CN110961862B - Method for processing damping ring in air inlet measuring rake - Google Patents
Method for processing damping ring in air inlet measuring rake Download PDFInfo
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- CN110961862B CN110961862B CN201911048531.7A CN201911048531A CN110961862B CN 110961862 B CN110961862 B CN 110961862B CN 201911048531 A CN201911048531 A CN 201911048531A CN 110961862 B CN110961862 B CN 110961862B
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Abstract
The invention discloses a method for processing a damping ring in an air inlet duct measuring rake, relates to the field of aviation, and is used for solving the problems that the damping ring required in the existing measuring rake cannot be produced in batches and the single piece production industry is relatively complex. The method comprises the following steps: detecting a damping ring material to be processed by adopting a flaw detection method, surrounding the damping ring material to be processed on a primary winding tool to obtain a primary winding damping ring, and performing edge and corner blunting on the primary winding damping ring; the shape correction is carried out on the primary winding damping ring on a damping ring shape correction tool, and the primary winding damping ring is fixed on a clamp notch on the damping ring shape correction tool through a damping ring fixing clamp to obtain a shape correction damping ring; and mounting the shape correction damping ring on a thermal treatment tool, and performing thermal treatment on the shape correction damping ring according to the GB/T18983 requirement to obtain the damping ring in the air inlet channel measuring rake.
Description
Technical Field
The invention relates to the technical field of aero-engines, in particular to a method for machining a damping ring in an air inlet duct measuring rake.
Background
In a flight test, temperature and pressure parameters at an outlet of an air inlet channel/an inlet of an engine provide important information for evaluating the performance of the engine, and a measurement rake is used as test auxiliary equipment and is installed at a position to be tested to obtain related test parameters, so that the flow field quality is evaluated through measurement.
Fig. 1 is a schematic view of a measurement rake in the prior art, and as shown in fig. 1, the air intake channel measurement rake 2 is made of an all-metal material and is installed at a designated position in the air intake channel 1, and each rake 2 is connected with each other by a damping ring 3. In fig. 1, 6 damping rings are required in the air inlet channel measuring rake, the damping rings are of spring type structures, generally, the material of the damping rings is formed by machining silicon-manganese spring steel-65 Si2MnWA, the silicon-manganese spring steel has high strength and good elasticity, but the damping rings made of the silicon-manganese spring steel are easy to decarbonize.
In the prior art, damping rings required in a measuring rake are all produced in a single piece, and the produced damping rings need to be deformed in the axial direction, so that the problems that the mass production cannot be realized and the single piece production process is complex exist in the existing production mode of the damping rings required in the measuring rake.
Disclosure of Invention
The embodiment of the invention provides a method for processing a damping ring in an air inlet measuring rake, which is used for solving the problems that the damping ring required in the existing measuring rake cannot be produced in batches and the single-piece production industry is relatively complicated.
The embodiment of the invention provides a method for processing a damping ring in an air inlet measuring rake, which comprises the following steps:
detecting a damping ring material to be processed by adopting a flaw detection method, wherein the damping ring material to be processed is a silicon-manganese spring steel wire, and the damping ring material to be processed is determined according to the size of the damping ring to be processed;
encircling the damping ring material to be processed on an initial winding tool to obtain an initial winding damping ring, and performing edge and corner blunting on the initial winding damping ring;
the shape correction is carried out on the primary winding damping ring on a damping ring shape correction tool, and the primary winding damping ring is fixed on a clamp notch on the damping ring shape correction tool through a damping ring fixing clamp to obtain a shape correction damping ring;
and mounting the shape correction damping ring on a thermal treatment tool, and performing thermal treatment on the shape correction damping ring according to the GB/T18983 requirement to obtain the damping ring in the air inlet channel measuring rake.
Preferably, the primary winding tool is a stepped cylinder, the stepped cylinder comprises a first cylinder with a diameter smaller than that of a second cylinder, and a circular hole is formed in the side wall of the first cylinder;
encircling the damping ring material to be processed on a primary winding tool to obtain a primary winding damping ring, and specifically comprising the following steps:
and arranging one end of the damping ring material to be processed in the round hole, sequentially surrounding the damping ring material to be processed on the first cylinder, and fixing the damping ring material to be processed, which is surrounded on the first cylinder, for at least 1 h.
