CN216175391U

CN216175391U - Wire stripping die

Info

Publication number: CN216175391U
Application number: CN202122662238.9U
Authority: CN
Inventors: 俞娟根; 施在平
Original assignee: Pinghu Jinping Wire Drawing Die Co ltd
Current assignee: Pinghu Jinping Wire Drawing Die Co ltd
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-04-05
Anticipated expiration: 2031-11-01

Abstract

The utility model discloses a wire stripping die, which relates to the field of metal wire processing and aims to solve the problem that a wire passing channel is lack of integral consistency, and the technical scheme is characterized in that: a wire peeling die comprises a die sleeve, wherein a polycrystalline die core is arranged at the axis of one end of the die sleeve, and a sintered body is arranged between the polycrystalline die core and the die sleeve; the wire passing hole is formed in the central axis of the die sleeve and the polycrystalline die core, the wire passing hole is sequentially provided with a sizing section, an initial expansion section and an outlet expansion section from the front end of the polycrystalline die core, the sizing section and the initial expansion section are arranged on the polycrystalline die core, the outlet expansion section is arranged on the die sleeve, and the included angle of the initial expansion section is smaller than that of the outlet expansion section. The wire stripping die disclosed by the utility model has better hardness and smoothness, the service life is effectively prolonged, the production convenience is effectively improved, and the integral consistency of wire passing holes is improved.

Description

Wire stripping die

Technical Field

The utility model relates to the field of metal wire processing, in particular to a wire stripping die.

Background

The stripping die is one of wire drawing dies, and has the working characteristic that the scrap on the surface of the metal wire is stripped by drawing the metal wire to pass through.

Most of the existing wire stripping dies are made of hard alloy, the service life is short, and sometimes only hundreds of kilograms of spring steel wires can be produced, so that the production efficiency is greatly influenced.

A wire rod module of skinning to the chinese patent publication of above-mentioned problem publication number CN213257527U, its technical characterstic is: including the die sleeve of skinning and inlay and establish the die core of skinning of die sleeve one end portion, the die sleeve of skinning include echelonment inlay set chamber and with the coaxial line passageway of crossing of nested chamber, the die core of skinning is nested through circumference lateral surface and bottom face in inlay set chamber, it says to have set up the chamber of skinning in the die core of skinning, the chamber of skinning say with the line passageway intercommunication of crossing of the die sleeve of skinning, the surface of the die core of skinning and the chamber of skinning say and sink to establish (Ti, Al) N coating on the surface.

According to the technical scheme, the surface hardness of the mold core is improved through the coating, so that the hidden danger of abrasion is reduced, but experiments show that the thickness of the coating is not easy to control, the coated mold core and the mold sleeve cannot be processed together, and the problem that the wire passing channel is lack of integral consistency exists; therefore, a new solution is needed to solve this problem.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide the wire stripping die which has better hardness and smoothness, effectively prolongs the service life, improves the production convenience and improves the integral consistency of wire passing holes.

The technical purpose of the utility model is realized by the following technical scheme: a wire peeling die comprises a die sleeve, wherein a polycrystalline die core is arranged at the axis of one end of the die sleeve, and a sintered body is arranged between the polycrystalline die core and the die sleeve; the wire passing hole is formed in the central axis of the die sleeve and the polycrystalline die core, the wire passing hole is sequentially provided with a sizing section, an initial expansion section and an outlet expansion section from the front end of the polycrystalline die core, the sizing section and the initial expansion section are arranged on the polycrystalline die core, the outlet expansion section is arranged on the die sleeve, and the included angle of the initial expansion section is smaller than that of the outlet expansion section.

By adopting the technical scheme, the wire stripping die provided by the application adopts the sintered body to connect the polycrystalline die core and the die sleeve, so that the polycrystalline die core replaces high-strength alloy and high-strength alloy surface coatings commonly applied in the prior art; compared with the mode that high-strength alloy is directly adopted as the mold core, the mold has better hardness and smoothness, and the service life is effectively prolonged; compared with the mode that the high-strength alloy and the surface coating are adopted as the mold core, the die sleeve and the polycrystalline mold core can be synchronously processed after assembly to form the wire passing hole on the premise that the surface hardness is met, the production convenience is effectively improved, and the integral consistency of the wire passing hole is improved; it should be noted here that, in the prior art, the high-strength alloy + surface coating is limited by the thickness of the coating, and cannot be processed after assembly, and the inner holes of the die sleeve and the die core need to be processed separately, and after the die core finishes the coating, the wire passing holes are formed by assembling, so that the high-strength alloy + surface coating is limited by the difficulty in controlling the processing precision and the thickness of the coating, and the problem of poor consistency due to inevitable gradient of the wire passing holes; and, this application optimizes through the overall arrangement to crossing the line hole, gives the sizing section that has certain length promptly to improve the wire rod and skin the line diameter stability and the smooth surface nature after peeling, utilize initial extension section and export extension section cooperation to form loudspeaker form flaring structure, thereby reduce the levelness requirement after the wire rod passes, thereby facilitate for rolling and drawing, the contained angle of injecing initial extension section is less than the contained angle of export extension section, thereby reduce the hidden danger that the die sleeve was worn and torn.

