CN110653286A - Multi-head spiral coiler without internal stress - Google Patents

Abstract

The invention relates to the technical field of spiral pipe coil machines, in particular to a multi-head spiral pipe coil machine without internal stress. The problems of technical accuracy and internal stress of existing coil pipes cannot be solved at the same time. The multi-head spiral pipe coil machine without internal stress includes a body and the base located under the body, the side of the body is provided with a feeding device, and the two ends of the base are provided with fixed frames, the body includes a main shaft, a plurality of rolling shafts, a rolling shaft support seat and internal and external meshing gears, and both ends of the main shaft are fixed on the fixed frame , each rolling shaft is rotatably connected with the rolling shaft support seat, the rolling shaft is evenly arranged on the outer circumference of the main shaft through the rolling shaft support seat, and an openable and closable locking device is arranged outside the machine body to press the tube blank on the surface of the machine body, and the base is provided with The guide rail is provided with a hydraulic cylinder for the opening and closing locking device to move on the base. Through the locking device and the rotating rolling shaft, the internal stress is eliminated and the dimensional accuracy of the spiral coil is ensured. good development prospects.

Description

Multi-head helical coil machine without internal stress

technical field

The invention relates to the technical field of spiral pipe coil machines, in particular to a multi-head spiral pipe coil machine without internal stress.

Background technique

At present, there are two ways to make a multi-head spiral tube coil machine: one is to use the principle of a three-roll or four-roll profile bending machine to roll through a multi-slot die, and the other is to use a certain diameter expandable and shrinkable drum. , fix multiple tube blanks on the drum, and rotate the drum through power transmission, so that the tube blanks are wound on the drum.

The former implementation has two limitations: 1. The number of disposable coils is limited. 2. Due to the springback of the bending radius of each head tube blank, it is difficult to ensure the consistency of the bending radius of each tube blank, resulting in spiral coils. The dimensional accuracy of the product cannot be guaranteed. The latter implementation is easier to ensure the dimensional accuracy of the spiral coil product, but the large internal stress in the coil cannot be eradicated, which affects the next coating process of the spiral coil (the coating is easy to fall off. ), especially for manufacturers who need to coat ceramic materials on the inner wall, it is a fatal flaw.

Therefore, there is a need for a coil machine device whose precision meets construction requirements and can eliminate internal stress as much as possible.

SUMMARY OF THE INVENTION

In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a multi-head spiral coil machine without internal stress, which solves the problem that the technical precision and internal stress of the existing coil cannot be solved simultaneously.

Its technical scheme is that a multi-head spiral coil machine without internal stress includes a body for winding the tube and a base located under the body to support and fix the base, the base is in contact with the ground, and the side of the body is provided with a tube blank. The feeding device enters the body for winding. During the entire coiling process, the feeding device advances at a synchronous speed to ensure that the tube blank is evenly and smoothly transferred to the body for the next coiling work. The two ends of the base are provided with Fixing frames, each of the fixing frames is perpendicular to the base and fixed, and the fixing method can be fixed by bolts. The body includes a main shaft, a plurality of rolling shafts, a front support seat of the rolling shaft and a rear support seat of the rolling shaft. The rolling shaft The side of the front fixing frame close to the fixing frame is provided with internal and external meshing gears for fixing the tube blank. Both ends of the main shaft are fixed on the fixing frame. The main shaft only serves as a support and does not rotate by itself. The front support seat of the shaft is rotatably connected, and the other end of each rolling shaft is rotatably connected to the rear support seat of the rolling shaft. The rolling shaft is evenly arranged in the circumferential direction of the outer periphery of the main shaft through the rolling shaft support seat. After passing through the fixed frame, it is stuck on the internal and external meshing gears, and it rotates under the influence of the rotation of the internal and external meshing gears. The front fixed frame of the rolling shaft and the rear fixed frame of the rolling shaft rotate on the auxiliary rolling shaft, and they do not rotate or provide force. When the inner and outer meshing gear rotates, it drives the tube blank fixed on it to wrap around the rotating rolling shaft. The residual stress generated during the winding process is provided with an openable and closable locking device that compresses the surface of the body and surrounds the tube blank. When the tube blank is fixed on the internal and external meshing gears, the locking device is in an open state. After the installation is completed, the locking device is in a closed state, and the tube blank is pressed against the outer surface formed by multiple rolling shafts. During the winding process, the tube blank is tracked and corrected to ensure its dimensional accuracy. A guide rail is arranged, and a hydraulic cylinder is arranged below the guide rail for the openable and closable locking device to move on the base to realize opening and closing.

