CN201308948Y

CN201308948Y - Transition processing die of flat copper pipe for electromagnetic wire

Info

Publication number: CN201308948Y
Application number: CNU2008201570500U
Authority: CN
Inventors: 徐勇; 张家平
Original assignee: SHANGHAI FLYING WHEEL INDUSTRIAL Co Ltd; SHANGHAI FEILUN NON FERROUS NEW MATERIAL CO Ltd
Current assignee: SHANGHAI FLYING WHEEL INDUSTRIAL Co Ltd; SHANGHAI FEILUN NON FERROUS NEW MATERIAL CO Ltd
Priority date: 2008-12-12
Filing date: 2008-12-12
Publication date: 2009-09-16
Anticipated expiration: 2018-12-12

Abstract

The utility model discloses a transition processing die of flat copper pipe for electromagnetic wire, comprising a circular plate outer die detachably provided with a die core, wherein the middle part of the die core is provided with a stretch channel penetrating through the middle part; the section of the stretch channel is ellipse. When the die core is a finished die core, the section of the stretch channel is rectangle with high length-to-width ratio. Via the processing technique of segmental stretch that stretches pipe into circular, ellipse, transition flat ellipse and flat pipe, the transition processing die can resolve the defect such as that the prior flat finished pipe has groove at middle. The transition processing die has the advantages of high production efficiency and smooth and flat surface, while the product is suitable for the electromagnetic coil of special motor.

Description

The transition processing mold that is used for the flat copper pipe of electromagnetic wire

Technical field

The utility model relates to the copper processing technique field, relates in particular to a kind of transition processing mold that is used for the flat copper pipe of electromagnetic wire.

Background technology

Need a kind of flat copper pipe that is used as solenoid in the motor manufacturing technology field.As shown in Figure 1, the long limit of this flat copper pipe is A0, and minor face is B0, and wall thickness is S0, and the profile corner is R0.Big, the narrow limit of the length and width ratio of this flat copper pipe is especially little.The manufacturing demand of the flat copper pipe of this structure has been brought challenge to the process technology of naked copper pipe.

Processing mode at present commonly used is: at first the copper pipe base is stretched as the copper coin pipe of setting size, the roll that adopts the mini zone pass then is the former pipe of this copper rolling and forming progressively, finally forms the especially little flat copper pipe in big, the narrow limit of this length and width ratio.

But this processing method can form groove in the middle of production tube, cause the conductor cross-section distortion, and the endoporus film-cooled heat reduces, and forms the gap when twining insulating materials, causes the unit vibrating noise big, shortens unit service life.And, the surface quality and all non-constant of dimensional accuracy of the production tube that this processing method obtains, and can not produce the flat copper pipe of big length, so production efficiency is very low.

In addition, a kind of stretcher strain processing method is arranged also in the prior art, but the product that this method obtains forms groove at broadside easily because length-width ratio is big, influences the serviceability of flat copper pipe finished product, therefore also can't satisfy the needs of flat copper pipe on using.

Therefore, those skilled in the art is devoted to develop the processing mold that a kind of energy acquisition has the flat copper pipe of excellent surface quality and dimensional accuracy.

The utility model content

Because the above-mentioned defective of prior art, technical problem to be solved in the utility model provides a kind of transition processing mold with flat copper pipe of excellent surface quality and dimensional accuracy.

For achieving the above object, the utility model provides a kind of transition processing mold of flat copper pipe, comprises the disc external mold, detachably is provided with core rod in the described external mold; The middle part of described core rod offers a drawing passageway that connects; The cross section of described drawing passageway is oval.

In embodiment of the present utility model, when described core rod was the finished product core rod, the cross section of described drawing passageway was the rectangle of aspect ratio.

