Round billet hot centering device and centering method

Abstract

The present invention discloses a round billet heat centering device and centering method, comprising a punching machine and upper and lower rollers provided on the punching machine, wherein the upper and lower rollers provided on the punching machine are in contact with the round billet, a pusher is provided on the side of the round billet away from the punching machine, a base is provided at the front end of the pusher, a conical pressure head is provided on the base, and a circumferential groove is formed on the outer surface of the conical pressure head in the longitudinal direction, a first supporting assembly is provided on the side of the round billet away from the pusher head, the first supporting assembly is arranged at intervals, and a second supporting assembly is provided on the side of the round billet adjacent to the pusher head, the second supporting assembly being provided above and below and in contact with the round billet. Since the present invention performs heat centering during the process of rolling the round billet by the punching machine, the round billet will not suffer temperature loss, and the traditional heat centering device is omitted, thereby reducing costs.

Description

Technical Field

[0001] The invention belongs to the technical field of steel pipe production, and particularly relates to a round billet hot centering device and a centering method. Background Art

[0002] In steel pipe production, the round billet hot centering machine punches holes on the end face of the round billet after it is heated. The purpose of centering the tail end of the round billet is to eliminate the annular burr generated at the tail end of the billet during punching, so as to facilitate the insertion of the mandrel before rolling and improve the inner surface quality of the steel pipe and the service life of the mandrel. It can also prevent defects such as "ears" at the tail end of the billet and avoid jamming accidents after punching.

[0003] Traditionally, hot centering is located at the end of the piercing stage. The tube is transported by a conveyor roller to the hot centering station. After centering by the centering machine, the tube is then transported by a conveyor roller to the front end of the piercing machine and flipped into the receiving trough for piercing and rolling. This method solves the need for tube centering, but it also reduces the tube temperature, creating process difficulties for the subsequent piercing and tube rolling mills. Furthermore, traditional hot centering equipment is expensive, increasing rolling costs.

[0004] In view of the above factors, a round billet heat centering device and centering method are specially designed. Since the heat centering is performed during the round billet rolling process of the piercing machine, the round billet will not have temperature loss, and the traditional heat centering device is omitted, thereby reducing costs. Summary of the Invention

[0005] The object of the present invention is to provide a round blank hot centering device and a centering method to solve the problems raised in the above background technology.

[0006] The object of the present invention is achieved through the following technical solution: a round billet heat centering device, comprising a piercing machine and an upper roller and a lower roller provided on the piercing machine, wherein the upper roller and the lower roller provided on the piercing machine are in contact with and cooperate with the round billet, a pusher is provided on one end of the round billet away from the piercing machine, a base is provided at the front end of the pusher, a conical pressure head is provided on the base, and a circumferential groove is formed on the outer surface of the conical pressure head in the longitudinal direction;

[0007] A first supporting assembly is provided on the side of the round blank away from the pusher, and the first supporting assemblies are arranged at intervals. A second supporting assembly is provided on the side of the round blank adjacent to the pusher, and the second supporting assembly is provided above and below to contact the round blank.

[0008] Furthermore, circumferential grooves with a width of 2mm-3mm and a depth of 0.5mm-1mm are machined every 5mm-10mm in the longitudinal direction of the outer surface of the conical indenter.

[0009] Furthermore, the first supporting assembly includes a movable rolling member and a positioning rolling member, the movable rolling member and the positioning rolling member are arranged at intervals, the movable rolling member can move on the round blank, the moving interval is 20-50 cm, and the movable rolling member is a movable squeezing roller structure;

[0010] The positioning rolling parts are symmetrically arranged up and down, and the positioning rolling parts adopt a guide roller structure.

[0011] Furthermore, the second supporting assembly is arranged at a horizontal guide gap position corresponding to the punching machine, and the horizontal guide gap distance is controlled to be 50-70 cm;

[0012] The second supporting assembly is symmetrically arranged up and down and contacts the circumferential surface of the round blank.

