CN2391710Y

CN2391710Y - Electromagnetic tension revolving type electric spark wire-cutting apparatus used in machine tools

Info

Publication number: CN2391710Y
Application number: CN 99234064
Authority: CN
Inventors: 陈庆忠
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-14
Filing date: 1999-09-14
Publication date: 2000-08-16
Anticipated expiration: 2009-09-14

Abstract

The utility model relates to an electromagnetic tension revolving type electric spark wire-cutting apparatus used in machine tools, which belongs to a component of the machine tool. The apparatus is used for improving the existing high-speed and slow-speed wire cutting machines; the utility model can improve largely finish and precision of the high-speed wire cutting machine and improve further speed, precision and finish of the slow-speed wire cutting machine. The utility model is characterized in that the apparatus is provided with a component A and a component B which have completely same structures. The component A is connected with the component B by cutting electrodes; the apparatus is also provided with a pair of inner gear mechanisms for winding and shifting, and an accessory commutator.

Description

The lathe rotary wire electric discharge machining device of magnetic tension that powers on

The utility model belongs to the parts on the lathe.

At present, self-rotary spark cutting machine tool has been broken through traditional working method, with soon, the main distinction of silk cutting machine tool of being careful is that wire electrode not only does at a slow speed toward the complex line revolution motion, simultaneously also around self axial line with 1500-3000 rev/min of rotation at a high speed, and can adopt the transverse horizontal processing mode, thereby great variety has taken place in machine tool capability and processing mechanism, but the quick wire of existing lathe and the wire electric discharge machining device of wire at a slow speed have following shortcoming: 1. wire drive device is to adopt molybdenum filament or copper wire to do the cutting electrode silk fast, wire travelling speed is fast, about 8 meters of per seconds, cooling easily, cutting speed is fast, but precision and fineness are relatively poor, can reuse by to-and-fro thread, but wire electrode does not rotate, and the arcing phenomenon is arranged.2. wire drive device is to adopt copper wire to do the cutting electrode silk at a slow speed, wire travelling speed is slow, about 0.3 meter of per second, and cooling is difficult, cut workpiece speed is extremely slow, but precision and fineness are higher, can not to-and-fro thread, only walk towards a direction, with once promptly not using again, so the expense of silk is high, wire electrode itself can not rotate, and the arcing phenomenon is arranged.

The purpose of this utility model is to provide a kind of lathe rotary wire electric discharge machining device of magnetic tension that powers on, and it is used to transform the existing quick wire and the wire cutting machine tool of wire at a slow speed; It can make walks the silk cutting machine tool precision and fineness greatly improves fast, and the speed of walking silk cutting machine tool is at a slow speed greatly improved, and precision and fineness are improved more.

The purpose of this utility model is achieved through the following channels: feature is: it has the A parts and the B parts of identical structure, connects with cutting electrode silk 18 between A, the B; The A parts: cutting electrode silk 18 evenly divides multilayers on silk tube 5, and the one end is fixed on the silk tube 5, also by rotating screw mandrel frame and the two-way screw mandrel 6 dress silks on the silk tube 5; Silk tube 5 is contained on the bearing of main shaft 17, and an end of this main shaft 17 is equipped with gear drive 3, and its driving gear connects motor 1, and electromagnetism tension mechanism 2 is contained on the mount pad 10; Freewheel clutch 7 is contained on the silk tube 5; Internal gear 8 is fixed on main shaft 17 tops, and the pinion 9 that links with internal gear 8 is arranged, internal gear 12 and 5 clutches of silk tube, pinion 11 links with internal gear 12, pinion 13 is fixed on the two-way screw mandrel 14, this two-way screw mandrel 14 is in silk tube 5 sides, and is fixed on the screw mandrel frame 16, also has slide block 15 on two-way screw mandrel 14; Annex commutator 4 is made of the commutating circuit in the shell.

The utility model is compared with the device of existing self-rotary spark cutting machine tool, have three main advantages: 1. a pair of internal gear of employing mechanism realizes wrapping wire and speed change, and the self-rotary device is to adopt three pairs of big external gears to realize, thereby this device volume is little, in light weight, simple in structure.2。Owing to adopt the multilayer wrapping wire to make the silk that can load onto on the silk tube more than 1000 meters, thus the unidirectional wire time be 8 hours, can thoroughly eliminate the commutation striped; And self-rotary can only be around one deck silk on the silk tube, only adorn more than 100 meter silk, the unidirectional wire time has only 25-60 minute, so still have the commutation striped.3. adopt freewheel clutch when putting thread, the interference that makes the silk tube break away from other mechanism fully, only be subjected to electromagnetic force to make silk produce tension force, thereby put silk more steadily again can the reliable adjustment electromagnetic force, improved precision and fineness effectively, and self-rotary adopts incomplete clutch (click) to come clutch silk tube, thereby the silk tube is subjected to the other parts interference, the tension force of silk is provided by moment of inertia again, and the factor of moment of inertia is too many and be difficult to adjusting, is difficult to balance so put silk.

