] A circumferential positioning assembly, the circumferential positioning assembly comprises a C6 positioning pin, the C6 positioning pin is arranged on the base, and the C6 positioning pin is used for supporting a positioning point on a back surface of the guide vane to limit a circumferential tilting movement of the guide vane.

[0015] In some embodiments of the present application, the A1 positioning pin and the A2 positioning pin are arranged on a pressing mechanism, the pressing mechanism is further used for driving the A1 positioning pin and the A2 positioning pin to rotate synchronously to move away from or close to the base, and in the process of moving away from the base, the A1 positioning pin and the A2 positioning pin are separated from the support of the guide vane, and in the process of closing to the guide vane, the A1 positioning pin and the A2 positioning pin abut against the guide vane to support the guide vane; and the A3 positioning pin is arranged on the B5 positioning block.

[0016] In some embodiments of the present application, the pressing mechanism comprises a turnover pressing assembly, the turnover pressing assembly comprises a first support, a second support and a turnover pressing plate, the first support and the second support are arranged on the base in a spaced manner, a first end of the turnover pressing plate is hinged to the first support, a second end of the turnover pressing plate is used for abutting against the second support, a connecting screw hole is arranged on the second support, the connecting screw hole is used for arranging a pressing bolt, and the second end of the turnover pressing plate is pressed and limited on the second support through the pressing bolt; and the A1 positioning pin and the A2 positioning pin are arranged on a side wall of the turnover pressing plate.

[0017] In some embodiments of the present application, a vane basin edge plate supporting assembly is arranged on the second support, the second support is arranged opposite to the C6 positioning pin, the vane basin edge plate supporting assembly comprises an adjusting piece, a mounting block and a limiting stopper, a threaded hole is arranged on a side wall of the second support, the adjusting piece is arranged through and threadedly connected with the threaded hole, the mounting block is arranged on a first end of the adjusting piece, and the limiting stopper is slidably arranged in a limiting hole prearranged on the mounting block; the adjusting piece is used for driving the mounting block and the limiting stopper to move, and then the limiting stopper abuts against and presses the upper edge plate and the lower edge plate at the vane basin of the guide vane.

[0018] In some embodiments of the present application, the pressing mechanism further comprises a plurality of pressing plate assemblies, the plurality of pressing plate assemblies are arranged on the outer side of the guide vane in a circumferential direction, the pressing plate assembly comprises an auxiliary pressing plate, a support and a limiting screw rod, the support is matched with a connecting screw hole pre-set on the base after penetrating through a connecting through hole pre-set in the middle of the auxiliary pressing plate, a first compression spring is sleeved on the support, the first compression spring is located between the bottom of the auxiliary pressing plate and the upper surface of the base, the first compression spring is used to provide an elastic force for pushing the auxiliary pressing plate away from the base, the limiting screw rod is connected with a screw hole pre-set on the base after penetrating through a through hole pre-set in the first end of the auxiliary pressing plate, and then the auxiliary pressing plate is pushed close to the base through the limiting screw rod so that the second end of the auxiliary pressing plate abuts against the side wall of the guide vane.

[0019] In some embodiments of the present application, the pressing mechanism further comprises a pressing assembly, the pressing assembly comprises a pressing piece and a supporting block, the supporting block is installed on the base, a supporting screw hole is opened on the supporting block, the pressing piece is arranged in the supporting screw hole and is threadedly connected with the supporting screw hole, and the pressing piece is used to abut against the edge plate of the guide vane and limit the two sides of the edge plate of the guide vane in cooperation with the A1 positioning pin, the A2 positioning pin and the A3 positioning pin.

[0020] In some embodiments of the present application, the bottom supporting assembly comprises a lever piece, a mounting seat, a supporting pin and a fastening bolt, the mounting seat is installed on the base, the middle part of the lever piece is hinged to the mounting seat, the supporting pin is arranged at the first end of the lever piece, an installation screw hole is opened at the second end of the lever piece, and the fastening bolt is matched with a limiting screw hole pre-set on the base after penetrating through the installation screw hole, so that the second end of the lever piece is pressed down, the first end of the lever piece is lifted up, and the bottom of the guide vane is supported through the supporting pin.

[0021] In some embodiments of the present application, a second compression spring is sleeved on the fastening bolt, the second compression spring is elastically pressed between the lever piece and the base, and the second compression spring is used to provide an elastic force for pushing the second end of the lever piece away from the base; a limiting through hole is opened at the first end of the lever piece, the head of the supporting pin penetrates through the limiting through hole and a mounting through hole pre-set on the base in sequence, the head of the supporting pin is provided with a limiting nut, the limiting nut is used to limit the sliding stroke of the supporting pin in the mounting through hole, and the tail of the supporting pin is provided with a supporting platform, the supporting platform is used to support the bottom of the guide vane.

[0022] In some embodiments of the present application, the guide vane machining clamping device further comprises a reference sheet, the reference sheet is arranged at the bottom of the base, and the reference sheet is used to cooperate with a reference head pre-set on a machining machine tool to realize the assembly and positioning of the guide vane machining clamping device.

[0023] According to another aspect of the present application, a guide vane positioning method is also provided, which adopts the guide vane machining clamping device, and the guide vane positioning method comprises the following steps:

[0024] S100: select six accurate points for casting of the guide vane blank stage as positioning points, set two different positioning points on the inner runner surface of the lower edge plate of the guide vane and on the same side of the processing direction as A1 point and A2 point, the positioning point on the inlet edge side as A3 point, two different positioning points on the inlet edge side blade profile as B4 point and B5 point, and one positioning point on the blade back profile as C6 point;

[0025] S200: place the guide vane on the base, support the bottom of the guide vane through the bottom supporting assembly, and press and position the top of the guide vane through the pressing mechanism in cooperation with the bottom supporting assembly;

[0026] S300: adjust the position of the guide vane so that the A1 point, A2 point, A3 point, B4 point, B5 point and C6 point of the guide vane correspond one by one with the A1 positioning pin, A2 positioning pin, A3 positioning pin, B4 positioning block, B5 positioning block and C6 positioning pin, and check the tightness with a plug gauge;

[0027] S400: support the upper edge plate and the lower edge plate of the guide vane on the blade basin edge plate supporting assembly, and cooperate with the C6 positioning pin to limit the horizontal movement of the guide vane;

[0028] S500: check again with the plug gauge whether the positioning points of the guide vane are loose and displaced, and make timely fine adjustment if there is loose displacement.

