Off-line short-stress finish rolling mill roll gap measurement and rolling groove pull welding auxiliary device

Abstract

The utility model discloses an off-line short-stress finish rolling mill roll gap measurement and roll groove pull welding auxiliary device which comprises a frame body, a first driving assembly used for driving an upper roll of a short-stress finish rolling mill to rotate in the forward direction, a second driving assembly used for driving a lower roll of the short-stress finish rolling mill to rotate in the reverse direction and a controller. The first driving assembly and the second driving assembly are both fixedly connected with the frame body. And the controller is used for controlling the first driving assembly and the second driving assembly to simultaneously drive an upper roller and a lower roller of the short-stress finish rolling mill to rotate oppositely so as to measure a roller gap, or independently controlling the first driving assembly to drive the upper roller of the short-stress finish rolling mill to rotate so as to carry out rolling groove pull welding. The device can assist in measuring the roll gap and assisting in drawing and welding the rolling groove in the off-line state of the short-stress finish rolling mill, the stop time of a steel rolling production line can be shortened, the production efficiency is improved, and safety accidents are effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of steel rolling production technology, and in particular to an offline short-stress precision rolling mill roll gap measurement and groove welding auxiliary device. Background Technology

[0002] In the steel rolling production process, a certain number of short-stress rolling mills are usually required to form a production line to roll steel billets. Roll gap measurement and groove welding of short-stress rolling mills are important links in steel production. Roll gap accuracy directly determines dimensional accuracy, and groove welding can increase the friction between the groove and the rolled workpiece, enabling the groove to effectively bite into the workpiece, preventing slippage, and ensuring stable rolling.

[0003] The multiple short-stress finishing mills located at the rear of the steel rolling production line are designed for precise thickness and shape control. These mills apply significant rolling forces to the rolls. Under immense pressure and high-speed rotation, the roll surfaces experience intense friction with the high-temperature steel billets, leading to gradual wear of the roll surface metal. This widens the roll gap and reduces friction, directly impacting product thickness accuracy. Therefore, the steel rolling production line requires frequent replacement of existing short-stress finishing mills with backup ones. Furthermore, the replacement backup short-stress finishing mills must maintain a set roll gap and undergo groove welding.

[0004] In existing technologies, when replacing a short-stress finishing mill with a backup short-stress finishing mill, the entire production line's steel rolling process is usually stopped first. Then, the backup short-stress finishing mill is installed on the production line. The rotation of the rolls of one or more short-stress finishing mills is controlled online using a local control box. During the roll rotation, the operator uses measuring tools to measure the roll gap and stands at the mill exit end to use electric welding and packing wire to pull weld at the groove.

[0005] While this method of first installing a spare short-stress finishing mill onto the production line and then performing online roll gap measurement and groove welding can complete the replacement of the short-stress finishing mill, it results in a longer downtime for the production line, reducing the efficiency of steel rolling production. Utility Model Content

[0006] Therefore, it is necessary to provide an offline auxiliary device for measuring the roll gap and welding the groove of a short-stress finishing mill to address the aforementioned technical problems. This device can perform auxiliary roll gap measurement and groove welding on standby short-stress finishing mills offline, thereby reducing the replacement time of standby short-stress finishing mills, shortening the downtime of the steel rolling production line, and effectively improving production efficiency.

[0007] This utility model provides an offline short-stress precision rolling mill roll gap measurement and groove welding auxiliary device, including:

[0008] Frame;

[0009] The first drive assembly is used to drive the upper roll of the short-stress finishing mill to rotate in the forward direction. The first drive assembly is fixedly connected to the frame.

[0010] The second drive assembly is used to drive the lower roll of the short-stress finishing mill to rotate in the opposite direction. The second drive assembly is fixedly connected to the frame.

[0011] The controller is used to control the first drive assembly and the second drive assembly to simultaneously drive the upper and lower rolls of the short stress finishing mill to rotate in opposite directions for roll gap measurement, or to control the first drive assembly to drive the upper roll of the short stress finishing mill to rotate for groove welding.

