Precise position degree machining method for inclined hole of shell assembly and application of precise position degree machining method

Abstract

The invention provides a shell assembly inclined hole precise position degree machining method and application, and the method comprises the steps: determining the detection position of the center point of an inclined hole of a shell assembly, and respectively arranging seam allowances in the circumferential direction of a lathe boring clamp and a reference surface A of the shell assembly; respectively leveling and aligning the reference surface A and the reference surface B; by leveling and aligning the reference surface A and the reference surface B, the positioning accuracy in the machining process can be ensured, so that the position accuracy of the inclined hole is greatly improved. During machining, the shell assembly is sequentially subjected to drilling and rough boring treatment to obtain a roughly machined inclined hole, then the inclined hole is subjected to position degree Y value detection, the position degree adjusting value Z is determined, then the hole center position of the inclined hole is adjusted, fine boring is conducted, and then the inclined hole with the precise position degree is obtained. The problems that according to a shell assembly inclined hole machining method, the position degree cannot be directly measured, the cutter relieving phenomenon is likely to occur in the machining process, the machining difficulty is large, and the roughness requirement cannot be met are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing and detection, and relates to a method for processing the precise position of an inclined hole of a shell component and an application thereof. Background Art

[0002] The shell assembly of the air intake bearing frame unit of an aircraft engine is connected by a shell and an inner ring of an adjustable guide vane through locating pins and bolts. The shell material is ZTC4, and the adjustable guide vane material is 2A70. The shell assembly has 17 inclined holes evenly distributed along the circumference, which are deflected 5°30′ relative to the radial direction, and are used to assemble 17 adjustable guide vanes. The processing of inclined holes of this type of shell assembly includes the following difficulties: 1) The position of the inclined hole of the shell component cannot be measured directly like Figure 2 As shown, because the 17 holes uniformly distributed around the shell assembly are inclined holes, the three-coordinate system cannot directly detect the distance between the center point of the hole and the reference A, and cannot directly detect and judge the position of the inclined hole.

[0003] 2) The inclined hole of the shell component is composed of two materials like Figure 2 As shown, the upper semicircular hole of the inclined hole is made of aluminum alloy (2A70), and the lower semicircular hole of the inclined hole is made of titanium alloy (ZTC4). Because the inclined hole is composed of two materials, the tool deflection phenomenon is easy to occur during the processing process.

[0004] 3) The position accuracy of the shell component oblique hole is required to be high like Figure 2 As shown, the shell component has 17 locations 12.5+0.018 0mm evenly distributed around the circumference, and the positioning requirement is an inclined hole of 0.04mm relative to the A and B references. The positioning requirement is relatively high and the processing difficulty is great.

[0005] 4) The surface roughness requirements of the inclined hole of the shell component are relatively high The roughness requirement is Ra1.6. Affected by the length of the boring cutter bar, tool vibration is prone to occur during the machining process, resulting in ripples on the surface of the precision inclined hole, which cannot meet the roughness requirements.

[0006] In summary, the existing shell component inclined hole processing methods have the problems that the position cannot be directly measured, the tool is easily deflected during the processing, the processing is difficult, and the roughness requirements cannot be met. It is necessary to design a processing plan from the aspects of position detection method, fixture design, benchmark leveling and alignment, so as to realize the precise position processing of shell component inclined holes. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention provides a method and application for the precision position machining of the inclined hole of a shell component, which solves the problems that the position cannot be directly measured in the method for machining the inclined hole of the shell component, the tool is easily let down during the machining process, the machining is difficult, and the roughness requirements cannot be met; The present invention is achieved through the following technical solutions: A method for machining the precise position of an inclined hole of a housing component, comprising: Before processing, determine the detection position of the center point of the inclined hole of the housing component, and set stoppers on the reference surface A of the boring fixture and the housing component along the circumferential direction; through the stoppers, level and align the reference surface A and the reference surface B respectively; During processing, the shell components are drilled in sequence, and a rough-machined inclined hole is obtained after rough boring. The position Y value of the inclined hole is then detected to determine the position adjustment value Z, and then the center position of the inclined hole is adjusted. Finally, fine boring is performed to obtain an inclined hole with precise position.

[0008] Preferably, the detection position of the center point of the inclined hole is determined, and the specific process is: The position of the inclined hole relative to the reference plane A is converted into the distance between the center point of the radius L2 of the reference plane A and the center line of the inclined hole, which is the detection value Y.

