Inlet guide

Abstract

The utility model relates to the technical field of steel rolling, in particular to an inlet guide which comprises a guide body and a wear-resistant lining plate, two nose tips are arranged at one end of the guide body, two guide wheels are arranged on the guide body, and the wear-resistant lining plate is detachably arranged on the opposite inner sides, facing the guide body, of the nose tips. The wear-resistant lining plate is composed of a plane part and curved surface parts which are integrally arranged, the plane part is located on the side away from the guide wheels, the cross section of the plane part in the extending direction of the guide body is rectangular, the cross section of the curved surface parts in the extending direction of the guide body is fan-shaped, and the distance between the ends, away from the plane part, of the two curved surface parts is larger than that between the axes of the two guide wheels. According to the inlet guide provided by the utility model, the wear-resistant lining plate is arranged on the inner side of the nose tip, so that the wear of a steel billet to the nose tip is effectively controlled, the service life of the guide is effectively prolonged, and when the wear-resistant lining plate is damaged, only the wear-resistant lining plate needs to be replaced, and the whole guide does not need to be replaced; by means of the curved surface portion, when the guide wheel fixing pin is damaged, the guide can still accurately guide the steel billet.

Description

Technical Field

[0001] The utility model relates to the technical field of steel rolling, in particular to an inlet guide. Background Art

[0002] Steel rolling is a pressure processing process in which the shape of ingots and billets is changed between rotating rollers in order to obtain the desired shape or improve the internal quality of steel. Most of the rod and wire production adopts the elliptical-round hole system rolling, which is prone to steel inversion and twisting. In particular, most of the rods and wires currently adopt the slitting production process. These process problems will not only directly affect the product quality, but will also indirectly affect the final product quality by affecting the slitting line difference.

[0003] In order to prevent rolling process problems such as steel inversion and twisting during the rolling process, an imported guide device specifically used to guide the rolled piece is required. Most imported guides have the following characteristics when assisting the red billet to enter the rolling mill: fast speed, large impact force, fast wear, etc. The most widely used imported guides are the technical solutions disclosed in patent documents CN 219464357 U and CN 219724107U. In the prior art, the nose tip of the existing integral guide body is easy to wear, resulting in a larger spacing. After the nose tip part is worn, the guide body can only be replaced. Moreover, the online use time of the guide wheel after wear is short, and it needs to be replaced frequently, affecting production efficiency. In addition, bar production often needs to switch production between different specifications. The specification switching means that the material shape and the guide wheel spacing must also change frequently. Since the existing integral guide nose tip cannot be replaced separately after wear, the guide body can only be replaced as a whole. When changing the specification, only the guide wheel spacing can be adjusted, and the nose tip spacing cannot be adjusted. As a result, the guide has limited holding force on the material shape and poor material shape dimensional accuracy. Especially after the tail of the material is separated from the guide wheel, the material is basically in a free state, which makes it easy for ears to appear at the tail of the material, and finally form folding defects on the product, affecting product quality. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide an imported guide guard, which, by arranging a wear-resistant lining and a gasket at the nose tip, protects the nose tip while realizing the adjustable distance between the nose tips, effectively prolongs the service life of the guide guard and reduces the number and consumption of spare parts for the guide guard.

[0005] In order to achieve the above technical effects, the utility model adopts the following technical solutions:

[0006] An inlet guide comprises a guide body and a wear-resistant lining, wherein one end of the guide body is provided with two nose tips, the guide body is further provided with two guide wheels, and the wear-resistant lining is detachably arranged on the inner side of the nose tip facing the guide body.

[0007] The wear-resistant lining is composed of an integrally arranged flat portion and a curved portion, the flat portion is located on the side away from the guide wheel, the flat portion has a rectangular cross-section along the extension direction of the guide body, the curved portion has a fan-shaped cross-section along the extension direction of the guide body, and the distance between the two curved portions away from one end of the flat portion is greater than the distance between the two guide wheel axes.

[0008] The imported guide provided by the utility model effectively controls the wear of the nose tip by the steel billet by arranging a wear-resistant lining plate on the inner side of the nose tip, effectively prolongs the service life of the guide guard, and when the wear-resistant lining plate is damaged, only the wear-resistant lining plate needs to be replaced without replacing the entire guide guard; at the same time, the wear-resistant lining plate is provided with a curved surface portion, so that the guide guard can still accurately guide the steel billet when the guide wheel fixing pin is damaged.

[0009] Preferably, the wear-resistant lining is made of 2Cr13 martensitic stainless steel and has good wear resistance.

[0010] Preferably, a gasket is provided between the wear-resistant liner and the nose tip. While reducing the wear on the nose tip, the gasket is used to adjust the distance between the nose tips so that the inlet guide can be suitable for the production needs of steel billets of different specifications.

[0011] Preferably, the thickness of the gasket is 1 mm, 2 mm, 3 mm, 5 mm or other thicknesses required according to production needs.

[0012] Preferably, the gasket is made of a rigid material, and further preferably, the gasket is made of Q235 steel.

