CNC milling arc tool and using method

Abstract

The invention provides a CNC milling arc tool and a using method. The CNC milling arc tool is characterized in that a corner oil cylinder is arranged on a bottom plate; two machining pedestals are arranged on the two sides of the corner oil cylinder. The machining pedestal comprises a fixing seat and a supporting mold, the fixing seat is fixedly arranged on the bottom plate through a fastener, the supporting mold is arranged above the fixing seat, an annular groove is formed in the upper end of the side wall of the supporting mold, and an airtight monitoring hole is formed in the annular groove in the supporting mold; an oil cylinder pressing rod is arranged at the top of a telescopic rod of the corner oil cylinder, profiling discs are arranged at the two ends of the oil cylinder pressing rod, arc-shaped grooves are formed in the peripheries of the profiling discs, oil cylinder pressing plates are arranged on the lower portions of the profiling discs, and arc-shaped grooves are formed in the oil cylinder pressing plates and correspond to the arc-shaped grooves in the profiling discs. And a plurality of oil spraying pipes are arranged on the bottom plate. The problem that the number of defective workpieces is increased due to the fact that an existing milling tool cutter is poor in lubricating effect and uneven in workpiece pressing force is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of milling clamping tooling, and particularly relates to a CNC milling circular arc tooling and a using method thereof. Background Technique

[0002] The statements in this part only provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] In the field of CNC machining, milling circular arcs is a common machining process, but there are many problems in actual operation. Traditional milling circular arc tooling has deficiencies in workpiece positioning and clamping, making it difficult to ensure the stability of the workpiece during machining, resulting in the machining accuracy not meeting the requirements. For example, the workpiece is prone to displacement during machining, leading to dimensional deviation and poor surface roughness of the milled circular arc. Moreover, during the machining process, there are problems such as an unsatisfactory cooling and lubrication method for the tool, rapid tool wear, short service life, and easy occurrence of workpiece deflection, resulting in workpiece deformation.

[0004] The existing patent publication number CN117984134A discloses a device for machining a traction pin disc, which involves a limiting mechanism and a positioning mechanism. The positioning mechanism is a central positioning turntable, and the outer diameter of the central positioning turntable matches the inner diameter of the workpiece; the limiting mechanism is a corner oil cylinder, which includes an oil cylinder and a pressing plate, and the pressing plate rotates and lifts under the drive of the oil cylinder. The prior art cannot solve the above problems such as poor tool lubrication effect and inability to distinguish whether the workpiece is placed in place. At the same time, when the technical solution of the above comparative document is applied to circular arc milling, there is an easy problem of interference between the tool and other components of the tooling. In milling machining, the roughness of the plane is an important inspection parameter, and the pressing plate provided by the comparative document is extremely likely to cause the situation of warping at some positions of the workpiece, thereby increasing the number of defective workpieces. Summary of the Invention

[0005] Aiming at the above problems, the present invention provides a CNC milling circular arc tooling and a using method thereof, which solve the problem of poor tool lubrication effect of the existing milling tooling, solve the problem of easy interference between the tool and other components of the tooling, and at the same time solve the problem of uneven pressing force on the workpiece to be machined, resulting in an increase in the number of defective workpieces.

[0006] To achieve the above object, the present invention is realized by the following technical solutions:

[0007] In a first aspect, the present invention provides a CNC milling circular arc tooling, comprising: a bottom plate, on which a corner oil cylinder and two processing pedestals are provided; the corner oil cylinder is arranged between the two processing pedestals; the processing pedestal comprises a fixed seat and a support mold, the fixed seat is fixedly arranged on the bottom plate through fasteners, the support mold is fixedly arranged above the fixed seat through fasteners, an annular groove for placing a workpiece is arranged at the upper end of the side wall of the support mold, and an airtight monitoring hole is arranged on the annular groove of the support mold; at the top of the telescopic rod of the corner oil cylinder, there is an oil cylinder pressure rod, at both ends of the oil cylinder pressure rod, there are profiling discs, an arc-shaped groove is arranged circumferentially on the profiling disc for making way for a processing tool, an oil cylinder pressing plate is arranged below the profiling disc, the oil cylinder pressing plate is connected with the profiling disc through fasteners, and an arc-shaped groove is also arranged on the oil cylinder pressing plate and corresponds to the arc-shaped groove on the profiling disc; a plurality of oil spray pipes are arranged on the bottom plate, the oil spray pipes are evenly distributed around each processing pedestal, and the open end of the oil spray pipe corresponds to the arc-shaped groove on the profiling disc.

[0008] As a further implementation manner, the oil cylinder pressure rod is similar to a fish-belly beam shape for improving the load-bearing capacity of the oil cylinder pressure rod; a vertically through hole in the shape of a waist hole is arranged at the central position of the oil cylinder pressure rod, and the top of the telescopic rod of the corner oil cylinder is flat and is installed in the vertically through hole for ensuring the synchronous rotation of the telescopic rod of the corner oil cylinder and the oil cylinder pressure rod.

[0009] As a further implementation manner, the telescopic rod of the corner oil cylinder and the oil cylinder pressure rod are hinged through a pin shaft, one end of the pin shaft is fixedly provided with a fixing plate, and the fixing plate is connected with the side wall of the oil cylinder pressure rod through fasteners for preventing the pin shaft from falling off.

[0010] As a further implementation manner, a first positioning column is arranged at the lower end of the fixed seat, a first positioning groove is arranged on the bottom plate, and the first positioning column is matched with the first positioning groove; a second positioning groove is arranged at the top end of the fixed seat, a second positioning column is arranged at the lower end of the support mold, and the second positioning column is matched with the second positioning groove.

[0011] As a further implementation manner, a countersunk head seat is arranged at the central position of the fixed seat and is fixedly connected with the bottom plate through an internal hexagonal bolt, a plurality of countersunk head seats are arranged at the edge of the support mold and are fixedly connected with the bottom plate through the internal hexagonal bolt passing through the fixed seat, and at the same time, the fixed seat can be limited to prevent the fixed seat from rotating relative to the bottom plate.

[0012] As a further implementation method, airtight monitoring holes are provided on the annular groove of the support mold, and an air passage is provided on the mounting seat corresponding to the airtight monitoring holes. The airtight monitoring holes are connected to an airtight detection device through the air passage, which is used to detect whether the workpiece to be milled is placed in place.

[0013] As a further implementation method, the support mold is frustum-shaped, the oil cylinder pressing plate is conical, and the lower plane of the oil cylinder pressing plate is used to contact and press the workpiece to be milled.

[0014] As a further implementation method, a positioning pin is also provided between the profiling disc and the oil cylinder pressing plate to prevent the oil cylinder pressing plate from rotating relative to the profiling disc.

[0015] As a further implementation method, an oil spray pipe seat is also provided on the bottom plate, and the oil spray pipes correspond to the oil spray pipe seats one by one and are installed on the oil spray pipe seats; a lifting ring is also provided on the bottom plate for moving the position of the arc milling tooling.

[0016] In a second aspect, the present invention also provides a method for using a CNC arc milling tooling, including the following steps:

[0017] S1. Place the workpiece to be milled with an arc in the annular groove at the upper end of the side wall of the support mold; detect whether the workpiece is placed in place. If the air pressure value detected by the airtight monitoring hole is within the normal range, it indicates that the workpiece is placed in place; if the air pressure is abnormal, the position of the workpiece needs to be adjusted again.

[0018] S2. Start the corner oil cylinder. The telescopic rod of the corner oil cylinder rotates 90° and moves downward, driving the oil cylinder pressure rod, the profiling disc, and the oil cylinder pressing plate to move downward; the lower plane of the oil cylinder pressing plate contacts and presses the workpiece to be milled to complete the clamping and fixing of the workpiece.

