Processing method and processing tool for cavity side wall special-shaped reverse buckling

Abstract

The application discloses a processing method for a cavity side wall special-shaped undercut, and comprises the following steps: S1, processing a hole at a position where a special-shaped undercut needs to be formed on the cavity; S2, selecting a tool whose side slope has the same slope as the smallest included angle position on the special-shaped undercut; S3, performing transverse cutting processing on the smallest included angle position and progressive cutting along the hole axis direction; and S4, the tool comprises an outer edge angle and an outer side, in the area outside the smallest included angle position, first transversely cutting to the outer edge angle to a target position, then rotating the outer edge angle as the center to the outer side to the target position, and then performing progressive cutting along the hole axis direction. The application provides a processing method for a cavity side wall special-shaped undercut, can solve the situation that a conventional tool cannot be processed in place, does not leave a processing dead angle when processing the inclined undercut, and reduces the interference problem between the tool and the cavity.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a machining method and machining tool for irregularly shaped undercuts on the sidewalls of a cavity. Background Technology

[0002] Cavity-shaped undercuts are a common complex structure in machining. These structures are usually located inside cavities, are irregular in shape, and have undercuts (i.e., the opening direction of the undercut is opposite to the main machining direction, and cannot be directly formed by conventional unidirectional milling). They are widely used in key components such as aerospace engine housings, automotive gearbox housings, precision mold cavities, and semiconductor PM cavities.

[0003] For example, announcement number "CN119225091A" discloses "a camera module and semiconductor cavity," including a camera assembly for acquiring images within the semiconductor cavity; a light source assembly forming an optical path between the light source assembly and the camera assembly for providing illumination to the semiconductor cavity through the optical path; a light-shielding assembly located at the imaging end of the camera assembly for reducing the light flux emitted from the light source assembly into the semiconductor cavity in the optical path; a housing, in which the camera assembly, light source assembly, and light-shielding assembly are all disposed; and a connecting assembly, one end of which is connected to the housing and the other end of which is connected to the light-shielding assembly, the connecting assembly being made of metal. However, in practical applications, when the undercut structure is tilted, conventional cutting tools are prone to interference or incomplete machining, potentially leaving machining dead angles. Summary of the Invention

[0004] In view of the problems of interference and incomplete processing in the existing technology for machining inclined undercut structures mentioned in the background art, the present invention provides a machining method for irregular undercuts on the sidewall of the cavity, which can solve the problem that conventional tools cannot machine in place, and leaves no machining dead corners when machining inclined undercuts, thereby reducing the interference problem between the tool and the cavity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A method for processing irregularly shaped undercuts on the sidewalls of a cavity includes the following steps: S1. Holes are machined at the locations in the cavity where irregular inverted shapes need to be formed; S2. The side slope of the selected tool has the same slope as the minimum angle on the irregular undercut. S3. Perform transverse cutting on the smallest included angle position on the irregular undercut, and proceed cutting along the axis of the hole; S4. The cutting tool includes an outer edge and an outer side. In the area outside the minimum included angle, first cut laterally to the outer edge to the target position, then rotate with the outer edge as the center to the outer side to the target position, and then proceed to cut along the axis of the hole.

[0007] Preferably, the maximum angle position is provided on the opposite side of the minimum angle position of the irregular undercut, and the cutting tool includes an inner edge angle, the outer edge angle is the same as the angle of the minimum angle position, and the inner edge angle is the same as the angle of the maximum angle position.

[0008] Preferably, when cutting at the maximum included angle, the cavity is inverted, and the tool starts cutting laterally from the bottom of the hole, and then proceeds to cut towards the top of the hole along the axis of the hole.

[0009] Preferably, the cutting tool has connection positions on both ends of the cutting head that can connect to the cutting neck. When cutting the maximum included angle position, the cutting tool is installed in reverse and processed using the same processing method as in step S3.

[0010] Preferably, the cavity is provided with a conventional undercut. When cutting the conventional undercut, a cutter with no side tilt is used to cut the conventional undercut.