[0029] The present application has the following beneficial effects:

[0030] The guide vane machining clamping device of the present application realizes stable clamping and positioning of the guide vane through the pressing mechanism on the base, the blade basin edge plate supporting assembly and the bottom supporting assembly, wherein the bottom supporting assembly can support the bottom of the guide vane, and the setting of the bottom supporting assembly can expand the adaptability of the clamping device and adapt to the supporting needs of more different blades; the pressing mechanism cooperates with the bottom supporting assembly to realize the pressing and positioning of the guide vane, and finally the horizontal movement of the guide vane is limited through the blade basin edge plate supporting assembly, which can realize stable clamping and positioning of the guide vane.

[0031] Meanwhile, the A1 positioning pin and the A2 positioning pin of the radial positioning assembly support two positioning points on the inner flow channel surface of the lower edge plate of the guide vane and on the same side of the processing direction, and the A3 positioning pin supports a positioning point on the inlet edge side of the guide vane, so that the radial limiting and positioning of the guide vane are realized; the B4 positioning block and the B5 positioning block of the vertical positioning assembly support two positioning points on the air inlet edge side of the guide vane, so that the limiting and positioning of the vertical displacement of the guide vane are realized; and the C6 positioning pin supports a positioning point on the back type surface of the guide vane to limit the angular inclination movement of the guide vane and complete the positioning of the back type surface. The present application can realize reasonable, stable and reliable six-point positioning through a set of clamping device, is simple to manufacture, can quickly clamp and position the blade processing method, and can ensure that the exhaust edge reference end surface and the inner and outer arc reference surface of the upper and lower edge plates of the guide vane part are processed at one time.

[0032] The guide vane positioning method of the present application also has the beneficial effects described above, and further includes canceling the pouring of the low-melting-point alloy, so as to effectively avoid the appearance of excess material in the part cavity and solve the problem of unstable processing size of the part caused by thermal expansion and cold contraction of the poured low-melting-point alloy, while being simple to operate, convenient to adjust, beneficial to ensuring the processing quality and improving the efficiency of part processing.

[0033] Of course, implementing any product of the present application does not necessarily need to achieve all the advantages described above. In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0034] The drawings that form a part of this application provide further understanding of the present application, the illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0035] Figure 1 is a schematic diagram of the overall structure of the preferred embodiment of the present application;

[0036] Figure 2 is a schematic diagram of the positions of the A1 point, the A2 point and the A3 point of the guide vane of the preferred embodiment of the present application;

[0037] Figure 3 is a schematic diagram of the positions of the B4 point, the B5 point and the C6 point of the guide vane of the preferred embodiment of the present application;

[0038] Figure 4 is a schematic diagram of the radial positioning assembly of the preferred embodiment of the present application abutting against the guide vane;

[0039] Figure 5 is a schematic diagram of the clamping of the guide vane of the preferred embodiment of the present application;

[0040] Figure 6 is a position diagram of the reference sheet of the preferred embodiment of the present application;

[0041] Figure 7 is an installation diagram of the vertical positioning assembly of the preferred embodiment of the present application;

[0042] Figure 8 is an installation diagram of the turnover pressing plate of the preferred embodiment of the present application;

[0043] Figure 9 is a structure diagram of the vertical positioning assembly of the preferred embodiment of the present application;

[0044] Figure 10 is a structure diagram of the C6 positioning pin of the preferred embodiment of the present application;

[0045] Figure 11 is a structure diagram of the bottom supporting assembly of the preferred embodiment of the present application;

[0046] Figure 12 is an installation diagram of the lever of the preferred embodiment of the present application;

[0047] Figure 13 is an installation diagram of the limiting stopper of the preferred embodiment of the present application;

[0048] Figure 14 is a structure diagram of the pressing mechanism of the preferred embodiment of the present application;

[0049] Legend: 100, base; 200, guide vane; 300, A1 positioning pin; 400, A2 positioning pin; 500, A3 positioning pin; 600, B4 positioning block; 700, B5 positioning block; 800, C6 positioning pin; 1, pressing mechanism; 11, turnover pressing assembly; 111, first support; 112, second support; 113, turnover pressing plate; 114, limiting piece; 115, pressing piece; 12, pressing plate assembly; 121, auxiliary pressing plate; 122, supporting piece; 123, limiting screw; 124, first compression spring; 13, jacking assembly; 131, jacking piece; 132, supporting block; 2, vane basin edge plate supporting assembly; 21, adjusting piece; 22, mounting block; 23, limiting stopper; 3, bottom supporting assembly; 31, lever; 32, mounting seat; 33, supporting pin; 34, fastening bolt; 35, second compression spring; 4, reference sheet. DETAILED DESCRIPTION

[0050] The embodiments of the present application are described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the following.