Transition processing mold of the present utility model makes pipe remain slyness in the intermediate deformation process because the said structure design has alleviated the radial pressure that flat tube flattens by utilizing oval transition mould, can not produce intermediate groove because of radial pressure is excessive.In the specific implementation,, realized finished product production efficiency height, the bright and clean smooth technique effect of product surface, be highly suitable for the solenoid of special machines by the processing technology of the flat ellipse of circle-ellipse-transition shape-flat tube step drawing.

Be described further below with reference to the technique effect of accompanying drawing, to understand the purpose of this utility model, feature and effect fully design of the present utility model, concrete structure and generation.

Description of drawings

Fig. 1 is the finished product cross-sectional structure schematic diagram that the utility model one specific embodiment makes;

Fig. 2 is the structural representation of external mold in the utility model one specific embodiment;

Fig. 3 is the cross-sectional structure schematic diagram of external mold among Fig. 2;

Fig. 4 is the structural representation of finished product external mold in the utility model one specific embodiment;

Fig. 5 is the cross-sectional structure schematic diagram of external mold among Fig. 4.

The specific embodiment

In the copper processing technique field, when generally being deformed into the rectangle copper pipe by circular pipe, the girth of pipe is greater than the girth of copper pipe finished product, and ratio is approximately 1.02-1.05 doubly.

Obtaining 16mm * 4mm * 1.2mm flat copper pipe with processing is example, will select the circular pipe about diameter 12.7mm.Therefore but this diameter value 12.7mm is 3.18 with the length ratio of finished product bond length 4mm, and ratio is very big, and ultimate deformation is excessive in process, can cause in the middle of the broadside stressed excessive and form intermediate recess.

The key of transition processing mold of the present utility model is the shape and size design of drawing passageway cross section.

In one embodiment, circular pipe diameter is 13.25mm.As Fig. 2, shown in Figure 3, removably be provided with core rod 20 in the disc external mold 10.External mold 10 adopts the carbide alloy YG 8 material, and modular angle is 14 degree, and the mould sizing is h2.

In other embodiments, the modular angle of external mold can be chosen between the 12-15 degree.

The long limit A2 of the flat ellipse of transition shape of drawing passageway 21 cross sections is 16.5mm in the core rod 20, and minor face B2 is 5.6mm, and the oval radian R1 in long limit is 42.6mm, and the oval radian R2 of minor face is 15.8mm, and knuckle radius r2 is 1.15mm.

By utilizing oval transition mould to alleviate the radial pressure that flat tube flattens, make pipe in the intermediate deformation process, remain slyness, can not produce intermediate groove because of radial pressure is excessive.

More preferably, can also increase the elliptical modes transition of a time in above-mentioned transition first being processed.Promptly adopt twice transition deformation processing technique can obtain better finished product.Wherein first passage can be the transition of elliptical mode tool, and second passage can be the flat oval mould of transition shape.

As Fig. 4, Figure 5 shows that the structural representation of finished product mould.Among Fig. 4, long limit A is the finished product length of long sides, and B is the finished product length of short sides, and r is a knuckle radius.Among Fig. 5, a is a modular angle, and h is the mould sizing.

To finished product, the decrement of its girth is respectively from circular pipe: 2.4%, 2%, 2.6%.Transition by twice transition mould stretches, the super flat copper pipe of final formation.

Adopt the utility model can realize that disk stretches, produce big length, appearance is smooth, the flat copper that is used for electromagnetic wire of high dimensional accuracy.

More than describe preferred embodiment of the present utility model in detail.The ordinary skill that should be appreciated that this area need not creative work and just can make many modifications and variations according to design of the present utility model.Therefore, all technical staff in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in claim protection domain of the present utility model.

Claims

1, a kind of transition processing mold that is used for the flat copper pipe of electromagnetic wire comprises the disc external mold, detachably is provided with core rod in the described external mold; It is characterized in that: the middle part of described core rod offers a drawing passageway that connects; The cross section of described drawing passageway is oval.

2, transition processing mold as claimed in claim 1 is characterized in that: when described core rod was the finished product core rod, the cross section of described drawing passageway was the rectangle of aspect ratio.