Manufacturing method of roller thrust ring blank

Abstract

The invention discloses a manufacturing method of a roller thrust ring blank, and belongs to the technical field of roller manufacturing, steel plates or steel pipes are assembled and welded to form the thrust ring blank comprising a sealing part and a flange part, and the specific working process comprises blanking, rolling, assembling and welding; a sealing part of the roller thrust ring blank is rolled and welded by a steel plate, and a flange part is welded by three ring plates; or the sealing part of the roller thrust ring blank adopts a seamless steel pipe, and the flange part is welded by four ring plates. The thrust ring blank comprising the sealing part and the flange part is formed by welding the steel plates or the steel pipes in pairs, the size, the hardness and the appearance quality of the thrust ring finished product manufactured after welding meet the technical requirements, the welded blank can replace a conventional thrust ring cast or forged blank, and the production time of the roller thrust ring blank is greatly shortened.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical rollers, in particular to a method for manufacturing a roller thrust ring blank. Background Art

[0002] Rollers are important components that cause plastic deformation of metal during the steel rolling process. Most rollers need to be equipped with thrust rings, labyrinth rings, thrust rings and other accessories (hereinafter collectively referred to as thrust rings). The main functions of this type of thrust ring are to locate bearings, seal, and waterproof. The overall appearance characteristics are: the overall width is 110-220㎜, the length of the outer circle sealing part varies from 50-150㎜; the inner diameter is 300-720㎜ (the main batch is concentrated in 300-550㎜), the thickness of the positioning part is about 20-35㎜; the height difference between the matching diameter and the maximum outer circle is 65-120㎜, mainly concentrated in 75-100㎜.

[0003] The existing thrust ring blanks are formed by integral casting or forging. When processed into thrust rings, in addition to quenching and tempering (quenching and tempering hardness HSD30-40), surface quenching treatment is also required, and the quenching hardness is HSD65-75, which is not only costly but also has a long production cycle. Due to environmental protection requirements, the number of outsourced manufacturers of thrust rings formed by casting or forging has decreased, and the supply of blanks is insufficient. In addition, due to the increase in roller production, the delivery of thrust ring blanks on schedule has become a bottleneck, which has seriously restricted the delivery progress of rollers.

[0004] In order to expand the production channels of thrust ring blanks and solve the current problem of roller delivery schedule, it is necessary to develop a method for manufacturing roller thrust ring blanks. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method for manufacturing a roller thrust ring blank, which adopts steel plates or steel pipes to weld together to form a thrust ring blank including a sealing part and a flange part. The finished thrust ring size, hardness and appearance quality of the thrust ring after welding meet the technical requirements, and the welded blank can replace the conventional thrust ring casting or forging blank.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A method for manufacturing a roller thrust ring blank comprises the following steps: using steel plates or steel pipes to assemble and weld the thrust ring blank including a sealing part and a flange part; the working process comprises cutting, rolling, assembling and welding.

[0007] The further improvement of the technical solution of the present invention is that the sealing part of the roller thrust ring blank is rolled into a round tube with steel plates and welded, and the flange part is welded into a first circular ring body with three ring plates; the circular tube and the first circular ring body are welded to form the thrust ring blank.

[0008] The further improvement of the technical solution of the present invention is that the sealing part of the roller thrust ring blank adopts a seamless steel pipe, and the flange part adopts four ring plates welded into a second annular body; the seamless steel pipe and the second annular body are welded to form the thrust ring blank.

[0009] A further improvement of the technical solution of the present invention is that multiple layers and multiple passes of welds are required during welding, and defects such as lack of fusion, pores, and slag inclusions are strictly prohibited between welds. The welds should be tightly combined without uneven defects.

[0010] A further improvement of the technical solution of the present invention is that the mass ratio between the weight of the roller thrust ring blank and the net weight of the finished roller thrust ring is 2 to 3.

[0011] A further improvement of the technical solution of the present invention is that the maximum outer circle of the flange part of the roller thrust ring blank, the outer circle of the sealing part, the flange part and the inner hole of the sealing part all have a processing allowance of 10 to 20 mm.

[0012] A further improvement of the technical solution of the present invention is that the material of the roller thrust ring blank is 45 steel or 42CrMo.

[0013] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is: The present invention adopts steel plates or steel pipes to weld together to form a thrust ring blank including a sealing part and a flange part. The finished thrust ring produced after welding has dimensions, hardness and appearance quality that meet technical requirements. The welded blank can replace conventional cast or forged thrust ring blanks, thereby reducing the production cycle of the thrust ring blank, expanding the production channels of the thrust ring blank, and solving the current problem of the delivery schedule of rolling mill rolls. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. Figure 1 1 is a schematic diagram of the structure of a roller thrust ring blank in an embodiment of the present invention; Figure 2 1 is a schematic diagram of the steel plate rolling and welding assembly structure in an embodiment of the present invention; Figure 3 1 is a schematic diagram of a seamless steel pipe welding assembly structure in an embodiment of the present invention; Among them, 1. thrust ring body; 2. thrust ring blank; 3. welding part; 4. steel plate rolling; 5. ring plate; 6. seamless steel pipe; 7. weld. DETAILED DESCRIPTION

[0015] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatus.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0017] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0018] The present invention is further described in detail below with reference to the accompanying drawings and embodiments: like Figure 1-3 As shown, a method for manufacturing a roller thrust ring blank is to use steel plates or steel pipes to form a thrust ring blank 2 by welding. The specific work process includes cutting, rolling, assembly and welding. The thrust ring blank includes a sealing part and a flange part. The flange part and the sealing part are welded together through a welding part 3 to ensure that the thrust ring blank after assembly passes through welding without flaw detection and other appearance defects. Figure 1 As shown, the thrust ring blank 2 can be processed into the thrust ring body 1. The common materials of the steel plate or steel pipe are 45 steel and 42CrMo.

