CN111390312A - Constant tension control electric spark grinding device for wire electrode - Google Patents
Constant tension control electric spark grinding device for wire electrode Download PDFInfo
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- CN111390312A CN111390312A CN202010376469.0A CN202010376469A CN111390312A CN 111390312 A CN111390312 A CN 111390312A CN 202010376469 A CN202010376469 A CN 202010376469A CN 111390312 A CN111390312 A CN 111390312A
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- wire
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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
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
- B23H7/08—Wire electrodes
- B23H7/10—Supporting, winding or electrical connection of wire-electrode
- B23H7/105—Wire guides
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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
Abstract
The invention discloses a wire electrode constant tension control electric spark grinding device which comprises a base, wherein a wire releasing mechanism, a wire feeding mechanism and a wire collecting mechanism are arranged on the base; the wire releasing mechanism comprises a magnetic powder brake arranged on the base and a wire releasing wheel fixedly connected with a rotating shaft of the magnetic powder brake, and the magnetic powder brake is electrically connected with a controller; the wire feeding mechanism comprises a constant tension sensing mechanism, ceramic rods and a plurality of conveying rod mechanisms, the constant tension sensing mechanism comprises a support frame and a plurality of tension detection guide wheels rotatably arranged on the support frame, one of the tension detection guide wheels is connected with a tension sensor, a working liquid tank is also arranged on the base, two ceramic rods are arranged in the working liquid tank in parallel, the distance between the two ceramic rods can be adjusted, and the conveying rod mechanisms comprise support rods and wire guide wheels; the yarn collecting mechanism comprises a yarn collecting bracket, a yarn collecting motor, a driving wheel and a driven wheel. The invention can ensure that the tension of the electrode wire is constant in the electric spark grinding process.
Description
Technical Field
The invention relates to the technical field of micro special machining, in particular to a wire electrode constant tension control electric spark grinding machining device.
Background
At present, two methods are commonly used for manufacturing a fine tool electrode used in micro electric discharge machining, micro electrolytic machining, and micro ultrasonic machining: one is micro electrolytic machining, which is characterized in that the quality of the machined surface is good, but higher dimensional accuracy is not easy to obtain, and generally, only electrodes with circular sections can be prepared; the other is micro electro discharge machining, in which electrodes of different cross-sectional shapes are prepared by a WEDG method, and higher dimensional accuracy can be obtained.
Wire electric discharge machining (WEDG) is a method for manufacturing a micro tool electrode on line in micro electric discharge machining, and various micro and special-shaped tool electrodes are machined by continuously corroding and removing redundant parts of the tool electrode through point discharge between a copper electrode wire and the tool electrode.
The WEDG technique is very effective for improving the fineness and accuracy of a fine electrode. The technique was used by Zenzenlong Jiu, university of Tokyo, Japan, to form a fine axis having a diameter of 2.5 μm, and to form a fine hole having a diameter of 5 μm using the fine axis. And the processing can make the tool preparation and the micro-processing finished on the same machine tool, and the processing precision is easy to ensure because the tool does not need to be installed secondarily. Although this technique has been studied with a relatively large amount of effort, the following problems still remain: firstly, when the size of the manufactured tool electrode is small, the requirements on the tension of a wire electrode wire, the running speed and the stability of the wire electrode wire are high, and the wire electrode wire is difficult to realize; secondly, the tension of the wire electrode wire cannot be ensured to be constant, so that the surface quality of the tool electrode is poor.
