A machining tool and method for positioning holes on the end face of a thin-walled part
By designing machining fixtures for thin-walled parts and utilizing a combination of positioning seats and clamping modules, the fixtures achieve support, positioning, and uniform force distribution on the thin-walled parts, solving the problem of deformation during machining and ensuring machining accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUBEI SANJIANG AEROSPACE HONGFENG CONTROL
- Filing Date
- 2024-12-10
- Publication Date
- 2026-05-19
AI Technical Summary
Thin-walled parts are prone to deformation during processing, making it difficult to guarantee dimensional and geometric tolerances.
The machining fixture includes a positioning seat, a bottom clamping module, and a top clamping module. It supports and positions the thin-walled part and applies uniform axial force through a slide groove and bolt connection. It also combines a cutting fluid collection tank and a drain hole to treat the cutting fluid.
It effectively prevents thin-walled parts from deforming during processing, ensuring the accuracy of dimensions and geometric tolerances.
Smart Images
Figure CN119566889B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of machining, and specifically relates to a machining fixture and method for positioning holes on the end face of thin-walled parts. Background Technology
[0002] Thin-walled parts are large in size, have large machining allowances, and relatively low rigidity. Under the influence of machining factors, they are prone to machining deformation, and it is difficult to control machining accuracy. Machining deformation has become an important constraint for thin parts.
[0003] Currently, a key component is a thin-walled part, and the part is relatively long, with the thin-walled length accounting for approximately 85% of the total length. (See...) Figure 1 The thin-walled component comprises a first section and a second section with different thicknesses (the first and second sections are coaxial and have the same inner diameter). The wall thickness of the first section is approximately 0.9% of the component's length, and the wall thickness of the second section is approximately 0.5% of the component's length. Before leaving the factory, multiple high-precision positioning holes need to be machined on the end face of the first section (facing away from the second section). Specifically, the positioning holes are machined using the basic machining reference of the inner and outer holes of the thin-walled component. However, in the actual machining process, it is difficult to keep the thin-walled component from deforming, making it difficult to guarantee dimensional and geometric tolerances. Summary of the Invention
[0004] In view of the above-mentioned defects or improvement needs of the prior art, the present invention provides a machining fixture and method for positioning holes on the end face of thin-walled parts. Its purpose is to reliably realize the support and positioning of the bottom of the thin-walled parts and the pressing of the top of the thin-walled parts. The thin-walled parts are only subjected to uniform force in the axial direction, so that the thin-walled parts are not easily deformed during actual processing, and the dimensional tolerances and geometric tolerances of the thin-walled parts are guaranteed.
[0005] To achieve the above objectives, in a first aspect, the present invention provides a machining fixture for positioning holes on the end face of thin-walled parts, the machining fixture comprising a machining table and a positioning assembly;
[0006] The processing table has multiple spaced-apart slides, each of which extends along a first direction;
[0007] The positioning assembly includes a positioning seat, multiple bottom clamping modules, and multiple top clamping modules. The positioning seat is placed on the processing table. The top of the positioning seat is used to insert into the inner holes of the first and second sections of the thin-walled component, and the bottom of the positioning seat has an outer flange to support the second section of the thin-walled component. Each bottom clamping module includes a first slider, a first support column, and a first pressure plate. The first slider is slidably inserted into the corresponding slide groove. The first support column is placed on the processing table. The two ends of the first pressure plate are respectively pressed onto the outer flange and the first support column, and bolts are inserted into the first pressure plate to connect the first slider. Each top clamping module includes a second slider, a second support column, a second pressure plate, and a connecting rod. The second slider is slidably inserted into the corresponding slide groove. The second support column is placed on the processing table. The two ends of the second pressure plate are respectively pressed onto the end face of the first section of the thin-walled component and the second support column. Both ends of the connecting rod are provided with coaxially arranged first studs. One first stud is threadedly engaged with the second slider, and the other first stud passes through the second pressure plate and is locked to the second pressure plate by a nut.
[0008] Optionally, the positioning seat has a cutting fluid collection tank, which has a conical structure and faces the machining table, with the diameter of the cutting fluid collection tank gradually decreasing.
[0009] Optionally, the positioning seat has a drain hole located below the cutting fluid collection tank and communicating with the cutting fluid collection tank.
[0010] Optionally, each of the top clamping modules further includes a third slider, which is slidably inserted into the corresponding slide groove. The third slider is provided with a second stud, the top end of which is threadedly engaged with the second support column.
