CN216502842U

CN216502842U - Double-bearing wire cutting guide wheel

Info

Publication number: CN216502842U
Application number: CN202122953440.7U
Authority: CN
Inventors: 戴旺林
Original assignee: ANHUI JINZHAI JIANGJUN MAGNETIC INDUSTRY CO LTD
Current assignee: ANHUI JINZHAI JIANGJUN MAGNETIC INDUSTRY CO LTD
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-05-13
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses a double-bearing wire-electrode cutting guide wheel, which designs a special guide wheel shaft.A powder metallurgy bearing without oiling is additionally arranged on the shaft, and dustproof rings are additionally arranged on two surfaces of the bearing in a specific assembly form; forming a dust-proof and durable wire-electrode cutting guide wheel. The processing and assembling method is simple, practical, low in cost and long in service life. The assembly time of the guide wheel is 10 minutes, and the service life of the guide wheel is 2-3 times that of a common wire cutting guide wheel. The wire cutting machine tool is suitable for processing metal materials with more dust, such as magnetic material dies, and the like, and can also be widely used for various wire cutting machine tools with worse working environments.

Description

Double-bearing wire cutting guide wheel

Technical Field

The utility model relates to a core part of a wire cutting machine tool for electric spark machining, in particular to a double-bearing wire cutting guide wheel.

Background

In the process of processing a permanent magnetic ferrite mould or other mechanical processing, a plurality of working procedures need to be applied to a linear cutting machine, and the working principle of the linear cutting machine is as follows: the moving metal wire is used as a tool electrode, pulse current is conducted between the metal wire and the workpiece, and the workpiece is cut by the corrosion action of pulse discharge. Because it uses wire electrode, it can only do contour cutting process. The discharge machining composition is as follows: 1- -numerical control device; 2-wire storage; 3- -guide wheel; 4-electrode wire; 5- -the workpiece; 6- -nozzle.

Because the wire cutting processing environment contains metal powder; the working fluid has great influence on the guide wheel, and the rotating speed of the guide wheel is higher, so that after the guide wheel is used for a period of time, a guide wheel bearing is damaged, the guide wheel is damaged by the bearing, and the guide wheel jumps, so that the wire cutting machining precision is influenced. This results in frequent replacement of the guide wheels or guide wheel bearings. This affects both the processing cost and the processing efficiency.

The existing guide wheel device consists of a guide wheel, a bearing outer sleeve and a locking nut. As shown in the second figure, the guide wheel is integrated with the guide wheel shaft, the bearings are arranged at two ends, although waterproof covers are arranged on two surfaces of the bearings, the waterproof covers deform under the corrosion action of the saponification cooling liquid after working for a period of time, the bearings can slowly seep sewage, and the bearings can be damaged due to the fact that the sewage contains metal powder.

SUMMERY OF THE UTILITY MODEL

The utility model aims to make up for the defects of the prior art and provides a double-bearing wire-electrode cutting guide wheel which is simple and quick to assemble, can prolong the service life, reduce the wire-electrode cutting processing cost, shorten the shutdown maintenance time and improve the use efficiency.

The utility model is realized by the following technical scheme:

the utility model provides a dual bearing wire-electrode cutting guide pulley, is equipped with the inner chamber including the guide pulley base member at guide pulley base member middle part, runs through in the inner chamber and has run through the guide pulley axle, all installs ball bearing, bearing coat and lock nut at the both ends of guide pulley axle, lies in guide pulley base member inner chamber internally mounted on the guide pulley axle and has powder metallurgy oil bearing inner chamber inner wall both ends that lie in powder metallurgy oil bearing be equipped with the retainer ring groove respectively, install the hole retaining ring at the retainer ring inslot, still install the dust ring respectively at the both ends that lie in powder metallurgy oil bearing in the inner chamber, the dust ring be located the hole retaining ring outside.

And a shaft shoulder fixedly connected with the powder metallurgy oil-retaining bearing is arranged on the guide wheel shaft.

The utility model has the advantages that:

1. the guide wheel shaft is provided with a shaft shoulder for axially fixing the powder metallurgy bearing, and the inner cavity of the guide wheel is additionally provided with 2 retainer rings which can fix the axial movement of the powder metallurgy bearing. The shaft is additionally provided with an oil-containing powder metallurgy bearing which does not need to be oiled, and dust rings are additionally arranged on two surfaces of the bearing in the inner cavity of the guide wheel matrix in a specific assembly form; forming a dust-proof and durable wire-cutting guide wheel device; the service life is improved from 3000 hours of the original 2000-cost to 7000 hours of the original 6000-cost.

