A CNC machining tool for milling the edges of semi-circular thin-walled parts

Abstract

This application relates to a CNC machining tool for milling the edges of semi-circular thin-walled parts, belonging to the field of machining equipment. It includes a spatial moving frame, a workpiece, a positioning component, a base, and fasteners. The base has a semi-cylindrical surface on which the thin-walled part can be fitted, exposing the excess unprocessed portion on both sides of the main body of the thin-walled part. The fasteners can fix the thin-walled part on the semi-cylindrical surface. The spatial moving frame can connect to the workpiece and the positioning component, and can drive the workpiece and the positioning component to work. The workpiece can remove the unprocessed portion, and the positioning component can locate the end point of the workpiece's processing, thus distinguishing the main body of the thin-walled part from the unprocessed portion. This application reduces the process conversion and positioning errors caused by the separation of scribing and cutting in the prior art, which is beneficial to improving the machining accuracy and stability of semi-circular thin-walled parts.

Description

Technical Field

[0001] This application relates to the field of machining equipment, and in particular to a CNC machining tool for milling the edges of semi-circular thin-walled parts. Background Technology

[0002] Semi-circular thin-walled parts are widely used in machining, cylinder assembly, and related structural component manufacturing. For these parts, the sheet metal is typically first machined into an arc shape, and then the edges of the arc shape are trimmed to form a dimensionally accurate, regularly shaped semi-cylindrical structure, thus meeting the requirements for subsequent assembly, splicing, or welding. Because these workpieces have thin walls and poor overall rigidity, they are easily deformed by external forces during processing. Therefore, the accuracy of edge trimming and the stability of the machining process have a significant impact on the final product quality.

[0003] In existing technologies, the manufacturing of thin-walled cylindrical tubes or semi-circular thin-walled parts typically employs a process of forming first and then trimming. Specifically, a straight plate is first bent to form an arc-shaped plate. To ensure the bending quality of the arc-shaped plate and to allow for subsequent trimming, the central angles corresponding to the two ends of the arc-shaped plate used for splicing are usually set to greater than 180°, thus forming a superior arc structure. Subsequently, a semi-circular base block adapted to the target semi-cylinder is placed on a tooling table. The arc-shaped plate is then placed against the surface of this base block and pressed and fixed by an extruder, ensuring the arc-shaped plate fits as closely as possible to the outside of the base block. Afterward, the operator typically uses the end position of the base block as a reference to mark the alignment with the end of the base block. Then, a cutting mechanism is used to remove the excess portion from both ends of the arc-shaped plate along the marked lines, ultimately forming a standard semi-cylindrical structure.

[0004] In existing technologies, scribing and cutting are usually two separate processes with many process transitions. Furthermore, the determination of the trimming endpoint through scribing is essentially an indirect positioning based on the outline of the base block. This lack of direct detection of the actual spatial position and true outline of the curved plate makes it difficult to achieve precise control over the actual processing endpoint, thus leading to a reduction in processing accuracy and stability. Summary of the Invention

[0005] In order to achieve precise control over the actual machining endpoint and improve the machining accuracy and stability of semi-circular thin-walled parts, this application provides a CNC machining tool for milling the edges of semi-circular thin-walled parts.

[0006] The CNC machining tool for milling semi-circular thin-walled parts provided in this application adopts the following technical solution: A CNC machining tool for milling the edges of a semi-circular thin-walled part includes a spatial moving frame, a machining part, a positioning part, a base, and fasteners. The base has a semi-cylindrical surface, and the thin-walled part can fit against the semi-cylindrical surface to expose the excess unprocessed portion on both sides of the main body of the thin-walled part. The fasteners can fix the thin-walled part set on the semi-cylindrical surface. The spatial moving frame can be connected to the machining part and the positioning part, and can drive the machining part and the positioning part to work. The machining part can remove the unprocessed portion, and the positioning part can locate the end point of the machining of the machining part to distinguish the main body of the thin-walled part from the unprocessed portion.