[0012] Both the first drive assembly and the second drive assembly are equipped with a geared motor and a universal joint, with one end of the universal joint being axially fixedly connected to the geared motor.

[0013] The distance between the output shaft axes of the geared motors of the two drive components is equal to the set distance between the roll head axes of the upper and lower rolls of the short-stress finishing mill, and the geared motors of both drive components are electrically connected to the controller.

[0014] The end of the universal joint of the first drive assembly away from the geared motor is axially fixedly connected to the upper roll of the short-stress finishing mill, and the end of the universal joint of the second drive assembly away from the geared motor is axially fixedly connected to the lower roll of the short-stress finishing mill.

[0015] In one embodiment, the controller includes a first control circuit for simultaneously controlling the geared motors of the first drive assembly and the second drive assembly to rotate in opposite directions, a second control circuit for individually controlling the rotation of the geared motor of the first drive assembly, a switch for switching the first control circuit and the second control circuit according to different operating conditions, a start button, and a stop button.

[0016] The first control circuit is electrically connected to both the geared motor of the first drive assembly and the geared motor of the second drive assembly, and the second control circuit is electrically connected to the geared motor of the first drive assembly.

[0017] Both the first and second control circuits are electrically connected to the switch, and the start and stop buttons are connected between the external power supply and the switch.

[0018] In one embodiment, a bushing is fixedly connected to one end of the universal joint, and a hexagonal sleeve is fixedly connected to the other end for axially fixed connection with the roll head of the upper or lower roll of a short-stress finishing mill.

[0019] The bushing is axially fixed to the geared motor.

[0020] In one embodiment, the frame has a double-layer structure, with the drive motor of the first drive component fixedly mounted on the upper layer of the frame and the drive motor of the second drive component fixedly mounted on the lower layer of the frame.

[0021] The beneficial effects of this utility model are as follows: The offline short-stress finishing mill roll gap measurement and groove welding auxiliary device of this utility model, through the controller, controls the first and second drive components to rotate the upper and lower rolls of the mill simultaneously or the upper roll rotates alone under different working conditions. This allows for auxiliary roll gap measurement and groove welding of the standby short-stress finishing mill in an offline state. The standby short-stress finishing mill, after roll gap measurement and groove welding using this auxiliary device, is quickly returned to the production line, reducing production line downtime and avoiding a decrease in production efficiency. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of the offline short-stress precision rolling mill roll gap measurement and groove welding auxiliary device provided in this embodiment of the utility model;

[0023] Figure 2 A schematic diagram showing the assembly relationship between the offline short-stress finishing mill roll gap measurement and groove welding auxiliary device and the short-stress finishing mill, as provided in this embodiment of the utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Frame; 2. First drive assembly; 3. Second drive assembly; 4. Controller; 5. Gear motor; 6. Universal joint; 61. Bushing; 62. Hexagonal sleeve; 7. Short stress precision rolling mill. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] It should be noted that in the description of this utility model, "upper," "lower," "top," "bottom," and orientation or positional relationship are based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In one embodiment, such as Figure 1 and Figure 2 As shown, the offline short-stress finishing mill roll gap measurement and groove welding auxiliary device of this embodiment includes:

[0028] Frame 1 has a double-layer structure. Specifically, the upper and lower layers of frame 1 are of equal height.

[0029] A first drive assembly 2 is used to drive the upper roll of the short-stress finishing mill 7 to rotate in the forward direction, and the first drive assembly 2 is fixedly connected to the frame 1; a second drive assembly 3 is used to drive the lower roll of the short-stress finishing mill 7 to rotate in the reverse direction, and the second drive assembly 3 is fixedly connected to the frame 1.

[0030] For example, if the upper roll of the short-stress finishing mill 7 rotates clockwise in the forward direction, then the lower roll of the short-stress finishing mill 7 rotates clockwise in the reverse direction, and the upper and lower rolls rotate relative to each other to roll steel.

[0031] The controller 4 is used to control the first drive assembly 2 and the second drive assembly 3 to simultaneously drive the upper and lower rolls of the short stress finishing mill 7 to rotate in opposite directions for roll gap measurement, or to control the first drive assembly 2 to drive the upper roll of the short stress finishing mill 7 to rotate for groove welding.