Preferably, at least 4 clamp notches are symmetrically arranged on the damping ring sizing tool;
the clamp notch on the damping ring shape correcting tool is fixed by a damping ring fixing clamp, and the initial winding damping ring is fixed by a damping ring fixing clamp to obtain a shape correcting damping ring, and the shape correcting tool specifically comprises:
fixing the damping ring fixing clamp on the initially-wound damping ring through at least 2 bolts at the position of the clamp gap, wherein at least 4 grooves are formed in the opposite surfaces of two clamping pieces of the damping ring fixing clamp, and the curvature of each groove is consistent with the surface curvature of the damping ring material to be processed;
and grinding two ends of the primary winding damping ring on the damping ring shape correcting tool to enable the roughness of the two ends of the primary winding damping ring to be not more than 1.6, and arranging the primary winding damping ring on the damping ring shape correcting tool for fixing for at least 1 h.
Preferably, before obtaining the damping ring in the air intake duct measurement rake, the method further includes:
and carrying out sand blasting treatment and surface treatment on the shape correction damping ring after heat treatment to obtain the damping ring in the air inlet channel measuring rake.
The embodiment of the invention provides a method for processing a damping ring in an air inlet measuring rake, which comprises the following steps: detecting a damping ring material to be processed by adopting a flaw detection method, wherein the damping ring material to be processed is a silicon-manganese spring steel wire, and the damping ring material to be processed is determined according to the size of the damping ring to be processed; encircling the damping ring material to be processed on an initial winding tool to obtain an initial winding damping ring, and performing edge and corner blunting on the initial winding damping ring; the shape correction is carried out on the primary winding damping ring on a damping ring shape correction tool, and the primary winding damping ring is fixed on a clamp notch on the damping ring shape correction tool through a damping ring fixing clamp to obtain a shape correction damping ring; and mounting the shape correction damping ring on a thermal treatment tool, and performing thermal treatment on the shape correction damping ring according to the GB/T18983 requirement to obtain the damping ring in the air inlet channel measuring rake. The damping ring processing method can aim at the single damping ring, and reduces the manufacturing cost of the product on the premise of ensuring the reliability of the single damping ring.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a prior art measurement rake installation;
fig. 2 is a schematic flow chart of a method for processing a damping ring in an air intake duct measurement rake according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a damping ring structure according to an embodiment of the present invention;
FIG. 4 is an enlarged cross-sectional view of the damping ring A-A of FIG. 3 according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a primary winding tooling provided in an embodiment of the present invention;
FIG. 6 is a schematic structural view of a damping ring sizing tool according to an embodiment of the present invention;
FIG. 7 is a schematic view of a damping ring retaining clip according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a heat treatment tool according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 exemplarily shows a method for processing a damping ring in an air intake duct measurement rake according to an embodiment of the present invention, as shown in fig. 2, the method mainly includes the following steps:
102, encircling the damping ring material to be processed on a primary winding tool to obtain a primary winding damping ring, and performing edge chamfering on the primary winding damping ring;
103, correcting the shape of the primary winding damping ring on a damping ring shape correcting tool, and fixing the primary winding damping ring on a clamp notch on the damping ring shape correcting tool through a damping ring fixing clamp to obtain a shape correcting damping ring;
and 104, mounting the shape correction damping ring on a thermal treatment tool, and performing thermal treatment on the shape correction damping ring according to the GB/T18983 requirement to obtain the damping ring in the air inlet channel measuring rake.
Before step 101, the material for processing the damping ring needs to be detected by a flaw detection method, and the purpose of the flaw detection is to avoid the problem that the surface of the steel wire for detecting the damping ring is scratched or damaged. In practical applications, the flaw detection method may include any one of X-ray flaw detection, ultrasonic flaw detection, magnetic particle flaw detection, penetrant flaw detection (dye flaw detection), eddy current flaw detection, gamma ray flaw detection, and fluorescence flaw detection.
In the embodiment of the invention, the damping ring is made of a spring structure, the material can be selected from silicon-manganese spring steel-65 Si2MnWA, and the reason for selecting the silicon-manganese spring steel-65 Si2MnWA is that the 65Si2MnWA has the characteristics of high strength, good elasticity and the like.
