Reconfigurable zero-point positioning clamp special for steam turbine stationary blade

Abstract

The utility model provides a reconfigurable zero-point positioning fixture special for a steam turbine stationary blade, which is used for positioning and clamping the steam turbine stationary blade and comprises a fixture body and a zero-point positioning component. The fixture body comprises a bottom plate, a main positioning assembly installed on the bottom plate in a turnover mode, a first auxiliary positioning assembly and a second auxiliary positioning assembly, wherein the first auxiliary positioning assembly and the second auxiliary positioning assembly are selectively installed on the bottom plate. The zero-point positioning fixture is configured to have a first machining posture and a second machining posture. According to the scheme, assembling is easy, using is convenient, the reconfigurable performance is achieved, clamping of the stationary blade in two machining postures can be achieved through assembling and disassembling reassembling, positioning of the datum plane cannot be changed in the assembling and reassembling process, and stable clamping of the blade can be achieved; the device can be applied to an automatic production line, realizes quick change and zero point positioning functions, does not need to meter each time to determine whether the blade position is correct or not, reduces manpower consumption, improves labor efficiency, and adapts to the requirements of the automatic production line.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, and in particular to a reconfigurable zero-point positioning fixture for steam turbine stator blades in the field of air film hole processing on the surface of steam turbine stator blades in an automated production line. Background Art

[0002] At present, the country is vigorously developing industrial intelligence, and the processing of turbine stator blade air film holes is becoming more and more intelligent. Through the automated production line, workers only need to put the parts to be processed in the parts loading and unloading station. After the parts enter the line, the bus robot is responsible for the turnover, and finally completes the inspection and processing of the parts. Therefore, accurate positioning of the workpiece is the premise and guarantee of accurate processing.

[0003] Since the turbine stator blades are curved surfaces, the positions of the air film holes to be processed are relatively complex. Before processing, it is necessary to determine whether the turbine blades have been installed in the correct installation positions of the pinhole machine and the measuring machine. Otherwise, it is difficult to ensure accuracy, and the processing will also result in the output of waste due to deviations in the installation position.

[0004] In the process of implementing the present utility model, the applicant found that the conventional fixtures for clamping turbine stationary blades have at least the following problems:

[0005] 1. Existing conventional fixtures cannot guarantee the precise positioning of turbine stator blades, which will lead to precision problems in the processing of air film holes on the blades.

[0006] 2. The use of existing conventional fixtures and fixtures cannot achieve zero-point quick change in the automated production line, resulting in low processing efficiency.

[0007] 3. When using existing conventional tooling and fixtures, when it is necessary to perform electromachining of air film holes in multiple areas of a steam turbine stator blade, multiple sets of tooling and fixtures are required to cooperate. For example, the first set of tooling and fixtures is needed to clamp and position a part of the steam turbine stator blade, and then the first area of ​​the positioned steam turbine stator blade is processed. After processing the holes in the first area, the second set of tooling and fixtures is used to clamp and position another part of the steam turbine stator blade, and then the second area of ​​the positioned steam turbine stator blade is processed. This approach requires the use of multiple sets of tooling and fixtures, and different parts of the steam turbine stator blade need to be positioned. One is that the number of tooling and fixtures increases, which is inconvenient to operate and manage. Another is that the positioning of the steam turbine stator blade needs to be repeated in an electromachining system, which is cumbersome and will make the positioning inaccurate, resulting in reduced processing quality.

[0008] In view of this, how to solve the problems of the above-mentioned turbine stator blade workpieces in the processing process in the automated production line, such as the inability to guarantee positioning accuracy, the inability to achieve zero-point quick change, the need to use multiple tooling fixtures, and repeated positioning, has become the research content of this topic. Utility Model Content

[0009] The utility model provides a zero-point positioning fixture specially used for steam turbine stationary blades with reconfigurability.

