Correcting method for strip steel of stainless steel single-stand rolling mill

Abstract

The invention discloses a deviation rectifying method for strip steel of a stainless steel single-stand rolling mill, the rolling mill comprises a coiling machine and a transmission device, and the coiling machine comprises an outer supporting piece and a coiling block connected with the output end of the transmission device; the winding drum comprises a shaft body, a shaft head and a shaft neck arranged at the joint of the shaft body and the shaft head, and the shaft head is sleeved with the outer supporting piece. The outer supporting piece comprises a hydraulic cylinder and an eccentric sleeve, and the shaft head is sleeved with the eccentric sleeve. The deviation rectifying method comprises the following steps: (1) setting up a meter: respectively arranging a first detector and a second detector under and on the front side of the end part of one side, close to a shaft head, of a drum shaft body of the rolling mill; adjusting readings of the first detector and the second detector to return to zero; (2) testing: adjusting the position of the outer supporting piece to enable the outer supporting piece to be separated from the shaft head and then reset; and (3) deviation rectification: observing the readings of the first detector and the second detector, and adjusting the position of the eccentric bushing of the outer supporting piece according to the readings, so as to adjust the position of the winding drum. Compared with the prior art, the method is simple in step and does not need extra moving tools.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold rolling, in particular to a deviation rectification method for a single-stand stainless steel rolling mill. BACKGROUND

[0002] At present, most of the cold rolling mills in large domestic stainless steel plants adopt a 20-roll single-stand cold rolling mill, which has the advantages of compact equipment structure, relatively light equipment installation weight, small floor area, good stability of the rolling mill housing, and high production efficiency. The main equipment of the unit includes the rolling mill housing, the coiler, the wiper, the shape roller, the steel coil trolley, and the belt assisted coiler, etc. However, in the process of high-speed rolling, the deviation of the strip has always been a major technical problem to be solved, which not only seriously affects the quality of the strip product, but also may cause the edge of the strip to be scratched by the adjacent mechanical equipment, leading to friction fire and other serious safety accidents.

[0003] The factors affecting the deviation of the strip of the single-stand cold rolling mill are multiple and complex: firstly, the incoming strip has poor shape, such as wave shape or sickle bend defects; secondly, the difference in roll arrangement, the wear, precision and assembly state of the rolls directly affect the trajectory of the strip; thirdly, the oil is not cleaned by the wiper, resulting in uneven distribution of rolling oil and causing asymmetric friction force; fourthly, the position of the coiler drum is abnormal, especially when the cooperation precision between the outer support equipment and the coiler drum is insufficient, which will significantly aggravate the deviation phenomenon

[0004] At present, the traditional solution to the problem of strip deviation mainly relies on photoelectric or pneumatic detection devices combined with a hydraulic deviation rectification system. For example, a Chinese invention application with the application number 201510545110.0 (application publication number CN106475429A) discloses a “strip uncoiling automatic deviation rectification method and device”, which detects the position deviation of the steel coil by setting a pair of distance sensors on both sides of the steel coil, and uses a side guide plate to clamp the strip and push it back to the center position of the unit. Although this method achieves automatic deviation rectification to some extent, it relies on external sensors and complex control systems, which has high investment and maintenance costs, and the response speed and reliability are still insufficient under high-speed rolling conditions, and it only rectifies the deviation of the steel coil without finding out the causes of the deviation and adjusting them. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a deviation rectification method for a single-stand stainless steel rolling mill which is simple in steps and easy to operate.

[0006] The technical scheme adopted by the present application to solve the above technical problems is as follows: a stainless steel single-machine-frame rolling mill strip deviation correction method, the rolling mill comprising a coiler and a transmission device, the coiler comprising an outer support and a winding drum connected to the output end of the transmission device; the winding drum comprising a shaft body, a shaft head and a journal provided at the connection between the shaft body and the shaft head, the outer support being sleeved on the shaft head; characterized in that:

[0007] The outer support comprises a hydraulic cylinder and an eccentric sleeve, the eccentric sleeve being sleeved on the shaft head, and the power output end of the hydraulic cylinder being connected to the eccentric sleeve to drive the eccentric sleeve to displace;

[0008] The deviation correction method comprises the following steps:

[0009] ①Frame table: a first detector and a second detector are respectively arranged below and on the side of the end of the winding drum shaft body near the shaft head of the rolling mill; the readings of the first detector and the second detector are adjusted to zero;

[0010] ②Test: the position of the outer support is adjusted to make the outer support disengage from the shaft head, and then reset to make the outer support be sleeved on the shaft head; the above step of adjusting the position of the outer support is repeatedly performed multiple times;

[0011] ③Deviation correction: the readings of the first detector and the second detector are observed, and the position of the eccentric sleeve of the outer support is adjusted according to the readings to adjust the position of the winding drum.

