A stretch-reel for a metallurgical cold rolling mill

Abstract

The utility model belongs to cold rolling mill technical field especially is a kind of for metallurgical cold rolling mill to expand and contract reel. Including spindle;Four pyramid, movable sleeve is set to the outside of spindle, its surface is provided with multiple groups of inclined boss;Expansion and contraction oil cylinder, its piston rod one end is inserted into the inside of spindle and drives and connects four pyramid;Multiple sector plates, annular covering four pyramid, sector plate inside is provided with the inclined recess matched with inclined boss. The utility model realizes radial expansion and contraction by expansion and contraction oil cylinder drive inclined plane sliding pair, forms the detachable connection structure with steel roll, realizes the integral hoisting function of steel roll and reel, completely solves the technological problem that traditional fixed reel must be on-line uncoiling, adopts four pyramid and sector plate linkage mechanism cooperation axial hydraulic drive, while ensuring radial expansion and contraction accuracy, its interlocking sector plate structure ensures that stable cylindrical surface is formed after expansion, axial limiting structure formed by cross ring and notch effectively prevents work from moving.

Description

Technical Field

[0001] This utility model relates to the field of cold rolling mill technology, specifically to an expansion and contraction drum for metallurgical cold rolling mills. Background Technology

[0002] A cold rolling mill is a device that rolls metal at room temperature. It produces high-precision ribbed steel bars or thin plates by cold working hot-rolled wire rods / round bars.

[0003] Most existing cold rolling mills use fixed drums, which cannot be unloaded with the steel coil, and solid drums are difficult to remove offline, resulting in the problem of occupying the drum.

[0004] Therefore, we propose an expansion and contraction drum for metallurgical cold rolling mills to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an expansion and contraction drum for metallurgical cold rolling mills, which solves the problems mentioned in the background art, such as the inability of fixed drums to be unloaded with steel coils and the difficulty of removing solid drums offline.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0009] An expansion and contraction drum for a metallurgical cold rolling mill, comprising:

[0010] spindle;

[0011] A square pyramid with a movable sleeve located outside the main shaft, and multiple sets of inclined bosses on its surface;

[0012] The expansion and contraction cylinder has one end of its piston rod inserted into the main shaft and connected to a four-sided pyramidal drive.

[0013] Multiple sector plates, which annularly cover a four-sided pyramid, are provided with oblique grooves on the inner side of the sector plates that cooperate with the oblique bosses;

[0014] When the expansion and contraction cylinder drives the four-sided pyramid to move axially, the sector plate expands and contracts radially synchronously through the cooperation of the inclined boss and the inclined groove.

[0015] Furthermore, the piston rod is connected to a quadrangular pyramid via a long key, and the surface of the main shaft is provided with an oblong hole that allows the long key to slide axially.

[0016] Furthermore, the inclined groove is provided with a T-shaped groove with the same inclination, and the inclined boss and the T-shaped groove form a sliding pair with the same inclination through a T-key.

[0017] Furthermore, each of the fan-shaped plates is provided with an interlocking structure on both sides of its circumference. The interlocking structure includes a boss on the first side and a groove on the second side that is complementary in shape to the boss. Adjacent fan-shaped plates form a continuous cylindrical surface through the engagement of the boss and the groove, and maintain axial linkage during radial expansion.

[0018] Furthermore, two cross rings are snapped onto the main shaft by a square key, and notches are provided at both ends of the sector plate. The extended ends of the cross rings extend into the notches, forming an axial limiting structure with the ends of the sector plate.

[0019] Furthermore, copper sleeves are nested inside both ends of the square pyramid, and the copper sleeves are slidably connected to the surface of the main shaft. End caps for limiting the position of the copper sleeves are also fixed at both ends of the square pyramid.

[0020] Furthermore, it also includes a cross-ring lock nut, which is located on the side of the cross ring away from the sector plate and is fixedly sleeved with the main shaft.

[0021] Furthermore, the cylinder body of the expansion and contraction cylinder is fixed to one end of the main shaft, the other end of the main shaft is provided with a transmission gear, and one end of the expansion and contraction cylinder is provided with a rotary joint.

[0022] Furthermore, two bearing seats are symmetrically fitted on the main shaft, and the two bearing seats are respectively connected to one side of two cross-ring lock nuts.

[0023] Furthermore, there are four sets of inclined protrusions, and four fan-shaped plates, each corresponding to one of the four sets of inclined protrusions. Each set of inclined protrusions has no fewer than three protrusions, and the number of inclined grooves on one side of each fan-shaped plate is the same as the number of one set of inclined protrusions and they are one-to-one.