[0010] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a reconfigurable steam turbine stator blade dedicated zero-point positioning fixture, which is used for positioning and clamping the steam turbine stator blade. The steam turbine stator blade has a main positioning part, a first auxiliary positioning part, and a second auxiliary positioning part. The innovative point is:

[0011] The zero point positioning fixture comprises a fixture body and a zero point positioning component;

[0012] The clamp body comprises a bottom plate, a main positioning component which can be flipped and mounted on the bottom plate, and a first auxiliary positioning component and a second auxiliary positioning component which can be selectively mounted on the bottom plate;

[0013] The main positioning assembly is an assembly for positioning and clamping the main positioning part of the turbine stator blade, and the main positioning assembly is directly mounted on the bottom plate or turned over and mounted on the bottom plate through a side transition plate;

[0014] The first auxiliary positioning component is a component for positioning and clamping the first auxiliary positioning part of the steam turbine stator blade, and the second auxiliary positioning component is a component for positioning and clamping the second auxiliary positioning part of the steam turbine stator blade;

[0015] The zero point positioning assembly includes a positioning piece and a rivet, and the positioning piece and the rivet are positioned and installed at the bottom of the base plate;

[0016] The zero-point positioning fixture is configured to have a processing posture 1 and a processing posture 2, wherein:

[0017] In the first processing posture, the main positioning assembly is directly mounted on the bottom plate and positions and clamps the main positioning portion of the steam turbine stator blade, and the first secondary positioning assembly is mounted on the bottom plate and positions and clamps the first secondary positioning portion of the steam turbine stator blade;

[0018] In the second processing posture, the main positioning assembly is flipped from the first processing posture and installed on the bottom plate through the side transition plate, and the second secondary positioning assembly is installed on the bottom plate and positions and clamps the second secondary positioning part of the turbine stator blade.

[0019] The relevant contents in the above technical solution are explained as follows:

[0020] 1. In the present utility model, in view of the problems that such steam turbine stator blade workpieces cannot guarantee positioning accuracy, cannot achieve zero-point quick change, need to use multiple fixtures, and repeated positioning exist in the process of processing in the automated production line, a reconfigurable steam turbine stator blade special zero-point positioning fixture is designed. The zero-point positioning fixture can be used to quickly and accurately position the steam turbine stator blade and perform zero-point positioning. The zero-point positioning fixture is reconfigurable and can be reconfigured and switched between processing posture 1 and processing posture 2. The zero-point positioning fixture consists of a fixture body and a zero-point positioning component. The fixture body includes a bottom plate, a main positioning component that can be flipped and mounted on the bottom plate, and a first secondary positioning component and a second secondary positioning component that are selectively mounted on the bottom plate. The zero-point positioning fixture is configured to have processing posture 1 and processing posture 2. In the processing posture one, the main positioning component is directly mounted on the base plate and positions and clamps the main positioning part of the turbine stator blade, and the first secondary positioning component is mounted on the base plate and positions and clamps the first secondary positioning part of the turbine stator blade; in the processing posture two, the main positioning component is flipped from the processing posture one and mounted on the base plate through the side transition plate, and the second secondary positioning component is mounted on the base plate and positions and clamps the second secondary positioning part of the turbine stator blade, so as to quickly and accurately position the turbine stator blade, and the main positioning component is designed to be flippably mounted on the base plate, and the first secondary positioning component and the second secondary positioning component are selectively mounted on the base plate, and the zero-point positioning component on the zero-point positioning fixture can be quickly connected with an external standard chuck through a pull nail to achieve zero-point quick change. Therefore, the utility model is simple to assemble, easy to use, and has reconfigurable performance. The stationary blades can be clamped in two processing postures through assembly and disassembly and reassembly, and the positioning of the reference surface will not be changed during the assembly and reconstruction process, so the blades can be stably clamped. The design of the utility model takes into account the installation of positioning plates and rivets, and can be used in automated production lines to realize quick change and zero point positioning functions. There is no need to use a meter to determine whether the blade position is correct each time, which reduces manpower consumption, improves labor efficiency, and adapts to the needs of automated production lines.

