CN112276496B - Method for solving deformation of low-pressure turbine disc in machining process - Google Patents
Method for solving deformation of low-pressure turbine disc in machining process Download PDFInfo
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- CN112276496B CN112276496B CN202011199926.XA CN202011199926A CN112276496B CN 112276496 B CN112276496 B CN 112276496B CN 202011199926 A CN202011199926 A CN 202011199926A CN 112276496 B CN112276496 B CN 112276496B
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- shot blasting
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- broaching
- mortise
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a method for solving the machining process deformation of a low-pressure turbine disc, which comprises the steps of turning process step line control, clamping control in the broaching process, finish turning process in the process of shot blasting and other processes, wherein a 0.2mm allowance is reserved for a reference and a related matching surface after finish turning, the side edge of a repair mortise and the roundness of a disc center after broaching are used as subsequent references, the inner side and the outer side of a deformed part of a mounting edge are repaired after milling, and the final finish machining is carried out on the mounting surface and a mounting hole in place after shot blasting is finished, so that the technical problem that the low-pressure turbine disc deforms in the machining process is effectively solved.
Description
Technical Field
The invention relates to the technical field of machining of a low-pressure turbine disc made of a novel material of an aero-engine, in particular to a method for solving the deformation of the low-pressure turbine disc in the machining process.
Background
The turbine disc is the most critical core rotating part in the aero-engine, the working condition and the environment are severe, the dual overlapping action of high temperature and high pressure needs to be borne, the manufacturing process is complex, the technical requirement is high, and the turbine disc is one of the difficult problems which restrict the development of the aero-engine in China for a long time; the low-pressure turbine disc is a large-diameter thin-wall part easy to deform at present, and is easily influenced by factors such as improper clamping force, uneven cutting force, high-speed broaching and shot blasting in the machining process to cause deformation.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for solving the deformation of a low-pressure turbine disc in the machining process, so as to solve the technical problem that the low-pressure turbine disc is very easy to deform in the machining process in the prior art.
In order to achieve the above object, the present invention provides a method for solving the deformation of a low-pressure turbine disk during machining process, which comprises the following steps:
turning process step route control is involved, turning adjustment allowance distribution is carried out in 4 processes, finish turning process allowance is carried out in 0.5mm, and two processes of 4 cutters are carried out, wherein the first two cutters are machined to remove 0.15mm and 0.3mm each time, and the second two cutters are respectively removed to remove 0.1mm and 0.2 mm; each knife is divided into 5 steps to be executed respectively
The inner diameter of the car mounting edge and the disc center,
The inner side of the vehicle cantilever,
The inner side of the car web,
The inner side of the vehicle mounting edge,
Turning the outer contour of the cantilever and the mounting edge; each program has 10 working steps and the first knife is selected
-
The second knife is from
-
Sequentially carrying out the steps; deformation control in the turning process is carried out by means of a reciprocating route and an adjustable tool clamping;
clamping control in a broaching process is realized, a quick-change clamp is mounted on a rotary table of a broaching machine, radial coarse positioning is carried out by using a disc center, the end face is positioned at the side edge of a mortise, the angular direction of a turbine disc is positioned by using a diamond pin, then the excircle runout of the mortise is aligned to be not more than 0.01mm, the other surface of the mortise is pressed by using a force more than 500N, and the mortise positioning and pressing surface is provided with an avoidance groove to be pressed by a maximum contact surface;
the method comprises the following steps of (1) relating to process control in a shot blasting process, wherein different influence degrees of each shot blasting part on part deformation are mainly considered in the shot blasting process, and locally adjusting a shot blasting angle and a shot blasting sequence on the premise of ensuring the shot blasting strength and coverage rate, wherein the shot blasting is substituted into an oblique angle of 60-75 degrees from inside to outside and from the inner side to the center of a disk, and the outer side surface is vertical to a plane where the center of the disk is located;
the method comprises the following steps of (1) allowance distribution after finish turning, reserving a little repair amount at an easily deformed part after the finish turning process, reserving 0.1mm at the side edge of a mortise, reserving 0.1mm at a disc center, reserving 0.2mm at each of two sides of an installation edge, and then broaching;
the method comprises the following steps that (1) datum repair after broaching is related, after broaching is finished, certain deformation occurs to two side edge planes of a mortise and the roundness of a disc center, the two side edges and the disc center are trimmed to 0.01 through a grinding method, and the two side edges and the disc center are used as datum planes for subsequent processing;
the repair of the easy-to-deform part after groove milling is carried out, the allowance of the two mounting edges after lace and mounting hole milling is larger, the size and the planeness of the mounting edge part are greatly deformed, the turning repair is carried out about 0.1mm after the working procedure, and the good state of the part before shot blasting is ensured;
the final assembly size precision after shot blasting is guaranteed, after the shot blasting of the part is finished, the matching surfaces of the mounting edges on the two sides are processed by driving or grinding to guarantee the assembly size and the jumping requirement, and then the assembly holes on the two sides are finely bored in place; and the aperture size and the position degree are ensured to meet the matching precision required by the design drawing.