[0009] Preferably, the calculation formula of the detection value Y is: Y=cosα{L4+tanα[(L1-L2)L4 / L3+L2]}; Among them, L1 is the radius of the large end face of the shell, L2 is the radius of the reference plane A, L3 is the distance from the reference plane A to the large end face, and L4 is the distance from the center point of the inclined hole to the reference plane A.

[0010] Preferably, the position Y value detection of the inclined hole is carried out in the following specific process: Take the maximum value Y of the inclined hole detection value Y max and minimum value Y min Calculate the position adjustment value Z of the inclined hole to be fine-bored, and adjust the center position of the inclined hole according to the Z value; Preferably, the calculation formula of the position adjustment value Z is: Z=(Y max -Y min ) / 2.

[0011] Preferably, before rough boring and fine boring of the inclined hole, the flatness of the reference surface A of the housing assembly needs to be ground to within 0.005 mm.

[0012] Preferably, the reference of the leveling reference surface A is within 0.005 mm; the reference of the alignment reference surface B is within 0.005 mm.

[0013] Preferably, the detection value Y of the inclined hole is measured by precise three-coordinate measurement.

[0014] Preferably, the drilling, rough boring and fine boring processes are all processed on a CNC five-axis ultra-precision boring and milling machining center.

[0015] Application of a precision position machining method for inclined holes of casing components in casing components of aircraft engines, Compared with the prior art, the present invention has the following beneficial technical effects: The present invention provides a method for processing the precise position of an inclined hole of a shell component. Before processing, the detection position of the center point of the inclined hole of the shell component is determined, and stoppers are respectively set on the boring fixture and the reference surface A of the shell component along the circumferential direction; stoppers are respectively set on the boring fixture and the reference surface A of the shell component along the circumferential direction, and the stoppers are used for positioning and fixing, thereby increasing the stability during the processing and reducing the processing error caused by unstable clamping. The stoppers are used to level and align the reference surface A and the reference surface B respectively; the positioning accuracy during the processing can be ensured by accurately leveling and aligning the reference surface A and the reference surface B, thereby greatly improving the position accuracy of the inclined hole. During processing, the shell component is drilled in sequence, and a rough-bored inclined hole is obtained after rough boring, and then the position Y value of the inclined hole is detected to determine the position adjustment value Z, and then the center position of the hole of the inclined hole is adjusted, and then fine boring is performed to obtain a precise position inclined hole. The present invention can directly detect the distance from the straight hole to the reference plane through the position of the circumferential radial straight hole, and the position of the circumferential radial inclined hole can be detected, and the position of the hole relative to the reference can be converted into the vertical distance from the hole axis to the reference plane, and the mathematical formula between the two distances can be summarized. Through this conversion and calculation method, the position requirements of the inclined hole can be accurately converted into a measurable value, which solves the problems of the shell component inclined hole processing method that the position cannot be directly measured, the tool is prone to let-down during the processing process, the processing is difficult, and the roughness requirements cannot be met; Furthermore, 6 evenly distributed leveling and alignment stops are designed on the turning and boring fixture, which can directly level and align the parts before rough boring and fine boring. This solves the problem that the processing positioning datum and the inspection datum are consistent and the parts cannot be directly leveled and aligned, thus ensuring the precise positioning of the inclined hole of the shell.

[0016] Furthermore, after rough boring of the inclined hole, the present invention uses precise three-coordinate measurement to detect the position of the inclined hole, determines the position adjustment value of the fine boring of the inclined hole, and summarizes the calculation formula of the position adjustment value.

[0017] Furthermore, a set of precision inclined hole position machining process solutions was designed, which is suitable for the position machining of straight holes, inclined holes, radial holes, and axial holes, and is universal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is the process flow chart of the precise position of the inclined hole of the shell component; Figure 2 It is a simplified diagram of the shell assembly structure and position requirements; Figure 3 This is the front view of the structure of the clamping shell assembly of the boring fixture; Figure 4 It is a top view of the structure of the clamping shell assembly of the boring fixture; Figure 5 This is the main view showing the leveling and alignment of the positioning ring of the boring fixture and the position and size of the stop; Figure 6 It is a side view showing the leveling and alignment of the positioning ring of the boring fixture and the position and size of the stop; DETAILED DESCRIPTION The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0019] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] Embodiment 1, a method for machining the precise position of an inclined hole of a housing component, such as Figure 1 As shown, including, Before processing, determine the detection position of the center point of the inclined hole of the shell component, and set stoppers along the circumferential direction on the reference surface A of the boring fixture and the shell component; through the stoppers, level and align the reference surface A and the reference surface B respectively; the reference of the leveling reference surface A is within the preset value; the reference of the alignment reference surface B is within the preset value.

