Machining electrode and machining method for inner sharp corner of slotted hole of die steel part

Abstract

The invention discloses a machining electrode and a machining method for an inner sharp corner of a slotted hole of a die steel workpiece, and the machining electrode comprises a first electrode main body and a second electrode main body, the first group of machining tools comprises a rough machining sub-tool and a plurality of fine machining sub-tools, and the rough machining sub-tool and the plurality of fine machining sub-tools of the first group of machining tools are sequentially arranged on the first electrode main body; the rough machining sub-cutter and the plurality of fine machining sub-cutters of the first group of machining cutters are matched with slotted holes of a to-be-machined die steel part; when the machining electrode is used for machining, the rough machining sub-tool and the fine machining sub-tools of the first set of machining tools sequentially machine the inner sharp corners of the groove holes of the to-be-machined die steel parts through different machining parameters. The device can be used for high-precision machining of the slotted hole inner sharp corner of the die steel piece, the root radius of the slotted hole inner sharp corner of the die steel piece becomes smaller, the machining precision of the slotted hole inner sharp corner of the die steel piece is improved, and the die steel piece better meets the use requirement of a die.

Description

Technical Field

[0001] This application relates to the technical field of mold steel part processing. Specifically, it relates to a processing electrode and a processing method for the inner sharp corners in the slots of mold steel parts. Background Art

[0002] In mold steel parts, some mold steel parts need to process closed slots. Most of the slots in mold steel parts are square or quasi-square in shape (with local special-shaped parts); for such mold steel parts, the inner sharp corner positions usually design fillets with a radius of at least 0.2 mm or more according to the actual processing situation, because the current processing methods cannot achieve high-precision inner sharp corners.

[0003] The existing methods for processing the inner sharp corners in the slots of mold steel parts are as follows: First, mechanical processing, using a tool for milling. Due to the factor of the tool radius in milling, high-precision inner and outer sharp corners cannot be processed; Second, wire electrical discharge machining. This method can process the inner sharp corners in the slots of mold steel parts smaller than the mechanical processing method. However, this method uses copper wire for electro-corrosion processing, and the cutting tool is copper wire with a diameter of Ф0.25 mm or Ф0.2 mm. There is also a fillet with a radius of R0.125 mm or R0.1 mm of the copper wire remaining at the root of the inner sharp corner in the slot. However, even if there is only a fillet with a radius of R0.1 mm at the root of the inner sharp corner in the slot, it still cannot meet the requirements of the mold for high-precision small parts. This brings many difficulties to the high-precision processing of the inner sharp corners in the slots of mold steel parts, and it is difficult to process inner sharp corners with higher precision in the slots of mold steel parts. Summary of the Invention

[0004] The purpose of this application is to provide a processing electrode and a processing method for the inner sharp corners in the slots of mold steel parts. This processing electrode can be used for the high-precision processing of the inner sharp corners in the slots of mold steel parts, making the root radius of the inner sharp corners in the slots of mold steel parts smaller, improving the precision of processing the inner sharp corners in the slots of mold steel parts, and making the mold steel parts more in line with the usage requirements of the mold.

[0005] To achieve the above purpose, in the first aspect, this application provides a processing electrode for the inner sharp corners in the slots of mold steel parts, including: A first electrode body; A first set of processing tools, the first set of processing tools includes a roughing sub-tool and multiple finishing sub-tools. The roughing sub-tool and the multiple finishing sub-tools of the first set of processing tools are sequentially arranged on the first electrode body; the roughing sub-tool and the multiple finishing sub-tools of the first set of processing tools are adapted to the slots of the mold steel part to be processed; When the machining electrode is used to machine the inner sharp corners of the slots in the die steel workpiece to be machined, the rough machining sub-tools and multiple fine machining sub-tools of the first group of machining tools machine the inner sharp corners of the slots in the die steel workpiece to be machined successively with different machining parameters.

[0006] In the implementation process of the above technical solution, the machining electrode is used to machine the inner sharp corners of the slots in the die steel workpiece to be machined by means of electrical discharge machining. During machining, the die steel workpiece to be machined can first be cut with a copper wire by electrical discharge wire cutting to cut out a predetermined slot in the die steel workpiece to be machined, and then the machining electrode is used to machine the inner sharp corners of the slots in the die steel workpiece to be machined. During specific machining operations, the rough machining sub-tools and multiple fine machining sub-tools of the first group of machining tools can be used successively with different machining parameters to machine the inner sharp corners of the slots in the die steel workpiece to be machined. Since the rough machining sub-tools and multiple fine machining sub-tools of the first group of machining tools are adapted to the slots in the die steel workpiece to be machined, the rough machining sub-tools and multiple fine machining sub-tools of the first group of machining tools will have corresponding sharp corners, and the inner sharp corners of the slots in the die steel workpiece are machined through the corresponding sharp corners, so that the root radius of the inner sharp corners of the slots in the die steel workpiece can be made smaller, the precision of machining the inner sharp corners of the slots in the die steel workpiece can be improved, and the die steel workpiece can better meet the use requirements of the die.

[0007] In a preferred embodiment of the present application, the die steel workpiece to be machined has a plurality of regularly distributed slots; The machining electrode further includes a second group of machining tools. The second group of machining tools includes a rough machining sub-tool and multiple fine machining sub-tools. The rough machining sub-tool and multiple fine machining sub-tools of the second group of machining tools are successively arranged on the first electrode body; the rough machining sub-tool and multiple fine machining sub-tools of the second group of machining tools are adapted to the slots in the die steel workpiece to be machined; When the machining electrode is used to machine the inner sharp corners of the slots in the die steel workpiece to be machined, the rough machining sub-tool and multiple fine machining sub-tools of the second group of machining tools machine the inner sharp corners of the slots in the die steel workpiece to be machined successively with different machining parameters; When the machining electrode is used to machine the inner sharp corners of the slots in the die steel workpiece to be machined, the first group of machining tools is used to machine the inner sharp corners of the slots at odd positions of the die steel workpiece to be machined, and the second group of machining tools is used to machine the inner sharp corners of the slots at even positions of the die steel workpiece to be machined.

[0008] In the implementation process of the above technical solution, the second set of processing tools has the same characteristics as the first set of processing tools and adopts the same processing logic. Through the collaborative cooperation of the second set of processing tools and the first set of processing tools, it is convenient to process the inner sharp corners of the mold steel parts to be processed with dense and complex slots and holes. Moreover, by dividing the processing tool into two parts, it is convenient to produce the processing electrode and reduce the production cost.