[0051] Figure 1is a schematic diagram of the overall structure of the preferred embodiment of the present application; Figure 2 is a schematic diagram of the positions of points A1, A2 and A3 of the guide vane of the preferred embodiment of the present application; Figure 3 is a schematic diagram of the positions of points B4, B5 and C6 of the guide vane of the preferred embodiment of the present application; Figure 4 is a schematic diagram of the abutment of the radial positioning assembly with the guide vane of the preferred embodiment of the present application; Figure 5 is a schematic diagram of the clamping of the guide vane of the preferred embodiment of the present application; Figure 6 is a schematic diagram of the position of the reference sheet of the preferred embodiment of the present application; Figure 7 is a schematic diagram of the installation of the vertical positioning assembly of the preferred embodiment of the present application; Figure 8 is a schematic diagram of the installation of the turnover pressing plate of the preferred embodiment of the present application; Figure 9 is a schematic diagram of the structure of the vertical positioning assembly of the preferred embodiment of the present application;

[0052] Figure 10 is a schematic diagram of the structure of the C6 positioning pin of the preferred embodiment of the present application; Figure 11 is a schematic diagram of the structure of the bottom support assembly of the preferred embodiment of the present application; Figure 12 is a schematic diagram of the installation of the lever of the preferred embodiment of the present application; Figure 13 is a schematic diagram of the installation of the limiting stop of the preferred embodiment of the present application; Figure 14 is a schematic diagram of the structure of the pressing mechanism of the preferred embodiment of the present application.

[0053] A guide vane machining clamping device for clamping a guide vane 200 of an aero-engine, the guide vane machining clamping device comprising:

[0054] a base 100, the base 100 being provided with a pressing mechanism 1, a blade basin rim plate support assembly 2 and a bottom support assembly 3, the bottom support assembly 3 being used for supporting the bottom of the guide vane 200, the pressing mechanism 1 being used for pressing and limiting the top of the guide vane 200 in cooperation with the bottom support assembly 3, and the blade basin rim plate support assembly 2 being used for supporting the blade basin side of the guide vane 200 to limit the horizontal movement of the guide vane 200;

[0055] a vertical positioning assembly, the vertical positioning assembly being installed on the base 100, the vertical positioning assembly comprising a B4 positioning block 600 and a B5 positioning block 700, the B4 positioning block 600 and the B5 positioning block 700 being used for supporting two positioning points on the inlet edge side profile of the guide vane 200 to limit the vertical displacement of the guide vane 200;

[0056] A1 positioning pin 300 and A2 positioning pin 400 are used to support two positioning points on the lower edge plate inner flow channel surface of the guide vane 200 and on the same side of the machining direction, and A3 positioning pin 500 is used to support the positioning point on the inlet edge side of the guide vane 200;

[0057] The angular positioning assembly includes a C6 positioning pin 800, which is installed on the base 100 and is used to support the positioning point on the back surface of the guide vane 200 to limit the angular inclination movement of the guide vane 200.

[0058] Here, the "C6 positioning pin 800" refers to the structure that is in close contact with the positioning point on the back surface of the guide vane 200. In some embodiments, the C6 positioning pin 800 is a cylindrical pin structure. Preferably, the C6 positioning pin 800 is a ball head type pin structure. It should be noted that during the machining process, it was found that there was a gap between the theoretical position of the cylindrical positioning pin and the actual required position of the vane, resulting in unstable size of the vane machining. The analysis is that there is an error in the vane type, and the positioning point given by the design drawing and the actual contact point of the cylindrical pin positioning are not in the same position. In addition, the cylindrical positioning pin requires that the entire rod part has a cylindricality of 0.005 mm and a perpendicularity of 0.005 mm with the base plate, which is difficult to manufacture. Therefore, the ball head type pin structure can avoid the interference between the C6 positioning pin 800 and the vane type of the guide vane 200 during clamping, the ball head pin is simple to manufacture, and the positioning accuracy can be effectively guaranteed.

[0059] The guide vane machining and clamping device of the present application realizes stable clamping and positioning of the guide vane 200 through the pressing mechanism 1 on the base 100, the vane basin edge plate supporting assembly 2 and the bottom supporting assembly 3. The bottom supporting assembly 3 can support the bottom of the guide vane 200, and the setting of the bottom supporting assembly 3 can expand the adaptability of the clamping device and adapt to the supporting needs of more different vanes. The pressing mechanism 1 cooperates with the bottom supporting assembly 3 to realize the pressing and limiting of the guide vane 200, and finally the horizontal movement of the guide vane 200 is limited through the vane basin edge plate supporting assembly 2, so that the stable clamping and limiting of the guide vane 200 can be realized.

[0060] Meanwhile, the A1 positioning pin 300 and the A2 positioning pin 400 of the radial positioning assembly support two positioning points on the inner flow channel surface of the lower edge plate of the guide vane 200 and on the same side of the machining direction, and the A3 positioning pin 500 supports a positioning point on the intake edge side of the guide vane 200, so as to realize the radial limiting and positioning of the guide vane 200; the B4 positioning block 600 and the B5 positioning block 700 of the vertical positioning assembly support two positioning points on the air intake edge side of the guide vane 200, so as to realize the limiting and positioning of the vertical displacement of the guide vane 200; and the C6 positioning pin 800 supports a positioning point on the back type surface of the guide vane 200, so as to limit the angular tilting movement of the guide vane 200 and complete the positioning of the back type surface. The present application can realize reasonable, stable and reliable six-point positioning through a set of clamping device, is simple to manufacture, can quickly clamp and position the vane, and can ensure that the exhaust edge reference end surface and the inner and outer circular arc reference surface of the upper and lower edge plates of the guide vane 200 are machined at one time.

[0061] Preferably, as shown in Figure 1 、 Figure 7 and Figure 8 , the A1 positioning pin 300 and the A2 positioning pin 400 are arranged on the pressing mechanism 1, the pressing mechanism 1 is also used to drive the A1 positioning pin 300 and the A2 positioning pin 400 to rotate synchronously to move away from or close to the base 100, and in the process of moving away from the base 100, the A1 positioning pin 300 and the A2 positioning pin 400 are separated from the support of the guide vane 200, and in the process of closing, the A1 positioning pin 300 and the A2 positioning pin 400 abut against the guide vane 200 to support; and the A3 positioning pin 500 is arranged on the B5 positioning block 700.

