A multi-directional diameter expansion forming device and method for pipe end filling material

Abstract

The present application discloses a multi-directional expansion forming device and method for pipe end filler materials. The device includes a fixing mechanism, an expansion mechanism, and a turning tool module. The expansion mechanism includes a main shaft, a plurality of expansion cylinders are evenly distributed at the front end of the main shaft, an expansion block is provided on the expansion cylinder, and a turning tool module is provided behind the expansion cylinder. The main shaft is set on a bearing seat, and the bearing seat is set on a support plate. The support plate is connected to the base through a main shaft guide rail and a screw. The pipe is fixed by a fixing mechanism, and the filler material is placed outside or inside the pipe end. The screw drives the main shaft to feed, and the expansion cylinder pushes out the expansion block to expand the pipe. After pushing out, it retracts and then pushes out again after the main shaft rotates to achieve multi-directional expansion of the filler material. After the expansion is completed, the turning tool module is started and the main shaft rotates to turn a sealing ring groove and an internal thread inside the pipe. The present application alleviates the problems of poor pipe shape parameters after expansion in existing expansion methods and realizes the rapid processing of sealing ring grooves and thread grooves required for pipe end connection.

Description

Technical Field

[0001] The present invention relates to the field of material forming, and in particular to a device and method for forming a pipe end filling material with multi-directional diameter expansion. Background Art

[0002] Steel pipes are widely used in daily life and production. They are an economical steel material and play an important role in the pipeline transportation of oil and gas resources. They can be used to transport fluids and powdered solids, exchange heat energy, manufacture mechanical parts and containers, etc. Using steel pipes to manufacture building structure grids, pillars and mechanical supports can reduce weight and save 20-40% of metal, and can realize factory-based mechanized construction. However, welding, flange connection and bolt connection between traditional steel pipes have problems such as low safety and low material utilization rate. In addition, the existing diameter expansion technology mostly adopts methods such as oblique rolling diameter expansion, drawing diameter expansion, jacking diameter expansion and mechanical diameter expansion. There are problems such as uneven pipe wall thickness, low wall thickness accuracy, easy exposure and expansion of surface defects of expanded pipe products, large units and serious energy waste. In addition, the existing diameter expansion method is difficult to achieve rapid processing of sealing ring grooves and thread grooves required for pipe port connection.

[0003] Therefore, the existing field of material forming needs to be further improved. Summary of the Invention

[0004] The present invention provides a device and method for forming a multi-directional diameter expansion of a pipe port, the purpose of which is to realize the diameter expansion of the pipe port and to machine internal threads and sealing grooves. The device is used to alleviate technical problems such as uneven wall thickness of the pipe after expansion, low wall thickness accuracy, and easy exposure and expansion of surface defects of the expanded pipe product in the existing expansion method, control the volume of the unit, improve energy utilization, and realize rapid processing of the sealing ring groove and thread groove required for the connection of the pipe port.

[0005] In order to achieve the above object, the present invention adopts the following scheme:

[0006] In a first aspect, the present invention provides a multi-directional diameter expansion and forming device for a pipe port filling material, comprising a fixing mechanism, an expansion mechanism and a turning tool module, wherein:

[0007] The fixing mechanism includes a base, side plates are respectively provided on both sides of the base, a clamping cylinder is provided inwardly of the side plates, a clamping block is provided at the driving end of the clamping cylinder, the driving shafts of the two clamping cylinders are coaxially arranged, and the two clamping blocks are used to clamp and fix the pipe to be expanded;

[0008] The expansion mechanism includes a main shaft, which is mounted on a bearing seat, and the bearing seat is arranged on a support plate. The support plate is slidably connected to the base through a sliding assembly, and a horizontal electric drive mechanism is provided between the support plate and the base for driving the support plate to move horizontally. The axis of the main shaft is perpendicular to the axes of the driving shafts of the two clamping cylinders; a plurality of expansion cylinders are evenly distributed along the circumferential direction on the outer side of the front end of the main shaft, and an expansion block is provided at the driving end of the expansion cylinder. The turning tool module is provided on the main shaft and at an adjacent position behind the expansion cylinder; the rear end of the main shaft is connected to the main shaft drive mechanism.

