CN1325182C

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

Info

Publication number: CN1325182C
Application number: CNB2005100136534A
Authority: CN
Inventors: 申光宪; 李明; 徐言忠; 朱凤华; 李志强
Original assignee: Yanshan University
Current assignee: Zhongzhong Science and Technology Tianjin Co Ltd
Priority date: 2005-05-31
Filing date: 2005-05-31
Publication date: 2007-07-11
Anticipated expiration: 2025-05-31
Also published as: CN1721095A

Abstract

The present invention relates to a space self aligning crossing prevention semienclosed section mill, which belongs to the technical field of metallurgical machinery. The present invention adopts four arrays of short cylindrical roller bearings and double arrays of conical thrust bearings, wherein a spherical hinge pair is arranged between a bearing seat and a machine frame to form a space self aligning micro scale equivalent statically determinate roller system; a component force seat with double fulcra for rolling force is arranged at a supporting point of the bearing seat of an upper roller and a lower roller; a screw thread jack is arranged between the component force seat with double fulcra and the side surface of an upright post of the machine frame to form a geometric draughting mechanism used for preventing the upper roller and the lower roller from crossing. The section mill provided by the present invention has high accuracy of rolled products. The present invention provides space self aligning micro scale equivalent statically determinate roller system used for preventing crossing for machine frame type rolling mills, and ensures that the bearing seat swings along the incline of a roller neck caused by the bending deformation of the roller in order to realize the self alignment of bearings. The roller under the outer perturbed moment avoids a dynamic micro scale crossing phenomenon in order that an axial force is minimum and the radial load of a rolling bearing is in an M-shaped non parabola distribution, so the pressure peak value is exponentially reduced, and easy array has uniform load in order to realize the goal of reliable lifetime extension.

Description

Space self-aligning and crossing prevention semi-closed section mill

Technical field

The present invention relates to technical field of metallurgical machinery, particularly relate to a kind of space self-aligning and crossing prevention semi-closed section mill.

Background technology

Semi-closed section mill is the typical milling train that comes out the fifties in last century, be widely used in the shaped steel roughing, in roll and the close Rolling Production of the big-and-middle-sized aluminium of many descriptions small lot.Rolling mill bearing adopts the bakelite tile sliding bearing, with water lubrication and cooling, convenience easy to maintenance, thereby is still bringing into play huge effect in big-and-middle-sized excellent flat bar production so far.Yet, because the required relatively goods tolerance range of the roll bouncing value that the bakelite tile bearing causes requires big and axial string momentum is big, seriously restrict the raising of product's dimensional precision, and lumber recovery being lower, cost is higher.Therefore, continuing to keep under the use prerequisite in original semi-enclosed frame, is the effective way that improves product's dimensional precision, small investment, do not interrupt Rolling Production with multiple row rolling bearing displacement bakelite tile bearing.

Summary of the invention

In order to overcome the above-mentioned deficiency of the semi-closed section mill that adopts the bakelite tile sliding bearing, the invention provides a kind of space self-aligning and crossing prevention semi-closed section mill that adopts four row short cylindrical roller shaft to hold, this milling train has the space self-aligning static determinacy roller system of adaptation unloaded lotus at rolling intermittence and rolling top load performance of operating condition and prevents that roll from dynamically intersecting and the controlling organization of impact, make milling train stable operation under the top load high-speed working condition, rolling bearing and roll axial adjustment thread mechanism longevity, improve product yield and quality, reduce cost.

The technical solution adopted for the present invention to solve the technical problems is: roll adopts four row short cylindrical roller shaft to hold with biserial circular cone thrust bearing and is installed on the bearing block, and bearing block is installed between two columns of semi-enclosed frame; Bearing block rolled piece outlet side mounting spherical pad, the secondary parts of spherical hinge are installed between frame baffle plate and the bearing block, the cylinder pad is installed between bearing block and screw-down, constitute space self-aligning mechanism, circumferentially all carry requirement to guarantee that four row roller bearings, biserial circular cone thrust bearing, bearing sealing device and roll axial regulating mechanism screw thread pair reach vertically.The screw thread jack is installed between two fulcrum component seats and the frame arrival end side is intersected, make the minimum and impulsive force generation when preventing to sting steel and getting rid of steel of roll axial force to prevent upper and lower roll axis.The two fulcrum component seats of roll-force are set on upper and lower bearing block, change rolling bearing radial load distribution character, reduce pressure peak to improve bearing life.