[0062] It can be understood that the pressing mechanism 1 not only plays a role in cooperating with the bottom supporting assembly 3 to support and press the guide vane 200, but also drives the A1 positioning pin 300 and the A2 positioning pin 400 to complete the radial positioning of the guide vane 200 when being pressed, which not only simplifies the structure, but also eliminates the need for additional installation structure to realize the installation of the A1 positioning pin 300 and the A2 positioning pin 400, and at the same time, improves the clamping and positioning efficiency of the guide vane 200. Meanwhile, the B5 positioning block 700 is used to provide the installation of the A3 positioning pin 500, which not only simplifies the structure, but also realizes the synchronous positioning of the B5 point and the A3 point, which is beneficial to improving the positioning efficiency and positioning accuracy of the guide vane 200 as a whole, and realizing faster positioning in cooperation with other positioning points.

[0063] Preferably, as shown in Figure 1 、 5As shown in FIGS. 14, the pressing mechanism 1 comprises a turnover pressing assembly 11, the turnover pressing assembly 11 comprises a first support 111, a second support 112 and a turnover pressing plate 113, the first support 111 and the second support 112 are arranged on the base 100 in a spaced manner, the first end of the turnover pressing plate 113 is hinged to the first support 111, the second end of the turnover pressing plate 113 is used to abut against the second support 112, a connecting screw hole is formed on the second support 112, the connecting screw hole is used to arrange a pressing bolt and press and limit the second end of the turnover pressing plate 113 on the second support 112 through the pressing bolt; the A1 positioning pin 300 and the A2 positioning pin 400 are arranged on the side wall of the turnover pressing plate 113.

[0064] It can be understood that the turnover pressing plate 113 can rotate around the hinge point of the first support 111, the second end of the turnover pressing plate 113 is locked on the second support 112 through the pressing bolt, that is, the pressing effect of the turnover pressing plate 113 on the guide vane 200 can be realized. At the same time, since the A1 positioning pin 300 and the A2 positioning pin 400 are arranged on the side wall of the turnover pressing plate 113, the A1 positioning pin 300 and the A2 positioning pin 400 can be driven by the turnover pressing plate 113 to realize the radial positioning of the guide vane 200, so that one action can realize multiple functions, which can effectively improve the clamping and positioning efficiency of the guide vane 200 as a whole.

[0065] Preferably, the turnover pressing plate 113 is designed in a circular arc shape according to the shape of the part, so that the turnover pressing plate 113 can be more fitted to the blade profile of the guide vane 200.

[0066] Preferably, the second support 112 is provided with a limiting piece 114, the limiting piece 114 is provided with two, a limiting groove is formed between the two limiting pieces 114, and the limiting groove is used to limit the second end of the turnover pressing plate 113. The limiting piece 114 can improve the cooperation precision of the turnover pressing plate 113 and the second support 112, thereby improving the pressing precision and stability of the turnover pressing plate 113 on the guide vane 200, and ensuring the positioning accuracy of the A1 positioning pin 300 and the A2 positioning pin 400.

[0067] Optionally, the limiting piece 114 is a cylindrical pin or a screw rod, which can be conveniently connected and assembled with the second support 112 by using a standard part, and is convenient to replace and maintain.

[0068] Preferably, a pressing block is placed between the bottom of the turnover pressing plate 113 and the exhaust edge of the guide vane 200, a pressing screw hole is formed on the side wall of the side of the turnover pressing plate 113 away from the base 100, the pressing screw hole is used to set a pressing piece 115, and the pressing block is tightly pressed against the exhaust edge of the guide vane 200 through the pressing piece 115. The pressing piece 115 includes a pressing plate bolt, which is threadedly connected with the pressing screw hole. When the turnover pressing plate 113 is rotated to approach the guide vane 200, the tightness of the pressing block and the guide vane 200 can be conveniently adjusted through the pressing block, and the position of the turnover pressing plate 113 or the guide vane 200 can be conveniently adjusted, so as to realize more accurate pressing limiting and positioning. Preferably, three pressing plate bolts are arranged to correspond to three blades on the guide vane 200, and the pressing plate bolts are tightened in sequence to apply force to the pressing block to ensure that the pressing block can press the guide vane 200 and ensure the stability of the guide vane 200 during processing.

[0069] Preferably, as shown in FIGS. 1-3, Figure 1 、 13 The leaf basin edge plate supporting assembly 2 is arranged on the second support 112, the second support 112 is arranged opposite to the C6 positioning pin 800, the leaf basin edge plate supporting assembly 2 includes an adjusting piece 21, a mounting block 22 and a limiting stop piece 23, a threaded hole is formed on the side wall of the second support 112, the adjusting piece 21 is arranged through the threaded hole and is threadedly connected with the threaded hole, the mounting block 22 is arranged at a first end of the adjusting piece 21, and the limiting stop piece 23 is slidingly arranged in a limiting hole prearranged on the mounting block 22. The adjusting piece 21 is used to drive the mounting block 22 and the limiting stop piece 23 to move, and then the limiting stop piece 23 is used to abut and tightly press the upper edge plate and the lower edge plate at the leaf basin of the guide vane 200.

[0070] It can be understood that by adjusting the axial movement of the adjusting piece 21 along the threaded hole, the mounting block 22 and the limiting stop piece 23 can be driven to move away from or approach the guide vane 200, so that when the guide vane 200 is approached, the upper edge plate and the lower edge plate at the leaf basin are tightly pressed by the limiting stop piece 23, and then the guide vane 200 is limited in the horizontal direction by cooperating with the C6 positioning pin 800, so as to avoid the guide vane 200 from being inclined during processing, and effectively ensure the processing quality.

