Machining process of high-precision titanium alloy support arm of flight equipment and high-precision titanium alloy support arm

Abstract

The invention relates to the technical field of flight equipment part machining, and discloses a machining process of a high-precision titanium alloy supporting arm of flight equipment and the high-precision titanium alloy supporting arm. (2) if the verification is passed, the incoming materials are preliminarily processed, a main body structure is obtained, the main body structure comprises a plurality of sets of lug structures, and each set of lug structure comprises a plurality of lugs; (3) the main body structure serves as a fixed datum, rough punching operation is conducted on each lug piece structure through a first cutter, and rough machining holes are obtained; 4) performing accurate positioning operation on the main body structure based on the rough machining hole by taking the rough machining hole as an accurate positioning reference; the method comprises the steps of (1) carrying out first precise punching operation on each lug through a first cutter to obtain a first precise punching hole, (2) carrying out second precise punching operation on each lug after first punching through a third cutter to obtain a high-precision hole, and ensuring the stability, the coaxiality and the machining precision requirements, and the ratio of the overall height of the multiple sets of lug structures to the diameter of the high-precision hole is larger than 10.

Description

Technical Field

[0001] The present invention relates to the technical field of flight equipment parts processing, and in particular to a processing technology of a high-precision titanium alloy support arm of a flight equipment and the high-precision titanium alloy support arm. Background Art

[0002] In the existing parts processing technology, a variety of processing technologies are required, among which hole processing by tool is one of the conventional processes. In the existing hole processing technology, short tool processing is mainly used, that is, the processing of the hole on the part has more ample space, allowing the tool to be processed with a shorter length, thereby ensuring the strength and processing accuracy of the tool.

[0003] In the field of aircraft parts processing, the processing accuracy requirements are very high, and the processing space of parts is relatively small, so conventional tools cannot be used for hole processing. Generally speaking, when the length-to-diameter ratio of the tool exceeds 10 times, the accuracy of the conventional processing technology will deviate greatly and the accuracy will be greatly reduced. Since the parts of aviation equipment are often formed in one piece, there are multiple holes that need to be processed at one time. The length and diameter of the tool required for processing are far more than 10 times, so it cannot meet the processing accuracy requirements of aircraft parts.

[0004] On the other hand, since the centers of all holes are required to be coaxial, the processing linearity requirement is very high. Therefore, in order to pass the tool through all holes for processing at one time, the tool length needs to be further lengthened, resulting in a further increase in its length-to-diameter ratio, which increases the processing difficulty. Conventional processing technology cannot meet the processing requirements. Summary of the invention

[0005] 1. Technical issues

[0006] The purpose of the present invention is to provide a processing technology and a high-precision titanium alloy support arm for flight equipment, which can meet the one-time through-processing stability by processing holes three times and using the tool handle to guide the holes of different layers each time, thereby ensuring the coaxiality and processing accuracy size requirements.

[0007] (II) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A processing technology for a high-precision titanium alloy support arm of a flight device comprises the following steps:

[0010] 1) Verify the size of the incoming material; 2) If the size verification is passed, perform preliminary processing on the incoming material to obtain a main structure, wherein the main structure includes multiple groups of ear structures, and each group of ear structures includes multiple ear pieces; 3) Take the main structure as a fixed reference, perform a rough punching operation on each group of ear structures by a first tool, and obtain a rough-machined hole; 4) Take the rough-machined hole as a precise positioning reference, and perform a precise positioning operation on the main structure based on the rough-machined hole; 5) Perform a one-time first fine punching operation on each ear piece by a second tool to obtain a first fine-machined hole, and the linearity deviation of the first fine-machined hole is less than 0.025mm; 6) Perform a one-time second fine punching operation on the ear piece after the first punching by a third tool to obtain a high-precision hole, and the diameter deviation of the high-precision hole is less than 0.02mm, and the ratio between the overall height of the multiple groups of ear structures and the diameter of the high-precision hole is greater than 10.

[0011] Preferably, step 1) specifically includes: determining the target size of the high-precision titanium alloy support arm and obtaining a preset machining allowance; determining a qualified incoming material size based on the target size and the preset machining allowance; performing a three-dimensional projection operation on the incoming material based on the qualified incoming material size, and determining whether the three-dimensional projection is within the physical range of the incoming material; if so, generating a verification result indicating that the size verification passed; otherwise, generating a verification result indicating that the incoming material failed.