[0019] Furthermore, the sealing part of the roller thrust ring blank is rolled 4 into a round tube using steel plates and welded, and the flange part is welded into a first round ring body using three ring plates 5; the round tube and the first round ring body are welded together to form the thrust ring blank 2. Figure 2 As shown, when the steel plate 4 is rolled into a round tube and welded, a weld seam 7 is formed, and when three ring plates 5 are welded into a circular ring body, three weld seams 7 are formed.

[0020] Specifically, the steel plate is rolled into 4 circular tubes as the sealing part, and the flange part is formed by a first circular ring body welded by three ring plates 5 on the outside of the bottom end of the steel plate rolled into 4 circular tubes, and the bottom end of the steel plate rolled into 4 circular tubes is welded together with the inner ring of the first circular ring body formed by three ring plates 5.

[0021] Furthermore, the sealing part of the roller thrust ring blank is made of seamless steel pipe 6, and the flange part is made of four ring plates 5 welded into a second annular body; the seamless steel pipe 6 and the second annular body are welded to form the thrust ring blank 2. Figure 3 As shown, four weld seams 7 are formed when four ring plates 5 are welded to form a circular ring.

[0022] Specifically, the seamless steel pipe 6 serves as a sealing part, and the outer side of the bottom end of the seamless steel pipe 6 is welded by four ring plates 5 to form a second annular body to form a flange part, and the bottom end of the seamless steel pipe 6 is welded to the inner ring of the second annular body formed by the four ring plates 5.

[0023] Furthermore, during welding, both the weld 7 and the welding part 3 require multiple layers and multiple passes of welds. It is strictly forbidden to have defects such as lack of fusion, pores, slag inclusions, etc. between welds. The welds should be tightly combined without uneven defects.

[0024] Furthermore, the mass ratio between the weight of the roller thrust ring blank and the net weight of the finished roller thrust ring is 2 to 3.

[0025] Furthermore, the maximum outer circle of the flange part of the roller thrust ring blank, the outer circle of the sealing part, the inner hole of the flange part and the sealing part all have a processing allowance of 10 to 20 mm.

[0026] Furthermore, the material of the roller thrust ring blank is 45 steel or 42CrMo.

[0027] A specific process flow of a method for manufacturing a roller thrust ring blank includes: Step 1: The process personnel formulate a splicing plan based on the thrust ring delivery drawing and design the thrust ring blank assembly plan; Step 2: Before cutting, check the thrust ring blank drawing according to the thrust ring production drawing to ensure that each part has a 10-20mm machining allowance; Step 3: The cutting groove should not be less than the size required by the drawing. After cutting, perform self-inspection and make a qualified mark.

[0028] Step 4: Before assembly, carefully read the original drawing of the thrust ring and the assembly drawing of the thrust ring blank, and consider the assembly plan in advance; Step 5, weld the thrust ring blank according to the drawing requirements, and check whether the groove size meets the welding requirements before welding.

[0029] Step 6: For groove welds that do not require NDT, pay attention to ensuring the welding quality at the root of the groove. Defects such as lack of fusion and slag inclusion are strictly prohibited.

[0030] Step 7: For multi-layer and multi-pass welds, defects such as lack of fusion, porosity, and slag inclusion are strictly prohibited between welds. The welds should be tightly combined without uneven defects.

[0031] By tracking the use of more than 200 roller thrust rings produced by the roller thrust ring blank manufacturing method provided by the present invention, it was found that the finished thrust ring product size, hardness and appearance quality after welding met the technical requirements, and the welded thrust ring blank can replace the conventional thrust ring casting or forging blank.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a roller thrust ring blank, characterized in that: A thrust ring blank (2) including a sealing part and a flange part is formed by assembling and welding steel plates or steel pipes. The specific working process includes cutting, rolling, assembling and welding.

2. The method for manufacturing a roller thrust ring blank according to claim 1, characterized in that: The sealing part of the roller thrust ring blank is rolled (4) into a round tube using steel plates and then welded, and the flange part is welded into a first circular ring body using three ring plates (5); the circular tube and the first circular ring body are assembled and welded to form the thrust ring blank (2).

3. The method for manufacturing a roller thrust ring blank according to claim 1, characterized in that: The sealing part of the roller thrust ring blank is made of a seamless steel pipe (6), and the flange part is made of four ring plates (5) welded into a second annular body; the seamless steel pipe (6) and the second annular body are welded together to form the thrust ring blank (2).

4. A method for manufacturing a roller thrust ring blank according to any one of claims 1 to 3, characterized in that: Welding requires multiple layers and multiple passes of welds. Incomplete fusion, porosity, and slag inclusion defects are strictly prohibited between welds. The welds should be tightly combined without uneven defects.

5. A method for manufacturing a roller thrust ring blank according to any one of claims 1 to 3, characterized in that: The mass ratio between the weight of the roller thrust ring blank and the net weight of the finished roller thrust ring is 2 to 3.

6. A method for manufacturing a roller thrust ring blank according to any one of claims 1 to 3, characterized in that: The maximum outer circle of the flange part of the roller thrust ring blank, the outer circle of the sealing part, the flange part and the inner hole of the sealing part all have a processing allowance of 10 to 20 mm.

7. A method for manufacturing a roller thrust ring blank according to any one of claims 1 to 3, characterized in that: The material of the roller thrust ring blank is 45 steel or 42CrMo.

Images