A wire sawing groove device and method

Abstract

The application belongs to the field of mechanical processing and discloses a slot cutting device and method for linear cutting. The device comprises a base, a polygonal turnover body and a multi-station mandrel. The polygonal turnover body is arranged on the base and can realize linear cutting of parts in different angular directions through turnover. The multi-station mandrel is provided with multiple stations arranged in an array on the end face. When the multi-station mandrel is turned to any angular direction of the nut to be machined, multiple columns of stations are formed, and each column of stations comprises at least two stations. After machining of a pair of slots is completed, the polygonal turnover body only needs to be turned, so that machining of other angular directions of the nut to be machined is realized. The device can complete linear cutting of multiple parts at one time, meets the demand of batch production and greatly improves the machining efficiency. In addition, the stations of the device are arranged in an array in a special manner. During linear cutting, the polygonal turnover body only needs to be turned, so that angular adjustment of multiple parts can be realized at one time.

Description

Technical Field

[0001] This invention belongs to the field of machining, specifically relating to wire EDM, and particularly to a grooving device and method for wire EDM. Background Technology

[0002] The current state of machining slotted nuts, widely used in the aerospace industry, still faces numerous challenges, particularly in improving production efficiency and maintaining high precision. These slotted nuts are typically characterized by six evenly distributed slots on their end face. This structure not only demands extremely high manufacturing precision but also places stringent requirements on production efficiency due to their diverse specifications and large demand.

[0003] Traditional machining methods for slotted nuts often employ a single-piece machining model, which proves inadequate for large-scale production demands. This is particularly true for six-slot nuts, where each part requires three clamping operations to form the slots. This not only increases worker complexity but also significantly extends the time spent on ineffective operations such as clamping, positioning, and adjustment, resulting in substantial wasted time. Furthermore, frequent clamping increases the risk of part damage, affecting the overall quality consistency of the finished product and further exacerbating production delays. Clearly, existing machining methods are insufficient to meet the demands of modern aerospace manufacturing for efficient and high-quality production, becoming a key factor restricting production efficiency and cost control.

[0004] Therefore, it is evident that the existing processing method for wire EDM machining of slotted nuts can only process one slotted nut at a time and requires multiple clamping of the part, resulting in low processing efficiency and seriously affecting the production schedule. Summary of the Invention

[0005] This invention provides a grooving device and method for wire EDM to solve the technical problem that, in wire EDM processing of slotted nuts, existing processing methods can only process one slotted nut at a time and require multiple clamping of the part, resulting in low processing efficiency and seriously affecting production progress.

[0006] To achieve the above objectives, the present invention employs the following technical content:

[0007] A grooving device for wire EDM includes a base;

[0008] A polygonal flipper, which is set on the base, can realize wire cutting of the grooved nut to be processed in different angular directions by flipping the polygonal flipper;

[0009] A multi-station mandrel is inserted and fixed onto the polygonal flipping body and is arranged parallel to the base. The end face of the multi-station mandrel is provided with multiple stations arranged in an array. When the multi-station mandrel is flipped to any angle of the grooved nut to be processed, multiple rows of stations are formed, and each row of stations includes at least two stations. The stations of the multi-station mandrel are used to install the grooved nut to be processed.

[0010] Furthermore, the base is provided with a positioning boss; the polygonal flipping body includes multiple positioning surfaces, and each positioning surface is provided with a positioning groove that cooperates with the positioning boss.

[0011] Furthermore, the polygonal flipping body adopts an oriented triangular sleeve; the interior of the oriented triangular sleeve has a hole for inserting the multi-station mandrel; the oriented triangular sleeve and the multi-station mandrel are fixed by a threaded connection.

[0012] Furthermore, the directional three-sided sleeve includes three positioning surfaces, which are arranged at 120° intervals between adjacent positioning surfaces; each positioning surface has a cross groove; the base is provided with a T-shaped boss; when the directional three-sided sleeve is flipped to any positioning surface as the bottom surface, the cross groove of the corresponding positioning surface and the T-shaped boss form a positioning engagement.