[0012] Preferably, the processing technology is applied to a machine tool, a stroke pen is provided on the machine tool, the stroke pen is elastically connected to the machine tool in a vertical direction, a distance sensor is provided on the top of the stroke pen, for collecting the real-time distance between the stroke pen and the machine tool, and step 1) also includes: after determining the size of the qualified incoming material, determining a qualified three-dimensional contour based on the qualified incoming material size, the qualified three-dimensional contour including three-dimensional depth information; controlling the machine tool to fit the stroke pen to the surface of the incoming material; controlling the machine tool to drive the stroke pen to perform a corresponding three-dimensional stroke operation according to the qualified three-dimensional contour; judging whether the real-time distance is consistent with the three-dimensional depth information; if so, generating a verification result of passing the size verification; otherwise, generating a verification result of unqualified incoming material.

[0013] Preferably, the processing technology also includes: obtaining the structural spacing between each group of ear structures, the ear spacing between each ear, and the thickness of each ear; configuring the second tool and the third tool based on the structural spacing, the ear spacing and the thickness, the second tool is a milling cutter, and the third tool is a reamer.

[0014] Preferably, the second tool comprises a first guide chamfer, a first blade and a first shank which are arranged in sequence from the front end to the rear end; the length of the first blade is greater than the thickness and less than the sum of the ear piece spacing and the thickness; the first shank is a smooth-surfaced cylinder, the diameters of the first blade and the first shank are equal, and the diameter of the first blade is greater than the diameter of the rough-machined hole and less than the diameter of the high-precision hole; the third tool comprises a second guide chamfer, a guide shaft, a second blade and a second shank which are arranged in sequence from the front end to the rear end; the guide shaft and the second shank are smooth-surfaced cylinders, the diameter of the guide shaft is equal to the diameter of the first blade, the second blade, the second shank and the high-precision hole are equal in diameter, and the length of the guide shaft is equal to the length of the first blade; the length of the second blade is less than the spacing between adjacent groups of ear piece structures, and greater than the sum of the ear piece spacing and twice the thickness.

[0015] Preferably, the second blade includes multiple blades, and a chip breaker groove is arranged in the middle position of each blade, and the chip breaker groove includes a first chip guide groove arranged near the front end of the blade and a second chip guide groove arranged away from the front end of the blade, the depth of the first chip guide groove is greater than the depth of the second chip guide groove, the length of the chip breaker groove is greater than half of the length of the blade and less than 7 / 8 of the length of the blade, and the length of the first chip guide groove is 1 / 10 to 1 / 20 of the length of the second chip guide groove.

[0016] Preferably, during the rough drilling operation in step 3), half of the rough-machined holes are first machined after the main structure is fixed, and the other half of the rough-machined holes are then machined after the main structure is rotated 180° and positioned, and finally the machined main structure is rotated 180° to restore to its initial position.

[0017] Preferably, the first tool, the second tool and the third tool are connected in sequence from front to back to form an integrated tool, and the integrated tool includes a rough hole blade, the first guide chamfer, the first blade, the guide circular shaft, the second guide chamfer, the second blade and the second tool handle connected in sequence from front to back; the length of the rough hole blade is greater than half of the overall height of the multiple groups of ear piece structures, and the diameter of the rough hole blade is equal to the diameter of the rough machining hole.

[0018] Preferably, step 4) specifically includes: placing the main structure on a positioning tool, the positioning tool comprising a plurality of positioning holes, the diameter of the positioning holes being equal to the diameter of the high-precision holes, the position of each positioning hole being arranged in one-to-one correspondence with the position of the high-precision holes on the ear piece, and the distance deviation between the positioning holes being less than 0.02 mm; aligning the rough-machined holes with the positioning holes, and inserting positioning pins through the rough-machined holes and the positioning holes; adjusting the position of the main structure according to the preset position requirements; fixing the main structure by the fixing part on the positioning tool, and removing the positioning pins to complete the precise positioning operation.

[0019] On the other hand, an embodiment of the present application provides a high-precision titanium alloy support arm, which is manufactured according to the processing technology of a high-precision titanium alloy support arm for a flight device described in an embodiment of the present application.

[0020] (III) Beneficial effects

[0021] After the main structure and ear structure are initially formed through processing, the processing consistency of high-precision holes is achieved through three hole processing processes. First, the first tool is used to drill holes on the ear structure to form rough-machined holes, and the rough-machined holes are used as positioning references to position the entire main structure on the positioning tooling, thereby ensuring the position accuracy of the high-precision holes during processing, avoiding deviations in the processing positions of the high-precision holes due to processing deviations of the main structure, and ensuring processing accuracy.

