Closed wedge-type reel jaw device, reel and coiling apparatus

Abstract

A closed wedge-type reel jaw device (6), a reel and a coiling apparatus, belonging to the technical field of coilers. The jaw device (6) comprises: a base (61), assembled inside a slot arranged in a spindle (1), and matched with a radial wedge (5), a pull rod (2) pulling the radial wedge (5) to move radially so as to jack up the base (61); a movable jaw plate (62), arranged corresponding to sector-shaped plates (3), so as to constitute a jaw; and a torsion bar (63), arranged on the base (61), the torsion bar (63) being connected to the movable jaw plate (62) by means of a key (66). The torsion bar (63) comprises a bar body (631) and spline shaft-shaped or polygonal spindle portions (632) connected to two ends of the bar body (631). A shaft sleeve (64) is fittingly provided on the spindle portions (632); by means of the shaft sleeve (64), the torsion bar (63) is separately connected to the base (61) and the movable jaw plate (62); the shaft sleeve (64) comprises a first sleeve body (641) and a second sleeve body (642); and the first sleeve body (641) and the second sleeve body (642) are assembled by means of damping blocks (67) to constitute an integral shaft sleeve (64), and are engaged at two ends of the bar body (631).

Description

An inclined wedge closed reel jaw device, reel and reeling equipment Technical Field

[0001] The present invention belongs to the technical field of coiling machines, and more particularly relates to an inclined wedge closed reel jaw device, a reel and a coiling device. Background Art

[0002] The cold rolling coil is a key component of the coiler in a cold rolling production line. For example, a closed coil with a beveled wedge design, for example, maintains a closed sector during coil expansion and contraction. This can lead to internal scratches and other issues when coiling steel strip due to gaps between the sectors. Consequently, with increasingly stringent requirements for cold-rolled strip, closed coils with beveled wedges are increasingly becoming the preferred cold rolling coil design. A beveled wedge cold rolling coil primarily consists of a main shaft, extension shaft, beveled wedge, sector plates, tie rods, a crosshead, a jaw assembly, and other accessories. The expansion and contraction cylinder drives the crosshead and beveled wedge axially via the tie rods. This axial movement is converted into radial movement of the sector plates through the interplay of beveled surfaces, achieving expansion and contraction of the coil. The clamping principle of a mechanically clamped beveled wedge design is that the cylinder, through the tie rods, drives the axial movement of the beveled wedge, simultaneously moving the jaw components. The interplay of beveled surfaces between the jaw components allows for the jaws to open and close.

[0003] As a product used in cold rolling production lines, the inclined wedge mechanical jaw reel is widely used in the actual cold rolling production process. The mechanical jaw structure is easy to process and manufacture, with low cost, reliable structure and not easy to damage. However, it is impossible to clamp and open the jaws independently without the reel moving. In addition, the jaw device wears out after a period of use, resulting in a larger jaw opening. During use, the thin strip cannot be clamped, which will cause the unit to be unable to establish tension for effective winding.

[0004] Especially for steel strips with a coiling thickness of more than 3mm, a jaw device is generally set on the reel to coil the strip head, forming a large tension. Some new materials and cold-state strips of special thickness are also widely used, such as 7-8mm thick high-strength steel strips, 8-12mm thick stainless steel strips, etc. For the coiling of these thick strips, a reel with a jaw device that can adapt to high tension, high speed, and high rigidity must be used. Xu Jun summarized the structure of the jaw device in the article "Design and Selection of the Jaw Structure of the Coiler for Cold Thick Strip" (Modern Metallurgy, Vol. 46, No. 1, February 2018). It is generally divided into two types: fixed jaws and movable jaws, and movable jaws are commonly used:

[0005] 1) The fixed jaw device has a simple structure, and only the jaw groove is processed on the fan-shaped plate.

[0006] 2) The classification of movable jaw devices is as follows:

[0007] A. Axial hydraulic jaw structure: The jaw piston pushes the swing jaw plate to press the strip head toward the fixed jaw plate. Under the action of the jaw pressure plate and the ball, the swing jaw plate swings and presses the strip head tightly, forming initial tension. When unloading, the hydraulic jaw returns oil, and the swing jaw plate is reset by the spring at the jaw pressure plate.

