A pyramid sleeve type coiler drum with hydraulic jaws and a coiling device

Abstract

The present invention discloses a pyramid sleeve coiler drum and a coiling device with hydraulic jaws, belonging to the technical field of coiling devices. The pyramid sleeve coiler drum includes a double-acting hydraulic cylinder, which has an outer shell, a main piston rod and a hollow piston rod. The outer shell is installed at the tail end of the hollow shaft through a flange and a connector. The main piston rod controls the axial movement of the pull rod, and the hollow piston rod controls the axial movement of the hollow pull rod, thereby respectively controlling the expansion and contraction of the drum and the clamping and tensioning of the jaws. While retaining the advantages of common hydraulic jaw reels, the processing difficulty and cost are reduced, the performance is reliable, and even if hydraulic oil leaks, the finished strip steel will not be contaminated. In addition, the hydraulic system is simple and convenient to replace, the equipment failure rate is low, the service life of the reel is increased, and the smooth progress of production is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of winding equipment, and more specifically, relates to a pyramid sleeve type winding machine drum with hydraulic jaws and a winding equipment. Background Art

[0002] The cold rolling coil is a key component of the coiler in a cold rolling production line. For example, the coiler of a pyramid sleeve coiler consists primarily of a hollow main shaft, an extension shaft, a pyramid sleeve, a sector plate, a tie rod, a jaw assembly, and other accessories. Based on the presence and mode of operation of the jaws, coils can be categorized as jawless, hydraulically jawed, or mechanically jawed. These three types of coils operate similarly: an expansion and contraction cylinder drives the axial movement of the pyramid sleeve via a tie rod. This axial movement is converted into radial movement of the sector plate through the interlocking bevels, achieving expansion and contraction of the coil. Hydraulically jawed coils feature separate jaw hydraulic cylinders or radial cylinders on the coil sector plate. Powered by separate hydraulic lines, these cylinders expand and contract, thereby opening and clamping the jaws. Mechanically jawed coils, on the other hand, utilize the tension rods to drive the axial movement of the pyramid sleeve, simultaneously moving the jaw components. The interlocking bevels between the jaw components achieve opening and clamping.

[0003] As products used in cold rolling production lines, in the actual cold rolling production process, the application of hydraulic jaw reels and mechanical jaw reels each has its own advantages and disadvantages. The mechanical jaw structure is less difficult to process and manufacture, the cost is low, and the structure is reliable and not easy to damage. However, the jaw clamping force is small and cannot be adjusted, and the jaw cannot be clamped and opened independently under the condition that the reel is not moving; the hydraulic jaw has a large clamping force and can meet the high tension winding of thick-gauge high-strength steel. The jaw force is adjustable and the clamping and opening of the jaw can be achieved independently. It has been more widely used in recent years, but its processing and manufacturing is difficult, the system cost is high, and once the hydraulic system leaks, the jaw cannot expand or contract. The leaked hydraulic oil will also contaminate the strip surface and the workshop environment, affecting production.

[0004] In order to solve the above problems, after searching, Chinese patent document 1: CN211052159U discloses a pyramid shaft winder reel with mechanical jaws, which includes a pyramid main shaft, three fan-shaped plates, a jaw fan-shaped plate, a spline sleeve, and a bearing assembly. It also includes an axial wedge and a mechanical jaw assembly. The mechanical jaw assembly includes jaw plate I, jaw plate II, jaw plate III, several springs, and several waist-shaped top blocks; the axial wedge is arranged in the axial through hole in the center of the pyramid main shaft; the outer cylindrical surface of the jaw fan-shaped plate is axially penetrated with a groove, the mechanical jaw assembly is arranged in the groove, jaw plate I and jaw plate II are fixed on the jaw fan-shaped plate, jaw plate III is arranged in the middle of jaw plate I and jaw plate II, the spring is arranged in the radial blind hole of the jaw fan-shaped plate, and the waist-shaped top block is arranged in the waist-shaped groove of the axial wedge, the pyramid main shaft and the jaw fan-shaped plate; the waist-shaped top block and the spring do not interfere with each other. Although this patent avoids the problems of high cost and easy leakage of hydraulic jaws, its structure is relatively complex and difficult to operate.