[0022] Secondly, when the second tool is used to gradually penetrate the rough-machined hole for processing, the tool holder of the second tool is used to cooperate with the first fine-machined hole that has been processed to realize the movement and guidance of the second tool during the downward penetration process, thereby ensuring that the initial precision hole currently being processed has a high coaxiality with the initial precision hole that has been completed; finally, the third tool is used to gradually penetrate the process to form a high-precision hole that meets the size requirements. At the same time, during the downward movement of the third tool, the tool holder cooperates with the high-precision hole that has been processed to realize the movement and guidance of the third tool, thereby ensuring that the high-precision hole currently being processed remains coaxial with the high-precision hole that has been completed, and finally achieving a high-precision hole that can be penetrated at one time and meets the high-precision processing requirements when the length and diameter ratio of the tool is greater than 10 times. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a high-precision titanium alloy support arm;

[0024] Figure 2 The process flow diagram of an embodiment of the present invention is shown in FIG.

[0025] Figure 3 It is a structural schematic diagram of a positioning tool used in an embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of a second tool used in an embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of a third tool used in an embodiment of the present invention;

[0028] Figure 6 is a schematic diagram of the structure of the second blade in an embodiment of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of a composite tool used in an embodiment of the present invention;

[0030] Description of Reference Numerals

[0031] Main structure 100, ear structure 101, high-precision hole 102, positioning tool 200, fixing part 201, positioning hole 202, positioning pin 203, second tool 300, first blade 301, first tool holder 302, first guide chamfer 303, third tool 400, guide circular shaft 401, second blade 402, blade part 4021, chip breaker groove 4022, first chip guide groove 40221, second chip guide groove 40222, second tool holder 403, second guide chamfer 404, coarse hole blade 600. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In an embodiment of the present invention, a processing technology for a high-precision titanium alloy support arm of a flight device is proposed, wherein the high-precision titanium alloy support arm is as follows: Figure 1 As shown, it includes a main structure 100 and a plurality of ear structures 101 arranged in the longitudinal direction on the main structure 100, and two rows of high-precision holes 102 are processed on the ear structures 101. The aperture deviation of the high-precision holes 102 on different ear structures 101 is required to be 0.02mm, and the coaxiality deviation is required to be ±0.025mm. The existing processing tools and processing methods cannot meet the requirement of coaxial processing of high-precision holes 102 through all ear structures 101 at one time. Therefore, this embodiment proposes a new processing technology to ensure the processing consistency and dimensional accuracy requirements of high-precision holes 102. The specific processing equipment is a machine tool, such as a machining center, etc. The relevant machine tool adjustment control power transmission are all conventional technologies. This embodiment mainly optimizes the process methods involved in the positioning of the main structure 100 and the processing of high-precision holes 102.

[0034] Specifically, Figure 2 As shown, the following steps are included:

[0035] 1) Verify the dimensions of incoming materials.

[0036] In the prior art, verifying incoming materials is a routine step. Currently, technicians mainly use manual verification. Specifically, technicians analyze the drawings of the high-precision titanium alloy arm in advance to determine the verification line segments, and then use a marker to draw lines on the incoming materials according to the verification line segments. If the lines exceed the range of the incoming materials at some point, the direction is adjusted. If the lines still exceed the range, it can be determined that the size of the incoming materials does not meet the processing requirements and needs to be replaced. If all verification line segments are within the range of the incoming materials, it is determined that the incoming materials meet the processing requirements.

[0037] However, in actual application, this method is very inefficient, resulting in high labor costs in the verification process and failing to meet actual business needs. At the same time, the manual verification method has subjective bias and cannot meet the high-precision requirements of aviation equipment.

[0038] In order to solve this technical problem, in an embodiment of the present application, step 1) specifically includes: determining the target size of the high-precision titanium alloy arm and obtaining a preset machining allowance; determining a qualified incoming material size based on the target size and the preset machining allowance; performing a three-dimensional projection operation on the incoming material based on the qualified incoming material size, and determining whether the three-dimensional projection is within the physical range of the incoming material; if so, generating a verification result of passed size verification; otherwise, generating a verification result of unqualified incoming material.

[0039] In a possible implementation, the host computer automatically obtains the target size of the high-precision titanium alloy support arm and the preset machining allowance, and then expands the outline of the target size according to the preset machining allowance to obtain the qualified incoming material size. It should be noted that since the processing of the high-precision titanium alloy support arm belongs to three-dimensional processing, the qualified incoming material size belongs to three-dimensional size data. At this time, a three-dimensional projection operation is performed on the incoming material based on the qualified incoming material size, and it is determined whether the three-dimensional projection is within the physical range of the incoming material. If part of the three-dimensional projection is outside the incoming material, the projection position or projection angle is immediately adjusted manually or automatically. If the final three-dimensional projection is within the physical range of the incoming material, it is determined that the incoming material size verification is qualified, otherwise a verification result of unqualified incoming material is generated.