[0019] S3. According to the processing requirements, set parameters such as the path, rotation speed, and feed rate of the processing tool on the CNC processing equipment; the processing tool performs milling processing along the preset path. During the processing, the arc-shaped groove in the circumferential direction of the profiling disc gives way to the processing tool to ensure that the tool can smoothly perform the arc milling operation on the workpiece; the oil spray pipes distributed around the processing pedestal spray oil into the processing area to cool and lubricate the processing tool and the workpiece, extend the service life of the tool, and ensure the processing quality.

[0020] S4. After the processing is completed, stop the CNC processing equipment and the corner oil cylinder; the telescopic rod of the corner oil cylinder retracts to drive the oil cylinder pressure rod, the profiling disc, and the oil cylinder pressing plate to move upward to release the workpiece. Then, the telescopic rod of the corner oil cylinder rotates 90° to take out the processed workpiece from the annular groove of the support mold to complete one processing process, and repeat the operations of S1-S4.

[0021] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0022] The corner oil cylinder of the present invention is arranged between two processing pedestals. This layout improves the production efficiency of the tooling and enables faster processing and conversion operations of workpieces; an annular groove is provided at the upper end of the side wall of the support die of the processing pedestal for placing the workpiece, providing a stable placement position for the workpiece and facilitating the positioning and clamping of the workpiece; the airtight monitoring hole on the annular groove of the support die can accurately detect whether the workpiece is placed in place, avoiding processing quality problems caused by improper placement of the workpiece, reducing the rejection rate, and an arc-shaped groove is circumferentially provided on the profiling disc at the top of the telescopic rod of the corner oil cylinder to make way for the processing tool, ensuring that the tool can smoothly mill the arc of the workpiece according to the preset path, avoiding interference between the tool and other components of the tooling, ensuring the smooth progress of processing, and improving the processing quality; the setting of the oil cylinder pressing plate replaces the process of manually screwing the screws to press the workpiece, automatically pressing the workpiece through the action of the oil cylinder, not only reducing the input of manpower, reducing the labor intensity, but also greatly shortening the time required to press the workpiece, improving the automation degree and production efficiency of production; a plurality of oil spray pipes provided on the bottom plate are evenly distributed around each processing pedestal, and the open end of the oil spray pipe corresponds to the arc-shaped groove on the profiling disc, which can timely and accurately spray cutting oil to the processing part, playing a good cooling and lubricating role, helping to extend the service life of the tool and improving the processing surface quality.

[0023] The fixed seat of the present invention and the bottom plate are matched through the first positioning column and the first positioning groove, and the support die and the fixed seat are matched through the second positioning column and the second positioning groove, which can achieve rapid and accurate positioning and installation, improve the assembly efficiency and installation accuracy of the tooling, and reduce the processing deviation caused by installation errors; the airtight monitoring hole on the annular groove of the support die is connected to the air path channel and the airtight detection device, which can accurately detect whether the workpiece is placed in place, avoiding processing quality problems caused by improper placement of the workpiece, reducing the rejection rate, and improving the reliability and production efficiency of processing.

[0024] The oil cylinder push rod of the present invention is designed in the shape of a fish-belly beam, greatly improving the bearing capacity, and can stably press the workpiece during the processing to cope with a large processing cutting force. The top of the telescopic rod of the corner oil cylinder is flatly installed in the vertical through hole of the oil cylinder push rod and is hinged through a pin shaft, ensuring synchronous rotation of the two, which is convenient for placing and taking out the workpiece and can meet the angle adjustment requirements that may be required during the processing, improving the practicability and adaptability of the tooling; a lifting ring is provided on the bottom plate, which is convenient for using lifting equipment to move the arc milling tooling, saving manpower during the installation, debugging and maintenance of the tooling, and improving the operation convenience. Description of the Drawings

[0025] The accompanying drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0026] Figure 1 It is the overall structure diagram of the CNC milling circular arc tooling of the present invention;

[0027] Figure 2 It is the central cross-sectional view of the CNC milling circular arc tooling of the present invention.