Now in conjunction with the accompanying drawings the utility model is described in further detail:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is an A modular construction schematic diagram of the present utility model;

Fig. 3 is that the utility model is contained in the work schematic diagram on the lathe, and wherein G is the workpiece that is cut;

Fig. 4 is the side view of mount pad 10 and the schematic diagram that electromagnetic force produces on it.

With reference to Fig. 1, Fig. 2, the utility model divides two joint A and B up and down.A and B structure are just the same, are loaded on the lathe relatively, and middle one section silk is used for the lathe cut workpiece.The workpiece that is cut is fixed on the work stage on the lathe, and this device is not move, and workbench is walked about to realize cutting.This device purpose be more than 1000 meters long cutting electrode silk 18 (molybdenum filament) equably branch multilayer ground on silk tube 5, molybdenum filament one end is fixed on the silk tube 5, because silk tube 5 is to connect by freewheel clutch 7 with other mechanism, thus can unidirectional idle running, can adorn silk by the gear in the rotation thread tins 5.Two joints rotate to same direction with unequal angular velocity up and down, one section molybdenum filament can be done the reciprocating motion of upper and lower straight line around self axis rotation again in the middle of making, and when rotatablely moving clockwise, the A joint is put silk, the B joint is received silk, and molybdenum filament is downward moving linearly in rotation; When inverse clock rotated, A joint was received silk, and the B joint is put silk, the molybdenum filament moving linearly that makes progress in rotation.At first, how does this device realize receiving silk? this device is that molybdenum filament both self was rotated at a high speed, upper and lower again reciprocating motion, so the device of Fig. 2 must wholely rotate at a high speed earlier, molybdenum filament just can be realized rotation like this, to make the slide block 15 on the two-way screw mandrel 14 poor in the time of rotation with silk tube 5 generation speed, this just can realize receiving silk, speed between slide block 15 and the silk tube 5 differs from two kinds and can both realize wrapping wire, silk tube 5 leading slide blocks 15, perhaps silk tube 5 hysteresis slide blocks 15, this device adopt the former realize receiving thread.Specify the silk process of receiving below: driving wheel internal tooth 8 is during by motor 1 driven rotary, slide block 15 two-way screw mandrel 14 run-in synchronisms drive pinion 9 and rotate, and other end pinion 11 and then rotates, drive internal gear 12 and rotate, internal gear 12 drives silk tube 5 by freewheel clutch 7 and rotates.Above procedural representation is as follows: internal gear 8 → pinion 9 → pinion 11 → internal gear 12 → silk tube 5, in the time of just realizing rotating at a high speed by this process, the leading slightly slide block 15 of silk tube 5 is received silk when realizing rotation.Now establishing internal gear 8 is 49 teeth, and internal gear 12 is 46 teeth, and pinion 9 is 16 teeth, and pinion 11 is 15 teeth.When internal gear 8 circles simultaneously, pinion 9 changeed for 49/16 weeks, and pinion 11 also changeed for 49/16 week simultaneously, and then internal gear 12 changeed for 46/15 ÷ 49/16=736/735 weeks, that is to say internal gear 12 than internal gear 8 fast (in advance) 1/735 week.This is the number of silk tube 5 leading slide blocks 15 when circling, if when changeing for 735 weeks, and silk tube 5 15 1 weeks of slide block in advance then, moving linearly (receiving a week) lentamente again when this has just realized that molybdenum filament rotates (735 change) at a high speed.Here be that Ren Juyi organizes data declaration once.Have again, how is layering evenly on the silk tube again for molybdenum filament? now be described as follows: the necessary layering of molybdenum filament is evenly on silk tube 5, otherwise more than 1000 meter molybdenum filament can't be store on so little silk tube 5, as Fig. 2, internal gear 12 is when driving silk tube 5, a tooth by internal gear 12 outers can drive pinion 13 rotations, pinion 13 rotates and drives two-way screw mandrel 14 rotations, slide block 15 on it also will move, have on the slide block 15 and draw a guide wheel and affect molybdenum filament to walk about, realized like this, molybdenum filament is evenly distributed on the silk tube 5, again because two-way screw mandrel 14 is for there being the screw mandrel of two-way silk, when that is to say two-way screw mandrel 14 towards a direction rotation, slide block 15 can back and forth be walked about on two-way screw mandrel 14, has realized the layering wrapping wire like this, improve the storage silk amount of silk tube greatly, loaded onto more than 1000 meter easily.This just makes the unidirectional wire (receive silk) can be up