[0011] Optionally, the first pressure plate and the second pressure plate have strip-shaped holes, and the bolt and the first stud are movably inserted into the corresponding strip-shaped holes.
[0012] Optionally, the groove is a T-shaped structure or a dovetail-shaped structure.
[0013] Optionally, the end of each of the first pressure plates facing the outer flange and the end of each of the second pressure plates facing away from the second support column are both tapered structures.
[0014] Optionally, both the second support column and the connecting rod are steel structures, and the diameter of the second support column is larger than the diameter of the connecting rod.
[0015] In a second aspect, the present invention provides a method for machining positioning holes on the end face of a thin-walled part, the machining method being based on the machining fixture described in the first aspect, the machining method comprising:
[0016] The positioning seat is placed on the processing table, and the positioning seat is fixed on the processing table by the bottom clamping module;
[0017] The first and second sections of the thin-walled component are fitted onto the positioning seat, and the thin-walled component is pressed onto the positioning seat by a plurality of the top pressing modules;
[0018] Positioning holes are machined on the first end face of the thin-walled part using a machine tool.
[0019] Optionally, before machining the positioning hole on the first end face of the thin-walled part using a machine tool, the machining method further includes:
[0020] Install the first adjusting rod on the machine tool spindle tool holder, and provide a second adjusting rod and a dial indicator. Install the dial indicator on the second adjusting rod, and install the second adjusting rod on the first adjusting rod.
[0021] When the dial indicator's pointer is inside the machine tool's worktable, the scale is calibrated and fine-tuned using the principle of plane mirror reflection to ensure that the center of the thin-walled part is aligned within ±0.005mm.
[0022] Disassemble the first and second adjusting rods, replace the milling cutter, and machine the positioning hole.
[0023] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.
[0024] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include:
[0025] For the machining fixture for positioning holes on the end face of thin-walled parts provided in this embodiment of the invention, when machining positioning holes on thin-walled parts, firstly, the positioning seat is placed on the machining table, and then fixed on the machining table by the bottom clamping modules. Since the first slider is slidably inserted into the corresponding slide groove, and the first support is placed on the machining table, the positions of the first slider and the first support can be easily adjusted, and the position of the first pressure plate can also be easily adjusted. This allows for reasonable adjustment of the positions of the multiple bottom clamping modules on the machining table, facilitating adaptive pressing of the positioning seat. In addition, the two ends of the first pressure plate are respectively pressed onto the outer flange and the first support, thereby achieving reliable pressing and positioning of the positioning seat.
[0026] Next, the first and second segments of the thin-walled component are fitted onto the positioning seat, and multiple top clamping modules press the thin-walled component onto the positioning seat. On one hand, fitting the first and second segments of the thin-walled component onto the positioning seat allows for precise positioning of the component. Furthermore, the first segment of the thin-walled component has a relatively large wall thickness, allowing for a large insertion length when positioned by inserting it into the positioning seat, which also makes the internal hole support and positioning of the thin-walled component more reliable. On the other hand, since the second slider is slidably inserted into the corresponding groove, and the second support column is placed on the machining table, the positions of the connecting rod and the second support column can be easily adjusted, which in turn allows for easy adjustment of the position of the second pressure plate. This allows for reasonable adjustment of the positions of the multiple top clamping modules on the machining table, facilitating adaptive pressing of the thin-walled component onto the positioning seat. Ultimately, this reliably achieves support and positioning of the bottom of the thin-walled component and pressing of its top, ensuring that the thin-walled component is subjected to uniform force only in the axial direction, thus preventing deformation during actual processing. Finally, positioning holes are machined on the end face of the first segment of the thin-walled component using a machine tool.
[0027] In other words, the machining fixture for positioning holes on the end face of thin-walled parts provided by the embodiments of the present invention can reliably achieve support and positioning of the bottom of the thin-walled parts and pressing of the top of the thin-walled parts. The thin-walled parts are only subjected to uniform force in the axial direction, so that the thin-walled parts are not easily deformed during actual processing, and the dimensional tolerances and form and position tolerances of the thin-walled parts are guaranteed. Attached Figure Description
[0028] Figure 1 This is a cross-sectional view of the thin-walled component provided in an embodiment of the present invention;
[0029] Figure 2 This is a schematic diagram of a machining fixture for positioning holes on the end face of a thin-walled part, provided in an embodiment of the present invention.
[0030] Figure 3 This is a cross-sectional view of a machining fixture for positioning holes on the end face of a thin-walled part, provided in an embodiment of the present invention.
