CN210305076U

CN210305076U - Diamond wire drawing die with gradually changed die hole angle

Info

Publication number: CN210305076U
Application number: CN201920826525.9U
Authority: CN
Inventors: 张慧昌; 方海江
Original assignee: SF Diamond Co Ltd
Current assignee: SF Diamond Co Ltd
Priority date: 2019-06-03
Filing date: 2019-06-03
Publication date: 2020-04-14
Anticipated expiration: 2029-06-03

Abstract

The utility model belongs to wire drawing mould field especially relates to a diamond wire drawing mould of nib angle gradual change. The die hole of the die core of the die comprises an inlet area, a lubricating area, a compression area and an inverted cone outlet area from top to bottom along the axial length, wherein the joint of the compression area and the inverted cone outlet area is a sizing area; the inner wall of the die hole from the inlet area to the sizing area is in smooth transition, and the inner diameter of the die hole is gradually changed from large to small; the inner wall of the die hole from the sizing area to the inverted cone outlet area is in smooth transition, and the inner diameter of the die hole is gradually changed from small to large. The utility model discloses simple structure carries out optimal design to the nib of mould, has redefined the structural parameter of mould mold core internal diameter profile, can effectively be used for the production of 0.1mm and 0.01mm hierarchical microfilament.

Description

Diamond wire drawing die with gradually changed die hole angle

Technical Field

The utility model belongs to wire drawing mould field especially relates to a diamond wire drawing mould of nib angle gradual change.

Background

Drawing dies are generally understood to mean all kinds of dies for drawing metal wire, all of which have a hole of a given shape, generally circular, in the centre of the core. The metal is drawn through the die holes and changes in size and even shape to form a metal wire of desired gauge.

The mould used in the wire and pipe industry at present has single structure, simple and crude inlet and outlet angle design, and simple structure in a hole, and can not accurately realize the division of each area, so that the mould can not meet the requirements in the production of alloy steel, stainless steel wires and high-strength microwires with the thickness of more than 1.0mm, but can not achieve the effect of accurately controlling the diameter of the microwire for the production of the microwires with the thickness of 0.1mm and 0.01mm, and can not meet the requirements of the accuracy and the stability of the diameter of the microwire far away.

At present, the structure of a wire drawing die core can be divided into five sections (shown in figure 1 of the specification) of an inlet area 6, a lubrication area 7, a compression area 8, a sizing area 9 and an outlet area 10 according to working properties, wherein the five sections are respectively used for facilitating threading in the inlet area and preventing a steel wire from scratching a wire drawing die from the inlet and the direction, the lubrication area enables the steel wire to be easily brought into a lubricant, the compression area is a working area and is a main part of a die hole, the deformation process of the steel wire is carried out in the compression area, namely the original section is reduced to a required section size, when the metal with a conical surface is drawn, the space occupied by the volume of the metal in the working area is a circular table and is called as a deformation area, a cone half angle α in the working area is mainly used for determining the size of drawing force, the sizing area is used for obtaining the accurate size of the drawn steel wire, and the outlet area is used for preventing.

The internal diameter profile of the wire-drawing die core is important in determining the tension required to compress the wire and in affecting the residual stress in the wire after drawing. The die in the prior art still can not accurately control the wire diameter of the microwire, can not meet the requirements of wire diameter accuracy and stability, is not suitable for producing microwires with the grade of 0.1mm and 0.01mm, and has larger abrasion to the die core outlet area of the die.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a diamond wire drawing mould of nib angle gradual change, the utility model discloses simple structure carries out optimal design to the nib of mould, has redefined the parameter of mould mold core internal diameter profile, can effectively be used for 0.1mm and 0.01mm hierarchical microfilament production.

In order to solve the technical problem, the utility model discloses a technical scheme as follows:

a diamond wire drawing die with a gradually changed die hole angle is characterized in that the die hole of a die core of the die comprises an inlet area, a lubricating area, a compression area and an inverted cone outlet area from top to bottom along the axial length, wherein the joint of the compression area and the inverted cone outlet area is a sizing area; the inner wall of the die hole from the inlet area to the sizing area is in smooth transition, and the inner diameter of the die hole is gradually changed from large to small; the inner wall of the die hole from the sizing area to the inverted cone outlet area is in smooth transition, and the inner diameter of the die hole is gradually changed from small to large.

Preferably, the axial lengths of the inlet area, the lubricating area, the compression area and the inverted cone outlet area are respectively 15-25% of the axial length of the mold core; 15 to 25 percent; 40-50% and 10-20%.

Preferably, the axial lengths of the inlet area, the lubricating area, the compression area and the inverted cone outlet area are respectively 20% of the axial length of the mold core; 20 percent; 45% and 15%.

Preferably, the inner wall of the die hole of the inlet area is smooth, and the axial section angle is gradually reduced from 100 degrees to 85 degrees.

Preferably, the inner wall of the die hole of the lubricating area is smooth, and the axial section angle is gradually reduced from 80 degrees to 60 degrees.

Preferably, the inner wall of the die hole of the compression area is smooth, and the axial section angle is gradually reduced from 40 degrees to 30 degrees.