Disclosure of Invention
The invention aims to provide a wire electrode constant tension control electric spark grinding device, which is used for solving the problems in the prior art and ensuring the constant tension of a wire electrode in the electric spark grinding process.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a wire electrode constant tension control electric spark grinding device which comprises a base, wherein a wire releasing mechanism, a wire feeding mechanism and a wire collecting mechanism are arranged on the base; the wire releasing mechanism comprises a magnetic powder brake arranged on the base and a wire releasing wheel fixedly connected with a rotating shaft of the magnetic powder brake, and the magnetic powder brake is electrically connected with a controller; the wire feeding mechanism comprises a constant tension sensing mechanism, ceramic rods and a plurality of conveying rod mechanisms, the constant tension sensing mechanism comprises a support frame arranged on the base and a plurality of tension detection guide wheels rotatably arranged on the support frame, one of the tension detection guide wheels is connected with a tension sensor, the base is also provided with a working liquid tank, two ceramic rods are arranged in the working liquid tank in parallel, the distance between the two ceramic rods can be adjusted, and each conveying rod mechanism comprises a support rod vertically arranged on the base and a wire guide wheel rotatably connected with the support rod; the wire collecting mechanism comprises a wire collecting support arranged on the base, a wire collecting motor fixedly arranged on the wire collecting support, a driving wheel fixedly connected with a rotating shaft of the wire collecting motor and a driven wheel rotatably arranged on a pressing block, one end of the pressing block is rotatably connected with the wire collecting support, and the other end of the pressing block is connected with the wire collecting support through a vertical pressing bolt; the wire winding motor and the tension sensor are respectively and electrically connected with a constant tension control system.
Preferably, four transmission rod mechanisms which are staggered in pairs are arranged between the filament discharging mechanism and the working liquid tank, and one transmission rod mechanism is respectively arranged between the working liquid tank and the constant tension sensing mechanism and between the constant tension sensing mechanism and the filament collecting mechanism.
Preferably, a plurality of slots for placing the ceramic rods are arranged in the working liquid tank in parallel.
Preferably, the working liquid tank, the support frame and the wire collecting support are respectively connected with the base through bolts.
Preferably, the base is mounted on a micro three-dimensional motion table of a micro electro-discharge machine, a micro electro-chemical machining machine or a micro ultrasonic machining machine.
Preferably, the godet wheel pass through the bearing with bracing piece normal running fit, the godet wheel with the tension detects the guide pulley and is ceramic V type godet wheel.
Preferably, the number of the tension detection guide wheels is three, the three tension detection guide wheels are distributed in a V shape, one tension detection guide wheel is positioned between the other two tension detection guide wheels, and the tension sensor is connected with the middle tension detection guide wheel.
Compared with the prior art, the invention has the following technical effects:
the wire electrode constant tension control electric spark grinding machining device can ensure that the tension of the wire electrode is constant in the electric spark grinding machining process. The constant tension control electric spark grinding device for the line electrode adopts the multi-ceramic V-shaped wire guide wheel to conduct the electrode wire, so that the processing is more stable; according to the constant tension control wire electrode electric spark grinding device, the ceramic rod is arranged in a working liquid tank for wire electrode grinding, and an electrode is wound on the ceramic rod for machining, so that the machining stability is ensured; controlling the wire releasing resistance through a magnetic powder brake, constantly detecting the tension of an electrode wire by a constant tension control mechanism, feeding the tension back to a constant tension control system, and comparing and adjusting the rotating speed of a wire receiving motor in a wire receiving mechanism to ensure constant tension processing of the wire electrode; the pressure regulating mechanism is a pressing block, so that the gap between the driven wheel and the driving wheel is reduced through extrusion, and the electrode wire is effectively prevented from being loosened and constant tension processing cannot be guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a wire electrode constant tension control electric spark grinding device according to the present invention;
FIG. 2 is a first structural schematic diagram of a wire retracting mechanism in the constant-tension control electric spark grinding processing device for the wire electrode of the invention;
FIG. 3 is a second structural schematic diagram of a wire retracting mechanism in the constant-tension control electric spark grinding processing device for the wire electrode of the invention;
wherein: 1-base, 2-sensing mechanism fastening bolt, 3-constant tension sensing mechanism, 4-working liquid groove, 5-ceramic rod, 6-godet wheel, 7-bearing, 8-supporting rod, 9-working liquid groove fastening bolt, 10-working liquid groove fastening nut, 11-magnetic powder brake, 12-paying-off wheel, 13-wire collecting motor, 14-wire collecting support, 15-first pressing block, 16-second pressing block, 17-pressing bolt, 18-pressing nut, 19-driven wheel and 20-driving wheel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide a wire electrode constant tension control electric spark grinding device, which is used for solving the problems in the prior art and ensuring the constant tension of a wire electrode in the electric spark grinding process.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 3: the constant tension control electric spark grinding device for the wire electrode comprises a base 1, wherein the base 1 is installed on a micro three-dimensional moving workbench of a micro electric spark machining machine tool, a micro electrochemical machining machine tool or a micro ultrasonic machining machine tool, and a wire releasing mechanism, a wire feeding mechanism and a wire collecting mechanism are arranged on the base 1.