[0031] Figure 4 This is a flowchart of a method for processing positioning holes on the end face of a thin-walled part, provided by an embodiment of the present invention;
[0032] Figure 5 This is a schematic diagram of the structure of the first adjusting lever provided in an embodiment of the present invention.
[0033] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:
[0034] 1. Machining table; 11. Slide groove; 12. Cutting fluid collection tank; 13. Drain hole; 2. Positioning assembly; 21. Positioning seat; 211. Outer flange; 22. Bottom clamping module; 221. First slider; 222. First support column; 223. First pressure plate; 2231. Bolt; 23. Top clamping module; 231. Second slider; 232. Second support column; 233. Second pressure plate; 234. Connecting rod; 2341. First stud; 2342. Nut; 235. Third slider; 2351. Second stud; 3. First adjusting rod; 4. Second adjusting rod; 5. Screw; 100. Thin-walled part; 101. First section; 102. Second section; 103. Positioning hole. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.
[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0040] Example:
[0041] Figure 2 This is a schematic diagram of a machining fixture for positioning holes on the end face of a thin-walled part, provided by an embodiment of the present invention. Figure 3 This is a cross-sectional view of a machining fixture for positioning holes on the end face of a thin-walled part, provided in an embodiment of the present invention. Figure 2 and Figure 3 As shown, the machining fixture includes a machining table 1 and a positioning component 2.
[0042] The processing table 1 has multiple spaced slides 11, each slide 11 extending along a first direction (X-axis direction).
[0043] The positioning assembly 2 includes a positioning seat 21, multiple bottom clamping modules 22, and multiple top clamping modules 23. The positioning seat 21 is placed on the processing table 1. The top of the positioning seat 21 is used to insert into the inner holes of the first section 101 and the second section 102 of the thin-walled component 100, and the bottom of the positioning seat 21 has an outer flange 211 to support the second section 102 of the thin-walled component 100. Each bottom clamping module 22 includes a first slider 221, a first support column 222, and a first pressure plate 223. The first slider 221 is slidably inserted into a corresponding groove 11. The first support column 222 is placed on the processing table 1. The two ends of the first pressure plate 223 are respectively pressed onto the outer flange 211 and the first support column 222, and the first pressure plate 223... Bolts 2231 are inserted into the top to connect the first slider 221. Each top pressing module 23 includes a second slider 231, a second support column 232, a second pressure plate 233, and a connecting rod 234. The second slider 231 is slidably inserted into the corresponding slide groove 11. The second support column 232 is placed on the processing table 1. The two ends of the second pressure plate 233 are respectively pressed on the end face of the first section 101 of the thin-walled part 100 and the second support column 232. Both ends of the connecting rod 234 are provided with coaxially arranged first studs 2341. One first stud 2341 is threadedly engaged with the second slider 231, and the other first stud 2341 passes through the second pressure plate 233 and locks the second pressure plate 233 by a nut 2342.
[0044] For the machining fixture for positioning holes on the end face of thin-walled parts provided in this embodiment of the invention, when machining positioning holes 103 on the thin-walled part 100, firstly, the positioning seat 21 is placed on the machining table 1, and the positioning seat 21 is fixed on the machining table 1 by the bottom clamping modules 22. Since the first slider 221 is slidably inserted into the corresponding slide groove 11, and the first support column 222 is placed on the machining table 1, the positions of the first slider 221 and the first support column 222 can be easily adjusted, and the position of the first pressure plate 223 can also be easily adjusted. Thus, the positions of the multiple bottom clamping modules 22 on the machining table 1 can be reasonably adjusted, which facilitates the adaptive pressing of the positioning seat 21. In addition, the two ends of the first pressure plate 223 are respectively pressed onto the outer flange 211 and the first support column 222, thereby achieving reliable pressing and positioning of the positioning seat 21.
[0045] Next, the first segment 101 and the second segment 102 of the thin-walled component 100 are fitted onto the positioning seat 21, and the thin-walled component 100 is pressed onto the positioning seat 21 by multiple top pressing modules 23. On the one hand, fitting the first segment 101 and the second segment 102 of the thin-walled component 100 onto the positioning seat 21 can achieve precise positioning of the thin-walled component 100. Furthermore, since the wall thickness of the first segment 101 of the thin-walled component 100 is relatively large, the insertion length of the first segment 101 of the thin-walled component 100 through the positioning seat 21 is large, which also makes the internal hole support and positioning of the thin-walled component 100 more reliable. On the other hand, since the second slider 231 is slidably inserted into the corresponding slide groove 11 and the second support column 232 is placed on the processing table 1, the positions of the connecting rod 234 and the second support column 232 can be easily adjusted, and the position of the second pressure plate 233 can also be easily adjusted. This allows for reasonable adjustment of the positions of the multiple top pressing modules 23 on the processing table 1, facilitating adaptive pressing of the thin-walled part 100 on the positioning seat 21. Ultimately, this reliably achieves support and positioning of the bottom of the thin-walled part 100 and pressing of the top of the thin-walled part 100. The thin-walled part 100 is subjected to uniform force only in the axial direction, making it less prone to deformation during actual processing. Finally, the positioning hole 103 is machined on the end face of the first section 101 of the thin-walled part 100 using a machine tool.