[0028] In the figure: 1. Base plate; 2. Machining pedestal; 21. Support die; 22. Fixed seat; 23. Airtight monitoring hole; 24. Air passage; 3. Corner oil cylinder; 31. Telescopic rod; 32. Pin shaft; 4. Oil cylinder pressure rod; 41. Vertical through hole; 42. Oil cylinder pressing plate; 5. Profiling disc; 6. Oil spray pipe; 61. Oil spray pipe seat; 7. Lifting ring. Detailed implementation manners

[0029] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanations of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0030] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the present invention clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof;

[0031] Embodiment 1

[0032] This embodiment provides a CNC milling circular arc tooling, as Figure 1 - Figure 2As shown in the figure, it includes: a bottom plate 1, on which a corner oil cylinder 3 and two processing pedestals 2 are arranged; the corner oil cylinder 3 is arranged between the two processing pedestals 2, which improves the production efficiency of the tooling; the processing pedestal 2 includes a fixed seat 22 and a support die 21. The fixed seat 22 is fixedly arranged on the bottom plate 1 through fasteners, and the support die 21 is fixedly arranged above the fixed seat 22 through fasteners. An annular groove for placing workpieces is arranged at the upper end of the side wall of the support die 21, providing a stable placement position for the workpieces and facilitating the positioning and clamping of the workpieces; an airtight monitoring hole 23 is arranged on the annular groove of the support die 21. At the top of the telescopic rod 31 of the corner oil cylinder 3, there is an oil cylinder pressure rod 4. At both ends of the oil cylinder pressure rod 4, there are profiling discs 5. An arc-shaped groove is arranged in the circumferential direction of the profiling disc 5 for making way for the processing tool, ensuring that the tool can smoothly mill the arc of the workpiece according to the preset path and avoiding the interference between the tool and other parts of the tooling. Below the profiling disc 5, there is an oil cylinder pressing plate 42. The oil cylinder pressing plate 42 is connected to the profiling disc 5 through fasteners. An arc-shaped groove is also arranged on the oil cylinder pressing plate 42 and corresponds to the arc-shaped groove on the profiling disc 5. The oil cylinder pressing plate 42 is used to press the workpiece to be milled, replacing the process of manually screwing the screws to press, reducing the input of manpower and the time required for pressing; a plurality of oil spray pipes 6 are arranged on the bottom plate 1. The oil spray pipes 6 are evenly distributed around each processing pedestal 2, and the open end of the oil spray pipe 6 corresponds to the arc-shaped groove on the profiling disc 5, enabling the timely and accurate spraying of cutting oil to the processing part, playing a good role in cooling and lubrication, helping to extend the service life of the tool and improve the processing surface quality.

[0033] As a further implementation method, the oil cylinder pressure rod 4 is similar to a fish-belly beam shape, which is used to improve the bearing capacity of the oil cylinder pressure rod 4; a vertically through hole 41 in the shape of a waist hole is arranged at the central position of the oil cylinder pressure rod 4. The top of the telescopic rod 31 of the corner oil cylinder 3 is flat and is installed in the vertically through hole 41, which is used to ensure the synchronous rotation of the telescopic rod 31 of the corner oil cylinder 3 and the oil cylinder pressure rod 4.

[0034] As a further implementation method, the telescopic rod 31 of the corner oil cylinder 3 and the oil cylinder pressure rod 4 are hinged through a pin shaft 32. One end of the pin shaft 32 is fixedly provided with a fixing plate. The fixing plate is connected to the side wall of the oil cylinder pressure rod 4 through fasteners, which is used to prevent the pin shaft 32 from falling off.

