CN1325182C - Space self-aligning and crossing prevention semi-closed section mill - Google Patents

Abstract

The invention relates to the technical field of metallurgical machinery. Space self-positioning anti-intersection semi-closed section steel rolling mill, using four-row short cylindrical roller bearings and double-row tapered thrust bearings, and installing a ball joint pair between the bearing housing and the frame to form a space self-positioning micro-scale equivalent static determination Roll system; install rolling force double fulcrum force components at the support of the upper and lower roll bearing housings; install threaded jacks between the double fulcrum force components and the side of the stand column to form a geometric containment mechanism that prevents the axes of the upper and lower rolls from crossing . The rolling mill proposed by the present invention has better precision of rolling products, and is a space self-positioning type of a stand-type rolling mill to prevent cross-micro-scale equivalent statically indeterminate roll systems, and ensure that the bearing seat swings following the inclination of the roll neck caused by the bending deformation of the roll Achieve self-positioning of bearings, prevent dynamic micro-scale crossing behavior of rolls under external disturbance torque, minimize axial force, and M-shaped non-parabolic distribution of radial load of rolling bearings to double reduce pressure peaks and equal load for each row to achieve reliable life extension Purpose.

Description

Space self-positioning anti-intersection semi-closed section steel rolling mill

technical field

The invention relates to the technical field of metallurgical machinery, in particular to a space self-positioning anti-intersection semi-closed section steel rolling mill.

Background technique

The semi-closed section steel rolling mill is a typical rolling mill that came out in the 1950s, and is widely used in rough rolling, intermediate rolling of section steel and precision rolling of large and medium-sized steel in small batches with various specifications. Rolling mill bearings adopt Bakelite tile sliding bearings, which are lubricated and cooled with water, and are easy to maintain. Therefore, they still play a huge role in the production of large and medium-sized rods and flats. However, due to the roll bounce value caused by bakelite tile bearings is relatively large compared with the required product tolerance zone and the axial movement is large, it seriously restricts the improvement of product dimensional accuracy, and the yield is low and the cost is high. Therefore, on the premise that the original semi-enclosed frame continues to be used, replacing the bakelite tile bearing with a multi-row rolling bearing is an effective way to improve the dimensional accuracy of the product, less investment, and uninterrupted rolling production.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the semi-closed section steel rolling mill using bakelite sliding bearings, the present invention provides a space self-positioning anti-intersection semi-closed section steel rolling mill using four-row short cylindrical roller bearings. Load and rolling The space self-positioning statically fixed roll system with high-load performance and the control mechanism to prevent roll dynamic crossing and impact enable the rolling mill to run stably under high-load and high-speed conditions. The rolling bearing and roll axial adjustment thread mechanism have a long life. Improve product output and quality, reduce costs.

The technical solution adopted by the present invention to solve the technical problem is: the roll adopts four-row short cylindrical roller bearings and double-row conical thrust bearings to be installed on the bearing housing, and the bearing housing is installed between the two columns of the semi-closed frame ;The spherical pad is installed on the outlet side of the rolling piece of the bearing seat, the ball hinge sub-component is installed between the frame baffle and the bearing seat, and the cylindrical pad is installed between the bearing seat and the pressing mechanism to form a space self-positioning mechanism to ensure that the four rows of rollers Bearings, double-row tapered thrust bearings, bearing sealing mechanisms and roll axial adjustment mechanism thread pairs are required to share loads along the axial and circumferential directions. A threaded jack is installed between the double fulcrum force component and the side of the inlet end of the rack to prevent the axes of the upper and lower rolls from intersecting, to minimize the axial force of the rolls and to prevent the impact of steel biting and throwing. The rolling force double fulcrum component seat is set on the upper and lower bearing seats to change the radial load distribution characteristics of the rolling bearing and reduce the peak pressure to improve the bearing life.

Description of drawings

Fig. 1 is a structural schematic diagram of a space self-positioning anti-intersection semi-closed section steel rolling mill;

Figure 2 is a schematic side view of the space self-positioning anti-intersection semi-closed section steel mill structure;

Fig. 3 is a schematic diagram of the ball hinge sub-mechanism;

Figure 4 is an enlarged view of the ball hinge sub-mechanism;

Fig. 5 is a schematic diagram of a convex spherical pad and a concave spherical pad;

Figure 6 is a schematic diagram of a double fulcrum component seat and a cylindrical pad;

Fig. 7 is a schematic diagram of a pressing mechanism and a bearing seat;

Fig. 8 is a schematic diagram of rolling intermittent empty-load bar system;

Fig. 9 is a schematic diagram of rolling high-load rod system;

Fig. 10 is a schematic diagram of the anti-crossover structure of the threaded jack.