[0046] In other words, the machining fixture for positioning holes on the end face of thin-walled parts provided in this embodiment of the invention can reliably support and position the bottom of the thin-walled part 100 and press the top of the thin-walled part 100. The thin-walled part 100 is subjected to uniform force only in the axial direction, so that the thin-walled part 100 is not easily deformed during actual processing, thus ensuring the dimensional tolerance and form and position tolerance of the thin-walled part 100.
[0047] It is easy to understand that since the positions of the bottom clamping module 22 and the top clamping module 23 relative to the processing table 1 are adjustable, the position of the thin-walled part 100 can be adjusted to ensure the accuracy between the thin-walled part 100 and the milling cutter on the machine tool.
[0048] For example, there are two bottom clamping modules 22 and two top clamping modules 23, and the two bottom clamping modules 22 and the two top clamping modules 23 are arranged at intervals along the circumference of the processing table 1 to avoid mutual interference.
[0049] In addition, there is a clearance fit between the outer diameter of the positioning seat 21 and the inner diameter of the thin-walled part 100, with a clearance of 0.01-0.05mm.
[0050] Preferably, the axial length of the positioning seat 21 is twice the axial length of the second segment 102.
[0051] In this embodiment, the positioning base 21 has a cutting fluid collection tank 12, which has a conical structure and faces the machining table 1. The diameter of the cutting fluid collection tank 12 gradually decreases. When the thin-walled part 100 is machined, the cutting fluid collection tank 12 can collect the cutting fluid, which is convenient for subsequent processing.
[0052] Furthermore, the positioning seat 21 has a drain hole 13, which is located below and communicates with the cutting fluid collection tank 12. The drain hole 13 can discharge the cutting fluid collected in the cutting fluid collection tank 12, preventing the cutting fluid from accumulating between the inner hole of the thin-walled part 100 and the positioning seat 21.
[0053] In one implementation of the present invention, each top pressing module 23 further includes a third slider 235, which is slidably inserted into the corresponding slide groove 11. A second stud 2351 is provided on the third slider 235, and the top end of the second stud 2351 is threadedly engaged with the second support column 232.
[0054] In the above embodiment, the connection between the third slider 235 and the second support column 232 is achieved by the second stud 2351, which can avoid the problem of the second support column 232 moving or tilting due to its high center of gravity when pressing the top surface of the thin-walled part 100, and increase the reliability of the arrangement of the second support column 232 on the processing table 1.
[0055] In addition, the first pressure plate 223 and the second pressure plate 233 have slotted holes, in which the bolt 2231 and the first stud 2341 can be movably inserted. The slotted holes allow for easy adjustment of the position of the bolt 2231 or the first stud 2341 relative to the first pressure plate 223 or the second pressure plate 233, reducing movement of the first pressure plate 223 and the second pressure plate 233 during the tightening process (i.e., only the bolt 2231 or the first stud 2341 needs to be moved).
[0056] See also Figure 2 The slide 11 has a T-shaped or dovetail-shaped structure, which can effectively prevent the first slider 221, the second slider 231 and the third slider 235 from detaching from the processing table 1 in the vertical direction.
[0057] In this embodiment, the end of each first pressure plate 223 facing the outer flange 211 and the end of each second pressure plate 233 facing away from the second support column 232 are both tapered structures, which can effectively compensate for the height difference between the first pressure plate 223 and the outer flange 211 or the height difference between the second pressure plate 233 and the top surface of the thin-walled member 100, thereby facilitating the pressing of the outer flange 211 or the thin-walled member 100.
[0058] For example, both the second support column 232 and the connecting rod 234 are steel structures, and the diameter of the second support column 232 is larger than the diameter of the connecting rod 234. The second support column 232 has high support strength and can reliably support the second pressure plate 233.