[0005] Another example is Chinese Patent Document 2: CN113814270A, which discloses a reel with complementary double hydraulic jaws, comprising a pyramidal shaft, two jaw sector plates, two sector plates, and two sets of jaw mechanisms. The jaw sector plates, like the other sector plates, are arranged on the inclined plane of the pyramidal shaft and are connected to the pyramidal shaft via a T-key fixed on the pyramidal shaft. When the reel is reduced, the jaw sector plates can move radially relative to the main shaft in the same manner as the other sector plates. A groove is provided on the top of the arc surface of the jaw sector plate, and the jaw mechanism is embedded in the groove. A reset spring is embedded in the center of the groove, and hydraulic cylinders are symmetrically arranged on both sides of the longitudinal direction of the reset spring. In combination with the structure of this patent, it uses two hydraulic cylinders, and the piston rods of the hydraulic cylinders push against the bottom surface of the movable jaw strip. The structure is relatively complex and also difficult to operate. Summary of the Invention

[0006] 1. Problem to be solved

[0007] In response to the problem in the prior art that leakage of the hydraulic system may cause the jaws to be unable to expand or contract, the present invention provides a pyramid sleeve winder drum with hydraulic jaws, which helps to eliminate equipment failures caused by leakage of the hydraulic pipeline and ensures the normal use of the pyramid sleeve winder drum.

[0008] Another object of the present invention is to provide a winding device for a pyramid sleeve winder drum having the above-mentioned hydraulic jaws.

[0009] 2. Technical solution

[0010] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0011] The pyramid sleeve type winder drum with hydraulic jaws of the present invention comprises: a hollow shaft with a hollow step; a pyramid sleeve disposed on the outer circumferential surface of the front half of the hollow shaft; a sector plate disposed on the outer side of the pyramid sleeve, wherein the inclined surface and hook at the bottom of the sector plate cooperate with the inclined surface of the pyramid sleeve to convert the axial movement of the pyramid sleeve into its radial movement;

[0012] A cylindrical hollow pull rod and a pull rod are arranged in the inner hole of the hollow shaft; the hollow pull rod and the pull rod are axially concentric structures, and the center of gravity is located on the axis;

[0013] The lower wedge of the jaw, which is set in the axial dovetail groove on the outer circumference of the front half of the hollow shaft, is connected to the hollow pull rod through the empty groove on the pyramid sleeve and moves axially with the hollow pull rod; the upper wedge of the jaw, which is set in the axial groove on the surface of one of the sector plates and cooperates with the lower wedge of the jaw through the inclined surface, can convert the axial movement of the lower wedge of the jaw into its own radial movement;

[0014] And a double-acting hydraulic cylinder, which has an outer shell, a main piston rod and a hollow piston rod. The outer shell is installed at the tail end of the hollow shaft through a flange and a connector. The main piston rod controls the axial movement of the pull rod, and the hollow piston rod controls the axial movement of the hollow pull rod, thereby respectively controlling the expansion and contraction of the reel and the clamping and opening actions of the jaws.

[0015] The double-acting hydraulic cylinder of the present invention comprises a main piston rod and a hollow piston rod sleeved on the main piston rod. Each piston rod has a separate rod chamber and rodless chamber, and the two piston rods can move independently without being affected by each other. Supplying oil to the rod chamber of the main piston rod retracts the main piston rod, while supplying oil to the rodless chamber of the main piston rod extends the main piston rod. Supplying oil to the rod chamber of the hollow piston rod retracts the hollow piston rod, while supplying oil to the rodless chamber of the hollow piston rod extends the hollow piston rod. The main piston rod is connected to a tie rod to control the axial movement of the tie rod; the hollow piston rod is connected to a hollow tie rod to control the axial movement of the hollow tie rod.

[0016] In a possible implementation manner of the present invention, the main piston rod is connected to the pull rod via a thread; and the hollow piston rod is connected to the hollow pull rod via a cam ring and a fastening ring.

[0017] In one possible implementation manner of the present invention, a groove for storing lubricating grease is formed on the cylindrical outer surface of the cam ring.

[0018] In a possible implementation manner of the present invention, the cam ring is clamped between two fastening rings.

[0019] In a possible implementation manner of the present invention, the cam ring and the fastening ring are both fixed by circumferential positioning.

