Machining process method of super-flexible pipe

Abstract

The invention relates to the technical field of natural gas corrugated pipes, and discloses a machining process method of a super-flexible pipe, which comprises the following steps: S1, placing a super-flexible pipe machining blank on a machining machine tool, and performing spinning machining by using a first cutter to form a first U-shaped trough; s2, a second cutter is used for spinning machining, and the first U-shaped trough is machined into a second U-shaped trough; s3, a third cutter is used for spinning machining, and the second U-shaped wave trough is machined into a third U-shaped wave trough; s4, a fourth cutter is used for spinning machining, and the third U-shaped trough is machined into a fourth U-shaped trough; s5, a fifth cutter is used for spinning machining, and a first inverted omega-shaped trough is machined from the fourth U-shaped trough; and S6, a sixth cutter is used for conducting spinning machining, and the first inverted-omega-shaped wave trough is machined to form final omega-shaped corrugations. The corrugated pipe is slowly machined and formed through multiple steps, the flexibility of the corrugated pipe can be improved, the corrugated pipe has a compression space due to the omega-shaped corrugations, and the phenomenon that the corrugated pipe is shortened due to collision or falling can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of natural gas bellows, and in particular to a processing method for an ultra-flexible tube. Background Art

[0002] There are many methods for processing super-flexible tubes. Currently, most of them on the market are H-shaped tubes in the front section and dense waves in the back section. The super-flexible tubes produced by this method are theoretically unstable in length direction. In fact, they cannot be collided or dropped during the processing, otherwise the super-flexible tubes will be shortened and affect normal use. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the existing ultra-flexible tubes are unstable in length direction during processing and are easily shortened after collision or falling.

[0004] In order to solve the above technical problems, the technical solution of the present invention is to provide a processing method for an ultra-flexible tube, which is made by a spinning process and comprises the following steps:

[0005] S1. Place the ultra-flexible tube blank on a processing machine, and use a No. 1 tool to perform spinning processing to form a top arc-shaped wave crest, and form a first U-shaped wave valley between two wave crests;

[0006] S2, replacing the tool, using tool No. 2 to perform spinning processing, processing the first U-shaped trough in step S1 into a second U-shaped trough with a depth greater than the first U-shaped trough and a width less than the first U-shaped trough;

[0007] S3, replacing the tool, using tool No. 3 to perform spinning processing, processing the second U-shaped trough in step S2 into a third U-shaped trough with a depth greater than the second U-shaped trough and a width less than the second U-shaped trough;

[0008] S4, replacing the tool, using tool No. 4 to perform spinning processing, processing the third U-shaped trough in step S3 into a fourth U-shaped trough with a width smaller than the third U-shaped trough;

[0009] S5, replacing the tool, using tool No. 5 to perform spinning processing, processing the fourth U-shaped trough in step S4 into a first inverted Ω-shaped trough with a width smaller than the fourth U-shaped trough;

[0010] S6, replace the tool and use tool No. 6 for spinning processing to process the first inverted Ω-shaped trough in step S5 into a second inverted Ω-shaped trough with a depth greater than the first inverted Ω-shaped trough and a width less than the first inverted Ω-shaped trough, finally forming an Ω-shaped corrugation.

[0011] Optionally, arc transitions are provided on both sides of the bottoms of the first U-shaped trough, the second U-shaped trough, the third U-shaped trough, the fourth U-shaped trough and the first inverted Ω-shaped trough.

[0012] Optionally, both sides of the third U-shaped trough, the fourth U-shaped trough and the first inverted Ω-shaped trough are inclined outward to form an acute angle, and the third U-shaped trough, the fourth U-shaped trough and the first inverted Ω-shaped trough have the same depth.

[0013] Optionally, when the crests and troughs are formed in steps S1-S6, the axes of the troughs are offset to the same side, but the overall line length remains unchanged.