[0008] B. Radial hydraulic jaw structure: The quadrangular pyramid type reel has good strength and rigidity, which can meet the requirements of the reversible cold rolling mill coiler. The radial hydraulic jaw can provide a large clamping force, easily clamping the strip head, ensuring smooth coiling and good coil shape. It is especially suitable for stainless steel, silicon steel and other applications where high tension coiling is required.

[0009] C. Swinging mechanical jaw structure: During the expansion of the reel, the top plate pushes the swinging jaw plate and the jaw pressure plate to rotate in the opposite direction around the jaw rotation axis to compress the tape head; when the reel contracts, the swinging jaw plate and the jaw pressure plate are reset under the action of the jaw spring to release the tape head; the jaws can achieve jaw clamping and winding of thinner or thicker strips by replacing the jaw strips; the jaws can wind thick strips of 12 mm and above, such as the inclined wedge swing arm hydraulic mechanical jaws disclosed in Chinese patent CN201310009727.1 and the jaw device of the reel of the winder disclosed in Chinese patent CN201210509875.5.

[0010] D. Oblique wedge jaw structure: The oblique wedge block of the jaw pushes the closed oblique wedge to press the strip head toward the jaw strip and tighten it; the expansion and contraction of the drum sector plate is achieved by the rotating oil cylinder pushing the oblique wedge block, and the clamping of the jaws is achieved by the jaw hydraulic cylinder pushing the jaw oblique wedge block, such as the jaw clamping device for the coiler drum disclosed in Chinese patent CN201210588055.X, the jaw cold-rolled coil disclosed in CN202210171500.6, the jaw coiling device disclosed in CN201910669952.5, and the pyramidal shaft coiler drum with mechanical jaws disclosed in CN201910976408.5.

[0011] E. Torsion bar spring jaw structure: During the expansion and contraction of the reel, the jaws loosen and clamp the tape head under the movement of the jaw wedge; after the jaws clamp the tape head, the pre-tightening force of the torsion bar spring assists the jaws to swing in the opposite direction to clamp the tape head; when the reel contracts, the jaws reset under the action of the spring, such as the mechanical jaw reel disclosed in Chinese patent CN202210373928.9.

[0012] Regarding the above-mentioned disclosed patents, the mechanical jaw reel disclosed in Chinese patent CN202210373928.9 uses a torsion bar and a positioning sleeve to adjust the jaw plate, effectively solving the problem of jaw clamping caused by wear. However, after on-site use, the jaw plate needs to be replaced and the torsion bar needs to be inspected. Due to the harsh on-site environment and the time limit for the use and maintenance of the reel, the positioning sleeve is not easy to remove, and violence is used during the disassembly process, further causing damage to the main components of the reel.

[0013] Summary of the Invention

[0014] 1. Problem to be solved

[0015] In view of the problem that the shaft sleeve is difficult to disassemble in the prior art, the present invention provides an inclined wedge closed reel jaw device, which facilitates the disassembly of the shaft sleeve, effectively improves the installation efficiency and reduces labor intensity.

[0016] The present invention also provides a reel having the above-mentioned inclined wedge closed reel jaw device.

[0017] The present invention also provides a winding device having the winding drum.

[0018] 2. Technical solution

[0019] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0020] The inclined wedge closed reel jaw device of the present invention comprises: a base, which is assembled in a groove provided on the main shaft and cooperates with a radial inclined wedge, and the radial inclined wedge is pulled by a pull rod to generate radial movement to lift the base;

[0021] A movable jaw plate, which is arranged corresponding to the fan-shaped plate to form a jaw;

[0022] a torsion bar provided on the base, the torsion bar being connected to the movable jaw plate via a key;

[0023] The torsion rod comprises a rod body and a spline shaft-shaped or polygonal spindle portion connected to both ends of the rod body, wherein the spindle portion is provided with a shaft sleeve, and the torsion rod is connected to the base and the movable jaw plate respectively through the shaft sleeve;

[0024] and a return spring provided on the sector plate;

[0025] The shaft sleeve comprises a first sleeve body and a second sleeve body, wherein the first sleeve body and the second sleeve body are spliced ​​together through a damping block to form an integral shaft sleeve, and are clamped on both ends of the rod body.

