Umbrella-shaped back-off die and turning tool and machining method thereof

Abstract

The invention provides an umbrella-shaped back-off die and a turning tool and a machining method thereof, and relates to the technical field of die machining. The umbrella-shaped back-off grinding tool comprises an integrally-formed mold body, a through hole is formed in the middle of the mold body, and two rows of umbrella-shaped grooves are symmetrically distributed in the two sides of the through hole. The die body is integrally formed, so that the surface is smoother, and the defects of burrs, scratches and the like are avoided; meanwhile, the insert fixing and adjusting process is omitted, the size is reduced, and the production efficiency is improved; an umbrella-shaped groove gap is formed between the two rows of umbrella-shaped grooves, the umbrella-shaped groove gap is provided with a first end and a second end, the first end is open and communicated with the outside, waste can be conveniently discharged in the machining process, and blockage is reduced; and the second end is closed, so that the sealing performance of a processing area is ensured, external impurities are prevented from entering, and integrated high-precision and high-quality forming is realized.

Description

Technical Field

[0001] The invention relates to the technical field of mold processing, and in particular to an umbrella-shaped undercut mold and a turning tool and a processing method thereof. Background Art

[0002] In the field of mold processing, for products with complex shapes, the traditional method usually uses a piece-by-piece insert method to process the undercut structure. The undercut structure refers to a feature that is opposite to the demolding direction. Specifically, piece-by-piece inserts are to divide the undercut structure on the product into multiple small pieces, and then process the corresponding inserts for the divided small pieces. Finally, these small inserts are installed in a larger peripheral insert and then assembled to the corresponding position of the mold. During the demolding process, these inserts are moved, slid or disassembled to avoid interference with the undercut structure, thereby ensuring that the product can be demolded smoothly.

[0003] The piece-by-piece insert method requires high assembly accuracy. When a slight error occurs during assembly, it may cause deviation in product size. The joints or misalignment between inserts may cause burrs, scratches or unevenness on the product surface. In addition, in order to fix small inserts, the peripheral inserts need to be designed larger to form a full circle of inner cavities to accommodate and fix the small inserts. This practice not only increases the size and weight of the mold, but also occupies mold space, resulting in some key locations being unable to install inserts due to limited space. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an umbrella-shaped undercut mold and a turning tool and a processing method thereof, which can achieve integrated high-precision and high-quality molding.

[0005] In a first aspect, an embodiment of the present invention provides an umbrella-shaped undercut mold, comprising:

[0006] A mold body, wherein the mold body is integrally formed, and a through hole is provided in the middle of the mold body, and two rows of umbrella-shaped grooves are symmetrically distributed on both sides of the through hole; an umbrella-shaped groove gap is formed between the two rows of umbrella-shaped grooves, and the umbrella-shaped groove gap has a first end and a second end, the first end is open and connected to the outside, and the second end is closed.

[0007] The umbrella-shaped undercut mold according to the embodiment of the present invention has at least the following beneficial effects:

[0008] The umbrella-shaped undercut mold includes an integrally formed mold body, a through hole is provided in the middle of the membrane body, and two rows of umbrella-shaped grooves are symmetrically distributed on both sides of the through hole; the integral forming of the mold body makes the surface smoother and avoids defects such as burrs and scratches; at the same time, the process of fixing and adjusting the inserts is omitted, the volume is reduced, and the production efficiency is improved; an umbrella-shaped groove gap is formed between the two rows of umbrella-shaped grooves, and the umbrella-shaped groove gap has a first end and a second end, the first end is open and connected to the outside, which is convenient for the discharge of waste during processing and reduces blockage; the second end is closed to ensure the sealing of the processing area, prevent external impurities from entering, and realize integrated high-precision and high-quality molding.

[0009] In some embodiments of the present invention, two mold bodies are included, and the two mold bodies are spliced ​​with each other through the surface where the umbrella-shaped groove gap is located to form a cavity, and one end of the cavity is opened to communicate with the outside.

[0010] In a second aspect, an embodiment of the present invention provides a turning tool, comprising a body and a tool head extending from the body, wherein an extending direction of the tool head forms a preset angle with a central axis direction of the body, and the tool head has at least one tool tooth.