[0013] Furthermore, the stations on the end face of the multi-station mandrel are arranged in a hexagonal matrix, wherein one station is arranged at each vertex of the hexagon and one station is arranged at the geometric center.

[0014] Furthermore, the workstation adopts a convex column structure, the shape of which corresponds to the inner hole shape of the grooved nut to be processed; when wire cutting is performed, the grooved nut to be processed is sleeved and fixed on the convex column structure.

[0015] Furthermore, the workstation adopts a convex column structure, and the end of the multi-station mandrel near the workstation is provided with an alignment mark, which is used for alignment during wire cutting operations.

[0016] Furthermore, the base is provided with a polygonal flipping body and a multi-station mandrel inserted in the polygonal flipping body at both ends, and a through hole for fixing to the cutting table is provided in the middle of the base.

[0017] A wire cutting method for slotted nuts, based on the aforementioned wire cutting grooving device, includes:

[0018] Insert the multi-station mandrel into the polygonal flip body and fix it in place;

[0019] Install multiple slotted nuts to be processed on the workstation of a multi-station mandrel;

[0020] Place the polygonal flipper on the base;

[0021] The wire cutting operation is performed sequentially on the slotted nuts to be processed at each workstation to complete the wire cutting of one angle of the slotted nuts to be processed;

[0022] Flip the polygonal body while keeping the wire cutting direction unchanged, and then perform wire cutting operations on the slotted nuts to be processed at each workstation in sequence.

[0023] Repeat the above polygon flipping process and wire cutting operation until the wire cutting of each angle of the groove nut to be processed is completed.

[0024] Further, insert the multi-station mandrel into the directional three-way sleeve, so that the alignment mark on the multi-station mandrel is parallel to the base and perpendicular to the wire cutting wire. After alignment, use clamping screws to fix the multi-station mandrel to the directional three-way sleeve.

[0025] Install the end faces of multiple slotted nuts to be processed close to the bottom surface of the multi-station mandrel;

[0026] The first pair of slots is processed by wire cutting on each row of workstations.

[0027] Flip the directional three-sided sleeve 120°, and then perform wire cutting on the slotted nuts to be processed on each workstation in turn to realize the processing of the second pair of slots;

[0028] Continue to rotate the orientation three-sided sleeve 120°, and continue to perform wire cutting operations on the slotted nuts to be processed at each station in turn to achieve the processing of the third pair of slots, resulting in multiple hexagonal slotted nuts.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] This invention provides a grooving device for wire EDM. The device includes a base, a polygonal flipping body, and a multi-station mandrel. The polygonal flipping body is mounted on the base and can achieve wire cutting of parts at different angles by flipping it. The multi-station mandrel has multiple stations arranged in an array on its end face. When the multi-station mandrel is flipped to any angle of the grooved nut to be processed, multiple rows of stations are formed, each row including at least two stations. After processing a pair of grooves, there is no need to reclamp; simply flipping the polygonal flipping body allows for processing of other angles of the grooved nut. Furthermore, this device can complete wire cutting of multiple parts at once, meeting the needs of mass production and greatly improving processing efficiency. In addition, due to the special array arrangement of the stations, during wire cutting, there is no need to flip the parts to adjust the groove angle; simply flipping the polygonal flipping body allows for simultaneous adjustment of the angles of multiple parts while maintaining the center position. This results in high precision and stable quality of the processed parts, reducing operational errors and ensuring product processing quality. The device has a simple structure and principle, is easy to operate and maintain, and has good application value.

[0031] Preferably, in this invention, by setting a positioning boss on the base and opening a positioning groove on each positioning surface of the polygonal flip body that matches the positioning boss, the stability and accuracy of the polygonal flip body on the base are ensured, and the processing accuracy is improved.

[0032] Preferably, in this invention, a directional triangular sleeve is used as a polygonal flipping body, and a multi-station mandrel is fixed by a threaded connection, which makes the device structure more compact and stable, and easy to disassemble and replace, thus improving the versatility and flexibility of the device.

