CN219131025U - Workpiece micro small arbitrary arc discharge forming machining electrode and device - Google Patents
Workpiece micro small arbitrary arc discharge forming machining electrode and device Download PDFInfo
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- CN219131025U CN219131025U CN202223506851.2U CN202223506851U CN219131025U CN 219131025 U CN219131025 U CN 219131025U CN 202223506851 U CN202223506851 U CN 202223506851U CN 219131025 U CN219131025 U CN 219131025U
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/04—Electrodes specially adapted therefor or their manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model discloses a workpiece tiny arbitrary arc discharge forming machining electrode and a device, wherein the machining electrode comprises an electrode main body, a plurality of machining holes are formed in the electrode main body, the shape of each machining hole is matched with that of a workpiece, sharp angles are arranged at positions, corresponding to transition arcs of the workpiece, of the machining holes, and the vertexes of the sharp angles are positioned on the middles of the transition arcs. The electrode main body is provided with the sharp corners, and for fine and small transition arcs with any size of a workpiece, the corresponding transition arcs can be processed through the corresponding sharp corner design. The processing electrode can be applied to processing of micro small transition arcs at special positions of a die, solves the problems that the dimensional accuracy of the electrode is difficult to control, the dimensional consistency of the electrode is poor, and the like, reduces the flow of repairing back and forth in manufacturing, reduces the manufacturing difficulty of the whole die, improves the die accuracy, shortens the die processing period, and ensures that the quality of an injection molded product is higher.
Description
Technical Field
The utility model belongs to the technical field of precision machining, and particularly relates to a workpiece tiny arbitrary arc discharge forming machining electrode and a workpiece tiny arbitrary arc discharge forming machining device.
Background
In the processing of the connector, injection molding is generally adopted, the characteristic shape of the connector die is tiny, the processing is very time-consuming according to the traditional process method, the die precision can not be effectively ensured, the product subjected to injection molding has defects, the product is difficult to meet the requirement, and particularly, the processing of a fine small circular arc at a special position of the connector is difficult to control the dimensional precision of the circular arc of the die, so that the circular arc precision of the product is lower. In order to improve the machining precision of the die and the product, the die and the product can be subjected to forming machining by using electric sparks. In the electric spark forming, a pulse voltage is applied between an electrode and a workpiece while maintaining an appropriate gap therebetween, so that a gap spark discharge is generated, and a workpiece surface material is continuously melted and etched away to form a minute electric pit. The method is repeated, the workpiece material is continuously etched, and finally the shape of the electrode is copied on the workpiece, so that the purpose of forming and processing is achieved, and the electric spark forming and processing can be used for processing workpieces with various complex shapes in parallel, so that the method has wide application space.
The size of the electrode in electrical discharge machining is critical and directly affects the accuracy of the die and product. Chinese patent CN111185640a discloses a method for electric discharge forming of any angle chamfer for a mold part, wherein, firstly, a proper electrode is selected according to the size of the part, and the electrode is processed with sharp angle; calculating a discharge gap of the electrode according to the size of the chamfer required by the part; processing the shape and the size of the electrode according to the shape and the size of the part; setting a machine tool machining program, determining the actual angle degree of the part to be machined, inputting the actual angle degree into the machine tool program, and machining the part into a required chamfer shape through a machine tool; finally, optimizing parameters input into a machine tool program, and then guiding the optimized parameters into the machine tool program, wherein the dividing times are 3-5 times, so that the chamfer shape of the part is repeatedly processed for a plurality of times; the processing method is simple to operate, high in processing precision, and capable of reducing processing procedures through specific processing tracks, avoiding alternate and connection of multiple procedures, shortening processing period and reducing processing cost. The above patent works out the corresponding part by designing the electrode to match the shape and size of the part. In the case of a workpiece having a transition arc, if the electrode is also designed to have a structure having a corresponding transition arc, it is difficult to process a minute arbitrary arc of the workpiece.
Disclosure of Invention
The utility model aims to provide a workpiece tiny small arbitrary arc discharge forming machining electrode and a workpiece tiny arbitrary arc discharge forming machining device, which are used for solving the problems in the prior art.
In order to achieve the above object, on the one hand, the present utility model adopts the following technical scheme: the utility model provides a fine little arbitrary circular arc discharge forming machining electrode of work piece, includes the electrode main part, a plurality of processing holes have been seted up to the electrode main part, the shape of processing hole matches with the shape of work piece, and the position that the processing hole corresponds the work piece transition circular arc is equipped with the closed angle, the summit of closed angle is located on the perpendicular bisector of transition circular arc.