[0021] 2. In the above scheme, the main positioning assembly includes a deformation piece, a conforming pressure plate, a U-shaped block, a positioning block, and a process pressure plate; the deformation piece and the process pressure plate are used to clamp and fix the upper and lower surfaces of the main positioning part of the turbine stator blade; the deformation piece, the conforming pressure plate, the U-shaped block, and the process pressure plate are used to clamp and fix the front and rear surfaces of the main positioning part of the turbine stator blade. This scheme enables the positioning assembly to accurately position and firmly clamp the positioning reference on the main positioning part.

[0022] 3. In the above scheme, in processing posture 1, the bottom of the deformable sheet and the conformable pressure plate are fixedly mounted on the bottom plate; in processing posture 2, the bottom of the deformable sheet and the conformable pressure plate are fixedly mounted on the side transition plate, and the side transition plate is fixed to the bottom plate after the main positioning assembly is flipped 90° relative to processing posture 1. This scheme can achieve the positioning of the reference surface without changing in processing posture 1 and processing posture 2, and can achieve stable clamping of the blade.

[0023] 4. In the above technical solution, the process plate is provided with a plurality of process holes for processing the air film holes on the main positioning part of the turbine stator blade, and the process holes are arranged obliquely. This design is reasonably arranged and has no interference with the fixture, which can make the processing of the turbine stator blade more reasonable and efficient.

[0024] 5. In the above technical solution, a horizontal deformation groove is provided on the deformation sheet, and the deformation part is located above the deformation groove. The deformation groove is provided with a screw groove, and a nut is installed in the screw groove. A bolt passes through the top of the process pressing plate and is screwed with the nut. The bolt drives the nut to move, and then drives the deformation part at the nut to deform, so that the turbine stator blade is clamped and positioned. This solution realizes the precise positioning and reliable clamping of the reference surface on the turbine stator blade.

[0025] 6. In the above technical solution, the first auxiliary positioning assembly includes a straight pressure plate and a transition block. In the processing posture 1, the transition block is fixedly mounted on the bottom plate, and the upper and lower surfaces of the first auxiliary positioning part of the turbine stator blade are clamped and fixed by screws between the straight pressure plate and the transition block. This solution further ensures the stable clamping of the blade in the processing posture 1.

[0026] 7. In the above technical solution, the second auxiliary positioning assembly includes a bending plate and a support block. In the second processing posture, the support block is fixedly mounted on the bottom plate, and the front and rear surfaces of the second auxiliary positioning portion of the turbine stator blade are clamped and fixed by screws between the bending plate and the support block. This solution further ensures the stable clamping of the blade in the second processing posture.

[0027] 9. In this utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] 10. In the present utility model, the orientation or position relationship indicated by the terms "center", "upper", "lower", "axial", "bottom", "inner", "outer", etc. is based on the orientation or position assembly relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] 11. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] Due to the application of the above scheme, the utility model has the following advantages and effects compared with the prior art:

[0031] 1. In the above scheme of the utility model, the zero-point positioning fixture can be used to quickly and accurately position and zero-point position the turbine stator blades, and has reconfigurability, and can be reconfigured and switched between processing posture one and processing posture two. The zero-point positioning fixture consists of a clamp body and a zero-point positioning component. The clamp body includes a base plate, a main positioning component that can be flipped and mounted on the base plate, and a first secondary positioning component and a second secondary positioning component that are selectively mounted on the base plate. The zero-point positioning fixture is configured to have processing posture one and processing posture two, so as to quickly and accurately position the turbine stator blades. The main positioning component is designed to be flippably mounted on the base plate, and the first secondary positioning component and the second secondary positioning component are selectively mounted on the base plate. The zero-point positioning component on the zero-point positioning fixture can be quickly connected to an external standard chuck through a rivet action to achieve zero-point quick change.