Further, each of the locking devices includes a plurality of correction rollers, a correction roller support frame and two support seats that are opened and closed by moving, and each of the support seats is provided with a semicircular groove and two semicircular grooves. The groove forms a cylindrical channel outside the machine body when the two support seats are locked. Each of the correction rollers is installed on the support frame of the correction roller and is evenly arranged on the support seat according to the circumferential direction. The cylindrical channel and the rolling shaft are connected. An annular space that can compress the tube blanks is formed between them, and the annular space is consistent with the diameter of the tube blanks so as to realize the compression of the multi-tube blanks by the locking device.

Further, the side of the inner and outer meshing gears close to the front support seat of the rolling shaft is provided with a plurality of pipe end clamps for clamping the rolling wheel, and each of the pipe end clamps is evenly distributed on the edge of the inner and outer meshing gears according to the circumferential direction, and the pipe end is recorded. The number of clamps is n, each time a tube blank is installed, the internal and external meshing gears are rotated by a fixed angle θ, where θ=360/n, all tube blanks are clamped, open the hydraulic cylinder to push the two open support seats to the middle , and lock it, the inner and outer meshing gears drive the tube end clamp and the rolling shaft to rotate, so that the tube blank is wound on the rolling shaft, and the correction roller and the tube blank are in a state of rolling friction, which can well eliminate the tube blank The residual stress generated during the winding process, and the locking device limits the free springback error of the tube blank, and the accuracy of the coil tube is guaranteed.

Further, the inner and outer meshing gears are provided with a slot hole for the main shaft to pass through and a plurality of grooves for the rolling shaft to be inserted, and a plurality of slot holes corresponding to each of the grooves are arranged on the front support seat of the rolling shaft, The rear support seat of the rolling shaft is provided with a slot hole for each of the rolling shafts to rotate, and the end of each of the rolling shafts passing through the slot hole on the front support seat of the rolling shaft and falling into the groove is provided with a gear. The inner and outer meshing gears transmit force through the external power to drive the outer teeth of the inner and outer meshing gears, thereby driving the inner and outer meshing gears to rotate. The inner and outer meshing gears are made with inner gears, and with the rotation of the inner and outer meshing gears, the shaft ends of the rolling shafts are driven. The gear of the part rotates, so that the rolling shaft produces an autobiography.

Furthermore, a bearing is arranged in the slot hole of the inner and outer meshing gears, and the inner wall of the bearing is connected with the outer diameter of the main shaft by interference, so that the inner and outer meshing gears rotate and the main shaft does not move.

Furthermore, support rollers to increase the strength of the body are installed between the main shaft and the rolling shaft, and the number of the rolling shafts is an integer multiple of the number of the support rollers.

The technical effect of the present invention is that the tube blank is limited between the locking device and the rolling shaft, and the correction rollers on the locking device that are in contact with the tube blank and the rolling shaft and the tube blank are all rolling frictions, thereby eliminating the tube blank from being in contact with the tube blank. For the residual stress generated in the winding process, the locking device compresses the tube blank to a certain extent. Under the corrective action of the correction roller, the tube blank moves forward into the body with the premise that the feeding device maintains the synchronous speed to ensure that each The consistency of the bending radius of the tube blank ensures the dimensional accuracy of the spiral coil.

Description of drawings

Figure 1 is a schematic diagram of the front structure of the present invention.

2 is a schematic side view of the structure of the locking device of the present invention in a closed state.

FIG. 3 is a schematic structural diagram of the locking device of the present invention in an open state.

Figure 4 is a schematic view of the side structure of the internal and external meshing gears of the present invention.

Figure 5 is a schematic view of the front structure of the internal and external meshing gears of the present invention.

