A CNC coiling machine for large-diameter Archimedean spiral coils

Abstract

A numerically controlled coil winding machine for large-diameter Archimedean spiral lines, comprising a continuous bending device and a material receiving rack. The material receiving rack includes a support frame. The continuous bending device is located on one side of the support frame and is close to the support frame. A sliding bracket is slidably arranged on the upper part of the support frame, and the sliding bracket is arranged to move back and forth along a horizontal straight line direction towards the continuous bending device. Horizontally arranged supporting rollers are circumferentially distributed around the middle of the sliding bracket; strip-shaped chutes are arranged on both sides of the continuous bending device adjacent to the material receiving rack. The strip-shaped chutes are horizontally arranged and located outside the continuous bending device. The outer ends of the two supporting rollers are respectively located on both sides of the continuous bending device and are respectively in sliding fit with the strip-shaped chutes. By providing a material receiving rack that can move to receive materials, as the bending diameter increases, the position of the coil is adaptively moved, thereby avoiding the bending springback of the pipeline, ensuring that the distance between the pipes in the flat coil remains unchanged, and further ensuring the effect of the coil.

Description

Technical Field

[0001] The present invention relates to coil pipe technology, and more particularly to a numerically controlled coil pipe machine for large-diameter Archimedean spiral lines. Background Art

[0002] Currently, the production method of Archimedean spiral coil pipes (common name: flat coil pipes) is to wind them using a fixed turntable. The adjustment of the spacing between each coil of pipes needs to be completed by padding tapes of different thicknesses. This method has two limitations: 1. Since there is no die restriction during the bending process of the pipes, when the inner diameter of the flat coil pipe is small, the pipe fittings are extremely prone to losing their circular shape. 2. It is difficult to produce flat coil pipes with a large pipe diameter or pitch. 3. Due to the influence of bending springback, as the diameter of the coiled circle increases, the spacing between the pipes becomes larger and larger, which greatly limits the outer diameter of the flat coil pipe and cannot ensure the uniformity of the spacing, and the correction difficulty is relatively large. Summary of the Invention

[0003] In view of the problems in the prior art, the present invention provides a numerically controlled coil pipe machine for large-diameter Archimedean spiral lines.

[0004] A numerically controlled coil pipe machine for large-diameter Archimedean spiral lines includes a continuous bending device and a material receiving rack. The material receiving rack includes a support frame. The continuous bending device is located on one side of the support frame and is close to the support frame. A sliding bracket is slidably arranged on the upper part of the support frame, and the sliding bracket is arranged to move back and forth along a horizontal straight line direction towards the continuous bending device. Horizontally arranged supporting rollers are circumferentially distributed around the middle of the sliding bracket. The inner ends of the supporting rollers are located in the middle of the sliding bracket, and the outer ends of the supporting rollers extend towards the outside of the sliding bracket. On the continuous bending device, strip-shaped chutes are arranged on both sides adjacent to the material receiving rack. The strip-shaped chutes are horizontally arranged and located outside the continuous bending device. The outer ends of the two supporting rollers are respectively located on both sides of the continuous bending device and are respectively in sliding fit with the strip-shaped chutes.

[0005] The working principle of the present invention: In the initial state, the sliding bracket is close to the continuous bending device, and at the same time, the outer ends of the supporting rollers arranged on the strip-shaped chutes are located at the outer end portions of the strip-shaped chutes. The continuous bending device continuously bends the pipeline in the form of a coil pipe, first forming the inner circle of the Archimedean spiral line and being located in the middle of the sliding bracket and supported on the supporting rollers. Then, the diameter of the Archimedean spiral line gradually increases, forming a flat coil pipe and rotating under the action of the supporting rollers. At the same time, the sliding bracket moves in a direction away from the continuous bending device, and the outer ends of the supporting rollers arranged on the strip-shaped chutes move towards the inner ends of the strip-shaped chutes, so that the supporting rollers can have a better supporting effect on the formed flat coil pipe. Among them, when the continuous bending device bends the pipeline, it continuously adjusts the bending radius of the pipeline, thereby completing the Archimedean spiral coil pipe.