The utility model is further configured to: the end face of the die sleeve is provided with an embedded ring, the embedded ring is in interference clamping connection with a tungsten steel ring, and the end faces of the tungsten steel ring, the sintered body and the polycrystalline die core are combined to form a stripping conical surface.

The utility model is further configured to: the included angle of the stripping conical surface is 160-170 degrees.

The utility model is further configured to: the end face of the tungsten steel ring matched with the die sleeve is provided with a middle shaft groove, and the sintered body and the polycrystalline die core are arranged in the middle shaft groove.

The utility model is further configured to: the inner circumferential surface of the tungsten steel ring is provided with a ring groove, and the sintered body is provided with a convex edge embedded into the ring groove.

The utility model is further configured to: the angle of the sizing section is 0 degree, the ratio of the diameter to the length is 10: 2-10: 3.

the utility model is further configured to: the included angle of the initial expansion section is 15-25 degrees, and the included angle difference between the outlet expansion section and the initial expansion section is +19 degrees.

In conclusion, the utility model has the following beneficial effects: the polycrystalline mold core replaces a high-strength alloy and a high-strength alloy surface coating which are generally applied in the prior art; compared with the mode that high-strength alloy is directly adopted as the mold core, the mold has better hardness and smoothness, and the service life is effectively prolonged; compared with the mode that the high-strength alloy and the surface coating are adopted as the mold core, the die sleeve and the polycrystalline mold core can be synchronously processed after assembly to form the wire passing hole on the premise that the surface hardness is met, the production convenience is effectively improved, and the integral consistency of the wire passing hole is improved; endowing the sizing section with a certain length, thereby improving the wire diameter stability and the surface smoothness of the peeled wire rod; the initial expanding section and the outlet expanding section are matched to form a horn-shaped flaring structure, so that the levelness requirement of the wire after passing through is reduced, and convenience is provided for rolling and traction; the included angle of the initial expanding section is limited to be smaller than that of the outlet expanding section, so that the hidden danger that the die sleeve with lower surface hardness is abraded is reduced.

Drawings

FIG. 1 is an overall cross-sectional view of the present application;

fig. 2 is a dimension marking diagram of the present application.

Description of the drawings: 1. die sleeve; 11. embedding a ring; 12. a tungsten steel ring; 13. stripping the conical surface; 14. a central shaft groove; 15. a ring groove; 16. a convex edge; 2. a polycrystalline mold core; 3. a sintered body; 4. a wire passing hole; 41. a sizing section; 42. an initial extension segment; 43. an exit expansion section.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A wire stripping die comprises a die sleeve 1, wherein a polycrystalline die core 2 is arranged at the axis of one end of the die sleeve 1, a sintered body 3 is filled and sintered between the polycrystalline die core 2 and the die sleeve 1 and is fixed, and a wire passing hole 4 is formed along the central axis of the die sleeve 1 and the polycrystalline die core 2 in a machining mode.

The wire stripping die provided by the application adopts the sintered body 3 to connect the polycrystalline die core 2 and the die sleeve 1, so that the polycrystalline die core 2 replaces high-strength alloy and high-strength alloy surface coatings which are commonly applied in the prior art; compared with the mode that high-strength alloy is directly adopted as the mold core, the mold has better hardness and smoothness, and the service life is effectively prolonged; compared with the mode that high-strength alloy and a surface coating are adopted as the mold core, the die sleeve 1 and the polycrystalline mold core 3 can be synchronously processed to form the wire passing hole 4 after assembly on the premise that the surface hardness is met, the production convenience is effectively improved, and the integral consistency of the wire passing hole 4 is improved; it should be noted here that, in the prior art, the thickness of the high-strength alloy + surface coating is small, so that the wire passing hole 4 cannot be machined after assembly, the inner holes of the die sleeve 1 and the die core need to be machined separately, after the die core finishes the coating, the wire passing hole 4 is formed by assembling, the machining precision and the thickness of the coating are limited, the wire passing hole 4 inevitably has a gradient, and the problem of poor consistency exists.

The specific structure of the wire passing hole 4 is as follows, as shown in fig. 1, the wire passing hole 4 is sequentially provided with a diameter fixing section 41, an initial expanding section 42 and an outlet expanding section 43 from the front end of the polycrystalline mold core 2, the diameter fixing section 41 and the initial expanding section 42 are arranged on the polycrystalline mold core 2, the outlet expanding section 43 is arranged on the mold sleeve 1, and the included angle of the initial expanding section 42 is smaller than that of the outlet expanding section 43.

This application is optimized through the overall arrangement to crossing wire hole 4, give the sizing section 41 that has certain length promptly, thereby improve the wire rod and skin the line diameter stability and the smooth nature in surface after peeling, utilize initial extension section 42 and export extension section 43 cooperation to form loudspeaker form flaring structure, thereby reduce the levelness requirement after the wire rod passes, and then facilitate for the rolling with drawing, the contained angle of injecing initial extension section 42 is less than the contained angle of export extension section 43, thereby reduce the hidden danger that the lower die sleeve 1 of surface hardness was worn and torn.