In the above drawings, 1. Tapered thrust bearing, 2. Cylindrical roller bearing, 3. Roller, 4. Bearing housing, 5. Axial baffle, 6. Semi-enclosed frame, 7. Inner horizontal hinge part, 8. .Inner double cylinder hinge part, 9. Inner vertical hinge part, 10. Outer vertical hinge part, 11. Outer double cylinder hinge part, 12. Outer horizontal hinge part, 13. Convex spherical pad, 14. Concave spherical pad, 15. Depression mechanism, 16. Double fulcrum force component seat, 17. Cylindrical pad, 18. Threaded jack.

Detailed ways

Fig. 1 is an embodiment disclosed by the present invention. The nominal diameter of the roll is 600mm, and the space self-positioning anti-intersection semi-closed section steel rolling mill. The roll 3 adopts four-row short cylindrical roller bearings 2 and double-row tapered thrust bearings 1 to be installed on the bearing housing 4, and the bearing housing 4 is installed between the two columns of the semi-closed frame 6.

A convex spherical pad 13 and a concave spherical pad 14 are arranged on the side of the bearing block 4 and the column of the frame 6 under force contact. On the spherical surface pad 13, the contact surface between the convex spherical surface pad 13 and the concave spherical surface pad 14 is a spherical surface, and its center of sphere is the center of the bearing seat 4, which ensures mutual swing.

A ball hinge sub-component is installed between the axial baffle 5 and the bearing seat 4. The inner horizontal hinge part 7 and the inner double-cylindrical hinge part 8 form an inner horizontal self-positioning hinge. The cylindrical surface of the line; the outer horizontal hinge part 12 and the outer double-cylindrical hinge part 11 form an outer horizontal self-positioning hinge, and the contact surface between them is a cylindrical surface whose axis is the vertical line of the bearing seat center. The inner vertical hinge part 9 and the inner double-cylindrical hinge part 8 form an inner vertical self-positioning hinge, and the mutual contact surface is a cylindrical surface whose axis is the axis of the bearing seat bore; the outer vertical hinge part 10 and the outer double-cylindrical hinge part 11 forms the outside vertical self-positioning hinge, and the mutual contact surface is the cylindrical surface whose axis is the axis of the bore of the bearing seat. The axis intersection of the horizontal self-positioning hinge and the vertical self-positioning hinge falls on the 4-axis of the bearing seat, which together form a ball hinge pair to ensure the self-positioning effect in the vertical direction and the horizontal direction.

According to the theoretical analysis of mechanisms, the above-mentioned structure constitutes a micro-scale equivalent static definite rod system mechanism with 2 rods and 3 low pairs of space self-positioning, which realizes the empty load of rolling mill rolls during rolling intervals (see Fig. 8) and rolling high load (see Fig. 8 ). Figure 9) can maintain a statically indeterminate condition in the switching and alternating operating states, ensuring that the bearing seat 4 automatically swings following the inclination of the roll neck space caused by the bending deformation of the roll 3, so that the four-row short cylindrical roller bearing 2 and the double-row tapered thrust bearing 1. The thread pair of the bearing sealing mechanism and the roll axial adjustment mechanism can run for a long time.

A threaded jack 18 is installed on the side of the inlet end of the double fulcrum force component 16, and at the same time, the side of the outlet end of the rolled piece of the double fulcrum force component 16 is pushed against the boss of the bearing seat 4, and the end of the threaded jack 18 is pushed against the column of the frame 6 On the side of the inlet end, tighten the threaded jack 18 to make the bearing seat 4 close to the side of the outlet end of the column of the frame 6, so as to ensure that the dynamic micro-scale cross behavior of the two rolls is prevented under the condition of external disturbance torque and gapped bearing seat, and the axial force minimize.