Description of drawings

Fig. 1 is the space self-aligning and crossing prevention semi-closed section mill structural representation;

Fig. 2 is a space self-aligning and crossing prevention semi-closed section mill structure schematic side view;

Fig. 3 is the secondary structural scheme of mechanism of spherical hinge;

Fig. 4 is the secondary mechanism of a spherical hinge enlarged drawing;

Fig. 5 is protruding ball ring and concave spherical surface pad schematic diagram;

Fig. 6 is two fulcrum component seats and cylinder pad schematic diagram;

Fig. 7 is screw-down and bearing block schematic diagram;

Fig. 8 is a unloaded lotus leverage structural scheme of mechanism at rolling intermittence;

Fig. 9 is rolling top load leverage structural scheme of mechanism;

Figure 10 is the anti-chi structure schematic diagram of screw thread jack.

In above-mentioned accompanying drawing, 1. circular cone thrust bearing, 2. cylinder roller bearing, 3. roll, 4. bearing block, 5 axial baffles, 6. semi-enclosed frame, 7 inboard falling hinger parts, 8. inboard bicylindrical hinge member, 9. inboard vertical hinge parts, 10. outside vertical hinge member, 11. outside bicylindrical hinge members, 12. outside falling hinger parts, 13. protruding ball ring, 14. concave spherical surface pads, 15. screw-downs, 16. two fulcrum component seats, 17. cylinder pads, 18. screw thread jack.

The specific embodiment

Fig. 1 is an embodiment disclosed by the invention.The roll nominal diameter is the semiclosed shaped steel milling train of the anti-intersection of the space self-aligning of 600mm specification.Roll 3 adopt four row short cylindrical roller shafts hold 2 and biserial circular cone thrust bearing 1 be installed on the bearing block 4, bearing block 4 is installed between two columns of semi-enclosed frame 6.

Bearing block 4 is provided with protruding ball ring 13 and concave spherical surface pad 14 with the stressed side that contacts of the column of frame 6, protruding ball ring 13 is installed in bearing block 4 areoles by screw, 14 on concave spherical surface pad is connected on the protruding ball ring 13 by screw, contact-making surface between protruding ball ring 13 and the concave spherical surface pad 14 is a sphere, its centre of sphere is bearing block 4 centers, guarantees can swing each other.

The secondary parts of spherical hinge are installed between axial baffle 5 and the bearing block 4, and inboard falling hinger parts 7 form inboard horizontal self-alignment hinge with inboard bicylindrical hinge member 8, and contact-making surface each other is that axis is the face of cylinder of bearing block center vertical line; Outside falling hinger parts 12 form the horizontal self-alignment hinge in the outside with outside bicylindrical hinge member 11, and contact-making surface each other is that axis is the face of cylinder of bearing block center vertical line.Inboard vertical hinge parts 9 form inboard vertical self-alignment hinge with inboard bicylindrical hinge member 8, and contact-making surface each other is that axis is the face of cylinder of bearing block axis of bore; Outside vertical hinge member 10 forms outside vertical self-alignment hinge with outside bicylindrical hinge member 11, and contact-making surface each other is that axis is the face of cylinder of bearing block axis of bore.The crossing point of axes of horizontal self-alignment hinge and vertical self-alignment hinge drops on bearing block 4 axis, forms the spherical hinge pair jointly, guarantees the self-alignment effect of vertical direction and horizontal direction.

According to the theory of mechanisms theory analysis, said structure constitutes 2 bars, 3 lower pair space self-aligning minute yardsticks equivalence static determinacy leverage mechanism, the realization roller system of rolling mill can both keep static condition at the switching alternate run state of rolling intermittence unloaded lotus (see figure 8) and rolling top load (see figure 9), guarantee that bearing block 4 follows the roll neck space that roll 3 flexural deformations cause and tilt and swing automatically, thereby four row short cylindrical roller shaft holds 2, biserial circular cone thrust bearing 1, bearing sealing device and roll axial regulating mechanism screw thread pair can long-lived move.

