Electric spark machining method utilizing three-dimensional design software

Abstract

The invention discloses an electric spark machining method utilizing three-dimensional design software, which is characterized by comprising the following steps of: manufacturing a 3D (three-dimensional) model in the three-dimensional design software; electric spark machining parameters matched with the 3D model of the finished mold are generated through three-dimensional design software, and a corresponding table is generated; a table generated by the three-dimensional design software is imported into a numerical control system of the electric discharge machine, and a corresponding electric discharge machining program is generated through processing of the numerical control system of the electric discharge machine; and the electric discharge machine performs electric discharge machining according to a preset program, and the electrode moves according to a preset electric discharge machining program. According to the scheme, three-dimensional design software is used for generating corresponding machining information according to the specific shape of a mold product, a file with the format capable of being recognized by a numerical control system of the electric discharge machine is output, the file contains the machining information, and the file containing the machining information is imported into the numerical control system of the electric discharge machine during machining. And a corresponding electric spark machining program is generated.

Description

Technical Field

[0001] The invention relates to the technical field of electric spark machining, in particular to an electric spark machining method utilizing three-dimensional design software. Background Art

[0002] In the mold manufacturing system, EDM plays an important role. Complex and irregular mold parts, especially key mold parts (mold forming parts), are mostly completed by EDM, such as large and complex automobile molds. Therefore, it is necessary to generate targeted EDM programs to match the electrode's motion trajectory with the complex mold surface.

[0003] A Chinese patent is disclosed in the prior art, and the authorization announcement number is CN109332833B, and the steps are: 1. Preparation stage: modify the electrode catheter; install the external flushing liquid catheter so that the inlet external flushing liquid can flow along the outer surface of the electrode catheter to the surface of the electrode tube; install the outlet external flushing liquid nozzle; clamp the ring member; adjust the position of the outlet external flushing liquid nozzle so that the spray direction is parallel to the central axis of the deep hole; compile a processing program, in which the hole making process is divided into a zeroing stage, a repair stage, an inlet stage, a processing stage and an outlet stage, and the processing parameters are set for each stage; start the flushing liquid; start the processing program; 2. Hole making stage: realize the zeroing of the processing coordinates through the zeroing stage; make the shape of the electrode tube end reach the required shape through the repair stage; make the shape of the electrode tube end coincide with the shape of the processing surface of the ring member through the inlet stage; complete the hole making of the main part of the deep hole through the processing stage; complete the deep hole outlet processing through the outlet stage. The electrode replacement procedure is set based on the principle of high efficiency and time saving.

[0004] However, the prior art focuses on using the program of the numerical control system of the EDM machine to perform EDM, pays attention to publicly describing the specific process of EDM, and does not deeply consider the generation process of the machining program. Summary of the invention

[0005] The purpose of the present invention is to provide an EDM machining method using 3D design software, which can generate corresponding machining information according to the specific mold product shape using the 3D design software and import it into the CNC system of the EDM machine to automatically generate a machining program.

[0006] The object of the present invention is achieved in this way: an electrospark machining method utilizing three-dimensional design software comprises the following steps:

[0007] Step 1: Create a 3D model of the finished mold in a 3D design software;

[0008] Step 2: according to the specific shape of the 3D model of the finished mold, use the 3D design software to generate the EDM parameters matching the specific shape of the 3D model of the finished mold, and generate a corresponding table, in which the EDM parameters are recorded;

[0009] Step 3: Generate an EDM program. Import the table generated by the 3D design software into the CNC system of the EDM machine, and generate the corresponding EDM program through processing by the CNC system of the EDM machine.

[0010] Step 4: The EDM machine performs EDM according to a preset program, and the electrode moves according to the preset EDM program to turn the blank into a finished mold.

[0011] Furthermore, the format of the table formed in step 2 is xls format.

[0012] Furthermore, in step 2, a number of processing points are decomposed according to the appearance of the 3D model of the finished mold, and the processing points at least include processing stations and processing requirements.