[0033] More preferably, in this invention, the design of the directional three-sided sleeve includes three positioning surfaces, each with a cross groove that forms a positioning fit with the T-shaped boss on the base, further improving the positioning accuracy and stability of the polygonal flip body on the base and ensuring processing quality.

[0034] Preferably, in this invention, the workstations on the end face of the multi-station mandrel are arranged in a hexagonal matrix, which optimizes the workstation layout, improves space utilization, and allows more nuts to be processed simultaneously, further improving production efficiency. Here, the workstations can be arranged in multiples of 6, which is the same principle as the hexagonal matrix, maximizing processing efficiency while ensuring processing quality.

[0035] Preferably, in this invention, the workstation adopts a convex column structure, which corresponds to the inner hole shape of the groove nut to be processed, ensuring the stability and accuracy of the nut at the workstation, avoiding shaking and deviation during processing, and improving processing quality.

[0036] Preferably, in this invention, an alignment mark is provided on the end of the multi-station mandrel near the station, which facilitates alignment during wire cutting operations, ensures the accuracy of the cutting direction, and improves processing precision and efficiency.

[0037] Preferably, in this invention, the base is provided with a polygonal flipping body and a multi-station mandrel inserted in the polygonal flipping body at both ends, which enables the device to perform bidirectional wire cutting operations simultaneously, further improving processing efficiency; and the through hole in the middle of the base facilitates fixing with the cutting table, improving the stability and processing efficiency of the device.

[0038] This invention also provides a wire cutting method for slotted nuts. Based on the aforementioned wire cutting grooving device, a multi-station mandrel is inserted and fixed into a polygonal rotating body. Multiple slotted nuts to be processed are then installed on the mandrel's stations. The polygonal rotating body is placed on a base, and wire cutting is performed sequentially on the nuts at each station. After completing a angular cut, the polygonal rotating body is flipped while maintaining the wire cutting direction, and the cutting of nuts at each station continues until all angular cuts are completed. This method not only improves processing efficiency by allowing multiple nuts to be wire cut simultaneously, but also easily enables processing at different angular directions by flipping the polygonal rotating body, greatly enhancing processing flexibility and adaptability. This meets the wire cutting needs of different slotted nuts, improving overall processing quality and production efficiency.

[0039] Preferably, in this invention, the precise positioning of the multi-station mandrel is ensured by using alignment markers, thereby guaranteeing the processing quality. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of a wire EDM grooving device provided in an embodiment of the present invention;

[0041] Figure 2 An exploded view of a wire EDM grooving device provided in an embodiment of the present invention;

[0042] Figure 3 A side view of a wire EDM grooving device provided in an embodiment of the present invention;

[0043] Figure 4 This is a schematic diagram of the structure of a multi-station mandrel for a wire EDM grooving device provided in an embodiment of the present invention;

[0044] Figure 5 A front view of a multi-station mandrel for a wire EDM grooving device provided in an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the structure of a hexagonal groove nut for a wire EDM grooving device provided in an embodiment of the present invention;

[0046] Figure 7 A cross-sectional view of a hexagonal groove nut for a wire EDM grooving device provided in an embodiment of the present invention;

[0047] Figure 8 This is a schematic diagram of the wire cutting trajectory of a grooving device for wire cutting provided in an embodiment of the present invention.

[0048] Figure label:

[0049] 1. Base; 2. Oriented three-way sleeve; 3. Multi-station mandrel; 4. Clamping screw; 5. Groove nut to be machined; 6. Hexagonal groove nut. Detailed Implementation

[0050] To make the technical problems solved by the present invention, the technical solutions, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of the present invention. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0053] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0054] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0055] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0056] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0057] Example 1

[0058] As mentioned in the background section, aerospace-grade slotted nuts typically have six evenly distributed slots on their end faces. These nuts are small in size, require high precision, come in many varieties, and are produced in large quantities, with each variety having an annual output of tens of thousands of pieces. Currently, the machining of these end face slots is mostly done on a piece-by-piece basis. Particularly for six-slot nuts, the formation of the slots in each part requires three clamping operations. This not only increases the complexity of the workers' operations but also significantly extends the time spent on ineffective operations such as clamping, positioning, and adjustment. These operations consume a significant amount of production time, resulting in a huge waste of time costs. Furthermore, frequent clamping increases the risk of part damage, affecting the overall quality consistency of the finished product and further exacerbating production delays. Therefore, existing machining methods are insufficient to meet the demands of modern aerospace manufacturing for efficient and high-quality production, becoming a key factor restricting production efficiency and cost control.