1. Body, 2. Main shaft, 3. Internal and external meshing gears, 4. Pipe end clamp, 5. Front support seat of rolling shaft, 6. Rolling shaft, 7. Internal support roller, 8. Back support seat of rolling shaft, 9. Calibration Roller, 10, Correction roller support frame, 11, Guide rail, 12, Tracking feeding device, 13, Tube blank, 14, Hydraulic cylinder, 15, Support seat, 16, Fixed frame, 17, Bearing, 18, Gear, 19, base.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. Terms indicating a direction or positional relationship are based on the direction or positional relationship shown in the drawings, which are only for convenience of description, and do not indicate or imply that a device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be It is construed as a limitation of the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In addition, it should also be noted that, in the description of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a It is a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Embodiment 1: As shown in Figures 1 to 5, a multi-head spiral coil machine without internal stress includes a body 1 for winding the pipe and a base located under the body 1 for supporting and fixing, and the base is in contact with the ground, The side of the body 1 is provided with a feeding device 12 for the tube blanks 13 to enter the body 1 for winding. During the entire coiling process, the feeding device 12 advances at a synchronous speed to ensure that the tube blanks 1 are even and smooth to the body. 1, to carry out the next coil work, the two ends of the base are provided with fixing frames 16, each of the fixing frames 16 is perpendicular to the base and fixed, and the fixing method can be fixed by bolts, and the body 1 includes the main shaft 2, A plurality of rolling shafts 6 , the front support seat 5 of the rolling shaft and the rear support seat 8 of the rolling shaft, the front fixing frame 5 of the rolling shaft close to the fixing frame 16 is provided with internal and external meshing gears 3 for fixing the tube blank, and the main shaft 2 Both ends are fixed on the fixed frame 16, the main shaft 2 only serves as a support, and does not rotate by itself. One end of each of the rolling shafts 6 is rotatably connected to the front support seat 5 of the rolling shaft, and the other end of each of the rolling shafts 6 is connected to the rolling shaft. The rear support seat 8 is rotatably connected, and the rolling shaft 6 is evenly arranged on the outer circumference of the main shaft 2 through the rolling shaft support seat. Rotation is caused by the rotation of the internal and external meshing gears 3. The front fixing frame of the rolling shaft and the rear fixing frame of the rolling shaft rotate on the auxiliary rolling shaft, and they do not rotate or provide force. The internal and external meshing gears 3 rotate at the same time. , drive the tube blank fixed on it to be wound on the rotating rolling shaft, there is rolling friction between the tube blanks 13 and the rolling shafts 6, so that the residual tube blank 13 generated during the winding process can be well eliminated. stress, the outside of the body 1 is provided with an openable and closable locking device that presses the surface of the body 1 around the tube blank 13. When the tube blank 13 is fixed on the internal and external meshing gears 3, the locking device is in an open state and is installed. After completion, the locking device is in a closed state, and the tube blank is pressed against the outer surface formed by the multiple rolling shafts. During the winding process, the tube blank is tracked and corrected to ensure its dimensional accuracy. A guide rail 11 is arranged, and a hydraulic cylinder 14 is arranged below the guide rail 11 for the openable and closable locking device to move on the base to realize opening and closing.

Embodiment 2: On the basis of Embodiment 1, each of the locking devices includes a plurality of correction rollers 9, a correction roller support frame 10 and two support seats 15 that are opened and closed by moving. Semi-circular grooves are opened, and the two semi-circular grooves form a cylindrical channel outside the body 1 when the two support bases 15 are locked. The directions are evenly arranged on the support seat 15, an annular space that can compress the tube blanks 13 is formed between the cylindrical channel and the rolling shaft, and the annular space is consistent with the diameter of the tube blanks to realize the pressing of the multi-tube blanks by the locking device. The inner and outer meshing gears 3 are provided with a plurality of tube end clamps 4 for clamping the scroll wheel 6 on the side close to the front support seat 5 of the rolling shaft, and the tube end clamps 4 are evenly distributed on the inner and outer meshing gears 3 according to the circumferential direction. Edge, record the number of tube end clamps as n, each time a tube blank is installed, rotate the internal and external meshing gears by a fixed angle θ, where θ=360/n, all tube blanks are clamped, open the hydraulic cylinder 14 to open the two The supporting seat 15 is pushed to the middle and locked, and the inner and outer meshing gears 3 drive the tube end fixture 4 and the rolling shaft 6 to rotate, so that the tube blank 13 is wound on the rolling shaft 6, and the calibration roller 9 and the tube blank 13 In the state of rolling friction, the residual stress generated by the tube blank 13 during the winding process can be well eliminated, and the locking device limits the free springback error of the tube blank 13, and the accuracy of the coil tube is guaranteed.

Embodiment 3: On the basis of Embodiment 2, the inner and outer meshing gears 3 are provided with a slot hole for the main shaft to pass through and a plurality of grooves for the rolling shaft 6 to be inserted into. A slot hole corresponding to each of the grooves, the rear support seat 8 of the rolling shaft is provided with a slot hole for each of the rolling shafts 6 to rotate, and each of the rolling shafts 6 is connected from the front support seat 5 of the rolling shaft. The end that passes through and falls into the groove is provided with a gear 18. The internal and external meshing gears 3 transmit force through external power to drive the external teeth of the internal and external meshing gears 3, thereby driving the internal and external meshing gears 3 to rotate. There is an internal gear ring, and with the rotation of the internal and external meshing gears 3, the gears 18 at the ends of the shafts of the rolling shafts 6 are driven to rotate, so as to make the rolling shafts 6 produce self-transmission, and the slots of the internal and external meshing gears 3 are provided with bearings 17. The inner wall of the bearing 17 is connected with the outer diameter of the main shaft 2 by interference, so as to achieve the purpose that the inner and outer meshing gears 3 rotate and the main shaft does not move.

