CN210586362U

CN210586362U - Hot rolling die for hollow wire rod

Info

Publication number: CN210586362U
Application number: CN201921499416.7U
Authority: CN
Inventors: 陈利荣; 徐小红; 徐顺庆
Original assignee: Lishui Jide Industrial Co ltd
Current assignee: Lishui Jide Industrial Co ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-05-22
Anticipated expiration: 2029-09-10

Abstract

The utility model discloses a hot rolling mould of cavity wire rod, its characterized in that: the core pulling core rod is fixed in an inner cavity of the mold barrel, a first overflow channel, a second overflow channel, a third overflow channel and a fourth overflow channel are formed between the core pulling core rod and the inner cavity of the mold barrel, the first overflow channel is located at an outlet of the mold and is an annular cylindrical hole matched with the shape of a hollow wire, the second overflow channel is a contracted conical hole, a small head end of the contracted conical hole is connected with the annular cylindrical hole, the third overflow channel is a plurality of fan-shaped holes distributed around the center circumference of the mold, an outlet end of each fan-shaped hole is connected with a large head end of the contracted conical hole, the fourth overflow channel is located at an inlet of the mold and is an annular horn-shaped hole, the small head end of the annular horn-shaped hole is connected with an inlet end of the fan-shaped hole, and the large head end faces the. The utility model discloses the overflow volume is sufficient and overflows the resistance little, can be used to the hot rolling shaping of the cavity wire rod of carbon steel material.

Description

Hot rolling die for hollow wire rod

Technical Field

The utility model relates to a forming die, concretely relates to hot rolling mould for cavity wire rod hot rolling.

Background

The carbon steel wire is generally made of common carbon steel and high-quality carbon steel, and is largely used for cold heading of shaft rod parts, but when the shaft rod parts have hollow inner holes, the punching process of cold heading is difficult or impossible to complete, especially for shaft rod parts with longer length. Therefore, there is a need for a carbon steel material wire rod capable of directly forming a hollow structure upon hot rolling. However, carbon steel materials are different from aluminum alloy materials and have poor heat fluidity, so that it is difficult to directly perform hollow forming in a hot rolling die.

Disclosure of Invention

In view of the not enough of background art, the utility model aims to solve the technical problem that a sufficient resistance that overflows of overflow is little is provided, can be used to the fashioned hot rolling mould of carbon steel material cavity wire rod hot rolling.

Therefore, the utility model discloses an adopt following scheme to realize:

the hot rolling die for the hollow wire rod is characterized in that: the core pulling core rod is fixed in an inner cavity of the mold barrel, a first overflow channel, a second overflow channel, a third overflow channel and a fourth overflow channel are formed between the core pulling core rod and the inner cavity of the mold barrel, the first overflow channel is located at an outlet of the mold and is an annular cylindrical hole matched with the shape of a hollow wire, the second overflow channel is a contracted conical hole, a small head end of the contracted conical hole is connected with the annular cylindrical hole, the third overflow channel is a plurality of fan-shaped holes distributed around the center circumference of the mold, an outlet end of each fan-shaped hole is connected with a large head end of the contracted conical hole, the fourth overflow channel is located at an inlet of the mold and is an annular horn-shaped hole, the small head end of the annular horn-shaped hole is connected with an inlet end of the fan-shaped hole, and the large head end faces the.

According to the hot rolling die in the technical scheme, the overflowing channel of the inner cavity of the film barrel is optimally designed, and the annular horn hole, the fan-shaped hole, the shrinkage taper hole and the annular cylindrical hole are combined to form the overflowing channel which has the characteristics of sufficient overflowing amount and small overflowing resistance, so that the hot rolling die can be used for hot rolling and molding of hollow wires made of carbon steel materials.

For can conveniently form the combination intercommunication in annular horn hole, sector hole, shrink bell mouth and annular cylinder hole at the mould section of thick bamboo inner chamber, as preferred technical scheme: the mold cylinder consists of a front mold cylinder and a rear mold cylinder which are fixedly connected, the core pulling core rod consists of a core pulling part, a front cone part, a connecting part and a rear cone part which are of an integral structure, the connecting part is welded and fixed with the inner cylinder wall of the rear mold cylinder through a rib plate arranged on the outer circle of the connecting part, and cone holes are arranged on the inner cylinder walls of the front mold cylinder and the rear mold cylinder at the corresponding positions of the front cone part and the rear cone part so as to enclose a shrinkage cone hole and an annular horn hole together with the core pulling core rod.

