CN203459786U - Electric spark machining device for micro-scale turbine with uniform-section blade profile - Google Patents
Electric spark machining device for micro-scale turbine with uniform-section blade profile Download PDFInfo
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- CN203459786U CN203459786U CN201320521157.XU CN201320521157U CN203459786U CN 203459786 U CN203459786 U CN 203459786U CN 201320521157 U CN201320521157 U CN 201320521157U CN 203459786 U CN203459786 U CN 203459786U
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- positioning plate
- turbine
- electrode
- integrated positioning
- prism
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Abstract
The utility model discloses an electric spark machining device for a micro-scale turbine with a uniform-section blade profile, and belongs to the field of machining of micro-scale turbines. The electric spark machining device for the micro-scale turbine with the uniform-section blade profile comprises a clamping rod, an integrated positioning plate, an indexing prism and a standard base, wherein a turbine blade tip circular molded surface is turned on a workpiece under numerical control; the workpiece is positioned and clamped on the indexing prism, and is integrated with the indexing prism, so that a rigid body is formed; the indexing prism is arranged on the integrated positioning plate; the integrated positioning plate is arranged on the standard base, and is positioned and clamped after being rotated and adjusted by a certain angle; all blades and blade root circular molded surfaces are machined symmetrically by using electric spark. According to the electric spark machining device, the machining problems of the micro-scale turbine are effectively solved, and the machining accuracy and stability of the micro-scale turbine are improved.
Description
Technical field
The utility model relates to a kind of uiform section blade profile minute yardstick turbine electric discharge machining apparatus, and it belongs to minute yardstick turbine manufacture field.
Background technology
Minute yardstick turbine will be widely used in all trades and professions such as industry, agricultural, environmental protection, health care, be tiny engine, the critical component in the micro-power plants such as micropump.And the succeeding in developing of this miniature, portable power set, will be not only to MEMS industry, and produce tremendous influence to take the industry that modern microelectronics, information and biotechnology be pillar.
Minute yardstick turbine is generally the difficult-to-machine material of high rigidity, so can the matter of utmost importance of minute yardstick turbine processing be process, secondly how accurate, stable, processing efficiently turbo blade and other profiles with complex free curved surface is the key issue of minute yardstick turbine processing.
At present, the manufacture method that minute yardstick turbine is conventional mainly contains numerical control milling processing, Electrolyzed Processing and spark machined.
The combination that numerical control milling processing can be controlled function by High-speed Computer number control milling and powerful movement locus processes accurate profile and the smooth surface of general blade, and the higher material removing rate of acquisition.But because the blade of minute yardstick turbine is very thin and profile is complicated, the high rigidity of material and the restriction that is subject to tool sharpening accessibility, make the Milling Process of minute yardstick turbine become more difficult, and the making of fine milling cutter is also one of current difficult point, it is very complicated and difficult processing small milling cutter, will be by means of other processing method toward contact.
Electrolyzed Processing is to remove material based on Anodic solution principle, is not subject to the restriction of metal material hardness and intensity, and process velocity is fast, and tool cathode is lossless.But Electrolyzed Processing is difficult to the stable high accuracy that obtains.For complex-shaped, required precision high minute yardstick turbine again, adopt Electrolyzed Processing, its technique research and development difficulty is larger, and the cycle is longer.
Spark-erosion sinking processing is by spark discharge ablation material, the machinability of material and its mechanical property are irrelevant, be suitable for difficult processing cutting metal material, add man-hour because electrode does not contact with workpiece, therefore there is no macroscopical cutting force, the clamping force of clamping process can be very little, substantially can ignore and clamp distortion, the low rigidity minute yardstick of suitable processing part; For complicated minute yardstick part, particularly with the processing of curved-surface structure, can design corresponding shaping or nearly shaped electrode, use one group of electrical guiding rule, under the prerequisite that guarantees surface quality and machining accuracy, improve process velocity; The spark-erosion sinking processing technology R&D cycle is shorter, can fast responding market demand.
Electrical discharge machining process is one of first-selected technique of current minute yardstick turbine processing, but in using the process of this technique, manufacturing and designing of electrode and process unit, the selection of processing process, how effective spark machined parameter etc. is set all needs to carry out further research.