[0071] It should be noted that the guide vane 200 will also be subjected to horizontal force in the grinding process, and the back side of the vane is blocked by the C6 positioning pin 800, if no auxiliary support is provided on the vane basin side, the vane will inevitably tilt during the machining process, so the vane basin rim plate supporting assembly 2 is provided here to play a limiting supporting role. Since the side supporting surface of the upper and lower rim plates of the guide vane 200 at this time is a rough blank surface, the auxiliary support on the guide vane 200 can only be realized in the form of line contact. Considering that the main function of the auxiliary support here is to eliminate the horizontal force on the vane to prevent tilting, a limiting stopper 23 is provided through the mounting block 22, and the upper and lower rim plates at the vane basin of the guide vane 200 are clamped by the limiting stopper 23. Alternatively, the limiting stopper 23 is a cylindrical pin, which not only has low manufacturing cost, but also facilitates the disassembly, maintenance and replacement of the limiting stopper 23.

[0072] Preferably, the adjusting member 21 is a butterfly bolt, which can be manually tightened by the butterfly handle at the tail of the adjusting member 21, so as to conveniently adjust the position of the adjusting member 21, thereby driving the mounting block 22 and the limiting stopper 23 to move axially along the threaded hole, realizing the abutment of the limiting stopper 23 and the guide vane 200, and ensuring the convenience of adjustment.

[0073] Preferably, please refer to Figure 1 、 14 The pressing mechanism 1 further comprises a plurality of pressing plate assemblies 12, which are arranged on the outer side of the guide vane 200 along the circumference of the guide vane 200, the pressing plate assembly 12 comprises an auxiliary pressing plate 121, a supporting member 122 and a limiting screw 123, the supporting member 122 passes through the connecting through hole in the middle of the auxiliary pressing plate 121 and is matched with the connecting screw hole on the bottom 100, the first compression spring 124 is sleeved on the supporting member 122, and the first compression spring 124 is located between the bottom of the auxiliary pressing plate 121 and the upper surface of the bottom 100, the first compression spring 124 is used to provide an elastic force for pushing the auxiliary pressing plate 121 away from the bottom 100, and the limiting screw 123 is used to pass through the through hole in the first end of the auxiliary pressing plate 121 and is connected with the screw hole on the bottom 100, so as to push the auxiliary pressing plate 121 close to the bottom 100 through the limiting screw 123, so that the second end of the auxiliary pressing plate 121 abuts against and presses the side wall of the guide vane 200.

[0074] It can be understood that, in order to ensure the stress of the guide vane 200 during the machining process, the clamping of the guide vane 200 is assisted by arranging the pressing plate assembly 12 along the circumference of the guide vane 200 to ensure the clamping stability of the guide vane 200. Preferably, three pressing plate assemblies 12 are arranged to press the upper and lower edge plates of the inlet edge of the guide vane 200, and the auxiliary pressing plate 121 can also cooperate with the bottom supporting assembly 3 to strengthen the fixing of the guide vane 200. The pressing points of the auxiliary pressing plate 121 can be arranged at the center of the adjacent bottom supporting assembly 3, which is more conducive to the stability of the pressing plate after pressing the vane.

[0075] Preferably, as shown in Figure 1 、 14 The pressing mechanism 1 further comprises a jacking assembly 13, and the jacking assembly 13 comprises a jacking piece 131 and a supporting block 132. The supporting block 132 is arranged on the base 100, and a supporting screw hole is formed in the supporting block 132. The jacking piece 131 is arranged in the supporting screw hole and is threadedly connected with the supporting screw hole. The jacking piece 131 is used for abutting against the edge plate of the guide vane 200 and limiting the two sides of the edge plate of the guide vane 200 in cooperation with the A1 positioning pin 300, the A2 positioning pin 400 and the A3 positioning pin 500.

[0076] It can be understood that, by adjusting the position of the jacking piece 131 in the supporting screw hole, the jacking piece 131 can be used to press the edge plate of the guide vane 200. Specifically, the inner side of the lower edge plate of the guide vane 200 is pressed, and the two sides of the lower edge plate of the guide vane 200 are strengthened and limited in cooperation with the A1 positioning pin 300, the A2 positioning pin 400 and the A3 positioning pin 500, which can greatly improve the clamping stability of the guide vane 200.

[0077] It should be noted that the jacking piece 131 of the jacking assembly 13 arranged on the inner side of the lower edge plate of the guide vane 200 can be easily disassembled from the supporting screw hole of the supporting block 132. The jacking piece 131 is used to press the guide vane 200 when machining the end face and the arc of the upper edge plate. When machining the arc and the end face of the lower edge plate, the jacking assembly 13 is disassembled to avoid the grinding wheel. The jacking piece 131 comprises a screw rod, and a spherical end head is arranged at the top end of the screw rod. The position of the jacking piece 131 for pressing the guide vane 200 must be in the plane formed by the three points of the main positioning reference A1 point, A2 point and A3 point, preferably near the center of gravity, to avoid tipping the guide vane 200 part, and also needs to avoid the small holes and protruding parts of the lower edge plate part, to ensure the stability of the pressing position and reduce the damage to the guide vane 200.

[0078] In addition, it should be noted that the supporting block 132 needs to be removed when machining the inner hole of the lower edge plate of the guide vane. Therefore, a directional groove is arranged on the base 100 to avoid the grinding wheel and prevent interference during machining.

[0079] Preferably, please refer to Figure 1 and Figure 11 As shown in the figure, the bottom supporting assembly 3 comprises a lever 31, a mounting seat 32, a supporting pin 33 and a fastening bolt 34, the mounting seat 32 is installed on the base 100, the middle part of the lever 31 is hinged to the mounting seat 32, the supporting pin 33 is arranged at the first end of the lever 31, the second end of the lever 31 is provided with a mounting screw hole, and the fastening bolt 34 is used to pass through the mounting screw hole and cooperate with the pre-set limiting screw hole on the base 100, so as to press down the second end of the lever 31 and lift the first end of the lever 31, and then support the bottom of the guide vane 200 through the supporting pin 33.

[0080] It can be understood that the bottom of the guide vane 200 can be supported during clamping by pressing down the second end of the lever 31 and lifting the first end of the lever 31 through the fastening bolt 34 and the supporting pin 33. The fastening bolt 34 can be conveniently tightened or disassembled manually, which is beneficial to improve the clamping efficiency.

