CN201632731U

CN201632731U - Wire electrode moving mechanism of numerical control high-speed wiring electrical discharge machine

Info

Publication number: CN201632731U
Application number: CN2010201143230U
Authority: CN
Inventors: 袁大伟
Original assignee: Suzhou Jinma Machinery & Electronic Co Ltd
Current assignee: Suzhou Jinma Machinery & Electronic Co Ltd
Priority date: 2010-02-10
Filing date: 2010-02-10
Publication date: 2010-11-17
Anticipated expiration: 2020-02-10

Abstract

The utility model discloses a wire electrode moving mechanism of a numerical control high-speed wiring electrical discharge machine, which comprises thread rolling barrels with parallel shaft axis, an upper guide wheel, a lower guide wheel and a support component. A wire electrode is wound on the thread rolling barrel, the upper guide wheel and the lower guide wheel, and moves under the driving of the thread rolling barrel; the supporting component can move in the radial direction along the thread rolling barrel; and the thread rolling barrel is rotationally connected with the supporting component. The wire electrode moves under the driving of the thread rolling barrel, passes through the upper guide wheel and the lower guide wheel, and then is retracted on the thread rolling barrel; when the wire electrode is loose during the running process, the supporting component can move in the radial direction along the thread rolling barrel, and drives the thread rolling barrel to move to the direction away from the upper guide wheel and the lower guide wheel, so that the wire electrode is tightened again, and has constant tension; as the upper half components and the lower half components of the wire moving mechanism are equal, the wire electrode can keep the tension thereof constant in the processing region when in the forward movement and the backward movement of the wire electrode, thus improving the surface finish and size accuracy of the numerical control high-speed wiring electrical discharge machine.

Description

Numerical control electric spark is walked the wire electrode wire feeder of silk cutting machine tool fast

Technical field

The present invention relates to a kind of numerical control electric spark and walk silk cutting machine tool fast, particularly the wire feeder of the wire electrode on this lathe.

Background technology

With reference to accompanying drawing 1-2, it is a kind of Digit Control Machine Tool of processing by the mode of discharge by 1 pair of electric conductor 5 of reciprocating wire electrode that numerical control electric spark is walked silk cutting machine tool fast, in process, wire electrode is reciprocating, wire electrode leads to upper block 3 from the upper end of rolled thread tube 2, enter lower tumbler 4 again, and then arrive the other end of rolled thread tube.And when the rolled thread tube is just changeing an end that makes wire electrode move to the rolled thread tube, promptly, wire electrode is oppositely moved, when wire electrode moves to the other end of rolled thread tube by travel switch control counter-rotating, transfer forward to by travel switch control equally and move, the reciprocating motion of wire electrode is promptly so carried out.

Because wire electrode discharge, and wire electrode is subjected to self tension force effect in the process of wire, thereby wire electrode can relax, its length will prolong, directly influence the tensile force and the tensile strength of wire electrode, and, will directly influence the fineness and the machining accuracy of processing parts because wire electrode fluffs, tensile force diminishes.

In order to address this problem, those skilled in the art is primarily aimed at wire electrode and how keeps the method for permanent tension force to do research, accompanying drawing 3 has just reflected a kind of mechanism that solves the wire electrode relaxation problem, as can be seen from the figure, in the way of advancing of wire electrode 1, set up mainly by three godet rollers, slide block 8, the tension mechanism that fixed pulley 10 and balancing weight 20 constitute, a godet roller 9 is wherein arranged between two other godet roller 7, and this godet roller 9 is connected on the slide block 8, wire electrode 1 is walked around three godet rollers and by three's tensioning, be connected in pull rope between balancing weight 20 and the slide block 8 on fixed pulley 10, when wire electrode is lax in motion process, slide block 8 moves up under the traction of balancing weight 20, move thereby drive on the godet roller 9, so that lax wire electrode is strained again.But, as can be seen from Figure 2, the first half of whole wire feeder has been Duoed three godet rollers than Lower Half, need certain pulling force and drive the godet roller rotation, so the wire electrode forward move with reverse when mobile its wire electrode tension in machining area A section can change to some extent, specifically contrast in accompanying drawing 3, promptly wire electrode tension force when moving downward is big in machining area A section, and tension force is little when moving upward.The tension variation of wire electrode in machining area A section can cause that wire electrode locatees unstable on upper block 3 and lower tumbler 4, thereby influence machining accuracy and processing range, and, owing to increased by three godet rollers, make reciprocating wire electrode more be easy to generate fatigue damage, fracture of wire takes place, the stability and the crudy of influence processing.

The mechanism that also has another follow-on solution wire electrode relaxation problem at present, as shown in Figure 4, promptly on the basis of mechanism shown in Figure 3, increased and similar tension mechanism shown in Figure 3 in the bottom of wire feeder, the increase of this tension mechanism has solved the tension variation problem of machining area A section substantially, but owing to increased by three godet rollers again, more increased the weight of the degree of fatigue of wire electrode, so the easier generation fracture of wire of wire electrode phenomenon influences processing stability and quality.