[0011] The turning tool according to the embodiment of the present invention has at least the following beneficial effects:

[0012] The turning tool includes a main body and a cutter head extending from the main body. The extension direction of the cutter head is at a preset angle to the central axis direction of the main body, so that the cutter head can form an umbrella-shaped groove during the rotational cutting process. By adjusting the size of the preset angle, it can adapt to different processing requirements; the cutter head has at least one cutter tooth, and by adjusting the number of cutter heads, the cutting efficiency can be improved.

[0013] In some embodiments of the present invention, the cutter head has at least two cutter teeth, and each of the cutter teeth is arranged in parallel and spaced apart by a preset distance.

[0014] In some embodiments of the present invention, the turning tool further comprises a wire withdrawal groove, wherein the wire withdrawal groove is arranged within a preset distance between two adjacent cutting teeth and is located at the junction of the cutting teeth and the body.

[0015] In some embodiments of the present invention, the cutter tooth has a cutting surface, and the cutting surface is located at the outer edge of the side surface of the cutter tooth.

[0016] In some embodiments of the present invention, the turning tool has two cutter heads, the two cutter heads are symmetrically distributed along the central axis of the body, and the cutting surfaces of the teeth of the two cutter heads face in opposite directions.

[0017] In some embodiments of the present invention, the dimension of the blade tooth at one end away from the body is smaller than the dimension of the blade tooth at one end close to the body.

[0018] In a third aspect, an embodiment of the present invention provides a method for processing an umbrella-shaped undercut grinding tool, using the turning tool described in the second aspect, comprising:

[0019] The turning tool is pressed against the electrode to be processed, and cutting is performed by relative rotation between the turning tool and the electrode to be processed; the turning tool is repeatedly moved and cutting is performed according to preset cutting parameters until the cutting process of the electrode to be processed is completed to form an electrode body; the electrode body is removed along its axial direction to form a target electrode;

[0020] The target electrode is fixedly connected to the rotating machining axis of the electric spark machine and abuts against the workpiece to be machined; the rotating machining axis drives the target electrode to rotate, and the workpiece to be machined is etched by electric spark discharge to form an umbrella-shaped undercut mold.

[0021] The processing method of the umbrella-shaped undercut abrasive tool according to the embodiment of the present invention has at least the following beneficial effects:

[0022] By placing the turning tool against the electrode to be processed, cutting is performed by utilizing the relative rotation of the turning tool and the electrode, and the turning tool is repeatedly moved according to the preset cutting parameters, the electrode body is gradually formed; then, removal processing is performed along the axial direction of the electrode body to form a high-precision target electrode. After the target electrode is fixedly connected to the rotating machining axis of the EDM machine, it is placed against the workpiece to be processed, and the target electrode is driven to rotate by the rotating machining axis, and the EDM discharge is used for transfer etching, and finally an umbrella-shaped undercut mold is formed. This method achieves high-precision transfer etching through the combination of turning tool cutting and EDM machining, which is suitable for the forming of umbrella-shaped undercut structures, optimizes the mold design, ensures that the mold surface is smooth and burr-free, and improves precision and quality.

[0023] In some embodiments of the present invention, the turning tool is repeatedly moved and cut according to preset cutting parameters until the cutting process of the electrode to be processed is completed, including:

[0024] Determine preset turning parameters; wherein the preset turning parameters include a processing start point, a processing end point and a moving distance;

[0025] The turning tool performs turning from the processing starting point, and after each turning is completed, the turning tool moves according to the moving distance and repeats the turning;

[0026] When the turning tool reaches the machining end point, the turning tool stops turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the mold structure of an umbrella-shaped undercut mold provided by one embodiment of the present invention;

[0028] Figure 2It is a schematic diagram of the structure of two phantoms used in combination according to an embodiment of the present invention;

[0029] Figure 3 1. It is a front view and a side view of a double-tooth turning tool provided by an embodiment of the present invention;

[0030] Figure 4 is a front view of a cutter tooth provided by an embodiment of the present invention;

[0031] Figure 5 is a side view of a cutter tooth provided by an embodiment of the present invention;

[0032] Figure 6 is a schematic structural diagram of a multi-tooth turning tool provided by an embodiment of the present invention;

[0033] Figure 7 It is a flow chart of a method for processing an umbrella-shaped undercut mold provided by one embodiment of the present invention;

[0034] Figure 8 is a schematic diagram of a turning tool cutting electrode provided by one embodiment of the present invention;

[0035] Fig. 9 is a schematic diagram of a target electrode provided by an embodiment of the present invention;

[0036] Fig.10 It is a schematic diagram of a target electrode etching a workpiece to be processed provided by an embodiment of the present invention;

[0037] Fig.11 yes Figure 7 Flow chart of step S11 in FIG.