[0014] In summary, the process method of the present invention slowly forms inverted Ω-shaped corrugations through multiple steps. Multi-step forming can increase the flexibility of the bellows, and the Ω-shaped corrugations give the bellows a compression space, which can reduce the shortening of the bellows caused by collision or falling, and increase the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the forming process in S1 and S2 in the embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the forming process in S3 and S4 in an embodiment of the present invention;

[0017] Figure 3 It is a schematic diagram of the forming in S5 and S6 in the embodiment of the present invention. DETAILED DESCRIPTION

[0018] The following combination Figure 1-3 The present invention is described in further detail.

[0019] The present invention discloses a processing method for an ultra-flexible tube, which is made by a spinning process and comprises the following steps:

[0020] S1. Place the ultra-flexible tube blank on a processing machine, and use a No. 1 tool to perform spinning processing to form a top arc-shaped wave crest, and form a first U-shaped wave valley between two wave crests, and arc transitions are provided on both sides of the bottom of the first U-shaped wave valley;

[0021] Specifically, the depth of the first U-shaped trough is 1.55±0.1 cm, the width is 3.20±0.1 cm, the distance between the peaks on both sides of each first U-shaped trough is 5.00±0.1 cm, and the arc radius of the bottom of the first U-shaped trough is 10.00±0.1 cm;

[0022] S2, replace the tool, use tool No. 2 to perform spinning processing, and process the first U-shaped trough in step S1 into a second U-shaped trough with a depth greater than the first U-shaped trough and a width less than the first U-shaped trough, and arc transitions are provided on both sides of the bottom of the second U-shaped trough;

[0023] Specifically, the depth of the second U-shaped trough is 2.09±0.1 cm, the width is 2.44±0.1 cm, the distance between the peaks on both sides of each second U-shaped trough is 4.36±0.1 cm, the arc radius of the bottom of the second U-shaped trough is 1.50±0.1 cm, and the midline of the second U-shaped trough is offset to the right by 0.64±0.1 cm compared with the first U-shaped trough;

[0024] S3, replace the tool, use tool No. 3 to perform spinning processing, and process the second U-shaped trough in step S2 into a third U-shaped trough with a depth greater than the second U-shaped trough and a width less than the second U-shaped trough, and arc transitions are provided on both sides of the bottom of the third U-shaped trough, and both sides of the third U-shaped trough are inclined outward to form an acute angle;

[0025] Specifically, the depth of the third U-shaped trough is 2.48±0.1 cm, the width is 1.94±0.1 cm, the distance between the peaks on both sides of each third U-shaped trough is 3.86±0.1 cm, the arc radius of the bottom of the third U-shaped trough is 0.60±0.1 cm, the midline of the third U-shaped trough is offset to the right by 0.50±0.1 cm compared to the second U-shaped trough, and the two sides of the third U-shaped trough are inclined outward at an angle of 63±1 degrees;

[0026] S4, replace the tool, use tool No. 4 to perform spinning processing, and process the third U-shaped trough in step S3 into a fourth U-shaped trough with a width smaller than the third U-shaped trough, and arc transitions are provided on both sides of the bottom of the fourth U-shaped trough, and both sides of the fourth U-shaped trough are inclined outward to form an acute angle;

[0027] Specifically, the depth of the fourth U-shaped trough is 2.48±0.1 cm, the width is 1.60±0.1 cm, the distance between the peaks on both sides of each fourth U-shaped trough is 3.30±0.1 cm, the arc radius of the bottom of the fourth U-shaped trough is 0.60±0.1 cm, the midline of the fourth U-shaped trough is offset to the right by 0.56±0.1 cm compared to the third U-shaped trough, and the two sides of the fourth U-shaped trough are inclined outward at an angle of 43±1 degrees;

[0028] S5, replace the tool, use tool No. 5 to perform spinning processing, process the fourth U-shaped trough in step S4 into a first inverted Ω-shaped trough with a width smaller than the fourth U-shaped trough, and arc transitions are arranged on both sides of the bottom of the first inverted Ω-shaped trough, and both sides of the first inverted Ω-shaped trough are inclined outward to form an acute angle;

