CN113814270A

CN113814270A - Coiler mandrel with complementary double hydraulic jaws

Info

Publication number: CN113814270A
Application number: CN202111084943.3A
Authority: CN
Inventors: 胡世标; 吴久福; 邓立群; 余峰; 徐天佑; 吴致辉; 尹腾飞
Original assignee: Hunan Kemeida Heavy Industry Co ltd
Current assignee: Hunan Kemeida Heavy Industry Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2021-12-21

Abstract

The invention discloses a complementary double-hydraulic-jaw coiler mandrel, which comprises a pyramid shaft, two jaw sector plates, two sector plates and two jaw mechanisms, wherein the jaw sector plates are arranged on the inclined plane of the pyramid shaft like other sector plates and are connected with the pyramid shaft through a T-shaped key fixed on the pyramid shaft, the jaw sector plates can move radially relative to a main shaft in a consistent manner with other sector plates when the coiler mandrel shrinks, a groove is formed in the top of the arc surface of each jaw sector plate, the jaw mechanisms are embedded in the groove, a return spring is embedded in the right lower part of the center of the groove, and hydraulic cylinders are symmetrically arranged on two longitudinal sides of the return spring. The invention can realize that one winding drum simultaneously meets the winding of thin strips and thick strips with larger span of a strip thickness interval, can realize the synchronous expansion and contraction of the jaw sector plate and the sector plate, can avoid the phenomenon that the inner ring of a steel coil is scratched or taken out by the winding drum to influence the winding shape during the coil stripping, and has clamping force which is much larger than that of the mechanical clamping in the prior art.

Description

Coiler mandrel with complementary double hydraulic jaws

Technical Field

The invention relates to the technical field of rolling equipment for steel rolling, in particular to a coiler mandrel with complementary double hydraulic jaws.

Background

The coiler is an important device on a strip continuous production line and mainly comprises a coiler drum and a gear box. The cold rolling coiler mandrel determines whether to be provided with a belt coiler aid or a jaw device according to the thickness of the strip, wherein the jaw device mainly comprises a mechanical jaw and a hydraulic jaw and is used for leading in the strip steel and clamping a strip head, then the strip steel is tensioned with a rolling mill or other process equipment, and the strip is normally coiled under the action of the rotation of the mandrel. For the strip thickness interval of a common production line, the use requirement can be met by adopting one jaw. However, for hot rolling flattening (finishing) or annealing pickling line with large span of strip thickness interval, one jaw can not meet production requirements, and the problem can be solved only by replacing a jaw strip or replacing a jaw device.

Disclosure of Invention

In view of the above technical problems in the related art, the present invention provides a complementary dual hydraulic jaw coiler drum, which can overcome the above disadvantages in the prior art.

In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:

the utility model provides a two hydraulic pressure of complementary type coiler drums that keep silent, includes the pyramid axle, equal swing joint has the sector plate of keeping silent about the pyramid axle, equal swing joint has the sector plate about the pyramid axle, keep silent the sector plate and the cambered surface at sector plate top is in same periphery, the level four step inclined plane of pyramid axle periphery with keep silent the sector plate and the level four step inclined plane phase-match of sector plate bottom, keep silent the sector plate and every grade inclined plane of sector plate bottom all the symmetry is equipped with a pair of T type keyway, T type keyway all sliding connection has T type key, T type key pass through the screw with the inclined plane fixed connection of pyramid axle, keep silent sector plate top center and set up flutedly, inlay in the recess and be equipped with the mechanism of keeping silent, will when keeping silent the mechanism and pressing from both sides tightly the sector plate supplyes the arc surface.

Preferably, a left fixed jaw plate is arranged on the left side of the top of the jaw mechanism, a right fixed jaw plate is arranged on the right side of the top of the jaw mechanism, a movable jaw strip is arranged in the middle of the jaw mechanism, and the movable jaw strip is clamped between the left fixed jaw plate and the right fixed jaw plate when the jaw mechanism clamps.

Preferably, the left fixed jaw plate and the right fixed jaw plate are both fixed on the jaw sector plate through screws.

Preferably, the right end of the left fixed jaw plate is provided with a protruding sawtooth inclined plane A, and the left end of the top of the movable jaw strip is provided with a sawtooth inclined plane B matched with the sawtooth inclined plane A.