[0009] Furthermore, the two side plates are connected by a plurality of Corinthian columns, a clamping piston is provided in the clamping cylinder, the clamping movable block is provided on the clamping piston, and the clamping movable block is connected to the base through a movable block guide rail or through the Corinthian columns.

[0010] Furthermore, the sliding assembly includes a spindle guide rail; the horizontal electric drive mechanism includes an electric screw;

[0011] The spindle guide rail and the electric screw are arranged on the base along the spindle axis direction, and the spindle guide rails are divided into two groups and respectively installed on both sides above the base. The support plate is slidably installed on the spindle guide rail, and the nut seat threaded on the electric screw is fixedly connected to the support plate; the front end of the screw is installed on the base through the screw bearing seat, and the rear end is connected to the screw drive mechanism.

[0012] Furthermore, the clamping block is designed as a rectangular block with a semicircular stepped hole on one side; the circular hole formed by the two clamping blocks is coaxial with the main shaft.

[0013] Furthermore, the circular hole formed by the two clamping blocks is a stepped hole, and the stepped hole close to one end of the main shaft is a large-diameter hole.

[0014] Furthermore, the spindle drive mechanism includes a driven gear 2, a driving gear 1 and a spindle motor, the driven gear 2 is installed at the rear end of the spindle, the driving gear 1 is engaged with the driven gear 2, and the driving gear 1 is fixedly connected to the output end of the spindle motor.

[0015] Furthermore, an expanding piston is provided in the expanding cylinder, and an expanding movable block is provided on the expanding piston.

[0016] Furthermore, the turning tool module includes a turning tool cylinder, which is fixed on the main shaft. A turning tool piston is provided in the turning tool cylinder, and a turning tool is provided on the turning tool piston.

[0017] Furthermore, the turning tool module includes a cushion block, which is fixed on the main shaft. A fixing block is provided on the cushion block, and a turning tool is fixed on the fixing block.

[0018] In a second aspect, the present invention provides a method for forming a multi-directional diameter expansion of a pipe end patch, which is applied to the multi-directional diameter expansion device for forming a pipe end patch as described in the first aspect, comprising the following steps:

[0019] 1) The clamping cylinder drives the clamping block to clamp the pipe to be expanded, and then wait for expansion;

[0020] 2) Select the filling method as inner lining filling or outer lining filling;

[0021] Among them, the inner lining patch is to place the patch pipe on the inner wall of the pipe to be expanded, and the outer lining patch is to place the patch pipe on the outer side of the pipe to be expanded.

[0022] 3) The expansion block is driven to extend by the expansion cylinder to expand and shape the pipe to be expanded;

[0023] 4) Retract the expansion block and use the turning tool module to turn the internal thread and sealing groove on the expanded pipe port.

[0024] In summary, the present invention has the following beneficial effects compared to the prior art:

[0025] The present invention solves the shortcomings of existing steel pipe connection and installation methods. Through the structural setting of the present invention, it has the following advantages: the connection between pipes is optimized by expanding the diameter of the pipe port and turning the internal thread and sealing groove. Compared with traditional welding, flange connection, and bolt connection, it has the characteristics of safety, reliability, and high material utilization rate, and realizes the rapid processing of the sealing ring groove and thread groove required for the pipe port connection. For the pipe port filling material expansion, it greatly alleviates the problems of uneven pipe wall thickness, low wall thickness accuracy, and easy exposure and expansion of surface defects of the expanded pipe product, so that the device ensures uniform deformation of the port part during the expansion process and consistent thickness of each part of the pipe port. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the front view of the multi-directional diameter expansion forming device for pipe end filling;

[0027] Figure 2 This is a side view of the multi-directional diameter expansion forming device for pipe end filling;

[0028] Figure 3 This is a top view of the multi-directional expansion and forming device for pipe end filling.

