CN104526092A - Medical needle head electrochemical processing equipment and method - Google Patents
Medical needle head electrochemical processing equipment and method Download PDFInfo
- Publication number
- CN104526092A CN104526092A CN201410739526.1A CN201410739526A CN104526092A CN 104526092 A CN104526092 A CN 104526092A CN 201410739526 A CN201410739526 A CN 201410739526A CN 104526092 A CN104526092 A CN 104526092A
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- China
- Prior art keywords
- axis motion
- shaped electrode
- switch board
- electrolytic bath
- control system
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Classifications
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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
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
-
- 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
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
- B23H3/04—Electrodes specially adapted therefor or their manufacture
-
- 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
-
- 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
- B23H2400/00—Moving mechanisms for tool electrodes
Abstract
The invention discloses medical needle head electrochemical processing and a medical needle head electrochemical processing method. The equipment comprises a control cabinet, a pulse power supply, upper and lower slide plates, a guide stand column, an X-axis motion mechanism, a molding electrode, a clamp, a hydraulic switch, a multi-clamp supporting table, a water pump, a filter net, an electrolyte filter tank, an Y-axis motion mechanism, an X-axis motion mechanism, an equipment base, a workbench, an electrolyte slot, a needle head, a PLC (programmable logic controller) control system and a motion control system. The equipment disclosed by the invention can adopt an electrochemical molding and processing method to realize large-scale production of needle heads and improve processing efficiency; relatively high surface smoothness of a guide slot can be obtained without a follow-up processing process, the labor and production cost is lowered, the consumption of molybdenum wires in a cutting machine tool can be saved, and the energy consumption can be saved; a needle head guide slot and a needle head guide hole can realize step-by-step production on the same equipment, so that the process focus in the production process is guaranteed, and the processing precision is effectively improved.
Description
Technical field
The present invention relates to a kind of medical needle electrochemistry contour machining equipment and method, belong to the special Apparatus and method for for the fine gathering sill of medical needle and pod apertures processing.
Background technology
Processing for a kind of medical needle mainly contains two kinds, the first is that the syringe needle of 1.8mm to be processed wide 0.5mm, long 98mm and the degree of depth be the gathering sill of 0.25mm at diameter, and it two is on the syringe needle that diameter is 0.5mm, process the rectangular guiding hole that wide 0.22mm, long 0.8mm and the degree of depth are 0.25mm.At present, the processing of medical needle gathering sill primarily of in, quick-wire-moving linear cutting machine realizes, the production that wire cutting machine bed structure and processing technology determine syringe needle gathering sill has following features:
because wire cutting machine tool molybdenum filament uses limited length, the therefore limited amount of single process syringe needle, cause working (machining) efficiency low;
in process, because the vibration of molybdenum filament, the instability of medium discharge and moving back and forth of wire cause fine gathering sill surface smoothness poor, need subsequent handling process to ensure gathering sill surface smoothness, increase manpower and production cost;
due in being, fast wire winding lathe, process molybdenum filament and power consumption large, energy consumption is higher;
because pod apertures is not through hole, wire cutting machine tool cannot realize the processing of pod apertures, and cause syringe needle manufacturing procedure to be disperseed, repeatedly tool setting action affects machining accuracy.
The principle of electrochemistry processing and forming utilizes the galvano-cautery phenomenon during electricity of pulse feature between shaped electrode and workpiece to carry out the unnecessary metal of ablation, to reach predetermined accessory size, shape and Surface Machining requirement.Electrochemistry processing and forming can process little hole to tens microns and groove, and obtains high dimensional accuracy and great surface quality simultaneously.Therefore, adopt electrochemistry method for processing forming, can the batch production that multistation realizes syringe needle be set on equipment work top, improve working (machining) efficiency; Higher gathering sill surface smoothness be can namely obtain without the need to subsequent treatment operation, manpower and production cost reduced; The consumption of molybdenum filament in wire cutting machine tool can be saved, save energy consumption; The substep on the same device that can realize syringe needle gathering sill and pod apertures is produced, and ensures that operation is concentrated, improves machining accuracy.