As an optional design structure of the above technical scheme, the processing hole comprises a central hole and a plurality of edge holes, the plurality of edge holes are annularly arranged around the central hole, each edge hole is communicated with the central hole, and the connection transition part of each edge hole and the central hole is provided with the sharp angle.
As an optional design structure of the above technical solution, the central hole is a round hole; the edge holes are rectangular holes.
As an alternative design structure of the technical scheme, two symmetrically arranged rectangular holes are arranged around the round hole.
As an alternative design structure of the technical scheme, the electrode main body is provided with a plurality of processing holes, and the processing holes are distributed in an array.
As an alternative design structure of the technical scheme, a discharge gap between the vertex of the sharp angle and the midpoint of the transition arc is S, S=R-D-E+C, R is the radius of the transition arc, C is an electric spark machining loss value, D is an electrode main body machining tolerance value, and E is an electric spark program shaking value.
As an alternative design structure of the technical scheme, the electrode main body is made of red copper.
On the other hand, the utility model adopts the following technical scheme: the workpiece tiny arbitrary arc discharge forming machining device comprises the workpiece tiny arbitrary arc discharge forming machining electrode and further comprises an electrode clamping mechanism, wherein the electrode clamping mechanism is used for fixing the electrode main body.
As an optional design structure of the technical scheme, the electrode clamping mechanism comprises an electrode clamping base, the bottom of the electrode clamping base is connected with the electrode main body, and an electrode locating plate is arranged at the top of the electrode clamping base.
As an optional design structure of the technical scheme, the electrode locating plate is a 3R locating plate, and the 3R locating plate is used for being connected with a 3R clamp of an electric discharge machine.
The beneficial effects of the utility model are as follows:
the electrode main body is provided with the sharp corners, and for fine and small transition arcs with any size of a workpiece, the corresponding transition arcs can be processed through the corresponding sharp corner design. The processing electrode can be applied to processing of micro small transition arcs at special positions of a die, solves the problems that the dimensional accuracy of the electrode is difficult to control, the dimensional consistency of the electrode is poor, and the like, reduces the flow of repairing back and forth in manufacturing, reduces the manufacturing difficulty of the whole die, improves the die accuracy, shortens the die processing period, and ensures that the quality of an injection molded product is higher.
Drawings
FIG. 1 is a schematic view of a construction of a processing electrode according to an embodiment of the present utility model;
FIG. 2 is a schematic view showing the structure of an electrode body according to an embodiment of the present utility model;
FIG. 3 is a schematic view of the structure of a workpiece in one embodiment of the utility model;
fig. 4 is a schematic view of a processing apparatus according to an embodiment of the present utility model.
In the figure: 1-an electrode body; 2-processing holes; 3-a workpiece; 4-transition arc; 5-sharp corners; 6-electrode clamping base; 7-electrode locating plate.
Detailed Description
Examples
As shown in fig. 1-3, the embodiment provides a workpiece tiny arbitrary arc discharge forming machining electrode, which is mainly used for an injection mold for machining a connector, so that the injection molded connector has a tiny transition arc 4 with higher precision, and can meet the actual requirements.
The machining electrode comprises an electrode main body 1, the electrode main body 1 is made of red copper, a plurality of machining holes 2 are formed in the electrode main body 1, the shapes of the machining holes 2 are matched with those of a workpiece 3, sharp corners 5 are arranged at positions, corresponding to transition circular arcs 4 of the workpiece 3, of the machining holes 2, and the top points of the sharp corners 5 are located on the midrange line of the transition circular arcs 4. The electrode main body 1 is designed with the sharp corners 5, fine and small transition arcs 4 of the workpiece 3 can be processed through the sharp corners 5, and corresponding transition arcs 4 can be processed through the corresponding sharp corners 5 for the transition arcs 4 with any size. The processing electrode can be applied to processing of a micro small transition arc 4 at a special position of a die, solves the problems that the dimensional accuracy of the electrode is difficult to control, the dimensional consistency of the electrode is poor, and the like, reduces the process of repairing back and forth in manufacturing, reduces the manufacturing difficulty of the whole die, improves the die accuracy, shortens the die processing period, and ensures that the outline dimension of an injection molded product is more perfect and the quality is higher.
In this embodiment, the machining hole 2 includes a central hole and a plurality of edge holes, the plurality of edge holes are annularly disposed around the central hole, each edge hole is communicated with the central hole, and the sharp angle 5 is disposed at a connection transition portion between each edge hole and the central hole. Specifically, the center hole is a round hole, the edge holes are rectangular holes, and two rectangular holes which are symmetrically arranged are arranged around the round hole.
