CN212551060U

CN212551060U - Contact line drawing die structure

Info

Publication number: CN212551060U
Application number: CN202020897657.3U
Authority: CN
Inventors: 冯岳军; 卞方宏; 谷正行; 程芳; 承华
Original assignee: Jiangyin Electrical Alloy Co Ltd
Current assignee: Jiangyin Electrical Alloy Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-02-19
Anticipated expiration: 2030-05-26

Abstract

The utility model relates to a contact wire drawing die structure belongs to the contact wire and makes technical field. A contact line drawing die structure is provided with four dies from large to small, and comprises a first gap bridge die (1), a second gap bridge die (2), a third gap bridge die (3) and a finished product die (4); the first gap bridge die (1), the second gap bridge die (2) and the third gap bridge die (3) are three circular dies which are arranged from large to small; the finished product die (4) is a special-shaped die, and the structure of the special-shaped die is matched with that of a contact line finished product. The utility model discloses because the gap bridge mould is whole to be set up to the circle mould, consequently solved the drawing proportion problem between the gap bridge mould, the reason that does not have the drawing proportion leads to the product to break.

Description

Contact line drawing die structure

Technical Field

The utility model relates to a contact wire drawing die structure belongs to the contact wire and makes technical field.

Background

In the prior art, a contact wire is a key component for ensuring the normal operation of an electrified railway, and the contact wire transmits electric energy from a transformer station to an electric locomotive through the direct contact sliding friction with a pantograph slide plate of the electric locomotive. Therefore, the contact wire must have high strength and high conductivity, and the strength is mainly ensured by cold working, and the strength is ensured by multi-die drawing in the production process. High-strength contact wires in the current market are difficult to produce in batches due to dies.

Chinese patent with patent publication No. CN110993190A discloses a contact wire and its preparation method and application. The preparation method of the contact line comprises the following steps: drawing the extrusion rod by adopting a four-pass special-shaped die: sequentially loading the dies into a four-die huge drawing machine from large to small, and then sequentially drawing and pulling the extrusion rod through the special-shaped dies from large to small to obtain a contact line; the deformation of the die in each pass is 20-25%, 27-33%, 27-32% and 23-27% in sequence; the first three-pass special-shaped die is a die with fixed size, and the fourth-pass special-shaped die is a finished die.

The four-pass special-shaped die can realize continuous production, simplifies the procedures of replacing the die, rolling head, penetrating the die and the like, greatly improves the production efficiency and reduces the labor intensity; and the size of the special-shaped die can meet the requirement of drawing deformation of copper-silver, copper-magnesium and copper-tin contact wires.

But the drawing proportion between each die of the special-shaped die is not easy to control, the sizes of the special-shaped die parts are worn to cause the inconsistent front and back drawing proportions, and drawn products are easy to break or poor phenomena such as flanging, sparrow skins and the like are easy to occur at grooves. And the drawing and placing angles between the gap bridge dies are not consistent, and the phenomena of flanging, sparrow skin and the like are easy to occur.

Therefore, the development of a contact line drawing die structure is urgent.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of proposing in the above-mentioned background problem, provide a contact wire drawing die structure, its is rational in infrastructure, has solved the drawing proportion problem between the bridge die, does not have the reason of drawing proportion and leads to the product to break.

The purpose of the utility model is realized like this: a contact line drawing die structure is provided with four dies from large to small, and comprises a first gap bridge die, a second gap bridge die, a third gap bridge die and a finished product die;

the first gap bridge die, the second gap bridge die and the third gap bridge die are three circular dies which are arranged from large to small;

the finished product die is a special-shaped die, and the structure of the finished product die is matched with that of a contact line finished product.

The first gap bridge die, the second gap bridge die, the third gap bridge die and the finished product die are arranged in a four-die giant drawing machine.

Compared with the prior art, the utility model has the advantages of it is following:

in the contact line drawing die structure of the utility model, all the gap bridge dies are round dies, so that the problem of drawing proportion between the gap bridge dies is solved, and the product is broken due to no reason of the drawing proportion;

the contact line drawing die structure of the utility model also solves the problem that the placing angle between the gap bridge dies is difficult to be accurate because the gap bridge dies are all round dies;

the utility model discloses a contact wire drawing die structure, because three cross the bridge die and all adopt the circle mould, formed the super large angle pan feeding mouth of slot department, slot department deformation zone compares greatly with the past like this and shortens, and the resistance that receives during the drawing diminishes, easily draws, at last one fluting back at sizing district shaping at once, has practiced thrift production time greatly.

Drawings

Fig. 1 is a schematic view of the overall structure of a prior art lower mold.

Fig. 2 is the structure schematic diagram of the contact wire drawing die of the present invention.

Wherein: 1. a first bridge die; 2. a second gap bridge die; 3. a third gap bridge die; 4. and (5) finishing the die.

Detailed Description

The invention is described below with reference to the accompanying drawings and specific embodiments:

as shown in fig. 2, a contact line drawing die structure is provided with four dies from large to small, including a first gap bridge die 1, a second gap bridge die 2, a third gap bridge die 3 and a finished die 4;

the first gap bridge die 1, the second gap bridge die 2 and the third gap bridge die 3 are three circular dies arranged from large to small;

the finished product die 4 is a special-shaped die, and the structure of the special-shaped die is matched with that of a contact line finished product.

The first gap bridge die 1, the second gap bridge die 2, the third gap bridge die 3 and the finished product die 4 are arranged in a four-die giant drawing machine.

The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims

1. The utility model provides a contact line drawing die structure which characterized in that: four dies are arranged from large to small, and each die comprises a first gap bridge die (1), a second gap bridge die (2), a third gap bridge die (3) and a finished product die (4);

the first gap bridge die (1), the second gap bridge die (2) and the third gap bridge die (3) are three circular dies which are arranged from large to small;

the finished product die (4) is a special-shaped die, and the structure of the special-shaped die is matched with that of a contact line finished product.

2. The contact line drawing die structure of claim 1, wherein: the first gap bridge die (1), the second gap bridge die (2), the third gap bridge die (3) and the finished product die (4) are arranged in a four-die giant drawing machine.