to 8 hours.Above procedural representation is as follows: the godet roller of internal gear 12 → pinion 13 → two-way screw mandrel 14 → slide block 15 → even wrapping wire.Can establish one group of data and specify this process: establishing pinion 13 is 18 teeth, molybdenum filament diameter 0.2mm, and screw mandrel pitch is 4mm, the tooth in internal gear 12 outers.So just as can be known, when internal gear 12 circled, silk tube 5 was received silk one circle, and pinion walked for 1/18 week, and slide block 15 moves 4/18 millimeter, is a bit larger tham 0.2 millimeter of molybdenum filament diameter, in order to avoid the heap silk so changes, just can realize the even laminating wrapping wire.Also have, how does silk tube 5 put silk? the end that can see internal gear 12 among Fig. 2 joins by freewheel clutch 7 and silk tube 5, when being in when putting thread attitude, one end of internal gear 12 breaks away from fully with silk tube 5, the rotatory force of silk tube 5 spurs by silk by receiving the silk end, by static when moving an angular speed W1 to, the F pulling force also from large to small, last only remaining air drag f resistance and faint frictional force f rub, after the pulling force of silk diminishes for F draw=f resistance+f rubs+f opens ↓, last f open fade to gradually very little extremely zero.If at this moment along with diminishing that f opens, do not strengthen a power gradually, make the tension force of silk keep balance.Si tension force instability then, machining state also will be unstable, and this power is exactly electromagnetic force f magnetic.At last, how does electromagnetism tension force produce? a visible mount pad 3 among Fig. 2, the schematic diagram that its side view and electromagnetic force produce as shown in Figure 4.When silk tube 5 rotation by the molybdenum filament band, hollow shaft also rotated synchronously, and on it, the magnetic line of force that permanent magnet produces is produced electric current by the coil cutting and reacts on hollow shaft, makes it produce electromagnetic resistance f magnetic.The f magnetic variation is big when silk tube 5 quickens, and F is drawn keep constant, and final F draws=f magnetic ↑+f resistance+f rubs, and wherein f magnetic is major part, the process of electromagnetism tension force generation that Here it is.In addition, electromagnetism tension force is adjustable, and its big I reflects from ammeter A, regulates PR and gets final product.With reference to Fig. 4, K is a change-over switch, and end has because electromagnetism tension force only need be put silk.With reference to Fig. 3, the course of action of each several part was as follows when the utility model installation bed was gone up work: lathe is made up of lathe bed, workbench, column etc., and this device A, B two joints are contained in the upper-lower position of lathe, and middle molybdenum filament passes workbench, and G is for being cut workpiece.Before the start, install on the B joint silk tube 5 with the wire-mounting device on the B right side molybdenum filament more than 1000 meters long, end passes stationary table to the silk tube 5 of A joint.Load onto the workpiece G that will cut on the workbench.After the start, A, B two joints rotate towards a direction simultaneously, and the B joint is put silk, and the A joint is just received silk, and molybdenum filament will move upward again around self axis rotation like this.Change conversely and then can move downward.In the time of after the start, be cut workpiece G band positive polarity electricity, molybdenum filament band negative polarity.Be cut workpiece G and walk about by default route, cut into required form by molybdenum filament by workbench.

Claims

1. a lathe rotary wire electric discharge machining device of magnetic tension that powers on is characterized in that:

It has the A parts and the B parts of identical structure, connects with cutting electrode silk [18] between A, the B;

The A parts: cutting electrode silk [18] evenly divides multilayer on silk tube [5], and the one end is fixed on the silk tube [5], also by rotating screw mandrel frame and two-way screw mandrel [6] the dress silk on the silk tube [5]; Silk tube [5] is contained on the bearing of main shaft [17], and an end of this main shaft [17] is equipped with gear drive [3], and its driving gear connects motor [1], and electromagnetism tension mechanism [2] is contained on the mount pad [10]; Freewheel clutch [7] is contained on the silk tube [5]; Internal gear [8] is fixed on main shaft [17] top, and have and pinion [9] that internal gear [8] links, internal gear [12] and [5] clutch of silk tube, pinion [11] links with internal gear [12], pinion [13] is fixed on the two-way screw mandrel [14], this two-way screw mandrel [14] is in silk tube [5] side, and is fixed on the screw mandrel frame [16], goes up at two-way screw mandrel [14] to also have slide block [15]; Annex commutator [4] is made of the commutating circuit in the shell.