[0007] By adopting the above technical solution, the semi-cylindrical surface of the base is used to support and position the thin-walled part, and fasteners are used to fix the thin-walled part, so that the main body of the thin-walled part fits against the semi-cylindrical surface while the parts to be processed on both sides are exposed, which facilitates the subsequent processing of the parts to be processed. At the same time, by driving the positioning part and the processing part through the spatial moving frame, the processing end point can be determined first, and then the parts to be processed can be removed. This combines the processing end point positioning with the edge removal process, reducing the process conversion and positioning errors caused by the separation of scribing and cutting in the prior art, which is conducive to improving the processing accuracy and processing stability of the semi-circular thin-walled part.

[0008] Preferably, the workpiece includes a mounting base and a cutting tool. The mounting base is rotatably mounted on the spatial moving frame. The mounting base is externally connected to a rotary drive mechanism. The cutting tool can be mounted on the mounting base so that the cutting tool can remove the part to be processed.

[0009] By adopting the above technical solution, the rotary drive mechanism can drive the tool to rotate, thereby cutting and removing the parts to be processed on both sides of the thin-walled part, which facilitates stable processing of the parts to be processed and improves the removal efficiency and processing quality of the edges of the thin-walled part.

[0010] Preferably, the positioning element includes a displacement sensor, which can detect the actual boundary position of the thin-walled part when it is close to the thin-walled part, and output a detection signal for determining the processing end point.

[0011] By adopting the above technical solution, the displacement sensor can directly detect the actual boundary position of the thin-walled part, rather than relying on the base contour for indirect judgment. This allows for more accurate determination of the machining end point, improves the control accuracy of the machining end point, and helps reduce machining deviations caused by workpiece clamping errors or contour errors.

[0012] Preferably, both the cutting tool and the displacement sensor can be connected to the mounting base, so that the cutting tool and the displacement sensor share the mounting base as a mounting point.

[0013] By adopting the above technical solution, a more direct correspondence can be established between the detection reference of the displacement sensor and the machining reference of the tool. This helps to reduce the relative error caused by the separate installation of the positioning component and the workpiece, improve the consistency between the positioning result and the actual machining position, and further improve the machining accuracy.

[0014] Preferably, the fastener includes a first linear drive mechanism and a pressure block. The first linear drive mechanism is connected to the pressure block, and the first linear drive mechanism can drive the pressure block to press the thin-walled part against the semi-cylindrical surface.

[0015] By adopting the above technical solution, the first linear drive mechanism can drive the pressure block to actively press the thin-walled part, so that the thin-walled part is stably attached to the semi-cylindrical surface, thereby improving the clamping stability of the thin-walled part during the processing and reducing the possibility of the thin-walled part shifting or vibrating during the processing.

[0016] Preferably, the pressure block is provided with an arc-shaped surface that can contact the thin-walled part, and the arc-shaped surface is adapted to the thin-walled part.

[0017] By adopting the above technical solution, the arc-shaped surface can form a larger contact area with the thin-walled part, making the pressure distribution of the pressure block on the thin-walled part more uniform. This helps to reduce the risk of deformation caused by excessive local stress on the thin-walled part, and improves the clamping quality and processing stability.

[0018] Preferably, the fastener includes a fixing body and a pressurizing mechanism. The fixing body is disposed opposite to the semi-cylindrical surface. A hydraulic cavity is formed inside the fixing body. A plurality of function holes are formed on the side of the fixing body facing the semi-cylindrical surface. Each function hole is connected to the hydraulic cavity. An elastic body is provided in each function hole of the fixing body. The elastic body can block the function hole. The hydraulic cavity is filled with hydraulic medium. The pressurizing mechanism can pressurize the hydraulic medium in the hydraulic cavity and transmit the pressure to the thin-walled part through the elastic body.