Wherein, the discharge gap between the vertex of the sharp angle 5 and the midpoint of the transition arc 4 is S, s=r-D-e+c, R is the radius of the transition arc 4 of the workpiece 3, C is the electric spark machining loss value, D is the machining tolerance value of the electrode body 1, and E is the electric spark program shaking value. The electric spark machining loss value, the machining tolerance value of the electrode main body 1 and the electric spark program shaking value can be obtained according to electric spark machining parameters, the radius of the transition arc 4 of the workpiece 3 can be obtained according to a design drawing of the workpiece 3, and the electric discharge gap can be calculated according to the radius of the transition arc 4 of the workpiece 3, the electric spark machining loss value, the machining tolerance value of the electrode main body 1 and the electric spark program shaking value, and the size of the electrode main body 1 is designed based on the electric discharge gap, so that the radius of the transition arc 4 with higher precision is machined on the workpiece 3. For the workpiece 3 with the radius R of the transition arc 4 being 0.1mm, the discharge gap S between the top point of the sharp angle 5 of the electrode main body 1 and the midpoint of the transition arc 4 of the workpiece 3 is 0.04mm, and the size of the micro small transition arc 4 of the die meets the design requirement through actual electric spark machining, so that the size precision of the produced connector product also meets the production requirement.
In order to improve the production efficiency, the electrode main body 1 is provided with a plurality of processing holes 2, the plurality of processing holes 2 are distributed in an array, and a plurality of workpieces 3 can be processed at one time through the electrode main body 1, thereby being beneficial to reducing the production cost.
As shown in fig. 4, this embodiment further provides a workpiece micro-fine arbitrary arc discharge forming device, which includes the workpiece micro-fine arbitrary arc discharge forming electrode and further includes an electrode clamping mechanism, where the electrode clamping mechanism is used to fix the electrode main body 1, and the electrode clamping mechanism is installed on an electric discharge machine, and controls the movement of the electrode main body 1 by the electric discharge machine to implement electric discharge forming processing on the workpiece 3, where the electric discharge machine selects a summer mil electric discharge machine of 350MS model.
Specifically, the electrode clamping mechanism comprises an electrode clamping base 6, the bottom of the electrode clamping base 6 is connected with the electrode main body 1, and an electrode positioning sheet 7 is arranged at the top of the electrode clamping base 6. The electrode locating plate 7 is a 3R locating plate, and the 3R locating plate is used for being connected with a 3R clamp of an electric spark machine tool. The 3R clamp and the 3R locating piece belong to the existing products, and can improve the stability and the machining precision in the electric spark machining process.
The embodiment also provides a workpiece tiny arbitrary arc discharge forming processing method, which comprises the following steps:
and step A, designing a processing hole 2 with a corresponding shape on the electrode main body 1 according to the shape of the workpiece 3, and performing sharp angle processing on the electrode main body 1 corresponding to the position of the transition circular arc 4 of the workpiece 3, wherein the sharp angle vertex of the electrode main body 1 is positioned on the midpoint vertical line of the transition circular arc 4 of the workpiece 3.
Step B, designing a discharge gap S between the sharp corner vertex of the electrode main body 1 and the middle point of the transition arc 4 of the workpiece 3 according to the size of the transition arc 4 of the workpiece 3; the discharge gap S is calculated by the following steps: s=r-D-e+c, R is the radius of the transition arc 4 of the workpiece 3, C is the electric spark machining loss value, D is the machining tolerance value of the electrode body 1, and E is the electric spark program shaking value.
And C, machining the shape and size of the electrode body 1 according to the shape and size of the workpiece 3 so that the shape and size of the electrode body 1 is matched with the shape and size of the workpiece 3. Wherein, the processing of the shape and the size of the electrode main body 1 comprises: the electrode material is processed at a high speed, and then the electrode material after the high speed processing is processed by a slow wire feeding processing, so that the shape and the size of the obtained electrode main body 1 are processed in place. Preferably, the electrode material is red copper.
