High-wear-resistance cold roll blank forging process and device

Abstract

The invention discloses a forging process and device for a high-wear-resistance cold roll blank, and belongs to the technical field of cold roll forging, the process method that vertical upsetting is conducted firstly, then a journal is transversely drawn out and formed in a segmented mode is adopted, for vertical upsetting, the journal section of the blank is fixed through a lower clamping sleeve and an upper clamping sleeve, and only a target area is vertically pressed and forged; in the process, a pair of tire mold blocks which are in up-down linkage, can synchronously rotate and perform radial horizontal feeding movement on the shaping mold are adopted to always form a spiral arc-shaped movement track, continuous and uniform radial extrusion is performed on the peripheral wall of the roller body section which is upset step by step, the tire mold orientation effect is achieved, precise thickening forming of the roller body is achieved, and the precision of the roller body is improved. The drum-shaped defect of traditional upsetting is eliminated, for transverse drawing-out, an upset blank is horizontally placed, a pair of tire modules is used for clamping and rotating a roller body section, axial feeding forging is combined, continuous progressive deformation of a journal section is achieved, and a high-wear-resistance forging stock with high density and uniformity is obtained.

Description

Technical Field

[0001] This invention relates to the field of cold rolling roll forging technology, and more specifically, to a forging process and apparatus for high wear-resistant cold rolling roll blanks. Background Technology

[0002] As a key component in the metal processing field, cold rolling rolls operate in a harsh and complex environment. There is high-speed relative sliding between the roll surface and the workpiece (the linear velocity often exceeds 10m / s), accompanied by periodic impact loads, which can easily cause abrasive wear and adhesive wear. Therefore, they are required to have good wear resistance, roughness retention performance, accident resistance, uniformity, and high hardness.

[0003] The core objective of forging is to refine grains and homogenize the microstructure. Through multiple upsetting and drawing processes in a forging press, casting defects are eliminated and mechanical properties are improved. For reference, see the relevant content disclosed in CN118080768B. This patent approximates a cylinder with a curved surface composed of multiple planes. However, cold rolling rolls require a more precise arc surface (such as a parabola or involute). Existing designs may result in tiny sharp edges on the surface after forging, which can easily cause bulging defects and increase the difficulty of subsequent finishing. In particular, it is difficult to apply to a rod-shaped structure that is thick in the middle and thin at both ends.

[0004] To address the practical problems in existing technologies, we propose a forging process and apparatus for high wear-resistant cold rolling roll blanks. Summary of the Invention

[0005] The purpose of this invention is to solve existing practical production problems and to provide a high wear-resistant cold rolling mill blank forging process and apparatus compared with existing technologies.

[0006] The objective of this invention can be achieved through the following technical solution: a high wear-resistant cold rolling mill blank forging device, comprising a forging table, a forming mold and a forging mechanism located above the forming mold, the forming mold comprising a rotating frame driven to be mounted on the forging table, a lower rotating ring being rotatably mounted on the rotating frame via an embedded annular guide rail, an upper rotating ring being mounted on the lower rotating ring via a pair of vertically distributing vertical lifting push rods, and a tire module being horizontally mounted on the inner sides of both the lower and upper rotating rings via a horizontal feed push rod, the tire module being horizontally distributed vertically and horizontally; The bottom of the forging table is equipped with a lower clamping sleeve that is coaxial with the lower rotating ring and is used to limit the lower end journal section of the billet by means of a top support push rod. Above the lower clamping sleeve is an upper clamping sleeve used to limit the upper end journal section of the billet. The forging mechanism includes a pair of supports and a moving platform that is horizontally mounted on the top of the supports. An upsetting component and an elongation component are mounted on both sides of the upsetting component on the moving platform. A frame corresponding to the position of the elongation component is also raised and lowered on both sides of the bottom of the forging platform.

[0007] Furthermore, the lower and upper sleeves have cavities that match the dimensions of the journal section, and each of the lower and upper sleeves has a conical transition cavity that is narrower inside and wider outside at one end.

[0008] Furthermore, each of the pair of tire modules has an arc-shaped extrusion groove on its opposite end wall that matches the target upsetting outer diameter of the roller body section, and the upper tire module moves down synchronously with the billet pressing amount, and its height position corresponds to that of the other tire module.