Preferably, the bottom of the groove is provided with a blind hole, a reset spring is embedded in the blind hole, a reset screw penetrates through the center of the reset spring, a baffle is arranged at the top of the blind hole, the reset spring is clamped between the baffle and the reset screw base, and the top of the reset screw penetrates through the baffle and is fixedly connected with the bottom of the movable jaw strip.

Preferably, two hydraulic cylinders are symmetrically arranged on two sides of the return spring, and piston rods of the hydraulic cylinders are abutted to the bottom surface of the movable jaw strip.

Preferably, the jaws of the jaw mechanism above the pyramid shaft are smaller than the jaws of the jaw mechanism below the pyramid shaft.

The invention has the beneficial effects that:

(1) the winding drum has the main advantages that two jaw devices which are arranged in the same direction and are separated by 180 degrees are designed in the circumferential direction of the sector plates, the opening degrees of the jaws are different, and strips with different thicknesses introduced in the same direction and the same position can be received, bitten and clamped.

(2) The jaw sector plate designed by the invention is arranged on the inclined plane of the pyramid shaft like other sector plates, is connected with the pyramid shaft through the T-shaped key fixed on the pyramid shaft, and makes radial movement relative to the main shaft together with the other sector plates, so that synchronous expansion and contraction are realized, and the phenomenon that the inner ring of a steel coil is scratched or taken out by a winding drum to influence the coil shape during coil unloading is avoided.

(3) The jaw designed by the invention is closer to the arc surface, the length of the clamped steel plate is shorter, and the waste of the steel plate can be reduced; both sides of the jaw are provided with sawteeth (a sawteeth inclined plane A and a sawteeth inclined plane B), so that the clamping pressure is increased.

(4) The jaw mechanism designed by the invention is provided with a special radial hydraulic cylinder, and the clamping force of the jaw mechanism is much larger than that of a mechanical jaw.

(5) The jaw mechanism designed by the invention has the advantages that the jaws are large and small, and one winding drum can simultaneously meet the requirement of winding a thin strip and a thick strip with large span of a strip thickness interval.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a front partial cross-sectional view of a coiler drum;

FIG. 2 is a side cross-sectional view of a coiler drum at true circle (maximum circle, with hydraulic cylinders arranged);

FIG. 3 is a side cross-sectional view of the coiler drum as it is being reduced (minimum circle, with return spring arranged);

FIG. 4 is a schematic view at I of FIG. 2 with the jaws open;

FIG. 5 is a schematic view at II in FIG. 2 with the jaws open;

FIG. 6 is a schematic view at III in FIG. 3 with the jaws open;

FIG. 7 is a cross-sectional view of the jaw sector plate of FIG. 2;

in the figure: 1. a pyramid axis; 2. a jaw sector plate; 3. a sector plate; 4. a T-shaped key slot; 5. a T-shaped bond; 6. a groove; 7. a jaw mechanism; 701. a left fixed jaw plate; 702. a right fixed jaw plate; 703. a movable jaw bar; 8. a return spring; 9. a reset screw; 10. a baffle plate; 11. a hydraulic cylinder; 1101. a piston rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

As shown in fig. 1-3, the complementary type coiler mandrel with double hydraulic jaws according to the embodiment of the present invention comprises a pyramid shaft 1, jaw sector plates 2 are movably connected to the upper and lower sides of the pyramid shaft 1, sector plates 3 are movably connected to the left and right sides of the pyramid shaft 1, the top arc surfaces of the jaw sector plates 2 and the sector plates 3 are located on the same circumferential surface, four-step inclined surfaces on the periphery of the pyramid shaft 1 are matched with the four-step inclined surfaces on the bottoms of the jaw sector plates 2 and the sector plates 3, a pair of T-shaped key grooves 4 are symmetrically arranged on each of the bottom inclined surfaces of the jaw sector plates 2 and the sector plates 3, the T-shaped key grooves 4 are slidably connected with T-shaped keys 5, the T-shaped keys 5 are fixedly connected with the inclined surfaces of the pyramid shaft 1 through screws, a groove 6 is arranged at the center of the top of the jaw sector plates 2, a jaw mechanism 7 is embedded in the groove 6, when the jaw mechanism 7 clamps, the jaw sector plate 2 is supplemented into an arc surface.