[0011] As a preferred embodiment, a machining tool includes a cutting head, the cutting head being provided with an inner edge angle and an outer edge angle, an outer side being formed between the inner edge angle and the outer edge angle, the outer side being inclined, and when the cutting end face is in contact with the irregular undercut end face, the outer side is in contact with the irregular undercut sidewall.

[0012] Preferably, the cutter head includes a central disk on which a plurality of cutting teeth are provided, and the inner edge angle, outer edge angle and outer side are all provided on the cutting teeth.

[0013] Preferably, the cutting tooth includes a tooth end face, the width of which is smaller on the side near the inner edge corner than on the side near the outer edge corner.

[0014] Preferably, the blade includes a blade neck connected to the blade head, the blade neck having a connecting hole, the end face of the connecting hole having a slot, the blade head having a locking block connected to the slot, and the blade head having a fastening bolt that can pass through the blade head and connect to the connecting hole.

[0015] Preferably, the blade neck is connected to a handle on the side away from the blade tip.

[0016] The beneficial effects of this invention are as follows: (1) It can process inclined undercut structures and can fit with the smallest angle of the undercut structure to ensure processing quality, eliminate processing dead angles, and improve processing efficiency. (2) It can adapt to the processing of other parts except the minimum included angle position. Especially when processing the maximum included angle position, it can quickly process the maximum included angle position by utilizing the complementary relationship between the maximum included angle position and the minimum included angle position, while ensuring the processing quality of the maximum included angle position and improving the overall processing efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is an isometric sectional view of the cavity in this invention.

[0019] Figure 3 This is a front view of the cutting tool in this invention.

[0020] Figure 4 This is an isometric view of the cutting tool in this invention.

[0021] Figure 5 This is a schematic diagram of the existing technology.

[0022] Figure 6 This is a schematic diagram of the structure of Example 2.

[0023] Figure 7 This is a schematic diagram of the structure of Example 3.

[0024] In the picture: 1 cavity; 2. Irregularly shaped undercut, 21. Hole, 22. Minimum included angle, 23. Maximum included angle; 3. Tool, 31. Outer edge angle, 32. Outer side, 33. Inner edge angle, 34. Tool head, 341. Center plate, 342. Cutting tooth, 343. Tooth end face, 35. Tool neck, 351. Connecting hole, 352. Slot, 36. Tool holder, 37. Fastening bolt; 4. Regular inverted deduction. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1:

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a method for processing an irregularly shaped undercut 2 on the side wall of a cavity 1 includes the following steps: S1. A hole 21 is machined at the position where the irregular inverted buckle 2 needs to be formed in cavity 1; S2. The side inclination of the selected tool 3 has the same inclination as the minimum included angle position 22 on the irregular undercut 2; S3. Perform transverse cutting on the minimum included angle position 22 on the irregular undercut 2, and proceed cutting along the axis of the hole 21. S4. The tool 3 includes an outer edge angle 31 and an outer side 32. In the area outside the minimum included angle position 22, it first cuts laterally to the outer edge angle 31 to the target position, then rotates with the outer edge angle 31 as the center to the outer side 32 to the target position, and then cuts along the axis of the hole 21.

[0028] The specific processing method in this embodiment is as follows: The cavity 1 selected in this embodiment has two undercuts, which are set opposite to each other on the two end faces of the cavity 1. One is an inclined undercut and the other is a conventional undercut 4. The center line of the inclined undercut is inclined, so the two sides of the inclined undercut form a minimum included angle position 22 and a maximum included angle position 23. Further, in this embodiment, a planar undercut structure with an included angle of 90° is set between the minimum included angle position 22 and the maximum included angle position 23. A rounded transition is formed on both sides of the maximum included angle position 23 and the two planar undercuts, that is, a rounded transition is formed in the area between the maximum included angle position 23 and the two planar undercuts, and between the minimum included angle position 22 and the two planar undercuts, thereby reducing the stress concentration area. Since the position of the arc transition area is equivalent to being set between the maximum included angle position 23 and the minimum included angle position 22, the included angle with the undercut on the arc transition area is between the included angle of the minimum included angle position 22 and the maximum included angle position 23. The included angle of each area on the conventional undercut 4 is 90°.