[0009] Furthermore, the upsetting assembly includes a forging cylinder one fixedly installed on the moving platform, the telescopic end of the forging cylinder one passing through the moving platform and fixedly connected to a flat anvil that is positioned corresponding to the lower sleeve; the drawing assembly includes a forging cylinder two fixedly installed on the moving frame, the telescopic end of the forging cylinder two passing through the moving frame and fixedly connected to a V-shaped anvil.

[0010] This invention also proposes a forging process for high wear-resistant cold-rolled roll blanks, comprising the following steps: S1, one-time vertical upsetting; S2. The furnace is reheated once, and the furnace temperature is controlled at 1050±50℃. The holding time is 4 to 6 hours. Nitrogen gas is circulated in the furnace for protection to reduce the formation of oxide scale.

[0011] S3, Lateral elongation; S4. Secondary reheating: The furnace temperature is controlled at 1000±30℃, and the holding time is 2 to 5 hours. S5, Secondary vertical upsetting; S6. Cooling after forging: Place in a slow cooling pit, fill with hot sand or lime, and cool at a rate of ≤50℃ / h.

[0012] Furthermore, the specific operation of a single vertical upsetting is as follows: S11. Place the cylindrical blank vertically, with the lower end of the blank passing through the forming mold and resting against the lower clamping sleeve, and the top of the blank fixed by the upper clamping sleeve. S12. The flat anvil on the forging mechanism presses down the forging billet multiple times at a preset speed, and the height of the roller body section is gradually compressed downward. The forging temperature is between 1050℃ and 1150℃. S13. In this process, a pair of tire modules rotate circumferentially at a preset speed along the roller body section. The pair of tire modules move radially outward at a preset speed to maintain contact pressure with the roller body section. At the same time, the upper tire module moves downward synchronously with the pressing amount. When the outer diameter of the roller body section reaches the target value, the position of the pair of tire modules is maintained, and the flat anvil is lightly pressed (≤5MPa).

[0013] Furthermore, the specific steps for lateral elongation are as follows: S31. After being returned to the furnace, the billet is placed vertically against the lower jacket and then held by a pair of forging cylinders and two pairs of rollers. The forming mold is rotated to change the billet from a vertical state to a horizontal state, and a pair of frame supports and a pair of journal sections are lifted horizontally upward. S32. A pair of V-shaped anvils on the forging mechanism press down to radially compress the journal section, while a pair of jig modules clamp the blank and rotate it circumferentially. During multiple pressing processes, the V-shaped anvils push upward to adapt to the horizontal height of the journal section after the gradual reduction in diameter, thus completing the continuous and gradual reduction in diameter deformation of the journal section.

[0014] Furthermore, the specific operation of the secondary vertical upsetting is as follows: S51. Use a lower and upper sleeve with the same inner diameter as the elongated journal section for upper and lower positioning. S52. The flat anvil on the forging mechanism presses down on the forging billet multiple times at a preset speed, and the height of the roller body is gradually compressed downwards twice. The forging temperature is between 1000℃ and 1030℃. S52. In this process, a pair of tire modules rotate and move radially outward along the roller body at a preset speed, maintaining contact pressure with the roller body. The upper tire module moves down synchronously with the pressure reduction until the height of the upper and lower tire modules are level, and the outer diameter of the roller body reaches the secondary target value.

[0015] Compared with the prior art, the advantages of this invention are: 1. The process involves vertical upsetting followed by transverse elongation of the journal in a segmented forming process. For the vertical upsetting process, the journal segments of the billet are fixed vertically using a lower and upper clamping sleeve. Only the target area is subjected to vertical pressure forging to prevent deformation of the journal area. In this process, a pair of vertically linked and synchronously rotating die modules on the forming mold continuously and uniformly extrudes the outer wall of the gradually upsetting roller body in a spiral arc motion trajectory, which plays a die orientation role and achieves precise thickening and forming of the roller body, eliminating the bulging defects of traditional upsetting. For the transverse elongation of the journal, the upsetting billet is placed horizontally, and the roller body segments are clamped and rotated by a pair of die modules. Combined with axial feed forging, the journal segments are continuously and gradually deformed to obtain a high-density, high-uniformity, and high-wear-resistant forging billet.