[0026] In one possible embodiment of the present invention, the first sleeve and the second sleeve are both semicircular sleeves, the first sleeve includes a first end and a second end, wherein the first end is provided with a first screw hole, and the second end is provided with a second screw hole; the second sleeve includes a first mating end and a second mating end, the first mating end is provided with a first positioning hole, and the second mating end is provided with a second positioning hole, and the first sleeve and the second sleeve are fixed by fastening bolts.

[0027] In a possible embodiment of the present invention, grooves are provided on the end faces of the first end, the second end, the first mating end, and the second mating end, and a damping block is installed in the groove. The length of the damping block is less than the height of the first sleeve / the second sleeve, and a through hole is provided in the center of the damping block.

[0028] In order to improve the wear resistance of the inner surfaces of the first and second sleeves, the inner surfaces of the first and second sleeves are plated with a layer of Ag-graphene composite coating, and the thickness of the Ag-graphene composite coating is 3μm-5μm.

[0029] The torsion bar is fixed at one end and load-bearing at the other, using its torsional deformation to act as a spring. The movable jaws swing in the opposite direction upon contact with the strip. Because the torsion bar has a certain preload, it can clamp the strip when the preload is appropriate. The clamping force can be varied with the thickness of the strip, preventing the roll from being out of round due to a wide range of strip thicknesses.

[0030] To facilitate assembly between the torsion bar and the base, in one possible embodiment of the present invention, the spindle portion has a hexagonal cross-section and is fitted with a hexagonal sleeve. The base has a circular hole into which the hexagonal sleeve is seated. The torsion bar ends are formed into polygonal or involute spline shapes, with a regular hexagon typically chosen for cost considerations.

[0031] In one possible embodiment of the present invention, the cross-sectional shape of the rod body includes, but is not limited to, a solid circle, a hollow circle, a rectangle, and a polygon. Because torsion bars are subject to high stress during operation and diameter errors significantly affect their stiffness, they are typically made of materials that have been ground or turned to remove surface defects.

[0032] In order to increase the biting force of the movable jaw plate, in a possible embodiment of the present invention, a jaw strip is provided on the base, and teeth are provided on the jaw strip, and the teeth can increase the friction between the jaw strip and the steel strip.

[0033] The present invention also provides a closed winding drum with inclined wedges, comprising a main shaft, a pull rod, a fan-shaped plate, an axial inclined wedge, a radial inclined wedge and a jaw device. The pull rod drives the axial inclined wedge to the left to move in the main shaft groove, and the axial inclined wedge drives the radial inclined wedge to move upward through the inclined surface. A jaw device is provided on the radial inclined wedge, and the jaw device is the above-mentioned jaw device.

[0034] In a possible implementation manner of the present invention, an extension shaft is provided on the outer circumferential surface of the front half of the pull rod; the extension shaft is fixed to the main shaft by bolts, and the extension shaft can move axially with the pull rod.

[0035] In a possible implementation manner of the present invention, the axially inclined wedge and the radially inclined wedge are mutually matched inclined surface structures, and the angle of the inclined surface is 15°-20°.

[0036] The present invention also provides a winding device, comprising the above-mentioned inclined wedge closed winding drum.

[0037] 3. Beneficial effects

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] (1) The inclined wedge closed reel jaw device of the present invention can be used to remove the original sleeve when the sleeve is worn or damaged. The first sleeve and the second sleeve of the present invention are clamped on the two ends of the rod body and then fastened. Compared with the previous replacement, the time saved is at least 1 hour, which effectively improves the installation efficiency and reduces the labor intensity.

[0040] (2) In order to improve the surface hardness of the joint and reduce the wear of the joint, the inclined wedge closed reel jaw device of the present invention is laser-heat-treated at the joint between the first and second sleeves to obtain a finer hardened layer structure with minimal deformation.

[0041] (3) In the inclined wedge closed reel jaw device of the present invention, the damping block is an important component of the shaft sleeve, and its service life directly affects the service life of the shaft sleeve. The damping block is heat-treated to achieve the same hardness as the first shaft sleeve or the second shaft sleeve, and the preferred hardness is about 50HRC. During the dynamic process, the damping block has little wear and tear and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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.

