Axial adjustment device for rollers

Abstract

The purpose of the present invention is to provide an axial adjustment device for a rolling mill roll that is easy to realize online real-time adjustment, has reliable and accurate transmission, long service life, and low noise, including a servo motor fixed on a rolling mill frame, one end of a telescopic rod is connected to the output shaft of the servo motor, and a driving mechanism is also provided on the rolling mill frame, and the driving mechanism drives the other end of the telescopic rod to engage or disengage with the worm gear provided on the outer ring of the axial adjustment sleeve of the rolling mill roll. The servo motor is directly fixed on the rolling mill frame. Due to the support of the rolling mill frame, the servo motor has a small vibration during operation, and the transmission of the output shaft is stable, and no excess pressure is applied to the meshing of the worm gear. The meshing of the worm gear is stable, the wear is small, the noise is small, and the service life is long.

Description

Technical Field

[0001] The present invention relates to steel rolling equipment, in particular to a device for adjusting the axial position of a rolling mill roll. Background Art

[0002] When processing wire rods, the matching notches on the rolling mill rolls are relied on. If the notches are misaligned or not completely aligned with each other, the rolled products will have quality problems such as cross-sectional shape and dimensional deviations, and in serious cases, scrap products will be rolled out. In view of this, it is necessary to axially adjust the matching pair of rolls to ensure that the matching notches on the rolls are aligned with each other.

[0003] The applicant of the present invention has previously applied for a patent entitled "An axial adjustment device for a rolling mill roll" (patent number: CN102310086B). The outer thread is arranged on the side of the teeth on the outer ring of the axial adjustment sleeve, and the inner thread is arranged on the inner ring of the adjustment positioning ring to form a screw nut. The adjustment positioning ring is fixedly connected to the main bearing seat. The outer end of the worm extends to the outside of the adjustment positioning ring and is connected to the output shaft of the hydraulic motor or servo motor. The controller outputs a control signal to drive the hydraulic motor or servo motor to rotate. However, the hydraulic motor or servo motor is directly and always connected to the outer rod end of the worm, and the hydraulic motor or servo motor is supported by the worm. The hydraulic motor or servo motor will inevitably vibrate when working, which will increase the wear of the worm gear meshing parts, affect the service life, and make a lot of noise. In addition, the hydraulic motor or servo motor rotates due to the vibration during the rolling process and the vibration of the transmission shaft between the worm and the motor, resulting in axial movement of the rolling mill roll and deformation of the hole type of the rolled hole, which will seriously affect the quality of the rolled piece. Summary of the invention

[0004] The purpose of the present invention is to provide an axial adjustment device for a rolling roller which is easy to realize online real-time adjustment and has reliable and accurate transmission, long service life and low noise.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an axial adjustment device for a rolling mill, comprising a servo motor fixed on a rolling mill frame, one end of a telescopic rod being connected to an output shaft of the servo motor, and a driving mechanism being also provided on the rolling mill frame, and the driving mechanism driving the other end of the telescopic rod to engage or disengage with a worm gear provided on an outer ring of an axial adjustment sleeve of the rolling mill.

[0006] By adopting the above scheme, the servo motor is directly fixed on the rolling mill frame. Due to the support of the rolling mill frame, the servo motor has small vibration during operation and stable transmission of the output shaft, and no excess pressure is applied to the meshing of the worm gear. The meshing of the worm gear is smooth, the wear is small, the noise is small, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0008] Figure 2 It is a front view of the present invention;

[0009] Figure 3 for Figure 1 A partially enlarged schematic diagram of . DETAILED DESCRIPTION

[0010] For the sake of ease of explanation and understanding, several basic concepts of direction and position are first explained and defined. The up and down directions refer to the state where the rolls are placed horizontally, and the following description only takes this state as an example. The rolling mill can completely place the rolls vertically for rolling.

[0011] Since the surrounding area of ​​steel during rolling is a safety restricted area, operators cannot make online adjustments during rolling. The solution provided by the present invention makes it possible to achieve online axial adjustment, significantly improving the control and rolling accuracy of steel rolling equipment. It not only provides assembly guarantee for reducing the scrap rate, but also can timely detect whether the product is out of tolerance and quickly make corrections. In addition, it saves a lot of time and reduces the labor intensity of workers. The specific solution is as follows:

[0012] like Figure 1-Figure 3 As shown, an axial adjustment device for a rolling mill includes a servo motor 20 fixed on a rolling mill frame 10, one end of a telescopic rod 30 is connected to the output shaft of the servo motor 20, and a driving mechanism is also provided on the rolling mill frame 10, and the driving mechanism drives the other end of the telescopic rod 30 to engage or disengage with a worm 50 provided on the outer ring of the axial adjustment sleeve of the rolling mill. The servo motor 20 is directly fixed on the rolling mill frame 10. Due to the support of the rolling mill frame 10, the servo motor 20 has a small vibration during operation, and the transmission of the output shaft is stable. No excess pressure is applied to the meshing of the worm gear, and the meshing of the worm gear is stable, the wear is small, the noise is small, and the service life is long. At the same time, the effect of the servo motor 20 as a power mechanism is that the source of the drive signal can be provided by the controller. As long as the controller outputs the drive adjustment signal, the servo motor 20 will respond promptly and accurately, and especially the accuracy and reliability of its adjustment can be guaranteed.