[0040] In actual application, the above method requires the installation of additional projection equipment or even image acquisition equipment on the machine tool, which on the one hand occupies the processing space of the machine tool; on the other hand, it greatly increases the operating costs of the enterprise. In actual application, technicians found that it is only necessary to verify the outer contour of the incoming material, and the machine tool itself can perform the corresponding routing operations according to the control program, so that the machine tool itself can be used to perform low-cost verification work.

[0041] In an embodiment of the present invention, a stroke pen is provided on the machine tool, and the stroke pen is elastically connected to the machine tool in a vertical direction. A distance sensor is provided on the top of the stroke pen for collecting the real-time distance between the stroke pen and the machine tool. Step 1) also includes: after determining the size of the qualified incoming material, determining a qualified three-dimensional contour based on the qualified incoming material size, and the qualified three-dimensional contour includes three-dimensional depth information; controlling the machine tool to fit the stroke pen to the surface of the incoming material; controlling the machine tool to drive the stroke pen to perform a corresponding three-dimensional stroke operation according to the qualified three-dimensional contour; judging whether the real-time distance is consistent with the three-dimensional depth information; if so, generating a verification result of passing the size verification; otherwise, generating a verification result of unqualified incoming material.

[0042] In a possible implementation, by elastically installing a stroke pen on a machine tool, such as a mechanical arm of a machine tool, during verification, the tip of the stroke pen is attached to the surface of the incoming material, for example, the mechanical arm is controlled to press down 1-2 cm so that the pen tip is tightly attached to the surface of the incoming material, and then the contour line to be verified is determined according to the size of the qualified incoming material, and the mechanical arm is controlled to perform the corresponding three-dimensional stroke operation according to the contour line. During the execution process, if the contour of the incoming material meets the processing requirements, the stroke pen should draw line segments on the surface of the incoming material throughout the process. During this process, the distance between the stroke pen and the machine tool should meet the corresponding three-dimensional depth information. Otherwise, once the stroke pen exceeds the physical range of the incoming material, it will pop down, thereby causing an abnormal increase in the distance between the stroke pen and the machine tool. Based on this, it can be determined that the incoming material does not meet the processing requirements. At this time, the machine tool can be controlled to stop, which is convenient for technicians to perform subsequent operations or processing.

[0043] In the embodiment of the present invention, by making minor improvements to the machine tool and utilizing the routing function of the machine tool itself in conjunction with a low-cost tracing device, it is possible to quickly and accurately determine whether the incoming materials meet the processing requirements, thereby greatly improving the efficiency of incoming material verification, reducing the enterprise's verification costs, and meeting actual needs.

[0044] 2) If the size verification is passed, the incoming materials are preliminarily processed to obtain the main structure.

[0045] For example, in one embodiment, it is determined that the incoming material meets the processing requirements, so the subsequent processing flow is carried out. In the embodiment of the present application, the blank is processed by a machine tool to form a main structure 100 and an ear structure 101, and the size meets the processing requirements. For example, in the embodiment of the present application, three groups of ear structures 101 are processed on the main structure 100, and each group of ear structures 101 includes two ear pieces. In the embodiment of the present application, the processing accuracy requirements for the main structure 100 are not high, so conventional processing methods can be used for processing. In the process of high-precision hole processing of the ear piece, since the high-precision hole 102 has very high requirements, specifically, the position accuracy, linearity deviation and diameter deviation of the high-precision hole 102 are required to be within 10μm level, for example, the diameter deviation is required to be less than 0.02mm, and the linearity deviation is within 0.025mm. At the same time, the diameter of the high-precision hole 102 is more than 10 times the height ratio of the overall height of the multiple groups of ear structures, so traditional tools and processing methods cannot meet the actual requirements.

[0046] Based on this, in the embodiment of the present application, on the one hand, the preliminary position of the hole on the ear piece is first determined on the main structure 100; on the other hand, precise drilling operations are performed with the rough-machined hole as a precise positioning reference, thereby effectively ensuring the machining accuracy of all holes.

[0047] 3) With the main structure 100 as a fixed reference, after the main structure 100 is fixed, a rough-machined hole is formed on the ear structure 101 by a first tool through rough drilling. For example, the diameter of the rough-machined hole is 13 mm, and the diameter of the high-precision hole 102 is 15 mm. When performing the initial hole processing, the first tool adopts a conventional drilling tool. Specifically, when drilling, it can be seen from the above diameter that the accuracy of the rough-machined hole is not high and there is a certain processing allowance. At the same time, due to the length limitation of the first tool, drilling can be performed from both sides of the main structure 100 to reduce the processing difficulty and improve the processing efficiency.