[0009] In a preferred embodiment of the present application, the slots and holes of the mold steel parts to be processed have special-shaped parts, and the special-shaped parts have inner sharp corners. The processing electrode further includes a second electrode body and a third set of processing tools. The third set of processing tools includes a roughing sub-tool and a plurality of finishing sub-tools. The roughing sub-tool and the plurality of finishing sub-tools of the third set of processing tools are sequentially arranged on the second electrode body; the roughing sub-tool and the plurality of finishing sub-tools of the third set of processing tools are adapted to the special-shaped parts of the slots and holes of the mold steel parts to be processed. When the processing electrode is used to process the inner sharp corners of the slots and holes of the mold steel parts to be processed, the roughing sub-tool and the plurality of finishing sub-tools of the third set of processing tools process the inner sharp corners of the slots and holes of the mold steel parts to be processed in sequence with different processing parameters.

[0010] In the implementation process of the above technical solution, for the mold steel parts with special-shaped parts in the slots and holes of the mold steel parts to be processed, by using the third set of processing tools on the second electrode body to process the inner sharp corners of the special-shaped parts of the slots and holes of the mold steel parts to be processed, it is convenient to process the inner sharp corners of the slots and holes of such mold steel parts. Moreover, the third set of processing tools has the same characteristics as the first set of processing tools and adopts the same processing logic, which is convenient for the use and operation of the processing electrode. Through the collaborative cooperation of the third set of processing tools and the first set of processing tools, the processing tool can be divided into two parts. By using two processing tools to match the slots and holes of such mold steel parts, it is convenient to produce the processing electrode and reduce the production cost.

[0011] In a preferred embodiment of the present application, the mold steel parts to be processed have a plurality of regularly distributed slots and holes. The processing electrode further includes a fourth set of processing tools. The fourth set of processing tools includes a roughing sub-tool and a plurality of finishing sub-tools. The roughing sub-tool and the plurality of finishing sub-tools of the fourth set of processing tools are sequentially arranged on the second electrode body; the roughing sub-tool and the plurality of finishing sub-tools of the fourth set of processing tools are adapted to the special-shaped parts of the inner sharp corners of the slots and holes of the mold steel parts to be processed. When the processing electrode is used to process the inner sharp corners of the slots in the die steel part to be processed, the rough machining sub-tools and multiple fine machining sub-tools of the fourth group of processing tools process the inner sharp corners of the slots in the die steel part to be processed in sequence with different processing parameters; When the processing electrode is used to process the inner sharp corners of the slots in the die steel part to be processed, the third group of processing tools is used to process the inner sharp corners of the slots at odd positions of the die steel part to be processed, and the fourth group of processing tools is used to process the inner sharp corners of the slots at even positions of the die steel part to be processed.

[0012] In the implementation process of the above technical solution, the fourth group of processing tools has the same characteristics as the third group of processing tools and adopts the same processing logic. Through the coordinated cooperation of the fourth group of processing tools and the third group of processing tools, it is convenient to process the inner sharp corners of the die steel part to be processed with dense and complex slots. Moreover, by dividing the processing tools into two parts, it is convenient for the production and manufacture of the processing electrode and reduces the production and manufacture cost.

[0013] In a second aspect, the present application provides a method for processing the inner sharp corners of the slots in a die steel part, which applies the above-mentioned processing electrode for the inner sharp corners of the slots in a die steel part. The processing method includes: Pre-process the quenched die steel part; Use a copper wire to cut a predetermined slot in the pre-processed die steel part by wire electrical discharge machining; Use the processing electrode to process the inner sharp corners of the slots in the die steel part to be processed by electro-discharge forming machining, and sequentially use the rough machining sub-tool and multiple fine machining sub-tools of the first group of processing tools to process the inner sharp corners of the slots in the die steel part to be processed according to predetermined different processing parameters.

[0014] In the implementation process of the above technical solution, a copper wire is used to cut a predetermined slot in the die steel part to be processed by wire electrical discharge machining, and then the processing electrode is used to process the inner sharp corners of the slots in the die steel part to be processed. During specific processing operations, the rough machining sub-tool and multiple fine machining sub-tools of the first group of processing tools can be sequentially used to process the inner sharp corners of the slots in the die steel part to be processed with different processing parameters. Since the rough machining sub-tool and multiple fine machining sub-tools of the first group of processing tools are adapted to the slots in the die steel part to be processed, the rough machining sub-tool and multiple fine machining sub-tools of the first group of processing tools will have corresponding sharp corners, and the inner sharp corners of the slots in the die steel part are processed through the corresponding sharp corners, thereby making the root radius of the inner sharp corners of the slots in the die steel part smaller, improving the precision of processing the inner sharp corners of the slots in the die steel part, and making the die steel part more in line with the use requirements of the die.

[0015] In a preferred embodiment of the present application, the preprocessing of the quenched die steel part includes: Rough-machine the quenched die steel part to remove excess material, perform stress relief aging treatment on the quenched die steel part, and grind the quenched die steel part with a first predetermined margin left on each side to correct the shape of the quenched die steel part.

[0016] In the implementation process of the above technical solution, by preprocessing the quenched die steel part in this way, the outer surface of the quenched die steel part can have a high precision, which is beneficial to machining high-precision slot holes on the die steel part, and can also improve the precision of the inner sharp corners of the slot holes of the die steel part to be machined.

[0017] In a preferred embodiment of the present application, after grinding the quenched die steel part with a first predetermined margin left on each side to correct the shape of the quenched die steel part, the preprocessing of the quenched die steel part further includes: Use a copper wire with a first predetermined diameter to semi-precisely machine the shape of the quenched die steel part by wire electrical discharge machining with a second predetermined margin left on each side, perform stress relief aging treatment on the quenched die steel part, and precisely grind the shape of the quenched die steel part to correct the shape of the quenched die steel part within a predetermined geometric tolerance range.

[0018] In the implementation process of the above technical solution, using a copper wire to machine the shape of the quenched die steel part by wire electrical discharge machining and precisely grinding the shape of the quenched die steel part to correct the shape of the quenched die steel part within a predetermined geometric tolerance range can greatly improve the precision of the outer surface of the quenched die steel part.

[0019] In a preferred embodiment of the present application, the cutting of a predetermined slot hole on the preprocessed die steel part by using a copper wire through wire electrical discharge machining includes: Use a copper wire with a second predetermined diameter to cut a predetermined slot hole on the preprocessed die steel part by wire electrical discharge machining; Use a copper wire with a second predetermined diameter to correct the slot hole cut on the die steel part by wire electrical discharge machining multiple times, so that the surface roughness of the slot hole cut on the die steel part reaches a predetermined roughness, and the geometric tolerance of the slot hole cut on the die steel part is within a predetermined range.