[0029] During the processing, holes 21 that need to form an undercut structure are first machined. In this embodiment, since holes 21 need to be machined at both the top and bottom, the upper hole 21 in the drawing direction is inclined, and the lower hole 21 in the drawing direction is vertical. In the subsequent processing, irregular undercuts 2 need to be formed in the upper hole 21, and regular undercuts 4 need to be formed in the lower hole 21. First, a tool 3 with the same angle as the minimum included angle 22 on the irregular undercut 2 is selected. The side of the tool 3 is inclined. In the side view direction, the inclination of the side of the tool 3 is the same as the included angle on the minimum included angle, that is, the contour of the rotating tool 3 can completely fit the edge on the minimum included angle 22 after machining. After selecting this tool 3, First, the minimum included angle position 22 on the irregular undercut 2 is cut. Since the hole 21 structure has already been processed, when processing the minimum included angle position 22, the tool 3 is first placed horizontally, and then cuts horizontally until the outer edge 32 reaches the target position of the edge of the minimum included angle position 22. The outer edge 32 is the edge position tilted during the rotation of the tool 3. At this time, the minimum included angle position 22 has been processed. The tool 3 is controlled to move progressively along the axis of the hole 21, with the top of the hole 21 facing the bottom. In this process, by continuously repeating the above cutting steps, after the tool 3 has moved along the direction of the hole 21, the minimum included angle position 22 and the corresponding side wall area on the minimum included angle position 22 are processed.

[0030] Subsequently, the area excluding the minimum included angle position 22 needs to be cut. On the arc transition area on both sides of the minimum included angle position 22, the included angle range on the arc transition area is between the minimum included angle position 22 and the angle 90°. This angle is greater than the tilt angle of the outer side 32 of the tool 3. Therefore, if the tool 3 is always kept horizontal for cutting, a cutting dead angle will occur. If different tools 3 are directly replaced to adapt, the number of working steps will increase and the work efficiency will decrease. Therefore, in this embodiment, when cutting the area other than the minimum included angle position 22, the tool 3 is first controlled to cut laterally to the outer edge angle 31 to reach the target position. At this time, since the included angle of the side wall in this area is greater than the tilt angle of the outer side 32, there is still some space to be cut in the area below the outer edge angle 31. At this time, the tool 3 is controlled to rotate with the outer edge angle 31 as the center, so that the outer side 32 continuously approaches the inverted target side wall position. When the inclination of the outer side 32 and the target side wall position is the same, the cutting of this part is completed. Then, the tool moves along the axis of the hole 21, and the tool 3 repeats the above processing steps to perform progressive cutting.

[0031] In this embodiment, the cutting method described above reduces the steps of changing the cutting tool 3 during the cutting process. Since the cutting tool 3 is selected at the same angle as the minimum included angle 22, the irregular undercut 2 can be cut quickly by lateral movement, and no processing dead angle will be left at the minimum included angle 22. The included angles of the other areas of the irregular undercut 2 are greater than the included angle at the minimum included angle 22. Therefore, there will be no interference problem when the cutting tool 3 cuts other parts. It is only necessary to rotate and cut with the outer edge angle 31 as the center to cut the area that was not cut during the lateral cutting process.

[0032] Example 2:

[0033] like Figure 6 As shown, a method for processing an irregularly shaped undercut 2 on the side wall of a cavity 1 includes the following steps: S1. A hole 21 is machined at the position where the irregular inverted buckle 2 needs to be formed in cavity 1; S2. The side inclination of the selected tool 3 has the same inclination as the minimum included angle position 22 on the irregular undercut 2; S3. Perform transverse cutting on the minimum included angle position 22 on the irregular undercut 2, and proceed cutting along the axis of the hole 21. S4. The tool 3 includes an outer edge angle 31 and an outer side 32. In the area outside the minimum included angle position 22, it first cuts laterally to the outer edge angle 31 to the target position, then rotates with the outer edge angle 31 as the center to the outer side 32 to the target position, and then cuts along the axis of the hole 21. The opposite side of the minimum included angle position 22 of the irregular undercut 2 is provided with the maximum included angle position 23. The tool 3 includes an inner edge angle 33, the included angle of the outer edge angle 31 is the same as the included angle of the minimum included angle position 22, and the included angle of the inner edge angle 33 is the same as the included angle of the maximum included angle position 23. When cutting the maximum included angle position 23, the cavity 1 is inverted, and the tool 3 starts to cut laterally from the bottom of the hole 21, and then cuts towards the top of the hole 21 along the axis of the hole 21. The cavity 1 is equipped with a conventional undercut 4. When cutting the conventional undercut 4, the cutter 3 with no side tilt is replaced to cut the conventional undercut 4.

[0034] The specific processing method in this embodiment is as follows: The cavity 1 selected in this embodiment has two undercuts, which are set opposite to each other on the two end faces of the cavity 1. One is an inclined undercut and the other is a conventional undercut 4. The center line of the inclined undercut is inclined, so the two sides of the inclined undercut form a minimum included angle position 22 and a maximum included angle position 23. Further, in this embodiment, a planar undercut structure with an included angle of 90° is set between the minimum included angle position 22 and the maximum included angle position 23. A rounded transition is formed on both sides of the maximum included angle position 23 and the two planar undercuts, that is, a rounded transition is formed in the area between the maximum included angle position 23 and the two planar undercuts, and between the minimum included angle position 22 and the two planar undercuts, thereby reducing the stress concentration area. Since the position of the arc transition area is equivalent to being set between the maximum included angle position 23 and the minimum included angle position 22, the included angle with the undercut on the arc transition area is between the included angle of the minimum included angle position 22 and the maximum included angle position 23. The included angle of each area on the conventional undercut 4 is 90°.

[0035] During the processing, holes 21 that need to form an undercut structure are first machined. In this embodiment, since holes 21 need to be machined at both the top and bottom, the upper hole 21 in the drawing direction is inclined, and the lower hole 21 in the drawing direction is vertical. In the subsequent processing, irregular undercuts 2 need to be formed in the upper hole 21, and regular undercuts 4 need to be formed in the lower hole 21. First, a tool 3 with the same angle as the minimum included angle 22 on the irregular undercut 2 is selected. The side of the tool 3 is inclined. In the side view direction, the inclination of the side of the tool 3 is the same as the included angle on the minimum included angle, that is, the contour of the rotating tool 3 can completely fit the edge on the minimum included angle 22 after machining. After selecting this tool 3, First, the minimum included angle position 22 on the irregular undercut 2 is cut. Since the hole 21 structure has already been processed, when processing the minimum included angle position 22, the tool 3 is first placed horizontally, and then cuts horizontally until the outer edge 32 reaches the target position of the edge of the minimum included angle position 22. The outer edge 32 is the edge position tilted during the rotation of the tool 3. At this time, the minimum included angle position 22 has been processed. The tool 3 is controlled to move progressively along the axis of the hole 21, with the top of the hole 21 facing the bottom. In this process, by continuously repeating the above cutting steps, after the tool 3 has moved along the direction of the hole 21, the minimum included angle position 22 and the corresponding side wall area on the minimum included angle position 22 are processed.

[0036] In this embodiment, the irregularly shaped buckle 2 is inclined, so the irregularly shaped buckle 2 has a minimum included angle position 22 and a corresponding maximum included angle position 23. In this embodiment, the minimum included angle position 22 is an acute angle, while the maximum included angle position 23 is an obtuse angle. The minimum included angle position 22 and the maximum included angle position 23 are complementary. The tool 3 has an inner edge angle 33, an outer edge angle 31, and an outer side edge 32. The outer edge angle 31, the inner edge angle 33, and the outer side edge 32 are all side projections of the tool 3 after rotation. In this embodiment, the outer edge angle 31 is the outermost angle of the tool 3, while the inner edge angle 33 is the innermost angle of the tool 3. The outer edge angle 31 is an acute angle, and the acute angle is the same as the angle of the minimum included angle position 22. Therefore, since the upper and lower end faces of the tool 3 are parallel, the inner edge angle 33 is an obtuse angle, and the obtuse angle of the inner edge angle 33 is complementary to the acute angle of the outer edge angle 31. This ensures that when the inner edge angle 33 is cutting the maximum included angle position 23, the included angle of the inner edge angle 33 is the same as that of the maximum included angle position 23, thus ensuring that the shape of the maximum included angle position 23 can be directly cut.