Summary of the invention
The utility model is for a processing difficult problem for minute yardstick turbine, a kind of uiform section blade profile minute yardstick turbine electric discharge machining apparatus is provided, for solving the low problem large with distortion of minute yardstick turbo blade machining accuracy, realized the high accuracy processing of equal cross section blade profile minute yardstick turbine.
The utility model adopts following technical scheme: a kind of uiform section blade profile minute yardstick turbine electric discharge machining apparatus, comprise supporting rod, integrated positioning plate, calibration prism and reference base, with screw and nut, described electrode is installed on supporting rod, after adjusting position, clamp, described supporting rod is connected on machine tool chief axis, workpiece is positioned on calibration prism, with lock-screw locking, make workpiece and calibration prism become a rigid body, described calibration prism location is clamped on integrated positioning plate, described integrated positioning plate is installed in reference base after angle is adjusted in rotation and is locked.
Described integrated positioning plate is the location-plate for machined electrode and workpiece, with the silk thread cutting of being careful, on described integrated positioning plate, process for locating the regular polygon hole of calibration prism and for the electrode blank positioning round orifice of keeper electrode blank, a side of described electrode blank positioning round orifice is provided with groove.
Described calibration prism is one and positions with regular polygon hole on integrated positioning plate the regular polygon prism coordinating, and the limit number of described regular polygon equals the blade quantity of a turbine, is also provided with the circular hole coordinating with described workpiece location on described calibration prism.
The rotation of described integrated positioning plate is adjusted angle and is referred to by adjustment and make the stretch forming direction of turbine blade to be processed be parallel to main movement shaft direction of feed, and in process, the movement locus of electrode is the rectilinear motion that is parallel to main movement shaft direction of feed.
The utlity model has following beneficial effect:
(1) design of jacking electrode can complete the processing in a blade and blade pelvic surface of sacrum and leaf back and part blade root circle region simultaneously, has eliminated the electrode bringing because of Different electrodes processing zones of different and has changed and turn error, and improved working (machining) efficiency;
(2) process symmetrically all blades on turbine, machining deformation is cancelled out each other, effectively reduced the whole machining deformation of turbine;
(3) integrated positioning plate by the process of electrode and workpiece in one, thereby guaranteed the machining accuracy of whole process, integrated positioning plate rotates to definite angle, carries out the processing of electrode and workpiece, reduced the difficulty that manufactures and designs of electrode, and the movement locus of electrode while having simplified processing work.
Accompanying drawing explanation
Fig. 1 is the Facad structure schematic diagram of a kind of uiform section blade profile of the utility model minute yardstick turbine electric discharge machining apparatus.
Fig. 2 is the structural representation of integrated positioning plate.
Fig. 3 is the side structure schematic diagram of a kind of uiform section blade profile of the utility model minute yardstick turbine electric discharge machining apparatus.
Fig. 4 is electrode obverse and reverse structural representation.
Fig. 5 is the structural representation that integrated positioning plate holder is held electrode blank.
Wherein:
1-reference base, 2-integrated positioning plate, 3-calibration prism, 4-lock-screw, 5-workpiece, 6-supporting rod, 7-screw, 8-electrode, 9-nut, 10-groove, 11-regular hexagon hole, 12-electrode blank positioning round orifice, 13-blade back is processed nearly forming face, 14-leaf basin is processed nearly forming face, and 15-wheel disc is processed nearly forming face, 16-electrode blank.
The specific embodiment
Please refer to shown in Fig. 1, a kind of uiform section blade profile minute yardstick turbine electric discharge machining apparatus, comprise supporting rod 6, integrated positioning plate 2, calibration prism 3 and reference base 1, with screw 7 and nut 9, electrode 8 is installed on supporting rod 6, clamps after adjusting position, then supporting rod 6 is connected on machine tool chief axis; Workpiece 5 is positioned on calibration prism 3, with lock-screw 4 lockings, makes the two become a rigid body, calibration prism 3 location are clamped on integrated positioning plate 2; Finally integrated positioning plate 2 is installed in reference base 1, after angle is adjusted in rotation, locks.
