阅读说明：本技术 钨钼棒线材两辊轧机的导卫装置 (Guide device of tungsten-molybdenum bar wire two-roll mill ) 是由 陈学军 李猛进 张海坡 袁瑞杰 王守海 李猛 周军涛 于 2019-11-25 设计创作，主要内容包括：本发明公开了一种钨钼棒线材两辊轧机的导卫装置,包括导卫本体和内部镶块,导卫本体包含法兰端部、圆筒主体部、避让端部,沿导卫本体的中心轴线方向在导卫本体内部贯通设置有空腔,空腔包括喇叭口形式的锥孔和圆孔,内部镶块为空腔圆筒结构并安装在导卫本体的圆孔内。本发明的导卫装置耐磨性显著提高,制造成本进一步降低,能够将钨钼棒线材轧件顺利扶持导入轧机变形区中,完成高温轧制变形过程。(The invention discloses a guide device of a tungsten-molybdenum bar wire two-roll mill, which comprises a guide body and an internal insert, wherein the guide body comprises a flange end part, a cylinder main body part and an avoiding end part, a cavity is arranged in the guide body in a through manner along the central axis direction of the guide body, the cavity comprises a conical hole and a round hole in a bell mouth manner, and the internal insert is in a cavity cylinder structure and is arranged in the round hole of the guide body. The guide and guard device provided by the invention has the advantages that the wear resistance is obviously improved, the manufacturing cost is further reduced, and the tungsten molybdenum rod wire rolled piece can be smoothly supported and guided into a deformation area of a rolling mill to complete a high-temperature rolling deformation process.)

1. The utility model provides a tungsten molybdenum bar wire rod two-roll mill's guide and guard device which characterized in that, guide and guard device is including leading and guarding the body and inside insert, it contains flange tip, drum main part, dodges the tip to lead the body the central axis direction of leading and guarding the body is in it is inside to link up and be provided with the cavity to lead and defend the body, the cavity includes the taper hole and the round hole of horn mouth form, inside insert for cavity drum structure and install lead and defend the body in the round hole.

2. The guide and guard device of a tungsten molybdenum bar wire two-roll mill according to claim 1, wherein in the guide and guard body, the tapered hole starts from the flange end portion and ends at a portion of the cylindrical main body portion, and the circular hole starts from the tapered hole and ends at the relief end portion.

3. The guide device of a tungsten molybdenum bar wire two-roll mill according to claim 2, wherein the inner insert comprises an outer cylinder wall and an inner hole penetrating through the inner part of the inner insert, the guide body and the inner insert are connected in a hot press fit manner, and the outer cylinder wall of the inner insert and the circular hole of the guide body form a matching surface.

4. The guide and guard device of a tungsten molybdenum rod and wire two-roll mill according to claim 1, wherein the shape of the inner bore of the internal insert is adapted to the cross-sectional shape of the tungsten molybdenum rod and wire product, and the cross-sectional dimension of the inner bore of the internal insert is larger than the cross-sectional dimension of the tungsten molybdenum rod and wire product.

5. The guide and guard device of a tungsten molybdenum bar wire two-roll mill according to claim 1, wherein the cross-sectional shape of the avoiding end is a cone, a circular arc or a truncated cone.

6. The guide and guard device of a tungsten molybdenum bar wire two roll mill of claim 1 wherein the guide and guard body is of symmetrical two piece construction and the inner insert is of symmetrical two piece construction.

7. The guide device of a tungsten molybdenum bar wire two-roll mill according to claim 1, wherein the flange end portion, the cylinder main body portion, the avoiding end portion, the taper hole and the circular hole of the guide body are integrally formed, and the inner hole of the inner insert and the outer cylinder wall are integrally formed.

8. The guide device of the tungsten molybdenum bar wire two-roll mill according to claim 1, wherein the cylindrical main body part of the guide body is mounted on the guide seat of the tungsten molybdenum bar wire two-roll mill and fixed with the guide seat of the tungsten molybdenum bar wire two-roll mill through the flange end part.

9. The guide device of the tungsten-molybdenum bar wire two-roll mill according to any one of claims 1 to 8, wherein the material for manufacturing the guide body is selected from hot die steel, carbon tool steel and high speed steel, and the material for manufacturing the inner insert is selected from TZM alloy and cemented carbide.

Technical Field

The invention relates to the technical field of rod and wire rolling mills, in particular to a guide and guard device of a two-roller rolling mill for rolling tungsten-molybdenum rods and wires.