[0043] FIG1 is a cross-sectional view of the inclined wedge closed reel jaw device of the present invention when it is released;

[0044] FIG2 is a cross-sectional view along line AA of FIG1 ;

[0045] FIG3 is a cross-sectional view of the clamping of the inclined wedge closed reel jaw device of the present invention;

[0046] FIG4 is a cross-sectional view along line BB of FIG3 ;

[0047] FIG5 is a schematic diagram of a partial structure of the inclined wedge closed reel jaw device of the present invention;

[0048] FIG6 is a partial enlarged view of FIG4;

[0049] Figure 7 is a cross-sectional view of the sleeve structure of the inclined wedge closed reel jaw device;

[0050] FIG8 is a side view of the inclined wedge closed reel jaw device of the present invention;

[0051] FIG9 is a schematic diagram of the torsion bar structure of the inclined wedge closed reel jaw device of the present invention.

[0052] Description of reference numerals:

[0053] 1. Spindle; 11. Jaw bar; 2. Pull rod; 3. Sector plate; 4. Axial wedge; 5. Radial wedge;

[0054] 6. Jaw assembly; 61. Base; 62. Movable jaw plate; 63. Torsion bar; 631. Rod body; 632. Spindle; 64. Bushing; 641. First sleeve; 641-a. First end portion; 641-b. First screw hole; 641-c. Second end portion; 641-d. Second screw hole; 642. Second sleeve; 642-a. First mating end portion; 642-b. First positioning hole; 642-c. Second mating end portion; 642-d. Second positioning hole; 65. Fastening bolt; 66. Key; 67. Damping block;

[0055] 7. Return spring; 8. Extension shaft. DETAILED DESCRIPTION

[0056] 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.

[0057] 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.

[0058] Example 1

[0059] As shown in Figures 1 to 4 and Figure 6, the inclined wedge closed reel jaw device 6 of this embodiment includes: a base 61, which is assembled in a groove provided on the main shaft 1, cooperates with the radial inclined wedge 5, and pulls the radial inclined wedge 5 by the pull rod 2 to produce radial movement to lift the base 61; a movable jaw plate 62, which is arranged corresponding to the fan-shaped plate 3 to form a jaw; a torsion bar 63 provided on the above-mentioned base 61, and the above-mentioned torsion bar 63 is connected to the above-mentioned movable jaw plate 62 through a key 66.

[0060] In Figure 9, the torsion bar 63 includes a bar body 631 and spindle portions 632 with a splined shaft or polygonal cross-section connected to both ends of the bar body 631. The spindle portions 632 are fitted with bushings 64, connecting the torsion bar 63 to the base 61 and the movable jaw plate 62, respectively. A return spring 7 is provided on the fan-shaped plate 3, which retracts the base 61 and the movable jaw plate 62. The spindle portions 632, with their splined shaft or polygonal cross-sections, effectively increase the contact area, thereby increasing torque.

[0061] As shown in Figures 7 and 8, the sleeve 64 of the present invention is hollow, with the cross-section of the hollow portion being a spline shaft or polygon (generally a regular polygon, such as an equilateral triangle, a regular quadrilateral, a regular pentagon, a regular hexagon, a regular octagon, etc.), and its outer contour being circular. As is well known, the sleeve 64 currently used is a monolithic type, which is inconvenient to install and remove, resulting in low work efficiency. In addition, the sleeve 64 of this embodiment is the most important part of the jaw assembly 6, and its processing precision is extremely high, with the flatness of the plane being within 0.005mm (max) to effectively ensure that the preload force of the torsion bar 63 reaches the theoretical design value.

[0062] Therefore, the inventors make the shaft sleeve 64 include a first sleeve body 641 and a second sleeve body 642 . The first sleeve body 641 and the second sleeve body 642 are spliced ​​together to form an integral shaft sleeve 64 , and are clamped on both ends of the rod body 631 .

[0063] However, after extensive testing and analysis, the inventors developed a split design for the sleeve 64. While this facilitated installation, the sleeve 64's assembly precision never met the design requirements. Furthermore, the sleeve 64 was susceptible to damage during use. Analysis revealed that the possible cause was radial and circumferential misalignment and an excessive gap at the joint between the first and second sleeve bodies 641, 642 during assembly. These factors reduced the surface flatness of the sleeve 64, resulting in reduced performance and, in severe cases, an excessively large gap between the sleeve 64 and the torsion bar 63.