[0037] In this embodiment, when cutting the maximum included angle position 23, since the tool 3 first cuts the minimum included angle position 22 through the outer edge angle 31, the outer edge angle 31 and the maximum included angle position 23 to be formed are centrally symmetrical. If the tool 3 is directly moved laterally to the position corresponding to the maximum included angle position 23, the position of the tool 3 corresponding to the maximum included angle position 23 is the outer edge angle 31. If the tool 3 is directly cut through the outer edge angle 31, it will result in a machining dead angle on the maximum included angle position 23. Therefore, in this embodiment, to avoid the above situation, the inner edge angle 33 is used to cut the maximum included angle position 23. Since the inner edge angle 33 of the tool 3 is set below the outer edge angle 31, the inner edge angle 33 cannot directly abut the maximum included angle position 23. In this embodiment, the cavity 1 is formed, thereby making the cavity When the cavity 1 is positioned opposite each other in the vertical direction, the cutting tool 3 can pass through the conventional undercut 4 at the bottom of the cavity 1 and start cutting from bottom to top on the undercut side wall of the maximum included angle position 23 (where "top" and "bottom" refer to the top and bottom positions when the irregular undercut 2 is placed above the conventional undercut 4 in the conventional placement, and the top and bottom are reversed after the cavity 1 is inverted). Due to the cavity 1, the outer edge 32 has the same tilt angle as the side wall of the irregular undercut 2. When processing from top to bottom, the inner edge angle 33 can just fit and abut against the maximum included angle position 23, and there is no processing dead angle. Therefore, the cutting tool 3 only needs to perform progressive cutting from bottom to top to complete the cutting processing on the maximum included angle position 23 and its corresponding side wall, ensuring processing efficiency.

[0038] The conventional undercut 4 on the cavity 1 is cut by a cutter 3 without tilt, thereby cutting off the conventional right-angle undercut structure. In this embodiment, the conventional undercut 4 is set at the bottom of the irregular undercut 2, and the cutter 3 can pass through the conventional undercut 4 to cut the irregular undercut 2.

[0039] Example 3:

[0040] like Figure 7 As shown, a method for processing an irregularly shaped undercut 2 on the side wall of a cavity 1 includes the following steps: S1. A hole 21 is machined at the position where the irregular inverted buckle 2 needs to be formed in cavity 1; S2. The side inclination of the selected tool 3 has the same inclination as the minimum included angle position 22 on the irregular undercut 2; S3. Perform transverse cutting on the minimum included angle position 22 on the irregular undercut 2, and proceed cutting along the axis of the hole 21. S4. The tool 3 includes an outer edge angle 31 and an outer side 32. In the area outside the minimum included angle position 22, it first cuts laterally to the outer edge angle 31 to the target position, then rotates with the outer edge angle 31 as the center to the outer side 32 to the target position, and then cuts along the axis of the hole 21. The opposite side of the minimum included angle position 22 of the irregular undercut 2 is provided with the maximum included angle position 23. The tool 3 includes an inner edge angle 33, the included angle of the outer edge angle 31 is the same as the included angle of the minimum included angle position 22, and the included angle of the inner edge angle 33 is the same as the included angle of the maximum included angle position 23. Both ends of the cutting head 34 of the cutting tool 3 are provided with connection positions that can connect to the cutting neck 35. When cutting the maximum included angle position 23, the cutting tool 3 is installed in reverse and processed in the same way as in step S3. The cavity 1 is equipped with a conventional undercut 4. When cutting the conventional undercut 4, the cutter 3 with no side tilt is replaced to cut the conventional undercut 4.