Please refer to shown in Fig. 1 and Fig. 2, integrated positioning plate 2, is the location-plate for machined electrode 8 and workpiece 5, by the silk thread cutting processing of being careful, goes out for locating the regular hexagon hole 11 of calibration prism 3 and for the electrode blank positioning round orifice 12 of keeper electrode blank.Wherein on integrated positioning plate 2 for the electrode blank positioning round orifice 12 of keeper electrode blank, in one side, have groove 10, avoid wire electrode in machined electrode blank process to be worked into integrated positioning plate 2 simultaneously.
Described calibration prism 3, be one and can position the regular polygon prism coordinating with regular polygon hole on integrated positioning plate, and the limit number of regular polygon equals the quantity of turbo blade, and on prism, process the circular hole (not indicating) coordinating for workpiece location.
Please refer to shown in Fig. 3, angle is adjusted in 2 rotations of integrated positioning plate, refer to by adjustment and make the stretch forming direction of turbine blade to be processed be parallel to main movement shaft direction of feed, in process, the movement locus of electrode is the rectilinear motion that is parallel to main movement shaft direction of feed.
Please refer to shown in Fig. 1 to Fig. 3, a kind of uiform section blade profile minute yardstick turbine electrical discharge machining process method, it comprises the steps:
The first step: the blade number of establishing processed turbine is n=6 in the cited embodiment of n(the utility model), prepare cylindric workpiece blank;
Second step: process turbine leaf tip circle with numerical control turning;
The 3rd step: manufacture and design electrode;
The 4th step: complete the electric spark roughing of first blade with the maximum electrical guiding rule that can allow, rotation (360/n) * A degree after the rigid body of workpiece and the formation of calibration prism being taken out after completing, A is that n/2 rounds, after being installed, location carries out electric spark roughing, the Working position that after completing, taking-up rotates to second blade carries out electric spark roughing, taking-up rotation (360/n) * A degree after completing, after being installed, location carries out electric spark roughing, so circulation is until complete the electric spark roughing of whole turbine, repetitive cycling, use the electrical guiding rule successively reducing to complete successively semifinishing and the fine finishining of turbine.
In aforementioned the 4th step, if during the blade number n=6 of institute's processing turbine, its concrete process is: with the maximum electrical guiding rule that can allow, complete the electric spark roughing of first blade, four leaf positions of Rotate 180 degree to the after the rigid body of workpiece and the formation of calibration prism being taken out after completing, after being installed, location carries out electric spark roughing, electric spark roughing is carried out in the position that after completing, taking-up rotates to second blade, five leaf positions of taking-up Rotate 180 degree to the after completing, after being installed, location carries out electric spark roughing, electric spark roughing is carried out in the position that after completing, taking-up rotates to the 3rd blade, six leaf positions of taking-up Rotate 180 degree to the after completing, after being installed, location carries out electric spark roughing, repetitive cycling, is used the electrical guiding rule successively reducing to complete successively the semifinishing of turbine electric spark and fine finishining.
Please refer to shown in Fig. 4, described electrode design comprises the steps: first to analyze that to obtain turbo blade be that a constant cross-section is along a fixed vector direction stretching gained, design jacking electrode completes the leaf basin of a blade and the processing in blade back and part blade root circle region simultaneously; Wherein the blade back of electrode is processed nearly forming face 13, nearly forming face 14 processed by leaf basin and the nearly forming face 15 of blade root circle processing refers to by blade back, common formation after leaf basin and the biasing of blade root disc, and offset or dish is spark machined primary clearance.
Wherein part blade root circle region, refers to that the blade root circle region between adjacent two blades is jointly to form while processing respectively two adjacent blades by electrode, in order to process complete blade root circle region, is designed with certain overlapping machining area.
Please refer to shown in Fig. 4 to Fig. 5, described electrode manufacture comprises the following steps: prepare cylindric electrode blank 16, with numerical control turning, at blank center, process blade root circle processing nearly forming face (it is parts wherein that wheel disc is processed nearly forming face 15), the blank location processing is clamped in the electrode blank positioning round orifice 12 on integrated positioning plate 2, integrated positioning plate 2 angles are adjusted in rotation, with slow wire feeding processing leafing basin, process nearly forming face 14 and blade back is processed nearly forming face 13 and processes electrode peripheral shape.