Screw thread jack 18 is installed on two fulcrum component seats 16 arrival end sides, simultaneously two fulcrum component seat 16 rolled piece port of export sides withstand on the boss of bearing block 4, screw thread jack 18 ends withstand on the column arrival end side of frame 6, make bearing block 4 be close to the column port of export side of frame 6 by threaded together jack 18, with guarantee outside disturbance torque and the bearing block state of misunderstanding each other under, prevent the behavior of the dynamic minute yardstick intersection of two rolls, axial force is minimized.

Screw-down 15 passes to bearing block 4 by two fulcrum component seats 16 and cylinder pad 17 with roll-force P, two fulcrum component seats 16 upper ends contact with screw-down 15, the middle part, lower end hollows out and forms two support ends, cylinder pad 17 is installed on the bearing block 4, and two supported end ends of two fulcrum component seats 16 process the face of cylinder of face of cylinder groove and cylinder pad 17 and fit.External applied load carrying with bearing block 4 is divided into two thus, realizes being on the rolling bearing radial load circumference the non-parabolic type of M type and distributes, and reduce pressure peak at double, and every row carries all.

Facts have proved that this space self-aligning and crossing prevention semi-closed section mill realizes preventing that the four row short cylindrical roller shaft that unusual super large roll-force and axial force cause holds, thrust bearing, bearing sealing device and the short-lived sintering accident of axial regulating mechanism screw thread pair, guarantee that four row short cylindrical roller shaft holds 3500 hours working lives, improve the goods precision, reduce milling train accident rate and corresponding raising operating rate of rolling mill, reduce spare unit and reduce cost.

Claims

1. a space self-aligning and crossing prevention semi-closed section mill comprises roll (3), bearing block (4), axial baffle (5), frame (6) and screw-down (15), it is characterized in that:

Roll (3) adopts four row short cylindrical roller shaft to hold (2) and biserial circular cone thrust bearing (1) is installed on the bearing block (4), bearing block (4) is installed between two columns of semi-enclosed frame (6), bearing block (4) is equipped with protruding ball ring (13) and concave spherical surface pad (14) with stressed contact of the column of frame (6) between the side, the parts of spherical hinge pair are installed between axial baffle (5) and the bearing block (4), contact with the cylinder circular arc between the parts of spherical hinge pair, and guarantee swing relatively each other;

Between the column arrival end side of frame (6) and the two fulcrum component seat (16) screw thread jack (18) is installed, the opposite side of two fulcrum component seats (16) withstands on the boss of bearing block (4); Screw thread jack (18) threaded portion and two fulcrum component seat (16) screw-threaded engagement, screw thread jack (18) head withstands on the side of the column of frame (6);

Two fulcrum component seats (16) upper end contacts with screw-down (15), its lower end mid portion hollows out and forms two support ends, between two fulcrum component seats (16) and the bearing block (4) cylinder pad (17) is set, cylinder pad (17) is installed on the bearing block (4), and two supported end ends of two fulcrum component seats (16) process face of cylinder groove to contact with cylinder pad (17).

2. space self-aligning and crossing prevention semi-closed section mill according to claim 1, it is characterized in that: protruding ball ring (13) is installed in the areole of bearing block (4), concave spherical surface pad (14) then is connected on the protruding ball ring (13) by screw, contact sphere between protruding ball ring (13) and the concave spherical surface pad (14) is the center of circle with the bearing block center, and protruding ball ring (13) can be swung each other relatively with concave spherical surface pad (14).

3. space self-aligning and crossing prevention semi-closed section mill according to claim 1, it is characterized in that: inboard falling hinger parts (7) form inboard horizontal self-alignment hinge with inboard bicylindrical hinge member (8), and contact-making surface each other is that axis is the face of cylinder of bearing block center vertical line; Outside falling hinger parts (12) form the horizontal self-alignment hinge in the outside with outside bicylindrical hinge member (11), and contact-making surface each other is that axis is the face of cylinder of bearing block center vertical line; Inboard vertical hinge parts (9) form inboard vertical self-alignment hinge with inboard bicylindrical hinge member (8), and contact-making surface each other is that axis is the face of cylinder of bearing block axis of bore; Outside vertical hinge member (10) forms outside vertical self-alignment hinge with outside bicylindrical hinge member (11), contact-making surface each other is that axis is the face of cylinder of bearing block axis of bore, the crossing point of axes of horizontal self-alignment hinge and vertical self-alignment hinge drops on bearing block (4) axis, the common spherical hinge pair that forms guarantees the self-alignment effect of vertical direction and horizontal direction.