[0038] Reference numerals

[0039] Umbrella-shaped undercut mold 100, mold body 110, through hole 120, umbrella-shaped groove 130, umbrella-shaped groove gap 140, turning tool 200, body 210, tool head 220, tool teeth 221, withdrawal groove 222, cutting surface 223, electrode body 300, target electrode 310, and workpiece 400 to be processed. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0044] The embodiments of the present invention provide an umbrella-shaped inverted mold, a turning tool, and a processing method for an umbrella-shaped inverted mold. The mold body is formed as one piece, a through hole is provided in the middle of the membrane body, and two rows of umbrella-shaped grooves are symmetrically distributed on both sides of the through hole, so that the surface is smoother and defects such as burrs and scratches are avoided; at the same time, the process of fixing and adjusting the inserts is omitted, the volume is reduced, and the production efficiency is improved; an umbrella-shaped groove gap is formed between the two rows of umbrella-shaped grooves, and the umbrella-shaped groove gap has a first end and a second end, the first end is open and connected to the outside, which is convenient for the discharge of waste during processing and reduces blockage; the second end is closed to ensure the sealing of the processing area, prevent external impurities from entering, and achieve integrated high-precision and high-quality molding.

[0045] Based on the accompanying drawings, an umbrella-shaped undercut mold according to an embodiment of the present invention is further described below.

[0046] The umbrella-shaped undercut mold 100 provided in accordance with the first aspect of the present invention comprises:

[0047] The mold body 110 is integrally formed, and a through hole 120 is provided in the middle of the mold body 110, and two rows of umbrella-shaped grooves 130 are symmetrically distributed on both sides of the through hole 120; an umbrella-shaped groove gap 140 is formed between the two rows of umbrella-shaped grooves 130, and the umbrella-shaped groove gap 140 has a first end and a second end, the first end is open and connected to the outside, and the second end is closed.

[0048] It is understandable that the integrally formed mold body 110 is manufactured by using an electrospark machining (EDM) process. The workpiece 400 to be processed is precisely machined by means of electrospark discharge, and a pulse discharge between the electrode and the workpiece 400 is used to generate a high temperature, so that the workpiece material is partially melted or gasified, thereby achieving material removal and realizing the integral molding of the mold body 110. By using the EDM process, the hardness and precision of the mold can be significantly improved; at the same time, the dimensional deviation or surface defects caused by assembly errors of traditional piece-by-piece inserts can be avoided.

[0049] It is understandable that, referring to Figure 1 The two rows of umbrella-shaped grooves 130 and the umbrella-shaped groove gap 140 therebetween together constitute the core processing area of ​​the mold, which is specially used for processing products with umbrella-shaped undercut structures. The first end of the umbrella-shaped groove gap 140 is open and connected to the outside to facilitate the discharge of chips, while the second end is closed to ensure the sealing of the processing area and prevent external impurities from entering. This not only provides sufficient space for the processing process, but also ensures smooth chip discharge in the processing area, avoiding processing defects caused by chip accumulation.

[0050] It is understandable that, referring to Figure 1 Through the through hole 120 located in the middle of the mold body 110, the electro-etching products can be quickly discharged from the processing area to avoid their accumulation in the processing gap, thereby ensuring the continuity and stability of the discharge process; in addition, it also effectively reduces the processing defects caused by the blockage of electro-etching products, such as increased surface roughness or decreased dimensional accuracy.

[0051] It is understandable that the umbrella-shaped undercut mold 100 is manufactured by an EDM process, and the workpiece 400 to be processed is subjected to transfer etching by the target electrode 310 to form the umbrella-shaped undercut mold 100. The target electrode 310 is formed by rotating the electrode to be processed by the turning tool 200. During the turning process, the high-precision processing of the turning tool 200 ensures the shape and size accuracy of the target electrode 310, thereby providing a high-quality electrode foundation for the subsequent EDM process.

[0052] According to the umbrella-shaped inverted mold 100 of the embodiment of the present invention, the mold body 110 is integrally formed to make the surface of the mold body 110 smoother, avoiding defects such as burrs and scratches; at the same time, the process of fixing and adjusting the inserts is omitted, the volume is reduced, the production efficiency is improved, and integrated high-precision and high-quality molding is achieved.