Summary of the invention
In order to overcome existing wire cutting machine tool produce time exist working (machining) efficiency low, rooved face fineness is poor, use cost is high and operation concentrate etc. deficiency, the invention provides a kind of medical needle electrochemical machining equipment and method.
The object of the invention is to be achieved through the following technical solutions: a kind of medical needle electrochemical machining equipment, comprises switch board, the pulse power, upper lower skateboard, guide upright post, Z axis motion, shaped electrode, fixture, liquid-level switch, multiple clip brace table, water pump, screen pack, electrolyte filtering pond, Y-axis motion, X-axis motion, plant bottom case, workbench, electrolytic bath, syringe needle, PLC control system and kinetic control system.
Described kinetic control system and PLC control system to be placed in switch board and to be electrically connected with switch board; The pulse power is electrically connected with switch board, and the both positive and negative polarity of the pulse power is electrically connected with multiple clip brace table, shaped electrode respectively; Be fixed on bottom X-axis motion on plant bottom case, the top of X-axis motion is connected with the bottom of Y-axis motion and can slides along X-direction, and Y-axis motion top is connected with workbench and can slides along Y direction; X-axis motion, Y-axis motion and Z axis motion are all electrically connected with switch board by communication control line; Described workbench is provided with electrolytic bath, and described multiple clip brace table is placed in electrolytic bath inside, and is fixedly connected with workbench; Guide upright post is fixed on plant bottom case, and Z axis motion is fixed on guide upright post; Upper lower skateboard is connected on guide upright post, and can slide up and down along guide upright post; Described shaped electrode is fixed on lower skateboard; Described fixture can many rows be fixed on multiple clip brace table to multiple row as required, and fixture is fixed with syringe needle; Liquid-level switch is fixed on the inner and certain distance bottom distance electrolytic bath of electrolytic bath; Screen pack is provided with in electrolyte filtering pond; The water inlet of electrolytic bath connects electrolyte filtering pond by feed tube, and the delivery port of electrolytic bath connects electrolyte filtering pond by drain pipe, and feed tube is provided with water pump; Water pump, liquid-level switch are all electrically connected with switch board.
Further, described shaped electrode, for arrange structure, is processed while realizing being fixed on many syringe needles in single clamp more.
Further, described kinetic control system is DSP, and described DSP controls X-axis motion, Y-axis motion and Z axis motion fine positioning movements in conjunction with Interpolation.
Utilize the said equipment to carry out a method for medical needle electrical-chemistry method, comprise the following steps:
The first step: by be used for processing initial feed speed, again feed speed attenuation ratio, rollback distance, rollback speed, processing electric current, machining voltage, working depth, machining gap, withdrawing distance and withdrawing speed parameter input control cabinet;
Second step: the pulse power is opened, according to machining voltage and processing electric current parameter, export voltage and current corresponding with it, switch board is according to the state modulator Z axis motion motion of input simultaneously, thus drive upper lower skateboard to drive shaped electrode to move to needle surface, along with the reduction in gap between shaped electrode and syringe needle, electrochemical corrosion processing starts;
3rd step: when initial feed speed arranges too fast, causes corrosion rate to be less than shaped electrode feed speed, and gap between shaped electrode and syringe needle is constantly reduced, and meanwhile, the electric current of electrolysis constantly becomes large; When Faradaic current exceedes maximum current threshold values, for preventing short circuit phenomenon from occurring, the pulse power cuts out, simultaneously, Z axis motion operates, and in driving, lower skateboard drives shaped electrode to be moved upwards up to rollback distance with rollback speed, thus increases the gap between shaped electrode and syringe needle;
4th step: feed speed decays according to the parameter values of feed speed attenuation ratio again;
5th step: repeat second step to the 4th step, until be machined to the working depth of setting;
6th step: the pulse power cuts out, switch board controls the running of Z axis motion, and in driving, lower skateboard drives shaped electrode to move up to withdrawing distance with withdrawing speed.