[0020] In the implementation process of the above technical solution, a copper wire is used to cut a predetermined slot hole on a pre-processed die steel part by means of wire electrical discharge machining. By using the copper wire for correction multiple times, the surface roughness of the slot hole cut on the die steel part can be effectively made to reach the predetermined roughness, and the geometric tolerance of the slot hole cut on the die steel part can be within the predetermined range. In this way, the precision of the slot hole of the die steel part can be greatly improved, which is conducive to the high-precision machining of the inner sharp corner in the slot hole of the die steel part.

[0021] In a preferred embodiment of the present application, when using the processing electrode to perform electrical discharge machining on the inner sharp corner of the slot hole of the die steel part to be processed in accordance with different predetermined processing parameters, successively using the rough machining sub-tool and multiple fine machining sub-tools of the first set of processing tools, the inner sharp corner of the slot hole of the die steel part to be processed is processed in a left-right rocking manner.

[0022] In the implementation process of the above technical solution, processing the inner sharp corner of the slot hole of the die steel part to be processed in a left-right rocking manner can achieve the best corner cleaning effect when processing the inner sharp corner of the slot hole of the die steel part to be processed.

[0023] In a preferred embodiment of the present application, using the processing electrode to perform electrical discharge machining on the inner sharp corner of the slot hole of the die steel part to be processed in accordance with different predetermined processing parameters, successively using the rough machining sub-tool and multiple fine machining sub-tools of the first set of processing tools includes: Using the processing electrode to perform electrical discharge machining on the inner sharp corner of the slot hole of the die steel part to be processed in accordance with different predetermined spark patterns and different spark positions, successively using the rough machining sub-tool and multiple fine machining sub-tools of the first set of processing tools; The different spark patterns and different spark positions corresponding to the rough machining sub-tool and multiple fine machining sub-tools of the first set of processing tools gradually decrease according to the usage order of the sub-tools.

[0024] In the implementation process of the above technical solution, the different spark patterns and different spark positions corresponding to the rough machining sub-tool and multiple fine machining sub-tools of the first set of processing tools gradually decrease according to the usage order of the sub-tools, that is, the processing precision of the processing sub-tools gradually becomes more precise and refined. In this way, the corner cleaning effect on the inner sharp corner can be significantly improved, and the precision of the inner sharp corner of the slot hole of the processed die steel part is more ideal.

[0025] A processing electrode and a processing method for the inner sharp corner of a slot hole of a die steel part in the present application, compared with the prior art, have at least the following beneficial effects: A processing electrode for the inner sharp corner of a groove hole of a die steel part of the present application includes a first electrode body and a first set of processing tools. The first set of processing tools includes a rough machining sub-tool and a plurality of fine machining sub-tools. The rough machining sub-tool and the plurality of fine machining sub-tools of the first set of processing tools are sequentially arranged on the first electrode body; the rough machining sub-tool and the plurality of fine machining sub-tools of the first set of processing tools are adapted to the groove hole of the die steel part to be processed; this processing electrode is used to process the inner sharp corner of the groove hole of the die steel part to be processed by means of electrical discharge machining. During processing, the die steel part to be processed can first use a copper wire to cut a predetermined groove hole on the die steel part to be processed by means of electrical discharge wire cutting, and then use this processing electrode to process the inner sharp corner of the groove hole of the die steel part to be processed. During specific processing operations, the rough machining sub-tool and the plurality of fine machining sub-tools of the first set of processing tools can be used in sequence to process the inner sharp corner of the groove hole of the die steel part to be processed with different processing parameters. Because the rough machining sub-tool and the plurality of fine machining sub-tools of the first set of processing tools are adapted to the groove hole of the die steel part to be processed, the rough machining sub-tool and the plurality of fine machining sub-tools of the first set of processing tools will have corresponding sharp corners, and the inner sharp corner of the groove hole of the die steel part is processed through the corresponding sharp corners, so that the root radius of the inner sharp corner of the groove hole of the die steel part can be made smaller, improving the precision of the processing of the inner sharp corner of the groove hole of the die steel part, and making the die steel part more in line with the use requirements of the die.

[0026] A processing method for the inner sharp corner of a groove hole of a die steel part of the present application applies the above-mentioned processing electrode for the inner sharp corner of a groove hole of a die steel part, which can make the root radius of the inner sharp corner of the groove hole of the die steel part smaller, improve the precision of the processing of the inner sharp corner of the groove hole of the die steel part, and make the die steel part more in line with the use requirements of the die. Brief Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a three-dimensional structure schematic diagram of a die steel part provided by an embodiment of the present application; Figure 2 It is a front view structure schematic diagram of a die steel part provided by an embodiment of the present application; Figure 3 It is a three-dimensional structure schematic diagram of the first electrode body, the first set of processing tools and the second set of processing tools provided by an embodiment of the present application; Figure 4It is a front view structural schematic diagram of the first electrode body, the first set of processing tools, and the second set of processing tools provided by the embodiments of the present application; Figure 5 It is a schematic diagram of processing a die steel part using the first set of processing tools provided by the embodiments of the present application; Figure 6 It is Figure 5 a partial enlarged structural view of Figure 7 It is a schematic diagram of processing a die steel part using the second set of processing tools provided by the embodiments of the present application; Figure 8 It is Figure 7 a partial enlarged structural view of Figure 9 It is a three-dimensional structural schematic diagram of the second electrode body, the third set of processing tools, and the fourth set of processing tools provided by the embodiments of the present application; Figure 10 It is a front view structural schematic diagram of the second electrode body, the third set of processing tools, and the fourth set of processing tools provided by the embodiments of the present application.

[0029] Reference numerals: 11 - the first electrode body; 12 - the first set of processing tools; 13 - the second set of processing tools; 21 - the second electrode body; 22 - the third set of processing tools; 23 - the fourth set of processing tools. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents the selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0031] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated devices, elements, or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0032] Moreover, in addition to being used to represent orientation or positional relationships, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0033] In addition, the terms "installed", "set up", "provided with", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or a point connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, components, or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components, or parts. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] For die steel parts with a square or quasi-square slot hole shape (with local abnormal parts), at least a fillet with a radius of more than 0.2 mm is usually designed at the inner sharp corner position according to the actual processing situation, because the current processing method cannot achieve high-precision inner sharp corners. The inner sharp corner of the slot hole of the die steel part can be processed smaller by wire electrical discharge machining than by mechanical machining. However, in this method, copper wire electro-erosion machining is used, and the cutting tool is a copper wire with a diameter of Ф0.25 mm or Ф0.2 mm. There is also a fillet with a radius of R0.125 mm or R0.1 mm of the copper wire remaining at the root of the inner sharp corner of the slot hole. However, even if there is only a fillet with a radius of R0.1 mm at the root of the inner sharp corner of the slot hole, it still cannot meet the requirements of the die for high-precision small parts. This brings many difficulties to the high-precision machining of the inner sharp corner of the slot hole of the die steel part, and it is difficult to machine a more precise inner sharp corner in the slot hole of the die steel part.