[0041] The specific processing method in this embodiment is as follows: The cavity 1 selected in this embodiment has two undercuts, which are set opposite to each other on the two end faces of the cavity 1. One is an inclined undercut and the other is a conventional undercut 4. The center line of the inclined undercut is inclined, so the two sides of the inclined undercut form a minimum included angle position 22 and a maximum included angle position 23. Further, in this embodiment, a planar undercut structure with an included angle of 90° is set between the minimum included angle position 22 and the maximum included angle position 23. A rounded transition is formed on both sides of the maximum included angle position 23 and the two planar undercuts, that is, a rounded transition is formed in the area between the maximum included angle position 23 and the two planar undercuts, and between the minimum included angle position 22 and the two planar undercuts, thereby reducing the stress concentration area. Since the position of the arc transition area is equivalent to being set between the maximum included angle position 23 and the minimum included angle position 22, the included angle with the undercut on the arc transition area is between the included angle of the minimum included angle position 22 and the maximum included angle position 23. The included angle of each area on the conventional undercut 4 is 90°.

[0042] During the processing, holes 21 that need to form an undercut structure are first machined. In this embodiment, since holes 21 need to be machined at both the top and bottom, the upper hole 21 in the drawing direction is inclined, and the lower hole 21 in the drawing direction is vertical. In the subsequent processing, irregular undercuts 2 need to be formed in the upper hole 21, and regular undercuts 4 need to be formed in the lower hole 21. First, a tool 3 with the same angle as the minimum included angle 22 on the irregular undercut 2 is selected. The side of the tool 3 is inclined. In the side view direction, the inclination of the side of the tool 3 is the same as the included angle on the minimum included angle, that is, the contour of the rotating tool 3 can completely fit the edge on the minimum included angle 22 after machining. After selecting this tool 3, First, the minimum included angle position 22 on the irregular undercut 2 is cut. Since the hole 21 structure has already been processed, when processing the minimum included angle position 22, the tool 3 is first placed horizontally, and then cuts horizontally until the outer edge 32 reaches the target position of the edge of the minimum included angle position 22. The outer edge 32 is the edge position tilted during the rotation of the tool 3. At this time, the minimum included angle position 22 has been processed. The tool 3 is controlled to move progressively along the axis of the hole 21, with the top of the hole 21 facing the bottom. In this process, by continuously repeating the above cutting steps, after the tool 3 has moved along the direction of the hole 21, the minimum included angle position 22 and the corresponding side wall area on the minimum included angle position 22 are processed.

[0043] In this embodiment, the irregularly shaped buckle 2 is inclined, so the irregularly shaped buckle 2 has a minimum included angle position 22 and a corresponding maximum included angle position 23. In this embodiment, the minimum included angle position 22 is an acute angle, while the maximum included angle position 23 is an obtuse angle. The minimum included angle position 22 and the maximum included angle position 23 are complementary. The tool 3 has an inner edge angle 33, an outer edge angle 31, and an outer side edge 32. The outer edge angle 31, the inner edge angle 33, and the outer side edge 32 are all side projections of the tool 3 after rotation. In this embodiment, the outer edge angle 31 is the outermost angle of the tool 3, while the inner edge angle 33 is the innermost angle of the tool 3. The outer edge angle 31 is an acute angle, and the acute angle is the same as the angle of the minimum included angle position 22. Therefore, since the upper and lower end faces of the tool 3 are parallel, the inner edge angle 33 is an obtuse angle, and the obtuse angle of the inner edge angle 33 is complementary to the acute angle of the outer edge angle 31. This ensures that when the inner edge angle 33 is cutting the maximum included angle position 23, the included angle of the inner edge angle 33 is the same as that of the maximum included angle position 23, thus ensuring that the shape of the maximum included angle position 23 can be directly cut.