[0013] The function of the gasket is to adjust the spacing of the wear-resistant deposits. Therefore, to ensure that the spacing is not affected when the billet enters, the gasket needs to be made of rigid material.

[0014] Preferably, a threaded through hole is provided on the nose tip, and threaded blind holes and through holes are provided on the wear-resistant lining plate and the gasket at positions corresponding to the threaded through hole. The wear-resistant lining plate and the gasket are detachably fixedly connected to the nose tip by bolts, so as to facilitate the replacement of the wear-resistant lining plate and the gasket.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The imported guide provided by the utility model effectively controls the wear of the nose tip by the steel billet by arranging a wear-resistant lining plate on the inner side of the nose tip, thereby effectively extending the service life of the guide. When the wear-resistant lining plate is damaged, only the wear-resistant lining plate needs to be replaced without replacing the entire guide. At the same time, the wear-resistant lining plate is provided with a curved surface portion, so that the bite force of the steel billet can still be provided when the guide wheel fixing pin is damaged.

[0017] 2. By setting gaskets and using them to adjust the distance between the nose tips, the inlet guide can be adapted to the production needs of billets of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the coordination of the wear-resistant liner, gasket and nose tip provided in Example 1;

[0019] Figure 2 is a schematic diagram of the structure of the inlet guide provided in Example 1;

[0020] Among them, 1. guide body; 2. wear-resistant lining; 21. flat surface; 22. curved surface; 3. gasket; 4. bolt; 5. threaded through hole; 6. threaded blind hole; 7. guide wheel; 8. guide wheel fixing pin; 9. guide wheel fixing nut. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Example 1

[0023] like Figure 1-Figure 2 As shown, an inlet guide comprises a guide body 1 and a wear-resistant lining plate 2. Two nose tips are arranged at one end of the guide body 1. Two guide wheels 7 are also arranged on the guide body 1. The guide wheels 7 are arranged on the guide body 1 through guide wheel fixing pins 8 and guide wheel fixing nuts 9. The wear-resistant lining plate 2 is detachably arranged on the inner side of the nose tip facing the guide body 1.

[0024] The wear-resistant lining 2 is composed of an integrally arranged flat portion 21 and a curved portion 22. The flat portion 21 is located on the side away from the guide wheel 7. The cross-section of the flat portion 21 along the extension direction of the guide body 1 is rectangular, and the cross-section of the curved portion 22 along the extension direction of the guide body 1 is fan-shaped. The distance between the two curved portions 22 away from one end of the flat portion is greater than the distance between the axes of the two guide wheels 7.

[0025] In this embodiment, the wear-resistant lining plate 2 is made of 2Cr13 martensitic stainless steel and has good wear resistance.

[0026] A gasket 3 is also provided between the wear-resistant liner 2 and the nose tip. While reducing the wear on the nose tip, the gasket 3 is used to adjust the spacing of the nose tip so that the inlet guide can be suitable for the production needs of billets of different specifications.

[0027] The thickness of the gasket 3 is 1 mm, 2 mm, 3 mm, 5 mm or other thicknesses required according to production needs.

[0028] The gasket 3 is made of a rigid material. In this embodiment, the gasket is made of Q235 steel.

[0029] A threaded through hole 5 is provided on the nose tip, and threaded blind holes 6 and through holes are provided on the wear-resistant lining plate 2 and the gasket 3 at positions corresponding to the threaded through hole 5. The wear-resistant lining plate 2 and the gasket 3 are detachably fixedly connected to the nose tip by bolts 4, so that the wear-resistant lining plate 2 and the gasket 3 can be easily replaced.

Claims

1. An inlet guide, characterized in that: It includes a guide body and a wear-resistant lining plate. One end of the guide body is provided with two nose tips. The guide body is also provided with two guide wheels. The wear-resistant lining plate is detachably arranged on the inner side of the nose tip facing the guide body. The wear-resistant lining is composed of an integrally arranged flat portion and a curved portion, the flat portion is located on the side away from the guide wheel, the flat portion has a rectangular cross-section along the extension direction of the guide body, the curved portion has a fan-shaped cross-section along the extension direction of the guide body, and the distance between the two curved portions away from one end of the flat portion is greater than the distance between the two guide wheel axes.

2. The inlet guide as claimed in claim 1, characterized in that: The wear-resistant lining plate is made of 2Cr13 martensitic stainless steel.

3. The inlet guide as claimed in claim 1, characterized in that: There is also a spacer between the wear liner and the nose tip.

4. The inlet guide as claimed in claim 3, characterized in that: The thickness of the gasket is 1 mm, 2 mm, 3 mm or 5 mm.

5. The inlet guide as claimed in claim 3, characterized in that: The gasket is made of Q235 steel.

6. The inlet guide as claimed in claim 3, characterized in that: A threaded through hole is arranged on the nose tip, and threaded blind holes and through holes are arranged at positions corresponding to the threaded through hole on the wear-resistant lining plate and the gasket respectively.

Images