[0012] There are various methods for adjusting the eccentric sleeve, preferably, the step ③ comprises:

[0013] When the reading of the first detector is in a positive state, the eccentric sleeve is lifted upward;

[0014] When the reading of the first detector is in a negative state, the eccentric sleeve is moved downward;

[0015] When the reading of the second detector is in a positive state, the eccentric sleeve is controlled to move away from the second detector;

[0016] When the reading of the second detector is in a negative state, the eccentric sleeve is controlled to move close to the second detector.

[0017] In order to facilitate detection of the displacement of the winding drum, preferably, the first detector and the second detector are both dial gauges, and are fixed below and on the side of the end of the winding drum shaft body near the shaft head through a bracket.

[0018] In order to adjust the positions of the first detector and the second detector as needed, preferably, the bracket is arranged on a coil car.

[0019] Preferably, the outer diameter of the shaft head gradually decreases away from the journal; and the inner diameter of the eccentric sleeve gradually decreases from outside to inside.

[0020] Preferably, the outer support further includes a baffle, one end of which is connected to the power output end of the hydraulic cylinder, and the other end is connected to the eccentric sleeve. The baffle drives the eccentric sleeve to move and / or rotate.

[0021] Preferably, the end of the eccentric sleeve extends outward to form a baffle.

[0022] For ease of operation and to avoid the use of other equipment, preferably, the outer support also includes a base located outside the eccentric sleeve. The eccentric sleeve and the base are connected by a plurality of evenly arranged bolts, and the position of the eccentric sleeve is adjusted by adjusting the tightness of the bolts.

[0023] To provide power to the drum, the mill preferably also includes a gearbox for driving the drum.

[0024] Compared with the prior art, the advantages of the present invention are as follows: by using a first detector and a second detector to determine the movement and positional relationship between the coiler drum and the outer support, the abnormal position of the drum can be quickly determined. The eccentric sleeve of the outer support can be adjusted through a simple and easy-to-operate method to change the position of the drum, correct the mill deviation, which is convenient, fast and efficient. No additional external adjustment equipment is required, and the mill does not need to be dismantled and adjusted significantly, which facilitates operation and reduces the risk of operation. Attached Figure Description

[0025] Fig. 1 This is a schematic diagram of the structure of an embodiment (excluding the support frame);

[0026] Fig. 2 This is a cross-sectional view of an embodiment;

[0027] Fig. 3 This is a schematic diagram of the eccentric sleeve in an embodiment. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] like Figs. 1-3 The diagram shows a preferred embodiment of the present invention. The rolling mill includes a coiler 1, a transmission device 2, a first detector 3, a second detector 4, a coil trolley 5, a gearbox 6, and a support 7.

[0030] The winding machine 1 includes an outer support member 11 and a drum 12 connected to the output end of the transmission device 2. The drum 12 includes a shaft body 121, a shaft head 122, and a journal 123 located at the connection between the shaft body 121 and the shaft head 122. The outer support member 11 is sleeved on the shaft head 122. The outer support member 11 includes a hydraulic cylinder 111 and an eccentric sleeve 112. The eccentric sleeve 112 is sleeved on the shaft head 122, and the power output end of the hydraulic cylinder 111 is connected to the eccentric sleeve 112, thereby driving the eccentric sleeve 112 to move. The outer diameter of the shaft head 122 gradually decreases as it moves away from the journal 123; the corresponding inner diameter of the eccentric sleeve 112 gradually decreases from the outside to the inside.

[0031] The outer support member 11 also includes a baffle 114, one end of which is connected to the power output end of the hydraulic cylinder 111, and the other end is connected to the eccentric sleeve 112. The baffle 114 drives the eccentric sleeve 112 to move and / or rotate. The end of the eccentric sleeve 112 extends outward to form a baffle 113. The outer support member 11 also includes a base disposed outside the eccentric sleeve 112. The eccentric sleeve 112 and the base are connected by a plurality of evenly arranged bolts, and the position of the eccentric sleeve 112 is adjusted by adjusting the tightness of the bolts.

[0032] The cross-section of the eccentric sleeve 112 is not a perfect circle. The baffle 114 drives the eccentric sleeve 112 to rotate. Every 120° rotation of the eccentric sleeve 112 causes the drum 12 to shift by 1mm. One rotation of the eccentric sleeve 112 causes the drum 12 to shift by 3mm.

[0033] Both the first measuring instrument 3 and the second measuring instrument 4 are dial indicators, and are fixed by the bracket 7 directly below and to the side of the end of the shaft 121 near the shaft head 122. In other embodiments, the first measuring instrument 3 and the second measuring instrument 4 can also be other measuring instruments, such as a light sensor, an infrared sensor, etc.

[0034] The gearbox 6 is used to drive the drum 12. The bracket 7 is mounted on the steel coil trolley 5.

[0035] The method for correcting the deviation of strip steel in a stainless steel single-stand rolling mill includes the following steps:

[0036] ① Set up the instruments: Set up the first detector 3 and the second detector 4 directly below and to the side of the end of the roll body 121 near the head 122 of the rolling mill; adjust the readings of the first detector 3 and the second detector 4 to zero.

[0037] ② Test: Adjust the position of the outer support 11 so that the outer support 11 is disengaged from the shaft head 122, then reset it so that the outer support 11 is fitted onto the shaft head 122; repeat the above steps of adjusting the position of the outer support 11 multiple times.