[0019] By adopting the above technical solution, the pressurizing mechanism can apply pressure to the hydraulic medium and transmit the pressure to the surface of the thin-walled part through multiple working holes and elastic bodies. On the one hand, this allows the clamping force to act on the thin-walled part in a more flexible manner, thereby improving the uniformity of force on the thin-walled part and reducing the risk of local crushing or deformation caused by rigid clamping. On the other hand, by setting multiple elastic bodies, the effective area for fixing the thin-walled part can be increased, resulting in a better fit between the thin-walled part and the semi-cylindrical surface, thereby reducing the installation error of the thin-walled part and improving the accuracy of the processing of the thin-walled part.

[0020] Preferably, the fixing body is provided with N partitions in the hydraulic cavity, the N partitions divide the hydraulic cavity into N+1 hydraulic channels arranged in the vertical direction, and the plurality of actuating holes are divided into N+1 groups in the vertical direction, with one group of actuating holes corresponding to one group of hydraulic channels.

[0021] By adopting the above technical solution, the hydraulic chamber is divided into multiple hydraulic channels, and different groups of working holes can correspond to different hydraulic channels, which facilitates the implementation of zoned pressurization on different vertical areas of the thin-walled part, improves the adjustability and targeting of the clamping force distribution, and makes it more adaptable to the force requirements of different positions of the thin-walled part; by setting multiple hydraulic channels, it is possible to avoid the elastic body at the bottom being affected by the large static pressure of the hydraulic medium, which would lead to excessive extrusion pressure on the thin-walled part, thereby improving the uniformity of the force exerted by the elastic body on the thin-walled part.

[0022] Preferably, the pressurizing mechanism includes a pressurizing part, a pressurizing piston, and a drive rod. The pressurizing part has pressurizing chambers that correspond one-to-one with the hydraulic channels. Each pressurizing chamber is connected to the hydraulic channel through a central hole. The pressurizing piston corresponds one-to-one with the pressurizing chamber. The pressurizing piston is disposed in the pressurizing chamber and can press the hydraulic medium in the pressurizing chamber into the hydraulic channel and draw the hydraulic medium in the hydraulic channel into the pressurizing chamber.

[0023] By adopting the above technical solution, the pressurizing piston can pressurize or recover the hydraulic medium in each hydraulic channel, thereby facilitating the adjustment of the clamping pressure in the corresponding area of ​​each hydraulic channel and improving the controllability, flexibility and adaptability of the hydraulic clamping structure.

[0024] Preferably, the tooling table is provided with a second linear drive mechanism, which is connected to the fixed body so as to drive the fixed body to move closer to or away from the semi-cylindrical surface.

[0025] By adopting the above technical solution, the second linear drive mechanism can drive the fixed body to move closer to or away from the semi-cylindrical surface, thereby facilitating the fixed body to move closer to the thin-walled part when clamping the workpiece and to move the fixed body away from the thin-walled part when picking up or placing the workpiece, improving the convenience of equipment clamping and unloading operations, and helping to improve processing efficiency.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. This application detects the actual boundary position of the thin-walled part by setting a positioning component, and determines the processing end point of the processed part accordingly. It combines the positioning of the processing end point with the removal process of the part to be processed, which reduces the process conversion and positioning error caused by the separation of scribing and cutting in the prior art. This is conducive to achieving precise control of the actual processing end point and improving the processing accuracy and processing stability of the semi-circular thin-walled part. 2. By setting up a base, fasteners, and a clamping structure adapted to the thin-walled part, this application enables the thin-walled part to be stably attached to the semi-cylindrical surface. By using flexible or uniform clamping, the fixing area of ​​the thin-walled part is increased and the uniformity of force is improved, thereby reducing the risk of installation errors, local crushing, deformation, displacement, or vibration of the thin-walled part during clamping and processing, and further improving the clamping quality and processing accuracy of the thin-walled part. 3. By setting up a hydraulic chamber, multiple elastic bodies, multiple hydraulic channels, and corresponding pressurization mechanisms, this application can implement zoned pressurization on different areas of thin-walled parts and reduce the influence of the static pressure difference of the hydraulic medium on the force of the lower elastic body. This improves the adjustability, targeting, and uniformity of the clamping force distribution in each area, making the hydraulic clamping structure more controllable, flexible, and adaptable, and is conducive to improving the processing quality and usage effect of the equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a CNC machining tool for milling the edge of a semi-circular thin-walled part according to Embodiment 1 of this application.