Drawings

The utility model discloses there is following figure:

FIG. 1 is a view showing the shape of a wire rod hot-rolled by the present invention,

figure 2 is a schematic structural view of the present invention,

figure 3 is a left side view of figure 2,

fig. 4 is a right side view of fig. 2.

Detailed Description

As shown in figures 2-3, the utility model discloses a hot rolling die for hollow wire rods, which comprises a fixedly connected die cylinder (comprising a front die cylinder 1 and a rear die cylinder 2 which are locked by threaded connection) and a core rod 3, wherein the core rod 3 is fixed in the inner cavity of the die cylinder, a first, a second, a third and a fourth overflow channels which are connected front and back are formed between the core rod 3 and the inner cavity of the die cylinder, the first overflow channel is positioned at the outlet of the die and is an annular cylindrical hole 4 matched with the shape of the hollow wire rod, the second overflow channel is a contracted conical hole 5, the small end of the contracted conical hole 5 is connected with the annular cylindrical hole 4, the third overflow channel is three fan-shaped holes 6 arranged around the circumference of the center of the die, the outlet end of the fan-shaped hole 6 is connected with the large end of the contracted conical hole 5, the fourth overflow channel is positioned at the inlet of the die and is an annular horn-shaped hole 7, the small end of the annular, the big head end faces the rear end face of the die cylinder. The core rod 3 is composed of a core pulling part 31, a front cone 32, a connecting part 33 and a rear cone 34 which are integrally structured, the connecting part 33 is welded and fixed with the inner cylinder wall of the rear cylinder 2 through three ribs 8 arranged on the outer circle of the connecting part 33, and the inner cylinder walls of the front cylinder 1 and the rear cylinder 2 are provided with cone holes 9, 10 and 11 at the corresponding positions of the front cone 32 and the rear cone 34 so as to enclose a shrinkage cone hole 5 and an annular horn hole 7 together with the core rod 3.

When the hollow wire hot rolling die is used for hot rolling, the carbon steel material which is heated and melted enters the annular horn hole 7, passes through the fan-shaped hole 6 and the shrinkage taper hole 5 and is extruded from the annular cylindrical hole 4, and then the hollow wire of the carbon steel material shown in the figure 1 is hot rolled.

Claims

1. The hot rolling die for the hollow wire rod is characterized in that: the core pulling core rod is fixed in an inner cavity of the mold barrel, a first overflow channel, a second overflow channel, a third overflow channel and a fourth overflow channel are formed between the core pulling core rod and the inner cavity of the mold barrel, the first overflow channel is located at an outlet of the mold and is an annular cylindrical hole matched with the shape of a hollow wire, the second overflow channel is a contracted conical hole, a small head end of the contracted conical hole is connected with the annular cylindrical hole, the third overflow channel is a plurality of fan-shaped holes distributed around the center circumference of the mold, an outlet end of each fan-shaped hole is connected with a large head end of the contracted conical hole, the fourth overflow channel is located at an inlet of the mold and is an annular horn-shaped hole, the small head end of the annular horn-shaped hole is connected with an inlet end of the fan-shaped hole, and the large head end faces the.

2. The hot rolling die for a hollow wire rod as claimed in claim 1, wherein: the mold cylinder consists of a front mold cylinder and a rear mold cylinder which are fixedly connected, the core pulling core rod consists of a core pulling part, a front cone part, a connecting part and a rear cone part which are of an integral structure, the connecting part is welded and fixed with the inner cylinder wall of the rear mold cylinder through a rib plate arranged on the outer circle of the connecting part, and cone holes are arranged on the inner cylinder walls of the front mold cylinder and the rear mold cylinder at the corresponding positions of the front cone part and the rear cone part so as to enclose a shrinkage cone hole and an annular horn hole together with the core pulling core rod.