[0059] To address the aforementioned problems, this invention provides a grooving device for wire EDM. Using this device, multiple nuts can be processed at once during the grooving process, and the number of times the parts are clamped and the tooling is flipped is reduced, thus ensuring part quality and improving processing efficiency.

[0060] This embodiment provides a grooving device for wire cutting. The device includes a base 1, a polygonal flipping body, and a multi-station mandrel 3. The base 1 is used to fix the polygonal flipping body and is connected to the cutting table or the working bridge plate of the wire cutting equipment by bolts. The polygonal flipping body is used to realize wire cutting of the grooved nuts (5) to be processed in different angular directions by flipping. It is set on the base 1 and is positioned and matched with the base 1. The multi-station mandrel 3 is used to install multiple grooved nuts 5 to be processed. It is inserted into the central hole of the polygonal flipping body and has several stations arranged in an array on its end face. As the polygonal flipping body flips to any angular direction of the grooved nuts 5 to be processed, the multi-station mandrel 3 can be arranged into multiple rows of stations. Each row of stations includes at least two stations, so that each wire cutting trajectory passes through at least two stations of the grooved nuts 5 to be processed, thereby improving the processing efficiency.

[0061] In this embodiment, the polygonal flip body can be a directional triangular sleeve 2, but is not limited to the directional triangular sleeve 2. It can be a square sleeve, hexagonal sleeve or octagonal sleeve with regular and uniform shape, etc., and the principle is the same as the directional triangular sleeve 2.

[0062] In this embodiment, the station arrangement on the end face of the multi-station mandrel 3 can be a hexagonal matrix, that is, a station is arranged on each vertex of a hexagon and a station is arranged on the geometric center. Of course, the station arrangement on the end face of the multi-station mandrel 3 is not limited to the above arrangement. As long as each column of stations along the cutting line includes at least two stations, the arrangement requirement is met. In this way, with the cooperation of the polygonal flipping body, the wire cutting operation of the slotted nut in different angular directions can be realized.

[0063] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0064] like Figure 1 As shown, this embodiment provides a grooving device for wire EDM, including a base 1, a directional three-way sleeve 2, a multi-station mandrel 3, and a clamping screw 4.

[0065] Combination Figure 2 and Figure 3 As shown, the base 1 adopts a cuboid structure with T-shaped positioning bosses at both ends and two symmetrical small holes in the middle for the installation and fixing of the base 1. It is usually connected to the cutting table by bolts.

[0066] The directional triangular sleeve 2 adopts a triangular structure. There are three small planes parallel to the bottom surface at the three edges of the directional triangular sleeve 2. The three large surfaces of the directional triangular sleeve 2 are provided with cross grooves that cooperate with the base 1 for positioning. The three small planes are provided with three threaded holes that cooperate with the clamping screws 4 to fix the multi-station mandrel 3. It can effectively limit the multi-station mandrel 3 and prevent it from rotating.

[0067] like Figure 4and Figure 5 As shown, the multi-station mandrel 3 has a cylindrical structure. Each end face features a hexagonal matrix of hexagonal prism structures (i.e., protruding structures). These hexagonal prism structures mate with the inner hexagonal parts (the slotted nut 5 to be machined). The hexagonal matrix arrangement of the hexagonal prisms not only provides multiple clamping positions for the parts but also effectively reduces the number of clamping operations. Alignment marks are designed at both ends of the outer circle of the multi-station mandrel 3. In this embodiment, a platform is created on the outer circle, parallel to the two planes of the hexagonal prism structure, facilitating part alignment. This ensures that the upper plane of the platform and the hexagonal prism structure is parallel to the base 1, guaranteeing that the center position of the part remains unchanged when the directional triangular sleeve 2 is flipped. The hexagonal prisms are designed at both ends of the mandrel, facilitating group processing, reducing the number of mandrels, and further improving part processing efficiency.