Compared with the prior art, the invention has the following beneficial effects: according to the method for solving the machining process deformation of the low-pressure turbine disc, the machining process is subjected to finish turning through the processes of turning process step line control, clamping control in the broaching process, process control in the shot blasting process and the like, 0.2mm allowance is reserved for the datum and the related matching surface after finish turning, the side edge of the mortise and the roundness of the disc center are repaired as subsequent references after broaching, the inner side and the outer side of the deformed part of the installation edge are repaired after milling, the final finish machining is carried out on the assembly surface and the assembly hole in place after shot blasting, and the technical problem that the low-pressure turbine disc deforms in the machining process is effectively solved.
Drawings
FIG. 1 is a graph of the margin distribution of the present invention;
FIG. 2 is a turning process diagram of the present invention;
FIG. 3 is a diagram of the turn-milling tooling of the present invention;
FIG. 4 is a drawing of the broaching tool of the present invention;
FIG. 5 is a process diagram of shot blasting according to the present invention;
description of reference numerals: 1-outside spraying gun and 2-inside spraying gun.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1-5, the present invention provides a method for solving the machining process deformation of a low-pressure turbine disk, which includes the following steps:
turning machining step route control is involved, turning machining adjustment allowance distribution is carried out in 4 processes (see figure 1), finish turning process allowance is carried out in 0.5mm, and two processes of 4 cutters are carried out, wherein the first two cutters are machined to remove 0.15mm and 0.3mm each time, and the second two cutters are respectively removed to remove 0.1mm and 0.2 mm; each cutting operation is divided into 5 steps (see figure 2), which are respectively
The inner diameter of the vehicle mounting edge and the disc center,
The inner side of the vehicle cantilever,
The inner side of the car web,
The inner side of the vehicle mounting edge,
Turning the outer contour of the cantilever and the mounting edge; each procedure totals 10 working steps, the route sequence of each 5 working steps is carried out in the opposite direction, and the first knife is carried out
-
The second knife is from
-
(ii) a Deformation control in the turning process is carried out by means of reciprocating type routes and adjustable tool clamping (see figure 3);
clamping control in a broaching process is realized, a quick-change clamp is mounted on a rotary table of a broaching machine, radial coarse positioning is carried out by using a disc center, the end face is positioned at the side edge of a mortise, the angular direction of a turbine disc is positioned by using a diamond pin, then the excircle runout of the mortise is aligned to be not more than 0.01mm, the other surface of the mortise is pressed by using a force more than 500N, and the positioning and pressing surface of the mortise is provided with an avoidance groove to be pressed by a maximum contact surface (see figure 4); the clamping measure is adopted to reduce the deformation of the turbine disc in the broaching process;
the method comprises the following steps of (1) relating to process control in a shot blasting process, wherein different influence degrees of each shot blasting part on part deformation are mainly considered in the shot blasting process, locally adjusting a shot blasting angle and a shot blasting sequence (see figure 5) on the premise of ensuring the shot blasting strength and coverage rate, substituting an oblique angle of 60-75 degrees into a disc center from inside to outside in the shot blasting process, and enabling the outer surface to be vertical to a plane where the disc center is located;
the method comprises the following steps of (1) allowance distribution after finish turning, reserving a little repair amount at an easily deformed part after the finish turning process, reserving 0.1mm at the side edge of a mortise, reserving 0.1mm at a disc center, reserving 0.2mm at each of two sides of an installation edge, and then broaching;
the method comprises the following steps that (1) datum repair after broaching is related, after broaching is finished, certain deformation occurs to two side edge planes of a mortise and the roundness of a disc center, the two side edges and the disc center are trimmed to 0.01 through a grinding method, and the two side edges and the disc center are used as datum planes for subsequent processing;
the repair of the easy-to-deform part after groove milling is carried out, the allowance of the two mounting edges after lace and mounting hole milling is larger, the size and the planeness of the mounting edge part are greatly deformed, the turning repair is carried out about 0.1mm after the working procedure, and the good state of the part before shot blasting is ensured;