[0081] It should be noted that the lever 31 is hinged and installed by being fixed to the mounting seat 32 through an axle pin. The installation of the lever 31 can realize lever-type auxiliary support, which can be operated by one hand, is labor-saving, convenient to operate, simple in structure and not difficult to manufacture. Compared with the screw-type adjustable supporting device, the lever-type auxiliary support has the advantage of being convenient to fine-tune. The screw-type adjustable supporting device is a mechanism for adjusting and supporting by locking a hexagonal thin nut. For the vane, the distance of the support rising can reach tens of silk or even several millimeters for each tightening of the thread. The auxiliary support of the vane needs to be adjusted by a small amount, so it is generally suitable for occasions with a large amount of adjustment, and is not suitable for supporting the guide vane 200. In addition, compared with the spring-type auxiliary supporting device, the lever-type auxiliary support also has the advantages of simple manufacturing and convenient operation. The spring-type auxiliary supporting device relies on the spring force to push the supporting pin up and down. After the guide vane 200 part is installed, the inner groove surface of the supporting pin is tightened with a screw, and the lower end of the spring is limited by a screw plug to prevent the spring from falling out. The spring-type supporting mechanism has a large manufacturing difficulty for each component, has high requirements for the spring, occupies a large space position of the clamp, and the supporting pin needs to be dustproof. If dust enters, the supporting pin is difficult to move up and down. The lever-type supporting assembly adopted by the present application has the outstanding characteristics, which is more suitable for the supporting requirements of the guide vane 200.

[0082] Preferably, please refer to Figure 11 and Figure 12As shown, the fastening bolt 34 is sleeved with a second compression spring 35, which is pressed between the lever 31 and the base 100, and is used to provide an elastic force to push the second end of the lever 31 away from the base 100; the first end of the lever 31 is provided with a limiting through hole, the head of the supporting pin 33 penetrates the limiting through hole and the pre-set mounting through hole of the base 100 in sequence, and the head of the supporting pin 33 is provided with a limiting nut, which is used to limit the sliding stroke of the supporting pin 33 in the mounting through hole; the tail of the supporting pin 33 is provided with a supporting platform, which is used to support the bottom of the guide vane 200.

[0083] It can be understood that the supporting pin 33 has a sliding allowance in the limiting through hole, and the lever 31 can drive the supporting pin 33 to lift or drop, so as to be adjusted to adapt to the supporting requirements of the guide vane 200. The second compression spring 35 not only plays a buffering role in the movement of the lever 31, but also protects the guide vane 200 and reduces the damage caused by the direct strong impact of the supporting pin 33 on the guide vane 200.

[0084] Preferably, referring to Figure 6 As shown, the guide vane machining clamping device is also provided with a reference piece 4, which is arranged at the bottom of the base 100 and is used to cooperate with the reference head pre-set on the machining machine tool to realize the assembly and positioning of the guide vane machining clamping device.

[0085] It can be understood that the fixed reference piece 4 plays a role in positioning the whole clamping device, and through the cooperation of the reference piece 4 and the reference head on the machining machine tool, the clamping device can be repeatedly and accurately positioned, the long-time calibration steps required for assembling the clamping device each time can be reduced, and the overall machining efficiency can be improved.

[0086] It should be noted that the conventional clamping device needs to be provided with a process ball on the clamp, and the process ball is used to determine the positional relationship between the clamp and the machine tool by aligning the clamp reference. At the same time, the process ball is also used to determine that each positioning member is in a fixed position when the clamp is manufactured, and a lot of manpower and material resources are wasted in processing the clamp reference during tool manufacturing and inspection. The reference piece 4 is designed at the bottom of the base 100 without interfering with the assembly of the pressing mechanism 1 and the like, and is convenient for cooperation with the reference head on the machining machine tool. Preferably, the reference piece 4 is a quenched precision casting with four or eight fixed screw holes, and corresponding screw holes are arranged at the bottom of the base 100 for connecting the reference piece 4. After the whole clamping device is manufactured, the reference piece 4 is fixed to the bottom of the base 100 by screws, so that the clamping device can be conveniently assembled on the machining machine tool. The reference piece 4 and the reference head can establish a unified reference system on the machine tool, so that each clamping device can always maintain the accuracy of repeated positioning on the machining machine tool no matter how many times it is replaced.

[0087] In addition, the application also provides a guide vane positioning method which adopts the guide vane machining clamping device, and the guide vane positioning method comprises the following steps:

[0088] S100: six accurate points for casting the guide vane blank 200 are selected as positioning points, two different positioning points on the same side of the lower edge plate inner runner surface and the machining direction of the guide vane 200 are set as A1 point and A2 point, a positioning point on the air inlet edge side is set as A3 point, two different positioning points on the air inlet edge side blade profile are set as B4 point and B5 point, and a positioning point on the blade back profile is set as C6 point;

[0089] S200: the guide vane 200 is placed on the base 100, the bottom of the guide vane 200 is supported by the bottom supporting assembly 3, and the top of the guide vane 200 is tightly positioned by the pressing mechanism 1 in cooperation with the bottom supporting assembly 3;

[0090] S300: the position of the guide vane 200 is adjusted so that the A1 point, the A2 point, the A3 point, the B4 point, the B5 point and the C6 point of the guide vane 200 correspondingly abut against the A1 positioning pin 300, the A2 positioning pin 400, the A3 positioning pin 500, the B4 positioning block 600, the B5 positioning block 700 and the C6 positioning pin 800, and the abutting degree is checked by the feeler gauge;

[0091] S400: the upper edge plate and the lower edge plate of the guide vane 200 on the blade basin side are supported by the blade basin edge plate supporting assembly 2, and the horizontal movement of the guide vane 200 is limited in cooperation with the C6 positioning pin 800;

[0092] S500: whether the positioning points of the guide vane 200 are loosened and displaced is checked again by the feeler gauge, and if there is loosening and displacement, the guide vane is timely adjusted.