[0068] Based on the above-mentioned grooving device for wire EDM, this embodiment also provides a wire EDM method for slotted nuts, including the following steps:

[0069] Step 1: Install the base 1 of the wire cutting grooving device onto the working bridge plate of the wire cutting equipment, and use screws to fix and tighten it through the two holes on the base plate 1.

[0070] Step 2: Install the multi-station mandrel 3 into the hole of the directional three-dimensional sleeve 2. The station end (large outer circle of the chuck) of the multi-station mandrel 3 is engaged with the inner hole of the directional three-dimensional sleeve 2. The platform on the outer circle of the chuck is parallel to the plane of the directional three-dimensional sleeve 2 and perpendicular to the wire cutting wire of the wire cutting equipment.

[0071] Step 3: Install the slotted nut 5 to be processed onto the hexagonal column of the multi-station mandrel 3. The inner hexagon of the slotted nut 5 to be processed fits with the outer hexagon of the hexagonal column, and the end face of the slotted nut 5 to be processed is in close contact with the bottom surface of the hexagonal column.

[0072] Step 4: Install the directional three-way sleeve 2 containing the grooved nut 5 to be processed into the directional T-shaped boss of the base plate 1. Use a dial indicator to level the platform of the multi-station mandrel 3 to ensure that the platform is parallel to the base 1. After leveling and adjustment, use the clamping screw 4 to fix the multi-station mandrel 3 and the directional three-way sleeve 2. Use a wire cutting wire to align the outer circle of the chuck of the multi-station mandrel 3, and then the grooved nut 5 to be processed can be processed.

[0073] Step 5: As Figure 8 As shown, when adding the slotted nut 5 to be processed, the wire cutting wire is processed from left to right. First, the two parts on the right side are processed, and then the middle row and the leftmost row are processed in sequence. The wire feeding trajectory is similar to a periodic matrix pulse pattern, with a total of three wire feeding and outputs.

[0074] Step Six: After machining a pair of slots, the directional triangular sleeve 2 needs to be flipped 120 degrees and fixed on the base plate 1 in its original clamping position. Machining the adjacent slots of the part completes the machining of the four slots. A second flip completes the machining of the six slots of the hexagonal nut. Figure 6 and Figure 7 As shown, note that the parts do not need to be loaded or unloaded during the flipping process.

[0075] In this embodiment, the two threaded holes in the middle of the base plate 1 are for installing screws or bolts to connect and fix the pressure plate to the machine tool. The T-shaped bosses at both ends of the pressure plate cooperate with the cross grooves of the directional three-sided sleeve 2 to fix the directional three-sided sleeve 2 and ensure that the center position of the part remains unchanged after the directional three-sided sleeve 2 is flipped. The design of the T-shaped bosses at both ends is for force balance and efficient processing.

[0076] In this embodiment, the hole of the directional triangular sleeve 2 is fitted with the outer circle of the multi-station mandrel 3 for mounting parts, the cross grooves on the three surfaces of the directional triangular sleeve 2 are fitted with the T-shaped bosses on the base plate, the three threaded holes are fitted with clamping screws 4, and the vertical distance from the centerline of the directional triangular sleeve 2 to the three large surfaces of the directional triangular sleeve 2 is equal, ensuring that the center position of the parts remains unchanged after the directional triangular sleeve 2 is flipped.

[0077] In this embodiment, the length of the multi-station mandrel 3 can be greater than the length of the directional triangular sleeve 2. Both ends are designed with hexagonal matrix distribution of mounting parts, and the distribution of hexagonal columns is hexagonal. The number of hexagonal columns (stations) is n6+1 (n represents a multiple of 6). The coaxiality between the middle hexagonal column and the outer circle of the multi-station mandrel is no more than 0.01mm. The dimensions of the hexagonal columns on both ends of the multi-station mandrel are designed to be different. When the consistency of the internal hexagonal machining dimensions of the parts is not good, the parts need to be grouped before machining. The appropriate hexagonal column at one end is selected to install the parts according to the grouping situation, which can also reduce the number of groups of the multi-station mandrel.