[0048] In a possible implementation, after the main structure 100 is positioned, half of the rough-machined holes are first processed, and then the main structure 100 is rotated 180°. After positioning, the other half of the rough-machined holes are processed to achieve through-processing of the rough-machined holes on all the ear pieces. Finally, the processed main structure is rotated 180° to restore to its original position.

[0049] 4) The rough-machined hole is used as a precise positioning reference and the main structure 100 is fixed and clamped. Since the rough-machined hole has been preliminarily penetrated, although the coaxiality and diameter deviation do not meet the requirements, the position of the rough-machined hole meets the hole position requirements. Therefore, it can be used as a precise positioning reference when processing the high-precision hole 102, and the main structure 100 is positioned by the positioning tool 200. Specifically, Figure 3As shown, the positioning tool 200 has a fixing portion 201 for fixing the main structure 100, and a positioning hole 202 located on one side of the fixing portion 201. The spacing of the positioning holes 202 is the same as the spacing of the high-precision holes 102, and the distance deviation between the positioning holes 202 is less than 0.02 mm. The positioning holes 202 are detachably connected with positioning pins 203. When the main structure 100 is fixed to the fixing portion 201, the positioning pins 203 are positioned and matched with the rough-machined holes to achieve accurate positioning of the main structure 100 based on the rough-machined holes. At this time, the main structure 100 is finely adjusted on the positioning tool 200 to meet the preset position requirements, and then the main structure 100 is fixed. After the main structure 100 is stably fixed on the fixing part 201 with the rough-machined hole as the precise positioning reference, the positioning pin 203 is pulled out to expose the rough-machined hole there for subsequent hole finishing, wherein the height of the fixing part 201 is sufficient to ensure that the rough-machined hole at the bottom is also away from the mounting surface of the positioning tool 200, ensuring that the subsequent processing tool can penetrate all the rough-machined holes.

[0050] Before finishing, since the existing tools cannot meet the actual processing accuracy requirements and the length requirement of the processing tool is high, a new tool is designed to meet the actual processing needs.

[0051] In an embodiment of the present application, the processing technology also includes: obtaining the structural spacing between each group of ear structures, the ear spacing between each ear, and the thickness of each ear; configuring the second tool and the third tool based on the structural spacing, the ear spacing and the thickness, the second tool is a milling cutter, and the third tool is a reamer.

[0052] In a possible implementation, firstly obtain relevant parameter data of the ear piece, such as the structural spacing between each group of ear piece structures, the ear piece spacing between each ear piece, and the thickness of each ear piece, then configure the second tool and the third tool according to the above parameter data, and adopt a three-time drilling method to ensure that the high-precision hole finally obtained meets the precision requirements in all aspects.

[0053] In the embodiment of the present invention, Figure 4 As shown, the second tool 300 is a milling cutter tool, and the third tool 400 is a reamer tool. Since the milling cutter has higher linearity but poorer processing stability, and the reamer has better processing accuracy but poorer processing linearity, the use of the milling cutter in the second drilling can effectively ensure the axis accuracy of the high-precision hole, and then the reamer is used in the third drilling to continue cutting along the hole made in the previous process, and the reamer is limited by the hole in the previous process (combined with the smooth surface), so that it can have sufficient processing accuracy on the basis of sufficient processing linearity.

[0054] Specifically, the second tool 300 includes a first guide chamfer 303, a first blade 301, and a first tool handle 302, which are sequentially arranged from the front end to the rear end; the length of the first blade 301 is greater than the thickness and less than the sum of the ear piece spacing and the thickness; the first tool handle 302 is a smooth cylinder, the first blade 301 and the first tool handle 302 have the same diameter, and the diameter of the first blade 301 is greater than the diameter of the rough-machined hole and less than the diameter of the high-precision hole 102;

[0055] In a possible implementation, the thickness of the ear piece is 6 mm, the distance between the ear pieces is 10 mm, and the distance between each set of ear piece structures is 45 mm. Therefore, when configuring the second tool, the length of the first blade 301 is set to, for example, 15 mm, and then a first tool handle 302 with a smooth surface is fixedly connected behind the first blade 301, and the diameter of the first blade 301 is between the diameter of the rough-machined hole and the diameter of the high-precision hole 102.

[0056] When the rough-machined hole is machined in step 5), the milling cutter as the second tool 300 is first used for machining. When the first blade 301 penetrates the first layer of the ear piece and is about to machine the second layer of the ear piece, the first blade 301 leaves the first layer of the ear piece, and the first tool handle 302 is coaxially positioned with the hole of the first layer of the ear piece. Since the diameter of the first tool handle 302 is the same as that of the first blade 301, the first fine-machined hole cut by the first blade 301 is the same as the diameter of the first tool handle 302. For example, the diameter of the first fine-machined hole is 14.8 mm, thereby limiting the position of the first tool handle 302, and further limiting and guiding the overall position of the second tool, as well as supporting the overall structure of the second tool, enhancing the physical strength of the second tool, so that it will not shake during the machining process, and always maintains sufficient linearity. After the second tool penetrates all the ear piece structures at one time and completes the machining of all the first fine-machined holes, the second tool can be taken out and the final fine machining is performed.