[0035] As a further implementation manner, a first positioning post is arranged at the lower end of the fixed seat 22, and a first positioning groove is arranged on the bottom plate 1. The first positioning post is matched with the first positioning groove; a second positioning groove is arranged at the top end of the fixed seat 22, and a second positioning post is arranged at the lower end of the support die 21. The second positioning post is matched with the second positioning groove to improve the installation accuracy and stability of the support die 21.

[0036] As a further implementation manner, a countersunk head seat is arranged at the central position of the fixed seat 22 and is fixedly connected with the bottom plate 1 through an internal hexagonal bolt. A plurality of countersunk head seats are arranged at the edge of the support die 21 and are fixedly connected with the bottom plate 1 through the internal hexagonal bolt passing through the fixed seat 22, and the fixed seat 22 can be limited at the same time to prevent the fixed seat 22 from rotating relative to the bottom plate 1.

[0037] As a further implementation manner, an air path channel 24 is arranged on the mounting seat corresponding to the airtight monitoring hole 23. The airtight monitoring hole 23 is connected with an airtight detection device through the air path channel 24 to detect whether the workpiece to be milled is placed in place.

[0038] As a further implementation manner, the support die 21 is in a frustum shape, the oil cylinder pressing plate 42 is in a conical shape, and the lower plane of the oil cylinder pressing plate 42 is used for contacting and pressing the workpiece to be milled.

[0039] As a further implementation manner, a positioning pin is further arranged between the profiling disc 5 and the oil cylinder pressing plate 42 to prevent the oil cylinder pressing plate 42 from rotating relative to the profiling disc 5.

[0040] As a further implementation manner, an oil spraying pipe seat 61 is further arranged on the bottom plate 1. The oil spraying pipes 6 correspond to the oil spraying pipe seats 61 one by one and are installed on the oil spraying pipe seats 61; a lifting ring 7 is further arranged on the bottom plate 1 to move the position of the milling circular arc tooling.

[0041] Embodiment 2

[0042] This embodiment provides a method for using a CNC milling circular arc tooling. Before use, the tooling needs to be moved to a suitable position on the CNC machining equipment through the lifting ring 7 to ensure stable placement of the tooling; check whether all components are firmly connected, such as whether the fasteners between the fixed seat 22 and the bottom plate 1, and between the support die 21 and the fixed seat 22 are tightened; check whether the connection between the telescopic rod 31 of the corner oil cylinder 3 and the oil cylinder pressure rod 4 is reliable, and whether the fixing plate of the pin shaft 32 is fastened; connect the airtight detection device to ensure normal connection between the airtight monitoring hole 23 and the air passage 24 for detecting whether the workpiece is placed in place; connect the oil spray pipe 6 to the cooling lubricant supply system to ensure that the oil spray pipe 6 can spray oil normally. The specific usage method includes the following steps:

[0043] S1. Place the workpiece to be milled with a circular arc on the annular groove at the upper end of the side wall of the support die 21. When placing, pay attention to the direction and position of the workpiece to ensure that the machined position corresponds to the position of the annular groove; start the airtight detection device to detect the air pressure value of the airtight monitoring hole 23 to check whether the workpiece is placed in place. If the air pressure value detected by the airtight monitoring hole 23 is within the normal range, it indicates that the workpiece is placed in place; if the air pressure is abnormal, it means that there may be a deviation in the placement of the workpiece, such as the workpiece not being in close contact with the annular groove or the placement angle being incorrect. At this time, the position of the workpiece needs to be adjusted in time until the air pressure value returns to normal;

[0044] S2. Start the corner oil cylinder 3. The telescopic rod 31 of the corner oil cylinder 3 rotates 90° and moves downward, driving the oil cylinder pressure rod 4, the profiling disc 5, and the oil cylinder pressing plate 42 to move downward; the lower plane of the oil cylinder pressing plate 42 contacts and presses the workpiece to be milled to complete the clamping and fixing of the workpiece. During this process, pay attention to observing whether the oil cylinder pressing plate 42 presses the workpiece evenly to avoid uneven pressing; if there is uneven pressing, the workpiece may displace or be unevenly stressed during processing, thus affecting the processing accuracy;

