CN2403535Y

CN2403535Y - Taper wire-cutting and processing apparatus

Info

Publication number: CN2403535Y
Application number: CN 99234150
Authority: CN
Inventors: 鲁新中
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-28
Filing date: 1999-09-28
Publication date: 2000-11-01
Anticipated expiration: 2009-09-28

Abstract

The utility model discloses a novel taper wire-cutting and processing apparatus; on the basis of the existing double-arm rocking and swinging type processing apparatus, the utility model uses rocking and swinging which are separated; an upper and a lower wire frames are arranged on a movable swinging base which is hung on a machine tool body by a support base; the fulcrum of a rocking lever is connected with the movable swinging base by a hinge pin; the rocking U-shaft axis and the swinging V-shaft axis are orthogonal to a same plane and are positioned at a same plane with a wire electrode. The upper and the lower wire frames and the whole swinging part are independent from the rocking part; thus, the pitch of the upper wire frame can be changed; a telescopic arm has big telescopic ranges; accordingly, the utility model meets processing requirements of large thickness and large taper. Simultaneously, the rocking part realizes simulation movement according to the actual state of tangential point change of the wire electrode and a positioning circle of a wire guide wheel under the telescopic condition. Thus, the utility model meets drive requirements of fixing original points and having no error.

Description

A kind of novel tapering wire electric discharge machine

The utility model relates to the Wire-cut Electrical Discharge Machining technical field, particularly a kind of novel tapering wire electric discharge machine.The wire cutting machine tool that can be used for quick wire, jogging speed wire or speed wire, or other cutting equipments.

Existing fast or the fast tapering processing unit (plant) of wire at a slow speed two big classes are arranged: i.e. the swing tapering processing unit (plant) of single armed drag-cup type tapering processing unit (plant) and both arms.Its function is when workbench (workpiece) is done the displacement of (X, Y) diaxon coordinate according to processing request, and the additional displacement of two asessory shafts (U, V) is provided, and the line electrode silk is tilted by processing request, forms four-axle linkedly, realizes tapering cutting

Present single armed drag-cup type tapering processing unit (plant) comprises two kinds of so-called conelet and auger processing unit (plant)s.Its principle is the motion mode by similar (X, Y) axle workbench, at (U, V) two axis carriages of the anterior additional quadrature of last coil holder, does relative displacement with respect to following godet roller at (U, V) diaxon to realize godet roller, solves workpiece tapering processing problems.But this conelet processing unit (plant) also exists two shortcomings: the one, and when godet roller was done relative displacement on the same plane of U direction, the position, point of contact of line electrode silk and workpiece changed, thereby formed mismachining tolerance.Two be two godet rollers when the V direction forms the translation of space parallel antarafacial relatively, be prone to the problem that godet roller running phenomenon and position, point of contact that the line electrode silk contacts with godet roller V-type locating slot are difficult to determine.Under the condition of error permission, this conelet processing unit (plant) can only be processed ± about 3 ° for workpiece under the 100mm height.Godet roller tilts to do corresponding inclination with line electrode silk angle and big tapering processing unit (plant) makes up and down by connecting rod, improved the problem that last godet roller descends godet roller to exist relatively when the translation of V axle, also can process bigger tapering, but because the rigidity of leverage and have transmission (similar creeping) phenomenon that lags behind has certain influence to surface of the work machining accuracy and roughness.This in addition single armed drag-cup type tapering processing unit (plant) had so both occupied the processing district superjacent air space because the size of carriage device increases and increases greatly with angular range, influenced work-handling and processing observation, increased considerably manufacturing cost again.The U direction point of contact error that this device still exists also needs by the control system software compensation.

The swing tapering processing unit (plant) of present both arms, be to utilize U, the rotation of V diaxon to make line arm flexible (U axle) and coil holder rotation (V axle), the problem of having avoided the translation of single armed drag-cup type tapering processing unit (plant) V axle to exist, its point of contact changes the error that produces also can be by software compensation.But, be difficult to be designed to displacement, big tapering processing unit (plant) but have the swing tapering processing unit (plant) of both arms now, thereby can not process big thickness workpiece because its structure is limit; This processing unit (plant) is because of structure problem, and its beat is limited, is difficult to rotate bigger angle, realizes big tapering processing.Big when deflection angle in addition, thickness of workpiece is high, when displacement is big, easily exist the running problem, has further like this limited the machining angle scope, so this processing unit (plant) generally can only be processed below 12 ° the workpiece that 160mm thickness is following.