The pressing mechanism 15 transmits the rolling force P to the bearing housing 4 through the double fulcrum force component 16 and the cylindrical pad 17. The upper end of the double fulcrum force component 16 is in contact with the pressing mechanism 15, and the middle part of the lower end is hollowed out to form two supporting ends. , Cylindrical pad 17 is installed on the bearing housing 4, and the two supporting ends of the double fulcrum force component seat 16 are processed with cylindrical grooves to fit the cylindrical surface of the cylindrical pad 17. In this way, the external load bearing capacity of the bearing housing 4 is divided into two, so that the radial load of the rolling bearing is distributed in an M-shaped non-parabolic shape on the circumference, and the pressure peak value is doubled, and each row is equally loaded.

Practice has proved that this space self-positioning anti-intersection semi-closed section steel mill can prevent the short life of four-row short cylindrical roller bearings, thrust bearings, bearing sealing mechanisms and axial adjustment mechanisms caused by abnormally large rolling forces and axial forces. Sintering accidents, ensure the 3500-hour working life of the four-row short cylindrical roller bearings, improve product precision, reduce the accident rate of the rolling mill and correspondingly increase the operating rate of the rolling mill, reduce spare parts and reduce costs.

Claims (3)

1. A space self-positioning anti-intersection semi-closed section steel mill, comprising rolls (3), bearing housings (4), axial baffles (5), frame (6) and pressing mechanism (15), its characteristics in: The roll (3) adopts four-row short cylindrical roller bearings (2) and double-row tapered thrust bearings (1) installed on the bearing housing (4), and the bearing housing (4) is installed on a semi-closed frame (6) Between the two uprights, a convex spherical pad (13) and a concave spherical pad (14) are installed between the bearing housing (4) and the stressed contact side of the upright of the frame (6), and the axial baffle (5) and The parts of the ball hinge pair are installed between the bearing seats (4), and the parts of the ball hinge pair are in contact with each other in a cylindrical arc, and the relative swing between them is guaranteed; A threaded jack (18) is installed between the side of the column inlet end of the frame (6) and the double fulcrum force component (16), and the other side of the double fulcrum force component (16) pushes against the boss of the bearing seat (4) On; the threaded part of the threaded jack (18) is threadedly engaged with the double fulcrum force component (16), and the head of the threaded jack (18) is pushed against the side of the column of the frame (6); The upper end of the double fulcrum force component (16) is in contact with the pressing mechanism (15), and the middle part of the lower end is hollowed out to form two support ends, and a cylindrical pad is arranged between the double fulcrum force component (16) and the bearing seat (4) (17), the cylinder pad (17) is installed on the bearing seat (4), and the two supporting end ends of the double fulcrum force component (16) process the cylinder groove to contact with the cylinder pad (17). 2. The space self-positioning anti-intersection semi-closed section steel rolling mill according to claim 1, characterized in that: the convex spherical pad (13) is installed in the side wall hole of the bearing seat (4), and the concave spherical pad (14) is Connected on the convex spherical pad (13) by screws, the contact spherical surface between the convex spherical pad (13) and the concave spherical pad (14) takes the center of the bearing seat as the center, and the convex spherical pad (13) and the concave spherical pad (14) Can swing relative to each other. 3. The space self-positioning anti-intersection semi-closed section steel rolling mill according to claim 1, characterized in that: the inner horizontal hinge part (7) and the inner double-cylindrical hinge part (8) form an inner horizontal self-positioning hinge, and the mutual The contact surface between them is a cylindrical surface whose axis is the vertical line of the center of the bearing seat; the outer horizontal hinge part (12) and the outer double-cylindrical hinge part (11) form an outer horizontal self-positioning hinge, and the mutual contact surface is that the axis is the bearing The cylindrical surface of the vertical line of the center of the seat; the inner vertical hinge part (9) and the inner double-cylindrical hinge part (8) form an inner vertical self-positioning hinge, and the mutual contact surface is a cylindrical surface whose axis is the axis of the bore of the bearing seat; The outer vertical hinge part (10) and the outer double-cylindrical hinge part (11) form an outer vertical self-positioning hinge, and the contact surface between them is a cylindrical surface whose axis is the axis of the bore of the bearing seat, and the horizontal self-positioning hinge and the vertical self-positioning hinge The axis intersection point of the hinge falls on the axis of the bearing housing (4) to jointly form a ball hinge pair to ensure the self-positioning effect in the vertical direction and the horizontal direction.

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