[0045] S3. According to the processing requirements, set parameters such as the path, rotation speed, and feed rate of the processing tool on the CNC machining equipment; the processing tool performs milling processing along the preset path. During the processing, the arc-shaped groove in the circumferential direction of the profiling disc 5 gives way to the processing tool to ensure that the tool can smoothly perform the circular arc milling operation on the workpiece; spray oil to the processing area through the oil spray pipes 6 distributed around the processing pedestal 2 to cool and lubricate the processing tool and the workpiece, extend the service life of the tool, and ensure the processing quality;

[0046] Since the oil cylinder pressure rod 4 is similar to a fish-belly beam, it can effectively improve the load-bearing capacity and ensure stable pressing of the tooling on the workpiece during processing; at the same time, the top of the telescopic rod 31 of the corner oil cylinder 3 is flatly installed in the vertical through hole 41 of the oil cylinder pressure rod 4 and is hinged through the pin shaft 32, ensuring that the telescopic rod 31 of the corner oil cylinder 3 and the oil cylinder pressure rod 4 rotate synchronously, facilitating the placement and removal of the workpiece;

[0047] S4. After the machining is completed, stop the CNC machining equipment and the corner oil cylinder 3; the retraction of the telescopic rod 31 of the corner oil cylinder 3 drives the oil cylinder pressure rod 4, the profiling disc 5 and the oil cylinder pressing plate 42 to move upward, loosen the workpiece, and then the telescopic rod 31 of the corner oil cylinder 3 rotates 90°, take out the machined workpiece from the annular groove of the support die 21, complete one machining process, and repeat the operations of S1-S4.

[0048] Although the specific implementation manners of the present invention are described above in conjunction with the drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present invention.

Claims

1. A CNC milling circular arc tooling, characterized in that, Comprising: A bottom plate, on which a corner oil cylinder and two processing pedestals are arranged; the corner oil cylinder is arranged between the two processing pedestals; the processing pedestal includes a fixed seat and a support mold. The fixed seat is fixedly arranged on the bottom plate through fasteners, the support mold is fixedly arranged above the fixed seat through fasteners. An annular groove for placing a workpiece is arranged at the upper end of the side wall of the support mold, and an airtight monitoring hole is arranged on the annular groove of the support mold; at the top of the telescopic rod of the corner oil cylinder, there is an oil cylinder pressure rod, at both ends of the oil cylinder pressure rod, there are profiling discs, and arc grooves are arranged circumferentially on the profiling discs for making way for the processing tool. At the lower part of the profiling disc, there is an oil cylinder pressing plate, the oil cylinder pressing plate is connected with the profiling disc through fasteners, and an arc groove is also arranged on the oil cylinder pressing plate and corresponds to the arc groove on the profiling disc; a plurality of oil spray pipes are arranged on the bottom plate, the oil spray pipes are evenly distributed around each processing pedestal, and the opening ends of the oil spray pipes correspond to the arc grooves on the profiling disc.

2. The CNC milling circular arc tooling according to claim 1, characterized in that, The oil cylinder pressure rod is similar to a fish-belly beam shape for improving the load-bearing capacity of the oil cylinder pressure rod; a vertical through hole in the shape of a waist hole is arranged at the central position of the oil cylinder pressure rod, and the top of the telescopic rod of the corner oil cylinder is flat and is installed in the vertical through hole for ensuring the synchronous rotation of the telescopic rod of the corner oil cylinder and the oil cylinder pressure rod.

3. The CNC milling circular arc tooling according to claim 2, characterized in that, The telescopic rod of the corner oil cylinder and the oil cylinder pressure rod are hinged through a pin shaft, and a fixing plate is fixedly arranged at one end of the pin shaft, and the fixing plate is connected with the side wall of the oil cylinder pressure rod through fasteners for preventing the pin shaft from falling off.