[0059] Figure 4 This is a flowchart of a processing method for positioning holes on the end face of a thin-walled part, provided by an embodiment of the present invention. Figure 4 As shown, this processing method is based on the aforementioned processing fixture, and the processing method includes:
[0060] S1. Place the positioning seat 21 on the processing table 1, and fix the positioning seat 21 on the processing table 1 by pressing the bottom clamping module 22.
[0061] It should be noted that when the positioning seat 21 is installed, the drain hole 13 is basically aligned with the slide groove 11 of the processing table 1, so that the coolant passing through the center of the thin-walled part during the processing will not accumulate at the center of the thin-walled part, and can quickly flow into the equipment for circulation.
[0062] S2. The first segment 101 and the second segment 102 of the thin-walled component 100 are fitted onto the positioning seat 21, and the thin-walled component 100 is pressed onto the positioning seat 21 by multiple top pressing modules 23.
[0063] It should be noted that when pressing the thin-walled part 100, first use a small amount of force to gently press it onto the thin-walled part 100, and then use the tool to press the part evenly and repeatedly from left to right.
[0064] S3. The positioning hole 103 is machined on the end face of the first section 101 of the thin-walled part 100 by a machine tool.
[0065] The specific steps are as follows:
[0066] S31. Use a center drill to position and machine the positioning hole 103 to be machined, so as to ensure that the position and size of the hole to be machined in the future will not be offset.
[0067] S32. Use a drill bit 0.3mm smaller than the locating hole 103 to perform drilling to remove most of the residual material inside the hole.
[0068] S33. Use a drill bit 0.1mm smaller than the locating hole 103 to enlarge the hole, so that a small amount of allowance is left on the side wall of the hole to prepare for boring.
[0069] S34. Use a boring bar to bore the positioning hole 103. Use the fine-tuning knob on the side of the boring bar to bore to the final size.
[0070] S35. Use a chamfering tool to remove excess burrs from the hole opening.
[0071] S36. Remove and clean the parts.
[0072] It should be noted that, due to the high height of the parts after installation, during the machining process, operations such as machining positioning holes, drilling, reaming, and boring may be involved. Directly changing the tool at the end of these operations could cause collisions with the parts and the fixture. Therefore, each time the robot changes the tool, it should be moved horizontally in the X direction to a suitable position according to the height of the equipment to avoid interference during the tool changing process.
[0073] After step S3, the processing method further includes:
[0074] S4. At the end of the program, set the tool holder for alignment to be switched to the spindle in advance, and add the M00 unconditional pause command after it. Then follow it with the workpiece coordinate system zero point position movement command. This allows the workpiece to be quickly moved to the coordinate system position after the part is changed, and then fine-tuning can be done after alignment.
[0075] The purpose of step S4 is to save auxiliary time and reduce labor intensity.
[0076] The present invention provides a method for machining positioning holes on the end face of a thin-walled part, which can reliably achieve support and positioning of the bottom of the thin-walled part 100 and pressing of the top of the thin-walled part 100. The thin-walled part 100 is subjected to uniform force only in the axial direction, so that the thin-walled part 100 is not easily deformed during actual machining, thus ensuring the dimensional tolerance and form and position tolerance of the thin-walled part 100.
[0077] Furthermore, prior to step S3, the processing method further includes:
[0078] S21. Install the first adjusting rod 3 on the machine tool spindle tool holder, and provide the second adjusting rod 4 and the dial indicator. Install the dial indicator on the second adjusting rod 4, and install the second adjusting rod 4 on the first adjusting rod 3.
[0079] For example, the second adjusting lever 4 and the first adjusting lever 3 are connected by a screw 5, the screw 5 being of size M5 (see...). Figure 5 ).
[0080] S22. When the dial indicator's pointer is inside the machine tool's worktable, use the principle of plane mirror reflection to perform scale calibration and fine-tuning to ensure that the center of the thin-walled part is aligned within ±0.005mm.
[0081] S23. Disassemble the first adjusting rod 3 and the second adjusting rod 4, replace the milling cutter, and machine the positioning hole 103.
[0082] In the above embodiments, the first adjusting rod 3, the second adjusting rod 4 and the dial indicator can be used to conveniently center the thin-walled part 100, thereby accurately determining its center and ensuring the machining accuracy of the positioning hole 103.
[0083] It should be noted that this machining fixture is particularly suitable for machining positioning holes 103 of various sizes on the end face of thin-walled parts 100. Because this machining fixture provides reliable support and positioning, it is not only convenient to machine different sizes on the end face of thin-walled parts 100, but also can effectively guarantee the dimensional tolerances and geometric tolerances of thin-walled parts 100.