[0029] In the figure: 1. Fixing mechanism; 101. Base; 102. Side plate; 103. Clamping cylinder; 104. Clamping movable block; 105. Coring column; 106. Loose block guide; 107. Clamping piston; 2. Expansion mechanism; 201. Spindle; 202. Expansion cylinder; 203. Expansion movable block; 204. Bearing seat; 205. Support plate; 206. Spindle guide; 207. Electric screw; 208. Screw drive mechanism; 209. Driven gear 2; 210. Expansion piston; 3. Turning tool module; 301. Turning tool cylinder; 302. Turning tool piston; 303. Turning tool. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1 to 3 The present invention provides a multi-directional diameter expansion and forming device for pipe end filling material, comprising a fixing mechanism 1, an expansion mechanism 2 and a turning tool module 3, wherein:

[0032] The fixing mechanism 1 includes a base 101, with side plates 102 provided on both sides of the base 101. A clamping cylinder 103 is provided inwardly of the side plate 102. A clamping block 104 is provided at the driving end of the clamping cylinder 103. The driving shafts of the two clamping cylinders 103 are coaxially arranged. The two clamping blocks 104 are used to clamp and fix the pipe to be expanded.

[0033] The expansion mechanism 2 includes a spindle 201 mounted on a bearing seat 204, which is mounted on a support plate 205. The support plate 205 is slidably connected to the base 101 via a sliding assembly. A horizontal electric drive mechanism is provided between the support plate 205 and the base 101 for driving the support plate 205 to move horizontally. The axis of the spindle 201 is perpendicular to the axes of the drive shafts of the two clamping cylinders 103. Multiple expansion cylinders 202 are evenly distributed along the circumference of the outer front end of the spindle 201. The drive ends of the expansion cylinders 202 are provided with expansion blocks 203. A turning tool module 3 is provided on the spindle 201 and adjacent to the rear of the expansion cylinders 202. The rear end of the spindle 201 is connected to the spindle drive mechanism. Optionally, in some embodiments, four expansion cylinders 202 are provided.

[0034] Furthermore, the two side plates 102 are connected by multiple Corinthian columns 105, and optionally, are connected by four Corinthian columns 105. A clamping piston 107 is provided in the clamping cylinder 103, and a clamping movable block 104 is provided on the clamping piston 107. The clamping movable block 104 is connected to the base 101 through a movable block guide rail 106 or through the Corinthian columns 105.

[0035] Furthermore, the sliding assembly includes a spindle guide rail 206; the horizontal electric drive mechanism includes an electric screw 207;

[0036] The spindle guide rail 206 and the electric screw rod 207 are arranged on the base 101 along the axial direction of the spindle 201, and the spindle guide rail 206 is divided into two groups and installed on both sides above the base 101 respectively. The support plate 205 is slidably installed on the spindle guide rail 206, and the nut seat threaded on the electric screw rod 207 is fixedly connected to the support plate 205; the front end of the screw rod 207 is installed on the base 101 through the screw rod bearing seat, and the rear end is connected to the screw rod drive mechanism 208.

[0037] Furthermore, the clamping block 104 is designed as a rectangular block with a semicircular stepped hole on one side; the circular hole formed by the two clamping blocks 104 is coaxial with the main shaft 201.

[0038] Furthermore, the circular hole formed by the two clamping blocks 104 is a stepped hole, and the stepped hole is a large-diameter hole at one end close to the main shaft 201 .

[0039] Furthermore, the spindle drive mechanism includes a driven gear 209, a driving gear 1 and a spindle motor. The driven gear 209 is installed at the rear end of the spindle 201, the driving gear 1 is engaged with the driven gear 209, and the driving gear 1 is fixedly connected to the output end of the spindle motor.

[0040] Furthermore, an expanding piston 210 is provided in the expanding cylinder 202 , and an expanding movable block 203 is provided on the expanding piston 210 .

[0041] Furthermore, one type of turning tool module 3 includes a turning tool cylinder 301 , which is fixed on the spindle 201 . A turning tool piston 302 is provided in the turning tool cylinder 301 , and a turning tool 303 is provided on the turning tool piston 302 .

[0042] Furthermore, another type of turning tool module 3 can be selected, which includes a pad fixed on the spindle 201, a fixing block provided on the pad, and a turning tool 303 fixed on the fixing block.