[0021] During processing, the shell components are drilled in sequence, and a rough-machined inclined hole is obtained after rough boring. The position Y value of the inclined hole is then detected to determine the position adjustment value Z, and then the center position of the inclined hole is adjusted. Finally, fine boring is performed to obtain an inclined hole with precise position.

[0022] By accurately leveling and aligning the datum plane A and datum plane B, the positioning accuracy during the processing can be ensured, thereby greatly improving the position accuracy of the inclined hole. This precision processing method can meet the occasions with strict requirements on the position accuracy of the inclined hole.

[0023] Stops are respectively arranged along the circumferential direction on the reference surface A of the boring fixture and the housing assembly, and positioning and fixing are performed through the stoppers, which increases the stability during the processing and reduces the processing errors caused by unstable clamping.

[0024] This method achieves refined control of the machining process by first drilling and rough boring, then position detection and fine boring. Although the detection and adjustment steps are added, these steps can timely detect and correct machining deviations, avoid rework caused by one-time processing failure, and thus improve the overall machining efficiency.

[0025] This method is not only suitable for the oblique hole processing of a specific type of shell component, but can also be appropriately adjusted and optimized as needed to meet the needs of oblique hole processing of shell components of different specifications and shapes.

[0026] The processing method of the present invention is not only applicable to inclined holes, but also to straight holes, inclined holes, radial holes, and axial holes; One of the preferred implementations is to determine the detection position of the center point of the inclined hole, and the specific process is: like Figure 2 As shown, the position of the inclined hole relative to the reference plane A is converted into the distance between the center point of the radius L2 of the reference plane A and the center line of the inclined hole, which is the detection value Y.

[0027] Preferably, the calculation formula of the detection value Y is: Y=cosα{L4+tanα[(L1-L2)L4 / L3+L2]}; Among them, L1 is the radius of the large end face of the shell, L2 is the radius of the reference plane A, L3 is the distance from the reference plane A to the large end face, and L4 is the distance from the center point of the inclined hole to the reference plane A.

[0028] This method provides a clear control indicator (Y value) for the machining process. During the machining process, the operator can adjust the machining parameters according to the real-time feedback of the Y value, thereby achieving precise control of the position of the inclined hole. By precisely controlling the position of the inclined hole, the scrap rate and rework rate can be reduced, thereby improving production efficiency and product quality. At the same time, a stable machining process also helps to reduce production costs and improve the economic benefits of the enterprise. This method is not only suitable for the inclined hole machining of simple-shaped shell components, but can also be appropriately adjusted and optimized as needed to adapt to more complex shapes and size requirements. This makes this method have broad application prospects in aerospace, precision instruments and other fields.

[0029] In one of the preferred implementations, the position Y value detection of the inclined hole is performed in the following specific process: Take the maximum value Y of the inclined hole detection value Y max and minimum value Y minCalculate the position adjustment value Z of the inclined hole to be fine-bored, and adjust the center position of the inclined hole according to the Z value; The calculation formula of the position adjustment value Z is: Z=(Y max -Y min ) / 2.

[0030] During the processing, the position adjustment value Z can be accurately determined by detecting the position Y value, and then the center position of the inclined hole can be accurately adjusted. This processing method based on data feedback can ensure that the processing quality of each inclined hole meets the predetermined standard.

[0031] Preferably, before rough boring and fine boring of the inclined hole, the flatness of the reference surface A of the housing assembly needs to be ground to within 0.005 mm. The flatness of the reference surface A reaches a high precision of 0.005 mm, providing a stable positioning reference for the subsequent processing process. This helps to reduce the processing error caused by the uneven reference surface, thereby improving the position and shape accuracy of the inclined hole.

[0032] Embodiment 2, the present invention includes two technical requirements before and during the precision oblique hole processing of the shell component, and the steps are as follows: Figure 1 As shown: (1) Conversion of the detection position of the center point of the inclined hole of the housing assembly As shown Figure 3 and Figure 4 As shown in the figure, according to the design drawing dimensions, the radius of the large end face of the shell assembly is L1, the radius of the reference surface A is L2, the distance between the reference A and the large end face is L3, and the distance from the center point of the hole to the reference surface A is L4. Since the three-coordinate system cannot directly detect the L4 value, the position of the inclined hole relative to the reference is converted into the distance between the center point of the radius L2 of the reference surface A and the center line of the hole, which is named Y here. The simple structure of the shell and the design drawing dimensions are shown in Figure 2 The calculation formula between the test value Y and the design drawing size is: Y=cosα{L4+tanα[(L1-L2)L4 / L3+L2]}; where L1 is the radius of the large end face of the shell, L2 is the radius of the reference plane A, L3 is the distance from the reference plane A to the large end face, and L4 is the distance from the center point of the inclined hole to the reference plane A.