The wire releasing mechanism comprises a magnetic powder brake 11 arranged on the base 1 and a wire releasing wheel 12 fixedly connected with a rotating shaft of the magnetic powder brake 11, the magnetic powder brake 11 is electrically connected with a controller, and the wire releasing wheel 12 and the magnetic powder brake 11 rotate synchronously; the electrode wire is wound on the pay-off wheel 12, and the controller of the magnetic powder brake 11 controls the braking torque, so that the unwinding of the electrode wire on the pay-off wheel 12 is controlled.
The wire collecting mechanism comprises a wire collecting support 14 arranged on the base 1, a wire collecting motor 13 fixedly arranged on the wire collecting support 14, a driving wheel 20 fixedly connected with a rotating shaft of the wire collecting motor 13 and a driven wheel 19 rotatably arranged on the pressing block, and the wire collecting support 14 is connected with the base 1 through a bolt. One end of the pressing block is rotatably connected with the wire collecting bracket 14, and the other end of the pressing block is connected with the wire collecting bracket 14 through a vertical compression bolt 17; in the embodiment, the pressing block comprises a first pressing block 15 and a second pressing block 16 which are meshed with each other, namely the pressing block is divided into two parts so as to be convenient for installing the driven wheel 19 in the middle; make down from driving wheel 19 down through adjusting clamp bolt 17 and gland nut 18, reduce and the action wheel 20 between the distance, realize the squeezing action to prevent that the wire electrode from skidding between receiving a driving wheel 20 and receiving a driven wheel 19, guarantee the tension of electrode line simultaneously, better reach and receive a silk effect.
The wire feeding mechanism comprises a constant tension sensing mechanism 3, a ceramic rod 5 and six transmission rod mechanisms. Constant tension sensing mechanism 3 is including setting up the support frame on base 1 and three rotation setting tension on the support frame and detecting the guide pulley, and the support frame passes through sensing mechanism fastening bolt 2 to be connected with base 1, and three tension detects the guide pulley and is the distribution of V font, and a tension detects the guide pulley and is located between two other tension detection guide pulleys, and middle tension detection guide pulley is connected with tension sensor, receives silk motor 13 and tension sensor and is connected with the constant tension control system electricity respectively. When the constant-force processing machine works, different tension is generated around the electrode wire of the yarn guide wheel 6, so that the tension detection guide wheel in the constant-tension sensor generates different forces, the tension at each moment is detected through the tension sensor, the tension is fed back to the control system to be compared with the expected tension, the rotating speed of the yarn receiving motor 13 in the yarn receiving mechanism is adjusted through the comparison of the constant-tension control system, and the constant-force processing is realized.
Still be provided with work cistern 4 on the base 1, work cistern 4 is connected with base 1 through work cistern fastening bolt 9 and work cistern fastening nut 10, and parallel arrangement has two ceramic rods 5 in the work cistern 4, and the interval between two ceramic rods 5 can be adjusted, and parallel arrangement has four slots that are used for placing ceramic rod 5 in work cistern 4 in this embodiment, through placing two ceramic rods 5 and realize the regulation of interval between two ceramic rods 5 in the slot of difference.