As shown in fig. 4-5, a left fixed jaw plate 701 is arranged on the left side of the top of the jaw mechanism 7, a right fixed jaw plate 702 is arranged on the right side of the top of the jaw mechanism 7, a movable jaw strip 703 is arranged in the middle of the jaw mechanism 7, and the movable jaw strip 703 is clamped between the left fixed jaw plate 701 and the right fixed jaw plate 702 when the jaw mechanism 7 clamps; the left fixed jaw plate 701 and the right fixed jaw plate 702 are both fixed on the jaw sector plate 2 through screws; the right end of the left fixed jaw plate 701 is provided with a protruding sawtooth inclined plane A, and the left end of the top of the movable jaw strip 703 is provided with a sawtooth inclined plane B matched with the sawtooth inclined plane A.

As shown in fig. 6-7, a blind hole is formed in the bottom of the groove 6, a return spring 8 is embedded in the blind hole, a return screw 9 penetrates through the center of the return spring 8, a baffle 10 is arranged at the top of the blind hole, the return spring 8 is clamped between the baffle 10 and a base of the return screw 9, and the top of the return screw 9 penetrates through the baffle 10 and is fixedly connected with the bottom of the movable jaw bar 703.

As shown in fig. 1, 4 and 5, two hydraulic cylinders 11 are symmetrically arranged on both sides of the return spring 8, and a piston rod 1101 of each hydraulic cylinder 11 abuts against the bottom surface of the movable jaw bar 703; the jaw of the jaw mechanism 7 above the pyramid shaft 1 is smaller than the jaw of the jaw mechanism 7 below the pyramid shaft 1.

In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.

The invention aims to provide a coiler mandrel with complementary double hydraulic jaws, which can realize that one mandrel can simultaneously meet the coiling of thin strips and thick strips with larger span of a strip thickness interval.

The specific preparation method comprises the following steps:

the jaw structure comprises a pyramid shaft 1, jaw sector plates 2, sector plates 3 and a jaw mechanism 7, wherein the upper parts of the jaw sector plates 2 and the sector plates 3 are in arc surface structures, the arc surface structures are in direct contact with a strip, a plurality of groups of inclined surfaces at the bottoms of the jaw sector plates are in contact with the inclined surfaces of the pyramid shaft to transmit expansion force, and a pair of T-shaped keys 5 are respectively arranged in the middle of each group of inclined surfaces and fixed on the pyramid shaft 1 through screws to transmit contraction force.

A stepped blind hole with a large upper part and a small lower part is formed in the center of the groove 6 of the sector plate 3, and a return spring 8 is arranged in the stepped blind hole; the groove 6 is provided with a jaw mechanism 7 which comprises a left fixed jaw plate 701, a right fixed jaw plate 702 and a movable jaw strip 703, the movable jaw strip 703 is clamped between the left fixed jaw plate 701 and the right fixed jaw plate 702, the left fixed jaw plate 701 and the right fixed jaw plate 702 are respectively fixed on the jaw sector plate 2 by screws, the upper part of the left fixed jaw plate 701 is provided with a protruding sawtooth inclined plane, the upper part of the movable jaw strip 703 is provided with a sawtooth inclined plane matched with the left fixed jaw plate 701, and a reset screw 9 passes through a reset spring 8 and is screwed into the movable jaw strip 703, so that the bottom surface of the movable jaw strip 703 coincides with the bottom surface of the groove 6.

Radial hydraulic cylinders 11 are symmetrically arranged on two sides of each return spring 8 along the central line of the groove 6, the radial hydraulic cylinders 11 are arranged in corresponding holes in the bottom surface of the groove 8, and a piston rod 1101 of each radial hydraulic cylinder 11 is abutted against the bottom surface of the movable jaw strip 703.