[0036] In view of the above problems in the prior art, the embodiments of this application provide a machining electrode and a machining method for the inner sharp corner of the slot hole of a die steel part, which can be used for the high-precision machining of the inner sharp corner of the slot hole of the die steel part, making the root radius of the inner sharp corner of the slot hole of the die steel part smaller, improving the precision of machining the inner sharp corner of the slot hole of the die steel part, and making the die steel part more in line with the usage requirements of the die.

[0037] Embodiment 1 See Figures 1 to 8 , wherein, Figure 1 and Figure 2The given die steel part is an exemplary structure of a die steel part. Different die steel parts have their own structures and the shapes and quantities of the slots and holes. Figure 3 and Figure 4 The given machining electrode is applicable to Figure 1 and Figure 2 an exemplary machining electrode for the given die steel part, which is only an exemplary machining electrode structure and cannot fully represent the machining electrode for the inner sharp corners of the slots of a die steel part in this application.

[0038] A machining electrode for the inner sharp corners of the slots of a die steel part according to an embodiment of this application includes a first electrode body 11 and a first set of machining tools 12. The first set of machining tools 12 includes a rough machining sub-tool and multiple fine machining sub-tools. The rough machining sub-tool and the multiple fine machining sub-tools of the first set of machining tools 12 are sequentially arranged on the first electrode body 11; the rough machining sub-tool and the multiple fine machining sub-tools of the first set of machining tools 12 are adapted to the slots of the die steel part to be machined. When the machining electrode is used to machine the inner sharp corners of the slots of the die steel part to be machined, the rough machining sub-tool and the multiple fine machining sub-tools of the first set of machining tools 12 machine the inner sharp corners of the slots of the die steel part to be machined in sequence with different machining parameters.

[0039] In this embodiment, the slots of the die steel part are square or quasi-square in shape (there are local abnormal parts, such as Figure 1 and Figure 2 the locally protruding parts of the slots of the die steel part in, which can be understood as abnormal parts), so the slots of the die steel part have inner sharp corners. The inner sharp corners are the sharp corners in the slots of the die steel part. Understandably, most of the inner sharp corners of the slots of the die steel part are right angles, and they can also not be right angles; usually, the die steel part has multiple slots, and the multiple slots of the die steel part are distributed according to certain rules; in this embodiment, the slots of the die steel part are closed slots, that is, the surroundings of the slots of the die steel part are all enclosed.

[0040] In this embodiment, the machining electrode machines the inner sharp corners of the slots of the die steel part by means of electrical discharge machining; among them, in this embodiment, the first set of machining tools 12 includes a rough machining sub-tool and three fine machining sub-tools. As Figure 3 and Figure 4 shown, the first set of machining tools 12 is one row of machining tools, the first machining sub-tool in the corresponding row of machining tools is the rough machining sub-tool, and the second to fourth machining sub-tools in the corresponding row of machining tools are the three fine machining sub-tools. Understandably, the machining sub-tool does not mean there is only one machining sub-tool. In this embodiment, the machining sub-tool includes multiple machining sub-tool units, that is, as Figure 3 andFigure 4 Each of the shown machining tool posts is a machining sub-tool unit; it should be noted that in other embodiments, the fine machining sub-tools of the first set of machining tools 12 can be other numbers, such as two or four, etc. It can be understood that the rough machining sub-tools and multiple fine machining sub-tools of the first set of machining tools 12 are adapted to the slot holes of the mold steel part to be machined, not that the rough machining sub-tools and multiple fine machining sub-tools of the first set of machining tools 12 are completely matched with the slot holes of the mold steel part to be machined. The rough machining sub-tools and multiple fine machining sub-tools of the first set of machining tools 12 can be adapted to the slot holes of the mold steel part to be machined in terms of local structure or the structure of key positions.

[0041] It can be understood that when the machining electrode is used to machine the inner sharp corners of the slot holes of the mold steel part to be machined, the rough machining sub-tools and multiple fine machining sub-tools of the first set of machining tools 12 use different machining parameters to machine the inner sharp corners of the slot holes of the mold steel part to be machined in sequence. That is, first use the rough machining sub-tools of the first set of machining tools 12 to conduct primary machining on the inner sharp corners of the slot holes of the mold steel part to be machined, and then use the fine machining sub-tools of the first set of machining tools 12 one by one to conduct re-machining on the inner sharp corners of the slot holes of the mold steel part to be machined; during machining, the mold steel part to be machined does not need to move, and the machining sub-tools corresponding to the first set of machining tools 12 can be used to machine the inner sharp corners of the slot holes of the mold steel part to be machined one by one by moving the first electrode body 11; the machining parameters refer to the machining parameters related to electrical discharge machining, such as spark pattern, spark allowance, etc. It should be noted that different machining parameters do not mean that all the machining sub-tools correspond to different machining parameters, and they can be completely different or partially different.

[0042] A machining electrode for the inner sharp corner of a slot hole of a die steel part according to an embodiment of the present application is used to machine the inner sharp corner of the slot hole of the die steel part to be machined by means of electrical discharge machining. During machining, the die steel part to be machined can first be cut with a copper wire by electrical discharge wire cutting to cut a predetermined slot hole on the die steel part to be machined, and then the machining electrode is used to machine the inner sharp corner of the slot hole of the die steel part to be machined. During specific machining operations, the rough machining sub-tool and multiple fine machining sub-tools of the first set of machining tools 12 can be used in sequence to machine the inner sharp corner of the slot hole of the die steel part to be machined with different machining parameters. Since the rough machining sub-tool and multiple fine machining sub-tools of the first set of machining tools 12 are adapted to the slot hole of the die steel part to be machined, the rough machining sub-tool and multiple fine machining sub-tools of the first set of machining tools 12 will have corresponding sharp corners, and the inner sharp corner of the slot hole of the die steel part is machined through the corresponding sharp corners, so that the root radius of the inner sharp corner of the slot hole of the die steel part can be made smaller, improving the machining precision of the inner sharp corner of the slot hole of the die steel part and making the die steel part more in line with the use requirements of the die.