Background

The tungsten-molybdenum rod wire is rolled at high temperature and high speed. The rolling temperature is usually between 1300 ℃ and 1700 ℃, and such high temperature is a great challenge for the rolling mill guide and guard device. Hot die steel such as 3Cr2W8V and 4Cr5MoSiV1 is adopted as a manufacturing material of the rolling mill guide in the prior art. The rolling mill guide made of the materials has quick abrasion at high temperature, can not continuously and stably guide and support a rolled piece, and causes the rolling rod to deflect when in rolling deformation and even fall into a blank to form ear and other rolling defects under serious conditions. And the guide and guard parts are frequently replaced, so that the production efficiency is further low, and the production rhythm is seriously influenced. The guide and guard made of materials which are more wear-resistant at high temperature are always the pursuit direction of tungsten-molybdenum bar rolling technology. The material with excellent wear resistance at high temperature, such as hard alloy, TZM (titanium zirconium molybdenum alloy) and the like can be used for manufacturing a guide device of a tungsten molybdenum rod rolling mill. However, these materials are expensive, time consuming and expensive to machine into the appropriate cavity shape.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a guide and guard device of a tungsten-molybdenum bar two-roll rolling mill, which comprises a guide and guard body and an internal insert, wherein the guide and guard body comprises a flange end part, a cylinder main body part and an avoiding end part, a cavity is arranged in the guide and guard body in a penetrating way along the central axis direction of the guide and guard body, the cavity comprises a conical hole and a round hole in a bell mouth shape, and the internal insert is in a cavity cylinder structure and is arranged in the round hole of the guide and guard body.

Preferably, in the guide and guard device for the tungsten-molybdenum rod and wire two-roll mill, the tapered hole starts from the flange end and ends at a part of the cylindrical main body, and the circular hole starts from the tapered hole and ends at the relief end.

Preferably, in the guide and guard device of the two-roll mill for tungsten-molybdenum rod wire, the internal insert includes an outer cylinder wall and an inner hole penetrating through the internal insert, the guide and guard body and the internal insert are connected in a hot press fit manner, and the outer cylinder wall of the internal insert and the circular hole of the guide and guard body form a matching surface.

Preferably, in the guide and guard device of the two-roll mill for tungsten-molybdenum rod and wire, the shape of the inner hole of the inner insert is adapted to the cross-sectional shape of the tungsten-molybdenum rod and wire rolled piece, and the cross-sectional dimension of the inner hole of the inner insert is larger than that of the tungsten-molybdenum rod and wire rolled piece.

Preferably, in the guide and guard device of the two-roll mill for tungsten-molybdenum rods and wires, the cross section of the avoiding end is conical, circular arc or truncated cone.

Preferably, in the guide and guard device of the two-roll tungsten-molybdenum rod rolling mill, the guide and guard body is of a symmetrical two-piece structure, and the inner insert block is of a symmetrical two-piece structure.

Preferably, in the guide and guard device of the two-roll mill for tungsten-molybdenum rod wire, the flange end portion, the cylinder main body portion, the avoiding end portion, the taper hole and the circular hole of the guide and guard body are integrally formed, and the inner hole of the inner insert and the outer cylinder wall are integrally formed.

Preferably, in the guide and guard device of the two-roll mill for tungsten-molybdenum rod and wire, the cylinder main body of the guide and guard body is mounted on the guide and guard seat of the two-roll mill for tungsten-molybdenum rod and wire, and is fixed to the guide and guard seat of the two-roll mill for tungsten-molybdenum rod and wire through the flange end.

Preferably, in the guide device of the tungsten-molybdenum rod two-roll mill, the material for manufacturing the guide body is selected from hot die steel, carbon tool steel and high-speed steel, and the material for manufacturing the inner insert is selected from TZM alloy and hard alloy

The guide and guard device of the tungsten-molybdenum bar wire two-roll mill has the advantages that through reasonable structural design and proper material selection, the wear resistance is obviously improved, the manufacturing cost is further reduced, a tungsten-molybdenum bar wire rolled piece can be smoothly supported and guided into a rolling mill deformation area to complete a high-temperature rolling deformation process, the tungsten-molybdenum bar wire rolled piece is not easy to deflect in the rolling process, and rolling defects cannot be generated, so that the problems that the guide and guard device of the tungsten-molybdenum bar wire two-roll mill in the prior art is not wear-resistant, is short in service life, is frequently replaced, is high in manufacturing cost, low in production efficiency, high in rolling defect occurrence rate and the like are solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a perspective view of a guide and guard device of a tungsten-molybdenum bar two-roll mill according to the present invention;