[0020] In one possible embodiment of the present invention, an extension shaft is provided on the outer circumferential surface of the front half of the pull rod;

[0021] The extension shaft and the pyramid sleeve are fixed on the pull rod by bolts, and the extension shaft and the pyramid sleeve can move axially along with the pull rod.

[0022] In a possible implementation manner of the present invention, the upper bevel wedge of the jaw and the lower bevel wedge of the jaw are mutually matched inclined surface structures, and the angle of the inclined surface is 15°-20°.

[0023] In a possible implementation manner of the present invention, the lower wedge of the jaw is connected to the hollow pull rod via a pin hinge.

[0024] In a possible implementation manner of the present invention, the pin is made of copper alloy, and a layer of Ag-graphene composite coating is plated on the surface of the pin.

[0025] The present invention also provides a winding device, comprising the above-mentioned pyramid sleeve winder drum with hydraulic jaws.

[0026] 3. Beneficial effects

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The pyramid sleeve coiler drum with hydraulic jaws of the present invention reduces the processing difficulty and cost while retaining the advantages of common hydraulic jaw coilers. It has reliable performance and will not contaminate the finished steel strip even if hydraulic oil leaks. The hydraulic system is easy and convenient to replace, and the equipment failure rate is low, thereby increasing the service life of the coiler and ensuring smooth production.

[0029] (2) The pyramid sleeve reel with hydraulic jaws of the present invention has a hollow piston rod connected to the hollow pull rod through a cam ring and a fastening ring, thereby improving the safety and reliability of use.

[0030] (3) The pyramid sleeve winder drum with hydraulic jaws of the present invention has a groove for storing lubricating grease formed on the cylindrical outer surface of the cam ring. Lubricating grease is injected into the groove, which can effectively reduce friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless otherwise specified, these drawings are intended only to conceptually illustrate the structures described herein and are not necessarily drawn to scale.

[0032] Figure 1It is a structural schematic diagram of the pyramid sleeve winder drum with hydraulic jaws of the present invention;

[0033] Figure 2 A cross-sectional view of a pyramid sleeve winder drum with hydraulic jaws according to the present invention;

[0034] Figure 3 It is a structural schematic diagram of the double-acting hydraulic cylinder of the present invention;

[0035] Figure 4 Schematic diagram of the connection between the double-acting hydraulic cylinder, the tie rod and the hollow tie rod of the present invention;

[0036] Figure 5 A schematic cross-sectional view of the pin hinge connection between the lower wedge of the jaw and the hollow pull rod of the present invention;

[0037] Figure 6 Measurement results of the Ag-graphene composite coating on the pin between the lower wedge of the jaw and the hollow pull rod of the present invention.

[0038] Description of reference numerals:

[0039] 1. Hollow shaft; 2. Hollow pull rod; 3. Pull rod; 4. Pyramid sleeve; 5. Extension shaft; 6. Upper wedge of jaws; 7. Lower wedge of jaws; 8. Sector plate; 9. Double-acting hydraulic cylinder; 91. Housing; 92. Main piston rod; 93. Hollow piston rod; 94. Cam ring; 95. Groove; 96. Fastening ring; 10. Pin. DETAILED DESCRIPTION

[0040] The following detailed description of exemplary embodiments of the present invention refers to the accompanying drawings, which form a part of the description, and in which exemplary embodiments of the present invention that can be implemented are shown as examples. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to implement the present invention, it should be understood that other embodiments can be implemented and various changes can be made to the present invention without departing from the spirit and scope of the present invention. The following more detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but is merely for illustration and does not limit the description of the features and characteristics of the present invention, so as to propose the best way to perform the present invention and be sufficient to enable those skilled in the art to implement the present invention. Therefore, the scope of the present invention is limited only by the appended claims.

[0041] The following detailed description of the present invention and example embodiments may be better understood with reference to the accompanying drawings, in which elements and features of the present invention are identified by reference numerals.

[0042] like Figures 1 to 5As shown, the pyramid sleeve reel with hydraulic jaws in this embodiment includes a hollow shaft 1, a hollow pull rod 2, a pull rod 3, a pyramid sleeve 4, an extension shaft 5, an upper inclined wedge 6 of the jaws, a lower inclined wedge 7 of the jaws, a fan-shaped plate 8 and a double-acting hydraulic cylinder 9.