2. The middle of the guide wheel shaft is provided with a powder oil-containing bearing; two ends of the guide wheel are respectively provided with a guide wheel ball bearing and a bearing outer sleeve; when the ball bearings at the two ends of the guide wheel device rotate, the powder metallurgy bearing can also rotate, and when the ball bearings at the two ends are damaged and cannot rotate, the middle powder metallurgy bearing can rotate, and the powder metallurgy bearing continues to work without being stopped and replaced, so that the time is saved. The service life is prolonged, and the cost is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view of the structure of the guide wheel base.

Fig. 3 is a schematic view of the structure of the idler shaft.

Fig. 4 is a schematic structural diagram of a powder metallurgy oil-retaining bearing.

Detailed Description

As shown in fig. 1, a double-bearing wire-electrode cutting guide wheel comprises a guide wheel base body 1, an inner cavity 2 is arranged in the middle of the guide wheel base body 1, a guide wheel shaft 3 penetrates through the inner cavity 2, ball bearings 4, bearing sleeves 5 and locking nuts 6 are arranged at two ends of the guide wheel shaft 3, powder metallurgy oil-containing bearings 7 are arranged in the inner cavity 2 of the guide wheel base body 1 on the guide wheel shaft 3, retainer ring grooves are respectively arranged at two ends, located at the powder metallurgy oil-containing bearings 7, of the inner wall of the inner cavity 2, retainer rings 8 for holes are arranged in the retainer ring grooves, dust rings 9 are respectively arranged at two ends, located at the powder metallurgy oil-containing bearings 7, of the inner cavity, and the dust rings 9 are located outside the retainer rings 8 for holes.

And a shaft shoulder 10 fixedly connected with the powder metallurgy oil-retaining bearing 7 is arranged on the guide wheel shaft 3.

The utility model is provided with two bearings, the guide wheel base body 1 and the guide wheel shaft 3 are designed independently, the middle bearing is a wear-resistant powder metallurgy oil-retaining bearing 7 which does not need to be oiled, and the bearings are provided with positioning devices in the axial direction and dustproof devices, so that dust and wire cutting liquid can be prevented from entering the powder metallurgy bearing. Ball bearings are arranged at two ends.

As shown in figure 2, the guide wheel base body 1 is a newly designed guide wheel base body, and is separated from a guide wheel shaft 3, a retainer ring groove is designed in the inner cavity of the guide wheel base body 1 and is used for assembling a hole, a retainer ring 8 is used for axial positioning of a powder metallurgy bearing, and dustproof ring grooves are formed in the two ends of the inner cavity and are used for assembling dustproof rings 9, so that dust and wire cutting liquid can be prevented from entering the powder metallurgy bearing.

As shown in fig. 3, the guide wheel shaft 3 is a novel guide wheel shaft, a shaft shoulder 10 is designed on the shaft for fixing one end of the powder metallurgy bearing, and the guide wheel shaft is designed independently, so that compared with the original guide wheel combination, the guide wheel shaft is low in cost and can be reused.

As shown in figure 4, the powder metallurgy oil-retaining bearing 7 with high wear resistance and without oil filling is assembled in a novel guide wheel base body inner cavity 2, the axial direction is fixed by a guide wheel shaft shoulder 10 and a hole retaining ring 8, and an inner hole of the bearing is matched with a guide wheel shaft. When the ball bearings at the two ends of the guide wheel device rotate, the powder metallurgy bearing can also rotate, when the ball bearings at the two ends are damaged and can not rotate, the middle powder metallurgy bearing can rotate, the powder metallurgy bearing does not need to be replaced after being stopped, the powder metallurgy bearing continues to work, and the time is saved. The service life is prolonged, and the cost is reduced.

Claims

1. The utility model provides a dual bearing wire-electrode cutting guide pulley, is equipped with the inner chamber including the guide pulley base member at guide pulley base member middle part, runs through in the inner chamber and has the guide pulley axle, all installs ball bearing, bearing overcoat and lock nut, its characterized in that at the both ends of guide pulley axle: the guide wheel is characterized in that a powder metallurgy oil-retaining bearing is arranged in an inner cavity of a guide wheel base on a guide wheel shaft, two ends, located on the powder metallurgy oil-retaining bearing, of an inner cavity inner wall are respectively provided with a retainer ring groove, a hole retainer ring is arranged in the retainer ring groove, two ends, located on the powder metallurgy oil-retaining bearing, of the inner cavity are respectively provided with a dust ring, and the dust ring is located on the outer side of the hole retainer ring.

2. A double-bearing wire-cut guide wheel as defined in claim 1, wherein: and a shaft shoulder fixedly connected with the powder metallurgy oil-retaining bearing is arranged on the guide wheel shaft.