The invention has the beneficial effects as follows: the invention provides a kind of special equipment processed for the fine gathering sill of medical needle and pod apertures, this equipment adopts electrochemistry method for processing forming, can realize the batch production of syringe needle, improves working (machining) efficiency; The higher surface smoothness of gathering sill can be obtained without the need to subsequent treatment operation, reduce manpower and production cost; The consumption of molybdenum filament in wire cutting machine tool can be saved, save energy consumption; The substep on the same device that can realize syringe needle gathering sill and pod apertures is produced, thus ensures that the operation of production process is concentrated, and effectively improves machining accuracy.
Accompanying drawing explanation
Fig. 1 is frame for movement schematic diagram of the present invention;
Fig. 2 is electric control theory figure of the present invention;
In figure: switch board 1, the pulse power 2, wire 3, upper lower skateboard 4, guide upright post 5, Z axis motion 6, shaped electrode 7, fixture 8, liquid-level switch 9, multiple clip brace table 10, feed tube 11, water pump 12, screen pack 13, electrolyte filtering pond 14, Y-axis motion 15, X-axis motion 16, plant bottom case 17, Control on Communication circuit 18, workbench 19, electrolytic bath 20, syringe needle 21, PLC control system 22, kinetic control system 23, drain pipe 24.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described further.
As shown in Figure 1, a kind of medical needle electrochemical machining equipment of the present invention, comprises switch board 1, the pulse power 2, upper lower skateboard 4, guide upright post 5, Z axis motion 6, shaped electrode 7, fixture 8, liquid-level switch 9, multiple clip brace table 10, water pump 12, screen pack 13, electrolyte filtering pond 14, Y-axis motion 15, X-axis motion 16, plant bottom case 17, workbench 19, electrolytic bath 20, syringe needle 21, PLC control system 22 and kinetic control system 23.
Described kinetic control system 23 and PLC control system 22 to be placed in switch board 1 and to be electrically connected with switch board 1; The pulse power 2 is electrically connected with switch board 1, and the both positive and negative polarity of the pulse power 2 is electrically connected with multiple clip brace table 10, shaped electrode 7 respectively; Be fixed on plant bottom case 17 bottom X-axis motion 16, the top of X-axis motion 16 is connected with the bottom of Y-axis motion 15 and can slides along X-direction, and Y-axis motion 15 top is connected with workbench 19 and can slides along Y direction; X-axis motion 16, Y-axis motion 15 and Z axis motion 6 are all electrically connected with switch board 1 by communication control line 18; Described workbench 19 is provided with electrolytic bath 20, and it is inner that described multiple clip brace table 10 is placed in electrolytic bath 20, and be fixedly connected with workbench 19; Guide upright post 5 is fixed on plant bottom case 17, and Z axis motion 6 is fixed on guide upright post 5; Upper lower skateboard 4 is connected on guide upright post 5, and can slide up and down along guide upright post 5; Described shaped electrode 7 is bolted on lower skateboard 4;
Described fixture 8 can many rows be fixed on multiple clip brace table 10 to multiple row as required, fixture 8 is fixed with syringe needle 21, can realizes the batch production of syringe needle, improve working (machining) efficiency; Liquid-level switch 9 is fixed on the inner and certain distance bottom distance electrolytic bath 20 of electrolytic bath 20; Screen pack 13 is provided with in electrolyte filtering pond 14; The water inlet of electrolytic bath 20 connects electrolyte filtering pond 14 by feed tube 11, and the delivery port of electrolytic bath 20 connects electrolyte filtering pond 14 by drain pipe 24, and feed tube 11 is provided with water pump 12; Water pump 12, liquid-level switch 9 are all electrically connected with switch board 1.
Described shaped electrode 7, for arrange structure, is processed while realizing being fixed on the many syringe needles 21 in single clamp 8 more.Described kinetic control system 23 is DSP, and described DSP controls X-axis motion 16, Y-axis motion 15 and Z axis motion 6 fine positioning movements in conjunction with Interpolation.
As shown in Figure 2, utilize the said equipment to carry out the method for medical needle electrical-chemistry method, comprise the following steps:
The first step: by be used for processing initial feed speed, again feed speed attenuation ratio, rollback distance, rollback speed, processing electric current, machining voltage, working depth, machining gap, withdrawing distance and withdrawing speed parameter input control cabinet 1, be stored in controller internal RAM fixed address space;
Second step: the pulse power 2 is opened, according to machining voltage and processing electric current parameter, export voltage and current corresponding with it, switch board 1 moves according to the state modulator Z axis motion 6 of input simultaneously, thus drive upper lower skateboard 4 to drive shaped electrode 7 to syringe needle 21 apparent motion, along with the reduction in gap between shaped electrode 7 and syringe needle 21, electrochemical corrosion processing starts;
3rd step: when initial feed speed arranges too fast, causes corrosion rate to be less than shaped electrode 7 feed speed, and gap between shaped electrode 7 and syringe needle 21 is constantly reduced, and meanwhile, the electric current of electrolysis constantly becomes large; When Faradaic current exceedes maximum current threshold values, for preventing short circuit phenomenon from occurring, the pulse power 2 cuts out, simultaneously, Z axis motion 6 operates, and in driving, lower skateboard 4 drives shaped electrode 7 to be moved upwards up to rollback distance with rollback speed, thus increases the gap between shaped electrode 7 and syringe needle 21;
4th step: feed speed decays according to the parameter values of feed speed attenuation ratio again;
5th step: repeat second step to the 4th step, until be machined to the working depth of setting;
6th step: the pulse power 2 cuts out, switch board 1 controls Z axis motion 6 and operates, and in driving, lower skateboard 4 drives shaped electrode 7 to move up to withdrawing distance with withdrawing speed.
Above-described embodiment is used for explaining and the present invention is described, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.
Claims (4)
1. a medical needle electrochemical machining equipment, it is characterized in that, comprise switch board (1), the pulse power (2), upper lower skateboard (4), guide upright post (5), Z axis motion (6), shaped electrode (7), fixture (8), liquid-level switch (9), multiple clip brace table (10), water pump (12), screen pack (13), electrolyte filtering pond (14), Y-axis motion (15), X-axis motion (16), plant bottom case (17), workbench (19), electrolytic bath (20), syringe needle (21), PLC control system (22) and kinetic control system (23),
Described kinetic control system (23) and PLC control system (22) to be placed in switch board (1) and to be electrically connected with switch board (1); The pulse power (2) is electrically connected with switch board (1), and the both positive and negative polarity of the pulse power (2) is electrically connected with multiple clip brace table (10), shaped electrode (7) respectively; X-axis motion (16) bottom is fixed on plant bottom case (17), the top of X-axis motion (16) is connected with the bottom of Y-axis motion (15) and can slides along X-direction, and Y-axis motion (15) top is connected with workbench (19) and can slides along Y direction; X-axis motion (16), Y-axis motion (15) and Z axis motion (6) are all electrically connected with switch board (1) by communication control line (18); Described workbench (19) is provided with electrolytic bath (20), and it is inner that described multiple clip brace table (10) is placed in electrolytic bath (20), and be fixedly connected with workbench (19); Guide upright post (5) is fixed on plant bottom case (17), and Z axis motion (6) is fixed on guide upright post (5); Upper lower skateboard (4) is connected on guide upright post (5), and can slide up and down along guide upright post (5); Described shaped electrode (7) is fixed on lower skateboard (4); Described fixture (8) can many rows be fixed on multiple clip brace table (10) to multiple row as required, fixture (8) is fixed with syringe needle (21); Liquid-level switch (9) is fixed on electrolytic bath (20) inside and distance electrolytic bath (20) bottom certain distance; Screen pack (13) is provided with in electrolyte filtering pond (14); The water inlet of electrolytic bath (20) connects electrolyte filtering pond (14) by feed tube (11), and the delivery port of electrolytic bath (20) connects electrolyte filtering pond (14) by drain pipe (24), and feed tube (11) is provided with water pump (12); Water pump (12), liquid-level switch (9) are all electrically connected with switch board (1).
2. a kind of medical needle electrochemical machining equipment according to claim 1, is characterized in that, described shaped electrode (7), for arrange structure, is processed while realizing being fixed on the many syringe needles (21) in single clamp (8) more.
3. a kind of medical needle electrochemical machining equipment according to claim 1, it is characterized in that, described kinetic control system (23) is DSP, and described DSP controls X-axis motion (16), Y-axis motion (15) and Z axis motion (6) fine positioning movements in conjunction with Interpolation.
4. utilize the said equipment to carry out a method for medical needle electrical-chemistry method, it is characterized in that, comprise the following steps:
The first step: by be used for processing initial feed speed, again feed speed attenuation ratio, rollback distance, rollback speed, processing electric current, machining voltage, working depth, machining gap, withdrawing distance and withdrawing speed parameter input control cabinet (1);
Second step: the pulse power (2) is opened, according to machining voltage and processing electric current parameter, export voltage and current corresponding with it, switch board (1) is according to state modulator Z axis motion (6) motion of input simultaneously, thus drive upper lower skateboard (4) to drive shaped electrode (7) to syringe needle (21) apparent motion, along with the reduction in gap between shaped electrode (7) and syringe needle (21), electrochemical corrosion processing starts;
3rd step: when initial feed speed arranges too fast, causes corrosion rate to be less than shaped electrode (7) feed speed, and gap between shaped electrode (7) and syringe needle (21) is constantly reduced, and meanwhile, the electric current of electrolysis constantly becomes large; When Faradaic current exceedes maximum current threshold values, occur for preventing short circuit phenomenon, the pulse power (2) cuts out, simultaneously, Z axis motion (6) operates, in driving, lower skateboard (4) drives shaped electrode (7) to be moved upwards up to rollback distance with rollback speed, thus increases the gap between shaped electrode (7) and syringe needle (21);
4th step: feed speed decays according to the parameter values of feed speed attenuation ratio again;
5th step: repeat second step to the 4th step, until be machined to the working depth of setting;
6th step: the pulse power (2) cuts out, switch board (1) controls Z axis motion (6) running, and in driving, lower skateboard (4) drives shaped electrode (7) to move up to withdrawing distance with withdrawing speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410739526.1A CN104526092B (en) | 2014-12-08 | 2014-12-08 | Medical needle head electrochemical processing equipment and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410739526.1A CN104526092B (en) | 2014-12-08 | 2014-12-08 | Medical needle head electrochemical processing equipment and method |
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| Publication Number | Publication Date |
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| CN104526092A true CN104526092A (en) | 2015-04-22 |
| CN104526092B CN104526092B (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410739526.1A Expired - Fee Related CN104526092B (en) | 2014-12-08 | 2014-12-08 | Medical needle head electrochemical processing equipment and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106681200A (en) * | 2016-11-18 | 2017-05-17 | 中国工程物理研究院机械制造工艺研究所 | Speed control device for backtrack of electrode original path in electric machining process |
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| CN101579763A (en) * | 2009-06-25 | 2009-11-18 | 浙江理工大学 | Metallic electrochemistry linear cutting device and method |
| CN101633065A (en) * | 2009-07-30 | 2010-01-27 | 南京航空航天大学 | Microscale pulse electrolysis jet processing system and processing method thereof |
| CN103008808A (en) * | 2012-12-26 | 2013-04-03 | 南京航空航天大学 | Numerical control electrolytic machining integrated control system and control method thereof |
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2014
- 2014-12-08 CN CN201410739526.1A patent/CN104526092B/en not_active Expired - Fee Related
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| CN101579763A (en) * | 2009-06-25 | 2009-11-18 | 浙江理工大学 | Metallic electrochemistry linear cutting device and method |
| CN101633065A (en) * | 2009-07-30 | 2010-01-27 | 南京航空航天大学 | Microscale pulse electrolysis jet processing system and processing method thereof |
| CN103008808A (en) * | 2012-12-26 | 2013-04-03 | 南京航空航天大学 | Numerical control electrolytic machining integrated control system and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106681200A (en) * | 2016-11-18 | 2017-05-17 | 中国工程物理研究院机械制造工艺研究所 | Speed control device for backtrack of electrode original path in electric machining process |
| CN106681200B (en) * | 2016-11-18 | 2018-12-11 | 中国工程物理研究院机械制造工艺研究所 | The speed control unit that electrode original route retracts during a kind of electric machining |
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