CN1392004A - Hollow tube forming device - Google Patents

Abstract

The hollow tube forming device comprises a transmission mechanism, a welding mechanism and a feeding mechanism. The transmission mechanism is a cylindrical inner mold assembled at the output end of the transmission machine. The outer diameter of the inner mold is the inner diameter of the tube to be made. The welding mechanism is provided with a welding gun. The feeding mechanism supports a metal strip. After the metal strip is discharged, it is connected to the inner mold of the transmission mechanism through a leveling fixed frame. The transmission machine is started to rotate the inner mold, and the metal strip is wound into a circular tube shape, and the edges of the metal strip are adjacent to each other. The welding gun is used to perform welding operations on the adjacent parts of the metal strip to obtain a hollow tube body. The tube body has better strength and is not easy to deform. The tube body can increase the liquid flow rate when conveying water.

Description

Hollow tube forming device

The invention relates to pipe fitting forming equipment, in particular to a hollow pipe forming device.

Referring to Figures 1 and 2, the hollow pipe body 10 (i.e., a pipe with seams) generally made by welding (or welding) is mainly made by extruding the metal plate 11 through the roll of the rolling machine, so that The flat metal sheet 11 is formed into a circular tube, and then the two adjacent ends of the rolled metal sheet 11 are welded to form a complete hollow tube 10 . However, the hollow pipe body 10 made in the above-mentioned manner has a welded bead 12 in a straight line, and in terms of the overall hollow pipe body 10, the weld bead 12 is a place with weak stress, so the hollow pipe The body 10 is easily deformed by the weld, especially when a longer hollow tube body 10 is made, the deformation is more likely to occur. Furthermore, when the hollow tube body 10 is used as a liquid delivery tube, the tube body can allow liquid to flow in the tube, but the flow speed cannot be increased.

The purpose of the present invention is to improve the various problems and shortcomings of the above-mentioned conventional hollow pipes formed by welding, and to create a method of spirally welding metal plates to form a hollow pipe, so that the pipe The hollow tube forming device has better strength and is not easily deformed, and can increase the flow rate of the liquid when the tube transports water.

The purpose of the present invention is achieved by the following technical solutions.

The hollow pipe forming device of the present invention includes a transmission mechanism, a welding mechanism and a feeding mechanism. The transmission mechanism is to assemble a cylindrical inner mold at the output end of a transmission machine, and the outer diameter of the inner mold is The inner diameter of the pipe body to be made; the welding mechanism, which is a general welding machine, is provided with a welding gun; the feeding mechanism, on which a metal strip is placed, makes the metal strip pass through a The leveling fixing frame is connected to the inner mold of the transmission mechanism, so that the leveling fixing frame has a pulling and leveling effect on the metal material belt, and when the metal material belt is connected to the inner mold, there is an angle between the inner mold and the inner mold; The metal strip of the feeding mechanism can be connected to the inner mold of the transmission mechanism at an appropriate angle, and the transmission mechanism is started to rotate the inner mold, and the metal strip is wound into a circular tube shape, and the edges of the metal strip are adjacent to each other , and use the welding gun of the welding mechanism to perform welding work on the adjacent part of the metal strip, thereby forming a hollow pipe body.

The above object of the present invention can also be further achieved through the following technical measures.

The internal mold of the transmission mechanism of the present invention is provided with a spiral concave groove; the material belt of the feeding mechanism is a metal with better ductility, and one side edge of the material belt is bent downward for a hem; when the material belt After the material is discharged, it is connected to the inner mold of the transmission mechanism, so that the folded edge corresponds to the groove of the inner mold, and when the material strip is wound and welded to form a hollow pipe body, a spiral folded edge is extended under the weld bead; The front end of the inner mold of the transmission mechanism is provided with a guide angle with an appropriate slope, so that the welded pipe body can be separated from the inner mold.

The specific structure of the present invention is given in detail by the following examples and accompanying drawings.

Fig. 1 is a schematic diagram of conventional roll forming of a hollow tubular body.

Fig. 2 is a schematic diagram of a three-dimensional structure of a conventional hollow tube.

Fig. 3 is a schematic diagram of forming a hollow tube body of the present invention.

Fig. 4 is a schematic diagram of the three-dimensional structure of the hollow tube body of the present invention.

Fig. 5 is a schematic diagram of another embodiment of the present invention.

Fig. 6 is an I-I sectional view shown in Fig. 5 .

Fig. 7 is a schematic diagram of the three-dimensional structure of another hollow tube body of the present invention.

Referring to Fig. 3, the present invention mainly includes a transmission mechanism 20, a welding mechanism 30 and a feeding mechanism 40; wherein:

Transmission mechanism 20 (shown in Figure 3), it is to assemble a cylindrical inner mold 23 at the output end 22 of a transmission machine 21, and the outer diameter of this inner mold 23 is the inner diameter that desires to make the pipe body, and this inner mold 23 It can be of different specifications, and can be replaced and assembled on the output end 22 of the transmission machine 21. The front end of the inner mold 23 is provided with a guide angle 24 with a suitable slope.

The welding mechanism 30 (shown in FIG. 3 ), which is a commonly used welding machine, is provided with a welding gun 31 .