[0016] 2. Based on the multi-directional forging process, repeated upsetting and drawing can refine the grains and enhance uniformity. With the help of precise heating and slow cooling control, the original cast structure is completely broken, internal defects are welded together, the grains are refined, and the composition and properties are homogenized. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure at the junction of the shaping mold and the upper and lower clamping sleeves of the present invention. Figure 3 This is a schematic diagram of the structure of the upper and lower jackets of the present invention when they limit the upper and lower positions of the billet; Figure 4 This is a schematic diagram of the structure of the present invention when vertically upsetting and expanding the diameter of a billet; Figure 5 This is a schematic diagram of the structure of the present invention when the upsetting and expanding billet is taken out upwards; Figure 6 This is a schematic diagram of the structure of the present invention when the billet after reheating is placed back into the shaping mold; Figure 7 This is a schematic diagram of the structure of the forming mold of the present invention when clamping the blank roller section; Figure 8 This is a schematic diagram of the structure of the present invention when the journal section of the blank is laterally elongated and reduced in diameter; Figure 9 This is a schematic diagram of the overall structure of the present invention after the lateral elongation process is completed; Figure 10 This is a schematic diagram of the structure at the junction of the billet and the forming mold after the transverse elongation process is completed according to the present invention. Figure 11 This is a flowchart of the process method of the present invention.

[0018] Explanation of the labels in the diagram: 1. Forging table; 2. Rotary frame; 3. Circular electric guide rail; 4. Lower rotating ring; 5. Upper rotating ring; 6. Vertical lifting push rod; 7. Tire module; 8. Lateral feed push rod; 9. Top support push rod; 10. Lower jacket; 11. Upper jacket; 12. Billet; 121. Journal section; 122. Roller section; 13. Support; 14. Moving table; 15. Forging cylinder one; 16. Flat anvil; 17. Forging cylinder two; 18. V-shaped anvil; 19. Frame; 20. Lifting cylinder. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Example 1: This invention relates to a high wear-resistant cold rolling mill blank forging device. Please refer to [link / reference]. Figures 1-2It includes a forging table 1, a forming mold and a forging mechanism located above the forming mold. The forming mold includes a rotating frame 2 driven to rotate on the forging table 1. A lower rotating ring 4 is rotatably mounted on the rotating frame 2 by means of an embedded annular guide rail 3. The lower rotating ring 4 is mounted on a pair of vertically lifting push rods 6 distributed front and rear, and the upper rotating ring 5 is mounted on the same axis. The inner sides of the lower rotating ring 4 and the upper rotating ring 5 are mounted on the lateral extension and retraction of the tire module 7 through the lateral feed push rod 8. The pair of tire modules 7 are staggered vertically and horizontally. The opposite end walls of the pair of tire modules 7 are provided with arc-shaped extrusion grooves that match the target upsetting outer diameter of the roller body section 122. The upper tire module 7 moves down synchronously with the blank 12 as it is pressed down, and its height position corresponds to that of the other tire module 7.

[0021] Please see Figure 3 The lower sleeve 10 and the upper sleeve 11 have cavities inside that match the size of the journal section 121. The lower sleeve 10 and the upper sleeve 11 each have a conical transition cavity that is narrow inside and wide outside that is connected to the cavity. The lower sleeve 10 and the upper sleeve 11 are used to limit the journal section 121 on the blank 12. The lower sleeve 10 is fixed and lifted by the top support push rod 9. The height of the billet 12 is adjusted according to the height of the billet 12. The upper sleeve 11 is directly sleeved on the upper end of the billet 12. The lower sleeve 10 and the upper sleeve 11 respectively sleeve and protect the upper and lower ends of the billet 12. The two ends form a journal section 121 that does not deform during the upsetting and diameter expansion process. The lower sleeve 10 and the upper sleeve 11 are designed with conical chamfers on opposite edges to promote metal flow. After one vertical upsetting, a transition zone step is formed between the journal section 121 and the roll body section 122.

[0022] Please see Figure 1 In the initial state, a pair of jig modules 7 are matched vertically according to the height distance between the lower jacket 10 and the upper jacket 11. The pair of jig modules 7 are spatially symmetrically distributed. During the upsetting and diameter expansion process of the roll body section 122, a sufficient compression ratio is ensured to eliminate porosity defects in the cast structure and improve density. Please refer to [link to relevant documentation]. Figure 4 While the pair of tire modules 7 move radially, the axial height of the upper tire module 7 expands synchronously, always covering the current height of the roller body section 122. Through the radial feed and axial distribution optimization of the tire modules 7, the roller body section 122 is uniformly deformed, avoiding local stress concentration.