[0029] Specifically, the depth of the first inverted Ω-shaped trough is 2.48±0.1cm, the width is 1.16±0.1cm, the distance between the peaks on both sides of each first inverted Ω-shaped trough is 2.66±0.1cm, the arc radius of the bottom of the first inverted Ω-shaped trough is 0.60±0.1cm, the midline of the first inverted Ω-shaped trough is offset to the right by 0.66±0.1cm compared to the fourth U-shaped trough, and the two sides of the first inverted Ω-shaped trough are inclined outward at an angle of 23±1 degrees;

[0030] S6, replacing the tool, using tool No. 6 to perform spinning processing, processing the first inverted Ω-shaped trough in step S5 into a second inverted Ω-shaped trough with a depth greater than the first inverted Ω-shaped trough and a width less than the first inverted Ω-shaped trough, and finally forming an Ω-shaped corrugation;

[0031] Specifically, the depth of the second inverted Ω-shaped trough is 2.50±0.1cm, the width is 0.60±0.1cm, the distance between the peaks on both sides of each second inverted Ω-shaped trough is 2.10±0.1cm, the arc radius of the bottom of the second inverted Ω-shaped trough is 0.60±0.1cm, and the midline of the second inverted Ω-shaped trough is offset to the right by 0.56±0.1cm compared to the first inverted Ω-shaped trough.

[0032] In a further embodiment, arc transitions are provided on both sides of the bottom of the first U-shaped trough, the second U-shaped trough, the third U-shaped trough, the fourth U-shaped trough and the first inverted Ω-shaped trough, and the two side edges of the third U-shaped trough, the fourth U-shaped trough and the first inverted Ω-shaped trough are inclined outward to form acute angles, and the third U-shaped trough, the fourth U-shaped trough and the first inverted Ω-shaped trough have the same depth, and when the peaks and troughs are formed in steps S1-S6, the axes of the troughs are offset to the same side, but the overall line length remains unchanged.

[0033] During the specific operation, the number of cutters can be adjusted according to the required depth and width of the corrugation, so that the workpiece gradually forms the required corrugated shape.

[0034] Example

[0035] The processing method of the ultra-flexible tube of this embodiment is made by a spinning process, and includes the following steps:

[0036] S1. Reference Figure 1 , placing the ultra-flexible tube blank on the processing machine, using a No. 1 tool for spinning processing to form a top arc-shaped peak, and forming a first U-shaped trough between two peaks, the depth of the first U-shaped trough is 1.55 cm, the width is 3.20 cm, the distance between two adjacent peaks is 5.00 cm, and the arc radius of the bottom of the first U-shaped trough is 10.00 cm;

[0037] S2. Replace the tool and use tool No. 2 to spin the first U-shaped trough into a second U-shaped trough. The depth of the second U-shaped trough is 2.09 cm, the width is 2.44 cm, the distance between two adjacent wave peaks is 4.36 cm, the arc radius of the bottom of the second U-shaped trough is 1.50 cm, and the center line of the second U-shaped trough is offset to the right by 0.6421 cm compared with the first U-shaped trough, and the total length remains unchanged.

[0038] S3. Reference Figure 2, replace the tool, use tool No. 3 to spin the second U-shaped trough into the third U-shaped trough, the depth of the third U-shaped trough is 2.48cm, the width is 1.94cm, the distance between two adjacent peaks is 3.86cm, the arc radius of the bottom of the third U-shaped trough is 0.60cm, the center line of the third U-shaped trough is offset to the right by 0.50±0.1cm compared with the second U-shaped trough, the total length remains unchanged, and the two sides of the third U-shaped trough are inclined outward at an angle of 63 degrees;

[0039] S4, replace the tool, use tool No. 4 to spin the third U-shaped trough into a fourth U-shaped trough, the depth of the fourth U-shaped trough is 2.48 cm, the width is 1.60 cm, the distance between two adjacent crests is 3.30 cm, the arc radius of the bottom of the fourth U-shaped trough is 0.60 cm, the center line of the fourth U-shaped trough is offset to the right by 0.5593 cm compared with the third U-shaped trough, the total length remains unchanged, and the two sides of the fourth U-shaped trough are inclined outward at an angle of 43 degrees;

