A sleeve replacement-free flange steel coiling machine

Abstract

This invention relates to a sleeve-based flange-replacement steel coiling machine. The sleeve is installed in a bearing, and a transition flange is added to the end of the sleeve connected to the bending disc. The bending disc is installed on the transition flange. A pressure plate support is connected to the piston rod of a hydraulic cylinder. An inlet guide is installed on the pressure plate support, and the pressure plate is located behind the inlet guide, directly facing the bending disc and pressing against the end face of the steel coil. A bending device is installed at the inlet guide. The upper and lower rollers clamp the flat steel in a staggered manner through a plate groove. When the tail of the flat steel passes through, the cylinder operates to raise the lower roller and bend the flat steel. After the tail of the flat steel passes through, the lower roller descends to return to its original position. This design eliminates the need to replace the sleeve, saving time and improving production efficiency. Adding a bearing and bearing seat in the middle of the sleeve increases its rigidity and reduces bounce during rotation, thus improving the dimensional accuracy of the product. The bending device can shorten or eliminate the length of the tail of the flange steel coil.

Description

Technical Field

[0001] This utility model relates to the field of hot-rolled flat steel, and in particular to a flat steel vertical bending and coiling machine. Background Technology

[0002] Flange steel is widely used in the construction industry and is an essential material for steel piles in building foundation structures. The demand is large. Its production process involves rolling steel billets into long flat steel strips of the required thickness and width through a rolling mill, and then bending and coiling them into spiral steel coils (bending and coiling them horizontally along the horizontal axis to form a spiral shape, which requires large equipment due to the large force) for subsequent processing into flanges.

[0003] Currently, flange steel production mainly uses coiling machines with a spindle-die-core structure. These machines can produce multiple flange steel coils of different specifications on a single machine. This is achieved by equipping one coiling machine with various sleeves, dies, and bending discs. The bending discs, dies, and sleeves are selected and combined according to the product specifications. Each time a new specification is produced, these components must be replaced. Production practice has shown that this type of coiling machine has many shortcomings, the most typical being: 1. The sleeve has a long cantilever, and the die core rotates and bounces significantly under stress, resulting in large deviations in the inner and outer diameters of the coiled flange steel coil, affecting product quality and increasing the correction costs during later flange manufacturing; 2. Changing product specifications requires replacing many components, affecting production efficiency. Replacing the sleeves of such large equipment involves reducers, which are large, heavy, and complex, resulting in very high labor intensity; 3. The flange steel coil ends with a long, curled-up tail (this curled-up portion is not formed and cannot be used to make flanges, requiring trimming during later flange manufacturing), resulting in significant waste and impacting economic efficiency. Summary of the Invention

[0004] The purpose of this utility model is to provide a flange steel coiling machine with a pre-bent flat steel tail that increases sleeve support and reduces bounce, which aims to solve the problems of large deviations in the inner and outer diameters of flange steel coils, long tail extensions of flange steel coils, and troublesome sleeve replacement.

[0005] The technical solution adopted by this utility model is as follows: a sleeve-type flange-free steel coiling machine, including a base and a motor mounted on the base, a coupling with a brake wheel connecting the motor and a reducer, a sleeve and a mandrel mounted on the flange of the reducer, a die core mounted on the head of the mandrel, and a bending disc mounted on the end face of the sleeve. The sleeve, die core, and bending disc all rotate with the reducer. The motor is a variable frequency speed control motor. A support is mounted on the base below the middle of the sleeve, a bearing seat is mounted on the support, a bearing is mounted on the bearing seat, and the sleeve is mounted in the bearing. A transition flange is added to the end of the sleeve connected to the bending disc, and the bending disc is mounted on the transition flange. A slide rail and a hydraulic cylinder are also mounted on the base. A pressure plate support is mounted on the slide rail, and the pressure plate support is connected to the piston rod of the hydraulic cylinder. A cylinder is mounted on the pressure plate support. The device includes a pressure plate and an inlet guide. The inlet guide consists of an inlet formed by a vertical roller at the inlet, a cantilevered support roller below the inlet, and a pressure plate behind the inlet, directly facing the bending plate. The flat steel head enters the receiving groove of the bending plate through the inlet guide and forms a steel coil on the mold core as the mandrel rotates. The pressure plate presses against the end face of the steel coil. A bending device is installed at the inlet guide. The bending device includes a frame mounted on the pressure plate support. An upper roller and a lower roller, each with a groove in the middle, are installed at a staggered position along the flat steel's forward path on the frame. The upper roller is fixed above the frame, and the lower roller is driven by a cylinder and installed below the frame. The upper and lower rollers clamp the flat steel at a staggered position through the grooves. When the tail of the flat steel passes through, the cylinder moves to raise the lower roller and bend the flat steel. After the tail of the flat steel passes through, the lower roller descends back to its original position.

