CN-121973062-A - Device and method for machining inner and outer circular arcs of upper and lower edge plates of turbine guide vane

CN121973062ACN 121973062 ACN121973062 ACN 121973062ACN-121973062-A

Abstract

The invention discloses a processing device and a processing method for inner and outer circular arcs of upper and lower edge plates of a turbine guide blade, wherein the processing device comprises a base, a centering clamping mechanism and a measuring mechanism which are arranged on the base, on-machine measurement of the circular arc surface and the end surface of the turbine guide blade is realized, repeated clamping and clamping errors brought by parts are avoided, the measuring efficiency and the measuring stability are improved, and the processing quality risk is reduced.

Inventors

XIAO JUN
WANG KECHANG
LI WEI
DING QI
LI MEIXING

Assignees

中国航发南方工业有限公司

Dates

Publication Date: 20260505
Application Date: 20260320

Claims (10)

1. The device is used for clamping and measuring the turbine guide blade, the turbine guide blade comprises a blade body, an upper edge plate and a lower edge plate which are respectively arranged on two sides of the blade body, the upper edge plate is provided with an outer arc surface and an outer arc surface end face, the lower edge plate is provided with an inner arc surface and an inner arc surface end face, and the device is characterized by comprising a base, a centering clamping mechanism and a measuring mechanism, wherein the centering clamping mechanism is arranged on the base, the centering clamping mechanism comprises a workpiece positioning seat and a pressing component, the workpiece positioning seat is matched with the shape of the turbine edge plate, a positioning cavity is formed in the workpiece positioning seat, the bottom positioning surface of the turbine guide blade is arranged in the positioning cavity, a clamp arc positioning surface is arranged in the positioning cavity, the pressing component is pressed on the mounting edge of the turbine guide blade, the measuring mechanism comprises a meter frame positioning seat, a meter frame positioning block, a meter frame and a dial indicator, the meter support, the meter positioning seat is fixedly arranged on the base, the meter frame positioning seat arc surface is arranged on the base, the meter positioning seat arc surface is arranged on the meter frame positioning seat arc surface, the meter positioning seat arc surface is arranged on the round arc surface, the surface to be arranged on the round arc surface and the round arc surface is arranged on the round arc surface and is arranged on the round surface, which corresponds to the round arc surface, and is fixedly arranged on the round surface, and the round surface.
2. The device for machining inner and outer circular arcs of upper and lower edge plates of turbine guide vane according to claim 1, wherein the positioning cavity is further provided with an angular positioning groove, and the angular positioning groove is matched with the circumferential side surface of the upper edge plate or the lower edge plate.
3. The device for machining inner and outer circular arcs of upper and lower edge plates of a turbine guide vane according to claim 1, wherein the pressing assembly comprises a plurality of pressing plates, and the pressing plates are fixed on the base through fastening bolts.
4. The device for machining inner and outer circular arcs of upper and lower edge plates of a turbine guide vane according to claim 1, wherein a standard counter-surface component is fixedly installed on the workpiece positioning seat, and the standard counter-surface component is provided with measuring surfaces corresponding to the outer circular arc surface and the inner circular arc surface of the turbine guide vane and the end surfaces of the upper and lower edge plates.
5. The device for machining inner and outer circular arcs of upper and lower edge plates of a turbine guide vane according to claim 4, wherein the measuring surface is 0.1mm smaller than the finished size of the machining surface required by the part.
6. The device for machining inner and outer circular arcs of upper and lower edge plates of turbine guide vanes according to claim 1, wherein a fit clearance between the table frame positioning blocks and the circular arc surfaces of the table frame positioning blocks is not more than 0.01mm.
7. The device for machining inner and outer circular arcs of upper and lower edge plates of a turbine guide vane according to claim 1, wherein a meter frame supporting seat is arranged at the other end of the meter frame opposite to the meter frame positioning block, and the meter frame supporting seat is arranged on a moving path of the meter frame and forms a support for the meter frame.
8. The device for machining inner and outer circular arcs of upper and lower edge plates of a turbine guide vane according to claim 1, wherein the dial indicator is fixedly installed on the meter frame through a set screw.
9. A method for processing inner and outer circular arcs of upper and lower edge plates of a turbine guide vane by adopting the processing device of any one of claims 1-8, which is characterized by comprising the following steps: s1, designing a profiling forming grinding wheel according to the circular arc section profile of a part; s2, fixing the part on the processing device; S3, performing rough grinding operation on the part by using the profiling forming grinding wheel, finishing tool setting by taking a workpiece as a reference before the rough grinding operation, performing first tool operation after the tool setting is finished, feeding the part far away from one side of the standard part in the tool feeding direction by taking the center of the part as an original point, finishing grinding operation of the part on one side, then installing a measuring mechanism to measure the size after grinding on the one side, adjusting the circle center position of an arc according to a measuring result, continuously grinding the other side after the size is adjusted to be qualified, and finishing the first tool grinding operation of the part, wherein the subsequent rough grinding process uses the reference determined by the first tool setting as a machining reference, and performing rough grinding operation according to a preset feed amount; S4, installing a measuring mechanism on the processing device after rough grinding is finished, and rotating a positioning block of the table frame to the position of a standard component of the table frame along the arc surface of the positioning seat of the table frame to perform the table checking operation; s5, taking down the measuring mechanism, and feeding according to the measured allowance value to finish the processing of the inner and outer circular arcs and the end faces of the part; S6, installing a measuring mechanism to measure the final machining size of each part.
10. The method for machining the inner and outer arcs of the upper and lower edge plates of the turbine guide vane according to claim 9, wherein the design of the molded grinding wheel in the step S1 comprises the following steps: S101, cutting a section of a zero crossing part in the direction perpendicular to the axial direction of a workpiece, acquiring the outline of an arc to be processed of an upper edge plate and a lower edge plate, and extracting the arc radian; s102, rotating the part to a machining angle, and defining a grinding wheel forming boundary and an avoiding area to obtain an actual section profile of a part to be machined in the posture; s103, designing the profiling forming grinding wheel according to the obtained actual section profile.