[0044] In this embodiment, when cutting the maximum included angle position 23, since the tool 3 first cuts the minimum included angle position 22 through the outer edge angle 31, the outer edge angle 31 and the maximum included angle position 23 to be formed are centrally symmetrical. If the tool 3 is directly moved laterally to the position corresponding to the maximum included angle position 23, the position of the tool 3 corresponding to the maximum included angle position 23 is the outer edge angle 31. If cutting directly through the outer edge angle 31, there will be a machining dead angle on the maximum included angle position 23. Therefore, in this embodiment, to avoid the above situation, the tool head 34 is set to a structure in which both ends of the tool head 3 can be connected to the tool neck 35, so that the tool head 34 can be connected to the tool neck 35 in reverse order, thereby changing the relative position of the inner edge angle 33 and the outer edge angle 31. Therefore, in this embodiment, when machining the minimum included angle position 22, the installation method in which the outer edge angle 31 is set above the inner edge angle 33 is adopted, and when machining the maximum included angle position 23, the installation method in which the inner edge angle 33 is set above the outer edge angle 31 is adopted. In this embodiment, since the cutter head 34 can be connected inverted, the step of inverting the cavity 1 is avoided. At the same time, since the maximum included angle position 23 and the minimum included angle position 22 are complementary structures, and the outer edge angle 31 and the inner edge angle 33 are also complementary structures, when machining the minimum included angle position 22 and the maximum included angle position 23, a symmetrical machining method can be adopted, and the reverse displacement in the lateral direction can be controlled, thereby ensuring machining accuracy, simplifying the machining process, and reducing the difficulty of adjustment.

[0045] The conventional undercut 4 on the cavity 1 is cut by a cutter 3 without tilt, thereby cutting off the conventional right-angle undercut structure. In this embodiment, the conventional undercut 4 is set at the bottom of the irregular undercut 2, and the cutter 3 can pass through the conventional undercut 4 to cut the irregular undercut 2.

[0046] Example 4:

[0047] like Figure 3 , Figure 4 As shown, a machining tool 3 includes a tool head 34, on which an inner edge angle 33 and an outer edge angle 31 are provided. An outer side 32 is formed between the inner edge angle 33 and the outer edge angle 31. The outer side 32 is inclined and when the end face of the tool 3 is in contact with the end face of the irregular undercut 2, the outer side 32 is in contact with the side wall of the irregular undercut 2. The machining tool 3 in this embodiment is used for machining in embodiments 1, 2, and 3. The machining tool 3 includes a tool head 34, a tool neck 35, and a tool holder 36. The tool head 34 is provided with an inner edge angle 33 and an outer edge angle 31. An outer side 32 is formed between the inner edge angle 33 and the outer edge angle 31. During the machining process, the outer side 32 can keep in close contact with the side wall of the irregular undercut 2 and can avoid the generation of machining dead angles when machining the minimum included angle position 22 and the maximum included angle position 23. The detachable connection between the tool head 34, the tool neck 35, and the tool holder 36 can ensure the flexibility of the connection and improve the adaptability of the machining.

[0048] like Figure 3 , Figure 4 As shown, the cutter head 34 includes a central disk 341, on which a plurality of cutting teeth 342 are provided. Inner edge angle 33, outer edge angle 31, and outer side 32 are all provided on the cutting teeth 342. The cutter head 34 includes a central disk 341, on which a plurality of spaced-apart cutting teeth 342 are provided. Each cutting tooth 342 has an inner edge angle 33, an outer edge angle 31, and an outer side 32. After the cutter head 34 rotates, the side projection of the cutter head 34 forms an isosceles trapezoidal structure.

[0049] like Figure 3 , Figure 4 As shown, the cutting tooth 342 includes a tooth end face 343. The width of the tooth end face 343 near the inner edge angle 33 is smaller than the width near the outer edge angle 31. The width of the tooth end face 343 of the cutting tooth 342 is not uniformly distributed; the tooth end face 343 is narrower on the side near the inner edge angle 33 and wider on the side near the outer edge angle 31, thereby ensuring cutting quality and cutting speed.

[0050] like Figure 3 , Figure 4 As shown, the device includes a blade neck 35 connected to a blade head 34. The blade neck 35 has a connecting hole 351, and a slot 352 is provided on the end face of the connecting hole 351. The blade head 34 has a locking block that connects to the slot 352. A fastening bolt 37 is connected to the blade head 34, capable of passing through the blade head 34 and connecting to the connecting hole 351. A handle 36 is connected to the side of the blade neck 35 away from the blade head 34.