[0006] A further technical solution of this utility model is: the bearing adopts a cylindrical roller self-aligning bearing, and high-temperature resistant rubber sealing rings are installed on both sides of the bearing through cover; in order to meet the requirements of large and stable installation of the sleeve and to cope with high-temperature working environment.

[0007] A further technical solution of this utility model is: it also includes a winding assist mechanism, which includes a winding assist bracket mounted on a base, a crossbeam mounted on the winding assist bracket, two transverse guide shafts mounted on the crossbeam, a transverse hydraulic cylinder mounted on the right side of the crossbeam, the piston rod head of the transverse hydraulic cylinder connected to the transverse box, the transverse box being driven by the transverse hydraulic cylinder to slide on the two transverse guide shafts, four lifting guide rods vertically mounted in the transverse box, a lifting box mounted on the four lifting guide rods, a vertical hydraulic cylinder mounted on the transverse box, and the piston rod head of the vertical hydraulic cylinder connected to the lifting box. The connection involves a vertical hydraulic cylinder driving the lifting box to move up and down along the lifting guide rod. The lifting box is equipped with extrusion rollers and side pressure rollers. A transverse hydraulic cylinder causes the extrusion rollers and side pressure rollers to move horizontally, while a vertical hydraulic cylinder causes them to move up and down. Under the action of the vertical hydraulic cylinder, the extrusion rollers are tangential to the outer diameter of the flanged steel coil, pressing towards the center of the coil to make its outer circle regular. The magnitude of the vertical extrusion force can be adjusted through the hydraulic system of the vertical hydraulic cylinder. Under the action of the transverse hydraulic cylinder, the side pressure rollers press against the side of the steel coil to eliminate the wavy shape of the coil's end face, making the end face more flat.

[0008] A further technical solution of this utility model is: the extrusion rollers are two in number and symmetrically designed with parallel transverse guide axes; this design makes the force more balanced, the stability better, and the extrusion effect better.

[0009] A further technical solution of this utility model is: the vertical hydraulic cylinder of the winding mechanism is mounted with a central trunnion, the head of the hydraulic cylinder piston rod is connected to the lifting box, the axes of the extrusion roller and the side pressure wheel are arranged vertically, and graphite copper bushing bearings are installed inside the extrusion roller and the side pressure wheel; the rolling friction resistance of the extrusion roller and the side pressure wheel is small, and no lubricant needs to be added during use.

[0010] A further technical solution of this utility model is: when the transition flange has a smaller diameter, one end of the transition flange is connected to the sleeve by an outer bolt, and the other end of the transition flange is connected to the elbow by an inner bolt; the small outer diameter flange steel is coiled by replacing the transition flange and elbow with smaller sizes.

[0011] A further technical solution of this utility model is: when the transition flange has a larger diameter, one end of the transition flange is connected to the sleeve by an outer bolt, and the other end of the transition flange is connected to the elbow by an outer bolt; the large-diameter flange steel is rolled up by replacing the transition flange and elbow with a larger size.

[0012] A further technical solution of this utility model is: multiple small holes are opened on the cylindrical wall of the sleeve to facilitate heat dissipation and rapid water cooling in high-temperature environments.

[0013] The beneficial effects of this utility model are as follows: Due to the adoption of the above technical solution, the sleeve-free flange steel coiling machine of this utility model adds a transition flange to one end of the sleeve connected to the bend plate. When changing product specifications, only the transition flange and bend plate need to be replaced, without replacing the sleeve, saving time and improving production efficiency. At the same time, since the sleeve does not need to be replaced, a bearing and bearing seat can be added in the middle of the sleeve to improve the rigidity of the sleeve and reduce the bounce when the sleeve rotates, which can improve the dimensional accuracy of the product. A top bending device is set at the inlet guide, which can shorten or eliminate the length of the upturned end of the flange steel coil. Attached Figure Description

[0014] Figure 1 This is a front structural diagram of a sleeve-replaceable flange steel coiler according to the present invention;

[0015] Figure 2 This is a top view of the sleeve-replaceable flange steel coiling machine described in this utility model;

[0016] Figure 3 This is a side view of the sleeve-replaceable flange steel coiling machine of the present invention.