[0023] Please see Figures 4-10The forging mechanism includes brackets 13 fixed on the left and right sides of the forging table 1. A moving table 14 is installed between the tops of the pair of brackets 13 and moves horizontally back and forth. An upsetting component and an elongation component are installed on the moving table 14. Electric guide rails for moving the moving table 14 horizontally back and forth are embedded on the opposite end walls of the top of the pair of brackets 13. A pair of elongation components are movably installed on the moving table 14 through the moving frame. The moving table 14 can move back and forth. When placing the billet 12, the moving table 14, together with the upsetting component and the elongation component, can be moved backward to make room for taking out and placing the billet 12.

[0024] The upsetting assembly includes a forging cylinder 15 fixedly installed on the moving table 14. The telescopic end of the forging cylinder 15 passes through the moving table 14 and is fixedly connected to a flat anvil 16 that is positioned corresponding to the lower sleeve 10. The drawing assembly includes a forging cylinder 17 fixedly installed on the moving frame. The telescopic end of the forging cylinder 17 passes through the moving frame and is fixedly connected to a V-shaped anvil 18. On both sides of the bottom of the forging table 1, there are also lifting cylinders 20 that lift and install frame 19 corresponding to the position of the drawing component. The flat anvil 16 is used for vertical upsetting operation. A pair of V-shaped anvils 18 are distributed on the left and right. After the upsetting operation, the billet 12 is placed horizontally. The pair of V-shaped anvils 18 correspond to the positions of the journal sections 121 on the left and right sides. When performing transverse drawing, the pair of frame 19 is lifted outward to support the journal sections 121. The journal sections 121 are transversely drawn using the V-shaped anvils 18. During this process, the roller body section 122 is limited to the space between a pair of jig modules 7. The pair of jig modules 7 drive the billet 12 to rotate circumferentially, and the journal sections 121 are continuously and gradually reduced in diameter and deformed.

[0025] Example 2: This invention also proposes a forging process for high wear-resistant cold-rolled roll blanks. Please refer to [link / reference]. Figure 11 It includes the following steps: S1, one-time vertical upsetting; S11. The cylindrical blank 12 is placed vertically, with the lower end of the blank 12 passing through the forming mold and abutting against the lower clamping sleeve 10, and the top of the blank 12 is fixed by the upper clamping sleeve 11. S12, the flat anvil 16 on the forging mechanism presses down the forging billet 12 multiple times at a preset speed, the height of the roller section 122 is gradually compressed downward, and the forging temperature is between 1050℃ and 1150℃. S13. In this process, a pair of tire modules 7 rotates in a circular motion at a preset speed along the roller body section 122. The pair of tire modules 7 moves radially outward at a preset speed to maintain the contact pressure with the roller body section 122. At the same time, the upper tire module 7 moves downward synchronously with the pressing amount. When the outer diameter of the roller body section 122 reaches the target value, the position of the pair of tire modules 7 is maintained, and the flat anvil 16 presses lightly (≤5MPa) to eliminate surface ripples. S2. First reheating: The furnace temperature is controlled at 1050±50℃, and the holding time is 4 to 6 hours. Nitrogen gas is circulated in the furnace for protection to reduce the formation of oxide scale.