[0024] (III) Beneficial Effects

[0025] Compared with the prior art, this utility model provides an expansion and contraction drum for a metallurgical cold rolling mill, which has the following beneficial effects:

[0026] This invention achieves radial expansion and contraction by driving an inclined sliding pair with an expansion and contraction cylinder, forming a detachable connection structure with the steel coil. This enables the overall hoisting function of the steel coil and the drum, completely solving the process problem of online unloading required by traditional fixed drums. The invention employs a linkage mechanism of a four-sided pyramid and a sector plate in conjunction with axial hydraulic drive. While ensuring the accuracy of radial expansion and contraction, the interlocking sector plate structure ensures the formation of a stable cylindrical surface after expansion. The axial limiting structure composed of a cross ring and a notch effectively prevents movement during operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the sector-shaped plate structure of this utility model;

[0028] Figure 2 This is a cross-sectional view of the main shaft structure of this utility model;

[0029] Figure 3 This is an exploded view of the main shaft structure of this utility model;

[0030] Figure 4 This is an exploded view of the main shaft structure of this utility model;

[0031] Figure 5 This is a schematic diagram of the radial expansion state of the sector plate of this utility model.

[0032] In the diagram: 1. Spindle; 11. Waist-shaped hole; 12. Square key; 13. Cross ring; 131. Extension end; 2. Four-sided pyramid; 21. Angled boss; 22. T-key; 23. Copper sleeve; 24. End cover; 3. Expansion cylinder; 31. Piston rod; 32. Long key; 4. Sector plate; 41. Angled groove; 42. T-slot; 43. Boss; 44. Slot; 45. Notch; 5. Cross ring lock nut; 6. Transmission gear; 7. Rotary joint; 8. Bearing seat. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0034] like Figure 1-5 As shown, one embodiment of this utility model provides an expansion and contraction drum for a metallurgical cold rolling mill, comprising:

[0035] Spindle 1;

[0036] The square pyramid 2 has a movable sleeve located outside the main shaft 1, and its surface is provided with multiple sets of inclined bosses 21.

[0037] The expansion and contraction cylinder 3 has one end of its piston rod 31 inserted into the main shaft 1 and connected to the four-sided pyramid 2 for transmission.

[0038] Multiple sector plates 4 are annularly enclosing the quadrangular pyramid 2, and the inner side of the sector plates 4 is provided with oblique grooves 41 that cooperate with the oblique boss 21;

[0039] When the expansion and contraction cylinder 3 drives the four-sided pyramid 2 to move axially, the sector plate 4 expands and contracts radially synchronously through the cooperation of the inclined boss 21 and the inclined groove 41.

[0040] Radial expansion and contraction are achieved by driving the inclined sliding pair through the expansion and contraction cylinder 3, forming a detachable connection structure with the steel coil. This realizes the overall hoisting function of the steel coil and the drum, completely solving the process problem of online unloading required by traditional fixed drums. The four-sided pyramid 2 and the sector plate 4 linkage mechanism are used in conjunction with axial hydraulic drive. While ensuring the accuracy of radial expansion and contraction, the interlocking sector plate 4 structure ensures that a stable cylindrical surface is formed after expansion. The axial limiting structure composed of the cross ring 13 and the notch 45 effectively prevents the working part from moving. When coiling, after the finished product is cold rolled out, the expansion and contraction drum and the finished coil are hoisted away from the rolling mill together. A new drum can be used to start the machine directly. The finished product can be taken out of the expansion and contraction drum through the loading and unloading platform without occupying the drum. This satisfies both the stability of the solid drum and the convenience and flexibility of expansion and contraction coiling.

[0041] like Figure 1-5 As shown, in some embodiments, the piston rod 31 is connected to the quadrangular pyramid 2 via a long key 32, and the surface of the main shaft 1 is provided with an oblong hole 11 that allows the long key 32 to slide axially.

[0042] The long key 32 connects the piston rod 31 and the four-sided pyramid 2 to transmit torque. The waist-shaped hole 11 structure ensures axial freedom and prevents circumferential slippage, avoiding transmission failure caused by hydraulic fluctuations. The two ends of the long key 32 extend into the interior of two symmetrical inclined bosses 21 and are consistent with the inclination of the inclined bosses 21. When installing the T-key 22 later, the long key 32 can be fixed together with screws. At the same time, the detachable design facilitates later maintenance.

[0043] When the expansion and contraction cylinder 3 drives the piston rod 31 to move axially, the long key 32 slides along the waist-shaped hole 11, converting the linear thrust into the precise axial displacement of the square pyramid 2.