[0017] Figure 4 This is a schematic diagram of the connection structure of a sleeve-type flangeless steel coiler with a smaller diameter as described in this utility model;

[0018] Figure 5 This is a schematic diagram of the connection structure of a sleeve-type flangeless steel coiler with a large diameter as described in this utility model;

[0019] Figure 6 This is a front structural diagram of the winding mechanism of the sleeve-replaceable flange steel winding machine described in this utility model;

[0020] Figure 7 This is a side view of the winding mechanism of the sleeve-replaceable flange steel winding machine described in this utility model;

[0021] Figure 8 This is a schematic diagram of the pressure plate structure of a sleeve-type flange-replacement steel coiling machine according to the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] Example:

[0024] like Figure 1-8As shown, a sleeve-type flange-free steel coiling machine comprises the following components: Motor 1 is a variable frequency speed-regulating motor, and the coiling machine speed can be set as needed; Brake wheel 2, and coupling 3 with brake wheel; Reducer 4 has a welded housing, helical hard-tooth gears, and rolling bearings, with its own oil pump for circulating lubrication; Sleeve 5 is a welded steel plate structure, connected to the reducer flange on one side and to the transition flange on the other side, with several small holes on the sleeve's cylindrical wall for heat dissipation; Coiling assist mechanism 6 includes a pressing roller 601 and a side pressure roller 602, the housing of the coiling assist mechanism sliding on two transverse guide shafts, and is controlled by a transverse guide shaft. Driven by a hydraulic cylinder, the extrusion roller and side pressure roller can also slide on the vertical guide shaft, driven by a vertical hydraulic cylinder; bearing seat 7 is a sleeve support, connected by a self-aligning roller bearing; transition flange 8; bend plate 9, which comes in many varieties and is used with transition flange and die core to adapt to flange steel coil specifications with different inner diameters, outer diameters and thicknesses; die core 10 is used to match the bend plate, which comes in many varieties to adapt to various flange steel coil specifications; mandrel 11, during winding, the mandrel rotates under the drive of the large gear of the reducer through the key, rotating in the same direction and at the same speed as the sleeve, and the flat steel is wound into a spiral ring around the die core under the action of the bend plate. After winding is completed, the sleeve, bending disc, and mandrel stop rotating. Under the action of two unwinding hydraulic cylinders 22, the mandrel, carrying the die core, is pulled back from inside the flange coil. At this time, the mandrel and die core are retracted into the space of the sleeve. The flange steel coil falls onto the receiving trolley (another piece of equipment). The steel coil is transported away, and the mandrel and die core return to the initial winding position under the reaction action of the hydraulic cylinder, waiting for the winding of the next flat steel. The center 12 supports the mandrel by pressing against it with its pointed tip. The center shaft is equipped with rolling bearings, so that the center rotates together with the mandrel. The center frame 13 is used to install the center and is a welded steel plate structure. The hydraulic cylinder 14 is used to drive the pressure plate. The pressure plate support 15 is a welded steel plate structure. The pressure plate 16 is used to press the end face of the steel coil during winding. The pressure plate support is connected to the hydraulic cylinder and moves under the action of the hydraulic cylinder.During winding, the pressure plate always presses against the end face of the steel coil to ensure a tighter winding. During winding, the hydraulic cylinder experiences a certain back pressure. The pressure exerted by the steel coil on the pressure plate is greater than the back pressure set by the hydraulic cylinder, causing the hydraulic cylinder to slowly retract under the action of the steel coil. After the steel coil is wound, the hydraulic cylinder quickly retracts to its limit position. After the steel coil is transported away, the pressure plate returns to its initial position under the action of the hydraulic cylinder, awaiting the winding of the next flat steel. The rolling linear guide sleeve support 17 is a welded steel plate structure. The rolling linear guide sleeve pair 18 supports the mandrel. During unwinding, the mandrel moves within the hollow sleeve of the reducer, its end supported by the rolling linear guide sleeve pair and sliding on the guide rod. The base 19 is a welded structure used to install components. Supporting equipment; a top bending device 20, which applies a pre-bending force to the tail of the flat steel, so that the tail of the flat steel is pre-bent before entering the coiler to eliminate the tail lifting. The top bending device structure includes a welded frame, upper and lower rollers, and a groove in the middle of the roller body. The upper roller 201 is fixed, and the lower roller 202 is driven by a cylinder 203. When bending, the cylinder is activated, and the lower roller rises. After the tail of the flat steel passes through, the lower roller descends back to its original position. An inlet guide 21 is used to smoothly guide the head of the flat steel into the groove of the bending disc. The inlet guide structure includes a welded bracket, and cantilevered rollers and vertical rollers are provided, all of which are rolling bearings. The rollers and vertical rollers are made of high-strength wear-resistant materials and have a long service life. The opening degree of the guide can be randomly adjusted according to the thickness of the flat steel being introduced.