[0032] 2. In the above scheme of the utility model, the utility model is simple to assemble, easy to use, and has reconfigurable performance. The stationary blades can be clamped in two processing postures through assembly and disassembly and reassembly, and the positioning of the reference surface will not be changed during the assembly and reconstruction process, so the blades can be stably clamped. The design of the utility model takes into account the installation of positioning plates and rivets, and can be used in automated production lines to realize quick change and zero-point positioning functions. There is no need to use a meter every time to determine whether the blade position is correct, which reduces manpower consumption, improves labor efficiency, and adapts to the needs of automated production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figures 1A to 1D Schematic diagrams of the embodiment of the utility model in the first processing posture;

[0034] Figure 2A ,2B Schematic diagrams of the embodiment of the utility model in the second processing posture;

[0035] Figure 3 It is a three-dimensional schematic diagram of a process pressing plate in an embodiment of the utility model;

[0036] Figure 4 It is a three-dimensional schematic diagram of a deformation sheet in an embodiment of the utility model;

[0037] Figure 5 This is a schematic diagram of a clamping deformation sheet used in an embodiment of the utility model;

[0038] FIG. 6A to FIG. 6E It is a schematic diagram of the use process of the embodiment of the utility model and the process of reconstructing from processing posture one to processing posture two.

[0039] In the above attached figure:

[0040] 1 Bottom plate

[0041] 2 Main positioning components

[0042] 21 Deformation film

[0043] 211 Deformation groove

[0044] 212 Deformation

[0045] 213 Screw groove

[0046] 214 Nut

[0047] 215 Bolt

[0048] 22 Conformal pressure plate

[0049] 23 U-shaped block

[0050] 24 Positioning block

[0051] 25 Process Platen

[0052] 251 Process holes

[0053] 3. The first positioning assembly

[0054] 31 Straight Plate

[0055] 32 Transition Block

[0056] 4 Second positioning assembly

[0057] 41 bending plate

[0058] 42 Support block

[0059] 5. Side transition plate

[0060] 6 Zero point positioning assembly

[0061] 9 Steam turbine stator blades

[0062] 91 Main positioning unit

[0063] 92 First auxiliary positioning unit

[0064] 93: Second auxiliary positioning unit. DETAILED DESCRIPTION

[0065] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0066] The technical solution of the utility model is used for positioning and clamping a steam turbine stator blade 9, and the steam turbine stator blade 9 has a main positioning portion 91, a first auxiliary positioning portion 92, and a second auxiliary positioning portion 93. The utility model aims to address the problems of such steam turbine stator blades 9 in the process of processing in an automated production line, such as the inability to guarantee positioning accuracy, the inability to achieve zero-point quick change, the need to use multiple tooling fixtures, and repeated positioning. A reconfigurable steam turbine stator blade-specific zero-point positioning fixture is designed. The zero-point positioning fixture can be used to quickly and accurately position and zero-point the steam turbine stator blade 9, and the utility model has reconfigurability and can be reconfigured and switched between processing posture one and processing posture two.

[0067] The following describes it in detail with reference to specific embodiments.

[0068] refer to Figures 1A to 1D , Figure 2A , 2B As shown, an embodiment of the utility model proposes a reconfigurable zero-point positioning fixture for steam turbine stator blades, which is used for positioning and clamping steam turbine stator blades 9. The zero-point positioning fixture includes a clamp body and a zero-point positioning component 6; the clamp body includes a base plate 1, a main positioning component 2 that can be flipped and installed on the base plate 1, and a first auxiliary positioning component 3 and a second auxiliary positioning component 4 that are selectively installed on the base plate 1.

[0069] In the embodiment of the utility model, Figures 1A to 1DAs shown, the main positioning component 2 is a component of the main positioning part 91 for positioning and clamping the turbine stator blade 9, and the main positioning component 2 is directly installed on the base plate 1 or is turned over and installed on the base plate 1 through the side transition plate 5; the first auxiliary positioning component 3 is a component of the first auxiliary positioning part 92 for positioning and clamping the turbine stator blade 9, and the second auxiliary positioning component 4 is a component of the second auxiliary positioning part 93 for positioning and clamping the turbine stator blade 9; the zero point positioning component 6 includes a positioning plate and a rivet, and the positioning plate and the rivet are positioned and installed at the bottom of the base plate 1.

