CN202073911U

CN202073911U - Guide wheel with rubber jacket for producing micro-fine bonding wire

Info

Publication number: CN202073911U
Application number: CN2011200269274U
Authority: CN
Inventors: 陈彪; 高亮; 闫茹
Original assignee: BEIJING DOUBLINK SOLDERS Co Ltd
Current assignee: BEIJING DOUBLINK SOLDERS Co Ltd
Priority date: 2011-01-27
Filing date: 2011-01-27
Publication date: 2011-12-14
Anticipated expiration: 2021-01-27

Abstract

The utility model discloses a guide wheel with a rubber jacket for producing a micro-fine bonding wire; the guide wheel is characterized in that as a ring of the rubber jacket are sheathed on the traditional plastic guide wheel, are made of silica gel material, are soft in texture and have large elasticity, the guide wheel with the rubber jacket causes less damage to the surface of the bonding wire compared with the traditional plastic guide wheel with high hardness; and the rubber jacket is provided with a groove which is a U-shaped groove so thatdamage caused because the bonding wire is rubbed with the side wall of the guide wheel is reduced. Meanwhile, after the guide wheel is subjected to abrasion for a long period, only the rubber jacket needs to be replaced regularly, therefore, the expensive plastic guide wheel can be recycled, and the manufacturing cost is saved. The guide wheel provided by the utility model has a simple and reasonable structure, is easy to implement and is an innovation for the traditional plastic guide wheel of a drawing wire for producing the bonding wire. The requirement for the surface finish quality of the bonding wire is realized in a simple and rapid manner; and a reliable condition is supplied to the quality optimization of bonding wire products.

Description

A kind of fine bonding wire production is with being with the gum cover guide wheel

Technical field

The utility model relates to a kind of guide wheel, refers to a kind of guide wheel of fine bonding wire production usefulness especially.

Background technique

In potting material bonding wire production process, guide wheel is indispensable medium, plays the effect of guiding and stable tension force, also is the key factor that influences the bonding wire surface finishment simultaneously.The fine drawbench of using in the bonding wire production, annealing machine and rewind machine are provided with one to five guide wheel in take-up and unwrapping wire place, like this, in all multipaths that fine bonding wire is produced, silk just inevitably with guide wheel repeatedly " intimately " contact, so the material of guide wheel, groove shapes and surface roughness all can influence the surface quality of bonding wire.

Existing bonding wire production usefulness be the plastics guide wheels, because of its higher hardness is rubbed wound silk surface easily, cause the surface that asterism is arranged, and the guide wheel groove is near triangular shape, it is too tight that the bottom transition does not cause silk to contact with guide wheel gently, the silk surface is easy to just be rubbed wound, scratches, cause that product rejection is many, productivity descends, and the bonding wire of undesirable appearance can produce very big influence to the encapsulation process of subsequent clients, such as stifled chopper, cause path to pollute and wire has some setbacks, the high harm of outage, even can influence the electrical property and the reliability of electronic parts and components.

The model utility content

In view of this, the utility model is improved above-mentioned shortcoming, on the conventional plastic guide wheel, overlapped a circle gum cover, and the gum cover groove is made the U type, so, the mild U type groove of bottom transition to the silk surface to rub wound more much smaller to the acuteness injury of silk than original triangular shape groove, silk reduces with the collision of guide wheel sidewall, can not produce silk and tightly rub the situation that the guide wheel sidewall runs, add that the gum cover that touches with wire connection adopts the silica gel material, its speciality is a good springiness, the softness height, hardness is low, and is much smaller to the plastics guide wheel that the injury on silk surface is higher than conventional hardness, thereby improved product surface grade and productivity.

In addition, the conventional plastic guide wheel constantly contacts with silk in process of production, silk is when being worn, and plastics guide pulley surface roughness also increases gradually, rubbing wound and can grow in intensity and do not satisfy the production needs silk, such guide wheel will consume with a period of time, if cover one circle gum cover then only needs the periodic replacement cushion rubber on the plastics guide wheel, the gum cover preparation process is simple, cost of production is more much smaller than plastics guide wheel, thereby has saved cost of production greatly.

Description of drawings

Fig. 1 is a bonding wire drawing production schematic representation

Fig. 2 is a conventional plastic Guiding wheel structure plan view

Fig. 3 is the side view of Fig. 2

Fig. 4 is the utility model Guiding wheel structure plan view

Fig. 5 is the side view of Fig. 4

Embodiment

Below in conjunction with accompanying drawing this model utility is described further:

Be that example explanation silk in the bonding wire production process contacts with the frequent of guide wheel at first with the fine wire drawing in the production process, as shown in Figure 1, bonding wire 1 gets off from paying out reel 2, bonding wire 2 is through the groove of guide wheel 3, after the guide wheel guiding, enter into wire drawing machine inlet wire hole 4, silk is penetrated matching die, after carrying out drawing cold working, silk extracts from drawbench wire outlet hole 5 again and leads then around to take-up axle 6 through guide wheel 3, in this drawing process, silk produces with two guide wheels and contacts, and in subsequent annealing and winding process, thread with the touch opportunity of guide wheel can be more.

Conventional plastic Guiding wheel structure plan view and side view are respectively as shown in Figures 2 and 3, center hole is a bearing 7, bearing 7 makes guide wheel rotate in running, guide wheel adopts plastic material, and quality is hard partially, scratches silk easily, and conventional plastic guide wheel groove 8 is a triangle, silk is rubbing plastics guide wheel sidewall 9 easily in running, just no matter from guide wheel material or groove shapes, para-linkage silk surface all can have a negative impact.

Improved Guiding wheel structure plan view of the utility model and side view are respectively as shown in Figure 4 and Figure 5, center hole is still bearing 7, different is to have overlapped a circle gum cover 11 on the conventional plastic guide wheel, gum cover is the silica gel material, the quality softness, para-linkage silk silk superficial injury is little, and gum cover 11 has groove 12, and groove 12 is a U type groove, has reduced bonding wire and has rubbed wound with contacting of gum cover sidewall 10, improved product surface quality greatly, simultaneously after wearing and tearing after a while, only need the cheap gum cover 11 of periodic replacement, and need not as before need to regularly replace the plastics guide wheel of costliness, therefore expensive plastics guide wheel can recycle, and has saved manufacture cost greatly.

The utility model apparatus structure advantages of simple, easy to implement, be the production of para-linkage silk with the innovation of wire drawing conventional plastic guide wheel, adopt simple mode fast to realize the requirement of para-linkage silk surface finishment, for the quality optimization of bonding wire product provides reliable condition.

Claims

1. a fine bonding wire production is characterized in that: comprise the plastics guide wheel, overlapped one and enclose gum cover on the plastics guide wheel that center hole is a bearing with band gum cover guide wheel.

2. a kind of fine bonding wire production according to claim 1 is with being with the gum cover guide wheel, and it is characterized in that: gum cover has groove, and groove is a U type groove.

3. a kind of fine bonding wire production according to claim 1 and 2 is with being with the gum cover guide wheel, and it is characterized in that: gum cover is the silica gel material.