Efficient polishing-free automatic pipe making machine and pipe making method

Abstract

The invention discloses an efficient polishing-free automatic pipe making machine and a pipe making method. The pipe making machine comprises a steel belt unwinding device, a steel belt flattening device, a steel belt edge folding device, a steel belt folding device, a folding and welding device, a steel pipe shaping device and a shaping sizing device which are arranged in sequence. The steel beltedge folding device presses the edges of two sides of a flattened steel belt into right-angled secondary bent edges, the steel belt folding device presses the steel belt to enable two side edges of the steel belt to be gradually bent upward and then folded, and the edges of two sides of the steel belt of the folding and welding device are welded to form a steel pipe. According to a pipe manufacturing process, the two edges of the steel belt are gradually pressed into the groove shape, then the steel belt is folded, the edges on two sides are located in the groove body after being folded, andduring use, a weld joint can be shielded in the groove, so that the using appearance is not affected. Therefore, it is not needed to polish the weld joint, and the production efficiency can be greatlyimproved and the problems caused by weld joint grinding are solved. The surface of a tubular product is free of weld joints and polishing traces, the surface state can be smooth easily, and the product quality is improved.

Description

technical field

[0001] The invention relates to the field of special-shaped pipe production and processing, in particular to a high-efficiency grinding-free automatic pipe making machine and a pipe making method. Background technique

[0002] When making traditional stainless steel grooved pipes, it is generally used to make grooves in the center of the steel strip first, then curl the steel strips, and make grooved steel pipes after welding. The weld seam of this kind of pipe is on the outer surface of the pipe body , the weld seam is uneven and the color is different from the original steel, so the weld seam must be ground off and then polished. However, the pipe welding process is accompanied by many uncertain factors. The weld seam is uneven, and some places cannot be polished during grinding. Therefore, there are obvious unevenness and obvious grinding marks in some parts, which greatly affect the quality of the product. Therefore, it is necessary to carry out two sand...

Examples

Embodiment 1

[0034] Figure 1-12 A high-efficiency grinding-free automatic pipe making machine according to an embodiment of the present invention is schematically shown.

[0035] refer to Figure 1-12 The high-efficiency grinding-free automatic pipe making machine includes a steel strip unwinding device 1, a steel strip flattening device 2, a steel strip folding device 3, a steel strip closing device 4, a closing welding device 5, and a weld seam flattening device 8 arranged in sequence , Steel pipe shaping device 6, shaping and sizing device 7 and power transmission device 9. The steel strip unwinding device 1 is used to install the steel strip coil and unwind the steel strip coil. The unwinding coil is flattened by the steel strip flattening device 2 and then transported to the steel strip hemming device 3 . The steel strip hemming device 3 gradually presses the two side edges of the flattened steel strip into right-angled secondary bending edges, and the steel strip closing device 4 ...

Embodiment 2

[0058] This embodiment provides a high-efficiency grinding-free automatic tube-making method suitable for the high-efficiency grinding-free automatic tube-making machine of Embodiment 1, including the following steps:

[0059]S1, the steel strip unwinding device 1 unwinds the steel strip, and the unrolled steel strip enters between the two horizontal rollers of the steel strip flattening device 2 for flattening;

[0060] S2. The flattened steel strip is pressed into a right-angled secondary hemming by the steel strip hemming device 3 on both sides of the steel strip; the secondary hemming has two 90-degree bending angles and two pieces are connected and basically A plane bent at 90 degrees. The secondary fold is first bent 90 degrees upward from the center outward, and then bent outward 90 degrees horizontally.

[0061] S3, the horizontal roller press 41 of the steel strip closing device 4 presses the middle part of the steel strip so that the middle part of the steel strip i...

technical field

[0001] The invention relates to the field of special-shaped pipe production and processing, in particular to a high-efficiency grinding-free automatic pipe making machine and a pipe making method. Background technique

[0002] When making traditional stainless steel grooved pipes, it is generally used to make grooves in the center of the steel strip first, then curl the steel strips, and make grooved steel pipes after welding. The weld seam of this kind of pipe is on the outer surface of the pipe body , the weld seam is uneven and the color is different from the original steel, so the weld seam must be ground off and then polished. However, the pipe welding process is accompanied by many uncertain factors. The weld seam is uneven, and some places cannot be polished during grinding. Therefore, there are obvious unevenness and obvious grinding marks in some parts, which greatly affect the quality of the product. Therefore, it is necessary to carry out two sand...

Examples

Embodiment 1

[0034] Figure 1-12 A high-efficiency grinding-free automatic pipe making machine according to an embodiment of the present invention is schematically shown.

[0035] refer to Figure 1-12 The high-efficiency grinding-free automatic pipe making machine includes a steel strip unwinding device 1, a steel strip flattening device 2, a steel strip folding device 3, a steel strip closing device 4, a closing welding device 5, and a weld seam flattening device 8 arranged in sequence , Steel pipe shaping device 6, shaping and sizing device 7 and power transmission device 9. The steel strip unwinding device 1 is used to install the steel strip coil and unwind the steel strip coil. The unwinding coil is flattened by the steel strip flattening device 2 and then transported to the steel strip hemming device 3 . The steel strip hemming device 3 gradually presses the two side edges of the flattened steel strip into right-angled secondary bending edges, and the steel strip closing device 4 ...

Embodiment 2

[0058] This embodiment provides a high-efficiency grinding-free automatic tube-making method suitable for the high-efficiency grinding-free automatic tube-making machine of Embodiment 1, including the following steps:

[0059]S1, the steel strip unwinding device 1 unwinds the steel strip, and the unrolled steel strip enters between the two horizontal rollers of the steel strip flattening device 2 for flattening;

[0060] S2. The flattened steel strip is pressed into a right-angled secondary hemming by the steel strip hemming device 3 on both sides of the steel strip; the secondary hemming has two 90-degree bending angles and two pieces are connected and basically A plane bent at 90 degrees. The secondary fold is first bent 90 degrees upward from the center outward, and then bent outward 90 degrees horizontally.

[0061] S3, the horizontal roller press 41 of the steel strip closing device 4 presses the middle part of the steel strip so that the middle part of the steel strip i...

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