[0070] In the embodiment of the utility model, the zero-point positioning fixture is configured to have a processing posture 1 and a processing posture 2, wherein:

[0071] In the processing posture, such as Figure 1D As shown, the main positioning assembly 2 is directly mounted on the bottom plate 1 and positions and clamps the main positioning portion 91 of the steam turbine stationary blade 9, and the first secondary positioning assembly 3 is mounted on the bottom plate 1 and positions and clamps the first secondary positioning portion 92 of the steam turbine stationary blade 9;

[0072] In the second processing posture, Figure 2B As shown, the main positioning component 2 is flipped from the processing posture and installed on the base plate 1 through the side transition plate 5, and the second auxiliary positioning component 4 is installed on the base plate 1 and positions and clamps the second auxiliary positioning part 93 of the turbine stator blade 9.

[0073] Through the implementation of the embodiment of the utility model, a reconfigurable zero-point positioning fixture for steam turbine stator blades is designed. The zero-point positioning fixture can be used to quickly and accurately position and zero-point position the steam turbine stator blade 9, and is reconfigurable and can be reconfigured and switched between processing posture one and processing posture two. The zero-point positioning fixture consists of a clamp body and a zero-point positioning component 6. The clamp body includes a base plate 1, a main positioning component 2 that can be flipped and installed on the base plate 1, and a first secondary positioning component 3 and a second secondary positioning component 4 that are selectively installed on the base plate 1. The zero-point positioning fixture is configured to have processing posture one and processing posture two. In processing posture one, the main positioning component 2 is directly installed on the base plate 1 and the main positioning portion 9 of the steam turbine stator blade 9 is reconfigured. 1 is used for positioning and clamping, the first secondary positioning component 3 is installed on the base plate 1 and positions and clamps the first secondary positioning part 92 of the turbine stator blade 9; in the processing posture 2, the main positioning component 2 is turned over from the processing posture 1 and installed on the base plate 1 through the side transition plate 5, the second secondary positioning component 4 is installed on the base plate 1 and positions and clamps the second secondary positioning part 93 of the turbine stator blade 9, so as to quickly and accurately position the turbine stator blade 9, the main positioning component 2 is designed to be flippably installed on the base plate 1, the first secondary positioning component 3 and the second secondary positioning component 4 are selectively installed on the base plate 1, and the zero point positioning component 6 on the zero point positioning fixture can be quickly connected with the external standard chuck through the action of the rivet to realize the zero point quick change.

[0074] In the embodiment of the present utility model, Figures 1A to 1D As shown, the main positioning assembly 2 includes a deformation piece 21, a conforming pressure plate 22, a U-shaped block 23, a positioning block 24, and a process pressure plate 25; the deformation piece 21 and the process pressure plate 25 are used to clamp and fix the upper and lower surfaces of the main positioning part 91 of the turbine stator blade 9; the deformation piece 21, the conforming pressure plate 22, the U-shaped block 23, and the process pressure plate 25 are used to clamp and fix the front and rear surfaces of the main positioning part 91 of the turbine stator blade 9. This solution enables the positioning assembly to accurately position and firmly clamp the positioning reference on the main positioning part 91. Figure 1D shown.

[0075] In the embodiment of the present utility model, Figure 1D As shown, in the processing posture 1, the bottom of the deformable sheet 21 and the conformable pressing plate 22 are fixedly mounted on the bottom plate 1; Figure 2B As shown, in the processing posture 2, the bottom of the deformable sheet 21 and the conformable pressure plate 22 are fixedly mounted on the side transition plate 5, and the side transition plate 5 is fixed to the bottom plate 1 after the main positioning assembly 2 is flipped 90° relative to the processing posture 1. This solution can achieve the positioning of the reference surface without changing the processing posture 1 and the processing posture 2, and can achieve stable clamping of the blade.

[0076] In the embodiment of the present utility model, Figure 3 As shown, the process plate 25 is provided with a plurality of process holes 251 for processing the air film holes on the main positioning part 91 of the turbine stationary blade 9, and the process holes 251 are arranged obliquely. This design is reasonably arranged and has no interference with the fixture, which can make the processing of the turbine stationary blade 9 more reasonable and efficient.