In step 101, after the material for processing the damping ring is selected by the flaw detection method, the material can be prepared according to the drawing requirements. In practical application, since the damping ring is applied to the measuring rake, the actual size of the damping ring required by different measuring rakes is different, and therefore, when the damping ring is machined, the specific size of the material needs to be determined according to specific drawing requirements. For example, when the radius of the damping ring to be processed is 348mm and 4 turns are required, the effective length of the damping ring material to be processed is 4371mm according to the data, and furthermore, because a stub bar is required during the preparation of the damping ring, the length of the stub bar is 655mm, and the actual length of the damping ring material to be processed can be determined by adding the two lengths determined above.
Fig. 3 is a schematic view of a damping ring structure provided in an embodiment of the present invention, and fig. 4 is an enlarged sectional view of a-a of the damping ring shown in fig. 3 provided in an embodiment of the present invention, and as shown in fig. 3 and fig. 4, the damping ring in the measuring rake is a circular structure, and the circular structure simultaneously includes at least 4 layers, that is, the damping ring material to be processed needs to be wound on the processing tool for at least 4 times.
Fig. 5 is a schematic structural view of a primary winding tool according to an embodiment of the present invention, and as shown in fig. 5, the primary winding tool according to the embodiment of the present invention is a stepped cylinder, the stepped cylinder includes a first cylinder and a second cylinder, a bottom surface of the first cylinder is fixed on a top surface of the second cylinder, and a diameter of the first cylinder is smaller than a diameter of the second cylinder. In practical application, a circular hole is arranged on the side wall of the first cylinder, and the diameter of the circular hole is matched with or larger than that of the damping ring material to be processed.
In step 102, before the damping ring material to be processed is wound on the primary winding tool to prepare the primary winding damping ring, the head end of the damping ring material to be processed needs to be inserted into the circular hole on the side wall of the first cylinder, and by the method, the head end of the damping ring material to be processed can be fixed, so that the problem that the four layers of the damping ring material to be processed are inconsistent in circumference due to the fact that the damping ring material to be processed moves along the primary winding tool when being wound around the primary winding tool can be avoided.
Further, the head end of the damping ring material to be processed is fixed behind the circular hole, the damping ring material to be processed can surround the side wall of the first cylinder, and according to the requirement of a drawing, the damping ring material to be processed surrounds the side wall of the first cylinder for 4 circles, and the tail end of the damping ring material to be processed is cut on the side wall of the first circular table, so that a primary winding damping ring is obtained. It should be noted that the head end and the tail end included in the primary winding damping ring do not meet on the side wall of the first cylinder. For example, when the first cylinder of the primary winding type tooling is located at the upper end of the second cylinder, and the primary winding damping ring starts to surround from top to bottom along the first cylinder, the head end and the tail end of the primary winding damping ring are respectively arranged at the upper side and the lower side of the primary winding damping ring, but the projection of the head end along the vertical direction of the primary winding damping ring is in contact with the tail end but does not intersect, that is, when the primary winding damping ring has 4 turns, no matter the transverse cutting is performed from the point of the primary winding damping ring, the cross section comprises 4 circular cross sections. A specific cross section can be seen in fig. 4.
It should be noted that, in practical applications, since the damping ring material to be processed is of a spring-like structure, in order to ensure that the primary winding damping ring obtained after winding does not deform, the damping ring material to be processed wound around the first cylinder is preferably fixed on the first cylinder for at least 1 h.
After the primary winding damping ring is obtained, the leading end and the tail end included in the primary winding damping ring are required to be chamfered so that the leading end and the tail end are in a C1 state.
Fig. 6 is a schematic structural view of a damping ring sizing tool according to an embodiment of the present invention, fig. 7 is a schematic structural view of a damping ring fixing clamp according to an embodiment of the present invention, and as shown in fig. 6, at least 4 clamp notches are symmetrically arranged at a top end of the damping ring sizing tool according to an embodiment of the present invention, and the clamp notches are mainly used for fixing a winding-removing damping ring around the damping ring sizing tool through the damping ring fixing clamp.
As shown in fig. 7, fix damping ring fixation clamp on just winding damping ring through 2 at least bolts in anchor clamps breach position, in practical application, because just winding damping ring is including 4 rings at least, in order to fix just winding damping ring, preferably, all be provided with 4 at least recesses on the opposite face of two clamping pieces that damping ring fixation clamp includes, the camber of 4 recesses and the surface curvature phase-match of waiting to process damping ring material, through above-mentioned setting, can fix just winding damping ring through damping ring is fixed promptly. It should be noted that each damping ring material to be processed is provided with a matched damping ring fixing clamp, and in the embodiment of the invention, the size of the groove included in the damping ring fixing clamp is not limited.