[0013] Furthermore, the second supporting component includes a positioning end, which is L-shaped as a whole, and a positioning cavity sleeve is fixedly provided on the positioning end, a positioning mechanism is movably provided in the positioning cavity sleeve, a limiting groove is provided on one side of the positioning mechanism, and a limiting column is provided on the end surface of the positioning end to cooperate with the limiting groove;

[0014] One end of the positioning cavity sleeve is connected to the screw cavity sleeve, and the end of the screw cavity sleeve is fixed and flush with the positioning cavity sleeve.

[0015] Furthermore, a movable sleeve rod is provided in the screw cavity sleeve, and a tilting pin is fixedly provided on the movable sleeve rod. The tilting angle of the tilting pin is the same as the angle of the positioning matching hole provided on the positioning mechanism.

[0016] Furthermore, the end of the screw cavity sleeve is connected to the telescopic output end of the electric telescopic cylinder through a screw, and the telescopic distance of the telescopic output end of the cylinder is the same as the fitting depth between the front end of the tilt pin and the positioning fitting hole.

[0017] Furthermore, the positioning mechanism is a positioning block structure, the positioning block structure is provided with a positioning convex plate, and the positioning convex plate is a trapezoidal structure;

[0018] The positioning convex plate cooperates with a detachable supporting end sleeved on the outer end of the positioning cavity sleeve.

[0019] Furthermore, the detachable supporting end is provided with a positioning groove that cooperates with the positioning convex plate;

[0020] The detachable support end is provided with a hollow rectangular structure;

[0021] The lower end of the detachable supporting end is provided with a connecting column that cooperates with the positioning end.

[0022] A method for hot centering a round billet comprises the following steps:

[0023] When the pusher pushes the round billet to contact the upper and lower rollers of the piercing machine, the round billet is blocked. The pusher head at the front end of the pusher is equipped with a conical pressure head to form an extrusion pressure with the end face of the billet. At this time, the front end of the round billet is sucked in by the upper and lower rollers rotating at a low speed. The billet rotates forward slowly with the rollers, and the rear end of the billet is pushed by the forward-moving pusher. The conical pressure head on the pusher head at the front end of the pusher moves forward with the pusher at the same time. The conical pressure head pushes out a hole in the middle of the tail end face of the billet that is rotating forward. After centering, the billet is directly rolled at high speed by the piercing machine. The pusher retreats, and the cooling water passing through the nozzle cools the conical pressure head at the front end of the pusher head.

[0024] Wherein, as the round billet rotates forward slowly with the rolling roller, the round billet is centered and straightened by a second supporting assembly provided on the side of the round billet adjacent to the pushing head, and the second supporting assembly is provided with upper and lower portions in contact with the round billet;

[0025] The second supporting component includes a positioning end, which is L-shaped as a whole, and a positioning cavity sleeve is fixedly provided on the positioning end, a positioning mechanism is movably provided in the positioning cavity sleeve, a limiting groove is provided on one side of the positioning mechanism, and a limiting column is provided on the end surface of the positioning end to cooperate with the limiting groove;

[0026] The detachable supporting end cooperates with the outer end of the positioning cavity sleeve, and a positioning groove cooperating with the positioning convex plate is provided on the detachable supporting end, and a connecting column cooperating with the positioning end is provided at the lower end of the detachable supporting end.

[0027] Wherein, a first supporting assembly is provided on the side of the round blank away from the pusher, the first supporting assembly comprising a movable rolling part and a positioning rolling part, the movable rolling part and the positioning rolling part are arranged at intervals, the movable rolling part can move on the round blank, the moving interval is 20-50cm, the movable rolling part, wherein the movable rolling part is a roller structure;

[0028] The positioning rolling parts are symmetrically arranged up and down, and the positioning rolling parts adopt a guide roller structure to ensure that they can be concentric without deviation after being squeezed and deformed by the movable rolling parts.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] Since the invention performs heat centering during the process of rolling the round billet by the punching machine, the round billet will not have temperature loss, and the traditional heat centering device is omitted, thereby reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an overall schematic diagram of the present invention;

[0032] Figure 2 is a schematic diagram of the second supporting assembly of the present invention;

[0033] Figure 3 This invention Figure 2 A partial enlarged schematic diagram;

[0034] Figure 4 It is a schematic diagram of the conical pressure head on the pusher of the present invention. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] like Figure 1-4 As shown, a round billet hot centering device includes a piercing machine 1 and upper and lower rollers provided on the piercing machine 1. The upper and lower rollers provided on the piercing machine 1 are in contact with a round billet 2. A pusher 3 is provided on the side of the round billet 2 away from the piercing machine 1. The front end of the pusher 3 is provided with a base 4. A conical pressure head 5 is provided on the base 4. The outer surface of the conical pressure head 5 has a circumferential groove 15 in the longitudinal direction.