[0077] In the embodiment of the present utility model, Figure 4 , Figure 5 As shown, a horizontal deformation groove 211 is provided on the deformation sheet 21, and a deformation portion 212 is located above the deformation groove 211. The deformation groove 211 is provided with a screw groove 213, and a nut 214 is assembled in the screw groove 213. A bolt 215 passes through the top of the process pressure plate 25 and is screwed with the nut 214. The bolt 215 drives the nut 214 to displace, thereby driving the deformation portion 212 at the nut 214 to deform, so that the turbine stator blade 9 is clamped and positioned. This solution realizes the precise positioning and reliable clamping of the reference surface on the turbine stator blade 9.

[0078] In the embodiment of the present utility model, Figure 1A As shown, the first auxiliary positioning assembly 3 includes a straight pressure plate 31 and a transition block 32. In the processing posture 1, the transition block 32 is fixedly mounted on the bottom plate 1, and the upper and lower surfaces of the first auxiliary positioning portion 92 of the turbine stationary blade 9 are clamped and fixed by screws between the straight pressure plate 31 and the transition block 32. This solution further ensures the stable clamping of the blade in the processing posture 1.

[0079] In the embodiment of the present utility model, Figure 2A As shown, the second auxiliary positioning assembly 4 includes a bending plate 41 and a support block 42. In the second processing posture, the support block 42 is fixedly mounted on the bottom plate 1. The front and rear surfaces of the second auxiliary positioning portion 93 of the turbine stationary blade 9 are clamped and fixed by screws between the bending plate 41 and the support block 42. This solution further ensures the stable clamping of the blade in the second processing posture.

[0080] The solution of the utility model is described below with a specific detailed embodiment.

[0081] In a reconfigurable zero-point positioning fixture for steam turbine stator blades proposed in this detailed embodiment, the zero-point positioning fixture includes a base plate 1, a main positioning component 2, a first auxiliary positioning component 3, a second auxiliary positioning component 4, and a zero-point positioning component 6; the main positioning component 2 includes a deformation sheet 21, a conformal pressure plate 22, a U-shaped block 23, a positioning block 24, and a process pressure plate 25, and the process pressure plate 25 is provided with a plurality of process holes 251 for processing the air film holes on the main positioning part 91 of the steam turbine stator blade 9, and the process holes 251 are arranged obliquely, and the deformation sheet 21 A horizontal deformation groove 211 is opened on it, and above the deformation groove 211 is a deformation part 212. The deformation groove 211 is provided with a screw groove 213, and a nut 214 is assembled in the screw groove 213. A bolt 215 passes through the top of the process pressure plate 25 and is screwed with the nut 214. The bolt 215 drives the nut 214 to displace, and then drives the deformation part 212 at the nut 214 to deform, so that the turbine stator blade 9 is clamped and positioned; the first auxiliary positioning component 3 includes a straight pressure plate 31 and a transition block 32; the second auxiliary positioning component 4 includes a bent pressure plate 41 and a support block 42.

[0082] The application of this detailed embodiment has processing posture one and processing posture two.

[0083] Processing posture 1:

[0084] The upper and lower surfaces of the main positioning part 91 of the turbine stator blade 9 are clamped and fixed between the deformation piece 21 and the process pressure plate 25 by screws; the front and rear surfaces of the main positioning part 91 of the turbine stator blade 9 are clamped and fixed between the deformation piece 21, the conformal pressure plate 22, the U-shaped block 23 and the process pressure plate 25 by screws; the bottom of the deformation piece 21 and the conformal pressure plate 22 are fixedly installed on the bottom plate 1; the transition block 32 is fixedly installed on the bottom plate 1, and the upper and lower surfaces of the first secondary positioning part 92 of the turbine stator blade 9 are clamped and fixed between the straight pressure plate 31 and the transition block 32 by screws.