Description

Device and method for machining inner and outer circular arcs of upper and lower edge plates of turbine guide vane Technical Field The invention relates to the technical field of turbine guide vane machining, in particular to a device and a method for machining inner and outer circular arcs of upper and lower edge plates of a turbine guide vane. Background The turbine guide vane is divided into a single-link vane or a multi-link vane, the vane body is formed by precision casting, and the upper edge plate, the lower edge plate, the inner arc and the outer arc of the vane are required to be machined to ensure the assembly precision. The blade structure is shown in fig. 1 and 2, the inner and outer circular arcs of a part and the end faces of the inner and outer circular arcs are required to be machined, five-axis grinding equipment is adopted to grind the inner and outer circular arcs, a single-shape grinding wheel is adopted to divide the working steps of each part of the part, the machining process is shown in fig. 3, and only one position can be machined at a time due to the single grinding wheel, besides, the machining process of each position is left for rough grinding, detection and fine grinding, the part is required to be detached from a machine tool and a clamp after rough grinding is finished, the part is required to be sent to a three-dimensional measuring machine or a special measuring tool to detect the size of the inner and outer circular arcs and the end faces, the amount of the lower tool is adjusted according to the left of each surface, and the existing machining method has the technical problems that 1, the existing technology adopts a grinding wheel with single shape, the number of times of feeding is high, the machining efficiency is low, each part of the single working procedure needs to be roughly ground by 3 tools and 1 tool, if the number of times of feeding is 12 times, the grinding wheel with the width of 20mm is only about 10mm, and the existing grinding wheel with the actual participation in grinding is required to be carried out, and the grinding is required to be finished, and the machining is required to be carried out for the machining is carried out by carrying out for the grinding operation for the tube, and the machining is required to be carried out for the machining is carried out for the machining, and is high, and the machining is required to be carried out, and is the is required to be carried out and is to be carried out. Publication number CN111750817B discloses a detection device and a detection method for an arc surface of a blade, wherein the detection device comprises a bottom plate, a first arc guide rail, a first indicator, a first meter frame assembly and a positioning and clamping device for positioning the blade to be detected, wherein the first arc guide rail, the first indicator and the first meter frame assembly are arranged on the bottom plate; the invention discloses a positioning clamping device, which comprises a first arc guide rail, a first arc guide surface, a first table frame component, a second arc guide rail, a stand column, a table rod connector and an indicator sheet, wherein the first arc guide surface is arranged on one side of the first arc guide rail, far away from the positioning clamping device, and is concentric with a first arc surface to be detected of a blade to be detected, the first table frame component comprises a table seat, the bottom of the table seat is attached to the upper surface of the first arc guide rail, a positioning pin is arranged at the bottom of the table seat, the side wall of the positioning pin is attached to the first arc guide surface, the stand column is arranged at the top of the table seat, the table rod connector is clamped on the stand column and is connected with a table rod of the first indicator sheet, the indicator sheet is only arranged on the indicator sheet corresponding to the arc surface, synchronous measurement of the inner arc surface and the outer arc surface and the end surface of the blade edge sheet cannot be carried out at the same time, the multi-surface measurement requirement of the inner arc surface and the outer arc surface and the end surface to be solved by the invention is not met, the first arc guide rail and the second arc guide rail is independently moved, and the two arc guide rails are not concentric, and the measurement references are not synchronous, and the measurement tracks are directly caused, the relative to each other is difficult to reflect the relative position error of the inner arc and the inner arc surface and the relative measurement error is difficult to avoid. Disclosure of Invention In order to solve the technical problems, the invention provides an inner and outer arc machining device and method for upper and lower edge plates of a turbine guide blade. In order to achieve the above purpose, the present invention adopts the following technical scheme: The ut