And D, setting a machining program of the electric spark machine tool, and enabling the electric spark machine tool to move according to a specified track and machine a transitional arc 4 of the workpiece 3. Wherein, the high-precision electric spark machine tool of summer Mier, mitsubishi or other brands is selected for processing. When the electric spark machine tool machining program is edited, a conical shaking mode or a cylindrical translation mode is selected, and the actual transition arc 4 is marked according to the drawing requirement to provide programming for use, so that the electric spark machine tool machining program runs according to a specified track to reach the required transition arc 4 size and shape of the workpiece 3. The electrode main body 1 is fixed on an electrode clamping mechanism, the electrode clamping mechanism is controlled by an electric spark machine tool, the electric spark machine tool is used for micro-machining of the workpiece 3, and the electric spark machine tool is a 350MS type summer Mier electric spark machine.
And E, optimizing the condition parameters input into the machining program of the electric spark machine tool, and then guiding the optimized parameters into the machining program of the electric spark machine tool, wherein the dividing times are 3-6 times, so that the transition arc 4 of the workpiece 3 is machined for a plurality of times, the accurate size of the transition arc 4 is ensured, and the contour is clear.
Because the size of the electrode is critical in electric spark machining, the precision of a die and a product is directly affected, the electrode is mainly machined by adopting the following method at present, the first method is to mill the electrode at a high speed by adopting CNC (computerized numerical control), and mill a circle of circular arc of a circular hole of the electrode by using a knife; the second method is to adopt CNC high-speed milling center to process the pre-perforation and bottom arc, and to process the main round hole by slow wire feeding, ensuring the concentricity of the two shapes to be within 0.005 mm; the third method is to adopt CNC high-speed milling center to process pre-perforating, slow wire-moving to process round holes and EDM to process arc, ensuring concentricity of the two shapes within 0.005 mm. The first method cannot be applied to the processing of micro fine arcs, so that the transition arc 4 of the workpiece 3 cannot be processed, and part of special workpieces 3 can only adopt a second method and a third method, wherein the second method and the third method have the following problems: 1. the concentricity of the two shapes is required to be ensured to be consistent, the operation difficulty is high, and the rejection rate of the electrode is high; 2. the machining period is longer due to multi-working-procedure alternation; 3. the rib position between the teeth after the inner arc of the electrode machining is smaller, the workpiece 3 is easy to wear, the bottom of the workpiece 3 is easy to be multiferroic, the shape and the size difference are larger, the problems that the electrode size precision is difficult to control, the electrode size consistency is poor and the like are caused, and the machining precision and quality of the workpiece 3 are affected.
Aiming at the problem, the utility model provides a workpiece tiny arbitrary arc discharge forming processing method, the electrode design and the electric spark machine tool processing program can save one third of the processing time of a die, the CNC high-speed milling processing efficiency is improved by three times, the transitional arc 4 of a circle of a round hole is not needed to be processed, and the cost of a small cutter can be saved; the relative position size of a transition arc 4 of the CNC high-speed milling is saved, the time for repeatedly trimming an electrode before an electric spark working procedure is reduced, the quality of a workpiece 3 is directly raised, all dimensional errors are within 0.005mm, and the processing period of the workpiece 3 is compared and advanced by one third; the problem of inaccurate repeated trimming in electrode machining for a long time is solved, and the machining difficulty of each procedure is effectively reduced; the processing efficiency of the whole project is improved, and the management and control of the project exchange period are effectively ensured.
Compared with the prior art, the utility model has the following advantages:
1. the workpiece 3 can be processed, the micro small arbitrary transition arc 4 is processed, the processing precision is high, and the size of the processed micro small transition arc 4 meets the design requirement;
2. the difficulty of each machining process of the workpiece 3 is reduced, the interpenetration, the delivery and the mutual control of multiple processes are avoided, the machining period is shortened, and the machining cost is reduced;
3. the arc characteristics on the electrode are reduced, the strength of the rib positions between the teeth is improved, the electrode loss is reduced when the workpiece 3 is processed, the problem of multiferroic bottom shape of the workpiece 3 is avoided, and the overall quality of the workpiece 3 is improved;
4. the processing method can be widely applied to processing other similar products, can greatly improve the processing efficiency of the products, saves the cost of CNC high-speed milling tools, reduces the processing cost of the products and improves the quality of the products.
In the description of the present utility model, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be fixedly connected, detachably connected, or integrally formed; may be a mechanical or electrical connection; may be directly connected or indirectly connected through an intermediate medium, and may be in communication with the inside of two elements or in interaction with the two elements, the specific meaning of the terms being understood by those skilled in the art. Furthermore, the particular features, structures, etc. described in the examples are included in at least one embodiment and those of skill in the art may combine features of different embodiments without contradiction. The scope of the present utility model is not limited to the above-described specific embodiments, and embodiments which can be suggested to those skilled in the art without inventive effort according to the basic technical concept of the present utility model are all within the scope of the present utility model.