4. The CNC milling circular arc tooling according to claim 1, characterized in that, At the lower end of the fixed seat, there is a first positioning column, and a first positioning groove is arranged on the bottom plate, and the first positioning column is matched with the first positioning groove; at the top end of the fixed seat, there is a second positioning groove, and at the lower end of the support mold, there is a second positioning column, and the second positioning column is matched with the second positioning groove.

5. The CNC milling circular arc tooling according to claim 1, characterized in that, A counterbore seat is arranged at the central position of the fixed seat and is fixedly connected with the bottom plate through an internal hexagonal bolt. A plurality of counterbore seats are arranged at the edge of the support mold and are fixedly connected with the bottom plate through the internal hexagonal bolts passing through the fixed seat, and at the same time, the fixed seat can be limited to prevent the fixed seat from rotating relative to the bottom plate.

6. The CNC milling circular arc tooling according to claim 1, characterized in that, An airtight monitoring hole is arranged on the annular groove of the support mold, an air path channel is arranged on the mounting seat corresponding to the airtight monitoring hole, and the airtight monitoring hole is connected with an airtight detection device through the air path channel for detecting whether the milled workpiece is placed in place.

7. The CNC milling circular arc tooling according to claim 1, characterized in that, The support mold is in the shape of a frustum of a cone, the oil cylinder pressing plate is in the shape of a cone, and the lower plane of the oil cylinder pressing plate is used for contacting and pressing the milled workpiece.

8. A CNC milling circular arc tooling as claimed in claim 7, characterized in that, A positioning pin is also arranged between the profiling disc and the oil cylinder pressing plate for preventing the oil cylinder pressing plate from rotating relative to the profiling disc.

9. The CNC milling circular arc tooling according to claim 7, characterized in that, An oil spray pipe seat is also arranged on the bottom plate, the oil spray pipes correspond to the oil spray pipe seats one by one and are installed on the oil spray pipe seats; a lifting ring is also arranged on the bottom plate for moving the position of the milling arc tooling.

10. A method for using a CNC milling circular arc tooling according to any one of claims 1-9, characterized in that, Including the following steps: S1. Place the workpiece with the arc to be milled in the annular groove at the upper end of the side wall of the support die; detect whether the workpiece is placed in place. If the air pressure value detected by the airtight monitoring hole is within the normal range, it indicates that the workpiece is placed in place; If the air pressure is abnormal, the position of the workpiece needs to be readjusted; S2. Start the corner oil cylinder. The telescopic rod of the corner oil cylinder rotates 90° and moves downward, driving the oil cylinder pressure rod, profiling disc, and oil cylinder pressing plate to move downward; the lower plane of the oil cylinder pressing plate contacts and presses the workpiece to be milled, completing the clamping and fixing of the workpiece; S3. According to the processing requirements, set parameters such as the path, rotation speed, and feed rate of the processing tool on the CNC processing equipment; the processing tool performs milling processing along the preset path. During the processing, the arc-shaped groove in the circumferential direction of the profiling disc gives way to the processing tool to ensure that the tool can smoothly perform the arc milling operation on the workpiece; spray oil to the processing area through the oil spray pipes distributed around the processing pedestal to cool and lubricate the processing tool and the workpiece, extend the service life of the tool, and ensure the processing quality; S4. After the processing is completed, stop the CNC processing equipment and the corner oil cylinder; the telescopic rod of the corner oil cylinder retracts, driving the oil cylinder pressure rod, profiling disc, and oil cylinder pressing plate to move upward, loosening the workpiece. Subsequently, the telescopic rod of the corner oil cylinder rotates 90°, and the processed workpiece is taken out from the annular groove of the support die, completing one processing process, and repeating the operations of S1 - S4.

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