[0064] As shown in Figure 8, the damping block 67 is used to position and install the first sleeve 641 and the second sleeve 642 at the joint. The shape of the damping block 67 is square or rectangular. The surface roughness of the damping block 67 is not higher than Ra0.8, and the surface roughness of the groove surface that cooperates with the damping block 67 is not higher than Ra0.8; the length of the damping block 67 is less than the height of the first sleeve 641 / the second sleeve 642. A through hole is provided in the center of the damping block 67. The fastening bolt 65 passes through the through hole to fix the damping block 67. At the same time, the damping block 67 positions the first sleeve 641 and the second sleeve 642 in the radial direction.

[0065] The damping block 67 is an important component of the sleeve 64, and its service life directly affects the service life of the sleeve 64. The damping block 67 is heat-treated to achieve the same hardness as the first sleeve 64 or the second sleeve 64. The preferred hardness is about 50HRC. During the dynamic process, the damping block 67 has little wear and tear and a long service life.

[0066] When the sleeve 64 is in use, the damping block 67 is easily worn, resulting in inaccurate positioning and misalignment between the first sleeve 641 and the second sleeve 642. The hardness of the damping block 67 is too high, and during installation, the damping block 67 collapses due to the extrusion force.

[0067] When the shaft sleeve 64 is worn or damaged, the original shaft sleeve 64 is disassembled, and the first sleeve 641 and the second sleeve 642 of the present invention are clamped on the two ends of the rod body 631, and then fastened and fixed. Compared with the replacement of the prior art, the time is saved by at least 1 hour, the installation efficiency is effectively improved, and the labor intensity is reduced.

[0068] For the convenience of processing, the above-mentioned first sleeve 641 and second sleeve 642 are both semicircular sleeves, and the first sleeve 641 includes a first end 641-a and a second end 641-c, wherein the first end 641-a is provided with a first screw hole 641-b, and the second end 641-c is provided with a second screw hole 641-d; the second sleeve 642 includes a first mating end 642-a and a second mating end 642-c, the first mating end 642-a is provided with a first positioning hole 642-b, and the second mating end 642-c is provided with a second positioning hole 642-d, and the first sleeve 641 and the second sleeve 642 are fixed by fastening bolts 65.

[0069] In order to improve the surface hardness of the joint and reduce the wear of the joint, the joint of the first sleeve 641 and the second sleeve 642 is subjected to laser heat treatment to obtain a finer hardened layer structure with minimal deformation.

[0070] The specific processing steps of laser heat treatment are as follows: (1) after degreasing, derusting, cleaning and drying the treated surface, a light-absorbing coating is pre-applied on the surface; (2) the surface of the joint is heat-treated by laser, with a laser power of 1500 watts, a spot diameter of 3.0 mm, and a laser beam scanning speed of V = 15 mm / s. At this laser beam scanning speed, the surface hardness of the joint is slightly higher than the hardness of other parts of the first sleeve 641 / second sleeve 642, and at the same time has good wear resistance. The laser makes the surface reach the melting temperature of the material, and the heat treatment time is 35 seconds.

[0071] Grooves are provided on the end faces of the first end 641-a, the second end 641-c, the first mating end 642-a, and the second mating end 642-c, in which the damping block 67 is installed. The length of the damping block 67 is smaller than the height of the first sleeve 641 / the second sleeve 642, and a through hole for passing a bolt is provided in the center of the damping block 67.

[0072] To improve the wear resistance of the inner surfaces of the first and second housings 641, 642, the inner surfaces of the first and second housings 641, 642 are coated with a layer of Ag-graphene composite film. The thickness of the Ag-graphene composite film is 3-5 μm. Through extensive testing, the Ag-graphene composite film coated on the inner surfaces of the first and second housings 641, 642 (using a conventional electroplating method, such as the carburized and quenched parts electroplating process used by our company) has demonstrated high wear resistance, reduced adhesive wear, and excellent thermal conductivity, effectively extending the service life of the first and second housings 641, 642.

[0073] Through cross-sectional observation using FE-SEM (Field Emission Scanning Electron Microscope) and TEM (Transmission Electron Microscope), it was found that a Ag-graphene composite coating was formed on the inner surfaces of the first housing 641 and the second housing 642 , and the surfaces were smooth.

