A double-drum symmetrical rolling mechanism

Abstract

The present invention relates to a double-drum symmetrical rolling mechanism, which comprises a cylindrical blank roller, a supporting roller and a symmetrical eccentric wheel, wherein the supporting roller is provided with a first gear, one end of the supporting roller is provided with a second gear, one end of the supporting roller is provided with a rotating bracket, the rotating bracket is provided with a rotating bracket driving pin, the symmetrical eccentric wheel is provided with a fixing pin, the lower end of the symmetrical eccentric wheel is provided with a symmetrical eccentric wheel rotating pin, and the symmetrical eccentric wheel rotating pin is provided with a driving oil cylinder connecting rod, so as to change the original situation that the small arc cannot be rounded and the rounding effect is not ideal, the rounding effect control error is within 0.25MM, the rounding speed is high and the efficiency is high, and the rapid rounding of one piece in half a minute is realized, so as to eliminate the original loss of scrapped blanks due to the inability to round.

Description

Technical Field

[0001] The invention relates to the field of steel pipe manufacturing, and in particular to a double-drum symmetrical rolling mechanism. Background Art

[0002] At present, the material used is a steel pipe with an outer diameter of φ460MM and a wall thickness of 8MM, and the length of the material is 175MM. Round pipes are thin-walled steel pipes. There are errors in the non-roundness and non-straightness of long steel pipes, errors in the previous pipe cutting and material release, and many other accumulated errors, resulting in elliptical and partially non-round shapes, which seriously affect the welding and processing of products. The traditional three-axis rolling can reduce the large arc, but the local small arc cannot be enlarged, and the rounding effect is not good. It can only be corrected with a hammer or lever in the next process, which is labor-intensive, time-consuming, and the effect is still not ideal. More than 10% of the billets cannot be rounded and are scrapped. Summary of the invention

[0003] In view of the above technical problems, the present invention proposes a double-drum symmetrical rolling mechanism with good rounding effect and small error.

[0004] In order to solve the above technical problems, the present invention provides a double-drum symmetrical rolling mechanism, which includes at least three supporting rollers and symmetrical eccentric wheels, wherein the supporting rollers are arranged around the periphery of the cylindrical blank roller, at least two hydraulic cylinders are arranged at one end of the cylindrical blank roller, the supporting roller and the hydraulic cylinder are arranged in close contact, a first gear is arranged on the supporting roller, a second gear is arranged at the other end of the supporting roller, the supporting roller and the hydraulic cylinder are connected by a first covering belt, a rotating bracket is arranged at one end of the supporting roller, a rotating bracket driving pin is arranged on the rotating bracket, the symmetrical eccentric wheel is connected to the rotating bracket through a rotating bracket driving connecting rod, a fixing pin is arranged on the symmetrical eccentric wheel, a symmetrical eccentric wheel rotating pin is arranged at the lower end of the symmetrical eccentric wheel, the symmetrical eccentric wheel is connected to the symmetrical eccentric wheel rotating pin through a second covering belt, and a driving oil cylinder connecting rod is arranged on the symmetrical eccentric wheel rotating pin;

[0005] The support roller and the hydraulic cylinder are respectively provided with support points A axis, B axis, C axis, D axis and E axis.

[0006] The hydraulic cylinder symmetrically rolls the large arc of the distance between each support to a smaller size through the support points D axis, C axis and B axis.

[0007] The support roller consists of a first support roller, a second support roller and a third support roller. The first support roller and the second support roller are rigidly connected to the first gear and rotate together. The third support roller is separated from the first gear and rotates coaxially. The third support roller is a free rotating part. The support rollers rotate clockwise at the same time driven by the first gear.

[0008] The second gear drives the first gear on the second supporting roller, and the first gear on the second supporting roller drives the first gears on the first supporting roller and the third supporting roller to rotate in the same direction to complete the rotational motion.