[0043] Embodiment 2 See Figures 1 to 8 , on the basis of the above Embodiment 1, the difference between this embodiment and Embodiment 1 is that a machining electrode for the inner sharp corner of a slot hole of a die steel part in this embodiment further includes a second set of machining tools 13. The second set of machining tools 13 includes a rough machining sub-tool and multiple fine machining sub-tools, and the rough machining sub-tool and multiple fine machining sub-tools of the second set of machining tools 13 are sequentially arranged on the first electrode body 11; the rough machining sub-tool and multiple fine machining sub-tools of the second set of machining tools 13 are adapted to the slot hole of the die steel part to be machined; When the machining electrode is used to machine the inner sharp corner of the slot hole of the die steel part to be machined, the rough machining sub-tool and multiple fine machining sub-tools of the second set of machining tools 13 are used to machine the inner sharp corner of the slot hole of the die steel part to be machined with different machining parameters in sequence; When the machining electrode is used to machine the inner sharp corner of the slot hole of the die steel part to be machined, the first set of machining tools 12 is used to machine the inner sharp corner of the slot holes at odd positions of the die steel part to be machined, and the second set of machining tools 13 is used to machine the inner sharp corner of the slot holes at even positions of the die steel part to be machined. For this, reference can be made to Figure 6 and Figure 8 .

[0044] In this embodiment, the second set of machining tools 13 includes a rough machining sub-tool and three fine machining sub-tools, as shown in Figure 3 and Figure 4As shown, the second set of processing tools 13 is arranged side by side with the first set of processing tools 12. The second set of processing tools 13 is the other row of processing tools. The second set of processing tools 13 has the same characteristics as the first set of processing tools 12 and adopts the same processing logic. In this embodiment, the second set of processing tools 13 will not be further described and explained. For the understanding of the second set of processing tools 13, reference can be made to the description and explanation of the first set of processing tools 12 in Embodiment 1, and details will not be repeated here.

[0045] In this embodiment, the odd-numbered slot holes of the mold steel part to be processed refer to the slot holes with odd slot hole sequences in each row of the slot holes of the mold steel part to be processed; the even-numbered slot holes of the mold steel part to be processed refer to the slot holes with even slot hole sequences in each row of the slot holes of the mold steel part to be processed.

[0046] During processing, the mold steel part to be processed does not need to be moved. First, the first electrode body 11 can be moved to enable the processing sub-tools corresponding to the first set of processing tools 12 to process the inner sharp corners of the odd-numbered slot holes of the mold steel part to be processed one by one. Then, the first electrode body 11 is rotated 180 degrees, and the first electrode body 11 is moved to enable the processing sub-tools corresponding to the second set of processing tools 13 to process the inner sharp corners of the even-numbered slot holes of the mold steel part to be processed one by one.

[0047] In the above structure, the second set of processing tools 13 has the same characteristics as the first set of processing tools 12 and adopts the same processing logic. Through the coordinated cooperation of the second set of processing tools 13 and the first set of processing tools 12, it is convenient to process the inner sharp corners of the mold steel part to be processed with dense and complex slot holes (such as Figure 1 and Figure 2 shown). Moreover, by dividing the processing tools into two parts, it is convenient for the production and manufacture of the processing electrode and reduces the production and manufacturing cost.

[0048] Embodiment 3 See Figures 1 to 10 , on the basis of the above Embodiment 1 or Embodiment 2, the difference between this embodiment and Embodiment 1 or Embodiment 2 is that for the processing electrode of the inner sharp corner of the slot hole of a mold steel part in this embodiment, the slot hole of the mold steel part to be processed has a special-shaped part, and the special-shaped part has an inner sharp corner; The processing electrode further includes a second electrode body 21 and a third set of processing tools 22. The third set of processing tools 22 includes a roughing sub-tool and a plurality of finishing sub-tools. The roughing sub-tool and the plurality of finishing sub-tools of the third set of processing tools 22 are arranged on the second electrode body 21 in sequence; the roughing sub-tool and the plurality of finishing sub-tools of the third set of processing tools 22 are adapted to the special-shaped part of the slot hole of the mold steel part to be processed; When the machining electrode is used to machine the inner sharp corner of the slot hole of the mold steel part to be machined, the rough machining sub-tool and multiple fine machining sub-tools of the third group of machining tools 22 successively machine the inner sharp corner of the slot hole of the mold steel part to be machined with different machining parameters.

[0049] In this embodiment, the third group of machining tools 22 includes a rough machining sub-tool and three fine machining sub-tools. As Figure 9 and Figure 10 shown, the third group of machining tools 22 is one row of the machining tools. The third group of machining tools 22 has the same characteristics as the first group of machining tools 12 and adopts the same machining logic. In this embodiment, the third group of machining tools 22 will not be further described and explained. For the understanding of the third group of machining tools 22, reference can be made to the description and explanation of the first group of machining tools 12 in Embodiment 1, which will not be elaborated here.

[0050] In this embodiment, through the combination of the third group of machining tools 22 and the first group of machining tools 12, the third group of machining tools 22 and the first group of machining tools 12 can be combined to match the shape of the slot hole of the mold steel part to be machined. Furthermore, the inner sharp corner of the slot hole of the mold steel part to be machined can be machined through the coordinated use of the third group of machining tools 22 and the first group of machining tools 12. Specifically, during machining, the first group of machining tools 12 can be used to machine the inner sharp corner corresponding to the slot hole of the mold steel part to be machined first, or the first group of machining tools 12 and the second group of machining tools 13 can be used to machine the inner sharp corner corresponding to the slot hole of the mold steel part to be machined first, and then the third group of machining tools 22 can be used to machine the inner sharp corner corresponding to the slot hole of the mold steel part to be machined.

[0051] In the above structure, for the mold steel part with a special-shaped part in the slot hole of the mold steel part to be machined, the third group of machining tools 22 on the second electrode body 21 is used to machine the inner sharp corner of the special-shaped part of the slot hole of the mold steel part to be machined, which can facilitate the machining of the inner sharp corner of the slot hole of such mold steel parts. And the third group of machining tools 22 has the same characteristics as the first group of machining tools 12 and adopts the same machining logic, which can facilitate the use and operation of the machining electrode. Through the coordinated cooperation of the third group of machining tools 22 and the first group of machining tools 12, the machining tools can be divided into two, and two machining tools can be used to match the slot hole of such mold steel parts, which can facilitate the production and manufacture of the machining electrode and reduce the production and manufacturing cost.