The point of contact error problem that the U axial displacement that above-mentioned two kinds of tapering processing unit (plant)s are existed exists, Chinese patent (CN2286438Y) disclosed " the rocking lever formula taper guide frame mechanism on the wire cutting machine tool " has solved this problem, but this mechanism does not solve the problem that the big tapering of the change span of existing apparatus exists.

The purpose of this utility model provides a kind of novel tapering wire electric discharge machine that can solve the existing existing problem of tapering processing unit (plant), makes shaking of U axle and V axle not limit by structure, can become span between the upper and lower coil holder.And the actual conditions that the point of contact changes when changing by means of " truly " simulation tapering machining angle carry out " simulating sports " and realize " error free motion ", thereby realize the processing request of big workpiece, big tapering.

For achieving the above object, the technical solution of the utility model is: on the swing tapering processing unit (plant) of existing both arms basis, realization is shaken and is swung separately, being about to upper and lower coil holder is installed on the moving swinging seat, moving swinging seat is suspended on the lathe bed by hold-down support, the fulcrum that shakes lever connects with moving swinging seat by hinge pin, it shakes the U axis and is orthogonal to same plane with swing V axis, and make the line electrode silk and shake the U axis and be in same plane, also be provided with the elevating mechanism that coil holder is moved on the moving swinging seat.

Because being independent of, upper and lower coil holder of the present utility model and swing part integral body thereof shakes part, and be suspended on the hold-down support, break the swing coil holder side of existing both arms and hung over the space constraint that forms on the coil holder vertical columns, enlarged hunting range, and go up coil holder can be in the scope of permission upper and lower displacement, make the expanding-contracting action expanded range of telescopic arm and interference-free, thereby can realize the processing request of big thickness, big tapering.Simultaneously, swing part is according to the roll off the production line virtual condition of point of contact variation of wire electrode and godet roller setting circle of flexible condition, realize analog simulation (shape) motion, make the line electrode silk on processing datum, form a fixing origin of coordinate, decide initial point, free from error transmission requirement thereby reach.

The utility model has the advantages that:

1, separates owing to carrying out to shake, enlarged the scope of shaking and swinging, make the angular range of head motion after improving the seal wire mode, generally can expand to 30 °-60 °, can expand to 90 ° in case of necessity with swinging.

2, owing to carry out to shake and separate, thereby realized the machining functions of variable span, solved that existing both arms pendulum-type tapering processing unit (plant) coil holder is restrainted and the problem that can not change span with swinging.

3, separate owing to carrying out to shake with swinging, realized the big tapering of the swing tapering processing unit (plant) of both arms, but the function of displacement has been abandoned single armed drag-cup type (big tapering, big thickness) tapering processing unit (plant) heaviness and huge carriage device, handled easily has reduced cost.

4, separate owing to carrying out to shake, improved transmission rigidity and transmission and machining accuracy with swinging.

5, separate owing to carrying out to shake with swinging, increased the containing space of internal structure and mechanism driving, realized point of contact emulation (shape) the simulation transmission of line electrode silk and godet roller setting circle, eliminated the mechanism driving error, the compensate function of the system that removes controls has simultaneously been avoided the error of calculation of compensation and the error that system interference causes.

6, separate owing to carrying out to shake with swinging, realized emulation (shape) simulation transmission, made the line electrode silk have one to determine and mechanical origin (zero point) accurately, when simplifying tapering control system for processing function (need not bore benefit) with respect to transmission system, improved machining accuracy, also convenient processing.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a structure principle chart of the present utility model;

Fig. 2 shakes another version of lever;

Fig. 3 is the A-A cutaway view of Fig. 2.