[0028] Figure 2 yes Figure 1 Enlarged view of section A.

[0029] Figure 3 This is a structural diagram used to demonstrate the positioning component.

[0030] Figure 4 It is a structural schematic diagram used to demonstrate the fit between a thin-walled component and a base.

[0031] Figure 5 yes Figure 1 Enlarged view of section B in the middle.

[0032] Figure 6 This is a schematic diagram of the fastener structure of Embodiment 2 of this application.

[0033] Figure 7 yes Figure 6 The top view in the image.

[0034] Figure 8 It is along Figure 7 A cross-sectional view of the CC line.

[0035] Figure 9 It is a structural schematic diagram used to illustrate the arrangement of elastic bodies on a fixed body.

[0036] Figure 10 It is along Figure 7 A cross-sectional view of the DD line.

[0037] Explanation of reference numerals in the attached drawings: 1. Thin-walled component; 21. Base; 22. Tooling table; 23. Mounting frame; 3. Spatial moving frame; 31. Sliding frame; 4. Machining part; 41. Mounting seat; 42. Tool; 43. Rotating base; 5. Positioning component; 51. Displacement sensor; 6. Base; 61. Semi-cylindrical surface; 7. Fastener; 711. First linear drive mechanism; 712. Pressure block; 713. Arc-shaped surface; 721. Fixing body; 722. Pressurizing mechanism; 723. Second linear drive mechanism; 724. Hydraulic chamber; 725. Partition; 726. Hydraulic channel; 727. Actual hole; 728. Pressurizing part; 729. Pressurizing piston; 730. Drive rod; 731. Intermediate hole; 732. Elastic body; 733. Pressurizing chamber. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0039] This application provides a CNC machining tool for milling the edges of semi-circular thin-walled parts. It is mainly used to trim the edges of thin-walled parts 1 that have been bent to form a superior arc structure, removing excess portions on both sides of the main body to form a standard semi-circular thin-walled part 1. This CNC machining tool can detect the actual boundary position of the thin-walled part 1 while it is clamped, determine the machining end point accordingly, and then mill away the portions to be processed, thereby improving the accuracy of the actual machining endpoint control and the machining stability of the semi-circular thin-walled part 1. Example 1

[0040] Reference Figure 1 , Figure 2 and Figure 3 This embodiment provides a CNC machining tool for milling the edge of a semi-circular thin-walled part, including a spatial moving frame 3, a machining part 4, a positioning part 5, a base 6, and fasteners 7, all mounted on a base 21.

[0041] In this embodiment, the spatial moving frame 3 adopts a gantry-type moving frame combined with a multi-axis CNC moving mechanism to realize three-dimensional spatial movement in the X, Y, and Z directions. This enables the workpiece 4 and the positioning component 5 to move to a predetermined position in space to meet the needs of positioning and processing the parts to be processed on both sides of the thin-walled part 1. The CNC moving mechanism of each direction axis consists of a servo motor, a lead screw module, a linear guide rail, and a sliding frame 31 to realize movement on the corresponding direction axis.

[0042] In this embodiment, the workpiece 4 includes a mounting base 41 and a cutting tool 42. A rotating base 43 is fixedly mounted on a sliding frame 31 that slides along the X-axis in the spatial moving frame 3. A rotating drive mechanism is provided on the rotating base 43. In this embodiment, the rotating drive mechanism is a rotary motor. The mounting base 41 is rotatably mounted on the rotating base 43. The output shaft of the rotary motor is connected to the mounting base 41, so that the rotary motor drives the mounting base 41 to rotate. The mounting base 41 is used to mount the cutting tool 42, and different specifications of cutting tools 42 can be replaced according to different processing requirements. The cutting tool 42 is preferably a milling cutter, such as any one of an end mill, a face mill, or a milling cutter, so as to mill and remove the parts to be processed on both sides of the thin-walled workpiece 1.

