CN111922116A

CN111922116A - Thick-wall corrugated pipe roll forming process

Info

Publication number: CN111922116A
Application number: CN202010607053.5A
Authority: CN
Inventors: 张逊; 陈磊; 刘旭
Original assignee: Jiangsu Xintai Chemical Equipment Co ltd
Current assignee: Jiangsu Xintai Chemical Equipment Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-11-13

Abstract

The invention relates to a thick-wall corrugated pipe roll forming process which comprises preparation work, blanking, rough forming, welding, flaw detection, forming and heat treatment. The invention has simple process and reasonable design, adopts the rolling forming method under the condition of not influencing the performance of the thick-wall corrugated pipe, effectively replaces the traditional hydraulic forming method, saves the investment of hydraulic equipment, and simultaneously can greatly reduce the die sinking cost of the corrugated pipe die of the traditional processing method.

Description

Thick-wall corrugated pipe roll forming process

Technical Field

The invention relates to a roll forming process of a thick-wall corrugated pipe, and belongs to the technical field of forming of thick-wall corrugated pipes.

Background

For the thick wall bellows that the wall thickness is 10 ~ 40mm under the general condition, traditional processing method is ten thousand tons of press hydraulic forming, and the enterprise need purchase more expensive hydraulic equipment, has improved the manufacturing cost of enterprise in the intangible, and the product of producing moreover can not be fine satisfies current needs.

Disclosure of Invention

The invention aims to: the rolling forming process of the thick-wall corrugated pipe is used for forming and manufacturing the thick-wall corrugated pipe with the wall thickness of 10-40 mm, and production cost of an enterprise is reduced to the maximum extent on the premise of ensuring product quality.

The technical scheme adopted by the invention is as follows: a thick-wall corrugated pipe roll forming process comprises the following steps:

step one, preparation work: preparing a carbon steel or austenitic stainless steel plate with certain thickness and length according to actual needs, and simultaneously ensuring the flatness of the plate without surface pits;

step two, blanking: calculating the blanking size according to the specification of the thick-wall corrugated pipe, blanking by using a numerical control plasma cutting machine, and presetting a plate welding groove according to the requirements of process files after blanking is finished;

step three, coarse molding: after blanking is finished, a plate is placed in a rough forming device, prepressing is carried out through an auxiliary forming mechanism on the rough forming device, meanwhile, a motor drives a lower rough forming die to rotate clockwise, an upper rough forming die is driven, and a 150mm straight edge is reserved at the butt joint end of a pipe blank in the rough forming process and is not rolled;

step four, welding and flaw detection: after rough forming, welding longitudinal welding seams of the tube blank according to a welding process, performing radiographic inspection after welding is finished, and performing forming treatment after the radiographic inspection is qualified;

step five, forming: placing the plate on a forming device, adjusting the distance between an upper forming die and a lower forming die and the plate, driving a lower forming die to rotate by a motor when the upper forming die and the lower forming die are inosculated with the plate, and finally forming by the upper forming die being driven;

step six, heat treatment: and performing dye check after the forming is finished, and performing postweld heat treatment after the detection is qualified.

In the present invention: the coarse forming device comprises a hydraulic cylinder, a double-lug ring, a lifting lug plate, an upper coarse forming die, a lower coarse forming die, a supporting frame and an auxiliary forming mechanism, wherein the lower coarse forming die is driven by a motor, the upper coarse forming die is connected with the hydraulic cylinder through the lifting lug plate and the double-lug ring and is fixed on the supporting frame, the auxiliary forming mechanism is arranged on one side of the lower coarse forming die, the auxiliary forming mechanism is connected with the hydraulic cylinder, and the inclined lifting movement is driven by the hydraulic cylinder.

In the present invention: the forming device comprises a first hydraulic cylinder, a first double-lug ring, a first lifting lug plate, a bearing, a support frame, a lower forming die, an upper forming die and a control system, wherein the lower forming die is driven by a motor, the upper forming die is connected with the first hydraulic cylinder through the first lifting lug plate, the first double-lug ring and the bearing and is fixed on the support frame, the control system is arranged on one side of the lower forming die, the control system can control the rotation of the lower forming die, and the upper forming die moves up and down.