[0039] Among them, the pusher 3 is an existing technology that cooperates with the punching machine. A first supporting component 6 is provided on the side of the round blank 2 away from the pusher 3, and the first supporting component 6 is arranged at intervals. A second supporting component 7 is provided on the side of the round blank 2 adjacent to the pusher 3, and the second supporting component 7 is provided above and below to contact the round blank 2.

[0040] The conical indenter 5 is turned and then heat treated in a pit furnace. Heat treatment process: When the pit furnace is heated to 960°C-990°C, the indenter 5 is loaded into a material frame and hoisted into the pit furnace using a crane equipped with a sling. The furnace lid is closed to insulate the heat while industrial alcohol is titrated into the furnace for 30-45 minutes, followed by distilled water for 90-120 minutes. The furnace lid is then opened, the material frame containing the indenter 5 is removed, and the indenter is placed on the ground to air cool to room temperature. This completes the heat treatment process, forming a protective film on the outer surface of the indenter 5, improving its mechanical properties and high-temperature wear resistance.

[0041] In order to facilitate the formation in use, a conical pressure head 5 is provided at the front end of the pusher head to form an extrusion pressure with the end face of the tail end of the round billet 2 to perform heat centering on the round billet. The outer surface of the conical pressure head 5 is turned into a circumferential groove 15 with a width of 2mm-3mm and a depth of 0.5mm-1mm every 5mm-10mm in the longitudinal direction.

[0042] In order to ensure stable perforation after heat centering in the use state, the first supporting assembly 6 includes a movable rolling member 6-1 and a positioning rolling member 6-2. The movable rolling member 6-1 and the positioning rolling member 6-2 are arranged at intervals. The movable rolling member 6-1 can move on the round blank 2 with a moving interval of 20-50 cm. The movable rolling member 6-1 is a movable squeezing roller structure.

[0043] The positioning rolling member 6 - 2 is symmetrically arranged up and down, and the positioning rolling member 6 - 2 adopts a guide roller structure.

[0044] In order to ensure the coaxiality of the hot centering punching in use, the second supporting assembly 7 is spaced apart and arranged at the horizontal guide gap position corresponding to the punching machine 1, and the distance of the horizontal guide gap is controlled to be 50-70 cm;

[0045] The second supporting assembly 7 is symmetrically arranged in the upper and lower parts and contacts the circumferential surface of the round blank 2.

[0046] The second supporting assembly 7 includes a positioning end 8, which is L-shaped as a whole, and a positioning cavity sleeve is fixedly provided on the positioning end 8. A positioning mechanism 12 is movably provided in the positioning cavity sleeve, and a limiting groove 14 is provided on one side of the positioning mechanism 12. A limiting column 16 is provided on the end surface of the positioning end 8 to cooperate with the limiting groove 14;

[0047] One end of the positioning cavity sleeve is connected to the screw cavity sleeve 9, and the end of the screw cavity sleeve 9 is fixed flush with the positioning cavity sleeve.

[0048] In order to facilitate the use of the cylinder to make the tilting pin 11 cooperate with the positioning matching hole, a movable sleeve rod 10 is provided in the screw cavity sleeve 9, and the tilting pin 11 is fixedly provided on the movable sleeve rod 10. The inclination angle of the tilting pin 11 is the same as the angle of the positioning matching hole opened on the positioning mechanism 12.