[0043] In this embodiment, the positioning element 5 includes a displacement sensor 51. The displacement sensor 51 can detect the actual boundary position of the thin-walled part 1 when it is close to the thin-walled part 1, and output a detection signal for determining the processing end point. The displacement sensor 51 includes, but is not limited to, one of a laser displacement sensor 51, a photoelectric sensor, an inductive proximity sensor, and a contact probe. In this embodiment, the displacement sensor 51 is preferably a non-contact laser displacement sensor 51 to reduce the possibility of additional force being applied to the thin-walled part 1 during the detection process.

[0044] In this embodiment, both the cutting tool 42 and the displacement sensor 51 can be connected to the mounting base 41, allowing them to share the mounting base 41 as a mounting point. Specifically, the mounting base 41 may be provided with a tool holder interface for mounting the cutting tool 42, and mounting holes, a clamping part, or a quick-change connection part for mounting the displacement sensor 51. By allowing the cutting tool 42 and the displacement sensor 51 to share the same mounting base 41, a relatively stable reference correspondence can be established between the sensor detection position and the actual machining position of the cutting tool 42, thereby reducing the relative position error caused by separate installation and improving the consistency between the positioning result and the machining result.

[0045] Reference Figure 1 , Figure 4 The base 6 is fixedly installed on the tooling table 22. In this embodiment, the base 6 is half of a semi-cylindrical tube placed along the Z direction, so that the outer peripheral side of the base 6 forms a semi-cylindrical surface 61. When the thin-walled component 1 is installed on the base 6, the thin-walled component 1 fits against the semi-cylindrical surface 61, so that the excess unprocessed parts on both sides of the main body of the thin-walled component 1 are exposed from the side of the base 6 near the space moving frame 3.

[0046] Reference Figure 1 , Figure 5The tooling table 22 is provided with a mounting bracket 23. There are multiple sets of fasteners 7, all of which are mounted on the mounting bracket 23 and are evenly arranged along the circumference of the base 6. In this embodiment, the fasteners 7 include a first linear drive mechanism 711 and a pressure block 712. The first linear drive mechanism 711 can be one of the linear actuators such as a cylinder, electric push rod, lead screw slide, or hydraulic cylinder. In this application, the first linear drive mechanism 711 is preferably a hydraulic cylinder. The output shaft of each first linear drive mechanism 711 is arranged opposite to the semi-cylindrical surface 61. The pressure block 712 corresponds to each first linear drive mechanism 711 and is fixedly installed on the output shaft of each first linear drive mechanism 711. In order to reduce the hard contact between the pressure block 712 and the thin-walled part 1, the pressure block 712 in this embodiment is made of rubber.

[0047] To increase the contact area between the pressure block 712 and the thin-walled component 1, an arc-shaped surface 713 is provided on the side of the pressure block 712 facing the semi-cylindrical surface 61, which can contact the thin-walled component 1. The arc-shaped surface 713 is adapted to the thin-walled component 1, and the curvature of the arc-shaped surface 713 can be adapted to the outer surface of the thin-walled component 1, thereby forming a larger contact area when pressing, making the pressure applied by the pressure block 712 on the thin-walled component 1 more uniform. Through this setting, the risk of indentation, warping or local deformation of the thin-walled component 1 due to excessive local pressure can be reduced.

[0048] First, the thin-walled part 1 to be processed is placed on the semi-cylindrical surface 61 of the base 6, so that the main body of the thin-walled part 1 is attached to the semi-cylindrical surface 61, while the excess parts to be processed on both sides of the main body are exposed on both sides of the semi-cylindrical surface 61. Since the thin-walled part 1 to be processed is usually a curved structure, its two ends have excess parts compared with the standard semi-circular structure, and these excess parts are the parts to be processed.