[0052] Embodiment 4 See Figures 1 to 10, based on the above-mentioned Embodiment 3, the difference between this embodiment and Embodiment 3 is that the machining electrode for the inner sharp corner of the slot hole of a die steel part in this embodiment further includes a fourth set of machining tools 23. The fourth set of machining tools 23 includes a rough machining sub-tool and multiple fine machining sub-tools. The rough machining sub-tool and multiple fine machining sub-tools of the fourth set of machining tools 23 are sequentially arranged on the second electrode body 21; the rough machining sub-tool and multiple fine machining sub-tools of the fourth set of machining tools 23 are adapted to the special-shaped parts of the inner sharp corners of the slot holes of the die steel part to be machined. When the machining electrode is used to machine the inner sharp corner of the slot hole of the die steel part to be machined, the rough machining sub-tool and multiple fine machining sub-tools of the fourth set of machining tools 23 machine the inner sharp corner of the slot hole of the die steel part to be machined in sequence with different machining parameters. When the machining electrode is used to machine the inner sharp corner of the slot hole of the die steel part to be machined, the third set of machining tools 22 is used to machine the inner sharp corners of the odd-numbered slot holes of the die steel part to be machined, and the fourth set of machining tools 23 is used to machine the inner sharp corners of the even-numbered slot holes of the die steel part to be machined.

[0053] In this embodiment, the fourth set of machining tools 23 includes a rough machining sub-tool and three fine machining sub-tools. As Figure 9 and Figure 10 shown, the fourth set of machining tools 23 is another row of machining tools among them. The fourth set of machining tools 23 has the same characteristics as the third set of machining tools 22 and adopts the same machining logic. In this embodiment, the fourth set of machining tools 23 will not be further described and explained. For the understanding of the fourth set of machining tools 23, reference can be made to the description and explanation part of the first set of machining tools 12 in Embodiment 1, which will not be elaborated here.

[0054] During machining, the die steel part to be machined does not need to be moved. First, the machining sub-tools corresponding to the third set of machining tools 22 can be used to machine the inner sharp corners of the odd-numbered slot holes of the die steel part to be machined by moving the second electrode body 21 one by one, and then the second electrode body 21 is rotated 180 degrees. The machining sub-tools corresponding to the fourth set of machining tools 23 are used to machine the inner sharp corners of the even-numbered slot holes of the die steel part to be machined by moving the second electrode body 21 one by one.

[0055] In the above structure, the fourth set of machining tools 23 has the same characteristics as the third set of machining tools 22 and adopts the same machining logic. Through the coordinated cooperation of the fourth set of machining tools 23 and the third set of machining tools 22, it is convenient to machine the inner sharp corners of the die steel part to be machined with dense and complex slot holes. Moreover, by dividing the machining tools into two parts, it is convenient for the production and manufacture of the machining electrode and reduces the production and manufacturing cost.

[0056] Embodiment 5 See Figures 1 to 10 , the embodiment of the present application provides a processing method for the inner sharp corner of the groove hole of a die steel part, and applies the processing electrode for the inner sharp corner of the groove hole of the die steel part in any one of the above-mentioned Embodiment 1 to Embodiment 4. The processing method includes: Pre-process the quenched die steel part; Use a copper wire to cut a predetermined groove hole on the pre-processed die steel part by wire electrical discharge machining; Use the processing electrode to process the inner sharp corner of the groove hole of the die steel part to be processed by electro-discharge forming machining, and sequentially use the rough machining sub-tool and multiple fine machining sub-tools of the first set of processing tools 12 according to predetermined different processing parameters.

[0057] A processing method for the inner sharp corner of the groove hole of a die steel part in the embodiment of the present application applies the above-mentioned processing electrode for the inner sharp corner of the groove hole of the die steel part, which can make the root radius of the inner sharp corner of the groove hole of the die steel part smaller, improve the precision of processing the inner sharp corner of the groove hole of the die steel part, and make the die steel part more meet the use requirements of the die.

[0058] As an optional implementation method, pre-processing the quenched die steel part includes: Rough machine the quenched die steel part to remove the surplus, perform stress relieving treatment on the quenched die steel part, and grind the quenched die steel part with a first predetermined margin on one side to correct the shape of the quenched die steel part.

[0059] In the above method, pre-processing the quenched die steel part in this way can make the outer surface of the quenched die steel part have a high precision, which is beneficial to machining a groove hole with a high precision on the die steel part, and can also improve the precision of the inner sharp corner of the groove hole of the die steel part to be processed.

[0060] Further, after grinding the quenched die steel part with a first predetermined margin on one side to correct the shape of the quenched die steel part, pre-processing the quenched die steel part further includes: Use a copper wire with a first predetermined diameter to semi-precisely machine the shape of the quenched die steel part with a second predetermined margin on one side by wire electrical discharge machining, perform stress relieving treatment on the quenched die steel part, and precisely grind the shape of the quenched die steel part to correct the shape of the quenched die steel part within the predetermined geometric tolerance range.

[0061] In the above method, machining the shape of the quenched die steel part by wire electrical discharge machining with a copper wire and precisely grinding the shape of the quenched die steel part to correct the shape of the quenched die steel part within the predetermined geometric tolerance range can greatly improve the precision of the outer surface of the quenched die steel part.

[0062] As an alternative embodiment, a predetermined slot is cut in the pre-machined die steel part by wire electrical discharge machining using a copper wire, including: A predetermined slot is cut in the pre-machined die steel part by wire electrical discharge machining using a copper wire with a second predetermined diameter; The slot cut in the die steel part is corrected multiple times by wire electrical discharge machining using a copper wire with a second predetermined diameter, so that the surface roughness of the slot cut in the die steel part reaches a predetermined roughness, and the geometric tolerance of the slot cut in the die steel part is within a predetermined range.

[0063] In the above method, a predetermined slot is cut in the pre-machined die steel part by wire electrical discharge machining using a copper wire, and by correcting multiple times using the copper wire, the surface roughness of the slot cut in the die steel part can effectively reach a predetermined roughness, and the geometric tolerance of the slot cut in the die steel part is within a predetermined range. In this way, the precision of the slot of the die steel part can be greatly improved, which is beneficial to the high-precision machining of the inner sharp corners of the slot of the die steel part.

[0064] As an alternative embodiment, when using a machining electrode for electro-discharge forming machining to machine the inner sharp corners of the slot of the die steel part to be machined in sequence with the rough machining sub-tool and multiple fine machining sub-tools of the first set of machining tools 12 according to predetermined different machining parameters, the inner sharp corners of the slot of the die steel part to be machined are machined in a way of shaking left and right.

