CN1557606A - Electric spark mechanical composite grinding method and machine for non-conductive superhard material - Google Patents

Electric spark mechanical composite grinding method and machine for non-conductive superhard material Download PDF

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Publication number
CN1557606A
CN1557606A CNA200410023547XA CN200410023547A CN1557606A CN 1557606 A CN1557606 A CN 1557606A CN A200410023547X A CNA200410023547X A CN A200410023547XA CN 200410023547 A CN200410023547 A CN 200410023547A CN 1557606 A CN1557606 A CN 1557606A
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grinding
conductive
electrode
electric spark
machine
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CN100513056C (en
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刘永红
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China University of Petroleum UPC East China
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China University of Petroleum UPC East China
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Abstract

The present invention is composite electric spark machine grinding method and machine apparatus for machining non-conductive super-hard material. During the machine, the rotary conducting grinding wheel is used as one electrode for electron spark grinding, electrode sheet feeding along the surface of the workpiece as the other electrode, and the spark discharge in the surface of workpiece between the conducting grinding wheel and the sheet electrode makes the surface of the workpiece of non-conductive super-hard material carbonized and denatured for being eliminated via mechanical grinding. The machine apparatus includes machining unit, pulse power source, control system and liquid supplying system. The sheet for machining is wound onto a barrel, which is driven by a DC motor for servo motion. The present invention has high machining efficiency on non-conductive super-hard material, high surface quality and low machining cost.

Description

Non-conductive material electric spark machinery composite grinding method and lathe
Technical field
The invention belongs to field of machining, relate to a kind of non-conductive material electric spark machinery composite grinding method and corresponding machine tool.
Background technology
Superhard materials such as non-conductive diamond, cubic boron nitride and engineering ceramics are with performances such as its good power, heat, chemistry, sound, light, electricity, in fields such as modern industry, national defence and new and high technology, obtain increasingly extensive application, and huge social and economic benefit have been brought, because superhard material has high hardness and bigger fragility, its processing and forming is very difficult.Superhard material for conduction, can directly adopt electric machining process such as edm forming, line cutting and grinding because of it, obtained bigger progress, and for non-conductive material, at present people are still untapped goes out a kind of comparatively perfect process technology, the exploitation of its process technology has become an urgent demand of industrial quarters with application, and has been subjected to the great attention of world many countries.
At present, non-conductive material processing method commonly used is diamond wheel grinding processing, but its processing cost height, the emery wheel loss is big, efficient is low, and exist very big machinery to remove active force during grinding between emery wheel and workpiece, the service life that easily makes surface of the work produce micro-crack, reduce part, the price height of superhard material grinding machine in addition is as the CPG series special purpose grinder of Japanese Osaka diamond industrial group development and CP series emery wheel etc.For improving this situation, Chinese scholars has been inquired into the possibility in the grinding of spark erosion technique introducing non-conductive material, protect as Japanese scholar's Kubo field, earth house eight youths, the clear hero of black pine etc. has been developed mechanical and electrolytic electric spark composite grinding (MEEC) method, Chinese scholar Zhang Chonggao, Liu Yonghongs etc. have been developed mechanical electric pulse electrolysis electric spark composite grinding process technology, the mechanical grinding method height that the productivity ratio of these composite grinding method grinding non-conductive materials is more simple, but use electrolyte man-hour owing to add, the easy-to-rust lathe, also discharge some harmful water electrolytic gas simultaneously in the process, processing environment is poor, therefore fails to be applied in actual production.At present, the domestic and international still untapped non-conductive material electric spark grinding technology and equipment that goes out can be used for actual production.
Summary of the invention
The purpose of this invention is to provide a kind of non-conductive material electric spark machinery composite grinding processing method and machine tool, the advantage of comprehensive spark machined and mechanical grinding processing, not only improve grinding efficient, machining accuracy and the surface quality of non-conductive material, and the loss and the processing cost of reduction emery wheel, also can process other non-conductive difficult-to-machine material, as high strength composite, marble and glass etc.
Principle of the present invention: utilize the thin electrode sent to along non-conductive material surface of the work automatic servo and spark discharge effect between the rotation conductive abrasive wheel to reach the purpose that ablation is processed, discharge process also forms one deck carbonization and metamorphic layer on workpiece when removing non-conductive material; Carbonization and metamorphic layer are mainly removed in the mechanical grinding effect of emery wheel; Non-conductive emulsion dashes and annotates between discharging gap, is used to compress discharge channel, gets rid of galvanic corrosion product, cooling discharge electrode and emery wheel.
Non-conductive material electric spark machinery composite grinding machining tool mainly is made up of processing main frame, the pulse power, servo-control system and working solution feed system etc.The processing main frame comprises that can be controlled by control signal carries out the workbench of two dimensional motion, is controlled by control signal and can makes the conduction emery wheel of shifting movement up and down or emery wheel swivel head, lathe bed, automatic feeding mechanism under the DC servo motor control action along column, makes that the Electro Spark Discharge Grinding process is stable carries out constantly.The energy needed when pulse power provides EDM Grinding; The effect of control system is control workbench, emery wheel, plate electrode presses projected path and speed is moved, and the EDM Grinding process stabilization is gone on constantly, to obtain needed machining accuracy and surface quality; The working solution feed system provides non-conductive emulsion to electro discharge machining gapping place, and carries out filtration cycle.
The present invention compared with prior art has following advantage:
1. combine the advantage of spark machined and mechanical grinding processing, the processing non-conductive material improves 2~4 times than simple mechanical grinding efficient, reduces cost 3~5 times.
2.0.08 being close to the surface of non-conductive material, the plate electrode that~0.15mm is thick sends to conductive abrasive wheel, therefore the spark discharge energy between plate electrode and conductive abrasive wheel can be thought to act directly on the non-conductive surface of the work, its discharge process is not subjected to the influence of machined material character, discharge process can carry out in machining area uniformly and stably, mechanical grinding processing is mainly used in carbonization and the metamorphic layer of removing after discharge is processed, remove the simple mechanical grinding of force rate and reduce by 2~4 times, machined surface quality improves 2~4 times.
By adjust spark discharge and mechanical grinding parameter can on same lathe, realize to non-conductive material slightly, in, fine finishining, select bigger peak point current and pulse width during as roughing for use, and bigger grinding force, at this moment, act as the master with the electric spark ablation; Fine finishining is selected with less peak point current and pulse width, and less grinding force, at this moment, act as the master with mechanical grinding.
4. make the electric spark grinding working solution with non-conductive emulsion, process does not have electrolysis and exists, and has avoided processing method problem such as electrolysis electric spark machinery composite grinding, the problem includes: processing environment is poor, the problem of easy-to-rust lathe.
5. can online trimming wheel or conductive abrasive wheel.
Description of drawings
Fig. 1 is the general structure schematic diagram of non-conductive material electric spark machinery composite grinding lathe of the present invention.
Fig. 2 is the structural representation of the mechanical composite grinding machine tooling of non-conductive material electric spark of the present invention mechanism.
Fig. 3 be among Fig. 2 automatically the A-A of feeding mechanism to view.
The specific embodiment
Referring to Fig. 1.Non-conductive material electric spark machinery composite grinding lathe of the present invention mainly is made up of three parts.The 1st, control electric cabinet, comprising computer, control circuit, the pulse power, guidance panel etc., computer is by control and the management of control circuit realization to lathe; The 2nd, the processing main frame; The 3rd, working liquid container is for electric spark machinery composite grinding process provides cycle working fluid.
Referring to Fig. 2.The organisation of working of lathe of the present invention comprises workbench 4, drives workpiece and does the feeding working motion; Workpiece to be machined 5; Conductive abrasive wheel 6 can be conduction emery wheel or other conductive casters; Nozzle 7 is to machining area spray working solution; Feeding mechanism 8; Sending to of DC servo-motor 9 control strip electrodes continues to carry out to keep the Electro Spark Discharge Grinding process; Plate electrode 10 is the thick copper sheet of 0.08~0.15mm.
Referring to Fig. 3.The automatic feeding mechanism of lathe of the present invention comprises DC servo-motor 9, plate electrode 10, cover plate 11, locking nut 12, cover plate housing screw 13, storage sheet tube 14, storage sheet tube and motor supporter 15, motor housing screw 16.

Claims (5)

1. non-conductive material electric spark machinery composite grinding processing method, in process, thin electrode is sent to rotation conductive abrasive wheel electrode along the non-conductive material surface of the work, and spark discharge effect and mechanical grinding effect continue to carry out.
2. electric spark grinding method as claimed in claim 1 is characterized in that: conductive abrasive wheel is an electrode of EDM Grinding, and rotates for conduction emery wheel or other conductive casters.
3. electric spark grinding method as claimed in claim 1 is characterized in that: described plate electrode is another electrode of EDM Grinding, and makes the discharge servo feed along surface of the work and move.
4. an electric spark machinery composite grinding lathe comprises processing main frame, the pulse power, servo-control system and working solution feed system.Wherein process main frame and comprise that can be controlled by control signal carries out the workbench of two dimensional motion, is controlled by control signal and can makes the conduction emery wheel of shifting movement up and down or emery wheel swivel head, lathe bed, automatic feeding mechanism under the Control of DC Servo Motor effect along column.
5. automatic feeding mechanism as claimed in claim 4 is characterized in that: thin electrode is wrapped on the storage sheet tube, and this storage sheet tube is done the motion of discharge servo feed to conductive abrasive wheel under the drive of DC servo-motor.
CNB200410023547XA 2004-01-16 2004-01-16 Electric spark mechanical composite grinding method and machine for non-conductive superhard material Active CN100513056C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB200410023547XA CN100513056C (en) 2004-01-16 2004-01-16 Electric spark mechanical composite grinding method and machine for non-conductive superhard material

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Application Number Priority Date Filing Date Title
CNB200410023547XA CN100513056C (en) 2004-01-16 2004-01-16 Electric spark mechanical composite grinding method and machine for non-conductive superhard material

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CN1557606A true CN1557606A (en) 2004-12-29
CN100513056C CN100513056C (en) 2009-07-15

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100423899C (en) * 2006-06-22 2008-10-08 上海交通大学 Method for on-line manufacturing micro-electrode based on micro-electrolyze grinding of cutting-edge electrode
CN102398193A (en) * 2010-09-17 2012-04-04 香港理工大学 Grinding auxiliary electrochemical discharge machining tool and method
CN104874880A (en) * 2015-06-15 2015-09-02 中国石油大学(华东) Servomechanism for milling electric spark made of non-conducting material
TWI671151B (en) * 2017-12-01 2019-09-11 財團法人金屬工業研究發展中心 Electrochemical grinding device and conductive grinding wheel thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100423899C (en) * 2006-06-22 2008-10-08 上海交通大学 Method for on-line manufacturing micro-electrode based on micro-electrolyze grinding of cutting-edge electrode
CN102398193A (en) * 2010-09-17 2012-04-04 香港理工大学 Grinding auxiliary electrochemical discharge machining tool and method
CN104874880A (en) * 2015-06-15 2015-09-02 中国石油大学(华东) Servomechanism for milling electric spark made of non-conducting material
TWI671151B (en) * 2017-12-01 2019-09-11 財團法人金屬工業研究發展中心 Electrochemical grinding device and conductive grinding wheel thereof

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