[0026] S3, Lateral elongation; S31. The billet 12 after being returned to the furnace is placed vertically again against the lower jacket 10, and then clamped by the circumferential walls of the roller body section 122 of the pair of forging cylinders 17. The lower jacket 10 is retracted downwards, and the forming mold is rotated so that the billet 12 changes from a vertical state to a horizontal state. The pair of brackets 19 are raised horizontally upwards to support the pair of journal sections 121. S32. A pair of V-shaped anvils 18 on the forging mechanism press down to radially compress the journal section 121. At the same time, a pair of jig modules 7 clamp the blank 12 and rotate it in a circular motion. During multiple pressing processes, the V-shaped anvils 18 push upward to adapt to the horizontal height of the journal section 121 after the gradual reduction in diameter, thus completing the continuous and gradual reduction in diameter deformation of the journal section (121). S4. Secondary reheating: The furnace temperature is controlled at 1000±30℃, and the holding time is 2 to 5 hours. S5, Secondary vertical upsetting; S51. The lower sleeve 10 and upper sleeve 11, which are the same size as the inner diameter of the elongated journal section 121, are used for upper and lower positioning. The flat anvil 16 on the forging mechanism presses down the forging blank 12 multiple times at a preset speed. The height of the roller section 122 is gradually compressed downwards twice. The forging temperature is between 1000℃ and 1030℃. S52. In this process, a pair of tire modules 7 rotate and move radially outward along the roller body section 122 at a preset speed, maintaining contact pressure with the roller body section 122. The upper tire module 7 moves down synchronously with the pressing amount until the height of the upper and lower pair of tire modules 7 is level. The outer diameter of the roller body section 122 reaches the secondary target value. The secondary upsetting is to eliminate the clamping deformation of the roller body section during transverse elongation and to further refine the grains and enhance uniformity. S6. Post-forging cooling: Place in a slow cooling pit filled with hot sand or lime, with a cooling rate ≤50℃ / h, or directly put into the furnace for isothermal annealing after forging (e.g., holding at 700℃ for 20 hours). Post-forging cooling requires slow cooling to prevent stress cracking.

[0027] In summary, the process of vertical upsetting followed by transverse elongation of the journal in segmented forming is adopted. For the vertical upsetting process, the lower clamp 10 and the upper clamp 11 are used to fix the journal segment 121 of the billet 12 in the vertical direction. Only the target area is subjected to vertical pressure forging to prevent deformation of the journal area. In this process, a pair of upper and lower linkage and synchronously rotating, radially horizontal feed mold 7 on the forming mold continuously and uniformly extrudes the outer peripheral wall of the gradually upsetting roller segment 122 in a spiral arc motion trajectory, which plays the role of mold orientation, realizes the precision thickening and forming of the roller body, and eliminates the drum-shaped defects of traditional upsetting. For the journal transverse elongation process, the upset billet 12 is placed horizontally and clamped and rotated by a pair of rollers 122 of a pair of jig modules 7. Combined with axial feed forging, the journal section 121 is continuously and progressively deformed. Repeated upsetting and drawing can refine the grains and enhance uniformity. With precise heating and slow cooling control, a high-density, high-uniformity, and high-wear-resistant forging billet is obtained.

[0028] The above description represents only preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and improved concepts of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high wear-resistant cold rolling mill blank forging device, comprising a forging table (1), characterized in that: The forging table (1) is equipped with a forming mold and a forging mechanism located above the forming mold. The forming mold includes a rotating frame (2) driven to be mounted on the forging table (1). A lower rotating ring (4) is mounted on the rotating frame (2) by means of an embedded ring guide rail (3). An upper rotating ring (5) is mounted on the lower rotating ring (4) by means of a pair of vertical lifting push rods (6) distributed in front and behind. Tire modules (7) are horizontally mounted on the inner sides of the lower rotating ring (4) and the upper rotating ring (5) by means of a horizontal feed push rod (8). Tire modules (7) are horizontally distributed in a staggered manner, with the upper and lower rings (4) and the upper rotating ring (5) arranged in a staggered manner, with the upper and lower rings (4) and the left and right rings ... upper rotating ring (5) arranged in a staggered manner, with the upper and lower rings (4) and the left and right rings (5) (4) and the upper and lower rings (5) (4) respectively. The forging table (1) is equipped with a lower sleeve (10) which is coaxially arranged with the lower rotating ring (4) and used to limit the lower end journal section (121) of the blank (12) by a top support push rod (9) at the bottom. An upper sleeve (11) is provided above the lower sleeve (10) to limit the upper end journal section (121) of the blank (12). The forging mechanism includes a pair of supports (13) and a moving platform (14) that is horizontally mounted on the top of the supports (13). The moving platform (14) is equipped with an upsetting component and an elongation component mounted on both sides of the upsetting component. The bottom sides of the forging table (1) are also equipped with a frame (19) that corresponds to the position of the elongation component.

2. The high wear-resistant cold rolling mill blank forging device according to claim 1, characterized in that: The lower sleeve (10) and the upper sleeve (11) have cavities inside that match the size of the journal section (121), and the lower sleeve (10) and the upper sleeve (11) each have a conical transition cavity that is narrow inside and wide outside at opposite ends.