[0053] In some embodiments of the present invention, two mold bodies 110 are included. The two mold bodies 110 are spliced ​​together through the surface where the umbrella-shaped groove gap 140 is located to form a cavity, and one end of the cavity is opened to communicate with the outside.

[0054] It is understandable that, referring to Figure 2 In one embodiment, when using the umbrella-shaped undercut mold 100 to process a product having an umbrella-shaped undercut structure, an internal cavity is formed in the mold by splicing the surfaces where the umbrella-shaped groove gap 140 of the two mold bodies 110 are located. One end of the cavity is a closed end, and the other end is an open end and communicates with the outside. The closed end can ensure that the plastic material can evenly fill the cavity during the injection molding process to avoid material leakage or insufficient filling; while the open end is used for exhaust and injection of injection molding material, ensuring that air and excess material can be smoothly discharged during the molding process, thereby avoiding the generation of bubbles or defects.

[0055] The turning tool 200 provided in accordance with the second aspect of the embodiment of the present invention comprises a body 210 and a tool head 220 extending from the body 210 . The extending direction of the tool head 220 forms a preset angle with the central axis direction of the body 210 . The tool head 220 has at least one tool tooth 221 .

[0056] It is understandable that, referring to Figure 3 , the cutter head 220 and the body 210 are of an integrated design, the cutter head 220 extends from the body 210, and the extension direction of the cutter head 220 is at a preset angle to the central axis direction of the body 210. The extension direction of the cutter head 220 refers to the specific orientation and inclination angle of the cutter head 220 extending from the body 210, and the extension direction of the cutter head 220 determines the movement trajectory and cutting effect of the cutter head 220 during the cutting process; the central axis of the body 210 refers to the symmetric center line of the structure of the body 210, and the preset angle refers to the specific angle formed between the extension direction of the cutter head 220 and the central axis of the body 210. Specifically, two complementary angles (one acute angle and one obtuse angle) are formed between the extension direction of the cutter head 220 and the central axis of the body 210, wherein the angle value corresponding to the acute angle is the preset angle. It should be noted that the preset angle does not limit the specific angle value, but refers to the angle range of the acute angle being greater than 0 degrees and less than 90 degrees.

[0057] It should be noted that when processing the target electrode 310, the size of the preset angle can be adjusted according to the actual processing requirements. When the curvature of the umbrella-shaped groove 130 to be processed is large, the preset angle can be increased accordingly, so that the cutting trajectory of the tool head 220 is more in line with the design requirements of the umbrella-shaped curvature; conversely, when the curvature of the umbrella-shaped groove 130 is small, the preset angle can be appropriately reduced. This enables the turning tool 200 to adapt to the processing requirements of different shapes and sizes, and improves the versatility and precision of the processing.

[0058] It is understandable that, referring to Figure 3, the cutter head 220 has at least one cutting tooth 221. In one embodiment, when the cutter head 220 is designed with a single cutting tooth 221 structure, the extending direction of the cutting tooth 221 is consistent with the extending direction of the cutter head 220. By controlling the cutter head 220 to move multiple times at equal distances, the uniformly distributed umbrella-shaped grooves 130 can be cut. It should be noted that the moving distance of the cutter head 220 can be adjusted according to actual processing requirements. It can either move at equal distances to form uniformly distributed umbrella-shaped grooves 130, or move non-equidistantly according to specific design requirements to meet the processing requirements of different shapes or sizes. This enables the tool to adapt to a variety of processing scenarios while ensuring high-precision and high-efficiency cutting effects.

[0059] It can be understood that, referring to Figure 3 and Figure 6 , the number of cutting teeth 221 can be designed to match the number of umbrella-shaped grooves 130. Specifically, when the number of umbrella-shaped grooves 130 required for the product is equal to the number of cutting teeth 221, the umbrella-shaped grooves 130 can be directly formed by a one-time cutting process without multiple displacements of the cutter head 220. This not only optimizes the processing flow, improves production efficiency, but also ensures the consistency of the distribution of the umbrella-shaped grooves 130. In one embodiment, when a product with an umbrella-shaped inverted structure needs to process 5 equally spaced umbrella-shaped grooves 130, the turning tool 200 can be designed with a structure having 5 equally spaced cutting teeth 221. After using this turning tool 200 to process the electrode, and then using electrode electro-erosion, the one-time precise forming of the mold can be achieved.