Four transmission rod mechanisms which are staggered in pairs are arranged between the filament discharging mechanism and the working liquid tank 4, and a transmission rod mechanism is respectively arranged between the working liquid tank 4 and the constant tension sensing mechanism 3 and between the constant tension sensing mechanism 3 and the filament collecting mechanism. Each of the delivery rod mechanisms includes a support rod 8 vertically disposed on the base 1 and a godet wheel 6 rotatably connected to the support rod 8 via a bearing 7, and in this embodiment, the godet wheel 6 and the tension detection guide wheel both use ceramic V-shaped godet wheels.
In the embodiment, the model of the tension sensor is JZH L-T1-10N, the model of the magnetic powder brake 11 is CD-HSY-50, a tension signal detected by the tension sensor is fed back to an upper computer through a data acquisition card, the upper computer compares a feedback tension value with a preset tension value and then adjusts the wire collecting motor 13 until the feedback tension value is the same as the preset tension value, so that constant tension control of the wire electrode is realized.
The wire electrode constant tension control electric spark grinding device of the embodiment is used as follows:
the wire electrode constant tension control electric spark grinding device of the embodiment is installed on a micro three-dimensional motion workbench of a micro electric spark machine tool, a micro electrochemical machine tool or a micro ultrasonic machine tool through a base 1. The godet wheel 6 between the filament discharging mechanism and the working liquid groove 4 is sequentially a first godet wheel, a second godet wheel, a third godet wheel and a fourth godet wheel, the godet wheel 6 between the working liquid groove 4 and the constant tension sensing mechanism 3 is a fifth godet wheel, and the godet wheel 6 between the constant tension sensing mechanism 3 and the filament collecting mechanism is a sixth godet wheel; electrode line winding is on actinobacillus wheel 12, the left side of first godet wheel is walked around to the one end of electrode silk, the right side through the second godet wheel, then the left side through the third godet wheel, the left side through the fourth godet wheel, then through 2 ceramic rod 5, then pass through the right side of fifth godet wheel, later 3 tension detection guide pulleys on the permanent tension control mechanism of process, pass through the right side of sixth godet wheel at last, pass action wheel 20 and receive the silk from driving wheel 19.
The whole operation process is as follows: the wire feeding mechanism provides wire electrodes for wire electrode electric spark grinding, the wire electrodes and the tool electrodes discharge while the wire electrodes and the tool electrodes continuously abandon the wire electrodes participating in discharge, and new wire electrodes enter a discharge area to discharge with the tool electrodes. When the wire electrode machining tool works, the constant tension control mechanism detects the tension condition of the electrode wire in real time and feeds the tension condition back to the constant tension control system, the constant tension control system compares the wire tension acquired in real time with an expected tension value, if the wire tension is deviated, the wire collecting motor 13 in the wire collecting mechanism is controlled to work, the tension on the electrode wire is kept constant, and then the constant tension machining tool electrode is machined, the machining quality of the wire electrode is guaranteed, and the requirements of speed and tension required by machining are met.
In the description of the present invention, it should be noted that the terms "center", "left", "right", "vertical", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. The utility model provides a permanent tension control electric spark abrasive machining device of line electrode which characterized in that: the wire feeding device comprises a base, wherein a wire releasing mechanism, a wire feeding mechanism and a wire collecting mechanism are arranged on the base; the wire releasing mechanism comprises a magnetic powder brake arranged on the base and a wire releasing wheel fixedly connected with a rotating shaft of the magnetic powder brake, and the magnetic powder brake is electrically connected with a controller; the wire feeding mechanism comprises a constant tension sensing mechanism, ceramic rods and a plurality of conveying rod mechanisms, the constant tension sensing mechanism comprises a support frame arranged on the base and a plurality of tension detection guide wheels rotatably arranged on the support frame, one of the tension detection guide wheels is connected with a tension sensor, the base is also provided with a working liquid tank, two ceramic rods are arranged in the working liquid tank in parallel, the distance between the two ceramic rods can be adjusted, and each conveying rod mechanism comprises a support rod vertically arranged on the base and a wire guide wheel rotatably connected with the support rod; the wire collecting mechanism comprises a wire collecting support arranged on the base, a wire collecting motor fixedly arranged on the wire collecting support, a driving wheel fixedly connected with a rotating shaft of the wire collecting motor and a driven wheel rotatably arranged on a pressing block, one end of the pressing block is rotatably connected with the wire collecting support, and the other end of the pressing block is connected with the wire collecting support through a vertical pressing bolt; the wire winding motor and the tension sensor are respectively and electrically connected with a constant tension control system.