3. The high wear-resistant cold rolling mill blank forging device according to claim 1, characterized in that: Both of the pair of tire modules (7) have arc-shaped extrusion grooves on their opposite end walls that match the target upsetting outer diameter of the roller body section (122), and the upper tire module (7) moves down synchronously with the amount of blank (12) pressing down, and its height position corresponds to that of the other tire module (7).

4. The high wear-resistant cold rolling mill blank forging device according to claim 1, characterized in that: The upsetting assembly includes a forging cylinder one (15) fixedly installed on the moving platform (14). The telescopic end of the forging cylinder one (15) passes through the moving platform (14) and is fixedly connected to a flat anvil (16) that is positioned corresponding to the lower clamp (10). The drawing assembly includes a forging cylinder two (17) fixedly installed on the moving frame. The telescopic end of the forging cylinder two (17) passes through the moving frame and is fixedly connected to a V-shaped anvil (18).

5. A forging process for high wear-resistant cold-rolled roll blanks, employing a forging device for high wear-resistant cold-rolled roll blanks as described in any one of claims 1-4, characterized in that: Includes the following steps: S1, one-time vertical upsetting; S2. One-time reheating in the furnace, with the furnace temperature controlled at 1050±50℃ and the holding time at 4 to 6 hours. Nitrogen gas is purged into the furnace for protection to reduce oxide scale formation. S3, Lateral elongation; S4. Secondary reheating: The furnace temperature is controlled at 1000±30℃, and the holding time is 2 to 5 hours. S5, Secondary vertical upsetting; S6. Cooling after forging: Place in a slow cooling pit, fill with hot sand or lime, and cool at a rate of ≤50℃ / h.

6. The forging process for high wear-resistant cold-rolled roll blanks according to claim 5, characterized in that: The specific steps for a single vertical upsetting operation are as follows: S11. The cylindrical blank (12) is placed vertically, with the lower end of the blank (12) passing through the forming mold and abutting against the lower clamping sleeve (10), and the top of the blank (12) is fixed by the upper clamping sleeve (11). S12, the flat anvil (16) on the forging mechanism presses down the forging billet (12) multiple times at a preset speed, the height of the roller section (122) is gradually compressed downward, and the forging temperature is between 1050℃ and 1150℃; S13. In this process, a pair of tire modules (7) rotates in a circular motion at a preset speed along the roller body section (122). The pair of tire modules (7) moves radially outward at a preset speed to maintain the contact pressure with the roller body section (122). At the same time, the upper tire module (7) moves down synchronously with the amount of pressure. When the outer diameter of the roller body section (122) reaches the target value, the position of the pair of tire modules (7) is maintained, and the flat anvil (16) applies light pressure (≤5MPa).

7. The forging process for high wear-resistant cold-rolled roll blanks according to claim 5, characterized in that: The specific steps for lateral elongation are as follows: S31. The billet (12) after being returned to the furnace is placed vertically against the lower jacket (10), and then held by the two pairs of forging cylinders (17) and the roller body section (122) of the roller body section (122). The forming mold is rotated so that the billet (12) changes from a vertical state to a horizontal state, and the pair of horse frame (19) is lifted horizontally upward to support the pair of journal sections (121). S32. A pair of V-shaped anvils (18) on the forging mechanism press down to radially compress the journal section (121), while a pair of jig modules (7) clamp the blank (12) and rotate it in a circle. During multiple pressing processes, the V-shaped anvils (18) push upward to adapt to the horizontal height of the journal section (121) after the gradual reduction in diameter, thus completing the continuous and gradual reduction in diameter deformation of the journal section (121).

8. The forging process for high wear-resistant cold-rolled roll blanks according to claim 6, characterized in that: The specific steps for secondary vertical upsetting are as follows: S51. Use a lower sleeve (10) and an upper sleeve (11) with the same inner diameter as the elongated journal section (121) for upper and lower positioning; S52, the flat anvil (16) on the forging mechanism presses down the forging billet (12) multiple times at a preset speed, and the height of the roller body section (122) is gradually compressed downwards twice, with the forging temperature between 1000℃ and 1030℃. S52. In this process, a pair of tire modules (7) rotate and move radially outward along the roller section (122) at a preset speed, maintaining contact pressure with the roller section (122). The upper tire module (7) moves down synchronously with the pressure until the height of the upper and lower pair of tire modules (7) is level, and the outer diameter of the roller section (122) reaches the secondary target value.

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