[0060] According to the turning tool 200 of the embodiment of the present invention, the turning tool 200 includes a body 210 and a cutter head 220 extending from the body 210. The extending direction of the cutter head 220 forms a preset angle with the central axis direction of the body 210, so that the cutter head 220 can form umbrella-shaped grooves 130 during rotational cutting. By adjusting the size of the preset angle, different processing requirements can be adapted; the cutter head 220 has at least one cutting tooth 221, and by adjusting the number of cutter heads 220, the cutting efficiency can be improved.

[0061] In some embodiments of the present invention, the cutter head 220 has at least two cutting teeth 221, and each cutting tooth 221 is arranged in parallel in sequence and spaced a preset distance apart.

[0062] It can be understood that, referring to Figure 4, the setting of the preset distance affects the shape of the umbrella-shaped structure of the final product. When the preset distance between each tooth 221 in the turning tool 200 is larger, it means that the umbrella-shaped structure turned out is thicker, and when the preset distance between each tooth 221 in the turning tool 200 is smaller, it means that the umbrella-shaped structure turned out is thinner. Therefore, the size of the preset distance can be adjusted according to actual needs. In one embodiment, when the umbrella-shaped structures of the product are evenly arranged at equal distances, and the cutter head 220 has only one tooth 221, the preset distance is actually equal to the moving distance of the tooth 221; in another embodiment, the value of the preset distance is 8 mm, that is, the thickness of each umbrella-shaped groove formed by turning is also 8 mm.

[0063] In some embodiments of the present invention, the turning tool 200 further includes a wire withdrawal groove 222 . The wire withdrawal groove 222 is disposed within a preset distance between two adjacent cutting teeth 221 and is located at the junction of the cutting teeth 221 and the body 210 .

[0064] It is understandable that, referring to Figure 4 The wire withdrawal groove 222 refers to a groove structure machined on the turning tool 200, which is located within a preset distance between two adjacent teeth 221, and is specifically set at the position where the teeth 221 meet the tool body 210. During the process of the turning tool 200 cutting the electrode to be machined, the wire withdrawal groove 222 provides a smooth discharge channel for the chips, preventing the chips from accumulating between the teeth 221 and affecting the machining accuracy and surface quality. At the same time, by providing additional space, the wire withdrawal groove 222 can effectively reduce the friction resistance between the teeth 221 and the electrode to be machined during the cutting process, thereby improving the cutting efficiency.

[0065] In some embodiments of the present invention, the blade tooth 221 has a cutting surface 223 , and the cutting surface 223 is located at the outer edge of the side surface of the blade tooth 221 .

[0066] It is understandable that, referring to Figure 4 The cutting surface 223 refers to the surface on the outer edge of the side of the tooth 221 that directly contacts the electrode to be processed and completes the cutting action. The angle between the cutting surface 223 and the movement direction of the turning tool 200 is the cutting angle. In one embodiment, the cutting angle of the cutting surface 223 is designed to be 10 degrees. Specifically, the cutting angle of 10 degrees allows the tooth 221 to contact the electrode to be processed at a smaller cutting angle during the cutting process, thereby reducing the cutting force, reducing the vibration during the processing, and helping to extend the service life of the turning tool 200.

[0067] In another embodiment, the design range of the cutting angle can be further expanded to between 8 and 12 degrees. The cutting angle within this range can adapt to different processing conditions while ensuring a smaller cutting angle. For example, when the cutting angle is 8 degrees, the cutting angle of the cutter tooth 221 is smaller, which is suitable for processing materials with higher hardness and can reduce cutting resistance; and when the cutting angle is 12 degrees, the cutting angle of the cutter tooth 221 is slightly larger, which is suitable for processing softer or tougher materials, helping to improve cutting efficiency and reduce tool wear. By controlling the cutting angle between 8 and 12 degrees, the cutting performance can be optimized in different processing scenarios while taking into account the durability and processing stability of the turning tool 200.

[0068] In some embodiments of the present invention, the turning tool 200 has two cutter heads 220 , which are symmetrically distributed along the central axis of the body 210 , and the cutting surfaces 223 of the teeth 221 of the two cutter heads 220 face in opposite directions.

