CN2341749Y

CN2341749Y - Taper wire-frame for spark linear cutting machine

Info

Publication number: CN2341749Y
Application number: CN 98241831
Authority: CN
Inventors: 张潮
Original assignee: BEIJING ELECTRICAL PROCESSING INST
Current assignee: BEIJING ELECTRICAL PROCESSING INST
Priority date: 1998-10-27
Filing date: 1998-10-27
Publication date: 1999-10-06
Anticipated expiration: 2008-10-27

Abstract

The utility model relates to a taper wire frame for a spark linear cutting machine. The cutting taper of the spark linear cutting machine can reach 90 DEG. The wire frame is provided with two axial motion devices U, V. The front sides and the back sides of an upper wire arm and a lower wire arm are provided with swivel heads, guide wheels, and setting wheels. Wire electrodes during working can always maintain the same plane with each sheave groove for solving the job-hopping phenomenon of the wire electrode. The wire frame does not need to a wire drawn mechanism for reducing the wire broken rate. The designs of the advanced swivel head, the guide wheel, telescopic swing links can cause working fluid to move with the wire electrode for realizing the purpose of the coaxial liquid spraying. The wire frame can thoroughly solve the existing problem that the spark linear cutting machine with quick wire travel has large cutting taper.

Description

The electric spark linear cutting machine taper guide frame

This utility model relates to the electric spark linear cutting machine technology.

At present, domestic quick wire electrical discharge machine tool taper guide frame has various ways, but can be divided into two big classes generally.According to development time be divided into two generation product.First generation taper guide frame: lower tumbler is motionless, and upper block can only move horizontally, and can not do yaw motion with the processing tapering.This coil holder only is suitable for 5 ° of processing with internal taper, and when processing big tapering, wire electrode and guided wheel slot can not remain in the plane, and angle is big more, and wire electrode is easy more to be jumped out from guided wheel slot.Therefore, this coil holder can not be processed big tapering.Second generation taper guide frame; The translation of upper block energy, deflection, lower tumbler can be with upper block translation and deflection.When cutting big tapering, guided wheel slot and wire electrode can remain in the plane, so wire electrode can not be jumped out from guided wheel slot.But since third wheel can not with the synchronous translation deflection of guide wheel, wheel-through groove and wire electrode be not in a plane, so wire electrode is jumped out from wheel-through groove equally easily.General by the distance that widens guide wheel and third wheel reducing the deflection angle that both ask, or middle with jewel restriction jumping thread.Though jewel hardness height works long hours and pulls out groove, easy fracture of wire.In the processing of 15 ° of awls, because of the upper block translation distance is bigger, cause quite numerous elongation of wire electrode and shortening, so adopt weight or heavily put the tension force of control electrode silk, in time put silk and receive silk.But easy fracture of wire when the commutation of silk.So second generation taper guide frame exists easy defective of jumping silk and fracture of wire when the tapering that cuts more than 15 °.

The purpose of this utility model is exactly a kind of novel electric spark linear cutting machine taper guide frame that provides at the problems referred to above.Use this coil holder can cut big tapering to 90 °, the elongation and the shortening that can not produce wire electrode take place thereby can avoid jumping silk in the translation synchronously of guide wheel and third wheel, deflection, without wire drawing mechanism, fundamentally solved the problem that quick wire electrical discharge machine tool cuts big tapering.

This utility model is achieved in that

As shown in drawings, this utility model comprises column 1 and crossbeam 2, is equipped with to realize the axially device of motion of UV two on the crossbeam above the column 12.The U axial-movement devices include the U slide 5 of a pair of line slideway 8 and mounted thereto stepper motor 3, reduction gearing 4, parts such as gap screw 6 and precision lead screw 7 disappear.The V axial-movement devices is a V slide 9 that is installed in U slide 5 front ends, and leading screw 11 and screw 12 are arranged on the V slide 9, and the lifting column 10 that the last silk of control arm 15 moves up and down is housed.Last silk arm 15 is connected in lifting column 10 bottoms, rotary head 13 and upper block 14 before last silk arm 15 front ends are provided with, and the rear end is provided with back rotary head 17 and back third wheel 18, and the front and back rotary head is connected by rotating shaft 16.Rotary head 21 and lower tumbler 22, back rotary head 25 and following third wheel 26 before following silk arm 23 is provided with equally, the front and back rotary head is connected by rotating shaft 24.Rotary head 17 connects with rotary head 25 behind the following arm by flexible fork 19 behind the last silk arm, two ends is provided with water pipe 20 at flexible fork about in the of 19, and following silk arm 23 is fixed on the column 1.On column 1, be provided with three directive wheels 27.

It is to realize going up two axially-movables of silk arm in horizontal plane that this utility model is set up the purpose of UV axial-movement devices.Be that the motion of UV axle drives upward silk arm motion, the guide wheel and the third wheel that are installed in each rotary head are done with moved further and deflection, wire electrode and four races can remain in the plane like this, thereby wire electrode can not produce job-hopping.Because last silk arm guide wheel and third wheel two directions simultaneously are equidistant mobile, so wire electrode can not extend and shorten, do not need to set up the wire electrode jack, removed this undesirable element of weight, reduced the opportunity of fracture of wire.Be located at water pipe on the flexible fork and can follow flexible fork and do swing all around, make the working solution of ejection follow wire electrode all the time, reach the purpose of coaxial hydrojet.Directive wheel on the column can be led the wire electrode of two directions up and down in a plane, and correct the arrangement is wrapped on the silk tube.

This utility model possesses following characteristics: the UV axle is located on the stand column and beam, and rigidity is strong, and slide adopts line slideway, precision height.The design of rotary head, guide wheel and the third wheel of silk arm can make four races remain in the same plane up and down, and silk can not job-hoped, and can not extend and shortening, has fundamentally established the ability that this coil holder can cut 0-90 ° of tapering.Working solution follows the tracks of guide wheel at any time and wire electrode moves deflection, reaches coaxial hydrojet function.

Accompanying drawing is this utility model schematic diagram.

Claims

1. spark cutting machine taper guide frame, look is drawn together column 1 and crossbeam 2, it is characterized in that on the crossbeam above the column 12, being equipped with the device of realizing that UV two axially moves, the U axial-movement devices include the U slide 5 of a pair of line slideway and mounted thereto stepper motor 3, reduction gearing 4, parts such as gap screw 6 and precision lead screw 7 disappear, the V axial-movement devices is a V slide 9 that is installed in U slide 5 front ends, leading screw 11 and screw 12 are arranged on the V slide 9, and the lifting column 10 that the last silk of control arm 15 moves up and down is housed; Last silk arm 15 is connected in lifting column 10 bottoms, rotary head 13 and upper block 14 before last silk arm 15 front ends are provided with, the rear end is provided with back rotary head 17 and back third wheel 18, the front and back rotary head is connected by rotating shaft 16, rotary head 21 and lower tumbler 22, back rotary head 25 and the 26 front and back rotary heads of following third wheel were connected by rotating shaft 24 before following silk arm 23 was provided with equally, and rotary head 17 connects with rotary head 25 behind the following arm by flexible fork 19 behind the last silk arm; Two ends be provided with water pipe 20 at flexible fork about in the of 19, following silk arm 23 is fixed on the column 1, is provided with three directive wheels 27 on column 1.

2. a spark cutting machine taper guide frame as claimed in claim 1 is characterized in that this coil holder cutting tapering can be 0-90 °.