In step 103, when the obtained primary winding damping ring is placed on a damping ring shape correction tool for correction, the head end and the tail end of the primary winding damping ring need to be ground flat, and the roughness of the ground flat is required to be not more than 1.6. Further, when the damping ring is initially wound and placed on a damping ring shape correction tool for correction, at least 1h of fixation is needed. And (5) processing the initially wound damping ring by a damping ring sizing tool to obtain a sizing damping ring.
Fig. 8 is a schematic structural view of a heat treatment tool according to an embodiment of the present invention, and as shown in fig. 8, fig. 4 is a damping ring, fig. 5 is a heat treatment tool, and fig. 6 is a damping ring fixing clip. The heat treatment tool provided by the embodiment of the invention at least comprises 8 fixed points, and the 8 fixed points all have the same radius, namely if the 8 fixed points are connected by curves, a circle can be formed. Further, as shown in fig. 8, the adjacent two fixing points are connected by a support ring having a curvature. Further, the heat treatment tool comprises a circular point, 8 rays extend out of the circular point, or 4 line segments form 8 rays through the circular point, the end points of the 8 rays are 8 fixed points, and in the embodiment of the invention, 8 fixed points divide a circle formed by the 8 fixed points into 8 parts on average through the 8 rays. In practical application, since the heat treatment tool is used for fixing the damping ring, in order to enable the heat treatment tool to have stability, preferably, two adjacent rays are connected through a line segment, and the line segment for connecting and the parts of the two rays can form a triangle.
In the embodiment of the present invention, the calibration damping ring is disposed on the thermal processing tool, and since the calibration damping ring includes the fixing clip, the calibration damping ring disposed on the thermal processing tool also includes the fixing clip, it should be noted that when the calibration damping ring is disposed on the thermal processing tool, the fixing clip should be prevented from being disposed on 8 fixing points.
Further, after the shape correction damping ring is arranged on the heat treatment tool, the heat treatment tool can be subjected to heat treatment on the whole, in the embodiment of the invention, the heat treatment process can be performed according to GB/T18983 by adopting an oil quenching and tempering mode, and the heat treatment process can be specifically referred to the heat treatment process of the damping ring shown in FIG. 1.
TABLE 1 damping Ring Heat treatment Process
In the embodiment of the present invention, the damping ring material to be processed is 65Si2MnWA, which has high strength and good elasticity, but has a problem of easy decarburization, and both the vibration resistance and the impact toughness of the damping ring material after decarburization are greatly reduced, and thus the use effect is not satisfied. In order to avoid the above problems, it is preferable to perform a "carbon burying" treatment during the heat treatment process to ensure that the damping ring does not generate decarburization during the heat treatment process.
In practical application, the carbon burying treatment is to put easily-oxidizable substances (usually containing carbon, such as graphite products and the like) into a sagger, and fill the sagger with carbon particles to seal the sagger, so that the carbon particles react with oxygen in the air at high temperature to protect the carbon in the products from being oxidized.
Furthermore, the shape correction damping ring after heat treatment needs sand blowing treatment and surface treatment, and the damping ring in the air inlet channel measuring rake can be obtained after the process.
In practical application, the sand blasting treatment is sand blasting treatment, and the method adopts compressed air as power to form high-speed jet beams, and sprays high-speed jet materials (such as copper ore sand, quartz sand, iron sand, sea sand, carborundum and the like) to the surface of a workpiece to be treated at high speed to change the appearance of the surface of the workpiece.
Further, the surface treatment may also be referred to as bluing treatment, which mainly comprises the steps of:
firstly, preparing, washing oil stain with gasoline, and hanging;
secondly, chemical degreasing, wherein the temperature of the process is 70-80 ℃, and the time is 20-30 min;
thirdly, hot water washing is carried out, the temperature of the process is 70-90 ℃, and the time is 10-15 s;
fourthly, cold flow water washing;
adopting HCL with the concentration of 10-30% to carry out corrosion, wherein the corrosion time is 1-15 s;
sixthly, cold flow water washing;
seventhly, bluing at the temperature of 140-145 ℃ for 35-60 min;
eighthly, washing with hot water, wherein the temperature of the process is 50-60 ℃;
ninthly, drying;
removing hydrogen at the front part, wherein the temperature of an oven is 180-230 ℃, and the time is 2-3 h;
11, oil immersion, wherein the temperature of the process is between 90 and 100 ℃, and the time is between 10 and 15 min.