[0051] A locking block is provided on the cutting head 34, and a locking groove 352 is provided on the cutting neck 35. The locking block can engage with the locking groove 352. The locking groove 352 is provided on the end face of the cutting neck 35 near the cutting head 34. A connecting hole 351 is also provided on the end face of the cutting neck 35 near the cutting head 34. A through hole is provided on the cutting head 34. The fastening bolt 37 can pass through the through hole and connect with the connecting hole 351 on the cutting neck 35, thereby ensuring the connection stability between the cutting head 34 and the cutting neck 35.

[0052] In addition to the above embodiments, within the scope disclosed in the claims and specification of this invention, the technical features of this invention can be reselected and combined to form new embodiments. These can be achieved by those skilled in the art without creative effort. Therefore, these embodiments not described in detail in this invention should also be regarded as specific embodiments of this invention and within the protection scope of this invention.

Claims

1. A method for processing irregularly shaped undercuts on the sidewalls of a cavity, characterized in that, Includes the following steps: S1. Holes are machined at the locations in the cavity where irregular inverted shapes need to be formed; S2. The side slope of the selected tool has the same slope as the minimum angle on the irregular undercut. S3. Perform transverse cutting on the smallest included angle position on the irregular undercut, and proceed cutting along the axis of the hole; S4. The cutting tool includes an outer edge and an outer side. In the area outside the minimum included angle, first cut laterally to the outer edge to the target position, then rotate with the outer edge as the center to the outer side to the target position, and then proceed to cut along the axis of the hole.

2. The processing method for irregular undercuts on the sidewall of a cavity according to claim 1, characterized in that, The maximum angle position is set on the opposite side of the minimum angle position of the irregular undercut. The tool includes an inner edge angle, the outer edge angle is the same as the angle of the minimum angle position, and the inner edge angle is the same as the angle of the maximum angle position.

3. The processing method for irregular undercuts on the sidewall of a cavity according to claim 2, characterized in that, When cutting at the maximum included angle, the cavity is inverted, and the tool starts cutting laterally from the bottom of the hole, and then proceeds to cut towards the top of the hole along the axis of the hole.

4. The processing method for irregular undercuts on the sidewall of a cavity according to claim 2, characterized in that, Both ends of the cutting head of the tool are provided with connection positions that can connect to the cutting neck. When cutting at the maximum included angle, the tool is installed in reverse and the same machining method as in step S3 is used for machining.

5. A processing method for irregular undercuts on the sidewall of a cavity according to any one of claims 1-4, characterized in that, The cavity is equipped with a conventional undercut. When cutting the conventional undercut, a cutter with no side tilt is used to cut the conventional undercut.

6. A machining tool, applied to the machining method for an irregular undercut on the sidewall of a cavity as described in any one of claims 1-5, characterized in that, It includes a cutting head, which is provided with an inner edge angle and an outer edge angle. An outer side is formed between the inner edge angle and the outer edge angle. The outer side is inclined and when the cutting head end face is in contact with the irregular undercut end face, the outer side is in contact with the irregular undercut sidewall.

7. A machining tool according to claim 6, characterized in that, The cutter head includes a central disk with a plurality of cutting teeth, and the inner edge angle, outer edge angle and outer side are all provided on the cutting teeth.

8. A machining tool according to claim 7, characterized in that, The cutting tooth includes a tooth end face, the width of which is smaller on the side near the inner edge angle than on the side near the outer edge angle.

9. A machining tool according to claim 6, characterized in that, It includes a blade neck connected to a cutting head, a connecting hole on the blade neck, a slot on the end face of the connecting hole, a locking block connected to the slot on the cutting head, and a fastening bolt connected to the cutting head that can pass through the cutting head and connect to the connecting hole.

10. A machining tool according to any one of claims 6-9, characterized in that, The blade neck is connected to the handle on the side away from the blade tip.

Images