CN109352103A

CN109352103A - One kind being used for the multiple cutting method of high speed to-and-fro thread feed electric spark wire cutting high current

Info

Publication number: CN109352103A
Application number: CN201811356059.9A
Authority: CN
Inventors: 邱明波; 邹尧; 刘志东; 邓聪
Original assignee: Jiangsu Nan Hang Lai Chuang Technology Co Ltd; Wuxi Research Institute Of Nanjing University Of Aeronautics & Astronautics
Current assignee: Jiangsu Nan Hang Lai Chuang Technology Co Ltd; Wuxi Research Institute Of Nanjing University Of Aeronautics & Astronautics
Priority date: 2018-11-14
Filing date: 2018-11-14
Publication date: 2019-02-19
Anticipated expiration: 2038-11-14
Also published as: CN109352103B

Abstract

The present invention discloses a kind of for the multiple cutting method of high speed to-and-fro thread feed electric spark wire cutting high current, cut using four times --- " cut one clear one and repair two ", shaped by first time high current high efficiency cutting, second of cutting carries out cutting --- the clear knife of zero trim amount or minimum trim amount using the wire travelling speed for cutting more than half for the first time and machining energy is greater than to workpiece, to reduce the remaining ablation product of interpolar and eliminate the deformation of workpiece, then third time is carried out using narrow spaces high peak current again and the 4th high speed cut is repaired and cut, further increase the machining accuracy and surface quality of workpiece, to reach high cutting efficiency, the purpose of high processing quality.

Description

One kind being used for the multiple cutting method of high speed to-and-fro thread feed electric spark wire cutting high current

Technical field

The present invention relates to a kind of wire electric discharge machine method, especially a kind of high speed to-and-fro thread feed electric spark wire cutting Processing method, it is specifically a kind of to be used for the multiple cutting method of high speed to-and-fro thread feed electric spark wire cutting high current.

Background technique

Repeatedly cutting is to improve the fundamental means of Wire-cut Electrical Discharge Machining precision and surface quality, by Roughing and fine machining Separately carry out, with it is main cut and repair cut two kinds of processing programs solve should fast, good contradiction again.Currently, to-and-fro thread electrical fire Yarn cutting mostly uses cutting (cut one and repair two) three times, is cut and formed generally by first time, and second of cutting improves processing Precision, third time cutting improve the surface quality of workpieces processing.

Conventional to-and-fro thread feed electric spark wire cutting is averaged processing electric current generally in 4-6A, and one time cutting efficiency exists steadily in the long term 100-150mm²/ min cuts (cut one and repair two) overall efficiency generally in 80-100mm three times²/min.In recent years, with high frequency intelligence The universal use of energy impulse power supply and composite cooling liquid, average cutting current have reached 10-15A, and primary cutting is most efficient Rate alreadys exceed 300mm²/ min, after high current high efficiency cutting carry out high speed repair cut be to-and-fro thread feed electric spark wire cutting improve The basic method of comprehensive cutting efficiency, but this method is not used widely, the main reason is that due to once cutting When energy increase considerably, after cutting the contour accuracy of workpiece, surface quality and interpolar state all have occurred essence variation, It is cut if carrying out small energy according still further to conventional multiple cutting method and repairing, the overall efficiency not only repeatedly cut, which is unable to get, to be mentioned Height, but also be difficult to achieve the purpose that repeatedly to cut to improve machining accuracy and surface quality.Therefore after high current high efficiency cutting Using it is novel repair blanking method carry out high speed repair cut be very it is necessary to.

Summary of the invention

The low, material for interpolar state difference, contour accuracy after high speed to-and-fro thread feed electric spark wire cutting high current high efficiency cutting Material deformation is big and influences subsequent the problem of repairing the cutting efficiency cut and processing quality, and the present invention provides one kind and back and forth walks for high speed The multiple cutting method of thread feed electric spark wire cutting high current, can be in high speed to-and-fro thread feed electric spark wire cutting high current high efficiency cutting Cutting efficiency and processing quality are improved afterwards.

To achieve the above object, the present invention adopts the following technical solutions:

One kind being used for the multiple cutting method of high speed to-and-fro thread feed electric spark wire cutting high current, is cut using four times --- " cut one clear one and repair two " is shaped by first time high current high efficiency cutting, and second of cutting, which uses, is greater than cutting one for the first time Half above wire travelling speed and machining energy carries out zero trim amount or cutting --- the clear knife of minimum trim amount δ to workpiece, to subtract Few remaining ablation product of interpolar and the deformation for eliminating workpiece, then third time and the 4th time are carried out using narrow spaces high peak current The high speed of cutting, which is repaired, cuts, and further increases the machining accuracy and surface quality of workpiece, to reach high cutting efficiency, high processing matter The purpose of amount.