[0025] Since the sleeve is fixed and not replaced with the product, the solution is to add a transition flange to the end where the sleeve connects to the elbow. When the product specifications change, only the transition flange and elbow need to be replaced. Compared to the original method, the sleeve remains stationary, reducing the number of replacement parts, saving time, and improving production efficiency. Furthermore, since the sleeve does not need to be replaced, a support can be added to the middle of the sleeve to increase its rigidity and reduce bounce during rotation, thus improving the dimensional accuracy of the product. Here, there are two types of transition flanges: one is used for producing flange coils with smaller diameters, such as... Figure 4 The bolts connecting to the bend plate are shown on the inside. Another type is used for producing flange coils with larger diameters, such as... Figure 5 The connecting bolts to the elbow are shown on the outside. There are two types and three types of transition flanges, which are compatible with dozens of elbows. The installation dimensions of the elbow are matched with the three types of transition flanges, and the dimensions of the forming steel coils for the elbows are different.

[0026] A bearing is added in the middle of the sleeve as a fixed fulcrum. The bearing is a cylindrical roller self-aligning bearing, and high-temperature resistant rubber seals are installed on both sides of the bearing through cover. The bearing housing is mounted on a support welded from steel plates. This fulcrum increases the axial rigidity of the sleeve, allowing it to rotate around the axis center when rotating, thereby reducing the dimensional deviation of the inner diameter of the coiled flange steel coil.

[0027] To ensure the outer diameter of the steel coil is round, a coiling aid mechanism was designed. The mechanism's effect on the coil consists of two parts: one part is the compression of the outer diameter of the coil, such as... Figure 6and Figure 7 As shown, under the action of the vertical hydraulic cylinder of the coiling mechanism, the two extrusion rollers 601 are tangential to the outer diameter of the flange steel coil and extrude towards the center of the steel coil to make its outer circle regular. The magnitude of the extrusion force can be adjusted by the hydraulic system. The extrusion rollers are equipped with sliding bearings and are lubricated with dry oil. The extrusion rollers roll and rub against the outer diameter of the steel coil, resulting in low resistance and low wear. Another part is the extrusion of the side of the steel coil. The side pressure roller 602, under the action of the transverse hydraulic cylinder of the coiling mechanism, pushes against the side of the steel coil to eliminate the wavy shape of the end face of the steel coil and make the end face tend to be flat. The side pressure roller rotates under the drive of the steel coil and rolls and rubs, which is different from other types of side pressure rollers that cannot rotate and generate sliding friction. As the steel coil is wound, the side pressure roller is given a backward thrust. After balancing the back pressure of the transverse hydraulic cylinder, the side pressure roller and the box on which the side pressure roller is installed move backward together.

[0028] The inlet is equipped with a bending device. Upon detecting the tail of the steel, the lower roller of the bending device is raised after a few seconds of delay. The upper roller of the bending device remains stationary. As a small section of the tail of the steel passes through the lower roller, the lower roller is raised, forcing the tail of the flat steel to bend. The degree of bending depends on how much the lower roller is raised. Grooves are cut in the middle of both the upper and lower rollers to prevent the tail of the flat steel from skewing as it passes. The lower roller is driven by a cylinder. After the tail of the flat steel passes, the cylinder resets, awaiting the next lift. Through the pre-bending of the bending machine, the length of the upturned end of the flange steel coil can be shortened or eliminated.