Summary of the invention

The object of the invention is exactly the wire electrode wire feeder that will provide a kind of numerical control electric spark to walk silk cutting machine tool fast, and it can keep the permanent tension force of wire electrode in motion process.

Technical scheme of the present invention provides the wire electrode wire feeder that a kind of numerical control electric spark is walked silk cutting machine tool fast, it comprises rolled thread tube, upper block and lower tumbler that axial line parallels, wire electrode moves on rolled thread tube, upper block and lower tumbler and under the drive of rolled thread tube, this wire feeder comprises that also one can be along the support unit that moves radially of rolled thread tube, and the rolled thread tube is rotationally connected with this support unit.Wire electrode moves under the drive of rolled thread tube, through receiving on the rolled thread tube behind upper block and the lower tumbler, in when, in the wire electrode running relaxation taking place, support unit can moving radially along the rolled thread tube, driving the rolled thread tube moves to the direction away from upper block and lower tumbler, thereby, a constant tension force is arranged to guarantee wire electrode with wire electrode tensioning once more.

Further, have bearing block on the support unit, the rolled thread tube can rotate with bearing block by rotating shaft and be connected.Rotate relative to bearing block by rotating shaft, make the rolled thread tube to rotate, thereby support unit is both as the rotating support of rolled thread tube, simultaneously the driver part that moves as traction rolled thread tube again relative to support unit.The enforcement ratio of this structure is easier to, and function is also very reliable.

Preferably, support unit can be connected with a drawing part, and this drawing part provides an active force to support unit, makes support unit produce the trend that moves away from upper block and lower tumbler.Drawing part can be implemented by multiple mode, it preferably provides a constant active force to support unit, and it is fixed that the big I of active force is come according to the required tension force of wire electrode, make when wire electrode is lax, the rolled thread tube can in time move with support unit, thereby can guarantee further that wire electrode can keep a constant tension force all the time substantially in running.

Preferably, support unit preferably is arranged on the guide rail, moving along guide rail, thereby the moving direction of support unit and even rolled thread tube is limited.

The present invention compared with prior art, has following advantage: move the tensioning wire electrode by the rolled thread tube, make it keep permanent tension force, because the first half and the Lower Half parts equalization of wire feeder, thereby wire electrode also can keep its tension force at machining area constant when positive movement and counter motion, and owing to do not increase the godet roller wire electrode that leads, thereby can eliminate because of godet roller increases the wire electrode fatigue damage cause and cause the problem of fracture of wire, thereby can improve the surface smoothness and the dimensional accuracy of wire cutting machine tool processing.

Description of drawings

Accompanying drawing 1 is walked the structural representation of silk cutting machine tool fast for a kind of numerical control electric spark of the prior art;

Accompanying drawing 2 is the schematic top plan view of the wire electrode wire feeder part in the structure shown in Figure 1;

Accompanying drawing 3 is the structural representation that another numerical control electric spark of the prior art is walked silk cutting machine tool fast, and the wire electrode wire feeder shown in this figure in the structure improves to some extent with respect to the wire electrode wire feeder in the structure shown in Figure 1;

Accompanying drawing 4 is the structural representation that another numerical control electric spark of the prior art is walked silk cutting machine tool fast, and the wire electrode wire feeder shown in this figure in the structure further improves with respect to the wire electrode wire feeder in the structure shown in Figure 2;

Accompanying drawing 5 is for walking the structural representation of silk cutting machine tool fast according to a kind of numerical control electric spark of the invention process;

Wherein: 1, wire electrode; 2, rolled thread tube; 21, rotating shaft; 3, upper block; 4, lower tumbler; 5, electric conductor; 61, bearing block; 62, movable stand; 7, godet roller; 8, slide block; 9, movable pulley; 10, fixed pulley; 20, balancing weight; 30, guide rail.

The specific embodiment

Below in conjunction with accompanying drawing specific embodiments of the invention are described in detail.

Fig. 5 has reflected and has a kind ofly walked silk cutting machine tool fast according to numerical control electric spark of the invention process that in conjunction with Fig. 1-4 prior art that is reflected as can be seen, the structure of Fig. 5 reflection has mainly been carried out architecture advances in rolled thread tube 2 parts of wire feeder.

In the embodiment shown in fig. 5, wire feeder mainly is made of rolled thread tube 2, upper block 3, lower tumbler 4, support unit and wire electrode 1, wire electrode 1 is walked around rolled thread tube 2, upper block 3 and lower tumbler 4 respectively, wherein, around a lot of circles, these characteristics can be referring to prior art structure shown in Figure 2 on rolled thread tube 2 for wire electrode 1.Upper block 3 and lower tumbler 4 can adopt the usual parts that use in the art technology, its planform also can be referring to shown in Figure 2, upper block 3 and lower tumbler 4 all are more little at the edge past more medium position of thickness direction separately, depression angle from Fig. 2 reflection, or from a certain cross section of guide wheel, the edge of two guide wheels all forms the groove of V-arrangement.Rolled thread tube 2, upper block 3 and lower tumbler 4 threes' axial line parallels, and upper block 3 is in lower tumbler 4 upsides relatively.