[0085] Working posture 2:

[0086] The upper and lower surfaces of the main positioning part 91 of the turbine stator blade 9 are clamped and fixed between the deformation piece 21 and the process pressure plate 25 by screws; the front and rear surfaces of the main positioning part 91 of the turbine stator blade 9 are clamped and fixed between the deformation piece 21, the follow-shaped pressure plate 22, the U-shaped block 23 and the process pressure plate 25 by screws; the bottom of the deformation piece 21 and the follow-shaped pressure plate 22 are fixedly installed on the side transition plate 5, and the side transition plate 5 is fixed to the bottom plate 1 after the main positioning component 2 is flipped 90° relative to the processing posture; the support block 42 is fixedly installed on the bottom plate 1, and the front and rear surfaces of the second secondary positioning part 93 of the turbine stator blade 9 are clamped and fixed between the bending pressure plate 41 and the support block 42 by screws.

[0087] The detailed embodiment of the use and assembly process of a reconfigurable steam turbine stator blade dedicated zero point positioning fixture FIG. 6A to FIG. 6E As shown, the assembly process can be divided into 5 steps, the first 2 steps are clamping of the workpiece in processing posture 1, and the last step is clamping of the workpiece in processing posture 2.

[0088] 1. Position the part deformation sheet 21, transition block 32, and conformal pressure plate 22 to the part bottom plate 1 through the dowel holes and fix them with screws.

[0089] 2. Place the parts on the above assembly according to the positioning reference plane, and clamp them by screws, nuts 214, part straight pressing plate 31, U-shaped block 23, positioning block 24, and process pressing plate 25.

[0090] 3. Position the part side transition plate 5 and the support block 42 to the part bottom plate 1 through the dowel holes and fix them with screws.

[0091] 4. The workpiece and the above-mentioned assembly are clamped according to the positioning reference plane by means of screws, the part bending plate 41 and the conforming plate 22.

[0092] 5. Use screws to fix the part zero point positioning assembly 6 according to the holes opened in the base plate 1.

[0093] It can be seen from the above implementation steps that in the zero-point positioning fixture of the utility model, the clamp body is connected to the positioning sheet by screws, and the clamp body and the standard chuck are connected by the action of the rivets. First, the fixture is assembled in place through the dowel holes. Secondly, according to the process requirements, the workpiece is positioned according to the three specified reference surfaces D, E, and F. Finally, the bolt 215, nut 214, and pressure plate are used to accurately position and clamp. The bolt 215 drives the nut 214 to displace, and then drives the thin sheet at the nut 214 to deform, so that the workpiece is positioned to the reference surface D. By pushing the pressure plate by the set screw, the workpiece can be positioned to the E and F surfaces and clamped. The utility model is simple to assemble, easy to use, and has reconfigurable performance. The stationary blades can be clamped in two processing postures through assembly and disassembly and reassembly, and the positioning of the reference surface will not be changed during the assembly and reconstruction process, so the blades can be stably clamped. The design of the utility model takes into account the installation of positioning plates and rivets, and can be used in automated production lines to realize quick change and zero point positioning functions. There is no need to use a meter each time to determine whether the blade position is correct, which reduces manpower consumption, improves labor efficiency, and adapts to the needs of automated production lines.