In order to avoid the end face of the die sleeve 1 from being worn by the object to be stripped, as shown in fig. 1, an embedded ring 11 is arranged on the end face of the die sleeve 1, a tungsten steel ring 12 is clamped on the embedded ring 11 in an interference manner, and a stripping conical surface 13 is formed by combining the tungsten steel ring 12, the sintered body 3 and the end face of the polycrystalline die core 2, so that the tungsten steel ring 12 replaces the end face of the die sleeve 1 to form the stripping conical surface 13 in a matching manner, and further, the potential hazard of end face abrasion is effectively reduced by utilizing the surface hardness characteristic of the tungsten steel ring 12.

It should be noted that, as shown in fig. 2, the included angle of the peeling conical surface 13 is 160 ° to 170 °, and the preferred angle of the present embodiment is 170 °, so that the peeling efficiency is effectively improved by using the large-angle peeling conical surface 13, and the falling point controllability of the detached object is improved, thereby achieving the technical effect of facilitating the collection of the waste material.

It should be noted that, as shown in fig. 1, a central axial groove 14 is formed on the end surface of the tungsten steel ring 12 that is matched with the die sleeve 1, and the sintered body 3 and the polycrystalline die core 2 are installed in the central axial groove 14, so that the sintered body 3 is used to reinforce the tungsten steel ring 12, the die sleeve 1 and the polycrystalline die core 2, and the structural strength of the whole die is effectively improved.

In order to improve the connection strength between the tungsten steel ring 12 and the sintered body 3, as shown in fig. 1, an annular groove 15 is formed on the inner circumferential surface of the tungsten steel ring 12, and a protruding edge 16 embedded in the annular groove 15 is integrally formed on the sintered body 3, so that the mutual embedding between the annular groove 15 and the protruding edge 16 effectively improves the connection strength between the tungsten steel ring 12 and the sintered body 3, and further reduces the hidden danger that the sintered body 3 is separated from the die sleeve 1.

In order to improve the quality of the peeled wire, as shown in fig. 2, the application obtains the optimized specific size of the wire passing hole 4 through a large number of experiments as follows:

the angle of the sizing section 41 is 0 DEG, the diameter thereof is D (customized according to the diameter of the processed wire rod), the length thereof is 0.2D-0.3D (customized according to the requirement of surface smoothness), thereby balancing the influence of temperature rise and flattening on the dimensional stability and the surface smoothness of the wire rod by optimizing the diameter and length ratio; the included angle of the initial expanding section 42 is 15-25 degrees, the preferred included angle in the embodiment is 20 degrees, the included angle difference value between the outlet expanding section 43 and the initial expanding section 42 is +19 degrees, and the occurrence of large folding angles is avoided on the premise that the angle difference value is limited and the die sleeve 1 is protected, so that the hidden danger of wire damage is reduced.

The specific embodiments are only for explaining the present invention, and the present invention is not limited thereto, and those skilled in the art can make modifications without inventive contribution to the present embodiments as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a wire stripping die, includes die sleeve (1), its characterized in that: a polycrystalline mold core (2) is arranged at the axis of one end of the mold sleeve (1), and a sintered body (3) is arranged between the polycrystalline mold core (2) and the mold sleeve (1);

the edge the axis of die sleeve (1) and glomerocryst mold core (2) is provided with line hole (4), it is sizing section (41), initial extension section (42) and export extension section (43) by glomerocryst mold core (2) front end in proper order to cross line hole (4), sizing section (41) and initial extension section (42) set up in glomerocryst mold core (2), export extension section (43) set up in die sleeve (1), the contained angle of initial extension section (42) is less than the contained angle of export extension section (43).

2. The wire stripping die as claimed in claim 1, wherein: the end face of the die sleeve (1) is provided with an embedded ring (11), the embedded ring (11) is in interference clamping connection with a tungsten steel ring (12), and the end faces of the tungsten steel ring (12), the sintered body (3) and the polycrystalline die core (2) are combined to form a stripping conical face (13).

3. The wire stripping die as claimed in claim 2, wherein: the included angle of the stripping conical surface (13) is 160-170 degrees.

4. The wire stripping die as claimed in claim 2, wherein: the end face of the tungsten steel ring (12) matched with the die sleeve (1) is provided with a central axial groove (14), and the sintered body (3) and the polycrystalline die core (2) are arranged in the central axial groove (14).

5. The wire stripping die as claimed in claim 4, wherein: the inner circumferential surface of the tungsten steel ring (12) is provided with a ring groove (15), and the sintered body (3) is provided with a convex edge (16) embedded in the ring groove (15).

6. The wire stripping die as claimed in claim 1, wherein: the angle of the sizing section (41) is 0 DEG, and the ratio of the diameter to the length is 10: 2-10: 3.

7. the wire stripping die as claimed in claim 1, wherein: the included angle of the initial expanding section (42) is 15-25 degrees, and the included angle difference between the outlet expanding section (43) and the initial expanding section (42) is +19 degrees.