[0006] Further: A rotary motor is fixedly installed inside the sliding bracket. The supporting rollers are divided into a first roller and a second roller. The first roller is a supporting roller connected to the strip-shaped chute, and the second roller is driven to rotate by the rotary motor. When the diameter and weight of the flat coiled pipe are large, the rotary motor drives the second roller to rotate, thereby driving the flat coiled pipe to rotate, so as to prevent bending and springback, and further ensure that the gaps between the inner pipes of the flat coiled pipe are the same.

[0007] Further: An upwardly disposed bevel gear is fixedly sleeved on the driving shaft of the rotary motor. A bevel gear is meshed with the bevel gear at a position corresponding to the second roller. The bevel gear is fixedly connected to the second roller and drives the second roller to rotate. The structure is simple, facilitating assembly, installation and maintenance.

[0008] Further: The strip-shaped chutes on both sides of the continuous bending device are arranged in parallel. The strip-shaped chutes are arranged perpendicular to the moving direction of the sliding bracket and are close to the receiving bracket. Such a design effectively avoids interference between the second roller and the continuous bending device.

[0009] Further: The continuous bending device includes bending rollers and two rows of transmission rollers. Each row of the transmission rollers is arranged along a horizontal straight line and is perpendicular to the sliding direction of the sliding bracket. A transmission gap is formed between the two rows of transmission rollers. The bending rollers are located at one end port of the transmission gap. The bending rollers are arranged to move along a direction parallel to the moving direction of the sliding bracket and are driven by a servo electric cylinder.

[0010] Further: One row of the transmission rollers is respectively fixed on the corresponding positioning seats, and the positioning seats are arranged to be adjustable in a straight-line position parallel to the moving direction of the sliding bracket.

[0011] The beneficial effects of the present invention: By providing a receiving rack that can move to receive materials, as the bending diameter increases, the position of the coiled pipe is adaptively moved, thereby avoiding bending and springback of the pipeline, ensuring that the distance between the pipes in the flat coiled pipe remains unchanged, and further ensuring the effect of the coiled pipe; by providing a supporting roller that can actively rotate, the large-radius and large-weight flat coiled pipe is rotated, avoiding the flat coiled pipe from generating resistance to the pipeline and affecting the bending radius of the pipeline; the bending roller is driven by a servo electric cylinder to move, so as to accurately control the bending radius of the pipeline, avoid out-of-roundness, and ensure the coiling effect of the flat coiled pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a top view structural schematic diagram of the present invention;

[0013] Figure 2 is Figure 1Schematic structural diagram of area A;

[0014] Figure 3 Schematic cross-sectional structure diagram of the present invention;

[0015] Figure 4 is Figure 3 Schematic A-A cross-sectional structure diagram;

[0016] Figure 5 Schematic top view structure diagram of the continuous bending device in the present invention.

[0017] In the figure, 1 is a flat coiled pipe; 21 is a sliding bracket; 22 is a first roller; 23 is a second roller; 24 is a strip-shaped chute; 25 is a rotating motor; 251 is a bevel gear; 252 is a bevel gear; 26 is a support frame; 261 is a slide rail; 31 is a drive box; 32 is a bending roller; 33 is a servo electric cylinder; 34 is a positioning seat; 35 is a transmission roller; 36 is a fixed seat; 37 is a drive motor; 371 is a speed reducer; 372 is a synchronous gear; 373 is a rotating shaft; 38 is a sliding seat. Detailed implementation manner

[0018] The present invention will be described in detail below with reference to the accompanying drawings. The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be construed as a limitation of the present invention. The orientation terms such as left, middle, right, up, and down in the examples of the present invention are only relative concepts to each other or are referenced based on the normal use state of the product, and should not be considered as restrictive.