[0033] (2) Design of stopper for boring fixture To ensure the accuracy of leveling and alignment before boring the inclined hole of the shell component, and to take into account the support rigidity of the fixture to the datum A, 6 leveling and alignment stoppers are evenly distributed along the circumference on the positioning surface of the boring fixture and the shell component datum A, with a size of 15*17mm. The position and size of the leveling and alignment stoppers of the boring fixture are shown in Figure 3 ; Before rough boring and fine boring of inclined holes, the flatness of the reference surface A of the shell component is ground to within 0.005mm; the diamond pin 2 and cylindrical pin 6 are used to fix the angle of the shell component; the pressure plate 5 is used to press the upper end surface of the shell component; the locating ring 1 of the boring fixture is used for leveling and alignment, and the leveling reference A is within 0.005mm, and the alignment reference B is within 0.005mm.

[0034] The high-precision reference surface A can ensure the stable clamping of the housing assembly during the machining process, reducing the vibration and displacement caused by unstable clamping. This helps to maintain stable contact between the tool and the workpiece, and improves the stability and reliability of the machining process.

[0035] The high-precision flatness of the reference surface A helps reduce cutting force fluctuations and tool wear during machining, thereby improving the surface quality and dimensional accuracy of the inclined hole. In addition, the stable machining process also helps reduce the scrap rate and rework rate, improving production efficiency and product quality.

[0036] (4) Drilling On a CNC five-axis ultra-precision boring and milling machining center, a Φ9mm alloy milling cutter was used to drill 17 oblique holes at a spindle speed of 1200r / min and a feed rate of 30mm / min, and the size was processed to 9mm; (5) Rough boring On a CNC five-axis ultra-precision boring and milling machining center, a boring cutter with a back angle of 7° and a tool tip radius of R0.4 was used to rough bore 17 inclined holes at a spindle speed of 600r / min and a feed rate of 30mm / min, and the size was processed to 11mm.

[0037] (6) Detection of position Y value Send the boring fixture and the shell assembly to the precision three-dimensional coordinate system to detect the Y value (detection value) of the inclined hole. The Y values ​​of the 17 inclined holes are Y1, Y2, Y3, and Y min 、Y5、Y6、Y7、Y8、Y9、Y 10 , Y 11 , Y 12 , Y max , Y 14 , Y 15 , Y 16 , Y 17 . Take the maximum value Y of the inclined hole Y (detection) max and Y min Calculate the position adjustment value Z of the precision boring inclined hole, Z=(Y max -Y min ) / 2, adjust the center position of the inclined hole according to the Z value.

[0038] (7) Fine boring On the CNC five-axis ultra-precision boring and milling machining center, a boring cutter with a back angle of 7° and a tool tip radius of R0.4 was used to fine bore 17 inclined holes at a spindle speed of 600r / min and a feed rate of 30mm / min. The size was machined to 12.5mm; to ensure the position accuracy of the 17 inclined holes of the housing component, a new boring cutter blade was required for fine boring with a 1.5mm allowance; to control the semicircular deformation of different materials above and below the precision inclined hole, fine boring required 10 cuts, and the allowance distribution for each cut is shown in the table below.

[0039]

[0040] (8) Precision inclined hole processing method for shell components like Figure 5 and Figure 6 As shown, in order to ensure that the position accuracy of the inclined hole 17 of the shell component is within 0.04mm after processing, it is necessary to convert the detection position of the hole position accuracy, set the leveling and alignment stop on the fixture, clarify the flatness of the datum A, the leveling requirements of the datum A, the alignment requirements of the datum B, calculate the position accuracy adjustment value and other technical requirements. The specific processing flow is as follows Figure 1 ; (9) Other rights statement Other parts involve the detection method of the inclined hole position. If the vertical distance from the axial direction of the hole to the reference surface is detected, it belongs to the present invention; In order to process the precision hole position of shell parts, no matter how many leveling and alignment stops are set, they all belong to the present invention; The technical requirements for the flatness, leveling and alignment of the reference surface for machining the precision hole position of shell parts belong to the present invention; Precision hole processing of shell parts, whether straight holes, oblique holes, radial holes, axial holes, and no matter how many holes there are, if the processing method designed by the present invention is used, all belong to the present invention.