In the above embodiment, the support rollers 7 for increasing the strength of the body 1 are installed between the main shaft 2 and the rolling shaft 6 , and the number of the rolling shafts 6 is an integer multiple of the number of the support rollers 7 .

The technical effect of the present invention is that the tube blank is limited between the locking device and the rolling shaft, and the correction rollers on the locking device that are in contact with the tube blank and the rolling shaft and the tube blank are all rolling frictions, thereby eliminating the tube blank from being in contact with the tube blank. For the residual stress generated in the winding process, the locking device compresses the tube blank to a certain extent. Under the corrective action of the correction roller, the tube blank moves forward into the body with the premise that the feeding device maintains the synchronous speed to ensure that each The consistency of the bending radius of the tube blank ensures the dimensional accuracy of the spiral coil.

The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the present invention. Without departing from the principles of the present invention, those skilled in the art can also make many modifications and improvements, which should also be regarded as the protection scope of the present invention.

Claims (6)

1. The multi-head spiral coiler without internal stress comprises a coiler body (1) and a base (19) located below the coiler body (1), wherein a feeding device (12) for a pipe blank (13) to enter the coiler body (1) to be wound is arranged on the side edge of the coiler body (1), the multi-head spiral coiler is characterized in that fixing frames (16) are arranged at two ends of the base, the coiler body (1) comprises a main shaft (2), a plurality of rolling shafts (6), a rolling shaft front supporting seat (5) and a rolling shaft rear supporting seat (8), an internal and external meshing gear (3) for fixing the pipe blank is arranged on one surface, close to the fixing frame (16), of the rolling shaft front fixing frame (5), two end portions of the main shaft (2) are fixed on the fixing frames (16), one end of each rolling shaft (6) is rotatably connected with the rolling shaft front supporting seat (5), and the other end of each rolling shaft (6) is rotatably connected with the, the rolling shaft (6) is uniformly arranged in the peripheral circumferential direction of the main shaft (2) through a rolling shaft supporting seat, an openable locking device for pressing a pipe blank (13) on the surface of the machine body (1) is arranged outside the machine body (1), a guide rail (11) is arranged on the base (19), and a hydraulic cylinder (14) is arranged below the guide rail (11) and used for the openable locking device to move on the guide rail (11).

2. The internal stress-free multi-head spiral pipe coiling machine as recited in claim 1, wherein each locking device comprises a plurality of correction rollers (9), a correction roller support frame (10) and two support frames (15) which can be opened and closed through movement, each support frame (15) is provided with a semicircular groove, the semicircular grooves form a cylindrical channel which is positioned outside the machine body (1) in a locking state of the two support frames (15), each correction roller (9) is installed on the correction roller support frame (10) and evenly distributed on the support frames (15) according to the circumferential direction, and an annular space which can compress a pipe blank (13) is formed between the cylindrical channel and a rolling shaft.

3. The multi-head spiral pipe coiling machine without internal stress as recited in claim 1, characterized in that a plurality of pipe end clamps (4) for clamping the rolling wheels (6) are arranged on one surface of the internal and external meshing gears (3) close to the front supporting seat (5) of the rolling shaft, and each pipe end clamp (4) is uniformly distributed on the edge of the internal and external meshing gears (3) according to the circumferential direction.

4. The machine according to claim 1, wherein the internally and externally meshed gears (3) are provided with a groove hole for a main shaft to pass through and a plurality of grooves for rolling shafts (6) to be inserted into, the front support base (5) of the rolling shafts is provided with a plurality of groove holes corresponding to the respective grooves, the rear support base (8) of the rolling shafts is provided with a groove hole for each rolling shaft (6) to rotate, and each rolling shaft (6) is provided with a gear (18) at one end which passes through the groove hole of the front support base (5) of the rolling shafts and falls into the groove.

5. The multi-head spiral pipe coiling machine without internal stress as defined in claim 4, wherein the slotted hole of the internal and external meshing gears (3) is provided with a bearing (17), and the inner wall of the bearing (17) is in interference connection with the outer diameter of the main shaft (2).

6. The machine for coiling pipes without internal stress according to claim 1, characterized in that supporting rollers (7) are installed between the main shaft (2) and the rolling shafts (6) to increase the strength of the machine body (1), the number of rolling shafts (6) being an integer multiple of the number of supporting rollers (7).

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