In the embodiment of the invention, the shape correction damping ring processed by the process also needs to be subjected to the last detection process, and only the shape correction damping ring passing the detection process can be the damping ring which is finally confirmed and can be applied to the air inlet duct measuring rake.
It should be noted that the detection process specifically includes the following steps:
and 4, no residual alkali or salt marks exist on the surface of the part.
In summary, an embodiment of the present invention provides a method for processing a damping ring in an air intake duct measurement rake, including: detecting a damping ring material to be processed by adopting a flaw detection method, wherein the damping ring material to be processed is a silicon-manganese spring steel wire, and the damping ring material to be processed is determined according to the size of the damping ring to be processed; encircling the damping ring material to be processed on an initial winding tool to obtain an initial winding damping ring, and performing edge and corner blunting on the initial winding damping ring; the shape correction is carried out on the primary winding damping ring on a damping ring shape correction tool, and the primary winding damping ring is fixed on a clamp notch on the damping ring shape correction tool through a damping ring fixing clamp to obtain a shape correction damping ring; and mounting the shape correction damping ring on a thermal treatment tool, and performing thermal treatment on the shape correction damping ring according to the GB/T18983 requirement to obtain the damping ring in the air inlet channel measuring rake. The damping ring processing method can aim at the single damping ring, and reduces the manufacturing cost of the product on the premise of ensuring the reliability of the single damping ring.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. The machining method of the damping ring in the air inlet channel measuring rake is characterized by comprising the following steps of:
detecting a damping ring material to be processed by adopting a flaw detection method, wherein the damping ring material to be processed is a silicon-manganese spring steel wire, and the damping ring material to be processed is determined according to the size of the damping ring to be processed;
encircling the damping ring material to be processed on an initial winding tool to obtain an initial winding damping ring, and performing edge and corner blunting on the initial winding damping ring;
the shape correction is carried out on the primary winding damping ring on a damping ring shape correction tool, and the primary winding damping ring is fixed on a clamp notch on the damping ring shape correction tool through a damping ring fixing clamp to obtain a shape correction damping ring;
and mounting the shape correction damping ring on a thermal treatment tool, and performing thermal treatment on the shape correction damping ring according to the GB/T18983 requirement to obtain the damping ring in the air inlet channel measuring rake.
2. The method for processing the damping ring in the air inlet duct measuring rake as recited in claim 1, wherein the primary winding tool is a stepped cylinder, the stepped cylinder comprises a first cylinder with a diameter smaller than that of a second cylinder, and a circular hole is formed in a side wall of the first cylinder;
encircling the damping ring material to be processed on a primary winding tool to obtain a primary winding damping ring, and specifically comprising the following steps:
and arranging one end of the damping ring material to be processed in the round hole, sequentially surrounding the damping ring material to be processed on the first cylinder, and fixing the damping ring material to be processed, which is surrounded on the first cylinder, for at least 1 h.
3. The method for machining the damping ring in the air inlet duct measuring rake according to claim 1, wherein at least 4 clamp notches are symmetrically formed in the damping ring sizing tool;
the clamp notch on the damping ring shape correcting tool is fixed by a damping ring fixing clamp, and the initial winding damping ring is fixed by a damping ring fixing clamp to obtain a shape correcting damping ring, and the shape correcting tool specifically comprises:
fixing the damping ring fixing clamp on the initially-wound damping ring through at least 2 bolts at the position of the clamp gap, wherein at least 4 grooves are formed in the opposite surfaces of two clamping pieces of the damping ring fixing clamp, and the curvature of each groove is consistent with the surface curvature of the damping ring material to be processed;
and grinding two ends of the primary winding damping ring on the damping ring shape correcting tool to enable the roughness of the two ends of the primary winding damping ring to be not more than 1.6, and arranging the primary winding damping ring on the damping ring shape correcting tool for fixing for at least 1 h.
4. The method for processing the damping ring in the air intake duct measuring rake according to claim 1,
before obtaining the damping ring in the air inlet channel measurement rake, the method further comprises the following steps:
and carrying out sand blasting treatment and surface treatment on the shape correction damping ring after heat treatment to obtain the damping ring in the air inlet channel measuring rake.
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| CN104848904B (en) * | 2015-06-05 | 2018-08-07 | 中国航天空气动力技术研究院 | Inlet duct flow system for measuring quantity |
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