[0094] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A reconfigurable zero-point positioning fixture for a steam turbine stator blade, used for positioning and clamping a steam turbine stator blade (9), wherein the steam turbine stator blade (9) comprises a main positioning portion (91), a first auxiliary positioning portion (92), and a second auxiliary positioning portion (93), and is characterized in that: The zero-point positioning fixture comprises a fixture body and a zero-point positioning component (6); The clamp body comprises a base plate (1), a main positioning component (2) which is flippably mounted on the base plate (1), and a first auxiliary positioning component (3) and a second auxiliary positioning component (4) which are selectively mounted on the base plate (1); The main positioning assembly (2) is an assembly used for positioning and clamping the main positioning part (91) of the steam turbine stator blade (9), and the main positioning assembly (2) is directly mounted on the base plate (1) or is mounted on the base plate (1) through a side transition plate (5) after being turned over; The first auxiliary positioning component (3) is a component for positioning and clamping a first auxiliary positioning portion (92) of the steam turbine stator blade (9), and the second auxiliary positioning component (4) is a component for positioning and clamping a second auxiliary positioning portion (93) of the steam turbine stator blade (9); The zero point positioning assembly (6) comprises a positioning piece and a pull nail, and the positioning piece and the pull nail are positioned and installed at the bottom of the base plate (1); The zero-point positioning fixture is configured to have a processing posture 1 and a processing posture 2, wherein: In the first processing posture, the main positioning component (2) is directly mounted on the base plate (1) and positions and clamps the main positioning part (91) of the steam turbine stator blade (9), and the first secondary positioning component (3) is mounted on the base plate (1) and positions and clamps the first secondary positioning part (92) of the steam turbine stator blade (9); In the second processing posture, the main positioning component (2) is turned over from the first processing posture and installed on the base plate (1) through the side transition plate (5), and the second auxiliary positioning component (4) is installed on the base plate (1) and positions and clamps the second auxiliary positioning part (93) of the turbine stator blade (9).

2. The zero-point positioning fixture for steam turbine stator blades with reconfigurability according to claim 1 is characterized in that: The main positioning assembly (2) comprises a deformation piece (21), a conforming pressure plate (22), a U-shaped block (23), a positioning block (24), and a process pressure plate (25); the upper and lower surfaces of the main positioning portion (91) of the steam turbine stator blade (9) are clamped and fixed between the deformation piece (21) and the process pressure plate (25); the front and rear surfaces of the main positioning portion (91) of the steam turbine stator blade (9) are clamped and fixed between the deformation piece (21), the conforming pressure plate (22), the U-shaped block (23), and the process pressure plate (25).

3. The reconfigurable zero-point positioning fixture for steam turbine stator blades according to claim 2 is characterized in that: In processing posture one, the bottom of the deformable sheet (21) and the conformable pressure plate (22) are fixedly mounted on the bottom plate (1); In the second processing posture, the bottom of the deformation sheet (21) and the conformal pressure plate (22) are fixedly mounted on the side transition plate (5), and the side transition plate (5) is fixed to the bottom plate (1) after the main positioning assembly (2) is flipped 90 degrees relative to the first processing posture.

4. The reconfigurable zero-point positioning fixture for steam turbine stator blades according to claim 2 is characterized in that: The process pressing plate (25) is provided with a plurality of process holes (251) for processing air film holes on the main positioning portion (91) of the turbine stator blade (9), and the process holes (251) are arranged obliquely.

5. The reconfigurable zero-point positioning fixture for steam turbine stator blades according to claim 2 is characterized in that: The deformation sheet (21) is provided with a horizontal deformation groove (211), and the deformation portion (212) is located above the deformation groove (211). The deformation groove (211) is provided with a screw groove (213), and a nut (214) is installed in the screw groove (213). A bolt (215) passes through the top of the process pressure plate (25) and is screwed to the nut (214). The bolt (215) drives the nut (214) to move, thereby driving the deformation portion (212) at the nut (214) to deform, so that the turbine stator blade (9) is clamped and positioned.

6. The reconfigurable zero-point positioning fixture for steam turbine stator blades according to claim 2 is characterized in that: The first auxiliary positioning assembly (3) includes a straight pressure plate (31) and a transition block (32). In the first processing posture, the transition block (32) is fixedly mounted on the base plate (1), and the upper and lower surfaces of the first auxiliary positioning portion (92) of the turbine stator blade (9) are clamped and fixed between the straight pressure plate (31) and the transition block (32) by screws.

7. The reconfigurable zero-point positioning fixture for steam turbine stator blades according to claim 2 is characterized in that: The second auxiliary positioning assembly (4) comprises a bending plate (41) and a support block (42). In the second processing posture, the support block (42) is fixedly mounted on the base plate (1), and the front and rear surfaces of the second auxiliary positioning portion (93) of the turbine stator blade (9) are clamped and fixed between the bending plate (41) and the support block (42) by screws.

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