[0013] Furthermore, in step one, the 3D model of the finished mold is consistent with the size of the finished mold itself.

[0014] Furthermore, in step 2, after the corresponding table is generated, the motion simulation function module of the three-dimensional design software is used, or other motion simulation software is imported to perform motion simulation to simulate the actual EDM environment.

[0015] Furthermore, in step three, the table generated by the three-dimensional design software is imported into the numerical control system of the EDM machine through the factory internal system or the removable storage medium, and the numerical control system of the EDM machine has an operable display interface for quickly calling the table.

[0016] Furthermore, in step 4, during the electrospark machining, the electrode moves according to a preset electrospark machining program under the drive of a corresponding driving unit of the electrospark machine.

[0017] Furthermore, the three-dimensional design software is UG software.

[0018] The beneficial effects of the present invention are:

[0019] Utilize 3D design software to generate corresponding processing information according to the specific mold product shape, and output a file in a format that can be recognized by the CNC system of the EDM machine. The file contains the above processing information. During processing, the file containing the processing information is imported into the CNC system of the EDM machine to generate a corresponding EDM program, thereby controlling the processing movement process of the electrode;

[0020] It improves the efficiency of EDM, reduces the burden on front-line operators, and is suitable for large-scale processing occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a main step diagram of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1 As shown, an EDM machining method using 3D design software is proposed. The 3D design software involved in the method is UG, and other 3D design software may be selected. The method generally includes the following steps:

[0024] For the 3D model of the specific finished mold in the UG software, several processing points are decomposed according to the shape of the 3D model, that is, processing information such as processing stations and processing requirements. The shapes of different workpieces need to correspond to different and matching processing information. The UG software generates a table in xls format, which records in detail the processing parameters for specific workpieces.

[0025] Then, the xls format table generated by UG software is imported into the CNC system of the EDM machine. The corresponding EDM program is generated through the processing of the CNC system of the EDM machine. During EDM machining, the electrode moves according to the preset EDM program to finally complete the mold processing.

[0026] The above main steps are described in detail below.

[0027] 1. Make a 3D model of the workpiece in the 3D design software: Make a one-to-one model of the specific workpiece (mold) in the UG software, paying attention to the integrity of each graphic element.

[0028] 2. Use UG software to generate EDM parameters: Generally, the 3D model of a specific workpiece has a variety of shapes and structures, and different shapes and structures require different machining parameters;

[0029] Call the special processing program generation module in UG software, set the blank material, shape and other information (not limited to this), set the electrode size, shape, material, quantity and other information (not limited to this), you can number the electrodes and blanks, you can customize the library of electrodes of different shapes for easy calling, so that the electrode and the mold are highly matched;

[0030] In UG software, several processing points are decomposed according to the shape of the 3D model, namely, processing information such as processing station, processing requirements, gap between electrode and workpiece, position change trajectory of electrode, etc. (but not limited to this). Different shapes of workpieces need to correspond to different matching processing information, thereby generating a table in xls format, which records in detail the processing parameters for specific workpieces.

[0031] In order to better ensure the accuracy and reliability of processing, a processing simulation function module can be set in the UG software, or a special motion simulation software can be used to test the motion route of the electrode during processing on the motion simulation interface according to the table containing the processing information, so as to perform processing motion simulation; in the motion simulation interface, a coordinate system is established to control the relative position of the electrode and the blank during motion; the designer can observe the route and state of the electrode's movement on the workpiece surface, establish a perceptual understanding, and thus more conveniently adjust the processing parameters according to the processing experience, and can perform motion simulation again for virtual debugging, so that the processing efficiency and accuracy are guaranteed, and possible faults that may occur during the processing are eliminated;

[0032] The corresponding electrodes and molds are numbered in the table for coordinated management.

[0033] It is worth mentioning that if the new mold has more structural elements or is larger in size, resulting in a more complex electrode processing trajectory, motion simulation can be used to predict possible faults that may occur during the processing process, and a more appropriate process route can also be considered to allow process personnel to adjust the specific processing technology.