[0040] S5. Reference Figure 3 , replace the tool, use tool No. 5 to spin the fourth U-shaped trough into the first inverted Ω-shaped trough, the depth of the first inverted Ω-shaped trough is 2.48 cm, the width is 1.16 cm, the distance between the peaks on both sides of each first inverted Ω-shaped trough is 2.66 cm, the arc radius of the bottom of the first inverted Ω-shaped trough is 0.60 cm, the center line of the first inverted Ω-shaped trough is offset to the right by 0.60 cm compared with the fourth U-shaped trough, the total length remains unchanged, and the two sides of the first inverted Ω-shaped trough are inclined outward at an angle of 23 degrees;

[0041] S6. Replace the tool and use tool No. 6 to spin the first inverted Ω-shaped trough into a second inverted Ω-shaped trough. The depth of the second inverted Ω-shaped trough is 2.50 cm, the width is 0.60 cm, the distance between the peaks on both sides of each second inverted Ω-shaped trough is 2.10 cm, the arc radius of the bottom of the second inverted Ω-shaped trough is 0.60 cm, and the center line of the second inverted Ω-shaped trough is offset to the right by 0.60 cm compared to the first inverted Ω-shaped trough. The total length remains unchanged, and finally an Ω-shaped corrugation is formed.

[0042] The present invention slowly forms an inverted Ω-shaped corrugation on a bellows through spinning in multiple steps. The multi-step forming can increase the flexibility of the bellows, and the Ω-shaped corrugation allows the bellows to have a compression space, which can reduce the shortening of the bellows caused by collision or falling, and increase the product qualification rate.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A processing method for an ultra-flexible tube, characterized in that: Made by spinning process, including the following steps: S1. Place the ultra-flexible tube blank on a processing machine, and use a No. 1 tool to perform spinning processing to form a top arc-shaped wave crest, and form a first U-shaped wave valley between two wave crests; S2, replacing the tool, using tool No. 2 to perform spinning processing, processing the first U-shaped trough in step S1 into a second U-shaped trough with a depth greater than the first U-shaped trough and a width less than the first U-shaped trough; S3, replacing the tool, using tool No. 3 to perform spinning processing, processing the second U-shaped trough in step S2 into a third U-shaped trough with a depth greater than the second U-shaped trough and a width less than the second U-shaped trough; S4, replacing the tool, using tool No. 4 to perform spinning processing, processing the third U-shaped trough in step S3 into a fourth U-shaped trough with a width smaller than the third U-shaped trough; S5, replacing the tool, using tool No. 5 to perform spinning processing, processing the fourth U-shaped trough in step S4 into a first inverted Ω-shaped trough with a width smaller than the fourth U-shaped trough; S6, replace the tool and use tool No. 6 for spinning processing to process the first inverted Ω-shaped trough in step S5 into a second inverted Ω-shaped trough with a depth greater than the first inverted Ω-shaped trough and a width less than the first inverted Ω-shaped trough, finally forming an Ω-shaped corrugation.

2. The processing method of the ultra-flexible tube according to claim 1, characterized in that: Arc transitions are arranged on both sides of the bottoms of the first U-shaped trough, the second U-shaped trough, the third U-shaped trough, the fourth U-shaped trough and the first inverted Ω-shaped trough.

3. The processing method of the ultra-flexible tube according to claim 2, characterized in that: Both sides of the third U-shaped trough, the fourth U-shaped trough and the first inverted Ω-shaped trough are inclined outward to form an acute angle, and the third U-shaped trough, the fourth U-shaped trough and the first inverted Ω-shaped trough have the same depth.

4. The processing method of the ultra-flexible tube according to claim 1, characterized in that: When the wave crests and wave troughs are formed in the steps S1-S6, the axis of the wave troughs is offset to the same side, but the overall line length remains unchanged.

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