[0019] A large-diameter Archimedes spiral numerical control coiling machine, as Figure 1 and Figure 2 shown, includes a continuous bending device and a material receiving rack. The material receiving rack includes a support frame 26. The continuous bending device is located on one side of the support frame 26 and is close to the support frame 26. A sliding bracket 21 is slidably arranged on the upper part of the support frame 26. The sliding bracket 21 is arranged to move back and forth along a horizontal straight line direction towards the continuous bending device. Horizontally arranged support rollers are circumferentially distributed around the middle of the sliding bracket 21. The inner ends of the support rollers are located in the middle of the sliding bracket 21, and the outer ends of the support rollers extend towards the outside of the sliding bracket 21. Strip-shaped chutes 24 are arranged on both sides of the continuous bending device adjacent to the material receiving rack. The strip-shaped chutes 24 are horizontally arranged and are located outside the continuous bending device. The outer ends of the two support rollers are respectively located on both sides of the continuous bending device and are respectively slidably engaged with the strip-shaped chutes.

[0020] Among them, in combination with Figure 3 as shown, a rotary motor 25 is fixedly installed in the sliding bracket 21. The supporting rollers are divided into a first roller 22 and a second roller 23. The first roller 22 is a supporting roller connected to the strip-shaped chute 24. The second roller 23 is driven to rotate by the rotary motor 25. The rotary motor 25 is fixedly installed in the middle of the sliding bracket 21 and is vertically arranged. An upwardly arranged bevel gear 251 is fixedly sleeved on the driving shaft of the rotary motor 25. A bevel gear 252 is meshed with the bevel gear 251 at a position corresponding to the second roller 23. The bevel gear 252 is fixedly connected to the second roller 23 and drives the second roller 23 to rotate. The four second rollers 23 are evenly distributed in a 180-degree circle. The rotary motor 25 drives the four second rollers 23 to rotate and adjusts the rotation speed in real time according to the diameter of the flat coiled pipe 1 to ensure that the linear speed of the flat coiled pipe 1 at the continuous bending device is the same. The height of the support frame 26 can be adjusted according to the flat coiled pipe 1 with different thicknesses.

[0021] In combination with Figure 4 and Figure 5 as shown, the strip-shaped chutes 24 on both sides of the continuous bending device are arranged in parallel. The strip-shaped chutes 24 are perpendicular to the moving direction of the sliding bracket 21 and are close to the material receiving bracket. The continuous bending device includes bending rollers 32 and two rows of transmission rollers 35. The bending rollers 32 and the transmission rollers 35 are both grooved rollers. Each row of the transmission rollers 35 is arranged along a horizontal straight line and is perpendicular to the sliding direction of the sliding bracket 21. A transmission gap is formed between the two rows of transmission rollers 35. The bending rollers 32 are located at one end port of the transmission gap. The bending rollers 32 are arranged to move along a direction parallel to the moving direction of the sliding bracket 21 and are driven by a servo electric cylinder 33. The bending rollers 32 are rotatably installed on a sliding seat 38. The sliding seat 38 is linked with the servo electric cylinder 33. The continuous bending device includes a driving box 31 and a fixed seat 36. The driving box 31 is fixedly connected to the fixed seat 36. The transmission rollers 35 are installed on the driving box 31. A driving motor 37 is fixedly arranged in the fixed seat 36. The driving motor 37 drives one row of the transmission rollers 35 through a speed reducer 371, a rotating shaft 373 and a synchronous gear 372. The other row of the transmission rollers 35 are respectively fixed on corresponding positioning seats 34. The positioning seats 34 are arranged with adjustable linear positions along a straight line parallel to the moving direction of the sliding bracket 21. The positioning seats 34 are slidably arranged on the driving box 31. A positioning pin is arranged on the driving box 31 at a position corresponding to the positioning seats 34. The inner end of the positioning pin is rotationally matched with the positioning seats 34. The middle part of the positioning pin is threadedly matched with the driving box 31.