[0049] In order to facilitate the use of the cylinder to make the tilt pin 11 fit with the positioning matching hole through the extension and contraction, the end of the screw cavity sleeve 9 is connected to the telescopic output end of the electric telescopic cylinder through a screw, and the telescopic distance of the telescopic output end of the cylinder is the same as the fitting depth between the front end of the tilt pin 11 and the positioning matching hole.

[0050] In order to facilitate the formation of a positioning convex plate and a positioning groove to fix the detachable support end 13 in the use state, the positioning mechanism 12 is a positioning block structure, and the positioning block structure is provided with a positioning convex plate, and the positioning convex plate is a trapezoidal structure;

[0051] The positioning protrusion cooperates with the detachable support end 13 sleeved on the outer end of the positioning cavity sleeve.

[0052] In order to achieve detachable replacement in the use state, the detachable support end 13 is provided with a positioning groove that cooperates with the positioning convex plate, and the detachable support end 13 adopts a hollow rectangular structure;

[0053] The lower end of the detachable supporting end 13 is provided with a connecting column 17 that cooperates with the positioning end 8.

[0054] A method for hot centering a round billet comprises the following steps:

[0055] When the pusher 3 pushes the round billet 2 to contact the upper and lower rollers of the piercing machine, the round billet 2 is blocked, and a base 4 is provided at the front end of the pusher 3. A conical pressure head 5 is provided on the base 4 to form an extrusion pressure with the end face of the tail end of the round billet 2. At this time, the front end of the round billet 2 is sucked in by the upper and lower rollers rotating at a low speed, and the round billet 2 rotates forward slowly with the rollers. The rear end of the round billet 2 is pushed by the forward-moving pusher 3, and the conical pressure head 5 on the pusher head at the front end of the pusher 3 moves forward with the pusher 3 at the same time. The conical pressure head 5 pushes out a hole in the middle of the tail end face of the round billet 2 that is rotating forward. After centering, the round billet 2 is directly rolled at high speed by the piercing machine 1. The pusher 3 retreats, and the cooling water passing through the water nozzle cools the conical pressure head 5 at the front end of the pusher head.

[0056] As the round billet 2 rotates forward slowly along with the rolling roller, the round billet 2 is centered and straightened by a second supporting assembly 7 provided on the side of the round billet 2 adjacent to the pushing head 3. The second supporting assembly 7 is provided with upper and lower portions in contact with the round billet 2.

[0057] The second supporting assembly 7 includes a positioning end 8, which is L-shaped as a whole, and a positioning cavity sleeve is fixedly provided on the positioning end 8. A positioning mechanism 12 is movably provided in the positioning cavity sleeve, and a limiting groove 14 is provided on one side of the positioning mechanism 12. A limiting column 16 is provided on the end surface of the positioning end 8 to cooperate with the limiting groove 14;

[0058] The detachable support end 13 is matched with the outer end of the positioning cavity sleeve. The detachable support end 13 is provided with a positioning groove that cooperates with the positioning convex plate. The lower end of the detachable support end 13 is provided with a connecting column 17 that cooperates with the positioning end 8;

[0059] A first supporting assembly 6 is provided on the side of the round blank 2 away from the pushing head 3. The first supporting assembly 6 includes a movable rolling member 6-1 and a positioning rolling member 6-2. The movable rolling member 6-1 and the positioning rolling member 6-2 are arranged at intervals. The movable rolling member 6-1 can move on the round blank 2 with a moving interval of 20-50 cm. The movable rolling member 6-1 is a roller structure.