[0032] In this embodiment, both the first drive assembly 2 and the second drive assembly 3 are provided with a geared motor 5 and a universal joint 6, with one end of the universal joint 6 being axially fixedly connected to the geared motor 5.

[0033] Specifically, the drive motor of the first drive assembly 2 is fixedly mounted on the upper layer of the frame 1, and the drive motor of the second drive assembly 3 is fixedly mounted on the lower layer of the frame 1.

[0034] The distance between the output shaft axes of the geared motors 5 of the two drive components is equal to the set distance between the roll head axes of the upper and lower rolls of the short-stress finishing mill 7, and both geared motors 5 of the drive components are electrically connected to the controller 4. The end of the universal joint 6 of the first drive component 2 away from the geared motor 5 is axially fixedly connected to the upper roll of the short-stress finishing mill 7, and the end of the universal joint 6 of the second drive component 3 away from the geared motor 5 is axially fixedly connected to the lower roll of the short-stress finishing mill 7.

[0035] In this embodiment, one end of the universal joint 6 is fixedly connected to a bushing 61, and the other end is fixedly connected to a hexagonal sleeve 62 for axially fixed connection with the roll head of the upper or lower roll of the short stress precision rolling mill 7; the bushing 61 is axially fixedly connected to the reduction motor 5.

[0036] Specifically, the set distance between the roll head axes of the upper and lower rolls of the short-stress finishing mill 7 needs to meet the target distance for steel rolling production, which is the roll gap distance between the upper and lower rolls of the short-stress finishing mill 7.

[0037] Universal joint 6 is a structure that can transmit rotational motion and torque within a certain tilt angle range. In this embodiment, universal joint 6 is used to connect geared motor 5 and short stress precision rolling mill 7, which can maintain the rotation of geared motor 5 to the upper and lower rolls of the rolling mill when the roll gap is greater than or less than the target gap.

[0038] It should be noted that the short-stress finishing mill 7 is a short-stress mill of model 350 or 380. The maximum roll gap of the short-stress finishing mill 7 is that the distance between the roller head axes of the upper and lower rolls of the short-stress finishing mill 7 is less than the maximum adjustable distance of the hexagonal sleeves 62 of the universal joints 6 of the two drive components. That is, when the universal joint 6 of the first drive component 2 tilts upward at the maximum angle away from the geared motor 5, and the universal joint 6 of the second drive component 3 tilts downward at the maximum angle away from the geared motor 5, the distance between the two hexagonal sleeves 62 is greater than the maximum roll gap of the short-stress finishing mill 7.

[0039] The device of this invention enables auxiliary roll gap measurement or groove welding when the short-stress finishing mill 7 is offline, i.e., when the short-stress finishing mill 7 is not installed on the production line. Then, the short-stress finishing mill 7 after roll gap measurement or groove welding is installed on the production line. For the production process, it can save the time of roll gap measurement or groove welding, reduce the downtime of the production line, and thus improve production efficiency.

[0040] Furthermore, in the prior art, when the backup short-stress finishing mill 7 is replaced, the control of the mill rotation is completed in the control room via the local operation box, which requires multiple people to work together and poses a safety risk. In contrast, the auxiliary device in this embodiment avoids the need for operators to measure the roll gap and weld the rolling groove online, effectively preventing the occurrence of safety accidents.

[0041] Specifically, the device of this invention serves as an auxiliary device. When assisting in roll gap measurement, it drives the upper and lower rolls of the short-stress precision rolling mill 7 to rotate in opposite directions, and then uses measuring wire to measure the roll gap. During groove welding, it drives the upper roll of the short-stress precision rolling mill 7 to rotate, and then uses electric welding and packing wire to weld the groove.

[0042] Preferably, the diameter of the measuring wire is twice the roll gap width of the short stress precision rolling mill 7. When the measuring wire passes through the short stress precision rolling mill 7 and its diameter is reduced by half, the roll gap measurement is qualified. If it is not qualified, the roll gap is adjusted by the pressing device on the short stress precision rolling mill 7. The specific adjustment process will not be described here.