[0074] Subsequent measurements showed that when the thickness of the Ag-graphene composite coating was 1 μm, the preferred orientation was <111> direction, while when the thickness of the Ag-graphene composite coating is 3μm, the preferred orientation is <220> Therefore, from the perspective of crystal structure stability, the film thickness range is 3μm-5μm, which can fully improve the strength and thermal conductivity of the coating.

[0075] In Figure 5, the torsion bar 63 is fixed at one end and bears the load at the other. The torsional deformation of the torsion bar 63 acts as a spring. The movable jaw plate 62 swings in the opposite direction after contacting the strip. Because the torsion bar 63 has a certain preload, it can clamp the strip when the preload is appropriate. The clamping force can be varied according to the thickness of the strip, thus preventing the roll from being out of round due to a wide range of strip thicknesses.

[0076] In addition, the inventors surprisingly found that by twisting the torsion bar 63 and swinging the jaw bar 11, the thick strip head is pressed so that the bent part of the strip head can also fit into the surface of the reel, avoiding the appearance of bulges and reducing the effect of eccentricity of the steel coil.

[0077] The torsion bar 63 is made of hot-rolled spring steel. After heat treatment, its hardness should reach about 50HRC. The materials that can be selected are 40CrNiMoA, 45CrNiMoVA, 50CrVA and 60Si2MnA. Among them, the torsion bar 63 is a high-load part with a large cross-section, which is required to have good fatigue resistance and be able to operate in the range of 200-400°C. Therefore, the preferred material of the present invention is 50CrVA.

[0078] To facilitate assembly between the torsion bar 63 and the base 61, the spindle portion 632 has a hexagonal cross-section and is fitted with a hexagonal sleeve 64. The base 61 has a circular hole in which the hexagonal sleeve 64 is positioned. The end of the torsion bar 63 is formed into a polygonal or involute spline 66 shape, typically a regular hexagon for cost reasons. The distance between opposite sides of the regular hexagon is S = 1.3d = 33mm, and the hexagonal width is B = 1.2d = 30mm. To avoid excessive stress concentration, the transition fillet radius at the junction of the spindle portion 632 and the rod body 631 is R = 3.6d = 90mm.

[0079] The cross-sectional shape of the rod body 631 includes but is not limited to a solid circle, a hollow circle, a rectangle and a polygon, preferably a solid circle. Since the torsion rod 63 is subjected to high stress during operation and the diameter error has a greater impact on its stiffness, materials with surface defects removed by grinding or turning are generally used.

[0080] The tolerance for a 63mm diameter torsion bar is typically JS11. Mechanical strengthening treatments such as shot peening, torsion compression, and rolling can improve fatigue life. Shot peening and torsion compression are generally used simultaneously, but shot peening must precede torsion compression. Using torsion compression alone will yield poor results. Mechanical strengthening treatments do not increase the plastic deformation rate, so the allowable plastic deformation rate of the material must be considered when determining the allowable stress.

[0081] In order to increase the bite force of the movable jaw plate 62, in one possible embodiment of the present invention, a jaw bar 11 is provided on the base 61, and teeth are provided on the jaw bar 11, and the teeth can increase the friction between the jaw bar and the strip steel.

[0082] As shown in Figures 1 and 3, the present invention also provides a closed winding drum with inclined wedges, including a main shaft 1, a pull rod 2, a fan-shaped plate 3, an axial inclined wedge 4, a radial inclined wedge 5 and a jaw device 6. The above-mentioned pull rod 2 drives the axial inclined wedge 4 to the left to move in the groove of the main shaft 1, and the axial inclined wedge 4 drives the radial inclined wedge 5 to move upward through the inclined surface. The above-mentioned radial inclined wedge 5 is provided with a jaw device 6, and the above-mentioned jaw device 6 is the above-mentioned jaw device 6.

[0083] An extension shaft 8 is provided on the outer circumferential surface of the front half of the pull rod 2 ; the extension shaft 8 is fixed to the main shaft 1 by bolts, and the extension shaft 8 can move axially with the pull rod 2 .

[0084] The axially inclined wedge 4 and the radially inclined wedge 5 are mutually matched inclined surface structures, and the angle of the inclined surface is 15°-20°, and the preferred angle is 15°.