2. The wire electrode constant tension control electric discharge grinding apparatus according to claim 1, characterized in that: four conveying rod mechanisms which are staggered in pairs are arranged between the filament discharging mechanism and the working liquid tank, and one conveying rod mechanism is respectively arranged between the working liquid tank and the constant tension sensing mechanism and between the constant tension sensing mechanism and the filament collecting mechanism.
3. The wire electrode constant tension control electric discharge grinding apparatus according to claim 1, characterized in that: and a plurality of slots for placing the ceramic rods are arranged in the working liquid tank in parallel.
4. The wire electrode constant tension control electric discharge grinding apparatus according to claim 1, characterized in that: the working liquid tank, the support frame and the wire collecting support are respectively connected with the base through bolts.
5. The wire electrode constant tension control electric discharge grinding apparatus according to claim 1, characterized in that: the base is arranged on a micro three-dimensional motion workbench of a micro electro-discharge machining machine tool, a micro electro-chemical machining machine tool or a micro ultrasonic machining machine tool.
6. The wire electrode constant tension control electric discharge grinding apparatus according to claim 1, characterized in that: the godet wheel passes through the bearing with bracing piece normal running fit, the godet wheel with the tension detects the guide pulley and is ceramic V type godet wheel.
7. The wire electrode constant tension control electric discharge grinding apparatus according to claim 1, characterized in that: the tension detection device comprises three tension detection guide wheels, wherein the three tension detection guide wheels are distributed in a V shape, one tension detection guide wheel is positioned between the other two tension detection guide wheels, and the tension sensor is connected with the middle tension detection guide wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376469.0A CN111390312A (en) | 2020-05-07 | 2020-05-07 | Constant tension control electric spark grinding device for wire electrode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376469.0A CN111390312A (en) | 2020-05-07 | 2020-05-07 | Constant tension control electric spark grinding device for wire electrode |
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| CN111390312A true CN111390312A (en) | 2020-07-10 |
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| CN202010376469.0A Pending CN111390312A (en) | 2020-05-07 | 2020-05-07 | Constant tension control electric spark grinding device for wire electrode |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111570949A (en) * | 2020-07-13 | 2020-08-25 | 南京工程学院 | Spark-erosion wire cutting wire moving module based on synchronous pulley |
| CN114289807A (en) * | 2022-01-19 | 2022-04-08 | 无锡职业技术学院 | Spiral groove guide wheel-based micro-wire electrode tension self-adaptive adjusting device and method |
| CN114515875A (en) * | 2020-11-18 | 2022-05-20 | 南京玻璃纤维研究设计院有限公司 | Online adjustable constant tension control device and method |
-
2020
- 2020-05-07 CN CN202010376469.0A patent/CN111390312A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111570949A (en) * | 2020-07-13 | 2020-08-25 | 南京工程学院 | Spark-erosion wire cutting wire moving module based on synchronous pulley |
| CN111570949B (en) * | 2020-07-13 | 2021-08-10 | 南京工程学院 | Spark-erosion wire cutting wire moving module based on synchronous pulley |
| CN114515875A (en) * | 2020-11-18 | 2022-05-20 | 南京玻璃纤维研究设计院有限公司 | Online adjustable constant tension control device and method |
| CN114289807A (en) * | 2022-01-19 | 2022-04-08 | 无锡职业技术学院 | Spiral groove guide wheel-based micro-wire electrode tension self-adaptive adjusting device and method |
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