FIG. 2 is a cross-sectional view of the guide and guard device of the W-Mo rod two-roll mill of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the guide device of the tungsten-molybdenum bar wire two-roll mill of the invention comprises a guide body 1 and an inner insert 2. The guide body 1 is of a cavity structure and comprises a flange end portion 10, a cylinder main body portion 11 and an avoiding end portion 12, a cavity is arranged inside the guide body 1 in a penetrating mode along the direction of the central axis of the guide body 1, the cavity comprises a conical hole 13 and a round hole 14 in a horn mouth mode, the conical hole 13 starts from the flange end portion 10 and ends at one part of the cylinder main body portion 11, and the round hole 14 starts from the conical hole 13 and ends at the avoiding end portion 12. The inner insert 2 is arranged in the round hole 14 of the guide body 1, the inner insert 2 is of a hollow cylinder structure and comprises an inner hole 20 and an outer cylinder wall 21, the inner hole penetrates through the inner insert 2, and the outer cylinder wall 21 is matched with the round hole 14 of the guide body 1.

The guide body 1 and the inner insert 2 are connected through hot press fit, and the outer cylinder wall 21 of the inner insert 2 and the round hole 14 of the guide body 1 form a matching surface. After the guide body 1 and the inner insert 2 are assembled, the cylindrical main body part 11 of the guide body 1 is installed on a guide seat of a tungsten-molybdenum bar wire two-roller mill and is fixed with the guide seat of the tungsten-molybdenum bar wire two-roller mill through the flange end part 10. The bell-mouth-shaped taper hole 13 of the guide body 1 is used as an inlet of a tungsten-molybdenum rod wire rolled piece, so that the tungsten-molybdenum rod wire rolled piece can conveniently enter the guide device, the avoiding end part 12 of the guide body 1 forms an avoiding surface, the installation of a roll ring of a two-roll mill for the tungsten-molybdenum rod wire can be avoided, and meanwhile, the guide device can be closer to a rolling deformation area to stabilize the rolling process. The inner hole 20 of the inner insert 2 can effectively guide and support the tungsten-molybdenum rod wire rolled piece to enter a rolling deformation area, so that the rolling process is stabilized, and the tungsten-molybdenum rod wire rolled piece is prevented from deflecting after being subjected to rolling deformation stress.

Preferably, the guide body 1 is a symmetrical two-piece structure, and the two symmetrical pieces are formed independently and combined to form the guide body 1. Also preferably, the inner insert 2 is of a symmetrical two-piece construction, the symmetrical two pieces being formed separately from each other and combined to form the inner insert 2.

Alternatively, the flange end portion 10, the cylindrical main body portion 11, the escape end portion 12, and the taper hole 13 and the circular hole 14 of the guide body 1 are integrally formed. Also optionally, the inner bore 20 and the outer barrel wall 21 of the inner insert 2 are integrally formed.

Preferably, the shape of the inner hole 20 of the inner insert 2 is adapted to the cross-sectional shape of the rolled tungsten-molybdenum rod wire product, i.e., if the rolled tungsten-molybdenum rod wire product has an elliptical cross-section, the inner hole 20 is also elliptical, and if the rolled tungsten-molybdenum rod wire product has a circular cross-section, the inner hole 20 is also circular. Furthermore, it is understood that the cross-sectional dimension of the inner bore 20 of the inner insert 2 is larger than the cross-sectional dimension of the introduced tungsten molybdenum rod rolled piece, so as to facilitate the passage of the tungsten molybdenum rod rolled piece.

Preferably, the cross-sectional shape of the bypass end 12 may be conical, circular arc, truncated cone, or the like.

Preferably, in order to adapt to the rolling temperature of the tungsten-molybdenum rod wire rod of 1300-1700 ℃, the manufacturing material of the guide body 1 can be hot-work die steel, carbon tool steel, high-speed steel and the like; the inner insert 2 can be made of high-temperature resistant materials such as TZM alloy, hard alloy and the like.

Through reasonable structural design and proper material selection, the wear resistance of the guide device of the tungsten-molybdenum bar wire two-roll mill is obviously improved, and the manufacturing cost is further reduced. Meanwhile, the guide and guard device of the tungsten-molybdenum bar and wire two-roller mill can smoothly support and guide a tungsten-molybdenum bar and wire rolled piece into a rolling mill deformation area to complete a high-temperature rolling deformation process, the tungsten-molybdenum bar and wire rolled piece is not easy to deflect in the rolling process, and rolling defects are avoided, so that the problems that the guide and guard device of the tungsten-molybdenum bar and wire two-roller mill in the prior art is not wear-resistant, is short in service life, frequent in replacement, high in manufacturing cost, low in production efficiency, high in rolling defect occurrence rate and the like are solved.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be further noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or alterations do not depart from the spirit of the invention.