the final assembly size precision after shot blasting is guaranteed, after the shot blasting of the part is finished, the matching surfaces of the mounting edges on the two sides are processed by driving or grinding to guarantee the assembly size and the jumping requirement, and then the assembly holes on the two sides are finely bored in place; and the aperture size and the position degree are ensured to meet the matching precision required by the design drawing.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the process carries out finish turning machining through procedures such as turning machining step route control, clamping control in the broaching process, process control in the shot blasting procedure and the like, a 0.2mm allowance is reserved for a reference and a related matching surface after finish turning, the side edge of a repair tongue-and-groove and the roundness of a disc center are used as follow-up references after broaching, the inner side and the outer side of a deformed part of an installation edge are repaired after milling machining is finished, final finish machining is carried out on the assembly surface and an assembly hole in place after shot blasting is finished, and the technical problem that a low-pressure turbine disc deforms in the machining process is effectively solved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (1)
1. A method for solving the deformation of a low-pressure turbine disc in a machining process is characterized by comprising the following steps:
turning process step route control is involved, turning adjustment allowance distribution is carried out in 4 processes, finish turning process allowance is carried out in 0.5mm, and two processes of 4 cutters are carried out, wherein the first two cutters are machined to remove 0.15mm and 0.3mm each time, and the second two cutters are respectively removed to remove 0.1mm and 0.2 mm; each cutting operation is divided into 5 steps
The inner diameter of the vehicle mounting edge and the disc center,
The inner side of the vehicle cantilever,
The inner side of the car web,
The inner side of the vehicle mounting edge,
Turning the outer contour of the cantilever and the mounting edge; each program has 10 working steps and the first knife is selected
-
The second knife is from
-
Sequentially carrying out the steps; deformation control in the turning process is carried out by means of a reciprocating route and an adjustable tool clamping;
clamping control in a broaching process is realized, a quick-change clamp is mounted on a rotary table of a broaching machine, radial coarse positioning is carried out by using a disc center, the end face is positioned at the side edge of a mortise, the angular direction of a turbine disc is positioned by using a diamond pin, then the excircle runout of the mortise is aligned to be not more than 0.01mm, the other surface of the mortise is pressed by using a force more than 500N, and the mortise positioning and pressing surface is provided with an avoidance groove to be pressed by a maximum contact surface;
the method comprises the following steps of (1) relating to process control in a shot blasting process, wherein different influence degrees of each shot blasting part on part deformation are mainly considered in the shot blasting process, and locally adjusting a shot blasting angle and a shot blasting sequence on the premise of ensuring the shot blasting strength and coverage rate, wherein the shot blasting is substituted into an oblique angle of 60-75 degrees from inside to outside and from the inner side to the center of a disk, and the outer side surface is vertical to a plane where the center of the disk is located;
the method comprises the following steps of (1) allowance distribution after finish turning, reserving a little repair amount at an easily deformed part after the finish turning process, reserving 0.1mm at the side edge of a mortise, reserving 0.1mm at a disc center, reserving 0.2mm at each of two sides of an installation edge, and then broaching;
the method comprises the following steps that (1) datum repair after broaching is related, after broaching is finished, certain deformation occurs to two side edge planes of a mortise and the roundness of a disc center, the two side edges and the disc center are trimmed to 0.01 through a grinding method, and the two side edges and the disc center are used as datum planes for subsequent processing;
the repair of the easy-to-deform part after groove milling is carried out, the allowance of the two mounting edges after lace and mounting hole milling is larger, the size and the planeness of the mounting edge part are greatly deformed, the turning repair is carried out about 0.1mm after the working procedure, and the good state of the part before shot blasting is ensured;
the final assembly size precision after shot blasting is guaranteed, after the shot blasting of the part is finished, the matching surfaces of the mounting edges on the two sides are processed by driving or grinding to guarantee the assembly size and the jumping requirement, and then the assembly holes on the two sides are finely bored in place; and the aperture size and the position degree are ensured to meet the matching precision required by the design drawing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011199926.XA CN112276496B (en) | 2020-10-30 | 2020-10-30 | Method for solving deformation of low-pressure turbine disc in machining process |
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| CN202011199926.XA CN112276496B (en) | 2020-10-30 | 2020-10-30 | Method for solving deformation of low-pressure turbine disc in machining process |
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| CN112276496B true CN112276496B (en) | 2022-05-20 |
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| CN110170875B (en) * | 2019-07-11 | 2021-10-29 | 嘉兴恒瑞动力有限公司 | Broaching tool for turbine disc and disc parts |
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