[0057] In the embodiment of the present invention, by preferentially using a milling cutter to process the rough-machined holes, the linear stability of the milling cutter can be used to ensure the linear stability of all holes, and the position of the tool for the next processing can be limited and supported by the previous processing hole, which can effectively improve the physical strength of the tool and effectively overcome the problem of poor stability of the milling cutter. At the same time, in the second process, the hole is processed to a size close to the diameter of the high-precision hole 102, leaving a certain correction margin for further high-precision processing in the third process, ensuring that the high-precision hole 102 processed in the end can meet the high-precision requirements in terms of linearity and diameter deviation. At the same time, a first guide chamfer 303 is provided at the end of the first blade 301, which has a guiding role in the initial processing stage, allowing the first blade 301 to be processed smoothly, reducing vibration during processing, reducing processing difficulty, and making the tool more impact-resistant.

[0058] After the rough-machined hole is machined using the second tool 300 , a reamer as the third tool 400 is further used to perform finish machining.

[0059] In the embodiment of the present invention, Figure 5 As shown, the third tool 400 includes a second guide chamfer 404, a guide shaft 401, a second blade 402 and a second tool handle 403 which are arranged in sequence from the front end to the rear end; the guide shaft 401 and the second tool handle 403 are cylinders with smooth surfaces, the diameter of the guide shaft 401 is equal to the diameter of the first blade 301, the diameters of the second blade 402, the second tool handle 403 and the high-precision hole 102 are equal, and the length of the guide shaft 401 is equal to the length of the first blade 301; the length of the second blade 402 is less than the spacing between adjacent groups of ear structures, and is greater than the sum of the ear spacing and 2 times the thickness.

[0060] In a possible implementation, the guide shaft 401 has a diameter of 14.8 mm and a length of 15 mm. The second blade 402 and the second handle 403 are fixedly connected in sequence behind the guide shaft 401. The diameters of the second blade 402 and the second handle 403 are 15 mm, and the length of the second blade 402 is 25 mm.

[0061] During the processing of step 6), the third tool 400 gradually penetrates the first fine-machined hole on the ear piece structure 101 to form a high-precision hole 102. Specifically, the guide shaft 401 first enters the first fine-machined hole of the first ear piece and contacts it coaxially to form a guiding and supporting effect on the third tool 400. When the second blade 402 starts to process the first fine-machined hole, the guide shaft 401 further contacts the first fine-machined hole of the second ear piece coaxially to further constitute a limiting effect on the third tool 400. Due to the guiding effect of the guide shaft 401, the second blade 402 can be directly processed to the bottom of the first group of ear piece structures 101 at one time. At this time, the second tool handle 403 further contacts the high-precision hole 102 of the first ear piece coaxially to constitute a limiting, guiding and supporting effect on the third tool 400. Based on the same principle, the third tool 400 processes all the first fine-machined holes at one time to obtain all the high-precision holes 102.

[0062] In the embodiment of the present invention, by adopting a reamer as the final finishing tool, the processing accuracy of the reamer can be fully utilized to ensure that the diameter deviation of the final high-precision hole 102 is within the specified high-precision range, thereby improving the processing accuracy of the high-precision hole 102; at the same time, by using the front and rear guide circular shafts 401 and the second tool handle 403 to guide and limit the second blade 402, the defect of poor processing linearity of the reamer can be effectively overcome, and the processing linearity of the high-precision hole 102 can be ensured; further, since there is already a guide circular shaft 401 for guiding and limiting, by setting the length of the second blade 402 to be longer, the processing efficiency can be further improved, meeting the actual needs of the enterprise.

[0063] In order to further prevent the hole wall from being damaged due to chip breaking during the machining of the high-precision hole 102, an anti-chip breaking structure is provided on the second blade 402, specifically: Figure 6 The second blade 402 includes a plurality of blade portions 4021, and a chip breaker groove 4022 is arranged in the middle position of each blade portion, and the chip breaker groove 4022 includes a first chip guide groove 40221 arranged near the front end of the blade portion and a second chip guide groove 40222 arranged away from the front end of the blade portion, the depth of the first chip guide groove 40221 is greater than the depth of the second chip guide groove 40222, the length of the chip breaker groove 4022 is greater than half of the length of the blade portion 4021 and less than 7 / 8 of the length of the blade portion 4021, and the length of the first chip guide groove 40221 is 1 / 10 to 1 / 20 of the length of the second chip guide groove 40222.