Claims (10)
1. The utility model provides a fine little arbitrary circular arc discharge forming machining electrode of work piece, its characterized in that, includes electrode main part (1), a plurality of processing holes (2) have been seted up to electrode main part (1), the shape of processing holes (2) matches with the shape of work piece (3), and the position that processing holes (2) correspond work piece (3) transition circular arc (4) is equipped with closed angle (5), the summit of closed angle (5) is located on the perpendicular bisector of transition circular arc (4).
2. The workpiece tiny arbitrary arc discharge forming machining electrode according to claim 1, wherein the machining hole (2) comprises a central hole and a plurality of edge holes, the plurality of edge holes are annularly arranged around the central hole, each edge hole is communicated with the central hole, and a connecting transition part of each edge hole and the central hole is provided with the sharp corner (5).
3. The workpiece micro small arbitrary arc discharge forming machining electrode according to claim 2, characterized in that the center hole is a circular hole; the edge holes are rectangular holes.
4. A workpiece tiny arbitrary arc discharge forming machining electrode according to claim 3, wherein two symmetrically arranged rectangular holes are arranged around the round hole.
5. The workpiece tiny arbitrary arc discharge forming machining electrode according to claim 1, wherein the electrode main body (1) is provided with a plurality of machining holes (2), and the plurality of machining holes (2) are distributed in an array.
6. The workpiece tiny arbitrary arc discharge forming machining electrode according to claim 1, wherein a discharge gap between the vertex of the sharp corner (5) and the midpoint of the transition arc (4) is S, s=r-D-e+c, R is a radius of the transition arc (4), C is an electric spark machining loss value, D is a machining tolerance value of the electrode body (1), and E is an electric spark program shaking value.
7. The workpiece tiny arbitrary arc discharge forming machining electrode according to claim 1, characterized in that the material of the electrode body (1) is red copper.
8. The workpiece tiny arbitrary arc discharge forming machining device is characterized by comprising the workpiece tiny arbitrary arc discharge forming machining electrode according to any one of claims 1-7, and further comprising an electrode clamping mechanism, wherein the electrode clamping mechanism is used for fixing the electrode main body (1).
9. The workpiece tiny small arbitrary arc discharge forming processing device according to claim 8, wherein the electrode clamping mechanism comprises an electrode clamping base (6), the bottom of the electrode clamping base (6) is connected with the electrode main body (1), and an electrode positioning sheet (7) is arranged at the top of the electrode clamping base (6).
10. The workpiece tiny arbitrary arc discharge forming processing device according to claim 9, wherein the electrode positioning sheet (7) is a 3R positioning sheet, and the 3R positioning sheet is used for being connected with a 3R clamp of an electric discharge machine tool.
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| CN2022108223869 | 2022-07-13 | ||
| CN202210822386.9A CN114888374A (en) | 2022-07-13 | 2022-07-13 | Workpiece micro small arbitrary arc discharge forming machining electrode and machining method |
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| JPH04201019A (en) * | 1990-11-29 | 1992-07-22 | Mitsubishi Electric Corp | Method for electric discharge machining of profile |
| JP4498722B2 (en) * | 2003-11-19 | 2010-07-07 | 株式会社ソディック | Electric discharge machining method and electric discharge machining apparatus |
| CN102248234A (en) * | 2011-06-17 | 2011-11-23 | 上海电气电站设备有限公司 | Machining method of seal groove of guide ring |
| CN106077853B (en) * | 2016-07-14 | 2017-12-29 | 大连大学 | A kind of micro- 3 d part electric spark milling process method |
| CN106392212A (en) * | 2016-11-26 | 2017-02-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for electric machining of special-shaped groove |
| CN109202192B (en) * | 2018-10-31 | 2019-09-17 | 清华大学 | Fine electric spark servo scanning machined parameters preferred method and system |
| CN109604748A (en) * | 2019-01-22 | 2019-04-12 | 中国航空工业集团公司北京航空精密机械研究所 | A kind of electric discharge machining method of outer round surface array micro special-shaped slot |
| CN110756923B (en) * | 2019-09-27 | 2020-10-13 | 中国航发南方工业有限公司 | Method for improving kidney-shaped groove processing efficiency and application thereof |
| CN111185640B (en) * | 2020-01-14 | 2021-01-26 | 宝利根(成都)精密工业有限公司 | Discharge forming processing method for chamfer of any angle of die part |
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