After the technical scheme is adopted, the invention has the beneficial effects that: the invention has simple process and reasonable design, adopts the rolling forming method under the condition of not influencing the performance of the thick-wall corrugated pipe, effectively replaces the traditional hydraulic forming method, saves the investment of hydraulic equipment, and simultaneously can greatly reduce the die sinking cost of the corrugated pipe die of the traditional processing method.

Drawings

FIG. 1 is a schematic process flow diagram of the present invention;

FIG. 2 is a schematic view of a rough forming apparatus of the present invention;

FIG. 3 is a schematic view of a molding apparatus of the present invention.

In the figure: 1. a hydraulic cylinder; 2. a double-earring; 3. a lug plate; 4. an upper coarse forming die; 5. a plate material; 6. a lower part rough forming die; 7. a support frame; 8. an auxiliary forming mechanism; 9. a first hydraulic cylinder; 10. a first double-earring; 11. a first lifting lug plate; 12. a bearing; 13. a support frame; 14. a lower molding die; 15. an upper molding die; 16. and (5) controlling the system.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 3, a roll forming process for thick-walled corrugated pipes includes the following steps:

The coarse forming device comprises a hydraulic cylinder 1, a double-lug ring 2, a lifting lug plate 3, an upper coarse forming die 4, a lower coarse forming die 6, a supporting frame 7 and an auxiliary forming mechanism 8, the lower coarse forming die 6 is driven by a motor, the upper coarse forming die 4 is connected with the hydraulic cylinder 1 through the lifting lug plate 3, the double-lug ring 2 is connected with the hydraulic cylinder 1 and fixed on the supporting frame 7, a plate 5 is placed between the upper coarse forming die 4 and the lower coarse forming die 6, the auxiliary forming mechanism 8 is arranged on one side of the lower coarse forming die 6, the auxiliary forming mechanism 8 is connected with the hydraulic cylinder (not shown in the figure), and the inclined lifting movement is driven by the hydraulic cylinder.

The forming device comprises a first hydraulic cylinder 9, a first double-lug ring 10, a first lifting lug plate 11, a bearing 12, a support frame 13, a lower forming die 14, an upper forming die 15 and a control system 16, wherein the lower forming die 14 is driven by a motor, the upper forming die 15 is connected with the first hydraulic cylinder 9 through the first lifting lug plate 11, the first double-lug ring 10 and the bearing 12 and is fixed on the support frame 13, the control system 16 is arranged on one side of the lower forming die 14, and the control system 16 can control the rotation of the lower forming die 14 and the up-and-down movement of the upper forming die 15.

The above description is directed to specific embodiments of the present invention, but the present invention is not limited to the above description. Any equivalent modifications and alterations to this technical solution would be considered within the scope of this invention by those skilled in the art. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.

Claims

1. A roll forming process of thick-wall corrugated pipes is characterized by comprising the following steps: the method comprises the following steps:

2. The roll forming process of a thick-walled bellows as claimed in claim 1, wherein: the coarse forming device comprises a hydraulic cylinder, a double-lug ring, a lifting lug plate, an upper coarse forming die, a lower coarse forming die, a supporting frame and an auxiliary forming mechanism, wherein the lower coarse forming die is driven by a motor, the upper coarse forming die is connected with the hydraulic cylinder through the lifting lug plate and the double-lug ring and is fixed on the supporting frame, the auxiliary forming mechanism is arranged on one side of the lower coarse forming die, the auxiliary forming mechanism is connected with the hydraulic cylinder, and the inclined lifting movement is driven by the hydraulic cylinder.

3. The roll forming process of a thick-walled bellows as claimed in claim 1, wherein: the forming device comprises a first hydraulic cylinder, a first double-lug ring, a first lifting lug plate, a bearing, a support frame, a lower forming die, an upper forming die and a control system, wherein the lower forming die is driven by a motor, the upper forming die is connected with the first hydraulic cylinder through the first lifting lug plate, the first double-lug ring and the bearing and is fixed on the support frame, the control system is arranged on one side of the lower forming die, the control system can control the rotation of the lower forming die, and the upper forming die moves up and down.