[0078] The wire EDM grooving device provided in this embodiment has a novel structure. The part clamping stations are arranged in a hexagonal matrix, and the application of a directional three-way sleeve structure eliminates the need to remove parts during part turning; simply flipping the directional three-way sleeve completes the angular adjustment of multiple parts. Existing grooving fixtures generally clamp single parts or, in some cases, multi-station fixtures, mostly using a linear multi-station clamping method. Each time a part is turned over after processing, several parts are mounted on the fixture, and each part needs to be re-clamped and its orientation adjusted during turning. This results in numerous part clamping operations, leading to low efficiency for mass production. Compared to existing grooving fixtures, this invention reduces part clamping time and the number of cutting operations, significantly improving processing efficiency. Figure 1As shown, the wire EDM grooving device provided in this embodiment can hold 7 parts at a time. These 7 parts only need to be clamped once, flipped twice, and cut 9 times to complete the end face grooving of all 7 parts. If processing a single part, 7 parts would require clamping 7 times, flipping 14 times, and cutting 21 times to complete the end face grooving. It can be seen that this invention, calculated for 7 parts, reduces the flipping actions and time by 12 times, and the cutting time by 12 times, significantly reducing wasted time. Furthermore, the number of hexagonal prisms can be increased exponentially; the number of hexagonal prisms is n6+1 (n is a multiple of 6), meaning that the design concept of this embodiment can further increase processing efficiency exponentially.

[0079] Example 2

[0080] This embodiment also provides a specific implementation method for a grooving device for wire EDM, the specific steps of which are as follows:

[0081] Step 1: Use screws to connect and fix the base 1 to the wire cutting equipment through the two holes in the middle of the base 1.

[0082] Step 2: Insert the multi-station mandrel 3 into the large hole in the middle of the directional triangular sleeve 2. The large hole in the middle of the directional triangular sleeve 2 and the outer circle of the multi-station mandrel 3 are in clearance fit, with a clearance of less than 0.01mm. The platform of the multi-station mandrel 3 must be exposed outside the directional triangular sleeve 2 for easy alignment.

[0083] Step 3: Install the directional triangular sleeve 2 with the multi-station mandrel 3 in the T-shaped boss of the base plate 1, use a dial indicator to level the platform of the multi-station mandrel 3, and ensure that the platform is parallel to the base 1. After adjustment, use the clamping screw 4 to connect and fix the multi-station mandrel 3 and the directional triangular sleeve 2.

[0084] Step 4: Install the parts. Install the parts on the seven hexagonal posts. The hexagonal posts fit the inner hexagonal surfaces of the parts, and the end faces of the parts are in close contact with the bottom surfaces of the hexagonal posts. This completes the clamping of the parts.

[0085] Step 5: After aligning the tool and the part, call the wire EDM program to process the part. Each part can be processed with two symmetrical grooves at a time. After the groove in one direction is processed, flip the directional three-way sleeve 2 to complete the groove processing in the other direction of the part. The part does not need to be flipped and installed multiple times. The directional three-way sleeve can be flipped twice to complete the processing of all grooves of each group of parts.

[0086] Step 6: After a set of parts is machined, remove the parts and install the next set of parts. The next set of parts can be machined directly without tool setting.

[0087] In summary, the present invention provides a grooving device and method for wire EDM, which has the following advantages compared with existing auxiliary tooling:

[0088] This invention addresses the problems of low machining efficiency, numerous tooling flips and part clamping operations, excessive worker downtime, and low production efficiency associated with slotted nut machining. It provides a highly efficient and rapid wire EDM grooving device. This device not only reduces machining time and clamping operations but also minimizes the number of flips during operation and the worker's workload, significantly increasing machining efficiency and providing technical support for a highly efficient multi-machine work model within the company. Furthermore, the invention's simple structure makes it easy to implement and has significant practical value, offering valuable insights for tooling design in wire EDM grooving of multi-groove shaft-type parts.