[0038] ③Correcting deviation: observing the readings of the first detector 3 and the second detector 4, adjusting the position of the eccentric sleeve 112 of the outer support 11 according to the readings, so as to adjust the position of the roller 12:

[0039] When the reading of the first detector 3 is positive, the eccentric sleeve 112 is lifted upward;

[0040] When the reading of the first detector 3 is negative, the eccentric sleeve 112 is moved downward;

[0041] When the reading of the second detector 4 is positive, the eccentric sleeve 112 is controlled to move away from the second detector 4;

[0042] When the reading of the second detector 4 is negative, the eccentric sleeve 112 is controlled to move close to the second detector 4.

[0043] ④Re-testing: adjusting the position of the outer support 11 again, observing the readings of the first detector 3 and the second detector 4, if the readings of the first detector 3 and the second detector 4 are still changing, repeating step ③; if the readings of the first detector 3 and the second detector 4 are unchanged and remain 0, the adjustment of the position deviation of the roller 12 is completed, and the position of the roller 12 is in the best state, thereby solving the problem of strip deviation in the rolling process caused by abnormal position of the roller 12.

Claims

1. A method for correcting the deviation of strip steel in a stainless steel single-stand rolling mill, the rolling mill comprising a coiler (1) and a transmission device (2), the coiler (1) comprising an outer support member (11) and a drum (12) connected to the output end of the transmission device (2); the drum (12) comprising a shaft body (121), a shaft head (122) and a journal (123) disposed at the connection between the shaft body (121) and the shaft head (122), the outer support member (11) being sleeved on the shaft head (122); characterized in that: The outer support member (11) includes a hydraulic cylinder (111) and an eccentric sleeve (112). The eccentric sleeve (112) is sleeved on the shaft head (122). The power output end of the hydraulic cylinder (111) is connected to the eccentric sleeve (112), thereby driving the eccentric sleeve (112) to move. The correction method includes the following steps: ① Set up the instruments: Set up the first detector (3) and the second detector (4) directly below and to the side of the end of the roller (12) shaft (121) near the shaft head (122) of the rolling mill; adjust the readings of the first detector (3) and the second detector (4) to zero; ② Test: Adjust the position of the outer support (11) so that the outer support (11) is disengaged from the shaft head (122), and then reset it so that the outer support (11) is sleeved on the shaft head (122); repeat the above steps of adjusting the position of the outer support (11) multiple times. ③Correction: Observe the readings of the first detector (3) and the second detector (4), and adjust the position of the eccentric sleeve (112) of the outer support (11) according to the readings, thereby adjusting the position of the drum (12).

2. The method for correcting the deviation of strip steel in a stainless steel single-stand rolling mill according to claim 1, characterized in that: Step ③ includes: When the reading of the first detector (3) is positive, the eccentric sleeve (112) is lifted upwards; When the reading of the first detector (3) is negative, the eccentric sleeve (112) moves downward; When the reading of the second detector (4) is positive, control the eccentric sleeve (112) to move away from the second detector (4); When the reading of the second detector (4) is negative, control the eccentric sleeve (112) to move closer to the second detector (4).

3. The method for correcting the deviation of strip steel in a stainless steel single-stand rolling mill according to claim 1, characterized in that: The first detector (3) and the second detector (4) are both dial indicators, and are fixed by bracket (7) directly below and to the side of the end of the drum (121) near the shaft head (122).

4. The method for correcting the deviation of strip steel in a stainless steel single-stand rolling mill according to claim 3, characterized in that: The bracket (7) is mounted on the steel coil trolley (5).

5. The method for correcting the deviation of strip steel in a stainless steel single-stand rolling mill according to claim 1, characterized in that: The outer diameter of the shaft head (122) gradually decreases as it moves away from the journal (123); the inner diameter of the corresponding eccentric sleeve (112) gradually decreases from the outside to the inside.

6. The method for correcting the deviation of strip steel in a stainless steel single-stand rolling mill according to claim 1, characterized in that: The outer support member (11) also includes a baffle (114), one end of which is connected to the power output end of the hydraulic cylinder (111), and the other end is connected to the eccentric sleeve (112). The baffle (114) drives the eccentric sleeve (112) to move and / or rotate.

7. The method for correcting the deviation of strip steel in a stainless steel single-stand rolling mill according to claim 6, characterized in that: The eccentric sleeve (112) extends outward at its end to form a baffle (113).

8. The method for correcting the deviation of strip steel in a stainless steel single-stand rolling mill according to claim 1, characterized in that: The outer support member (11) also includes a base located outside the eccentric sleeve (112). The eccentric sleeve (112) and the base are connected by a plurality of evenly arranged bolts. The position of the eccentric sleeve (112) can be adjusted by adjusting the tightness of the bolts.

9. The method for correcting the deviation of strip steel in a stainless steel single-stand rolling mill according to claim 1, characterized in that: The rolling mill also includes a gearbox (6) for driving the drum (12).

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