[0013] Considering that the servo motor 20 should be arranged in a position with better stability or in a position to avoid other parts, it is preferred to set the servo motor 20 on the upper part of the rolling mill frame 10, one end of the telescopic rod 30 is connected to the output shaft of the servo motor 20 through the first universal joint 31, and the other end is connected to the second universal joint 32, the second universal joint 32 is connected to the shaft sleeve 61 rotatably arranged on the lifting rod frame 60, and the shaft sleeve 61 is connected to the rod end of the worm 50 with a plug-in key connection or a plug-in square shaft or square hole connection. Through the arrangement of the first universal joint 31 and the second universal joint 32, there is no need to consider the requirement that the output shaft of the servo motor 20 must be located directly above the worm 50 and the two must be collinear. The servo motor 20 can be installed in any position suitable for installing the servo motor 20, and effective power transmission can be guaranteed. In addition to the key connection transmission method, the square shaft, square hole or polygonal shaft transmission method can also be used.

[0014] like Figure 2 As shown, because the worm 50 only moves in the direction of the rod core, the sleeve 61 connected thereto also only needs to move in the direction of the rod core. One end of the lifting rod frame 60 is connected to the rod end of the piston rod 41 of the oil cylinder 40. The rod core of the piston rod 41 is arranged in parallel with the rod core of the worm 50. When the sleeve 61 rotates, it is connected to the overhanging end of the lifting rod frame 60. The oil cylinder 40 drives the length of the telescopic rod 30 to change, so that the sleeve 61 and the worm 50 are matched or disengaged, and the lifting rod frame 60 is set to ensure the translation movement of the sleeve 61.

[0015] Further, in order to smoothly transmit torque, the upper section of the telescopic rod 30 is a spline sleeve 33, the lower section is a spline shaft 34, and the lower end of the spline shaft 34 is connected to the sleeve 61. Here, the upper section is a spline sleeve 33 and the lower end is a spline shaft 34, which can prevent debris and dust from entering the joint between the two and affecting the transmission of torque.

[0016] In order to ensure the accuracy of the sleeve connection between the shaft sleeve 61 and the worm 50 , the shaft sleeve 61 is located directly above the worm 50 , and the shaft core of the shaft sleeve 61 is colinear with the rod core of the worm 50 .

[0017] The worm 50 is arranged on the outer ring of the axial adjustment sleeve of the upper roller bearing seat 70. The outer ring of the axial adjustment sleeve is also provided with teeth to form a worm gear mechanism with the worm 50. The side of the teeth on the outer ring of the axial adjustment sleeve is provided with external threads to cooperate with the internal threads provided on the inner ring of the adjustment positioning ring fixed on the upper roller bearing seat 70 to form a screw nut. The specific structure of the present invention has been discussed in detail by the applicant in the patent entitled "A Roller Axial Adjustment Device" (Patent No.: CN102310086B), which will not be repeated here.

[0018] As an integral roll system, it is integrally pushed into or moved out of the rolling mill frame, and adopts the above-mentioned power mechanism and worm gear to cooperate or disengage, which facilitates the replacement of the roll system and will not interfere with other components.

Claims

1. An axial adjustment device for a roller, characterized in that: The rolling mill frame (10) comprises a servo motor (20) fixed on the rolling mill frame (10), one end of a telescopic rod (30) being connected to an output shaft of the servo motor (20), and a driving mechanism being further provided on the rolling mill frame (10), the driving mechanism driving the other end of the telescopic rod (30) to engage with or disengage from the worm (50) provided on the outer ring of the roller axial adjustment sleeve; The servo motor (20) is arranged on the upper part of the rolling mill frame (10); one end of the telescopic rod (30) is connected to the output shaft of the servo motor (20) through a first universal joint (31); the other end is connected to a second universal joint (32); the second universal joint (32) is connected to a shaft sleeve (61) rotatably arranged on the lifting rod frame (60); the shaft sleeve (61) is connected to the rod end of the worm (50) by a plug-in key connection or a plug-in square shaft or square hole connection; One end of the lifting rod frame (60) is connected to the rod end of the piston rod (41) of the oil cylinder (40), the rod core of the piston rod (41) is arranged in parallel with the rod core of the worm (50), and the shaft sleeve (61) is connected to the overhanging end of the lifting rod frame (60) when rotating.

2. The axial adjustment device for a rolling mill roll according to claim 1, characterized in that: The upper section of the telescopic rod (30) is a spline sleeve (33), and the lower section is a spline shaft rod (34). The lower end of the spline shaft rod (34) is connected to the shaft sleeve (61).

3. The axial adjustment device for a rolling mill roll according to claim 1, characterized in that: The shaft sleeve (61) is located directly above the worm (50), and the shaft core of the shaft sleeve (61) is colinear with the rod core of the worm (50).

4. The axial adjustment device for a rolling mill roll according to claim 1, characterized in that: The worm (50) is arranged on the outer ring of the axial adjustment sleeve of the upper roller bearing seat (70), and the outer ring of the axial adjustment sleeve is also provided with teeth to form a worm gear mechanism with the worm (50), and external threads are arranged beside the teeth on the outer ring of the axial adjustment sleeve to cooperate with internal threads arranged on the inner ring of the adjustment positioning ring fixed on the upper roller bearing seat (70) to form a screw nut.

Images