[0093] In the specific implementation process, in order to ensure that each clamp is completely abutted and tightly pressed against the guide vane part, the embodiment provides a targeted guide vane positioning method:

[0094] (1) after the guide vane is placed in the clamp, the pressing bolt between the turnover pressing plate 113 and the second support 112 is fastened to ensure that the turnover pressing plate 113 is not moved, the position of the guide vane is adjusted, the guide vane is contacted with the six positioning points, and whether each positioning point is abutted with the guide vane is checked by the feeler gauge;

[0095] (2) the jacking piece 131 on the inner side supporting block 132 of the lower edge plate of the guide vane is manually tightened to ensure that the spherical end head of the jacking piece 131 tightly presses the inner edge plate of the guide vane;

[0096] ⑶ Tighten the middle pressing piece 115 of the plurality of pressing pieces 115 on the upper end of the turnover pressing plate 113, and check whether each positioning point and the guide vane are well fitted by using the feeler gauge. Then, adjust the other pressing pieces 115 of the turnover pressing plate 113 to ensure that the guide vane exhaust edge can be pressed by the pressing block;

[0097] ⑷ Tighten the adjusting piece 21 on the second support 112 to ensure that the limiting piece 23 on the guide vane blade side can block the guide vane blade side edge plate;

[0098] ⑸ Adjust the fastening bolt 34 of the bottom support assembly 3 respectively to ensure that the support pin 33 abuts against the upper and lower edge plates of the guide vane;

[0099] ⑹ Press the auxiliary pressing plate 121 on the upper and lower edge plates of the guide vane respectively;

[0100] ⑺ Check whether each positioning point and the part are well fitted by using the feeler gauge again. The guide vane positioning method of the present application adopts the guide vane machining clamping device, can process qualified parts meeting the process size and position requirements at one time, and further includes canceling the pouring of low-melting-point alloy, so as to effectively avoid the appearance of excess material in the part cavity and solve the problem of unstable part machining size caused by thermal expansion and cold contraction of the poured low-melting-point alloy. In addition, the operation is simple, the adjustment is convenient, and the machining quality is guaranteed, and the part machining efficiency is improved.

[0101] It should be noted that in this text, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0102] The principles and implementation modes of the present application are described by using specific examples in this text, and the above example description is only used to help understand the method and core idea of the present application. The above description is only the preferred implementation mode of the present application. It should be noted that due to the limitation of language expression, there are infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, decorations or changes can be made without departing from the principles of the present application, and the above technical features can be combined in an appropriate manner. The improvements, decorations, changes or combinations, or the direct application of the inventive concept and technical scheme to other occasions without improvement shall be regarded as the protection of the present application.

Claims

1. A guide vane machining clamp device for clamping a guide vane (200) of an aeroengine, characterized in that, The guiding vane machining clamping device comprises: a base (100), the base (100) is provided with a pressing mechanism (1), a vane basin edge plate supporting assembly (2) and a bottom supporting assembly (3), the bottom supporting assembly (3) is used for supporting the bottom of the guiding vane (200), the pressing mechanism (1) is used for cooperating with the bottom supporting assembly (3) to press and limit the top of the guiding vane (200), and the vane basin edge plate supporting assembly (2) is used for supporting the vane basin side of the guiding vane (200) to limit the horizontal movement of the guiding vane (200); a vertical positioning assembly, the vertical positioning assembly is installed on the base (100), and the vertical positioning assembly comprises B4 positioning blocks (600) and B5 positioning blocks (700), the B4 positioning blocks (600) and the B5 positioning blocks (700) are used for supporting two positioning points on the inlet edge side profile of the guiding vane (200) to limit the vertical displacement of the guiding vane (200); a radial positioning assembly, the radial positioning assembly comprises A1 positioning pins (300), A2 positioning pins (400) and A3 positioning pins (500), the A1 positioning pins (300) and the A2 positioning pins (400) are used for supporting two positioning points on the same side of the lower edge plate inner flow channel surface of the guiding vane (200) in the machining direction, and the A3 positioning pins (500) are used for supporting the positioning point on the inlet edge side of the guiding vane (200); an angular positioning assembly, the angular positioning assembly comprises C6 positioning pins (800), the C6 positioning pins (800) are installed on the base (100), and the C6 positioning pins (800) are used for supporting the positioning point on the profile surface of the guiding vane (200) to limit the angular tilting movement of the guiding vane (200).

2. A guide vane machining fixture according to claim 1, wherein The A1 positioning pins (300) and the A2 positioning pins (400) are arranged on the pressing mechanism (1), the pressing mechanism (1) is also used for driving the A1 positioning pins (300) and the A2 positioning pins (400) to rotate synchronously to move away from or close to the base (100), and in the process of moving away from the base (100), the A1 positioning pins (300) and the A2 positioning pins (400) are separated from the supporting of the guiding vane (200), and in the process of closing to the base (100), the A1 positioning pins (300) and the A2 positioning pins (400) abut against the guiding vane (200) to support; the A3 positioning pins (500) are arranged on the B5 positioning blocks (700).

3. A guide vane machining fixture according to claim 2, wherein The pressing mechanism (1) comprises a turnover pressing assembly (11), the turnover pressing assembly (11) comprises first supports (111), second supports (112) and a turnover pressing plate (113), the first supports (111) and the second supports (112) are arranged on the base (100) in a spaced manner, a first end of the turnover pressing plate (113) is hinged to the first support (111), a second end of the turnover pressing plate (113) is used for abutting against the second support (112), a connecting threaded hole is formed in the second support (112), the connecting threaded hole is used for arranging a pressing bolt, and the second end of the turnover pressing plate (113) is pressed and limited on the second support (112) through the pressing bolt; the A1 positioning pins (300) and the A2 positioning pins (400) are arranged on the side wall of the turnover pressing plate (113).