[0041] Through this conversion and calculation method, the position requirements of the inclined hole can be accurately converted into a measurable value (Y value). This helps to monitor the position of the inclined hole in real time during the processing process to ensure that it meets the design requirements.

[0042] Using an accurate calculation formula to determine the detection value Y can greatly improve the accuracy of inclined hole processing. This method reduces human errors and measurement errors, making the position of the processed inclined hole more accurate. Converting the inclined hole position to the distance (Y value) between the center point of the radius L2 of the reference surface A and the center line of the inclined hole makes the measurement process more intuitive and simple. The operator only needs to measure this distance and calculate the Y value through the formula to determine whether the inclined hole position meets the requirements.

[0043] Embodiment 3, the present invention includes two technical requirements before and during the precision oblique hole processing of the shell component, and the steps are as follows: Figure 1 As shown: (1) Conversion of the detection position of the center point of the inclined hole of the housing assembly According to the design dimensions, the radius of the large end face of the shell assembly is L1, the radius of the reference surface A is L2, the distance between the reference A and the large end face is L3, and the distance from the center point of the hole to the reference surface A is L4. Since the three-coordinate measurement cannot directly detect the L4 value, the position of the inclined hole relative to the reference is converted into the distance between the center point of the radius L2 of the reference surface A and the center line of the hole, which is named Y here. The simple structure of the shell and the design dimensions are shown in Figure 2 The calculation formula between the test value Y and the design drawing size is: Y=cosα{L4+tanα[(L1-L2)L4 / L3+L2]}; where L1 is the radius of the large end face of the shell, L2 is the radius of the reference plane A, L3 is the distance from the reference plane A to the large end face, and L4 is the distance from the center point of the inclined hole to the reference plane A.

[0044] (2) Design of stopper for boring fixture To ensure the accuracy of leveling and alignment before boring the inclined hole of the shell component, and to take into account the support rigidity of the fixture to the datum A, 8 leveling and alignment stoppers evenly distributed along the circumference are set on the positioning surface of the boring fixture and the shell component datum A, with a size of 12*14mm. The position and size of the leveling and alignment stoppers of the boring fixture are shown in Figure 3 ; Preparation work before machining Before rough boring and fine boring of inclined holes, grind the flatness of the reference surface A of the shell component to within 0.005mm; use diamond pin 2 and cylindrical pin 6 to fix the angle of the shell component; use pressure plate 5 to press the upper end surface of the shell component; use the locating ring 1 of the boring fixture to level and align, the leveling reference A is within 0.005mm, and the alignment reference B is within 0.005mm.

[0045] (4) Drilling On a CNC five-axis ultra-precision boring and milling machining center, a Φ10mm alloy milling cutter was used to drill 17 oblique holes at a spindle speed of 1100r / min and a feed rate of 30mm / min, and the size was machined to 10mm; (5) Rough boring On a CNC five-axis ultra-precision boring and milling machining center, a boring cutter with a back angle of 7° and a tool tip radius of R0.4 was used to rough bore 17 inclined holes at a spindle speed of 500r / min and a feed rate of 20mm / min, and the size was machined to 11mm.

[0046] (6) Detection of position Y value Send the boring fixture and the shell assembly to the precision three-dimensional coordinate system to detect the Y value (detection value) of the inclined hole. The Y values ​​of the 17 inclined holes are Y1, Y2, Y3, and Y min 、Y5、Y6、Y7、Y8、Y9、Y 10, Y 11 , Y 12 , Y max , Y 14 , Y 15 , Y 16 , Y 17 . Take the maximum value Y of the inclined hole Y (detection) max and Y min Calculate the position adjustment value Z of the precision boring inclined hole, Z=(Y max -Y min ) / 2, adjust the center position of the inclined hole according to the Z value.