[0034] 3. Generate EDM program: Import the processing information data into the CNC system of one or more EDM machines through the factory's internal system or removable storage media (mobile hard disk). That is, import the xls format table generated by UG software into the CNC system of the EDM machine, and generate the corresponding EDM program through processing by the CNC system of the EDM machine.

[0035] 4. Perform EDM according to the preset program: Clamp the corresponding electrode and set the coordinate origin. During EDM, the electrode moves according to the preset EDM program under the drive of the corresponding drive unit of the EDM machine, so that the blank becomes a finished mold, and finally the mold processing is completed.

[0036] In the above steps, each drive unit of the EDM machine is controlled by the CNC system. According to the EDM machining program, each drive unit is driven to perform controllable movement, and finally the electrode is driven to move according to the program, so that the workpiece is transformed from a blank state to a final shape, that is, the workpiece is processed into a mold that meets the requirements and the finished product has the expected surface roughness. This machining process can be repeated many times.

[0037] The discharge condition setting of the electrode needs to include but is not limited to the following information:

[0038] Electrode number: electrodes with different numbers have different size, shape, complexity, type and other parameters;

[0039] Process tasks, workpiece materials, workpiece quantities, work order codes, electrode processes;

[0040] Discharge gap, material, quantity and other information of the electrode;

[0041] Processing information, roughness requirements, Z-axis and R-axis reserved values, workpiece status (blank and non-blank), processing trajectory type (closed and open), swing mode, etc.

[0042] In addition, the above-mentioned processing information can also be stored in a removable storage medium or a storage unit of the CNC system of the EDM machine (numbered for identification). If a completely identical mold needs to be processed later, the original processing program can be directly called in the CNC system of the EDM machine to speed up efficiency.

[0043] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in the present invention, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral molding, a mechanical connection, or an indirect connection through an intermediate connecting component, and the specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electrospark machining method using three-dimensional design software, characterized in that: The steps include: Step 1: Create a 3D model of the finished mold in a 3D design software; Step 2: according to the specific shape of the 3D model of the finished mold, use the 3D design software to generate the EDM parameters matching the specific shape of the 3D model of the finished mold, and generate a corresponding table, in which the EDM parameters are recorded; Step 3: Generate an EDM program. Import the table generated by the 3D design software into the CNC system of the EDM machine, and generate the corresponding EDM program through processing by the CNC system of the EDM machine. Step 4: The EDM machine performs EDM according to a preset program, and the electrode moves according to the preset EDM program to turn the blank into a finished mold.

2. The method of electrospark machining using three-dimensional design software according to claim 1, characterized in that: The format of the table formed in step 2 is xls format.

3. The method of electrospark machining using three-dimensional design software according to claim 2, characterized in that: In step 2, a number of processing points are decomposed according to the appearance of the 3D model of the finished mold, and the processing points at least include processing stations and processing requirements.

4. The method of electrospark machining using three-dimensional design software according to claim 1, characterized in that: In step one, the 3D model of the finished mold is consistent with the size of the finished mold itself.

5. The method of electrospark machining using three-dimensional design software according to claim 1, characterized in that: In step 2, after the corresponding table is generated, the motion simulation function module of the three-dimensional design software is used, or other motion simulation software is imported to perform motion simulation to simulate the actual EDM environment.

6. The method of electrospark machining using three-dimensional design software according to claim 2, characterized in that: In step three, the table generated by the three-dimensional design software is imported into the numerical control system of the EDM machine through the factory internal system or the removable storage medium. The numerical control system of the EDM machine has an operable display interface for quickly calling the table.

7. The method of electrospark machining using three-dimensional design software according to claim 1, characterized in that: In step 4, during the electrospark machining, the electrode moves according to a preset electrospark machining program under the drive of the corresponding driving unit of the electrospark machine.

8. An EDM machining method using three-dimensional design software according to any one of claims 1 to 7, characterized in that: The three-dimensional design software is UG software.

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