[0065] In the above method, machining the inner sharp corners of the slot of the die steel part to be machined in a way of shaking left and right can achieve the best corner cleaning effect when machining the inner sharp corners of the slot of the die steel part to be machined.

[0066] As an alternative embodiment, using a machining electrode for electro-discharge forming machining to machine the inner sharp corners of the slot of the die steel part to be machined in sequence with the rough machining sub-tool and multiple fine machining sub-tools of the first set of machining tools 12 according to predetermined different machining parameters, including: Using a machining electrode for electro-discharge forming machining to machine the inner sharp corners of the slot of the die steel part to be machined in sequence with the rough machining sub-tool and multiple fine machining sub-tools of the first set of machining tools 12 according to predetermined different spark patterns and different spark positions; The different spark patterns and different spark positions corresponding to the rough machining sub-tool and multiple fine machining sub-tools of the first set of machining tools 12 gradually decrease according to the usage order of the sub-tools.

[0067] In the implementation process of the above technical solution, for the roughing sub-tools and multiple finishing sub-tools of the first set of processing tools 12, the corresponding different spark patterns and different spark positions gradually decrease according to the usage order of the sub-tools. That is, the machining precision of the machining sub-tools becomes more precise and refined step by step. In this way, the corner cleaning effect for the internal acute angles can be significantly improved, and the precision of the internal acute angles of the groove holes of the machined die steel parts is more ideal.

[0068] The following uses a specific example to exemplarily illustrate and explain the relevant content of the above-mentioned machining method for the internal acute angles of the groove holes of a die steel part in this embodiment.

[0069] When machining the internal acute angles of the groove holes of the die steel part shown in Figure 1 and Figure 2 the machining method for the internal acute angles of the groove holes of a die steel part in this embodiment can be carried out in the following steps in sequence: I. Rough machine the quenched die steel part to remove the surplus material, perform aging stress relief treatment on the quenched die steel part, and grind the quenched die steel part with a single-sided allowance of 0.1 mm to correct the shape of the quenched die steel part. II. Use a copper wire with a diameter of 0.2 mm to semi-precisely machine the shape of the quenched die steel part by wire electrical discharge machining with a single-sided allowance of 0.15 mm, perform aging stress relief treatment on the quenched die steel part, and precisely grind the shape of the quenched die steel part to correct the shape of the quenched die steel part within the predetermined geometric tolerance range. III. Use a copper wire with a diameter of 0.1 mm to cut out the predetermined groove holes on the pre-machined die steel part by wire electrical discharge machining. Use a copper wire with a diameter of 0.1 mm to perform six corrections on the groove holes cut out on the die steel part by wire electrical discharge machining, so that the surface roughness of the groove holes cut out on the die steel part reaches within Ra0.2μm, and the geometric tolerance of the groove holes cut out on the die steel part is controlled within the range of 0 / +0.002 mm. IV. Use a machining electrode to perform electrical discharge forming machining, and sequentially use the roughing sub-tools and multiple finishing sub-tools of the first set of processing tools 12 to machine the internal acute angles of the groove holes of the die steel part to be machined according to the predetermined different spark patterns and different spark positions. During machining, machine the internal acute angles of the groove holes of the die steel part to be machined in a left-right rocking manner. For the roughing sub-tools and multiple finishing sub-tools of the first set of machining tools 12, the corresponding different spark patterns and different spark levels gradually decrease according to the usage order of the sub-tools. Among them, the spark pattern corresponding to the roughing sub-tool of the first set of machining tools 12 is VDI-16, and the spark level is -0.06 mm; the spark patterns corresponding to the first and second finishing sub-tools of the first set of machining tools 12 are VDI-14, and the spark levels are -0.03 mm; the spark pattern corresponding to the third finishing sub-tool of the first set of machining tools 12 is VDI-12, and the spark level is -0.015 mm. By machining the inner sharp corners of the slots in the die steel parts in this way, the radius of the inner sharp corners of the slots in the die steel parts can be within R0.01 mm - R0.

[0070] For the use of the second set of machining tools 13, the third set of machining tools 22, and the fourth set of machining tools 23, reference can be made to the use of the first set of machining tools 12 described above, and details will not be elaborated here; regarding the usage order of the four sets of machining tools, it has been introduced in the foregoing embodiments, and reference can be made to the usage order of the four sets of machining tools in the foregoing embodiments.

[0071] In all the above embodiments, "big", "small" are relative, "many", "few" are relative, "up", "down" are relative. For the expression methods of such relative terms, the embodiments of this application will not elaborate further.

[0072] It should be understood that expressions such as "in one embodiment", "in this embodiment", "in the embodiments of this application", or "as an alternative implementation" mentioned throughout the specification mean that specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of this application. Therefore, the expressions "in one embodiment", "in this embodiment", "in the embodiments of this application", or "as an alternative implementation" that appear throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also know that the embodiments described in the specification are all alternative embodiments, and the actions and modules involved are not necessarily essential to this application.

[0073] In various embodiments of this application, it should be understood that the magnitude of the sequence numbers of the above processes does not necessarily mean the inevitable sequence of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of this application.

[0074] As described above, it is only the specific implementation manner of the present application. However, the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A machining electrode for the inner sharp corner of a slot hole in a die steel part, characterized in that, Comprising: A first electrode body (11); A first set of machining tools (12), the first set of machining tools (12) comprising a rough machining sub-tool and a plurality of finish machining sub-tools, the rough machining sub-tool and the plurality of finish machining sub-tools of the first set of machining tools (12) being sequentially arranged on the first electrode body (11); the rough machining sub-tool and the plurality of finish machining sub-tools of the first set of machining tools (12) being adapted to the slot holes of the die steel workpiece to be machined; When the machining electrode is used to machine the inner sharp corners of the slot holes of the die steel workpiece to be machined, the rough machining sub-tool and the plurality of finish machining sub-tools of the first set of machining tools (12) sequentially machine the inner sharp corners of the slot holes of the die steel workpiece to be machined by using different machining parameters.