[0047] (7) Fine boring On the CNC five-axis ultra-precision boring and milling machining center, a boring tool with a back angle of 7° and a tool tip radius of R0.4 was used to fine bore 15 inclined holes at a spindle speed of 500r / min and a feed rate of 30mm / min. The size was processed to 11mm; in order to ensure the position accuracy of the 17 inclined holes of the housing component, a new boring tool blade was required for fine boring with a 1.5mm allowance; in order to control the semicircular deformation of different materials above and below the precision inclined hole, fine boring required 10 cuts. (8) Precision inclined hole processing method for shell components In order to ensure that the position accuracy of the inclined hole 17 of the shell component is within 0.04mm after processing, it is necessary to change the detection position of the hole position accuracy, set the leveling and alignment stop on the fixture, clarify the flatness of the datum A, the leveling requirements of the datum A, the alignment requirements of the datum B, calculate the position accuracy adjustment value and other technical requirements. The specific processing process is as follows: Figure 1 ; 9) Other rights statement Other parts involve the detection method of the inclined hole position. If the vertical distance from the axial direction of the hole to the reference surface is detected, it belongs to the present invention; In order to process the precision hole position of shell parts, no matter how many leveling and alignment stops are set, they all belong to the present invention; The technical requirements for the flatness, leveling and alignment of the reference surface for machining the position of the precision holes of shell parts belong to the present invention; Precision hole processing of shell parts, whether straight holes, oblique holes, radial holes, axial holes, and no matter how many holes there are, if the processing method designed by the present invention is used, all belong to the present invention.

[0048] This method provides a clear control indicator (Y value) for the machining process. During the machining process, the operator can adjust the machining parameters according to the real-time feedback of the Y value, thereby achieving precise control of the position of the inclined hole. By precisely controlling the position of the inclined hole, the scrap rate and rework rate can be reduced, thereby improving production efficiency and product quality. At the same time, a stable machining process also helps to reduce production costs and improve the economic benefits of the enterprise. This method is not only suitable for the inclined hole machining of simple-shaped shell components, but can also be appropriately adjusted and optimized as needed to adapt to more complex shapes and size requirements. This makes this method have broad application prospects in aerospace, precision instruments and other fields.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A method for precision positioning of an inclined hole of a housing component, characterized in that: include, Before processing, determine the detection position of the center point of the inclined hole of the housing component, and set stoppers on the reference surface A of the boring fixture and the housing component along the circumferential direction; through the stoppers, level and align the reference surface A and the reference surface B respectively; During processing, the shell components are drilled in sequence, and a rough-machined inclined hole is obtained after rough boring. The position Y value of the inclined hole is then detected to determine the position adjustment value Z, and then the center position of the inclined hole is adjusted. Finally, fine boring is performed to obtain an inclined hole with precise position.

2. A method for precision positioning of an inclined hole of a housing component according to claim 1, characterized in that: The specific process of determining the detection position of the center point of the inclined hole is as follows: The position of the inclined hole relative to the reference plane A is converted into the distance between the center point of the radius L2 of the reference plane A and the center line of the inclined hole, which is the detection value Y.

3. A method for precision positioning of an inclined hole of a housing component according to claim 2, characterized in that: The calculation formula of the detection value Y is: Y=cosα{L4+tanα[(L1-L2)L4 / L3+L2]}; Among them, L1 is the radius of the large end face of the shell, L2 is the radius of the reference plane A, L3 is the distance from the reference plane A to the large end face, and L4 is the distance from the center point of the inclined hole to the reference plane A.

4. A method for precision position machining of an inclined hole of a housing component according to claim 1, characterized in that: The specific process of detecting the position Y value of the inclined hole is as follows: Take the maximum value Y of the inclined hole detection value Y max and minimum value Y min Calculate the position adjustment value Z of the inclined hole to be precision bored, and adjust the center position of the inclined hole according to the Z value.

5. A method for precision position machining of an inclined hole of a housing component according to claim 4, characterized in that: The calculation formula of the position adjustment value Z is: Z=(Y max -AND min ) / 2。 6. A method for precision position machining of an inclined hole of a housing component according to claim 1, characterized in that: Before rough boring and fine boring of inclined holes, the flatness of the reference surface A of the housing assembly must be ground to within 0.005mm.

7. A method for precision position machining of an inclined hole of a housing component according to claim 1, characterized in that: The reference of the leveling reference surface A is within 0.005mm; the reference of the alignment reference surface B is within 0.005mm.

8. A method for precision position machining of an inclined hole of a housing component according to claim 1, characterized in that: The detection value Y of the inclined hole is measured by precise three-coordinate measurement.

9. A method for precision position machining of an inclined hole of a housing component according to claim 1, characterized in that: The drilling, rough boring and fine boring processes are all processed on a CNC five-axis ultra-precision boring and milling machining center.

10. Application of a method for precision positioning of an inclined hole of a casing component in a casing component of an aircraft engine, based on the processing method according to any one of claims 1 to 9.

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