CN104526092B - Medical needle head electrochemical processing equipment and method - Google Patents

Medical needle head electrochemical processing equipment and method Download PDF

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Publication number
CN104526092B
CN104526092B CN201410739526.1A CN201410739526A CN104526092B CN 104526092 B CN104526092 B CN 104526092B CN 201410739526 A CN201410739526 A CN 201410739526A CN 104526092 B CN104526092 B CN 104526092B
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China
Prior art keywords
axis motion
switch board
processing
shaped electrode
syringe needle
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CN201410739526.1A
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CN104526092A (en
Inventor
李湘生
任锟
严逢辉
温辉
温一辉
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Wuyishan Jiean Medical Devices Manufacturing Co Ltd
Zhejiang Sci Tech University ZSTU
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Wuyishan Jiean Medical Devices Manufacturing Co Ltd
Zhejiang Sci Tech University ZSTU
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Application filed by Wuyishan Jiean Medical Devices Manufacturing Co Ltd, Zhejiang Sci Tech University ZSTU filed Critical Wuyishan Jiean Medical Devices Manufacturing Co Ltd
Priority to CN201410739526.1A priority Critical patent/CN104526092B/en
Publication of CN104526092A publication Critical patent/CN104526092A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H3/00Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H3/00Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
    • B23H3/04Electrodes specially adapted therefor or their manufacture
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H9/00Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H2400/00Moving 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

A kind of medical needle electrochemical machining equipment and method
Technical field
The present invention relates to a kind of medical needle electrochemistry contour machining equipment and method, belong to and are led for medical needle to be fine To groove and the special device and method of water conservancy diversion hole machined.
Background technology
Mainly there are two kinds for a kind of processing of medical needle, the first processes width on the syringe needle of a diameter of 1.8mm 0.5mm, long 98mm and depth for 0.25mm gathering sill, its two be on the syringe needle of a diameter of 0.5mm process width 0.22mm, Long 0.8mm and the rectangular guiding hole that depth is 0.25mm.At present, the processing of medical needle gathering sill is mainly by, fast wire winding Wire cutting machine tool realizes that wire cutting machine bed structure determines that the production of syringe needle gathering sill has following features with processing technique: Because wire cutting machine tool molybdenum filament uses limited length, therefore the limited amount of single process syringe needle, cause working (machining) efficiency low; In the course of processing, because the vibration of molybdenum filament, the unstable of medium discharge and wire moving back and forth cause fine gathering sill table Face fineness is poor, needs subsequent handling to process to ensure gathering sill surface smoothness, increases manpower and production cost;By Then in, fast wire winding lathe, course of processing molybdenum filament and power consumption be big, and energy consumption is higher;Because pod apertures are not through holes, line Cutting off machine cannot realize the processing of pod apertures, cause syringe needle manufacturing procedure to be disperseed, and repeatedly affect machining accuracy to knife action.
The principle of electrochemistry processing and forming be using between shaped electrode and workpiece pulse feature electricity when galvano-cautery phenomenon come The unnecessary metal of ablation, is required with reaching predetermined accessory size, shape and Surface Machining.Electrochemistry processing and forming can process little Hole and groove to tens microns, and while obtain high dimensional accuracy and great surface quality.Therefore, using electrochemistry processing and forming side Method, can arrange the batch production that multistation realizes syringe needle on equipment work top, improve working (machining) efficiency;Can be without the need for subsequent treatment Operation obtains higher gathering sill surface smoothness, reduces manpower and production cost;Molybdenum filament in wire cutting machine tool can be saved Consume, energy efficient;Achievable syringe needle gathering sill is produced with the substep on the same device of pod apertures, it is ensured that operation is concentrated, Improve machining accuracy.
The content of the invention
In order to the working (machining) efficiency for overcoming existing wire cutting machine tool to exist when producing is low, rooved face fineness is poor, use into This height and operation do not collect medium deficiency, and the present invention provides a kind of medical needle electrochemical machining equipment and method.
The purpose of the present invention is achieved through the following technical solutions:A kind of medical needle electrochemical machining equipment, bag Include switch board, the pulse power, upper lower skateboard, guide upright post, Z axis motion, shaped electrode, fixture, liquid-level switch, multiple clip Supporting table, water pump, drainage screen, electrolyte filtering pond, Y-axis motion, X-axis motion, plant bottom case, workbench, electrolysis Liquid bath, syringe needle, PLC control system and kinetic control system.
The kinetic control system is placed in switch board and with switch board with PLC control system and electrically connects;The pulse power with Switch board is electrically connected, and the both positive and negative polarity of the pulse power is electrically connected respectively with multiple clip supporting table, shaped electrode;X-axis motion bottom Portion is fixed on plant bottom case, and the top of X-axis motion is connected with the bottom of Y-axis motion and can be along X-direction Slide, Y-axis motion top is connected with workbench and can slide along Y direction;X-axis motion, Y-axis motion Electrically connected with switch board by communication control line with Z axis motion;The workbench is provided with electrolytic bath, many folders Tool supporting table is placed in inside electrolytic bath, and is fixedly connected with workbench;Guide upright post is fixed on plant bottom case, Z axis motion Mechanism is fixed on guide upright post;Upper lower skateboard is connected on guide upright post, and can be slided up and down along guide upright post;It is described into Type electrode is fixed on lower skateboard;The fixture can be fixed in multiple clip supporting table on multiple rows of multiple row ground as needed, fixture On be fixed with syringe needle;Liquid-level switch is fixed on electrolytic bath inside and apart from electrolytic bath bottom certain distance;In electrolyte mistake Drainage screen is provided with filter tank;The water inlet of electrolytic bath connects electrolyte filtering pond, the outlet of electrolytic bath by feed tube Electrolyte filtering pond is connected by drain pipe, water pump is provided with feed tube;Water pump, liquid-level switch are electrically connected with switch board.
Further, the shaped electrode is multiple rows of structure, while realizing a plurality of needles head being fixed in single clamp Processing.
Further, the kinetic control system is DSP, and the DSP combines Interpolation control X-axis motion, Y-axis Motion and Z axis motion fine positioning movements.
A kind of method that utilization the said equipment carries out medical needle electro-chemical machining, comprises the following steps:
The first step:By for the initial feed speed of processing, again feed speed attenuation ratio, rollback distance, rollback speed Degree, processing electric current, machining voltage, working depth, processing gap, withdrawing distance and withdrawing speed parameter input switch board;
Second step:The pulse power is opened, and according to machining voltage and processing electric current parameter, exports corresponding voltage and electricity Stream, while state modulator Z axis motion motion of the switch board according to input, so as to drive upper lower skateboard drive shaped electrode to Needle surface is moved, and with the reduction in gap between shaped electrode and syringe needle, electrochemical corrosion processing starts;
3rd step:When the setting of initial feed speed is too fast, causing corrosion speed is less than shaped electrode feed speed, makes into Gap constantly reduces between type electrode and syringe needle, meanwhile, the electric current of electrolysis constantly becomes big;When Faradaic current exceedes maximum current valve During value, to prevent short circuit phenomenon from occurring, the pulse power is closed, meanwhile, the running of Z axis motion, lower skateboard drives in driving Type electrode is moved upwards up to rollback distance with rollback speed, so as to increase the gap between shaped electrode and syringe needle;
4th step:Feed speed is decayed according to the parameter values of feed speed attenuation ratio again;
5th step:Repeat second step to the 4th step, until being machined to the working depth for arranging;
6th step:The pulse power is closed, switch board control Z axis motion running, and lower skateboard drives molding electricity in driving Pole moves up to withdrawing distance with withdrawing speed.
The invention has the beneficial effects as follows:The invention provides a kind of be used for the fine gathering sill of medical needle and water conservancy diversion hole machined Special equipment, the equipment adopt electrochemistry method for processing forming, be capable of achieving syringe needle batch production, improve working (machining) efficiency;Nothing The higher surface smoothness of gathering sill is obtained by needing subsequent treatment operation, manpower and production cost is reduced;Wire cutting can be saved The consumption of molybdenum filament, energy efficient in lathe;Achievable syringe needle gathering sill is produced with the substep on the same device of pod apertures, from And ensure that the operation of production process is concentrated, and effectively increases machining accuracy.
Description of the drawings
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, molding electricity Pole 7, fixture 8, liquid-level switch 9, multiple clip supporting table 10, feed tube 11, water pump 12, drainage screen 13, electrolyte filtering pond 14, Y Shaft movement mechanism 15, X-axis motion 16, plant bottom case 17, Control on Communication circuit 18, workbench 19, electrolytic bath 20, syringe needle 21st, PLC control system 22, kinetic control system 23, drain pipe 24.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of medical needle electrochemical machining equipment of the invention, including switch board 1, the pulse power 2, up and down Slide plate 4, guide upright post 5, Z axis motion 6, shaped electrode 7, fixture 8, liquid-level switch 9, multiple clip supporting table 10, water pump 12, Drainage screen 13, electrolyte filtering pond 14, Y-axis motion 15, X-axis motion 16, plant bottom case 17, workbench 19, electrolysis Liquid bath 20, syringe needle 21, PLC control system 22 and kinetic control system 23.
The kinetic control system 23 is placed in switch board 1 and with switch board 1 with PLC control system 22 and electrically connects;Pulse Power supply 2 is electrically connected with switch board 1, and the both positive and negative polarity of the pulse power 2 is electrically connected respectively with multiple clip supporting table 10, shaped electrode 7;X The bottom of shaft movement mechanism 16 is fixed on plant bottom case 17, and the top of X-axis motion 16 connects with the bottom of Y-axis motion 15 Connect and can slide along X-direction, the top of Y-axis motion 15 is connected with workbench 19 and can slide along Y direction; X-axis motion 16, Y-axis motion 15 and Z axis motion 6 are electrically connected by communication control line 18 with switch board 1;Institute State workbench 19 and be provided with electrolytic bath 20, the multiple clip supporting table 10 is placed in inside electrolytic bath 20, and with workbench 19 It is fixedly connected;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 It is connected on guide upright post 5, and can slides up and down along guide upright post 5;The shaped electrode 7 is bolted on downslide On plate 4;
The fixture 8 can be fixed in multiple clip supporting table 10 on multiple rows of multiple row ground as needed, and on fixture 8 syringe needle is fixed with 21, the batch production of syringe needle is capable of achieving, improve working (machining) efficiency;Liquid-level switch 9 is fixed on the inside of electrolytic bath 20 and distance electrolysis The bottom certain distance of liquid bath 20;Drainage screen 13 is provided with electrolyte filtering pond 14;The water inlet of electrolytic bath 20 passes through feed liquor The connection electrolyte filtering of pipe 11 pond 14, the outlet of electrolytic bath 20 connects electrolyte filtering pond 14 by drain pipe 24, is entering Liquid pipe 11 is provided with water pump 12;Water pump 12, liquid-level switch 9 are electrically connected with switch board 1.
The shaped electrode 7 is multiple rows of structure, realizes being processed while a plurality of needles 21 being fixed in single clamp 8. The kinetic control system 23 is DSP, and the DSP combines Interpolation and controls X-axis motion 16, Y-axis motion 15 and Z The fine positioning movements of shaft movement mechanism 6.
As shown in Fig. 2 the method for carrying out medical needle electro-chemical machining using the said equipment, comprises the following steps:
The first step:By for the initial feed speed of processing, again feed speed attenuation ratio, rollback distance, rollback speed Degree, processing electric current, machining voltage, working depth, processing gap, withdrawing distance and withdrawing speed parameter input switch board 1, deposit In being stored in controller internal RAM fixing address space;
Second step:The pulse power 2 is opened, according to machining voltage and processing electric current parameter, export corresponding voltage and Electric current, while switch board 1 is moved according to the state modulator Z axis motion 6 of input, so as to drive upper lower skateboard 4 to drive molding To the apparent motion of syringe needle 21, with the reduction in gap between shaped electrode 7 and syringe needle 21, electrochemical corrosion processing starts electrode 7;
3rd step:When the setting of initial feed speed is too fast, causing corrosion speed is less than the feed speed of shaped electrode 7, makes Gap constantly reduces between shaped electrode 7 and syringe needle 21, meanwhile, the electric current of electrolysis constantly becomes big;When Faradaic current exceedes maximum During current threshold, to prevent short circuit phenomenon from occurring, the pulse power 2 is closed, meanwhile, Z axis motion 6 is operated, and is glided in driving Plate 4 drives shaped electrode 7 to be moved upwards up to rollback distance with rollback speed, so as to increase between shaped electrode 7 and syringe needle 21 Gap;
4th step:Feed speed is decayed according to the parameter values of feed speed attenuation ratio again;
5th step:Repeat second step to the 4th step, until being machined to the working depth for arranging;
6th step:The pulse power 2 is closed, and the control Z axis of switch board 1 motion 6 is operated, and lower skateboard 4 drives in driving Type electrode 7 moves up to withdrawing distance with withdrawing speed.
Above-described embodiment is used for illustrating the present invention, rather than limits the invention, the present invention spirit and In scope of the claims, any modifications and changes made to the present invention both fall within protection scope of the present invention.

Claims (1)

1. a kind of medical needle method for electrochemical machining, the method realized by medical needle electrochemical machining equipment, the doctor Include switch board (1), the pulse power (2), upper lower skateboard (4), guide upright post (5), Z axis motion with syringe needle electrochemical machining equipment Mechanism (6), shaped electrode (7), fixture (8), liquid-level switch (9), multiple clip supporting table (10), water pump (12), drainage screen (13), Electrolyte filtering pond (14), Y-axis motion (15), X-axis motion (16), plant bottom case (17), workbench (19), electrolysis Liquid bath (20), syringe needle (21), PLC control system (22) and kinetic control system (23);
The kinetic control system (23) is placed in switch board (1) and with switch board (1) with PLC control system (22) and electrically connects; The pulse power (2) is electrically connected with switch board (1), and the both positive and negative polarity of the pulse power (2) is electric with multiple clip supporting table (10), molding respectively Pole (7) electrically connects;X-axis motion (16) bottom is fixed on plant bottom case (17), the top of X-axis motion (16) and Y The bottom of shaft movement mechanism (15) connects and can slide along X-direction, with workbench (19) at the top of Y-axis motion (15) Connect and can slide along Y direction;X-axis motion (16), Y-axis motion (15) and Z axis motion (6) lead to Cross communication control line (18) to electrically connect with switch board (1);The workbench (19) is provided with electrolytic bath (20), the multiple clip Supporting table (10) is placed in electrolytic bath (20) inside, and is fixedly connected with workbench (19);Guide upright post (5) is fixed on equipment bottom On seat (17), 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);The shaped electrode (7) is fixed on lower skateboard (4);The fixture (8) can root According to being fixed in multiple clip supporting table (10) with needing multiple rows of multiple row, syringe needle (21) is fixed with fixture (8);Liquid-level switch (9) It is fixed on electrolytic bath (20) inside and apart from electrolytic bath (20) bottom certain distance;It is provided with electrolyte filtering pond (14) Drainage screen (13);The water inlet of electrolytic bath (20) connects electrolyte filtering pond (14), electrolytic bath by feed tube (11) (20) outlet connects electrolyte filtering pond (14) by drain pipe (24), and water pump (12) is provided with feed tube (11);Water Pump (12), liquid-level switch (9) are electrically connected with switch board (1);Characterized in that, the method is comprised the following steps:
The first step:Will be used for processing initial feed speed, again feed speed attenuation ratio, rollback distance, rollback speed, add Work electric current, machining voltage, working depth, processing gap, withdrawing distance and withdrawing speed parameter input switch board (1);
Second step:The pulse power (2) is opened, and according to machining voltage and processing electric current parameter, exports corresponding voltage and electricity Stream, while state modulator Z axis motion (6) motion of the switch board (1) according to input, so as to drive upper lower skateboard (4) to drive Shaped electrode (7) to syringe needle (21) apparent motion, with the reduction in gap between shaped electrode (7) and syringe needle (21), electrochemistry Corrosion processing starts;
3rd step:When the setting of initial feed speed is too fast, causing corrosion speed is less than shaped electrode (7) feed speed, makes into Gap constantly reduces between type electrode (7) and syringe needle (21), meanwhile, the electric current of electrolysis constantly becomes big;When Faradaic current exceedes most During high current threshold values, to prevent short circuit phenomenon from occurring, the pulse power (2) is closed, meanwhile, Z axis motion (6) running drives Upper lower skateboard (4) drives shaped electrode (7) to be moved upwards up to rollback distance with rollback speed, so as to increase shaped electrode (7) with Gap between syringe needle (21);
4th step:Feed speed is decayed according to the parameter values of feed speed attenuation ratio again;
5th step:Repeat second step to the 4th step, until being machined to the working depth for arranging;
6th step:The pulse power (2) is closed, switch board (1) control Z axis motion (6) running, lower skateboard (4) band in driving Dynamic shaped electrode (7) moves up to withdrawing distance with withdrawing speed.
CN201410739526.1A 2014-12-08 2014-12-08 Medical needle head electrochemical processing equipment and method Active CN104526092B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN104526092B true CN104526092B (en) 2017-04-19

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Publication number Priority date Publication date Assignee Title
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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CN101579763A (en) * 2009-06-25 2009-11-18 浙江理工大学 Metallic electrochemistry linear cutting device and method
CN101633065B (en) * 2009-07-30 2011-01-05 南京航空航天大学 Microscale pulse electrolysis jet processing system and processing method thereof
CN103008808B (en) * 2012-12-26 2015-06-03 南京航空航天大学 Numerical control electrolytic machining integrated control system and control method thereof
CN203459785U (en) * 2013-08-26 2014-03-05 南京航空航天大学 Large-size multi-shaft linkage electrochemical machining machine tool

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