CN211679340U

CN211679340U - Double-cone drawing die

Info

Publication number: CN211679340U
Application number: CN201922264618.XU
Authority: CN
Inventors: 王锦华
Original assignee: Sichuan Wanshengtong Industrial Co ltd
Current assignee: Sichuan Wanshengtong Industrial Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-10-16
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses a bipyramid drawing die, it includes the die body, and the die body divide into two conic sections, sizing section, entry and export section, two conic sections divide into first taper angle section and second taper angle section, the entry is the fillet shape, the export section is horn mouth and great mouth outwards, the angle b of second taper angle section is 23-25, the angle an of first taper angle section is 5-7, the length of sizing section is 15mm, and it has reduced the angle of second taper angle section for pull out the process gentler, lengthened sizing section's length, make the size of product more stable.

Description

Double-cone drawing die

Technical Field

The utility model belongs to the technical field of machining, concretely relates to bipyramid drawing die.

Background

The plastic forming process of drawing a metal blank through a die orifice to obtain an article having the same size and shape as the die orifice is called drawing. Drawing is one of the main methods of production of pipes, rods, profiles, and wire. The drawing production tool and equipment are simple in structure and convenient to maintain, products of multiple varieties and specifications can be produced on one equipment, the size of the products is accurate, and the surface is smooth and clean. Drawing equipment can be generally divided into tube-rod profile drawing machines and wire drawing machines.

Drawing is a plastic working method in which a metal blank is deformed by passing through a die hole of a drawing die. The blank generates plastic deformation in the drawing die in the drawing process, and the section shape and the size of the blank are the same as those of the outlet of the die hole of the drawing die after passing through the drawing die. Therefore, the shape and the size of the die hole of the drawing die are changed, and a corresponding drawing formed product can be obtained. The inventor finds that the prior arts have at least the following technical problems in the practical use process:

1. the length of the sizing section is difficult to determine, the tolerance sizing section of the product is too short, the size dispersity of the produced product is large, the sizing section is too long, the resistance in the cold drawing process is large, and the steel pipe is easy to break and has large dispersity in the cold drawing process.

2. The large excessive angle between the second taper angle and the sizing section leads to the low service life of the die and the large tolerance dispersity of products.

Disclosure of Invention

For overcoming above-mentioned not enough that exists, the utility model discloses an inventor continuously reforms transform and innovation through long-term exploration attempt and a lot of experiment and effort, has provided a bipyramid drawing die, and it has reduced the angle of second cone angle section for the drawing process is gentler, has lengthened the length of gauge section, makes the size of product more stable.

In order to realize the purpose, the utility model adopts the technical scheme that: a double taper drawing die is provided. The die body comprises a double-cone section, a sizing section, an inlet section and an outlet section, wherein the double-cone section comprises a first cone angle section and a second cone angle section, the inlet section is in a round angle shape, the outlet section is in a horn mouth, a larger opening of the outlet section faces outwards, an angle b of the second cone angle section is 23-25 degrees, an angle a of the first cone angle section is 5-7 degrees, and the sizing section is extended by 10mm on the original basis.

According to the utility model discloses a bipyramid drawing die, its further preferred technical scheme is: the angle b of the second conical angle section is 24 °.

According to the utility model discloses a bipyramid drawing die, its further preferred technical scheme is: the angle a of the first cone angle section is 6 °.

According to the utility model discloses a bipyramid drawing die, its further preferred technical scheme is: the die body is a thick-wall cylinder, and a double-cone taper angle section, a sizing section, an inlet section and an outlet section are arranged on the inner wall of the die body.

According to the utility model discloses a bipyramid drawing die, its further preferred technical scheme is: the length of the sizing section is 15mm, the length of the sizing section is moderate, the product has small dispersion and pulling force.

Compared with the prior art, the technical scheme of the utility model have following advantage beneficial effect:

1. the length of the sizing section is prolonged to 15mm, the length is proper, the size dispersibility of the product is small, and the steel pipe with overlarge drawing resistance cannot be broken.

2. The angle of the second taper angle section is reduced, so that the transition is smoother, the size dispersibility of the product is reduced, and the service life of the drawing die is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

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

The labels in the figure are respectively: 1. the die body 2, the outlet section 3, the sizing section 4, the double-cone section 5, the inlet section 6, the first taper angle section 7 and the second taper angle section.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but is merely representative of selected embodiments of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

Example 1:

the utility model discloses shown in fig. 1 is the structural schematic diagram, a bipyramid drawing die, die body 1 are a thick wall drum, and its die body 1's inner wall divide into two conic section 4, sizing section 3, entry section and export section 2, the entry section is the fillet shape, export section 2 is horn mouth and the great mouth outwards, and bipyramid compression section has divided into first taper angle section 6 and second taper angle section 7, and first taper angle section 6 is close to the entry section, and second taper angle section 7 is close to export section 2. And a sizing section 3 is arranged between the outlet section 2 and the second taper angle section 7, so that the steel pipe can be shaped before reaching the outlet, and the product quality is further ensured.

The angle of the inlet section and the outlet section 2 is larger than the integral angle of the double-cone compression section.

In order to further reduce the drawing force of the drawing die and prolong the service life of the drawing die, the angle a of the first taper angle section 6 is set to be 5-7 degrees, and the angle (taper) b of the second taper angle section 7 is set to be 23-25 degrees.

The utility model discloses a structure that changes current product combines reasonable angle of drawing simultaneously, changes traditional structural style, further increases the length of sizing section 3 for the tolerance dispersibility of steel pipe is little, and the product precision is higher, reduces the angle of first taper angle section 6, makes the steel pipe excessive gentler in the drawing die, and the littleer life of external mold pressure is longer, and product quality is higher. Therefore, the cost in production and processing is further reduced, and the economic benefit of enterprises is improved.

Through a large number of practices, in the using process, the effect is greatly improved when the angle b of the second taper angle section 7 is set to be 24 degrees and the angle a of the first taper angle section 6 is set to be 6 degrees, and the service life of the outer die can be improved by about 20 percent.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. The double-cone drawing die is characterized by comprising a die body, wherein the die body is divided into a double-cone section, a sizing section, an inlet section and an outlet section, the double-cone section is divided into a first cone angle section and a second cone angle section, the inlet section is in a round angle shape, the outlet section is in a horn mouth, a larger opening of the outlet section faces outwards, an angle b of the second cone angle section is 23-25 degrees, an angle a of the first cone angle section is 5-7 degrees, and the sizing section is prolonged by 10mm on the original basis.

2. A twin taper drawing die according to claim 1, in which the angle b of said second taper section is 24 °.

3. A twin cone drawing die according to claim 1 in which the angle a of the first conical angle section is 6 °.

4. A twin cone drawing die according to claim 1 in which the die body is a thick walled cylinder having a double cone angle section, a sizing section, an inlet section and an outlet section on the inner wall.

5. A twin cone drawing die according to claim 1 in which the length of the gauge section is 15 mm.