[0089] The above embodiments are merely one of the implementation methods for achieving the technical solution of the present invention. The scope of protection claimed by the present invention is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention.

Claims

1. A grooving device for wire EDM, characterized in that, Including the base (1); A polygonal flip body is set on the base (1) and can realize wire cutting of the grooved nut (5) to be processed at different angles by flipping the polygonal flip body; A multi-station mandrel (3) is inserted and fixed on the polygonal flipping body and is arranged parallel to the base (1); the end face of the multi-station mandrel (3) is provided with multiple stations arranged in an array; wherein, when the multi-station mandrel (3) is flipped to any angle of the groove nut (5) to be processed, multiple rows of stations are formed, and each row of stations includes at least two stations; the stations of the multi-station mandrel (3) are used to install the groove nut (5) to be processed. The base (1) is provided with a positioning boss; the polygonal flip body includes multiple positioning surfaces, and each positioning surface is provided with a positioning groove that cooperates with the positioning boss; The polygonal flipping body adopts a directional triangular sleeve (2); the directional triangular sleeve (2) has a hole for inserting the multi-station mandrel (3); the directional triangular sleeve (2) and the multi-station mandrel (3) are fixed by a threaded connection. The directional triangular sleeve (2) includes three positioning surfaces, which are arranged at 120° between adjacent positioning surfaces; each positioning surface has a cross groove; the base (1) is provided with a T-shaped boss; when the directional triangular sleeve (2) is flipped to any positioning surface as the bottom surface, the cross groove of the corresponding positioning surface and the T-shaped boss form a positioning fit. The stations on the end face of the multi-station mandrel (3) are arranged in a hexagonal matrix, wherein a station is arranged at each vertex of the hexagon and a station is arranged at the geometric center. The workstation adopts a convex column structure, the shape of which corresponds to the inner hole shape of the slotted nut (5) to be processed; when wire cutting is performed, the slotted nut (5) to be processed is sleeved and fixed on the convex column structure. The multi-station mandrel (3) is provided with an alignment mark on the end near the station, and the alignment mark is used for alignment during wire cutting operations; The base (1) has a polygonal flip body at each end and a multi-station mandrel (3) inserted in the polygonal flip body. The base (1) has a through hole in the middle for fixing to the cutting table.

2. A wire cutting method for a slotted nut, characterized in that, The wire EDM grooving device according to claim 1 includes: Insert the multi-station mandrel (3) into the polygonal flip body and fix it; Install multiple slotted nuts (5) to be processed on the station of the multi-station mandrel (3); Place the polygonal flip body on the base (1); The slotted nuts (5) to be processed in each workstation are wire cut in sequence to complete the wire cutting of one angle of the slotted nuts (5); The polygonal flip body is flipped while the wire cutting direction remains unchanged. Then, the wire cutting operation is performed on the slotted nuts (5) to be processed on each workstation in turn. Repeat the above polygonal flipping process and wire cutting operation until the wire cutting of each angle of the groove nut (5) to be processed is completed.

3. The wire cutting method for the slotted nut according to claim 2, characterized in that, Insert the multi-station mandrel (3) into the directional three-way sleeve (2) so that the alignment mark on the multi-station mandrel (3) is parallel to the base (1) and perpendicular to the wire cutting wire. After alignment, use the clamping screw (4) to fix the multi-station mandrel (3) and the directional three-way sleeve (2). Install the end faces of multiple slotted nuts (5) to be processed close to the bottom surface of the multi-station mandrel (3); The first pair of slots is processed by wire cutting operation on the slotted nuts (5) to be processed at each workstation in turn; Flip the directional three-sided sleeve (2) 120°, and then perform wire cutting operation on the slotted nuts (5) to be processed on each workstation in turn to realize the second pair of slot processing; Continue to rotate the directional three-sided sleeve (2) 120°, and continue to perform wire cutting operation on the slotted nuts (5) to be processed on each workstation in turn to realize the third pair of slot processing, and obtain multiple hexagonal slotted nuts (6).

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