[0049] Subsequently, the first linear drive mechanism 711 is activated, driving the pressure block 712 to move towards the thin-walled part 1, and pressing the arc-shaped surface 713 of the pressure block 712 onto the surface of the thin-walled part 1, thereby stably pressing the thin-walled part 1 onto the semi-cylindrical surface 61. At this time, the contact state between the main body of the thin-walled part 1 and the semi-cylindrical surface 61 is relatively stable, providing a reliable clamping basis for subsequent positioning and milling operations.

[0050] After the thin-walled part 1 is fixed, the displacement sensor 51 is installed on the mounting base 41. The space moving frame 3 drives the displacement sensor 51 to move along the Y-axis. The displacement sensor 51 can move from both sides of the thin-walled part 1 toward the center. When the displacement sensor 51 detects a position change corresponding to the boundary of the thin-walled part 1, it outputs a detection signal, and the CNC system determines the end point of the machining of the workpiece 4 based on this signal. Since the end point of the machining is determined based on the actual boundary position of the thin-walled part 1 in the current clamping state, it can more accurately reflect the true boundary position between the body of the thin-walled part 1 and the part to be processed compared with the indirect positioning method that relies on the outline scribing of the reference block in the prior art.

[0051] After the machining end point is determined, the displacement sensor 51, originally installed on the mounting base 41, is removed and replaced with the cutting tool 42. Subsequently, the spatial moving frame 3 drives the workpiece 4 to move to the position of the part to be processed, while the rotary motor drives the cutting tool 42 to rotate, milling the parts to be processed on both sides of the thin-walled part 1. During the milling process, the cutting tool 42 gradually removes the part to be processed along a predetermined trajectory, and stops cutting inward when it reaches the machining end point determined by the positioning element 5, thereby completing the trimming of the edge of the thin-walled part 1, so that the thin-walled part 1 forms a standard semi-circular structure.

[0052] The implementation principle of Example 1 is as follows: by first positioning and then milling, the determination of the machining endpoint is combined with the removal process of the part to be processed, thereby reducing the error accumulation problem caused by scribing, process conversion, and re-cutting in the prior art. Furthermore, since the positioning component 5 detects the actual boundary position of the thin-walled part 1, the control accuracy of the machining endpoint can be improved, thereby improving the machining accuracy and machining stability of the semi-circular thin-walled part 1. Example 2

[0053] Reference Figure 6 , Figure 7 The difference between this embodiment and Embodiment 1 is that the fastener 7 in this embodiment includes a fixing body 721 and a pressurizing mechanism 722. The fixing body 721 is a semi-cylindrical structure arranged parallel to the base 6 and opposite to the semi-cylindrical surface 61 on the base 6. The fixing body 721 is slidably connected to the tooling table 22 via a slide rail pair. The tooling table 22 is provided with a second linear drive mechanism 723. In this embodiment, the second linear drive mechanism 723 is a hydraulic cylinder. The output shaft of the second linear drive mechanism 723 is connected to the fixing body 721, so that the fixing body 721 can move closer to or further away from the base 6.

[0054] Reference Figure 7 , Figure 8The fixed body 721 has a hydraulic cavity 724. The fixed body 721 has N partitions 725 in the hydraulic cavity 724, where N is a positive integer. In this embodiment, N=2 is taken as an example, which corresponds to two partitions 725. The two partitions 725 are arranged at intervals along the vertical direction. The two partitions 725 divide the hydraulic cavity 724 into three independent hydraulic channels 726, which are upper, middle and lower. Each hydraulic channel 726 is arranged along the circumference of the fixed body 721.

[0055] Reference Figure 8 , Figure 9 The fixing body 721 has several working holes 727 on the side facing the semi-cylindrical surface 61. In this embodiment, the working holes 727 are divided into three groups, and each group of working holes 727 corresponds to a hydraulic channel 726. The working holes 727 in each group are connected to the corresponding hydraulic channel 726 and are arranged along the trajectory direction of the hydraulic channel 726. An elastic body 732 is fixedly installed in each working hole 727 of the fixing body 721. In this embodiment, the elastic body 732 is a rubber layer. The elastic body 732 covers the working hole 727 and seals it.