[0009] The beneficial effects achieved by the present invention are:

[0010] The present invention discloses a double-drum symmetrical rolling mechanism, which comprises a cylindrical blank roller, a supporting roller and a symmetrical eccentric wheel, wherein at least two hydraulic cylinders are arranged at one end of the cylindrical blank roller, the supporting roller is arranged in close contact with the hydraulic cylinder, a first gear is arranged on the supporting roller, the supporting roller is arranged around the periphery of the cylindrical blank roller, the supporting roller is arranged in at least three, a second gear is arranged at one end of the supporting roller, the supporting roller is connected to the hydraulic cylinder through a first covering belt, a rotating bracket is arranged at one end of the supporting roller, and the rotating bracket A rotating bracket driving pin is arranged on the top, the symmetrical eccentric wheel is connected to the rotating bracket through a rotating bracket driving connecting rod, a fixing pin is arranged on the symmetrical eccentric wheel, a symmetrical eccentric wheel rotating pin is arranged at the lower end of the symmetrical eccentric wheel, the symmetrical eccentric wheel is connected to the symmetrical eccentric wheel rotating pin through a second covering belt, the hydraulic cylinder is rolled symmetrically, and the same amount is rolled in at the same time, and the large arc between DC can be rolled smaller through the supporting point D axis, C axis and B axis, and the large arc between BC can be pressed smaller, and the small arc of the AE part can be rolled through the C axis to evolve in the direction of enlargement. The large arc can be reduced, or the small arc can be enlarged. The roller structure has set pressure, set position, and set time, which can stably roll the cylinder to meet the specified requirements.

[0011] The original situation that the small arc could not be rounded and the rounding effect was not ideal has been changed. The rounding effect control error is within 0.25MM, the rounding speed is high and efficient, and a fast rounding of one piece in half a minute has been achieved. The loss of scrapped blanks due to the original inability to round is eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of a double-drum symmetrical rolling mechanism.

[0013] Among them: 1-cylindrical blank roller, 101-hydraulic cylinder, 2-support roller, 201-first gear, 202-second gear, 203-first support roller, 204-second support roller, 205-third support roller, 3-symmetrical eccentric wheel, 4-rotating bracket, 5-rotating bracket driving pin, 6-rotating bracket driving connecting rod, 7-fixing pin, 8-symmetrical eccentric wheel rotating pin, 9-second covering belt, 10-driving cylinder connecting rod, 11-first covering belt. DETAILED DESCRIPTION

[0014] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0015] like Figure 1 As shown, a double-drum symmetrical rolling mechanism includes at least three supporting rollers 2 and symmetrical eccentric wheels 3, wherein the supporting rollers 2 are arranged around the periphery of a cylindrical blank roller 1, at least two hydraulic cylinders 101 are arranged at one end of the cylindrical blank roller 1, the supporting roller 2 and the hydraulic cylinder 101 are arranged in close contact, a first gear 201 is arranged on the supporting roller 2, and a second gear 202 is arranged at the other end of the supporting roller 2, the supporting roller 2 and the hydraulic cylinder 101 are connected through a first covering belt 11, and supporting points A axis, B axis C axis, D axis and E axis are respectively provided on the supporting roller 2 and the hydraulic cylinder 101, and the hydraulic cylinder 101 symmetrically rolls the large arc of the spacing between each support through the supporting points D axis, C axis and B axis. A rotating bracket 4 is provided at one end of the support roller 2, and a rotating bracket driving pin 5 is provided on the rotating bracket 4. The symmetrical eccentric wheel 3 is connected to the rotating bracket 4 through a rotating bracket driving connecting rod 6. A fixing pin 7 is provided on the symmetrical eccentric wheel 3. A symmetrical eccentric wheel rotating pin 8 is provided at the lower end of the symmetrical eccentric wheel 3. The symmetrical eccentric wheel 3 is connected to the symmetrical eccentric wheel rotating pin 8 through a second covering belt 9, and a driving cylinder connecting rod 10 is provided on the symmetrical eccentric wheel rotating pin 8.

[0016] The supporting roller 2 is composed of a first supporting roller 203 , a second supporting roller 204 and a third supporting roller 205 .

[0017] The working principle is shown in the figure:

[0018] The second gear 202 drives the first gear 201 on the second supporting roller 204, and the first gear 201 on the second supporting roller 204 drives the first gears 201 on the first supporting roller 203 and the third supporting roller 205 to rotate in the same direction, and the rotational motion is completed by the meshing of four gears.

[0019] The B axis, C axis, D axis and F axis are fixed on the cylinder box and support their rotational movement. The rotating bracket 4 supports the E axis and can rotate around the D axis. The rotating bracket 4 supports the A axis and can rotate around the B axis. The F axis is the central axis of the symmetrical eccentric wheel 3.

[0020] The hydraulic cylinder 101 can rotate freely around the E axis, and the hydraulic cylinder 101 can rotate freely around the A axis.