Further, zero trim amount or minimum trim amount δ range of second of cutting are 0-0.02mm.

The utility model has the advantages that

1. the present invention solves high current by influencing to repair the main reason for cutting stability after analysis high current high efficiency cutting It is repaired after high efficiency cutting and cuts that efficiency is lower and the poor problem of processing quality, the measure taken is simple and easy, not only significantly mentions The high synthesis cutting efficiency of multiple cutting, also improves the machining accuracy and surface quality of workpiece after repeatedly cutting.

2. clear knife involved in the present invention, first can reduce or eliminate the deformation of workpiece generation after big energy efficient cutting, It repairs to cut for subsequent high speed and prepare；Second, the ablation in the first knife cutting surfaces electric discharge pit and in joint-cutting can be promoted to produce Object is further discharged, for subsequent small energy repair knife create a good environment, due to after big energy cuts in joint-cutting and Workpiece surface still remains more ablation product, in " clear knife " process, meeting between wire electrode and ablation product grain Disruptive discharge is generated, the promotion of discharge with explosion, the ablation being adsorbed in surface crater when scrubbing through working solution and clear knife Product can be spilled over and as interpolar working solution is discharged from joint-cutting together；Third has " leveling " to the surface of big energy cuts Effect, can be improved the contour accuracy of workpiece, and in cutting on line process, the generation for the pit that discharges is also along with cutting surfaces The generation of " convex peak ", the second knife use clear knife, master can be cut " convex peak " that surface leaves and " cut under the action of pulsed discharge It is flat ", macroscopical workpiece surface can be made more smooth, certain facilitation can be played to the raising of machining accuracy and surface quality.

Detailed description of the invention

Fig. 1 is multiple cutting processing route schematic diagram of the invention；

In figure: 1- first time cutting track；Second of cutting track of 2-；3- third time cutting track；4- the 4th time cutting Track；More cutting supporting surfaces of 5-.

Specific embodiment

Present invention will be further explained below with reference to the attached drawings and examples.

The present invention proposes one kind for the multiple cutting method of high speed to-and-fro thread feed electric spark wire cutting high current, using four times The mode of cutting is implemented, as shown in Figure 1.A wears a point for first time high current high efficiency cutting, and b is point of penetration, along a-b-c- D-e-f is counterclockwise processed.After the completion of cutting for the first time, processed clockwise along shown in second of cutting track 2, with Workpiece zero trim amount of progress or minimum trim amount δ are cut greater than the wire travelling speed and machining energy for cutting more than half for the first time It cuts, trim amount range is in 0-0.02mm, to promote the discharge of interpolar residual ablation product and reduce or eliminate big energy efficient to cut The deformation that rear workpiece generates is cut, subsequent small energy is repaired and cuts the progress for capableing of stability and high efficiency.Third time cutting is along third time It is counterclockwise processed shown in cutting track 3, the 4th cutting is processed clockwise along shown in the 4th cutting track 4, Third time and the 4th cutting are all made of the processing of narrow spaces peak value to improve the discharge frequency in the unit time, it is ensured that have enough Machining energy ablation workpiece material, make to repair cut during be not Caton phenomenon occur, thus further increase workpiece plus Work precision and surface quality.It finally uses and cuts identical energy processing repeatedly cutting supporting surface 5 for the first time.

Experiment shows to cut when cutting first time using the average current of 10A, and cutting (does not cut one to repair three times when clear knife Two) synthesis cutting efficiency about 100mm²/ min, Ra2.0 μm of workpiece surface roughness, workpiece surface striped is more；Four after clear knife Secondary cutting (cut one clear one and repair two) overall efficiency is up to 170mm²/ min, Ra1.5 μm of workpiece surface roughness, workpiece surface is basic Without striped.

Part that the present invention does not relate to is same as the prior art or can be realized by using the prior art.

Limiting the scope of the invention, those skilled in the art should understand that, in technical solution of the present invention On the basis of, the various modifications or variations that can be made by those skilled in the art with little creative work still of the invention Within protection scope.

Claims

1. one kind is used for the multiple cutting method of high speed to-and-fro thread feed electric spark wire cutting high current, it is characterised in that: pass through first The wire travelling speed and machining energy of more than half are cut in secondary high current high efficiency cutting forming, second of cutting using being greater than for the first time Zero trim amount or the cutting of minimum trim amount δ are carried out to workpiece, then third time and the 4th are carried out using narrow spaces high peak current The high speed of secondary cutting, which is repaired, cuts.

2. according to claim 1 be used for the multiple cutting method of high speed to-and-fro thread feed electric spark wire cutting high current, spy Sign is: zero trim amount or minimum trim amount δ range of second of cutting are 0-0.02mm.