[0064] In the specific implementation process, by opening a chip breaker groove 4022 on the reamer blade, on the one hand, the curvature of the reamer is utilized to reduce the generation of chip breakage, and on the other hand, the generated chip breakage can be guided and discharged through the chip breaker groove 4022, thereby avoiding the chip breaking from affecting the processing accuracy during the processing and improving the processing accuracy.

[0065] Since the first tool handle 302 and the second tool handle 403 are relatively long, both at least greater than 160 mm, it is necessary to ensure the structural stability in the case of long size, and the second tool 300 and the third tool 400 are both made of cemented carbide composed of cobalt.

[0066] However, in actual application, technicians found that the three-step processing method already has a higher processing accuracy. However, during the processing, the tool needs to be replaced according to the processing flow, which brings additional errors and may cause the processing of the high-precision hole 102 to fail to meet the high-precision requirements. Therefore, the tool needs to be improved.

[0067] like Figure 7 As shown, in an embodiment of the present invention, the first tool, the second tool 300 and the third tool 400 are connected in sequence from front to back to form an integrated tool, and the integrated tool includes a rough hole blade 600, the first guide chamfer 303, the first blade 301, the guide circular shaft 401, the second guide chamfer 404, the second blade 402 and the second tool handle 403 connected in sequence from front to back; the length of the rough hole blade 600 is greater than half of the overall height of the multiple groups of ear structure 101, and the diameter of the rough hole blade 600 is equal to the diameter of the rough processing hole.

[0068] In the specific processing process, after the main structure 100 is fixed, the upper ear structure of the main structure is first drilled by the integrated tool, then rotated 180° and drilled again, and then rotated 180° again to restore the original position.

[0069] At this time, the positioning tool is used to position according to the rough-machined hole, and then the integrated tool is inserted into all the ear pieces in sequence at one time to complete the processing operation of all the high-precision holes 102.

[0070] In the embodiment of the present application, by merging the first tool, the second tool and the third tool into an integrated tool, on the one hand, the front and rear connection relationship between different tools can be utilized to simplify the structure of the integrated tool, while the advantages of each tool can be utilized and integrated for processing, thereby achieving a one-time high-precision processing effect, greatly improving the processing efficiency and improving the operating benefits of the enterprise; on the other hand, since there is no need to replace the tool, the human error introduced in the process of replacing the tool is effectively overcome, the processing accuracy is further improved, and the actual needs of the enterprise are met.

[0071] Of course, both of the above two methods can achieve consistent processing of the high-precision hole 102 in this embodiment, and the specific selection can be made according to the actual processing scenario.

[0072] On the other hand, an embodiment of the present application further provides a high-precision titanium alloy support arm, which is manufactured according to the processing technology of a high-precision titanium alloy support arm for a flight device described in an embodiment of the present application.

[0073] In the present invention, 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 or an electrical connection; it can be 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0075] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A processing technology for high-precision titanium alloy support arms of flight equipment, characterized in that: The steps include: 1) Verify the size of incoming materials; 2) If the size verification is passed, the incoming material is preliminarily processed to obtain a main structure, wherein the main structure includes a plurality of groups of ear pieces, and each group of ear pieces includes a plurality of ear pieces; 3) using the main structure as a fixed reference, performing a rough punching operation on each set of ear piece structures by using a first tool to obtain a rough-machined hole; 4) taking the rough-machined hole as a precise positioning reference, and performing a precise positioning operation on the main structure based on the rough-machined hole; 5) performing a one-time first fine drilling operation on each ear piece by a second tool to obtain a first finely processed hole, wherein the linearity deviation of the first finely processed hole is less than 0.025 mm; 6) A one-time second fine punching operation is performed on the first punched ear piece by a third tool to obtain a high-precision hole, wherein the diameter deviation of the high-precision hole is less than 0.02 mm, and the ratio between the overall height of the multiple groups of ear piece structures and the diameter of the high-precision hole is greater than 10.

2. The processing technology of a high-precision titanium alloy support arm of a flight device according to claim 1 is characterized in that: Step 1) specifically includes: Determine the target size of the high-precision titanium alloy support arm and obtain the preset machining allowance; Determine the qualified incoming material size based on the target size and the preset machining allowance; Performing a three-dimensional projection operation on the incoming material based on the qualified incoming material size, and determining whether the three-dimensional projection is within the physical range of the incoming material; If so, generate a verification result indicating that the dimension verification passed; Otherwise, a verification result indicating that the incoming material is unqualified is generated.