[0021] The first supporting roller 203 and the second supporting roller 204 are rigidly connected with the first gear 201 and rotate together, the third supporting roller 205 is separated from the first gear 201 and rotates coaxially, the third supporting roller 205 is a freely rotating part, and the supporting rollers 2 on both sides rotate clockwise at the same time driven by the second gear 202; the second gear 202 drives the first gear 201 on the second supporting roller 204, and the first gear 201 on the second supporting roller 204 drives the first supporting roller 203 and the first gear 201 on the third supporting roller 205 to rotate in the same direction to complete the rotational movement.

[0022] The symmetrical eccentric wheel 3 is driven by the driving cylinder through the driving cylinder connecting rod 10 to rotate clockwise, and the left and right brackets rotate clockwise and counterclockwise around the D axis and the B axis respectively, driving the hydraulic cylinder 101 to press against the inner circle of the product blank, thereby generating a product arc. The small arc becomes larger during rolling, and the large arc becomes smaller during rolling, so as to achieve a consistent inner arc until it meets the requirements. The driving cylinder retracts and drives the symmetrical eccentric wheel 3 to reverse, so that the hydraulic cylinder 101 is away from the product blank, and the round product blank that has been rounded can be taken out. Then put the blank to be rounded into the rounding area for rounding, and the work is cyclical.

[0023] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A double-drum symmetrical rolling mechanism, characterized in that: The invention comprises a first supporting roller (203), a second supporting roller (204), a third supporting roller (205) and a symmetrical eccentric wheel (3); the first supporting roller (203), the third supporting roller (205) and the second supporting roller (204) are sequentially arranged around the periphery of the cylindrical blank (1); the first supporting roller (203), the third supporting roller (205) and the second supporting roller (204) are all provided with a first gear (201); the first gear (201) on the third supporting roller (205) is meshed with a second gear (202); The cylindrical blank (1) is provided with a first hydraulic cylinder and a second hydraulic cylinder, the first supporting roller (203) is connected to the first hydraulic cylinder via a first covering belt (11), the second supporting roller (204) is connected to the second hydraulic cylinder via another first covering belt (11), one end of each of the first supporting roller (203) and the second supporting roller (204) is provided with a rotating bracket (4), the first supporting roller (203) is arranged on the rotating bracket (4) via a B axis, the second supporting roller (204) is arranged on the rotating bracket (4) via a D axis, the third supporting roller (205) is supported via a C axis, the first hydraulic cylinder is supported via an A axis, and the second hydraulic cylinder is supported via an E axis; The rotating bracket (4) is provided with a rotating bracket driving pin (5), the symmetrical eccentric wheel (3) is connected to the rotating bracket driving pin (5) via a rotating bracket driving connecting rod (6), the symmetrical eccentric wheel (3) is provided with a fixing pin (7), the lower end of the symmetrical eccentric wheel (3) is provided with a symmetrical eccentric wheel rotating pin (8), the symmetrical eccentric wheel (3) is connected to the symmetrical eccentric wheel rotating pin (8) via a second covering belt (9), the symmetrical eccentric wheel rotating pin (8) is provided with a driving cylinder connecting rod (10), the F axis is the central axis of the symmetrical eccentric wheel (3), the B axis, the C axis, the D axis and the F axis are fixed on the cylinder box, one of the rotating brackets (4) supports the E axis and can rotate around the D axis, and the other rotating bracket (4) supports the A axis and can rotate around the B axis; The second gear (202) drives the first gear (201) on the third supporting roller (205), and the first gear (201) on the third supporting roller (205) drives the first gear (201) on the first supporting roller (203) and the second supporting roller (204) to rotate in the same direction to complete the rotational motion; The symmetrical eccentric wheel (3) is driven by a driving cylinder via a driving cylinder connecting rod (10) to rotate clockwise, a rotating bracket (4) rotates clockwise around the D axis, and the other rotating bracket (4) rotates counterclockwise around the B axis, driving the hydraulic cylinder (101) to press against the inner wall of the cylindrical blank (1) to produce a product arc; the driving cylinder retracts to drive the symmetrical eccentric wheel (3) to reverse, so that the hydraulic cylinder (101) is away from the inner wall of the product blank, the rounded product is taken out, and then the cylindrical blank (1) to be rounded is placed in the rounding area for rounding, and the work is cyclical.

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