2. The machining electrode for the inner sharp angle of the slot hole of the die steel part according to claim 1, characterized in that, The die steel workpiece to be machined has a plurality of regularly distributed slot holes; The machining electrode further comprises a second set of machining tools (13), the second set of machining tools (13) comprising a rough machining sub-tool and a plurality of finish machining sub-tools, the rough machining sub-tool and the plurality of finish machining sub-tools of the second set of machining tools (13) being sequentially arranged on the first electrode body (11); the rough machining sub-tool and the plurality of finish machining sub-tools of the second set of machining tools (13) being adapted to the slot holes of the die steel workpiece to be machined; When the machining electrode is used to machine the inner sharp corners of the slot holes of the die steel workpiece to be machined, the rough machining sub-tool and the plurality of finish machining sub-tools of the second set of machining tools (13) sequentially machine the inner sharp corners of the slot holes of the die steel workpiece to be machined by using different machining parameters; When the machining electrode is used to machine the inner sharp corners of the slot holes of the die steel workpiece to be machined, the first set of machining tools (12) is used to machine the inner sharp corners of the odd-numbered slot holes of the die steel workpiece to be machined, and the second set of machining tools (13) is used to machine the inner sharp corners of the even-numbered slot holes of the die steel workpiece to be machined.

3. The machining electrode for the inner sharp angle of the groove hole of the die steel part according to claim 1, characterized in that, The slot holes of the die steel workpiece to be machined have special-shaped parts, and the special-shaped parts have inner sharp corners; The machining electrode further comprises a second electrode body (21) and a third set of machining tools (22), the third set of machining tools (22) comprising a rough machining sub-tool and a plurality of finish machining sub-tools, the rough machining sub-tool and the plurality of finish machining sub-tools of the third set of machining tools (22) being sequentially arranged on the second electrode body (21); the rough machining sub-tool and the plurality of finish machining sub-tools of the third set of machining tools (22) being adapted to the special-shaped parts of the slot holes of the die steel workpiece to be machined; When the machining electrode is used to machine the inner sharp corners of the slot holes of the die steel workpiece to be machined, the rough machining sub-tool and the plurality of finish machining sub-tools of the third set of machining tools (22) sequentially machine the inner sharp corners of the slot holes of the die steel workpiece to be machined by using different machining parameters.

4. The machining electrode for the inner sharp corner of the slot hole of the die steel part according to claim 3, characterized in that, The die steel workpiece to be machined has a plurality of regularly distributed slot holes; The processing electrode further includes a fourth set of processing tools (23), the fourth set of processing tools (23) includes rough processing sub-tools and a plurality of fine processing sub-tools, and the rough processing sub-tools and the plurality of fine processing sub-tools of the fourth set of processing tools (23) are sequentially arranged on the second electrode body (21); the rough processing sub-tools and the plurality of fine processing sub-tools of the fourth set of processing tools (23) are adapted to the special-shaped parts of the inner sharp corners of the slot holes of the mold steel parts to be processed; When the processing electrode is used to process the inner sharp corners of the slot holes of the mold steel parts to be processed, the rough processing sub-tools and the plurality of fine processing sub-tools of the fourth set of processing tools (23) process the inner sharp corners of the slot holes of the mold steel parts to be processed in sequence with different processing parameters; When the processing electrode is used to process the inner sharp corners of the slot holes of the mold steel parts to be processed, the third set of processing tools (22) is used to process the inner sharp corners of the odd-numbered slot holes of the mold steel parts to be processed, and the fourth set of processing tools (23) is used to process the inner sharp corners of the even-numbered slot holes of the mold steel parts to be processed.

5. A processing method for the inner sharp angle in the slot hole of a die steel part, characterized in that, An electrode for processing the inner sharp corners of the slot holes of a mold steel part as described in any one of claims 1-4 is applied, and the processing method includes: Pre-processing the quenched mold steel part; Cutting a predetermined slot hole on the pre-processed mold steel part by wire electrical discharge machining using a copper wire; Using the processing electrode by electro-discharge machining, and sequentially using the rough processing sub-tools and the plurality of fine processing sub-tools of the first set of processing tools to process the inner sharp corners of the slot holes of the mold steel part to be processed according to predetermined different processing parameters.

6. The machining method for the inner sharp angle of the groove hole of the die steel part according to claim 5, characterized in that, The pre-processing of the quenched mold steel part includes: Rough machining the quenched mold steel part to remove the surplus, performing stress relief treatment on the quenched mold steel part by aging, and grinding the quenched mold steel part with a first predetermined margin left on one side to correct the shape of the quenched mold steel part.

7. The machining method of the inner sharp corner in the slot hole of the die steel part according to claim 6, characterized in that, After the shape of the quenched mold steel part is corrected by grinding the quenched mold steel part with a first predetermined margin left on one side, the pre-processing of the quenched mold steel part further includes: Using a copper wire with a first predetermined diameter by wire electrical discharge machining to semi-precisely machine the shape of the quenched mold steel part with a second predetermined margin left on one side, performing stress relief treatment on the quenched mold steel part by aging, and precisely grinding the shape of the quenched mold steel part to correct the shape of the quenched mold steel part within a predetermined geometric tolerance range.

8. The machining method for the inner sharp corner in the slot hole of the die steel part according to claim 5, characterized in that, The step of cutting a predetermined slot hole on the pre-processed mold steel part by wire electrical discharge machining using a copper wire includes: Cutting a predetermined slot hole on the pre-processed mold steel part by wire electrical discharge machining using a copper wire with a second predetermined diameter; Using a copper wire with a second predetermined diameter by wire electrical discharge machining to correct the slot hole cut on the mold steel part multiple times, so that the surface roughness of the slot hole cut on the mold steel part reaches a predetermined roughness, and the geometric tolerance of the slot hole cut on the mold steel part is within a predetermined range.

9. The machining method of the inner sharp corner in the slot hole of the die steel part according to claim 5, characterized in that, When machining the inner sharp corners of the slots in the die steel workpiece to be machined by using the rough machining sub-tool and multiple finish machining sub-tools of the first set of machining tools in sequence according to different predetermined machining parameters in the way of electrical discharge machining with the machining electrode, the inner sharp corners of the slots in the die steel workpiece to be machined are machined in a left-right rocking manner.

10. The processing method of the inner sharp angle of the groove hole of the die steel part according to claim 5 or 9, characterized in that, The machining of the inner sharp corners of the slots in the die steel workpiece to be machined by using the rough machining sub-tool and multiple finish machining sub-tools of the first set of machining tools in sequence according to different predetermined machining parameters in the way of electrical discharge machining with the machining electrode includes: Machining the inner sharp corners of the slots in the die steel workpiece to be machined by using the rough machining sub-tool and multiple finish machining sub-tools of the first set of machining tools in sequence according to different predetermined spark patterns and different spark positions in the way of electrical discharge machining with the machining electrode; The different spark patterns and different spark positions corresponding to the rough machining sub-tool and multiple finish machining sub-tools of the first set of machining tools gradually decrease according to the usage order of the sub-tools.

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