[0069] It is understandable that, referring to Figure 3 Two symmetrical cutter heads 220 are arranged on the same body 210, and the cutting surfaces 223 of the two cutter heads 220 face in opposite directions, so that the turning tool 200 can perform bidirectional cutting. When the cutter head 220 on one side is damaged due to long-term use or accidental damage, the cutter head 220 on the other side can still be used without the need to immediately replace the tool, thereby reducing downtime and production costs. At the same time, the bidirectional cutting function can also maximize the use of workpiece materials and reduce material waste. In one embodiment, the tool is made of Assab17 white steel bar, which has good toughness and is not easy to break.

[0070] In some embodiments of the present invention, the size of the end of the blade tooth 221 away from the body 210 is smaller than the size of the end of the blade tooth 221 close to the body 210 .

[0071] It is understandable that, referring to Figure 4 and Figure 5 The size of the end of the tooth 221 away from the body 210 is smaller. The size here refers to the lateral width and longitudinal thickness of the tooth, that is, the lateral width of the end of the tooth away from the body is smaller than the lateral width of the end close to the body, and the longitudinal thickness of the end of the tooth away from the body is smaller than the longitudinal thickness of the end close to the body, so that the tooth 221 can contact the material with a smaller contact area when cutting into the workpiece, effectively reducing the cutting resistance and reducing the heat and vibration generated during the cutting process. At the same time, since the size of the tooth 221 gradually decreases from the end close to the body 210 to the end away from the body 210, the chips will naturally flow outward during the formation process, avoiding processing defects or tool damage caused by chip accumulation. In addition, the size of the end of the tooth 221 away from the body 210 is smaller, so that the tool can more accurately control the cutting depth and shape during the processing.

[0072] It should be noted that, refer to Figure 5 The arc-shaped transition structure is used at the connection between the end of the cutter head 220 close to the body 210 and the body 210. Specifically, the arc-shaped transition structure forms a smooth connection area between the cutter head 220 and the body 210, which can effectively disperse the stress generated during the cutting process and avoid the breakage or damage of the tool due to stress concentration. In addition, the arc-shaped transition structure also forms a natural chip groove, so that the chips can be discharged from the cutting area more smoothly. During the cutting process, the chips will flow outward along the arc surface, avoiding processing defects or tool damage caused by chip accumulation.

[0073] Reference Figure 7 According to a third aspect of the present invention, a method for processing an umbrella-shaped undercut abrasive tool is provided, using the turning tool 200 of the second aspect, comprising:

[0074] S11, placing the turning tool against the electrode to be processed, and cutting by relative rotation between the turning tool and the electrode to be processed; repeatedly moving the turning tool and cutting according to preset cutting parameters until the cutting of the electrode to be processed is completed to form an electrode body; removing the electrode body along its axial direction to form a target electrode;

[0075] S12, the target electrode is fixedly connected to the rotating machining axis of the electric spark machine and abuts against the workpiece to be machined; the rotating machining axis drives the target electrode to rotate, and the workpiece to be machined is etched by electric spark discharge to form an umbrella-shaped undercut mold.

[0076] It is understandable that, referring to Figure 8 In S11, cutting is performed by relative rotation of the turning tool 200 and the electrode to be processed, and it is not limited here which part is rotated. Specifically, the turning tool 200 can be fixed and the electrode to be processed can be rotated to achieve cutting; or the electrode to be processed can be fixed and the turning tool 200 can be rotated to achieve cutting. In one embodiment, the turning tool 200 is fixed and the electrode to be processed is rotated, and the rotating electrode can evenly receive the cutting force.

[0077] It is understandable that, referring to Figure 6In step S11, when the number of the blade teeth 221 is equal to the number of the umbrella-shaped grooves 130 of the product, only one cutting is required to form the integral part. In one embodiment, if the number of the umbrella-shaped grooves 130 of the product is five, and the number of the blade teeth 221 of the turning tool 200 is also five, the processing of all the grooves can be completed at the same time by one cutting. Only when the number of the blade teeth 221 is less than the number of the umbrella-shaped grooves 130 of the product, repeated movement and cutting are required. Due to the insufficient number of blade teeth 221, it is impossible to complete the processing of all the umbrella-shaped grooves 130 at the same time in one cutting, so it is necessary to gradually complete the forming of all the grooves through multiple movements and cutting. In another embodiment, if the number of the umbrella-shaped grooves 130 of the product is six, and the number of the blade teeth 221 of the turning tool 200 is two, three cuttings are required, each time cutting two grooves, and full coverage is achieved by moving the position of the turning tool 200. It should be noted that when the number and size of the blade teeth 221 are different, the moving distance is also different.