[0043] The following description is made in conjunction with our company's improved products, in which the number of sector plates 8 is 4, and the double-acting hydraulic cylinder 9 has an outer shell 91, a main piston rod 92 and a hollow piston rod 93. The outer shell 91 is installed at the tail end of the hollow shaft 1 through a flange (not marked in the figure) and a connector (not marked in the figure). The main piston rod 92 controls the axial movement of the pull rod 3, and the hollow piston rod 93 controls the axial movement of the hollow pull rod 2, thereby controlling the expansion and contraction of the reel and the clamping and tensioning of the jaws respectively. The above-mentioned flanges and connectors are all commercially available products.

[0044] Combine Figure 3 As shown, the double-acting hydraulic cylinder 9 of this embodiment has a main piston rod 92 and a hollow piston rod 93 sleeved on the main piston rod 92. Each piston rod has a separate rod cavity and rodless cavity. The two piston rods can move independently and are not affected by each other. Supplying oil to the rod cavity of the main piston rod 92 causes the main piston rod 92 to retract, and supplying oil to the rodless cavity of the main piston rod 92 causes the main piston rod 92 to extend. Supplying oil to the rod cavity of the hollow piston rod causes the hollow piston rod to retract, and supplying oil to the rodless cavity of the hollow piston rod causes the hollow piston rod to extend. The main piston rod 92 is connected to the tie rod 3 to control the axial movement of the tie rod 3; the hollow piston rod is connected to the hollow tie rod 2 to control the axial movement of the hollow tie rod 2. The use of the above-mentioned double-acting hydraulic cylinder 9 has a simple structure and is easy to operate.

[0045] In order to realize the connection between the main piston rod 92 and the hollow piston rod 93 and the pull rod 3 and the hollow pull rod 2 respectively, the method that can be adopted is: there is an internal threaded screw hole at the end of the main piston rod 92 of the double-acting hydraulic cylinder 9, and the end of the pull rod 3 is an external threaded screw, and the main piston rod 92 of the double-acting hydraulic cylinder 9 is connected to the pull rod 3 through the internal and external threaded connection; the ends of the hollow piston rod and the hollow pull rod 2 are both externally threaded, and need to be connected through another separate connecting nut, and anti-loosening nuts are also provided on both sides of the connecting nut to prevent the connecting nut from loosening.

[0046] However, it was found during use that the above structure has certain safety hazards. The reason for this is that the hollow piston rod 93 is rigidly connected to the hollow pull rod 2, which is not conducive to slight deformation during the winding process. Therefore, in order to improve the safety and reliability of use, the above hollow piston rod is connected to the above hollow pull rod through a cam ring 94 and a fastening ring 96. Figure 4 As shown in FIG, the cam ring 94 can be sandwiched between two fastening rings 96, and then the cam ring 94 and the fastening rings 96 are both fixed by circumferential positioning.

[0047] The above-mentioned cam ring 94 not only plays a connecting role, but the surface of the cam ring 94 rubs against the inner side of the pyramid sleeve 4 and rests on the outer side of the pyramid sleeve 4, which can limit the positioning of the hollow piston rod 93. Furthermore, a groove 95 for storing lubricating grease is formed on the cylindrical outer surface of the above-mentioned cam ring 94. Injecting lubricating grease into the groove 95 can effectively reduce friction.

[0048] In this embodiment, the cam ring 94 is made of the same material as the pyramid sleeve 4, thereby reducing contact wear between the two.

[0049] In this embodiment, the hollow shaft 1 is a hollow stepped shaft. A cylindrical, elongated hollow tie rod 2 is mounted within the inner bore of the hollow shaft 1, and a tie rod 3 is mounted within the inner bore of the hollow tie rod 2. A pyramidal sleeve 4 is mounted on the outer circumference of the front half of the hollow shaft 1. The outer circumference of the pyramidal sleeve 4 comprises a hollow cylindrical structure with a set of inclined surfaces. An extension shaft 5 is mounted on the outer circumference of the front half of the tie rod 3. The extension shaft 5 and the pyramidal sleeve 4 are bolted together and secured to the tie rod 3 with nuts. The extension shaft 5 and the pyramidal sleeve 4 can move axially with the tie rod 3. A sector plate 8 is mounted on the outside of the pyramidal sleeve 4. The inclined surface and hook at the bottom of the sector plate 8 cooperate with the inclined surface of the pyramidal sleeve 4 to convert the axial movement of the pyramidal sleeve 4 into radial movement.