The work that rolled thread tube 2 is born curled hair or put silk when rotating, in conjunction with embodiment shown in Figure 5, the actual wire route of wire electrode 1 can be described as: when rolled thread tube 2 moves in the direction of the clock, wire electrode 1 is emitted by the upper end of rolled thread tube 2, lead to the V-shaped groove on the upper block 3, enter the V-shaped groove on the lower tumbler 4 then, enter the lower end of rolled thread tube 2 again and batched; When rolled thread tube 2 cases were counterclockwise rotated, 1 lower end from rolled thread tube 2 of wire electrode emitted, and through arriving the upper end of rolled thread tube 2 behind V-shaped groove on the lower tumbler 4 and the V-shaped groove on the upper block 3, was batched by rolled thread tube 2 then.In fact, lathe for quick wire, wire electrode 1 will move reciprocatingly, and that is to say, in the motion process of wire electrode 1, when wire electrode arrives an end of rolled thread tube 2, by travel switch control rolled thread tube 2 backward rotation, wire electrode is oppositely moved, and when wire electrode 1 arrives the other end of rolled thread tube 2, by travel switch control oppositely, make wire electrode 1 equally according to such reciprocating motion.

In wire electrode 1 reciprocating process, can be to electric conductor 5 discharges to process, and in this process, wire electrode 1 is because elongated the fluffing of effect meeting of discharge and himself tension force, just need in wire feeder, increase the device of the rate of tension of control electrode silk 1 this moment, in the embodiment shown in fig. 5, be used for controlling the haulage gear that rolled thread tube 2 moves and be such device.

Referring to shown in Figure 5, support unit comprises movable stand 62 and bearing block 61, rolled thread tube 2 is connected with bearing block 61 by rotating shaft 21, this rotating shaft 21 and rolled thread tube 2 coaxial inner conductors, and this rotating shaft 21 can be rotated on bearing block 61, and bearing block 61 itself preferably adopts fixedly connected mode to combine with movable stand 62.Can apply a constant pulling force P (force direction shown in Figure 5 is towards a left side) to movable stand 62, the big I of pulling force P is set according to wire electrode 1 needed tension force own.Himself tensile force diminishes when electrode 1 is lax, at this moment, movable stand 62 just can be moved to the left under the effect of pulling force P, make rolled thread tube 2 move to left side shown in Figure 5 with bearing block 61, just move towards direction away from upper block 3 and lower tumbler 4, until electrode 1 tensioning again, make electrode 1 in whole process, remain substantially invariable tension force with this.

Below movable stand 62, preferably arrange guide rail 30, as shown in Figure 5, mobile guide rail 30 guiding that are subjected to of movable stand 62 can be avoided movable stand 62 off normals, cause bearing block 61 and rolled thread tube 2 to make the location of wire electrode 1 in the V-shaped groove of upper block 3 and lower tumbler 4 inaccurate thereupon off normal.

Movable stand 62 can move on guide rail 30 under the effect of pulling force P, stated as mentioned, pulling force P is preferably a constant active force, so that wire electrode 1 can be at any time when lax carry out slowly moving to the left side shown in Fig. 5, thereby guarantee that in theory wire electrode 1 has a constant tension force all the time at machining area.Pulling force P can provide by balancing weight, also can adopt servomotor or reversible electric machine to realize, these all belong to the knowledge that those skilled in the art are familiar with grasp, so no longer adopt accompanying drawing to do to explain in detail at this.

More than specific embodiment of the present invention is illustrated in conjunction with diagram; but protection content of the present invention is not only limited to above embodiment, in affiliated technical field of the present invention, and the common knowledge of a GPRS; just can in its technology main idea scope, carry out diversified change.

Claims

1. a numerical control electric spark is walked the wire electrode wire feeder of silk cutting machine tool fast, comprise rolled thread tube, upper block and lower tumbler that axial line parallels, wire electrode moves on rolled thread tube, upper block and lower tumbler and under the drive of rolled thread tube, it is characterized in that: this wire feeder comprises that also one can be along the support unit that moves radially of rolled thread tube, and described rolled thread tube is rotationally connected with this support unit.

2. wire electrode wire feeder according to claim 1 is characterized in that: have bearing block on the described support unit, described rolled thread tube rotates with bearing block by a rotating shaft and is connected.

3. wire electrode wire feeder according to claim 1 and 2 is characterized in that: described support unit is connected with a drawing part, and this drawing part provides an active force to support unit, makes support unit produce the trend that moves away from upper block and lower tumbler.

4. wire electrode wire feeder according to claim 1 and 2 is characterized in that: described support unit is arranged on the guide rail movably.