4. A guide vane machining fixture according to claim 3, wherein The leaf basin edge plate supporting assembly (2) is arranged on the second support (112), the second support (112) is arranged opposite to the C6 positioning pin (800), the leaf basin edge plate supporting assembly (2) comprises an adjusting piece (21), a mounting block (22) and a limiting stop piece (23), a threaded hole is formed in the side wall of the second support (112), the adjusting piece (21) is arranged to pass through the threaded hole and is threadedly connected with the threaded hole, the mounting block (22) is arranged at the first end of the adjusting piece (21), the limiting stop piece (23) is slidingly arranged in the limiting hole of the mounting block (22), the adjusting piece (21) is used for driving the mounting block (22) and the limiting stop piece (23) to move, and then the limiting stop piece (23) is used for abutting and tightly pressing the upper edge plate and the lower edge plate at the leaf basin of the guide vane (200).

5. The guide vane machining fixture of claim 1, wherein The pressing mechanism (1) further comprises a plurality of pressing plate assemblies (12), the plurality of pressing plate assemblies (12) are arranged on the outer side of the guide vane (200) in a circumferential direction, the pressing plate assembly (12) comprises an auxiliary pressing plate (121), a supporting piece (122) and a limiting screw rod (123), the supporting piece (122) passes through the connecting through hole in the middle of the auxiliary pressing plate (121) and is matched with the connecting screw hole in the bottom seat (100), the first compression spring (124) is sleeved on the supporting piece (122), the first compression spring (124) is elastically pressed between the auxiliary pressing plate (121) and the bottom seat (100), the first compression spring (124) is used for providing an elastic force for pushing the auxiliary pressing plate (121) away from the bottom seat (100), the limiting screw rod (123) is used for penetrating through the through hole in the first end of the auxiliary pressing plate (121) and is connected with the screw hole in the bottom seat (100), and then the auxiliary pressing plate (121) is pushed to be close to the bottom seat (100) through the limiting screw rod (123) so that the second end of the auxiliary pressing plate (121) abuts against and presses the side wall of the guide vane (200).

6. A guide vane machining fixture device according to claim 1, wherein The pressing mechanism (1) further comprises a pressing assembly (13), the pressing assembly (13) comprises a pressing piece (131) and a supporting block (132), the supporting block (132) is arranged on the bottom seat (100), the supporting screw hole is formed in the supporting block (132), the pressing piece (131) is arranged in the supporting screw hole and is threadedly connected with the supporting screw hole, and the pressing piece (131) is used for abutting against the edge plate of the guide vane (200) and limiting the two sides of the edge plate of the guide vane (200) in cooperation with the A1 positioning pin (300), the A2 positioning pin (400) and the A3 positioning pin (500).

7. A guide vane machining fixture device according to claim 1, wherein The bottom supporting assembly (3) comprises a lever member (31), a mounting seat (32), a supporting pin (33) and a fastening bolt (34), the mounting seat (32) is arranged on the base (100), the middle part of the lever member (31) is hinged to the mounting seat (32), the supporting pin (33) is arranged at the first end of the lever member (31), the second end of the lever member (31) is provided with a mounting screw hole, the fastening bolt (34) is used for penetrating through the mounting screw hole and cooperating with a limiting screw hole prearranged on the base (100), so that the second end of the lever member (31) is pressed downward, the first end of the lever member (31) is lifted and the bottom of the guide vane (200) is supported through the supporting pin (33).

8. A guide vane machining fixture device according to claim 7, wherein The second compression spring (35) is sleeved on the fastening bolt (34) and is elastically pressed between the lever member (31) and the base (100), and the second compression spring (35) is used for providing an elastic force for pushing the second end of the lever member (31) away from the base (100); The first end of the lever member (31) is provided with a limiting through hole, the head of the supporting pin (33) penetrates through the limiting through hole and a mounting through hole prearranged on the base (100) in sequence, the head of the supporting pin (33) is provided with a limiting nut, the limiting nut is used for limiting the sliding stroke of the supporting pin (33) in the mounting through hole, and the tail of the supporting pin (33) is provided with a supporting platform, and the supporting platform is used for supporting the bottom of the guide vane (200).

9. A guide vane machining fixture device according to claim 1, wherein The guide vane machining clamping device further comprises a reference sheet (4), the reference sheet (4) is arranged at the bottom of the base (100), and the reference sheet (4) is used for cooperating with a reference head prearranged on a machining machine tool to realize assembly and positioning of the guide vane machining clamping device.

10. A method of positioning a vane, characterized by, The guide vane positioning method comprises the following steps: S100: six accurate points for casting of the guide vane (200) blank stage are selected as positioning points, two different positioning points on the same side of the lower edge plate inner runner surface and the machining direction of the guide vane (200) are set as A1 point and A2 point, a positioning point on the inlet edge side is set as A3 point, two different positioning points on the inlet edge side blade profile are set as B4 point and B5 point, and a positioning point on the blade back profile is set as C6 point; S200: the guide vane (200) is placed on the base (100), the bottom of the guide vane (200) is supported through the bottom supporting assembly (3), and the top of the guide vane (200) is clamped and limited through the clamping mechanism (1) cooperating with the bottom supporting assembly (3); S300: the position of the guide vane (200) is adjusted to make the A1 point, the A2 point, the A3 point, the B4 point, the B5 point and the C6 point of the guide vane (200) correspondingly abut against the A1 positioning pin (300), the A2 positioning pin (400), the A3 positioning pin (500), the B4 positioning block (600), the B5 positioning block (700) and the C6 positioning pin (800), and the abutting degree is checked by using a feeler gauge. S400: The upper edge plate and the lower edge plate of the blade basin side of the guide vane (200) are supported by the blade basin edge plate support assembly (2), and the horizontal movement of the guide vane (200) is limited in cooperation with the C6 positioning pin (800); S500: Whether loosening displacement occurs at the positioning point of the guide vane (200) is checked again by using a plug gauge, and if there is loosening displacement, timely fine adjustment is performed.

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