[0050] Furthermore, the upper bevel 6 and the lower bevel 7 of the jaw are inclined plane structures that cooperate with each other, and the angle of the inclined plane is 15°-20°, preferably 15°, wherein the lower bevel 7 of the jaw is installed in the axial dovetail groove on the outer cylindrical surface of the front half of the hollow shaft 1, and is connected to the hollow pull rod 2 through the empty groove on the pyramid sleeve 4, and can move axially with the hollow pull rod 2, and the upper bevel 6 of the jaw is installed in the axial groove on the surface of one of the fan-shaped plates 8 and cooperates with the lower bevel 7 of the jaw through the inclined plane, which can convert the axial movement of the lower bevel 7 of the jaw into its own radial movement.

[0051] Furthermore, the hollow pull rod 2 and the pull rod 3 are a concentric structure of an axial sleeve and a shaft, and the center of gravity is located on the axis.

[0052] Compared to the structure in Patent Document 2, which uses two hydraulic cylinders, whose piston rods push against the bottom surface of the movable jaw bar, the structure is more complex and difficult to install and use in factories with limited space. The reel in this embodiment uses a two-set pull rod structure consisting of a hollow pull rod and a pull rod. The pull rod drives the extension shaft and the pyramid sleeve for axial movement, while the hollow pull rod drives the upper and lower jaw wedges for axial movement. This achieves dual movement of the hollow pull rod and the pull rod, simultaneously enabling relative movement between the pyramid sleeve and the upper and lower jaw wedges. The total floor space saved is over 20% compared to the floor space in Patent Document 2.

[0053] like Figure 5As shown, the lower wedge 7 of the jaws is hinged to the hollow pull rod 2 through a pin 10. After a lot of use, the inventor was surprised to find that the pin 10 made of copper alloy, such as high manganese copper alloy, has a long service life and can rotate relative to each other, thus avoiding the phenomenon that the lower wedge 7 of the jaws is stuck due to the radial force generated by the deflection torque.

[0054] Furthermore, the pin 10 rotates continuously during use, and there is great wear and tear when in contact with the lower wedge 7 of the jaws and the hollow pull rod 2. Therefore, the pin 10 not only needs to have good wear resistance and thermal conductivity, but also, through a large number of tests, a layer of Ag-graphene composite coating (Ag-Graphene, abbreviated as Ag-Gr) is plated on the surface of the pin 10, and the electroplating method of the existing technology (such as the carburizing and quenching parts electroplating process used by our company) is adopted, which can effectively improve the service life of the pin 10 and has good thermal conductivity and lubrication effects.

[0055] The pin 10 coated with the Ag-graphene composite coating was compared with the alloy steel pin 10 currently used in the market (such as high manganese alloy steel). The company's coiling machines with conventional outer diameters of φ468, φ508, φ610, and φ762 were used. The inspection was carried out according to the standard's 6-month inspection period and a friction and wear testing machine was used. The specific data are shown in the following table:

[0056]

[0057] According to the data in the table, the use of the improved pin 10 has been improved, wherein the average wear volume / mm after 6 months of use has been reduced by at least 30%.

[0058] Cross-sectional observations using FE-SEM (Field Emission Scanning Electron Microscope) and TEM (Transmission Electron Microscope) show that an Ag-graphene composite coating is formed on the pin 10 , and the surface is smooth.

[0059] like Figure 6 As shown in the following measurements, when the thickness of the Ag-graphene composite coating is 1 μm, the preferred orientation is <111> direction, while when the thickness of Ag-graphene composite coating (Ag-Gr) is 3μm, the preferred orientation is toward <220> Therefore, from the perspective of crystal structure stability, the film thickness ranges from 3 μm to 5 μm, which can extend the service life of the pin 10.