3. The processing technology of a high-precision titanium alloy support arm of a flight device according to claim 2 is characterized in that: The processing technology is applied to a machine tool, a stroke pen is arranged on the machine tool, the stroke pen is elastically connected to the machine tool in a vertical direction, a distance sensor is arranged on the top of the stroke pen for collecting the real-time distance between the stroke pen and the machine tool, and step 1) further includes: After determining the size of the qualified incoming material, determining a qualified three-dimensional profile based on the size of the qualified incoming material, wherein the qualified three-dimensional profile includes three-dimensional depth information; Controlling the machine tool to fit the stroke pen onto the surface of the incoming material; Controlling the machine tool to drive the stroke pen to perform a corresponding three-dimensional stroke operation according to the qualified three-dimensional contour; Determining whether the real-time distance is consistent with the three-dimensional depth information; If so, generate a verification result indicating that the dimension verification passed; Otherwise, a verification result indicating that the incoming material is unqualified is generated.

4. The processing technology of a high-precision titanium alloy support arm of a flight device according to claim 1 is characterized in that: The processing technology also includes: Obtaining the structure spacing between each group of ear structures, the ear spacing between each ear, and the thickness of each ear; The second tool and the third tool are configured based on the structure spacing, the ear piece spacing and the thickness, the second tool is a milling cutter, and the third tool is a reamer.

5. The processing technology of a high-precision titanium alloy support arm of a flight device according to claim 4 is characterized in that: The second tool comprises a first guide chamfer, a first blade and a first tool handle which are sequentially arranged from the front end to the rear end; the length of the first blade is greater than the thickness and less than the sum of the ear piece spacing and the thickness; the first tool handle is a smooth cylinder, the first blade and the first tool handle have the same diameter, the diameter of the first blade is greater than the diameter of the rough-machined hole and less than the diameter of the high-precision hole; The third tool includes a second guide chamfer, a guide shaft, a second blade and a second tool handle which are arranged in sequence from the front end to the rear end; the guide shaft and the second tool handle are cylinders with smooth surfaces, the diameter of the guide shaft is equal to the diameter of the first blade, the diameters of the second blade, the second tool handle and the high-precision hole are equal, and the length of the guide shaft is equal to the length of the first blade; the length of the second blade is less than the spacing between adjacent groups of ear structures, and is greater than the sum of the ear spacing and twice the thickness.

6. The processing technology of the high-precision titanium alloy support arm of the flight equipment according to claim 5 is characterized by: The second blade includes multiple blades, and a chip breaker groove is arranged in the middle position of each blade, and the chip breaker groove includes a first chip guide groove arranged near the front end of the blade and a second chip guide groove arranged away from the front end of the blade, the depth of the first chip guide groove is greater than the depth of the second chip guide groove, the length of the chip breaker groove is greater than half of the length of the blade and less than 7 / 8 of the length of the blade, and the length of the first chip guide groove is 1 / 10~1 / 20 of the length of the second chip guide groove.

7. The processing technology of a high-precision titanium alloy support arm of a flight device according to claim 5 is characterized in that: When performing the rough drilling operation in step 3), firstly process half of the rough-machined holes after fixing the main structure, and then process the other half of the rough-machined holes after rotating the main structure 180° to position it, and finally rotate the processed main structure 180° to restore it to the initial position.

8. The processing technology of the high-precision titanium alloy support arm of the flight equipment according to claim 7 is characterized in that: The first tool, the second tool and the third tool are sequentially connected from front to back to form an integrated tool, and the integrated tool comprises a rough hole blade, the first guide chamfer, the first blade, the guide circular shaft, the second guide chamfer, the second blade and the second tool handle which are sequentially connected from front to back; The length of the rough hole blade is greater than half of the overall height of the multiple groups of ear piece structures, and the diameter of the rough hole blade is equal to the diameter of the rough processing hole.

9. The processing technology of a high-precision titanium alloy support arm of a flight device according to claim 1, characterized in that: Step 4) specifically includes: The main structure is placed on a positioning tool, wherein the positioning tool comprises a plurality of positioning holes, the diameter of the positioning holes is equal to the diameter of the high-precision holes, the position of each positioning hole is set in one-to-one correspondence with the position of the high-precision hole on the ear piece, and the distance deviation between the positioning holes is less than 0.02 mm; Align the rough-machined hole with the positioning hole, and insert a positioning pin through the rough-machined hole and the positioning hole; Adjust the position of the main structure according to the preset position requirements; The main structure is fixed by the fixing part on the positioning fixture, and the positioning pin is removed to complete the precise positioning operation.

10. A high-precision titanium alloy support arm, characterized in that: The high-precision titanium alloy support arm is manufactured according to the processing technology of a high-precision titanium alloy support arm for a flight device according to any one of claims 1-9.

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