[0078] It is understandable that, referring to Fig. 9 In S11, the electrode body 300 is first turned by the turning tool 200 to preliminarily form the basic geometric shape of the electrode. However, after the turning process is completed, the electrode body 300 still needs to be further removed along its axial direction to finally form the target electrode 310. Specifically, the first cut is made along the axial direction of the electrode body 300 to remove part of the material. On the basis of the first cut, a second cut is made along the axial direction to form a certain angle relationship with the first cut; after two cuts, the electrode body 300 is processed into a columnar structure with an angle of 150 degrees. That is to say, the angle between the two cuts is 150 degrees, and the rest is cut off; through the above two axial cuts, the electrode body 300 is precisely processed into the required 150-degree columnar structure.

[0079] It should be noted that when the electrode body 300 is subjected to removal processing along its axial direction, the radius of the electrode root is increased through a specific processing strategy, thereby forming a geometric shape that gradually becomes thicker near the root. The main purpose of this root reinforcement structure is to enhance the hardness of the electrode root and prevent the problem of breakage during processing or use. It should be noted that the root reinforcement structure adopts a smooth geometric transition (such as an arc or a cone) to avoid sharp corners or sudden changes in cross-section.

[0080] It is understandable that, referring to Fig.10In S12, the connection between the target electrode 310 and the rotating machining axis must be stable to prevent position deviation or machining defects caused by vibration or looseness during machining; the initial contact pressure between the target electrode 310 and the workpiece 400 to be machined must be moderate. Excessive pressure may cause damage to the electrode or the workpiece, while too little pressure may affect the discharge stability. In one embodiment, the electrode is an EDM4 electrode.

[0081] Through step S11 to step S12, the electrode body 300 is gradually formed by placing the turning tool 200 against the electrode to be processed, cutting is performed by relative rotation between the turning tool 200 and the electrode, and the turning tool 200 is repeatedly moved according to preset cutting parameters; then, removal processing is performed along the axial direction of the electrode body 300 to form a high-precision target electrode 310. After the target electrode 310 is fixedly connected to the rotating machining axis of the electric discharge machine, it is placed against the workpiece 400 to be processed, and the target electrode 310 is driven to rotate by the rotating machining axis, and the electric spark discharge is used for etching processing, and finally an umbrella-shaped undercut mold 100 is formed. This method realizes high-precision etching by combining cutting with the turning tool 200 and electric spark machining, is suitable for the molding of umbrella-shaped undercut structures, optimizes mold design, ensures that the mold surface is smooth and burr-free, and improves precision and quality.

[0082] In one embodiment, referring to Fig.11 ,exist Figure 7 Step S11 of the illustrated embodiment also includes but is not limited to the following steps:

[0083] S21, determining preset turning parameters; wherein the preset turning parameters include a processing start point, a processing end point, and a moving distance;

[0084] S22, the turning tool performs turning from the processing starting point. After each turning is completed, the turning tool moves according to the moving distance and repeats the turning;

[0085] S23, when the turning tool reaches the machining end point, the turning tool stops turning.

[0086] It is understandable that in step S21, the processing starting point refers to the starting position of the turning process, which is usually determined according to the initial shape and size of the workpiece. The selection of the processing starting point needs to ensure that the turning tool 200 can smoothly cut into the workpiece to avoid vibration or impact. The processing end point refers to the end position of the turning process, which is usually determined according to the final size and shape of the target electrode 310. The selection of the processing end point needs to ensure that the workpiece meets the design requirements after turning. The moving distance refers to the distance that the turning tool 200 moves along the axial direction of the workpiece after each turning. By presetting these parameters, the turning process is ensured.

[0087] It is understandable that in step S22, the turning tool 200 starts from the processing starting point and performs the first turning on the workpiece to form a preliminary contour; after each turning is completed, the turning tool 200 moves according to the preset moving distance, and then performs the next turning. The displacement direction is along the axial direction (along the length direction of the workpiece); in each turning process, the cutting depth, feed speed and cutting speed need to be controlled to ensure the processing accuracy and surface quality. Through repeated turning and displacement, the workpiece is gradually processed to the target shape and size, while avoiding tool wear or workpiece deformation caused by one-time cutting too deep.