[0060] The above-mentioned pyramid sleeve reel with hydraulic jaws is applied to the winding equipment. While retaining the advantages of the common hydraulic jaw reel, the processing difficulty and cost are reduced, the performance is reliable, and even if the hydraulic oil leaks, the finished strip steel will not be contaminated. The hydraulic system is simple and convenient to replace, the equipment failure rate is low, the service life of the reel is increased, and the smooth progress of production is ensured.

Claims

1. A pyramid sleeve winder drum with hydraulic jaws, comprising: A hollow shaft (1) with a hollow step; a pyramid sleeve (4) arranged on the outer circumferential surface of the front half of the hollow shaft (1); a sector plate (8) arranged on the outside of the pyramid sleeve (4), which converts the axial movement of the pyramid sleeve (4) into its own radial movement through the inclined surface and hook at the bottom of the sector plate (8) cooperating with the inclined surface of the pyramid sleeve (4); characterized in that: A cylindrical hollow pull rod (2) is arranged in the inner hole of the hollow shaft (1) and a pull rod (3) is arranged in the inner hole of the hollow pull rod (2); the hollow pull rod (2) and the pull rod (3) are axially concentric structures, and the center of gravity is located on the axis; The lower inclined wedge (7) of the jaws is arranged in the axial dovetail groove on the outer circumference of the front half of the hollow shaft (1), is connected to the hollow pull rod (2) through the empty groove on the pyramid sleeve (4), and moves axially with the hollow pull rod (2); the upper inclined wedge (6) of the jaws is arranged in the axial groove on the surface of one of the fan-shaped plates (8) and cooperates with the lower inclined wedge (7) of the jaws through the inclined surface, and can convert the axial movement of the lower inclined wedge (7) of the jaws into its own radial movement; And a double-acting hydraulic cylinder (9), the double-acting hydraulic cylinder (9) has an outer shell (91), a main piston rod (92) and a hollow piston rod (93), the outer shell (91) is installed at the tail end of the hollow shaft (1) through a flange and a connector, the main piston rod (92) controls the axial movement of the pull rod (3), and the hollow piston rod (93) controls the axial movement of the hollow pull rod (2), thereby respectively controlling the expansion and contraction of the reel and the clamping and opening of the jaws.

2. The pyramid sleeve winder drum with hydraulic jaws according to claim 1, characterized in that: The main piston rod (92) is connected to the pull rod (3) via a thread; the hollow piston rod (93) is connected to the hollow pull rod (2) via a cam ring (94) and a fastening ring (96).

3. The pyramid sleeve winder drum with hydraulic jaws according to claim 2, characterized in that: A groove (95) for storing lubricating grease is formed on the cylindrical outer surface of the cam ring (94).

4. The pyramid sleeve winder drum with hydraulic jaws according to claim 3, characterized in that: The cam ring (94) is sandwiched between two fastening rings (96).

5. The pyramid sleeve winder drum with hydraulic jaws according to claim 4, characterized in that: The cam ring (94) and the fastening ring (96) are both fixed by circumferential positioning.

6. The pyramid sleeve winder drum with hydraulic jaws according to any one of claims 1 to 5, characterized in that: An extension shaft (5) is provided on the outer circumferential surface of the front half of the pull rod (3); The extension shaft (5) and the pyramid sleeve (4) are fixed to the pull rod by means of bolts, and the extension shaft (5) and the pyramid sleeve (4) can move axially along with the pull rod.

7. The pyramid sleeve winder drum with hydraulic jaws according to claim 6, characterized in that: The upper oblique wedge (6) of the jaws and the lower oblique wedge (7) of the jaws are mutually matched oblique surface structures, and the angle of the oblique surface is 15°-20°.

8. The pyramid sleeve winder drum with hydraulic jaws according to any one of claims 1 to 5, characterized in that: The lower oblique wedge (7) of the jaws is hingedly connected to the hollow pull rod (2) via a pin (10).

9. The pyramid sleeve winder drum with hydraulic jaws according to claim 8, characterized in that: The pin shaft (10) is made of copper alloy, and a layer of Ag-graphene composite coating is plated on the surface of the pin shaft (10).

10. A coiling device, characterized in that: The invention relates to a pyramid sleeve winder drum with hydraulic jaws comprising the drum according to any one of claims 1 to 9.

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