Preferably, the inverted cone outlet area further comprises an inverted cone area and an outlet area which are axially arranged up and down, the inner wall of the die hole of the inverted cone area is smooth, and the axial section angle is in an increasing shape of 40-60 degrees.

Preferably, the inner wall of the die hole of the outlet area is smooth, and the axial section angle is increased in a range of 70-90 degrees.

Compared with the prior art, the utility model, have following advantage:

1) the precision is high: by dividing the angle change range of each area, the precision of the diameter of the microfilament can be controlled within a tolerance range of +/-0.2 mu m in the drawing process of the microfilament, and the high-precision requirements of the microfilament with the grade of 0.1mm and 0.01mm are met.

2) The ring diameter is stable, and the angle change range of each zone is divided, wherein the axial section angle of the inverted cone zone of the inverted cone outlet zone and the section angle of the outlet zone of the inverted cone zone are gradually increased, so that the pressure applied to the microfilament in the drawing process can be effectively reduced; the axial sections of the inlet, the lubricating area and the compression area are gradually reduced, so that the stability of the microfilament is improved, the outgoing line is more stable, and the ring diameter is more stable;

3) the wear is little, through prescribing a limit to the axial length in each district, especially changes the sizing district that has certain length among the prior art mould core into the junction of compression zone and chamfer export district, not only can make the precision and the stability of microwire further improve, has also reduced the wearing and tearing that the microwire led to the fact the mould simultaneously by a wide margin.

Drawings

FIG. 1 is a schematic structural view of a prior art axial cross section of a die bore of a wire drawing die;

fig. 2 is a schematic structural view of an axial section of a die hole of a wire drawing die in an embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in figure 2, the diamond wire drawing die with the gradually-changed die hole angle comprises an inlet area 1, a lubricating area 2, a compression area 3, an inverted cone area 4 and an outlet area 5 from top to bottom along the axial length of a die core of the die, wherein the joint of the compression area 3 and the inverted cone area 4 is a sizing area, the inner wall of the die hole from the inlet area 1 to the sizing area is in smooth transition, the inner diameter of the die hole is gradually changed from large to small, the inner wall of the die hole from the sizing area to the outlet area 5 is in smooth transition, the inner diameter of the die hole is gradually changed from small to large, the axial total length of the inverted cone area 4 and the outlet area 5 can be one third of the axial length of the compression area 3, specifically, the axial lengths of the inlet area 1, the lubricating area 2 and the compression area 3 are 20 percent, 20 percent and 45 percent, the axial total length of the inverted cone area and the outlet area is 15 percent of the axial length of the die hole, the inner wall of the die hole in the smooth area is smooth, the axial section angle α is 100-85 degrees, the smooth inner wall of the smooth area is in the axial section area, the axial section, the inverted cone area is β -60 degrees, the axial section angle is gradually increased, the axial section of the smooth area is 40-60 degrees, the inner wall of the die hole is increased gradually increased from gamma-60 degrees, and the axial section of the smooth area is increased gradually.

Claims

1. A diamond wire drawing die with a gradually changed die hole angle is characterized in that the die hole of a die core of the die comprises an inlet area, a lubricating area, a compression area and an inverted cone outlet area from top to bottom along the axial length, wherein the joint of the compression area and the inverted cone outlet area is a sizing area; the inner wall of the die hole from the inlet area to the sizing area is in smooth transition, and the inner diameter of the die hole is gradually changed from large to small; the inner wall of the die hole from the sizing area to the inverted cone outlet area is in smooth transition, and the inner diameter of the die hole is gradually changed from small to large.

2. The diamond wire drawing die with the gradually changed die hole angle as claimed in claim 1, wherein the axial lengths of the inlet area, the lubricating area, the compression area and the inverted cone outlet area are respectively 15-25% of the axial length of the die core; 15 to 25 percent; 40-50% and 10-20%.

3. The diamond wire drawing die with the gradually changed die hole angle as claimed in claim 2, wherein the axial lengths of the inlet region, the lubricating region, the compression region and the inverted cone outlet region are respectively 20% of the axial length of the die core; 20 percent; 45% and 15%.

4. The die hole angle graded diamond wire drawing die of claim 1, wherein the die hole inner wall of the inlet zone is smooth and the axial section angle is gradually decreased from 100 ° to 85 °.

5. The diamond wire drawing die with gradually changed die hole angles as claimed in claim 1, wherein the inner wall of the die hole of the lubricating area is smooth, and the axial section angle is gradually reduced from 80 degrees to 60 degrees.

6. The diamond wire drawing die with gradually changed die hole angles as claimed in claim 1, wherein the inner wall of the die hole of the compression area is smooth, and the axial section angle is gradually reduced from 40 degrees to 30 degrees.

7. The diamond wire drawing die with the gradually-changed die hole angle as claimed in claim 1, wherein the inverted cone outlet region further comprises an inverted cone region and an outlet region which are axially and vertically arranged, the inner wall of the die hole of the inverted cone region is smooth, and the axial section angle is in an increasing shape of 40-60 degrees.

8. The die orifice angle graded diamond wire drawing die of claim 1, wherein the inner wall of the die orifice of the exit region is smooth and has an axial cross-sectional angle that increases in increments from 70 ° to 90 °.