[0044] like Figure 1-5 As shown, in some embodiments, the inclined groove 41 is provided with a T-shaped groove 42 with the same inclination, and the inclined boss 21 forms a sliding pair with the T-shaped groove through the T-shaped key 22.

[0045] The sliding pair with matching slope forms a self-aligning mechanism to compensate for machining and assembly errors and prevent jamming when the sector plate 4 expands radially. When the inclined boss 21 pushes the sector plate 4 through the T-key 22, the inclined coupling effect is decomposed into a radial component force, which drives the sector plate 4 to expand and contract. The slope consistency ensures stable contact surface fit and eliminates impact vibration.

[0046] like Figure 1-5 As shown, in some embodiments, each of the sector plates 4 is provided with an interlocking structure on both sides of its circumference. The interlocking structure includes a boss 43 on the first side and a groove 44 on the second side that is complementary in shape to the boss 43. Adjacent sector plates 4 form a continuous cylindrical surface through the engagement of the boss 43 and the groove 44, and maintain axial linkage during radial expansion.

[0047] The interlocking structure composed of the boss 43 and the groove 44 forms a continuous cylindrical surface in the expansion state. The mechanical coupling of adjacent sector plates 4 eliminates the risk of single plate sway. During radial expansion, the interlocking structure generates a wedge effect, and the boss 43 slides along the inclined surface of the groove 44, further ensuring the stability and consistency during radial expansion.

[0048] like Figure 1-5 As shown, in some embodiments, two cross rings 13 are snapped onto the spindle 1 by a square key 12, and both ends of the sector plate 4 are provided with notches 45. The extension end 131 of the cross ring 13 extends into the notch 45 and forms an axial limiting structure with the end of the sector plate 4.

[0049] The cross ring 13 and the notch 45 cooperate to form a three-dimensional constraint to avoid axial movement. The square key 12 connects to make the cross ring 13 rotate synchronously with the main shaft 1. The cross ring 13 transmits the torque of the main shaft 1 to the end of the sector plate 4. The gap fit between its extension end 131 and the notch 45 not only restricts axial displacement, but also guides the radial expansion of the sector plate 4.

[0050] like Figure 1-5 As shown, in some embodiments, copper sleeves 23 are nested inside both ends of the quadrangular pyramid 2. The copper sleeves 23 are slidably sleeved with the surface of the main shaft 1. End caps 24 for limiting the position of the copper sleeves 23 are also fixed at both ends of the quadrangular pyramid 2.

[0051] The copper sleeve 23 serves as a wear interface and forms a dynamic seal with the spindle 1 through a precision inner hole. The end cover 24 is fixed to the end of the four-sided pyramid 2 with screws. The limiting design of the end cover 24 makes the copper sleeve 23 a standardized wear part, which facilitates the replacement of the copper sleeve 23 in the later stage.

[0052] like Figure 1-5 As shown, in some embodiments, a cross-ring lock nut 5 is also included. The cross-ring lock nut 5 is located on the side of the cross-ring 13 away from the sector plate 4 and is fixedly sleeved with the main shaft 1. The cross-ring lock nut 5 and the main shaft 1 are threaded together. The cylinder body of the expansion and contraction cylinder 3 is fixed to one end of the main shaft 1. A transmission gear 6 is provided at the other end of the main shaft 1. A rotary joint 7 is provided at one end of the expansion and contraction cylinder 3. Two bearing seats 8 are also symmetrically sleeved on the main shaft 1. The two bearing seats 8 are respectively connected to one side of the two cross-ring lock nuts 5. There are four sets of inclined bosses 21. There are four sector plates 4, which are respectively opposite to the positions of the four sets of inclined bosses 21. The number of inclined bosses 21 in each set is not less than three. The number of inclined grooves 41 on one side of the sector plate 4 is the same as the number of one set of inclined bosses 21 and they are opposite to each other.

[0053] The transmission gear 6 is used to connect the mill gearbox and drive the entire drum to rotate. The bearing seat 8 is placed on the machine platform to support the drum. Four sets of inclined bosses 21 are equally spaced on the surface of the four-sided pyramid 2. The four sector plates 4 are respectively opposite to the four sets of inclined bosses 21, and the number of each set of inclined bosses 21 is not less than three, which is adapted to the length of the entire sector plate 4. This design ensures that when the sector plate 4 expands radially, both ends remain consistent and there will be no sway. The rotary joint 7 at one end of the expansion and contraction cylinder 3 will not affect the rotation of the expansion and contraction cylinder 3.