[0056] Reference Figure 7 , Figure 10 In this embodiment, the pressurizing mechanism 722 includes a pressurizing part 728, a pressurizing piston 729, and a drive rod 730. The pressurizing part 728 is mounted on the fixed body 721 and integrally formed with the fixed body 721. The pressurizing part 728 has pressurizing chambers 733 corresponding to the hydraulic channels 726. In this embodiment, there are three pressurizing chambers 733, and the three pressurizing chambers 733 are independent of each other. The pressurizing piston 729 corresponds to the pressurizing chambers 733. The pressurizing piston 729 is disposed in the pressurizing chamber 733 and is slidably sealed to the pressurizing part 728. The fixed body 721 has intermediate holes 731 corresponding to the pressurizing chambers 733. One end of the intermediate hole 731 communicates with the hydraulic channel 726, and the other end communicates with the space below the pressurizing piston 729 in the pressurizing chamber 733. Each hydraulic channel 726 and the corresponding communicating pressurizing chamber 733 are filled with hydraulic medium. In this embodiment, the hydraulic medium is hydraulic oil.

[0057] A drive rod 730 is vertically inserted into three pressure chambers 733 and fixedly connected to three pressure pistons 729. The drive rod 730 is slidably sealed to the pressure section 728, allowing the drive rod 730 to drive the three pressure pistons 729 to move. The area of ​​the pressure chamber 733 above the pressure pistons 729 communicates with the outside through a through hole. A hydraulic cylinder is mounted on the fixed body 721, facing downwards. The output shaft of the hydraulic cylinder is connected to the drive rod 730, causing the hydraulic cylinder to drive the drive rod 730 to move.

[0058] The implementation principle of Example 2 is as follows: First, the thin-walled part 1 to be processed is placed on the semi-cylindrical surface 61 of the base 6, so that the main body of the thin-walled part 1 is in contact with the semi-cylindrical surface 61, and the part to be processed is exposed on both sides. Then, the second linear drive mechanism 723 drives the fixing body 721 to move towards the thin-walled part 1, so that the multiple elastic bodies 732 on the fixing body 721 approach the thin-walled part 1. Next, the hydraulic cylinder presses down the drive rod 730, so that the pressurizing piston 729 presses the hydraulic medium in the pressurizing chamber 733 into the hydraulic channel 726. The hydraulic medium pushes the elastic bodies 732 in each working hole 727 to bulge outward and press against the surface of the thin-walled part 1. Since the multiple elastic bodies 732 are distributed and can be zoned and adjusted through multiple hydraulic channels 726, the thin-walled part 1 can be pressed onto the semi-cylindrical surface 61 in a more uniform and flexible manner.

[0059] This embodiment replaces the single rigid clamping block 712 with a hydraulic flexible clamping structure, which improves the adaptability to the surface of the thin-walled part 1 and makes the force on the thin-walled part 1 more uniform during clamping. This helps to reduce installation errors and the risk of local pressure damage and deformation. Especially when the thin-walled part 1 is large in size, thin in wall thickness, or has certain discrete differences in surface shape, the hydraulic flexible clamping structure can better ensure the fit between the thin-walled part 1 and the semi-cylindrical surface 61, thereby further improving the accuracy of subsequent positioning and processing.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A CNC machining tool for milling the edges of semi-circular thin-walled parts, characterized in that: The device includes a space moving frame (3), a processing part (4), a positioning part (5), a base (6), and a fastener (7). The base (6) has a semi-cylindrical surface (61), and the thin-walled part (1) can fit against the semi-cylindrical surface (61) so that the excess unprocessed parts on both sides of the main body of the thin-walled part (1) are exposed. The fastener (7) can fix the thin-walled part (1) set on the semi-cylindrical surface (61). The spatial moving frame (3) can be connected to the processing part (4) and the positioning part (5), and can drive the processing part (4) and the positioning part (5) to work. The processing part (4) can remove the part to be processed, and the positioning part (5) can position the end point of the processing of the processing part (4) so ​​as to distinguish the body of the thin-walled part (1) from the part to be processed.