[0085] Applying the above-mentioned inclined wedge closed reel to the coiling equipment can better realize the coiling work of the strip steel.

Claims

1. An inclined wedge closed reel jaw device (6), characterized in that: include: The base (61) is assembled in a groove provided on the main shaft (1) and cooperates with the radial wedge (5). The radial wedge (5) is pulled by the pull rod (2) to generate radial movement to lift the base (61); A movable jaw plate (62) is arranged corresponding to the fan-shaped plate (3) to form a jaw; A torsion bar (63) disposed on the base (61), the torsion bar (63) being connected to the movable jaw plate (62) via a key (66); The torsion bar (63) comprises a bar body (631) and an axial or polygonal spindle portion (632) connected to two ends of the bar body (631) by a spline (66); a shaft sleeve (64) is provided on the spindle portion (632); and the torsion bar (63) is respectively connected to the base (61) and the movable jaw plate (62) through the shaft sleeve (64); The shaft sleeve (64) comprises a first sleeve body (641) and a second sleeve body (642); the first sleeve body (641) and the second sleeve body (642) are spliced ​​together via a damping block (4) to form an integral shaft sleeve (64), and are clamped on both ends of the rod body (631).

2. The angled wedge closed reel jaw device (6) according to claim 1, characterized in that: The first sleeve (641) and the second sleeve (642) are both semicircular sleeves, and the first sleeve (641) includes a first end (641-a) and a second end (641-c), wherein the first end (641-a) is provided with a first screw hole (641-b), and the second end (641-c) is provided with a second screw hole (641-d); the second sleeve (642) includes a first mating end (642-a) and a second mating end (642-c), the first mating end (642-a) is provided with a first positioning hole (642-b), and the second mating end (642-c) is provided with a second positioning hole (642-d), and the first sleeve (641) and the second sleeve (642) are fixed by fastening bolts (65).

3. The angled wedge closed reel jaw device (6) according to claim 2, characterized in that: The end faces of the first end (641-a), the second end (641-c), the first mating end (642-a), and the second mating end (642-c) are all provided with grooves, and the damping blocks (67) are installed in the grooves. The length of the damping block (67) is smaller than the height of the first sleeve (641) / the second sleeve (642), and the center of the damping block (67) is provided with a through hole for passing a fastening bolt (65).

4. The angled wedge closed reel jaw device (6) according to claim 3, characterized in that: The spindle portion (632) has a hexagonal cross section and is provided with a hexagonal shaft sleeve (64); a circular hole for providing the hexagonal shaft sleeve (64) is provided on the base (61).

5. The angled wedge closed reel jaw device (6) according to claim 4, characterized in that: The cross-sectional shape of the rod body (631) includes but is not limited to a solid circle, a hollow circle, a rectangle and a polygon.

6. The angled wedge closed reel jaw device (6) according to claim 5, characterized in that: A jaw strip (11) is arranged on the base (61), and teeth for increasing friction are arranged on the jaw strip (11).

7. A closed-type winding drum with an inclined wedge, comprising a main shaft (1), a pull rod (2), a sector plate (3), an axial inclined wedge (4), a radial inclined wedge (5) and a jaw device (6), wherein the pull rod (2) drives the axial inclined wedge (4) to move leftward in the groove of the main shaft (1), the axial inclined wedge (4) drives the radial inclined wedge (5) to move upward through the inclined surface, and the radial inclined wedge (5) is provided with a jaw device (6), characterized in that: The jaw device (6) is the jaw device (6) according to any one of claims 1 to 6.

8. The angled wedge closed reel jaw device (6) according to claim 7, characterized in that: An extension shaft (8) is arranged on the outer circumferential surface of the front half of the pull rod (2); the extension shaft (8) is fixed to the main shaft (1) by means of bolts, and the extension shaft (8) can move axially along with the pull rod (2).

9. The angled wedge closed reel jaw device (6) according to claim 8, characterized in that: The axial inclined wedge (4) and the radial inclined wedge (5) are mutually matched inclined surface structures, and the angle of the inclined surface is 15°-20°.

10. A coiling device, characterized in that: The invention comprises the angled wedge closed reel as described in any one of claims 7 to 9.

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