When in specific use:

when the plate is rolled, the pyramid shaft 1 is driven by the expansion cylinder to move axially, the main inclined plane pushes the jaw sector plate 2 and the sector plate 3 to move radially, and the jaw sector plate 2 and the sector plate 3 expand and contract synchronously. Under the action of the stroke of the expansion cylinder, the winding drum expands to a true circle (maximum circle). At this time, the hydraulic cylinder 11 of the jaw is in a pressure relief state, and the movable jaw bar 703 is opened by the (rebound) action of the return spring 8 in a compression state. After the hydraulic cylinder 11 is pressurized, the piston rod 1101 of the hydraulic cylinder pushes the movable jaw strip 703 to move radially outwards, and the jaws are clamped.

When the reel is unloaded to roll up, 11 pressure releases of pneumatic cylinder, and reset spring 8 kick-backs, drives movable vice mouthful strip 703 and moves down, keeps silent and opens, loosens belted steel head, and pyramid shaft 1 is moving back under the effect of breathing hydro-cylinder, and T type key 5 is drawing keeping silent sector plate 2 and sector plate 3 return and is dwindling to the minimum circle, makes to have sufficient clearance between coil of strip and the reel, avoids the scratch of coil of strip.

In conclusion, the invention can realize that one winding drum simultaneously meets the winding of thin strips and thick strips with larger span of the strip thickness interval, can realize the synchronous expansion and contraction of the jaw sector plates and the sector plates, can avoid the phenomenon that the inner ring of a steel coil is scratched or taken out by the winding drum to influence the winding shape during the coil stripping, and has a clamping force which is much larger than that of the mechanical clamping in the prior art.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a coiler mandrel of two hydraulic pressure of complementary type keep in touch, its characterized in that, includes pyramid axle (1), equal swing joint has keep in touch sector plate (2) from top to bottom pyramid axle (1), equal swing joint has sector plate (3) about pyramid axle (1), keep in touch sector plate (2) and the cambered surface at sector plate (3) top is in same periphery, the level four ladder inclined plane of pyramid axle (1) periphery with keep in touch sector plate (2) and the level four ladder inclined plane phase-match of sector plate (3) bottom, keep in touch sector plate (2) and every grade inclined plane of sector plate (3) bottom all the symmetry is equipped with a pair of T type keyway (4), equal sliding connection has T type key (5) in T type keyway (4), T type key (5) through the screw with the inclined plane fixed connection of pyramid axle (1), keep in touch sector plate (2) top center set up fluted (6), a jaw mechanism (7) is embedded in the groove (6), and when the jaw mechanism (7) is clamped, the jaw sector plate (2) is supplemented into an arc surface.

2. The coiler drum according to claim 1, characterized in that a left fixed jaw plate (701) is arranged on the left side of the top of said jaw mechanism (7), a right fixed jaw plate (702) is arranged on the right side of the top of said jaw mechanism (7), a movable jaw strip (703) is arranged in the middle of said jaw mechanism (7), and said movable jaw strip (703) is clamped between said left fixed jaw plate (701) and said right fixed jaw plate (702) when said jaw mechanism (7) is clamped.

3. Coiler drum according to claim 2, characterized in that said left (701) and right (702) fixed jaw plates are each fixed to said jaw sector plate (2) by means of screws.

4. The coiler drum according to claim 3, characterized in that the right end of the left fixed jaw plate (701) is provided with a protruding saw tooth bevel A and the left end of the top of the movable jaw bar (703) is provided with a saw tooth bevel B matching the saw tooth bevel A.

5. The coiler drum according to claim 4, characterized in that a blind hole is provided at the bottom of the groove (6), a return spring (8) is embedded in the blind hole, a return screw (9) is provided through the center of the return spring (8), a baffle (10) is provided at the top of the blind hole, the return spring (8) is clamped between the baffle (10) and the base of the return screw (9), and the top of the return screw (9) passes through the baffle (10) and is fixedly connected with the bottom of the movable jaw bar (703).

6. Coiler drum according to claim 5, characterized in that said return spring (8) is bilaterally symmetrically provided with two hydraulic cylinders (11), the piston rods (1101) of said hydraulic cylinders (11) being against the bottom surface of said movable jaw bar (703).

7. Coiler drum according to any of the claims 1-6, characterized in that the jaws of the jaw mechanism (7) above the pyramid shaft (1) are smaller than the jaws of the jaw mechanism (7) below the pyramid shaft (1).