2. The CNC machining tool for milling the edge of a semi-circular thin-walled part according to claim 1, characterized in that: The workpiece (4) includes a mounting base (41) and a cutting tool (42). The mounting base (41) is rotatably mounted on the spatial moving frame (3). The mounting base (41) is externally connected to a rotation drive mechanism. The cutting tool (42) can be mounted on the mounting base (41) so that the cutting tool (42) can remove the part to be processed.

3. The CNC machining tool for milling the edge of a semi-circular thin-walled part according to claim 2, characterized in that: The positioning element (5) includes a displacement sensor (51), which is capable of detecting the actual boundary position of the thin-walled part (1) when it is close to the thin-walled part (1) and outputting a detection signal for determining the end point of processing.

4. The CNC machining tool for milling the edge of a semi-circular thin-walled part according to claim 3, characterized in that: Both the cutting tool (42) and the displacement sensor (51) can be connected to the mounting base (41), so that the cutting tool (42) and the displacement sensor (51) share the mounting base (41) as the mounting point.

5. The CNC machining tool for milling the edge of a semi-circular thin-walled part according to claim 1, characterized in that: The fastener (7) includes a first linear drive mechanism (711) and a pressure block (712). The first linear drive mechanism (711) is connected to the pressure block (712). The first linear drive mechanism (711) can drive the pressure block (712) to press the thin-walled member (1) against the semi-cylindrical surface (61).

6. The CNC machining tool for milling the edge of a semi-circular thin-walled part according to claim 5, characterized in that: The pressure block (712) is provided with an arc-shaped surface (713) that can contact the thin-walled component (1), and the arc-shaped surface (713) is adapted to the thin-walled component (1).

7. The CNC machining tool for milling the edge of a semi-circular thin-walled part according to claim 1, characterized in that: The fastener (7) includes a fixing body (721) and a pressurizing mechanism (722). The fixing body (721) is disposed opposite to the semi-cylindrical surface (61). A hydraulic cavity (724) is provided in the fixing body (721). A plurality of working holes (727) are provided on the side of the fixing body (721) facing the semi-cylindrical surface (61). Each working hole (727) is connected to the hydraulic cavity (724). An elastic body (732) is provided in each working hole (727) of the fixing body (721). The elastic body (732) can block the working hole (727). The hydraulic cavity (724) is filled with hydraulic medium. The pressurizing mechanism (722) can pressurize the hydraulic medium in the hydraulic cavity (724) and transmit the pressure to the thin-walled part (1) through the elastic body (732).

8. The CNC machining tool for milling the edge of a semi-circular thin-walled part according to claim 7, characterized in that: The fixing body (721) is provided with N partitions (725) in the hydraulic cavity (724). The N partitions (725) divide the hydraulic cavity (724) into N+1 hydraulic channels (726) arranged in the vertical direction. The actuating holes (727) are divided into N+1 groups in the vertical direction, and one group of actuating holes (727) corresponds to one group of hydraulic channels (726).

9. The CNC machining tool for milling the edge of a semi-circular thin-walled part according to claim 8, characterized in that: The pressurizing mechanism (722) includes a pressurizing part (728), a pressurizing piston (729), and a drive rod (730). The pressurizing part (728) is provided with pressurizing chambers (733) that correspond one-to-one with the hydraulic channels (726). Each pressurizing chamber (733) is connected to the hydraulic channels (726) through a central hole (731). The pressurizing piston (729) corresponds one-to-one with the pressurizing chambers (733). The pressurizing piston (729) is disposed in the pressurizing chamber (733) and can press the hydraulic medium in the pressurizing chamber (733) into the hydraulic channels (726) and draw the hydraulic medium in the hydraulic channels (726) into the pressurizing chamber (733).

10. The CNC machining tool for milling the edge of a semi-circular thin-walled part according to claim 7, characterized in that: The tooling table (22) is provided with a second linear drive mechanism (723), which is connected to the fixed body (721) so as to drive the fixed body (721) to approach or move away from the semi-cylindrical surface (61).

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