Dotted portion is the schematic diagram when shaking the lever motion angle among the figure, a kind of novel tapering wire electric discharge machine of describing in the accompanying drawing 1, comprise, following coil holder 1,2, moving swinging seat 3, shake lever 4 and can be last, following coil holder 1, do in 2 stretching motion on, following telescopic arm 5,6, on, down, flexible drive link 7,8, moving swinging seat 3 is suspended on the lathe bed by hold-down support 9, the fulcrum 10 that shakes lever 4 connects with moving swinging seat 3 by hinge pin, on, following telescopic arm 5,6 one ends are equipped with respectively, following godet roller 11,12, the other end by roller 13 respectively with shake lever 4 on, the lower end flexibly connects; Upper and lower flexible drive link 7,8 one ends are equipped with water spray plate 14, and the other end flexibly connects with the upper and lower end that shakes lever 4 respectively by roller 15, but wherein upper and lower flexible drive link 7,8 and upper and lower telescopic arm 5,6 synchronization telescopes; It shakes U axis 16 and is orthogonal to same plane with swing V axis 17, and make line electrode silk 18, with shake U axis 16 and be in same plane.By the suitable kind of drive (as gear mechanism, various worm-and-wheel gears and thread transmission etc.), make moving swinging seat 3 and superincumbent upper and lower coil holder 1,2 is installed, shake lever 4 grades together around 17 rotations of swing V axis, and form the motion of V axle; Shaking lever 4 is bearing in and shakes on the U axis 16, make and shake lever 4 forms the U axle around shaking 16 rotations of U axis motion to drive the identical kind of drive of V axle motion, shake simultaneously that lever 4

driving rolls

13,15 are stirred upper and lower telescopic arm 5,6 and upper and lower flexible drive link 7,8 is made stretching motion in upper and lower coil holder 1,2, by above structure as can be seen, shaking the U axle separates with the motion of swing V axle.Thereby for big tapering processing provides corresponding activity space, so realized the purpose of big tapering processing.

Be provided with the elevating mechanism that coil holder 1 is moved on the moving swinging seat 3, elevating mechanism is made of handwheel 19, screw mandrel 20, nut 21, support plate 22, the upper end of screw mandrel 20 is fixed with handwheel 19, and the lower end is passed the support plate 22 that is fixed on the moving swinging seat 3 and is threaded with nut 21 on being fixed on coil holder 1.Rotate handwheel 19, can make coil holder 1 along 23 upper and lower the moving of the locating slot on the moving swinging seat 3.Elevating mechanism can also be such as other transmission devices such as pinion and racks in addition, after last coil holder 1 is transferred to predetermined span, can compress by compressing mechanism such as screw, pressing plate (or voussoir) etc.When making elevating mechanism that coil holder 1 moves coil holder 1 moves on making, also drive and go up telescopic arm 5, upward flexible drive link 7,

roller

13,15, last godet roller 11 grades move together, to realize the purpose of change span.Can certainly be not if the elevating mechanism that last coil holder 1 moves be fixed upper and lower coil holder 1,2 spans.

Near the swing V of moving swinging seat 3 axis 17, be provided with support 24, support 24 links to each other with moving swinging seat 3, two godet rollers 25 are installed above it, support 24 and godet roller 25 can be with moving swinging seat 3 around 17 rotations of swing V axis, and line electrode silk 18 is derived respectively from the point of contact near swing V axis 17 by two godet rollers 25.Because the position, point of contact is very little from swing V axis 17 distances, during moving swinging seat 3 rotations, the thread guide mechanism and the tension mechanism displacement of line electrode silk 18 relative subsequent fixed are very little, can not cause line electrode silk 18 to deviate from the phenomenon of godet roller, thereby solved existing this type of tapering processing unit (plant) effectively, the running phenomenon that when big tapering is processed, may occur.

When the equal diameters of the diameter of roller 13 and upper and lower godet roller 11,12, shake the contact-making surface 26 of lever 4 and roller 13 and shake U axis 16 at grade, and parallel with the cut length of line electrode silk 18, then contact-making surface 26 contacts situation with the cut length that the situation that contacts of roller 13 has been simulated line electrode silk 18 truly with upper and lower godet roller 11,12.When contact-making surface 26 with shake U axis 16 at grade the time, shake lever 4 when shaking 16 rotations of U axis, the cut length of line electrode silk 18 equally can be around the point 27 fixed point rotations of swing V axis 17, so just avoided the point of contact of (or elimination) upper and lower godet roller 11,12 and line electrode silk 18 to change the error of line electrode silk 18 displacements that produce, thereby realized the purpose of mechanism's simulation emulation transmission with shaking the U axle.