[0029] The above solutions are the core technologies of this winding machine, playing a key role in improving the dimensional accuracy and quality of the products, and are of great significance to the overall level of the winding machine.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sleeve-type flange-replacement-free steel coiling machine, comprising a base and a motor mounted on the base, a coupling with a brake wheel connecting the motor and a reducer, and further comprising a sleeve and a mandrel mounted on the flange of the reducer, a die core mounted on the head of the mandrel, and a bending disc mounted on the end face of the sleeve, wherein the sleeve, die core, and bending disc all rotate with the reducer, characterized in that: The motor is a variable frequency speed control motor. A support is installed on the base below the middle of the sleeve, a bearing seat is installed on the support, a bearing is installed on the bearing seat, and the sleeve is installed in the bearing. An intermediate flange is added to the end of the sleeve that connects to the bending disc, and the bending disc is installed on the intermediate flange. A slide rail and a hydraulic cylinder are also installed on the base. A pressure plate support is installed on the slide rail and is connected to the piston rod of the hydraulic cylinder. A pressure plate and an inlet guide are installed on the pressure plate support. The inlet guide includes an inlet consisting of a vertical roller at the inlet. Below the inlet is a cantilever roller, and behind the inlet is the pressure plate, which faces the bending disc. The flat steel head enters through the inlet guide and then enters the receiving groove of the bending disc. As the mandrel rotates, it forms a steel coil on the mold core, and the pressure plate presses against the end face of the steel coil. A bending device is set at the inlet guide. The bending device includes a frame, which is mounted on the pressure plate support. On the frame, upper and lower rollers with grooves in the middle are installed at different positions along the flat steel's forward path. The upper roller is fixed above the frame, and the lower roller is driven by a cylinder and installed below the frame. The upper and lower rollers clamp the flat steel at different positions through the grooves. When the tail of the flat steel passes through, the cylinder moves to make the lower roller rise and bend the flat steel. After the tail of the flat steel passes through, the lower roller descends back to its original position.

2. The sleeve-type flange-free steel coiling machine according to claim 1, characterized in that: The bearing is a cylindrical roller self-aligning bearing, and high-temperature resistant rubber seals are installed on both sides of the bearing through cover.

3. The sleeve-type flange-replacement-free steel coiling machine according to claim 1, characterized in that: It also includes a winding assist mechanism, which includes a winding assist bracket mounted on a base, a crossbeam mounted on the winding assist bracket, two transverse guide shafts mounted on the crossbeam, a transverse hydraulic cylinder mounted on the right side of the crossbeam, the piston rod head of the transverse hydraulic cylinder connected to the transverse box, the transverse box being driven by the transverse hydraulic cylinder to slide on the two transverse guide shafts, four lifting guide rods vertically mounted in the transverse box, a lifting box mounted on the four lifting guide rods, a vertical hydraulic cylinder mounted on the transverse box, the piston rod head of the vertical hydraulic cylinder connected to the lifting box, the vertical hydraulic cylinder driving the lifting box to move up and down on the lifting guide rods, a pressing roller and a side pressure roller mounted on the lifting box, the transverse hydraulic cylinder causing the pressing roller and side pressure roller to move horizontally, and the vertical hydraulic cylinder causing the pressing roller and side pressure roller to move up and down.

4. A sleeve-type flange-replacement-free steel coiling machine according to claim 3, characterized in that: The extrusion rollers are two in number and symmetrically designed with parallel transverse guide axes.

5. A sleeve-type flange-replacement-free steel coiling machine according to claim 4, characterized in that: The vertical hydraulic cylinder of the winding mechanism is mounted with a central trunnion. The head of the hydraulic cylinder piston rod is connected to the lifting box. The axes of the extrusion roller and the side pressure roller are arranged vertically, and graphite copper bushing bearings are installed inside the extrusion roller and the side pressure roller.

6. A sleeve-type flange-replacement-free steel coiling machine according to claim 1, characterized in that: When the transition flange has a smaller diameter, one end of the transition flange is connected to the sleeve by an outer bolt, and the other end of the transition flange is connected to the elbow by an inner bolt.

7. A sleeve-type flange-replacement-free steel coiling machine according to claim 1, characterized in that: When the transition flange has a large diameter, one end of the transition flange is connected to the sleeve by an outer bolt, and the other end of the transition flange is connected to the elbow by an outer bolt.

8. A sleeve-type flange-free steel coiling machine according to claim 1, characterized in that: The sleeve has multiple small holes on its cylindrical wall.

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