Feeding mechanism 40 (shown in Fig. 3 ) bears metal strip 41 on it, and after metal strip 41 is discharged, it is connected to the inner mold 23 of transmission mechanism 20 through a leveling fixture 42, The leveling fixture 42 has a pulling and leveling effect on the metal strip 41. When the metal strip 41 is connected to the inner mold 23, it has an angle with the inner mold 23, and the angle is preferably 45 degrees. .

By means of the above-mentioned components (see Fig. 4), the metal strip 41 of the feeding mechanism 40 can be connected to the inner mold 23 of the transmission mechanism 20 through the leveling fixture 42, and then the transmission machine 21 is started to make the inner mold 23 Rotate, and the metal strip 41 is wound into a circular tube shape, so that the side ends of the metal strip 41 are adjacent to each other, and the welding operation is performed on the adjacent part of the metal strip 41 with the welding gun 31 of the welding mechanism 30, and the The coiled metal strip 41 is melted into a hollow tube body 50 . The weld bead 51 of the hollow pipe body 50 is in a spiral shape. After the hollow pipe body 50 is welded and formed, it can be pulled away from the inner mold 23 by the discharge pulling mechanism to cooperate with the rotation speed of the transmission machine 21 (the discharge pull mechanism 50 can be pulled away from the inner mold 23 (the discharge pull mechanism) The material pulling mechanism is not the focus of the present invention, so it will not be described in detail here), and then the hollow tube body 50 can be cut and other processing procedures, and then the required tube body can be obtained.

Again (please refer to Fig. 5, shown in Fig. 6), on the inner mold 23 of above-mentioned transmission mechanism 20, can be provided with the spiral groove 25 of appropriate depth, and the metal strip 41 of feeding mechanism 40 can be better in ductility Metal, one side edge of which can be bent downwards to form a folded edge 43, which can be formed by rolling or stamping.

Please refer to shown in Figure 7, when the metal strip 41 with the hem 43 is connected to the inner mold 23 of the transmission mechanism 20 through the leveling fixture 42, the hem 43 is made to correspond to the concave of the inner mold 23 of the transmission mechanism 20. ditch 25, start the drive 21 to rotate the inner mold 23, and wind the metal material strip 41 to form a hollow pipe body 60. The welding bead 61 of the hollow pipe body 60 is in a spiral shape, and the flange 43 extends along the welding bead 61 to spirally extend inwards, thereby forming a reinforcing fin effect on the hollow tube body 60 . In addition to making the stress of the hollow tube body 60 average, increasing the strength of the hollow tube body 60 and reducing its deformation, the hem 43 forms a helical rib in the hollow tube body 60, and the hollow When the pipe body 60 is used as a liquid delivery pipe, the folded edge 43 in the pipe forms a helical water channel, so that the liquid flows in a spiral manner when being conveyed in the pipe, thereby increasing the flow rate of the liquid in the pipe. Although the metal strip 41 is roughly L-shaped, it will produce resistance when it is rotated by the inner mold 23. However, since the metal strip 41 is a metal with good ductility, and the high temperature produced by the welding operation can change The metal molecules make it easy to be rolled and formed without deformation. The metal strip 41 in this embodiment is a titanium metal strip.

It can be seen from the various embodiments described above and shown in the accompanying drawings that the present invention welds metal sheets in a spiral manner to form a hollow pipe body, so that the pipe body has better strength and is not easily deformed, and when the pipe body The liquid flow rate can be increased when transporting water and liquid. Compared with the commonly used similar devices and their products, the present invention has remarkable industrial applicability, and the inventive means it uses are indeed researched by the present inventor, which has novelty , outstanding creativity and practicability, and meet the requirements of invention patents, so the application is filed according to law.

Claims (3)

1, a kind of hollow tube shaped device is characterized in that, includes transmission mechanism, welding mechanism and feeding mechanism; Described transmission mechanism, it is the output winding one cylindric internal mold in a driver, the external diameter of this internal mold is an internal diameter of desiring to make body; Described welding mechanism, it is general heat sealing machine, which is provided with a jointing gun; Described feeding mechanism, bearing has metal material belt on it, makes the metal material belt discharging after a leveling fixed mount and being attached on the internal mold of transmission mechanism has an angle between system and the internal mold when this metal material belt is attached to internal mold; Can be attached to the metal material belt of feeding mechanism on the internal mold of transmission mechanism with suitable angle, starting driver rotates internal mold, and it is cylindrical that metal material belt is reeled, and the limit end of metal material belt is adjoined each other, and the adjoiner of metal material belt imposing weld job with the jointing gun of welding mechanism, group constitutes a hollow tube whereby.

2, hollow tube shaped device according to claim 1 is characterized in that, the internal mold of described transmission mechanism is provided with the helical form chase; The strip of described feeding mechanism is the preferable metal of ductility, and a lateral margin of strip is bending one flanging downwards; When being attached on the internal mold of transmission mechanism after the strip discharging, make the chase of flanging corresponding to internal mold, when making the welding of strip coiling make hollow tube, a helical form flanging is extended in its welding bead below.

3, hollow tube shaped device according to claim 1, the internal mold front end of described transmission mechanism is provided with the lead angle of a suitable gradient.

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