During concrete the utilization, the diameter of roller 13 generally is not equal to the diameter of (usually less than) upper and lower godet roller 11,12, will select the suitable lever 4 that shakes like this, the radius P that makes roller 13 with contact-making surface 26 with shake U axis 16 equal the radius R of upper and lower godet roller 11,12 apart from the N sum, also can reach above-mentioned effect, and also in same moving swinging seat 3, provide bigger scope of activities like this, thereby can process bigger tapering for shaking lever 4.

Owing to shake the U axle around shaking 16 rotations of U axis, swing V axle is when 17 rotations of swing V axis, the cut length of line electrode silk 18 will be with the point 27 fixed point rotations that overlap, make the motion of the cut length of line electrode silk 18 that a point of determining be arranged, be mechanical origin, this is for be that datum level carries out various taperings and adds and bring great convenience man-hour (comprising the processing of abnormal shape and straight line formation enveloping surface) with swing V axis 17.

The described fork 3 that shakes of Fig. 2, Fig. 3 also can be made of backup plate 28 and pressing plate 29, both are superimposed together, and be bearing in and shake on the U axis 16, two rollers 13 are housed on the bearing pin 30 of roller 13 in addition, backup plate 28 is contacted with one of them respectively with pressing plate 29, make backup plate 28 and pressing plate 29 compress two rollers 13 respectively by backlash eliminating equipment 31 and eliminate roller 13 possibility gaps, and form inside and outside two with pure rolling (13 reverse rotations of two rollers) independently between shaft roller 13 and pressing plate 29 and the backup plate 28, to reach ensuring smooth transmission, eliminate the purpose that transmission lags behind.Backlash eliminating equipment 31 can be screw pretension or spring precompressed or the like.

Claims

1, a kind of novel tapering wire electric discharge machine, the upper and lower telescopic arm (5), (6), upper and lower flexible drive link (7), (8) that comprise upper and lower coil holder (1), (2), line electrode silk (18), shake lever (4) and in upper and lower coil holder (2), make stretching motion, upper and lower telescopic arm (5), (6) one ends are equipped with upper and lower godet roller (12), (13) respectively, and the other end flexibly connects with the upper and lower end that shakes lever (4) respectively by roller (13); Upper and lower flexible drive link (7), (8) one ends are equipped with water spray plate (14), the other end flexibly connects with the upper and lower end that shakes lever (4) respectively by roller (15), it is characterized in that also having a moving swinging seat (3), moving swinging seat (3) is suspended on the lathe bed by hold-down support (9), the described fulcrum (10) that shakes lever (4) connects with moving swinging seat (3) by hinge pin, it shakes U axis (16) and is orthogonal to same plane with swing V axis (17), and is in same plane with line electrode silk (18).

2, a kind of novel tapering wire electric discharge machine according to claim 1 is characterized in that described moving swinging seat (3) is provided with the elevating mechanism that coil holder (1) is moved.

3, a kind of novel tapering wire electric discharge machine according to claim 1 and 2, it is characterized in that near the swing V of described moving swinging seat (3) axis (17), being provided with support (24), support (24) links to each other with moving swinging seat (8), two godet rollers (25) are installed above it, and line electrode silk (18) is derived respectively from the point of contact of approaching swing V axis (17) by two godet rollers (25).

4, a kind of novel tapering wire electric discharge machine according to claim 1 and 2, it is characterized in that the described lever (4) that shakes is made of backup plate (28) and pressing plate (29), both are superimposed together, and be bearing in and shake on the U axis (16), on the bearing pin (30) on the roller (13), two rollers (13) are housed in addition, make backup plate (28) and pressing plate (29) compress two rollers (13) respectively by backlash eliminating equipment (31).

5, a kind of novel tapering wire electric discharge machine according to claim 3, it is characterized in that the described lever (4) that shakes is made of backup plate (28) and pressing plate (29), both are superimposed together, and be bearing in and shake on the U axis (16), on the bearing pin (30) on the roller (13), two rollers (13) are housed in addition, make backup plate (28) and pressing plate (29) compress two rollers (13) respectively by backlash eliminating equipment (31).