[0022] Working principle of the present invention: In the initial state, the sliding bracket is close to the continuous bending device, and at the same time, the outer end of the supporting roller arranged on the strip-shaped chute is located at the outer end of the strip-shaped chute. The continuous bending device continuously bends the pipeline in the form of a coiled pipe, and the servo electric cylinder adjusts the position of the bending roller to control the bending radius of the pipeline in real time. First, the inner circle of the Archimedean spiral is formed and located in the middle of the sliding bracket and supported on the supporting roller. Then, the diameter of the Archimedean spiral gradually increases to form a flat coiled pipe, which rotates under the action of the supporting roller. At the same time, the sliding bracket moves away from the continuous bending device, and the outer end of the supporting roller arranged on the strip-shaped chute moves towards the inner end of the strip-shaped chute, so that the supporting roller can better support the formed flat coiled pipe. Among them, when the continuous bending device bends the pipeline, it continuously adjusts the bending radius of the pipeline, thereby completing the Archimedean spiral coiled pipe.

[0023] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description in the specification only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A numerically controlled coil winding machine for large-diameter Archimedean spiral, characterized in that: It includes a continuous bending device and a material receiving rack. The material receiving rack includes a support frame. The continuous bending device is located on one side of the support frame and is close to the support frame. A sliding bracket is slidably arranged on the upper part of the support frame. The sliding bracket is arranged to move back and forth along a horizontal straight line direction towards the continuous bending device. Horizontally arranged supporting rollers are circumferentially distributed around the middle of the sliding bracket. The inner ends of the supporting rollers are located in the middle of the sliding bracket, and the outer ends of the supporting rollers extend towards the outside of the sliding bracket; On both sides of the continuous bending device adjacent to the material receiving rack, strip-shaped chutes are provided. The strip-shaped chutes are horizontally arranged and located outside the continuous bending device. The outer ends of the two supporting rollers are respectively located on both sides of the continuous bending device and are respectively in sliding cooperation with the strip-shaped chutes; In the initial state, the sliding bracket is close to the continuous bending device. When the diameter of the Archimedean spiral gradually increases, a flat coil is formed and rotates under the action of the supporting rollers. At the same time, the sliding bracket moves in a direction away from the continuous bending device, and the outer ends of the supporting rollers arranged on the strip-shaped chutes move towards the inner ends of the strip-shaped chutes; A rotating motor is fixedly installed in the sliding bracket. The supporting rollers are divided into a first roller and a second roller. The first roller is connected to the strip-shaped chute, and the second roller is driven to rotate by the rotating motor; An upwardly arranged bevel gear is fixedly sleeved on the driving shaft of the rotating motor. A bevel gear is meshed with the bevel gear at a position corresponding to the second roller on the bevel gear. The bevel gear is fixedly connected to the second roller and drives the second roller to rotate; The strip-shaped chutes on both sides of the continuous bending device are arranged in parallel. The strip-shaped chutes are arranged perpendicular to the moving direction of the sliding bracket and are close to the material receiving rack.

2. A numerically controlled coil winding machine for large-diameter Archimedean spiral according to claim 1, characterized in that: The continuous bending device includes bending rollers and two rows of transmission rollers. Each row of transmission rollers is arranged along a horizontal straight line and is arranged perpendicular to the sliding direction of the sliding bracket. A transmission gap is formed between the two rows of transmission rollers. The bending rollers are located at one end port of the transmission gap. The bending rollers are arranged to move along a direction parallel to the moving direction of the sliding bracket and are driven by a servo electric cylinder.

3. A numerically controlled coil winding machine for large-diameter Archimedean spiral according to claim 2, characterized in that: One row of the transmission rollers is respectively fixed on the corresponding positioning seats, and the positioning seats are arranged to be adjustable in a straight-line position parallel to the moving direction of the sliding bracket.

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