[0084] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A machining fixture for positioning holes on the end face of thin-walled parts, characterized in that, The machining fixture includes a machining table (1) and a positioning component (2); The processing table (1) has a plurality of spaced slides (11), each of which extends along a first direction; The positioning assembly (2) includes a positioning seat (21), multiple bottom clamping modules (22) and multiple top clamping modules (23). The positioning seat (21) is placed on the processing table (1). The top of the positioning seat (21) is used to insert into the inner holes of the first section (101) and the second section (102) of the thin-walled part (100). The bottom of the positioning seat (21) has an outer flange (211) to support the second section (102) of the thin-walled part (100). Each bottom clamping module (22) includes a first slider (221), a first support column (222) and a first pressure plate (223). The first slider (221) is slidably inserted into the corresponding slide groove (11). The first support column (222) is placed on the processing table (1). The two ends of the first pressure plate (223) are respectively pressed on the outer flange (211) and the first support column (222). (223) is fitted with bolts (2231) to connect the first slider (221). Each of the top pressing modules (23) includes a second slider (231), a second support column (232), a second pressure plate (233) and a connecting rod (234). The second slider (231) is slidably inserted into the corresponding slide groove (11). The second support column (232) is placed on the processing table (1). The two ends of the second pressure plate (233) are respectively pressed on the end face of the first section (101) of the thin-walled part (100) and the second support column (232). Both ends of the connecting rod (234) are provided with coaxially arranged first studs (2341). One first stud (2341) is threadedly engaged with the second slider (231). The other first stud (2341) passes through the second pressure plate (233) and locks the second pressure plate (233) with a nut (2342). The positioning seat (21) has a cutting fluid collection tank (12), which is a conical structure and faces the machining table (1). The diameter of the cutting fluid collection tank (12) gradually decreases. The positioning seat (21) has a drain hole (13), which is located below the cutting fluid collection tank (12) and communicates with the cutting fluid collection tank (12); Each of the top clamping modules (23) further includes a third slider (235), which is slidably inserted into the corresponding slide groove (11). A second stud (2351) is provided on the third slider (235), and the top end of the second stud (2351) is threadedly engaged with the second support column (232). The first pressure plate (223) and the second pressure plate (233) have strip-shaped holes, and the bolt (2231) and the first stud (2341) are movably inserted into the corresponding strip-shaped holes.
2. The machining fixture for positioning holes on the end face of thin-walled parts according to claim 1, characterized in that, The groove (11) is a T-shaped structure or a dovetail-shaped structure.
3. The machining fixture for positioning holes on the end face of thin-walled parts according to claim 1, characterized in that, The end of each of the first pressure plates (223) facing the outer flange (211) and the end of each of the second pressure plates (233) facing away from the second support column (232) are both tapered structures.
4. The machining fixture for positioning holes on the end face of thin-walled parts according to claim 1, characterized in that, The second support column (232) and the connecting rod (234) are both steel structures, and the diameter of the second support column (232) is larger than the diameter of the connecting rod (234).
5. A method for machining positioning holes on the end face of a thin-walled part, characterized in that, The processing method is based on the processing fixture according to any one of claims 1-4, and the processing method includes: The positioning seat (21) is placed on the processing table (1), and the positioning seat (21) is fixed on the processing table (1) by a plurality of bottom clamping modules (22); The first section (101) and the second section (102) of the thin-walled component (100) are fitted onto the positioning seat (21), and the thin-walled component (100) is pressed onto the positioning seat (21) by a plurality of the top pressing modules (23); The positioning hole (103) is machined on the end face of the first section (101) of the thin-walled part (100) using a machine tool.
6. A method for machining positioning holes on the end face of a thin-walled part according to claim 5, characterized in that, Before machining the positioning hole (103) on the end face of the first segment (101) of the thin-walled part (100) using a machine tool, the machining method further includes: Install the first adjusting rod (3) on the machine tool spindle tool holder, and provide the second adjusting rod (4) and the dial indicator. Install the dial indicator on the second adjusting rod (4) and install the second adjusting rod (4) on the first adjusting rod (3). When the dial indicator's pointer is inside the machine tool's worktable, the scale is calibrated and fine-tuned using the principle of plane mirror reflection to ensure that the center of the thin-walled part is aligned within ±0.005mm. Disassemble the first adjusting rod (3) and the second adjusting rod (4), replace the milling cutter, and machine the positioning hole (103).