[0060] The positioning rolling member 6-2 is symmetrically arranged up and down, and the positioning rolling member 6-2 adopts a guide roller structure to ensure that it can be concentric and not deviate after being squeezed and deformed by the movable rolling member 6-1.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0062] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A round billet heat centering device, comprising a punching machine (1) and an upper roller and a lower roller provided on the punching machine (1), wherein the upper roller and the lower roller provided on the punching machine (1) are in contact with the round billet (2), and characterized in that: A pusher (3) is provided on one side of the round billet (2) away from the punching machine (1), a conical pressure head (5) is provided at the front end of the pusher (3), and a circumferential groove (15) is arranged along the longitudinal axis direction of the outer surface of the conical pressure head (5); A first supporting assembly (6) is provided on the side of the round billet (2) away from the pusher (3), and the first supporting assembly (6) is arranged at intervals. A second supporting assembly (7) is provided on the side of the round billet (2) adjacent to the pusher (3); The outer surface of the conical indenter (5) is provided with circumferential grooves (15) with a width of 2mm-3mm and a depth of 0.5mm-1mm, which are turned every 5mm-10mm in the longitudinal direction; The first supporting component (6) comprises a movable rolling part (6-1) and a positioning rolling part (6-2), wherein the movable rolling part (6-1) and the positioning rolling part (6-2) are arranged at intervals, and the movable rolling part (6-1) can move on the round blank (2) with a moving interval of 20-50 cm, and the movable rolling part (6-1) is a movable squeezing roller structure; The positioning rolling member (6-2) is symmetrically arranged up and down, and the positioning rolling member (6-2) adopts a guide roller structure; The second supporting component (7) is symmetrically arranged up and down and contacts the circumferential surface of the round blank (2); The second supporting component (7) includes a positioning end (8), the positioning end (8) is L-shaped as a whole, and the positioning end (8) is fixedly provided with a positioning cavity sleeve, a positioning mechanism (12) is movably provided in the positioning cavity sleeve, a limiting groove (14) is provided on one side of the positioning mechanism (12), and a limiting column (16) is provided on the end surface of the positioning end (8) to cooperate with the limiting groove (14); One end of the positioning cavity sleeve is connected to the screw cavity sleeve (9), and the end of the screw cavity sleeve (9) is fixed flush with the positioning cavity sleeve; A movable sleeve rod (10) is provided in the screw cavity sleeve (9), and a tilting pin (11) is fixedly provided on the movable sleeve rod (10). The tilting angle of the tilting pin (11) is the same as the angle of the positioning matching hole provided on the positioning mechanism (12).

2. The round billet heat centering device according to claim 1, characterized in that: The end of the screw cavity sleeve (9) is connected to the telescopic output end of the electric telescopic cylinder via a screw, and the telescopic distance of the telescopic output end of the cylinder is the same as the fitting depth between the front end of the tilting pin (11) and the positioning fitting hole.

3. The round billet heat centering device according to claim 2, characterized in that: The positioning mechanism (12) is a positioning block structure, a positioning convex plate is provided on the positioning block structure, and the positioning convex plate is a trapezoidal structure; The positioning convex plate cooperates with a detachable support end (13) sleeved on the outer end of the positioning cavity sleeve.

4. The round billet heat centering device according to claim 3, characterized in that: The detachable support end (13) is provided with a positioning groove that cooperates with the positioning convex plate; The detachable support end (13) is provided in a hollow rectangular structure; The lower end of the detachable support end (13) is provided with a connecting column (17) that cooperates with the positioning end (8).

5. A centering method for a round billet heat centering device according to claim 4, characterized in that: The following steps are included: When the pusher (3) pushes the round billet (2) to contact the upper roller and the lower roller of the punching machine, the round billet (2) is blocked, and the pusher head at the front end of the pusher (3) is provided with a conical pressure head (5) to form an extrusion pressure with the tail end face of the round billet (2). At this time, the front end of the round billet (2) is sucked in by the upper roller / lower roller rotating at a low speed, and the round billet (2) rotates forward slowly with the roller, and the rear end of the round billet (2) is pushed by the pusher (3) moving forward. The conical pressure head (5) on the pusher head at the front end of the pusher (3) moves forward with the pusher (3) at the same time, and the conical pressure head (5) pushes out a hole in the middle of the tail end face of the round billet (2) rotating forward. After centering, the round billet (2) is directly rolled at a high speed by the punching machine (1), and the pusher (3) is withdrawn. The cooling water passing through the water nozzle cools the conical pressure head (5) at the front end of the pusher head; Wherein, as the round billet (2) rotates forward slowly along with the rolling roller, the round billet (2) is centered and straightened by a second supporting assembly (7) provided on a side of the round billet (2) adjacent to the pusher (3), and the second supporting assembly (7) is symmetrically provided up and down and contacts the circumferential surface of the round billet (2).

Images