[0054] In summary, radial expansion and contraction are achieved by driving the inclined sliding pair through the expansion and contraction cylinder 3, forming a detachable connection structure with the steel coil. This realizes the overall hoisting function of the steel coil and the drum, completely solving the process problem of online unloading required by traditional fixed drums. The four-sided pyramid 2 and the sector plate 4 linkage mechanism are used in conjunction with axial hydraulic drive. While ensuring the accuracy of radial expansion and contraction, the interlocking sector plate 4 structure ensures that a stable cylindrical surface is formed after expansion. The axial limiting structure composed of the cross ring 13 and the notch 45 effectively prevents the working part from moving around.

[0055] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A retractable drum for a metallurgical cold rolling mill, characterized in that, include: Main spindle (1); The square pyramid (2) has a movable sleeve located outside the main shaft (1), and its surface is provided with multiple sets of inclined bosses (21). The expansion and contraction cylinder (3) has one end of its piston rod (31) inserted into the main shaft (1) and connected to the four-sided pyramid (2) for transmission. Multiple sector plates (4) are annularly covering a quadrangular pyramid (2). The inner side of the sector plate (4) is provided with a slanted groove (41) that cooperates with the slanted boss (21). When the expansion and contraction cylinder (3) drives the four-sided pyramid (2) to move axially, the fan-shaped plate (4) is driven to expand and contract radially synchronously through the cooperation of the inclined boss (21) and the inclined groove (41).

2. The expansion and contraction drum for a metallurgical cold rolling mill according to claim 1, characterized in that: The piston rod (31) is connected to the quadrangular pyramid (2) via a long key (32), and the surface of the main shaft (1) is provided with an oblong hole (11) that allows the long key (32) to slide axially.

3. The expansion and contraction drum for a metallurgical cold rolling mill according to claim 1, characterized in that: The inclined groove (41) is provided with a T-shaped groove (42) with the same inclination, and the inclined boss (21) forms a sliding pair with the T-shaped groove with the same inclination through the T-shaped key (22).

4. The expansion and contraction drum for a metallurgical cold rolling mill according to claim 1, characterized in that: Each of the fan-shaped plates (4) is provided with an interlocking structure on both sides of its circumference. The interlocking structure includes a boss (43) on the first side and a groove (44) on the second side that is complementary in shape to the boss (43). The adjacent fan-shaped plates (4) form a continuous cylindrical surface through the engagement of the boss (43) and the groove (44), and maintain axial linkage when expanding radially.

5. The expansion and contraction drum for a metallurgical cold rolling mill according to claim 1, characterized in that: Two cross rings (13) are fastened to the main shaft (1) by a square key (12). Both ends of the sector plate (4) are provided with notches (45). The extension end (131) of the cross ring (13) extends into the notch (45) and forms an axial limiting structure with the end of the sector plate (4).

6. The expansion and contraction drum for a metallurgical cold rolling mill according to claim 1, characterized in that: Both ends of the quadrangular pyramid (2) are nested with copper sleeves (23), and the inside of the copper sleeves (23) is slidably connected to the surface of the main shaft (1). Both ends of the quadrangular pyramid (2) are also fixed with end caps (24) for limiting the copper sleeves (23).

7. The expansion and contraction drum for a metallurgical cold rolling mill according to claim 1, characterized in that: It also includes a cross ring lock nut (5), which is located on the side of the cross ring (13) away from the sector plate (4) and is fixedly sleeved with the main shaft (1).

8. The expansion and contraction drum for a metallurgical cold rolling mill according to claim 1, characterized in that: The cylinder body of the expansion and contraction cylinder (3) is fixed to one end of the main shaft (1), and the other end of the main shaft (1) is provided with a transmission gear (6). One end of the expansion and contraction cylinder (3) is provided with a rotary joint (7).

9. The expansion and contraction drum for a metallurgical cold rolling mill according to claim 1, characterized in that: Two bearing seats (8) are symmetrically sleeved on the main shaft (1), and the two bearing seats (8) are respectively connected to one side of the two cross ring lock nuts (5).

10. A shrinking coil for a metallurgical cold rolling mill according to claim 1, characterized in that: There are four sets of inclined protrusions (21), and four fan-shaped plates (4), which are respectively opposite to the positions of the four sets of inclined protrusions (21). Each set of inclined protrusions (21) has no less than three. The number of inclined grooves (41) on one side of the fan-shaped plate (4) is the same as the number of a set of inclined protrusions (21) and they are opposite to each other.

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