[0088] It is understandable that in step S23, after confirming that the turning tool 200 has reached the processing end point, the relative rotation and feeding motion need to be stopped quickly to avoid over-processing or equipment damage caused by delayed stopping. When the turning tool 200 reaches the processing end point, it means that the turning process is completed and the electrode body 300 is obtained. The turning tool 200 needs to be moved to the processing starting point again to prepare for the next electrode turning process.

[0089] Through step S21 to step S23, first determine the preset turning parameters, including the processing starting point, processing end point and moving distance. The setting of the processing starting point, processing end point and moving distance needs to take into account the processing requirements of the electrode to be processed. The turning tool 200 starts turning from the processing starting point. After each turning operation, it is displaced according to the preset moving distance and the turning operation is repeated. This step-by-step turning method can avoid tool wear or workpiece deformation caused by cutting too much material at one time. The turning effect needs to be checked after each displacement to ensure the processing quality, and the turning depth and feed speed are controlled at the same time to avoid tool damage or workpiece surface defects caused by excessive cutting force. When the turning tool 200 reaches the processing end point after multiple displacements and turning operations, the turning tool 200 stops turning, indicating the completion of the processing.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0091] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An umbrella-shaped inverted mold, characterized in that: include: A mold body, wherein the mold body is integrally formed, and a through hole is provided in the middle of the mold body, and two rows of umbrella-shaped grooves are symmetrically distributed on both sides of the through hole; an umbrella-shaped groove gap is formed between the two rows of umbrella-shaped grooves, and the umbrella-shaped groove gap has a first end and a second end, the first end is open and connected to the outside, and the second end is closed.

2. The umbrella-shaped undercut mold according to claim 1, characterized in that: The two mold bodies are connected to each other through the surface where the gap of the umbrella-shaped groove is located to form a cavity, and one end of the cavity is opened to communicate with the outside.

3. A turning tool, characterized in that: It comprises a body and a cutter head extending from the body, wherein the extending direction of the cutter head forms a preset angle with the central axis direction of the body, and the cutter head has at least one cutter tooth.

4. The turning tool according to claim 3, characterized in that: The cutter head has at least two cutter teeth, and each of the cutter teeth is arranged in parallel and spaced apart by a preset distance.

5. The turning tool according to claim 4, characterized in that: The turning tool further comprises a wire withdrawal groove, which is arranged within a preset distance between two adjacent cutting teeth and is located at the junction of the cutting teeth and the body.

6. The turning tool according to claim 3, characterized in that: The cutter tooth has a cutting surface, and the cutting surface is located at the outer edge of the side surface of the cutter tooth.

7. The turning tool according to claim 6, characterized in that: The turning tool has two cutter heads, which are symmetrically distributed along the central axis of the body, and the cutting surfaces of the teeth of the two cutter heads face in opposite directions.

8. The turning tool according to claim 3, characterized in that: The dimension of the blade tooth at one end away from the body is smaller than the dimension of the blade tooth at one end close to the body.

9. A method for processing an umbrella-shaped undercut mold, characterized in that: The turning tool according to any one of claims 3 to 8 comprises: The turning tool is pressed against the electrode to be processed, and cutting is performed by relative rotation between the turning tool and the electrode to be processed; the turning tool is repeatedly moved and cutting is performed according to preset cutting parameters until the cutting process of the electrode to be processed is completed to form an electrode body; the electrode body is removed along its axial direction to form a target electrode; The target electrode is fixedly connected to the rotating machining axis of the electric spark machine and abuts against the workpiece to be machined; the rotating machining axis drives the target electrode to rotate, and the workpiece to be machined is etched by electric spark discharge to form an umbrella-shaped undercut mold.

10. The method for processing an umbrella-shaped undercut mold according to claim 9, characterized in that: According to the preset cutting parameters, the turning tool is repeatedly moved and cutting is performed until the cutting process of the electrode to be processed is completed, including: Determine preset turning parameters; wherein the preset turning parameters include a processing start point, a processing end point and a moving distance; The turning tool performs turning from the processing starting point, and after each turning is completed, the turning tool moves according to the moving distance and repeats the turning; When the turning tool reaches the machining end point, the turning tool stops turning.

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