[0043] In one embodiment, the controller 4 includes a first control circuit for simultaneously controlling the geared motors 5 of the first drive assembly 2 and the second drive assembly 3 to rotate in opposite directions, a second control circuit for individually controlling the rotation of the geared motor 5 of the first drive assembly 2, a switch for switching between the first control circuit and the second control circuit according to different operating conditions, a start button, and a stop button.

[0044] The first control circuit is electrically connected to the geared motor 5 of the first drive assembly 2 and the geared motor 5 of the second drive assembly 3. The second control circuit is electrically connected to the geared motor 5 of the first drive assembly 2. Both the first control circuit and the second control circuit are electrically connected to the switch. The start button and the stop button are both connected between the external power supply and the switch.

[0045] When performing roll gap measurement or groove welding, the first control circuit or the second control circuit can be switched to be connected to the external power supply by a switch. The offline short-stress precision rolling mill roll gap measurement and groove welding auxiliary device of this embodiment has two different auxiliary functions and is easy to switch.

[0046] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. An offline auxiliary device for measuring roll gap and welding grooves in a short-stress precision rolling mill, characterized in that, include: Frame (1); A first drive assembly (2) for driving the upper roll of the short stress finishing mill (7) to rotate in the forward direction, the first drive assembly (2) being fixedly connected to the frame (1); A second drive assembly (3) for driving the lower roll of the short stress finishing mill (7) to rotate in the opposite direction, the second drive assembly (3) being fixedly connected to the frame (1); The controller (4) is used to control the first drive assembly (2) and the second drive assembly (3) to simultaneously drive the upper and lower rolls of the short stress finishing mill (7) to rotate in opposite directions for roll gap measurement, or to control the first drive assembly (2) to drive the upper roll of the short stress finishing mill (7) to rotate for groove welding. The first drive assembly (2) and the second drive assembly (3) are both provided with a geared motor (5) and a universal joint (6), one end of the universal joint (6) being axially fixedly connected to the geared motor (5); The distance between the output shaft axes of the two drive components’ geared motors (5) is equal to the set distance between the roller head axes of the upper and lower rolls of the short stress finishing mill (7), and the two drive components’ geared motors (5) are electrically connected to the controller (4). The end of the universal joint (6) of the first drive assembly (2) away from the geared motor (5) is axially fixedly connected to the upper roll of the short stress precision rolling mill (7), and the end of the universal joint (6) of the second drive assembly (3) away from the geared motor (5) is axially fixedly connected to the lower roll of the short stress precision rolling mill (7).

2. The offline short-stress finishing mill roll gap measurement and groove welding auxiliary device according to claim 1, characterized in that, The controller (4) includes a first control circuit for simultaneously controlling the geared motors (5) of the first drive assembly (2) and the second drive assembly (3) to rotate in opposite directions, a second control circuit for individually controlling the rotation of the geared motor (5) of the first drive assembly (2), a switch, a start button, and a stop button for switching the first control circuit and the second control circuit according to different working conditions. The first control circuit is electrically connected to the geared motor (5) of the first drive assembly (2) and the geared motor (5) of the second drive assembly (3), and the second control circuit is electrically connected to the geared motor (5) of the first drive assembly (2). Both the first control circuit and the second control circuit are electrically connected to the switching switch, and both the start button and the stop button are connected between the external power supply and the switching switch.

3. The offline short-stress finishing mill roll gap measurement and groove welding auxiliary device according to claim 2, characterized in that, One end of the universal joint (6) is fixedly connected to a bushing (61), and the other end is fixedly connected to a hexagonal sleeve (62) for axially fixed connection with the roll head of the upper or lower roll of the short stress precision rolling mill (7). The bushing (61) is axially fixedly connected to the geared motor (5).

4. The offline short-stress finishing mill roll gap measurement and groove welding auxiliary device according to claim 3, characterized in that, The frame (1) has a double-layer structure. The drive motor of the first drive assembly (2) is fixedly mounted on the upper layer of the frame (1), and the drive motor of the second drive assembly (3) is fixedly mounted on the lower layer of the frame (1).

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