Described electrode leaf basin is processed the silk thread cutting processing of being careful that nearly forming face 14 and blade back are processed nearly forming face 13, refer to and first at the non-machining area of electrode, with spark-erosion perforating machine, process aperture, take this aperture completes the processing of the closed circuit of two nearly forming faces as starting point and terminal again, and process is that closed circuit is in order to reduce because Stress Release causes electrode deformation.
Described electrode peripheral shape, the non-forming face of electrode simultaneously processing while referring to slow wire feeding machined electrode, is mainly used in the orientation assemble of electrode and supporting rod, and avoids interfering with adjacent blades in the process of processing one blade.
During described machined electrode, integrated positioning plate angle is adjusted in rotation, and carrying out afterwards with it turbine electrical spark working integrated positioning in man-hour plate, to adjust angle consistent.
The above is only preferred embodiment of the present utility model; should be understood that; for those skilled in the art, under the prerequisite that does not depart from the utility model principle, can also make some improvement, these improvement also should be considered as protection domain of the present utility model.
Claims (4)
1. a uiform section blade profile minute yardstick turbine electric discharge machining apparatus, comprise supporting rod (6), integrated positioning plate (2), calibration prism (3) and reference base (1), it is characterized in that: with screw (7) and nut (9), electrode (8) is installed on supporting rod (6), after adjusting position, clamp, described supporting rod (6) is connected on machine tool chief axis, workpiece (5) is positioned on calibration prism (3), with lock-screw (4) locking, make workpiece (5) and calibration prism (3) become a rigid body, described calibration prism (3) location is clamped on integrated positioning plate (2), described integrated positioning plate (2) is installed on after angle is adjusted in the upper rotation of reference base (1) and is locked.
2. a kind of uiform section blade profile minute yardstick turbine electric discharge machining apparatus as claimed in claim 1, it is characterized in that: described integrated positioning plate is the location-plate for machined electrode and workpiece, with the silk thread cutting of being careful, on described integrated positioning plate, process for locating the regular polygon hole of calibration prism and for the electrode blank positioning round orifice of keeper electrode blank, a side of described electrode blank positioning round orifice is provided with groove.
3. a kind of uiform section blade profile minute yardstick turbine electric discharge machining apparatus as claimed in claim 2, it is characterized in that: described calibration prism is one and positions with regular polygon hole on integrated positioning plate the regular polygon prism coordinating, the limit number of described regular polygon equals the blade quantity of a turbine, is also provided with the circular hole coordinating with described workpiece location on described calibration prism.
4. a kind of uiform section blade profile minute yardstick turbine electric discharge machining apparatus as claimed in claim 3, it is characterized in that: the rotation of described integrated positioning plate is adjusted angle and referred to by adjustment and make the stretch forming direction of turbine blade to be processed be parallel to main movement shaft direction of feed, and in process, the movement locus of electrode is the rectilinear motion that is parallel to main movement shaft direction of feed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320521157.XU CN203459786U (en) | 2013-08-26 | 2013-08-26 | Electric spark machining device for micro-scale turbine with uniform-section blade profile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320521157.XU CN203459786U (en) | 2013-08-26 | 2013-08-26 | Electric spark machining device for micro-scale turbine with uniform-section blade profile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203459786U true CN203459786U (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320521157.XU Withdrawn - After Issue CN203459786U (en) | 2013-08-26 | 2013-08-26 | Electric spark machining device for micro-scale turbine with uniform-section blade profile |
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| CN (1) | CN203459786U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464988A (en) * | 2013-08-26 | 2013-12-25 | 南京航空航天大学 | Uniform-section blade-type microscale turbine electric spark machining device and process method thereof |
-
2013
- 2013-08-26 CN CN201320521157.XU patent/CN203459786U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464988A (en) * | 2013-08-26 | 2013-12-25 | 南京航空航天大学 | Uniform-section blade-type microscale turbine electric spark machining device and process method thereof |
| CN103464988B (en) * | 2013-08-26 | 2016-08-10 | 南京航空航天大学 | A kind of uiform section blade profile minute yardstick turbine electric discharge machining apparatus and process thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140305 Effective date of abandoning: 20160810 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140305 Effective date of abandoning: 20160810 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |