CN104439572A - Electroerosion machining system and method - Google Patents
Electroerosion machining system and method Download PDFInfo
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- CN104439572A CN104439572A CN201310419535.8A CN201310419535A CN104439572A CN 104439572 A CN104439572 A CN 104439572A CN 201310419535 A CN201310419535 A CN 201310419535A CN 104439572 A CN104439572 A CN 104439572A
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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
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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
- B23H3/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits
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Abstract
The invention relates to an electroerosion machining system. The electroerosion machining system comprises an electrode for machining workpieces, a power supply for exciting the electrode and the workpieces to become opposite polarities, an electrolyte supply device for supplying electrolyte between the electrode and the workpieces, an operation device for moving the electrode corresponding to the workpieces, and a control device for controlling the operation device to move the electrode according to a machining path set by the control device for machining the workpieces layer by layer, determining the material volume of the workpieces removed by the electrode and the loss value of the electrode after the machining of one or more machined layers, dividing the following one or more machined layers into multiple machined blocks along the machining path, determining the volume of the machined blocks and compensating the loss of the electrode according to the removed material volume of the workpieces, the loss value of the electrode and the volume of the machined blocks. The invention further relates to an electroerosion machining method for compensating the loss of the electrode.
Description
Technical field
The present invention, about a kind of galvano-cautery system of processing and method, particularly relates to a kind of galvano-cautery system of processing of compensating the loss of electrode and method.
Background technology
Galvano-cautery processing (Electroerosion Machining, EEM) needs by electric spark or electric arc melting workpiece the part that is removed, works the work piece into certain shape.Provide DC voltage between workpiece and electrode, produce the electric arc of electric spark or moment.Leave the gap of about 0.01 millimeter to about 0.50 millimeter between the end of electrode and workpiece, and immerse in electrolyte.Electrolyte in gap ionizes because of direct current part, produces the electric arc of electric spark or moment between electrode and workpiece.Electric spark and/or electric arc produce enough heats and carry out a small amount of workpiece material of melting, and form dolly dimple at surface of the work, then electrolyte washes away the material of melting.
Galvano-cautery processing is the material being removed workpiece under the electric field by a series of electric spark produced between electrode and workpiece.The path that electrode edge is estimated is near workpiece.A series of electric spark produces continuous print dolly dimple on workpiece, and electrode removes material along the machining path estimated.Galvano-cautery processing is generally used for processing hard metal or with additive method (such as, lathe, drill bit etc.) very difficult to machine material.
But in galvano-cautery process, electrode meeting loss, becomes shorter and shorter, more and more less.So with the surface possibility out-of-flatness of the workpiece of this electrode machining, the working depth of expection can not be reached, thus affect galvano-cautery processing.
Therefore, be necessary to provide a kind of galvano-cautery system of processing and method to solve at least one technical problem above mentioned.
Summary of the invention
One aspect of the present invention is to provide a kind of galvano-cautery system of processing.This galvano-cautery system of processing comprises: electrode, is used for processing work; Power supply, is used for encouraging described electrode and described workpiece to be contrary polarity; Electrolyte supply device, is used to provide electrolyte between described electrode and described workpiece; Operating means, is used for relative to electrode described in described workpiece movable; And control device.Control device is used for: control described operating means and move described electrode according to the machining path that described control device sets and process described workpiece with carrying out a machined layer machined layer, the volume of material that after determining to process one or more described machined layer, described workpiece is removed by described electrode and the loss value of described electrode, then one or more machined layer are divided into multiple processing block along described machining path, determine the volume of described processing block, and the volume of the material to be removed according to described workpiece, the loss of electrode described in the loss value of described electrode and the volume compensation of described processing block.
Another aspect of the present invention is to provide a kind of galvano-cautery processing method.This galvano-cautery processing method comprises step: drive electrode is relative to workpiece motion s; Voltage and electrolyte is provided to process described workpiece according to a machining path machined layer machined layer between described electrode and described workpiece; The volume of material that after determining to process one or more described machined layer, described workpiece is removed by described electrode and the loss value of described electrode; Then one or more machined layer are divided into multiple processing block along described machining path; Determine the volume of described processing block; And the loss of electrode described in the volume compensation of the volume of material, the loss value of described electrode and the described processing block to be removed according to described workpiece.
The loss of volume to electrode of the material that galvano-cautery system of processing of the present invention and processing method are removed according to workpiece compensates, and this precision compensated is higher.
Accompanying drawing explanation
Be described for embodiments of the present invention in conjunction with the drawings, the present invention may be better understood, in the accompanying drawings:
Figure 1 shows that the schematic diagram of an embodiment of galvano-cautery system of processing of the present invention;
Figure 2 shows that the schematic diagram of an embodiment of workpiece of the present invention local;
Figure 3 shows that the schematic diagram of an embodiment of machining path of the present invention;
Figure 4 shows that the schematic diagram of the control device control operation device of galvano-cautery system of processing of the present invention and an embodiment of power supply;
Figure 5 shows that the flow chart of an embodiment of galvano-cautery processing method of the present invention.
Detailed description of the invention
Unless otherwise defined, technical term used herein or scientific terminology should be in field belonging to the present invention the ordinary meaning that the personage with general technical ability understands." first " " second " used in patent application specification of the present invention and claims and similar word do not represent any order, quantity or importance, and are only used to distinguish different parts." comprise " or the similar word such as " comprising " mean to appear at " comprising " or " comprising " before element or object contain the element or object that appear at " comprising " or " comprising " presented hereinafter and equivalent, do not get rid of other elements or object." connection " or " being connected " etc. similar word be not defined in physics or the connection of machinery, no matter but can comprise electrical connection, be direct or indirectly.
Figure 1 shows that the schematic diagram of the galvano-cautery system of processing 1 of an embodiment.Galvano-cautery system of processing 1 can be used to process jet blade, aerospace components, turbine components, aeroengine, impeller or other device can processed by galvano-cautery.In galvano-cautery processing, form the shape of expection by electric spark or electric arc from removing materials metallic conduction workpiece.In the present embodiment, galvano-cautery system of processing 1 forms the structure expected with being used for a machined layer machined layer from workpiece 20 removing materials.Galvano-cautery system of processing 1 comprises control device 10, operating means 11, power supply 14, electrolyte supply device 15 and electrode 16.
Operating means 11 is used for relative to workpiece 20 traveling electrode 16." movement " that use in patent application specification of the present invention and claims not only can refer to along one or more linear axis translation, also can refer to rotate along one or more rotating shaft.In certain embodiments, operating means 11 comprises lathe, and lathe comprises servomechanism installation, such as, and servomotor and spindle motor.Electrode 16 is installed on operating means 11 to carry out galvano-cautery processing.Servomotor can drive electrode 16 and/or workpiece 20 with the speed of setting and path relative motion, and spindle motor drive electrode 16 and/or workpiece 20 are with the rotational speed of setting.
In one embodiment, with three axis machining method processing work 20.Wherein, electrode 16 is relative to workpiece 20 along three linear axis, and such as, X-axis, Y-axis and Z axis, move.In another embodiment, with five-axis robot method processing work 20.Wherein, electrode 16 is relative to workpiece 20 along three linear axis, and such as, X-axis, Y-axis and Z axis, and two rotating shafts, such as, the A axle around X-axis, the B axle around Y-axis and/or the C axle around Z axis, move.In an embodiment again, electrode 16 opposite piece 20 axially moves four axis or more than five s'.So, by the machined layer of the removable three-dimensional of Multi-axis Machining method electrode 16, the machined layer of this three-dimensional does not in one plane extend.
In one embodiment, workpiece 20 transfixion, electrode 16 moves.In another embodiment, electrode 16 transfixion, workpiece 20 moves.In a further embodiment, electrode 16 and workpiece 20 all move.Operating means 11 is used in one or more axially traveling electrode 16 and at one or more axially travelling workpiece 20.Such as, in five-axis robot, electrode 16 moves along Y-axis and Z axis, and workpiece 20 moves along X-axis and rotates along B axle and C axle.Example is only used to illustrate, is not limited to this.
Electrode 16 is used for processing work 20.In the illustrated embodiment, electrode 16 comprises the cross section of tubulose, and in another embodiment, electrode 16 can have leg-of-mutton, rectangle or polygonal cross section.
It is contrary polarity that power supply 14 is used for exciting electrode 16 and workpiece 20.In this embodiment, power supply 14 comprises DC pulse generator (not shown).Electrode 16 and workpiece 20 are connected to positive pole and the negative pole of power supply 14.In one embodiment, electrode 16 is as negative electrode, and workpiece 20 is as anode.In another embodiment, electrode 16 is as anode, and workpiece 20 is as negative electrode.Power supply 14 provides voltage to electrode 16 and workpiece 20, and when electrode 16 is near workpiece 20, the end of electrode 16 produces electric spark and removes the material of workpiece 20 surface near the end of electrode 16.
Control device 10 comprises digital control (Numerical Control, NC) or computer numerical control (CNC) (Computer Numerical Control, CNC) device.In the present embodiment, control device 10 comprises computer numerical control device 12 and galvano-cautery control device 13.Computer numerical control device 12 comprises sequencing or pre-programmed instruction, this instruction is based on CAD (Computer-Aided Design, CAD) and/or in computer-aided manufacturing (Computer-Aided Manufacturing, CAM) description of workpiece 20 is set.Computer numerical control device 12 is connected to operating means 11, according to specific running parameter, such as, and feed rate, shaft position or the speed of mainshaft etc., control operation device 11 drive electrode 16.In another embodiment, computer numerical control device 12 processes the instruction that receives and/or user's input comes control operation device 11 and electrode 16.In one embodiment, computer numerical control device 12 can comprise central processing unit (Central Processing Unit, CPU), communication unit and storage device, such as, read-only storage (Read Only Memory, and/or random access memory (Random AccessMemory, RAM) ROM).
Galvano-cautery control device 13 is connected to power supply 14, carrys out the state of monitoring power supply 14.In one embodiment, galvano-cautery control device 13 comprises one or more sensor (not shown), and such as, voltage and/or current measurement circuit carry out the state of voltage in the gap between monitoring electrode 16 and workpiece 20 and/or electric current.Sensor can be arranged at power supply 14 or independent placement.In one embodiment, galvano-cautery control device 13 comprises microprocessor or other calculation elements, time set, voltage comparator device and/or data storage device etc.In addition, galvano-cautery control device 13 is connected with computer numerical control device 12 and controls power supply 14 and operating means 11.
Electrolyte supply device 15 is used to provide electrolyte between electrode 16 and workpiece 20, electrolyte flow connecting electrode 16 and workpiece 20.In one embodiment, electrolyte supply device 15 is connected to Computer Control Unit 12, receives instruction from Computer Control Unit 12, provides electrolyte between electrode 16 and workpiece 20 according to instruction.Arrow 160 and 161 shows electrolyte flow direction.Electrolyte provides path to electric discharge, thus produces electric spark between electrode 16 and workpiece 20.In galvano-cautery process, power supply 14 provides pulse voltage between electrode 16 and workpiece 20, forms the shape of expection with carrying out a machined layer machined layer from removing materials workpiece 20, and the material scaled off washes away by electrolyte simultaneously.
In the present embodiment, galvano-cautery system of processing 1 is included at least one trigger point that in tool setting pattern, power pole 16 is touched.In the illustrated embodiment, the first trigger point 18 and the second trigger point 19 are positioned at workpiece 20 around, such as, respectively at front and the rear of workpiece 20.Before and after one or more machined layer is processed in galvano-cautery, Computer Control Unit 12 control operation device 11 carrys out drive electrode 16 and touches the first trigger point 18 and the second trigger point 19 respectively, determines the length of electrode 16.In another embodiment, a trigger point 18 or 19 is only had to be used.In one embodiment, reference substance (not shown), such as, the fixture of workpiece 20, can be used as trigger point 18,19.In another embodiment, a position of workpiece 20 can be used as trigger point 18,19.
Figure 2 shows that the schematic diagram of the local of the workpiece 20 of an embodiment.Multiple machined layer 22 removes the rear shape forming the workpiece 20 of expection.Object only in order to illustrate, machined layer 22 is separated by lines each other, but on the workpiece 20 of reality, those lines do not exist.Electrode 16 1 machined layer machined layer ground processing work 20.At least one machined layer 22 is three-dimensional machined layer.In the present embodiment, each machined layer 22 is all three-dimensional, and it does not extend in same plane, so can form the geometry of complicated three-dimensional on workpiece 20.In the illustrated embodiment, workpiece 20 is discoid, and machined layer 22 is arch.In another embodiment, machined layer 22 can be other 3D shape.In one embodiment, machined layer 22 is of similar shape and volume.In another embodiment, machined layer 22 has different shapes and volume.Each machined layer 22 is divided into multiple processing block 24 along machining path.Electrode 16 processes machined layer 22 along a machining path processing block processing block.
Figure 3 shows that the schematic diagram of the machining path 30 of an embodiment.Referring to figs. 2 and 3, the path of machining path 30 for walking when electrode 16 removes the material of workpiece 20.In one embodiment, operating means 11 removes the material of machined layer 22 along machining path 30 traveling electrode 16.Computer Control Unit 12 is according to expecting that the shape of the workpiece 20 obtained sets some machining paths 30.In one embodiment, machining path 30 set and stores in the memory unit before processing work 20.Machining path 30 is divided into multiple processing sections 32, and processing sections 32 is straight line, and machining path 30 is curve.The part that machining path 30 curvature is larger is divided into the shorter processing sections of length 32, and the part that machining path 30 curvature is less is divided into the longer processing sections of length 32, and the length of processing sections 32 is equal not to the utmost.So form long bending machining path 30 with some short straightways.Processing sections 32 also sets in Computer Control Unit 12.Electrode 16 moves along processing sections 32 and removes corresponding processing block 24.The number of processing sections 32 equals the number of processing block 24.
Figure 4 shows that the control device 10 control operation device 11 of the galvano-cautery system of processing 1 of an embodiment and the schematic diagram of power supply 14.In conjunction with reference to figure 1, control device 10 is used for control operation device 11 and carrys out machined layer machined layer ground processing work 20 according to the machining path traveling electrode 16 that control device 10 sets.The volume of material that after control device 10 is used for determining to process one or more machined layer, workpiece 20 is removed by electrode 16 and the loss value of electrode 16.Control device 10 is used for one or more machined layer to be then divided into multiple processing block along machining path, and determines the volume of processing block.Control device 10 is used for the loss of volume compensation electrode 16 of the volume of material, the loss value of electrode 16 and the processing block that are removed according to workpiece 20.
The Computer Control Unit 12 of control device 10 comprises numerical control kernel 120 and programmable logic controller (PLC) 122(or programmable machine bed controller).Numerical control kernel 120 and programmable logic controller (PLC) 122 are cooperated to carry out control operation device 11, and programmable logic controller (PLC) 122 is connected with galvano-cautery control device 13.In the present embodiment, numerical control kernel 120 comprises main program module 124 and loss correction module 126.Main program module 124 comprises instruction, such as, and machining path etc.In the present embodiment, main program module 124 is used for according to machining path determination electrode 16 position (x, y, z) of processing end that processes.The position (x, y, z) of processing end is the initial position before compensation for electrode wear.
The length of electrode 16 before and after loss correction module 126 is used for determining processing in tool setting pattern, and certain operation has been connected with main program module 124, programmable logic controller (PLC) 122 and galvano-cautery controller 13 in tool setting pattern.In one embodiment, loss correction module 126 can embed in main program module 124.Programmable logic controller (PLC) 122 performs some operations relevant to sequential, such as, tool changing, start or stop motor, change workpiece, unlatching or close the supply of electrolyte.
Referring to figs. 1 to Fig. 4, in an embodiment, main program module 124 sends initial voltage and/or the current parameters of galvano-cautery processing, gives power supply 14 through programmable logic controller (PLC) 122 and galvano-cautery control device 13.Meanwhile, main program module 124 coordinates programmable logic controller (PLC) 122 to move to above the first trigger point 18 according to instruction control operation device 11 drive electrode 16.
Galvano-cautery system of processing 1 enters tool setting pattern.Loss correction module 126 sends the initial voltage of tool setting pattern and/or current parameters to power supply 14.In certain embodiments, the initial voltage of tool setting pattern and/or the value of current parameters are less than the initial voltage of galvano-cautery processing and/or the value of current parameters, to avoid damaging electrode 16 in tool setting pattern.Then, electrode 16 moves down until touch the first trigger point 18 gradually, produces short circuit between electrode 16 like this and the first trigger point 18.Galvano-cautery control device 13 detects short-circuit voltage and produces short circuit triggering signal to loss correction module 126.Loss correction module 126 is connected cooperation and carrys out control operation device 11 promptly withdrawn electrode 16 with main program module 124 and programmable logic controller (PLC) 122, and loss correction module 126 calculates the length of electrode 16.In one embodiment, the calculating of the length of electrode 16 and recalling simultaneously and carrying out in real time of electrode 16.
After completing tool setting, initial voltage during normal process and/or current parameters are stored.The first machined layer that main program module 124 coordinates programmable logic controller (PLC) 122 control operation device 11 drive electrode 16 to start according to the machining path processing work 20 in main program module 124.In certain embodiments, the value of the initial voltage that the voltage in galvano-cautery processing and/or the value of current parameters and galvano-cautery are processed and/or current parameters is identical or different, the value of galvano-cautery control device 13 adjustable voltage and/or current parameters.Voltage in processing between galvano-cautery control device 13 monitoring electrode 16 and workpiece 20 and/or the state of electric current.
Main program module 124 determines the volume of the material of the first machined layer that electrode 16 removes from workpiece 20.In one embodiment, initial volume and the volume of the workpiece 20 processed after the first machined layer of the workpiece 20 before main program module 124 calculating processing first machined layer, determine the volume of the material of the first machined layer be removed by the difference of volume before and after calculating processing.In one embodiment, the numerical control machining simulation system (not shown) in main program module 124, such as simulation software VERICUT, the volume of workpiece 20 and the volume of the material removed before and after calculating processing, numerical control machining simulation system can emulate the process of work pieces process.According to the volume of the workpiece 20 before and after the shape calculating processing of workpiece 20.In another embodiment, main program module 124 comprises the parameter relevant to the volume of the material removed, and such as, electrode shape, electrode material, workpiece material, those parameters can be stored in the memory of main program module 124 or upgrade energetically or measure.Main program module 124 calculates the volume of the material removed according to those parameters.
In one embodiment, after processing the first machined layer, operating means 11 is traveling electrode 16 to the second trigger point 19 rapidly, maybe moves to the first trigger point 18 when only having a trigger point.Galvano-cautery system of processing 1 enters tool setting pattern again.Be similar to the tool setting pattern before processing, loss correction module 126 is connected cooperation and carrys out control operation device 11 withdrawn electrode 16 rapidly with main program module 124 and programmable logic controller (PLC) 122, and the length of the complete first machined layer rear electrode 16 of calculating processing.Further, loss correction module 126 determines the loss value processing the first machined layer rear electrode 16.The difference of electrode 16 length before and after calculating processing first machined layer obtains loss value.The loss value of electrode 16 is the used up length of electrode 16 in processing.
The machining path 30 that main program module 124 splits each machined layer 22 is multiple processing sections 32, as shown in Figure 3, and according to processing sections 32, each machined layer 22 is divided into multiple processing block 24, as shown in Figure 4.In processing, electrode 16 moves the material removing processing block 24 along processing sections 32.Before processing second machined layer, main program module 124 determines the volume of each processing block 24 of the second machined layer.In one embodiment, in each machined layer, the volume of at least two processing blocks 24 is different, and the loss value of corresponding electrode 16 is also different with offset.Be similar to the method for the volume of the material that calculating first machined layer removes, main program module 124 calculates the volume of the processing block 24 of the second machined layer.In one embodiment, processing block 24 and volume thereof are determined by numerical control machining simulation system.
Computer Control Unit 12 is according to the loss of the volume compensation electrode 16 of the volume of the material removed, the loss value of electrode 16 and processing block 24.In one embodiment, the volume determination volumetric wear rate of the material that main program module 124 is removed according to the loss value of electrode 16 and described workpiece 20, namely removes the loss length of electrode 16 during the material of unit volume.The offset of compensating electrode 16 loss when main program module 124 is determined to process processing block 24 according to the volume of volumetric wear rate and processing block 24 further.Main program module 124 obtains should the loss value of electrode 16 of processing block 24 by the volume of be multiplied volumetric wear rate and processing block 24, and when determining to process this processing block 24 according to the loss value of this electrode 16, electrode 16 needs the value compensated.
In another embodiment, main program module 124 determines that the volume of processing block 24 accounts for the ratio of the volume of the material that workpiece 20 is removed, and namely in this implements, the volume of processing block 24 accounts for the ratio of the volume of the first machined layer material.The offset of compensating electrode loss when main program module 124 is determined to process this processing block 24 according to the loss value of this ratio and electrode 16 further.Main program module 124 obtains the loss value of the electrode 16 corresponding to processing block 24 by the ratio of the volume that is multiplied and the loss value that processes the first machined layer rear electrode 16, and when determining to process this processing block 24 according to this loss value, electrode 16 needs the value compensated.The accuracy of compensation can be improved by above-mentioned volume compensation method.
Main program module 124 is according to the position (x, y, z) of the processing end of offset correction electrode 16.In one embodiment, operating means 11 is traveling electrode 16 on the length direction of electrode 16, and main program module 124 is along the loss of the length direction compensating electrode 16 of electrode.In X-axis, Y-axis and Z axis one axially extends and moves electrode 16.Main program module 124 revises the coordinate value of position on this axle of the processing end of electrode 16.Such as, electrode extends along Z axis, and moves along Y-axis and Z axis, and workpiece 20 moves along X-axis, B axle, C axle, now according to the coordinate value of position on Z axis of the processing end of offset correction electrode 16.The revised position of processing end can be expressed as (x, y, z+ Δ z), and wherein Δ z is correction value.Now, the absolute value of Δ z equals the loss value of electrode 16.Main program module 124 coordinates programmable logic controller (PLC) 122 control operation device 11 according to revised position drive electrode 16, the loss of compensating electrode 16 like this.Correction coordinate value is only needed to complete compensation in this embodiment.
In another embodiment, electrode 16 favours linear axis and linearly axle and rotating shaft move, and the coordinate value of position in multiple reference axis of the processing end of electrode 16 like this need be revised according to offset.Such as, the position (x, y, z) of processing end is modified to (x ', y ', z ') according to offset.
In certain embodiments, galvano-cautery system of processing 1 every two or more machined layer can calculate the loss value of one-time electrode 16.The volume of material that galvano-cautery system of processing 1 is removed after calculating the processing of two or more machined layer, and according to the loss of the volume of loss value, removing materials and the volume compensation electrode 16 of processing block.Compensation method is herein similar to the compensation method that each machined layer foregoing calculates the loss value of one-time electrode 16.
Figure 5 shows that the flow chart of the galvano-cautery processing method 50 of an embodiment.Galvano-cautery processing method be used for galvano-cautery processing work formed expection shape.In 501, drive electrode is relative to workpiece motion s.Electrode can do three-dimensional movement relative to workpiece along multiple axle, and multiple axle comprises one or more linear axis and one or more rotating shaft.In one embodiment, electrode and workpiece both one of mobile, and another transfixion.In another embodiment, electrode and workpiece all move.In one or more axially traveling electrode and at one or more axially travelling workpiece.Such as, along Y-axis and Z axis traveling electrode, and along X-axis, B axle and C axle travelling workpiece, so remove three-dimensional machined layer.Electrode and/or workpiece can be driven by operating means.
In 503, voltage and electrolyte is provided to come between electrode and workpiece according to machining path machined layer machined layer ground processing work.When electrode is near workpiece, electrode end produces electric spark, and electric spark is transmitted by electrolyte, removes the material of workpiece.According to workpiece, machining path and machined layer estimate that the shape be processed into sets.At least one machined layer is three-dimensional machined layer, and this machined layer is not in one plane.In one embodiment, some machined layer are of similar shape.In another embodiment, some machined layer are not identical.
In 505, the volume of material that after determining to process one or more machined layer, workpiece is removed by electrode and the loss value of electrode.The volume of the material removed can be determined by numerical control machining simulation system.Numerical control machining simulation system can be used to determine machining path, machined layer etc.In one embodiment, the volume of the workpiece before and after the one or more machined layer of difference calculating processing.The volume of the material that workpiece is removed is the difference of workpiece volume before and after processing.In one embodiment, the length of electrode before and after the one or more machined layer of processing is obtained by the one or more trigger point of electrode contact.The loss value of electrode is the difference of electrode length before and after processing.In another embodiment, laser spots is as a reference point.When the processing end of electrode contacts with laser spots, the position that electrode is installed on the installation end of operating means is stored.According to the loss value of the position calculation electrode of electrode installation end before and after processing.In another embodiment, supersonic testing method or additive method can be used to the loss value obtaining electrode.In one embodiment, the loss value of one-time electrode is calculated after the processing of each machined layer.In another embodiment, often two or more machined layer calculate the loss value of one-time electrode after processing.
In 507, one or more machined layer are then divided into multiple processing block along machining path.Division processing path is multiple processing sections, and processes processing block along processing sections traveling electrode.In one embodiment, processing sections is straight line, and machining path is curve.The number of processing sections equals the number of processing block.Each machined layer of processing of a processing block processing block.Processing block can be determined by Numerical Control Machining Simulation.
In 509, determine the volume of processing block.In this embodiment, the volume of at least two processing blocks of a machined layer is not etc.The volume of processing block can be determined by Numerical Control Machining Simulation.
In 511, the loss of the volume compensation electrode of the volume of material, the loss value of electrode and the processing block that are removed according to workpiece.In one embodiment, according to the volume determination volumetric wear rate of the material that loss value and the workpiece of electrode are removed, and the offset of compensating electrode loss when determining to process processing block according to the volume of volumetric wear rate and processing block.The loss of offset compensating electrode is utilized in process.In another embodiment, determine that the volume of processing block accounts for the ratio of the volume of the material that workpiece is removed, and the offset of compensating electrode loss when determining to process processing block according to the loss value of ratio and electrode.The loss of offset compensating electrode is utilized in process.
In one embodiment, traveling electrode on the length direction of electrode, and the loss of compensating electrode along its length.In another embodiment, electrode incline in linear axis and linearly axle and rotating shaft moves, and the coordinate value of position on multiple axle of electrode machining end like this is correspondingly revised according to offset.
The action of method 50 illustrates with the form of functional module, and in the sequencing of the module shown in Fig. 5 and module, the division of action is not limited to illustrated embodiment.Such as, module can be carried out according to different orders; Action in a module with the combination of actions in another or multiple module, or can be split as multiple module.Such as, the action in module 505 is detachable calculates the volume of the material removed in two modules in one of them module, calculate the loss value of electrode in another module.In one embodiment, the volume of the material removed can calculate in the incipient stage of method 50.Action in module 507 and 509 also can perform in the incipient stage of method 50.The volume of the volume of removing materials, machining path, processing block and processing block can be determined and store before electrode machining workpiece.
Although describe the present invention in conjunction with specific embodiment, those skilled in the art will appreciate that and can make many amendments and modification to the present invention.Therefore, recognize, the intention of claims is to be encompassed in all such modifications in true spirit of the present invention and scope and modification.
Claims (20)
1. a galvano-cautery system of processing, is characterized in that, it comprises:
Electrode, is used for processing work;
Power supply, is used for encouraging described electrode and described workpiece to be contrary polarity;
Electrolyte supply device, is used to provide electrolyte between described electrode and described workpiece;
Operating means, is used for relative to electrode described in described workpiece movable; And
Control device, is used for:
Control described operating means to move described electrode according to the machining path that described control device sets and process described workpiece with carrying out a machined layer machined layer,
The volume of material that after determining to process one or more described machined layer, described workpiece is removed by described electrode and the loss value of described electrode,
Then one or more machined layer are divided into multiple processing block along described machining path,
Determine the volume of described processing block, and
The loss of electrode described in the volume compensation of the volume of material, the loss value of described electrode and the described processing block that are removed according to described workpiece.
2. galvano-cautery system of processing as claimed in claim 1, it is characterized in that: described control device is used for the volume determination volumetric wear rate of the material be removed according to loss value and the described workpiece of described electrode, and compensate the offset of described export license when determining to process described processing block according to the volume of described volumetric wear rate and described processing block.
3. galvano-cautery system of processing as claimed in claim 1, it is characterized in that: described control device is used for determining that the volume of described processing block accounts for the ratio of the volume of the material that described workpiece is removed, and compensate the offset of described export license when determining to process described processing block according to the loss value of described ratio and described electrode.
4. galvano-cautery system of processing as claimed in claim 1, is characterized in that: machined layer described at least one is three-dimensional machined layer.
5. galvano-cautery system of processing as claimed in claim 1, is characterized in that: described operating means is used for mobile described electrode on the length direction of described electrode, and described control device is used for compensating along the length direction of described electrode the loss of described electrode.
6. galvano-cautery system of processing as claimed in claim 1, is characterized in that: described operating means is used for axially moving described electrode one or more and axially move described workpiece one or more.
7. galvano-cautery system of processing as claimed in claim 1, is characterized in that: the volume of at least two described processing blocks of a described machined layer is not etc.
8. galvano-cautery system of processing as claimed in claim 1, it is characterized in that: described machining path is divided into multiple processing sections, the number of described processing sections equals the number of described processing block.
9. galvano-cautery system of processing as claimed in claim 8, it is characterized in that: described processing sections is straight line, and described machining path is curve.
10. galvano-cautery system of processing as claimed in claim 1, it is characterized in that: described control device is used for the volume of the described workpiece before and after respectively one or more machined layer described in calculating processing, and calculating the volume of the material that described workpiece is removed, it is the difference of described volume before and after processing.
11. 1 kinds of galvano-cautery processing methods, it is characterized in that, it comprises step:
Drive electrode is relative to workpiece motion s;
Voltage and electrolyte is provided to process described workpiece according to a machining path machined layer machined layer between described electrode and described workpiece;
The volume of material that after determining to process one or more described machined layer, described workpiece is removed by described electrode and the loss value of described electrode;
Then one or more machined layer are divided into multiple processing block along described machining path;
Determine the volume of described processing block; And
The loss of electrode described in the volume compensation of the volume of material, the loss value of described electrode and the described processing block that are removed according to described workpiece.
12. galvano-cautery processing methods as claimed in claim 11, is characterized in that: the step of the loss of the described electrode of described compensation comprises further:
According to the volume determination volumetric wear rate of the material that loss value and the described workpiece of described electrode are removed;
The offset of described export license is compensated when determining to process described processing block according to the volume of described volumetric wear rate and described processing block; And
Described offset is utilized to compensate the loss of described electrode in process.
13. galvano-cautery processing methods as claimed in claim 11, is characterized in that: the step of the loss of the described electrode of described compensation comprises further:
Determine that the volume of described processing block accounts for the ratio of the volume of the material that described workpiece is removed;
The offset of described export license is compensated when determining to process described processing block according to the loss value of described ratio and described electrode; And
Described offset is utilized to compensate the loss of described electrode in process.
14. galvano-cautery processing methods as claimed in claim 11, is characterized in that: machined layer described at least one is three-dimensional machined layer.
15. galvano-cautery processing methods as claimed in claim 11, it is characterized in that: described drive electrode to be included on the length direction of described electrode mobile described electrode relative to the step of workpiece motion s, and the step of the loss of the described electrode of the described compensation length direction comprised along described electrode compensates the loss of described electrode.
16. galvano-cautery processing methods as claimed in claim 11, is characterized in that: described drive electrode is included in relative to the step of workpiece motion s and one or morely axially moves described electrode and axially move described workpiece one or more.
17. galvano-cautery processing methods as claimed in claim 11, is characterized in that: the volume of at least two described processing blocks of a described machined layer is not etc.
18. galvano-cautery processing methods as claimed in claim 11, it is characterized in that: it is multiple processing sections that described galvano-cautery processing method comprises the described machining path of segmentation further, and moving described electrode to process described processing block along described processing sections, the number of described processing sections equals the number of described processing block
19. galvano-cautery processing methods as claimed in claim 18, it is characterized in that: described processing sections is straight line, and described machining path are curve.
20. galvano-cautery processing methods as claimed in claim 11, it is characterized in that: describedly determine the volume that the step of the volume of the material that described workpiece is removed by described electrode comprises the described workpiece before and after respectively one or more machined layer described in calculating processing, and calculating the volume of the material that described workpiece is removed, it is the difference of described volume before and after processing.
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