[0043] The working principle of the above-mentioned pipe end filling multi-directional diameter expansion forming device is as follows:

[0044] The oil inflow of the rodless cavity of the clamping oil cylinder 103 drives the clamping piston 107 to push the clamping movable block 104 inward, so that the two clamping movable blocks 104 clamp and fix the pipe. After the pipe is clamped and fixed, the oil inflow of the rodless cavity of the clamping oil cylinder 103 stops. When the lining material filling method is adopted, the lining pipe is put on the oil cylinder of the main shaft 201, and the motor drives the screw rod 207 to realize the feeding of the main shaft 201. When the working length of the pipe port expansion is reached, the motor drives the screw rod 207 to realize the feeding of the main shaft 201. The motor of rod 207 stops feeding, and the rodless cavity of the expanding oil cylinder 202 is filled with oil to push the expanding piston 210 and the expanding block 203 radially outward along the main shaft 201, and the inner lining is fully supported and close to the inner wall of the pipe to complete the inner lining filling. When the outer lining filling method is adopted, the outer lining pipe is put on the outer side of the port of the pipe to be expanded to complete the outer lining filling. After the filling is completed, the rodless cavity of the expanding oil cylinder 202 continues to fill with oil, and advances outward in small increments of 5 mm. The motor drives the spindle 201 to rotate 45° and then pushes it out in the other direction by 5mm. After it is pushed out and retracted, the motor drives the spindle 201 to rotate 45° to continue expanding the diameter. This is repeated until the required expansion size of the pipe is reached and the expansion is completed. The expansion block 203 is fixed and the motor continues to drive the spindle 201 to rotate to shape the inner wall of the pipe. After the shaping is completed, oil is supplied to the rod cavity of the expansion cylinder 202, and the expansion piston 210 and the expansion block 203 are retracted together, driving the screw rod 207 to feed the spindle 201 forward. When the milling cutter contacts the inner wall of the transition area between the original size of the pipe and the expanded size of the pipe, the motor drives the spindle 201 to rotate and drive the spindle 201 to feed slowly, milling a sealing groove in the wall of the transition area. After the sealing groove is milled, the spindle 201 begins to withdraw outward and extends the turning tool piston 302 during the withdrawal process to realize threading.

[0045] On the other hand, the present invention further provides a method for forming a multi-directional diameter expansion of a pipe end patch, which is applied to the multi-directional diameter expansion of a pipe end patch device of the aforementioned embodiment. The method comprises the following steps:

[0046] 1) The clamping cylinder 103 drives the clamping block 104 to clamp the pipe to be expanded, and then waits for expansion;

[0047] 2) Select the filling method as inner lining filling or outer lining filling;

[0048] Among them, the inner lining patch is to place the patch pipe on the inner wall of the pipe to be expanded, and the outer lining patch is to place the patch pipe on the outer side of the pipe to be expanded.

[0049] 3) The expansion block 203 is driven to extend by the expansion cylinder 202 to expand and shape the pipe to be expanded;

[0050] 4) Retract the expanding block 203 and use the turning tool module 3 to turn the internal thread and sealing groove on the expanded pipe end.

[0051] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-directional diameter expansion forming device for pipe end filling material, characterized by: It comprises a fixing mechanism (1), a diameter expansion mechanism (2) and a turning tool module (3), wherein: The fixing mechanism (1) includes a base (101), side plates (102) are respectively provided on both sides of the base (101), a clamping cylinder (103) is provided inwardly of the side plate (102), a clamping block (104) is provided at the driving end of the clamping cylinder (103), the driving shafts of the two clamping cylinders (103) are coaxially arranged, and the two clamping blocks (104) are used to clamp and fix the pipe to be expanded; The expansion mechanism (2) includes a main shaft (201), the main shaft (201) is mounted on a bearing seat (204), the bearing seat (204) is arranged on a support plate (205), the support plate (205) is slidably connected to the base (101) through a sliding assembly, and a horizontal electric drive mechanism is arranged between the support plate (205) and the base (101) for driving the support plate (205) to move horizontally, the axis of the main shaft (201) is perpendicular to the axes of the drive shafts of the two clamping cylinders (103); a plurality of expansion cylinders (202) are uniformly distributed along the circumferential direction on the outer side of the front end of the main shaft (201), the driving end of the expansion cylinder (202) is provided with an expansion block (203), the turning tool module (3) is arranged on the main shaft (201) and at a position adjacent to the rear of the expansion cylinder (202); the rear end of the main shaft (201) is connected to the main shaft drive mechanism.

2. The multi-directional diameter expansion forming device for pipe end filling material according to claim 1, characterized in that: The two side plates (102) are connected via a plurality of Corinthian columns (105), a clamping piston (107) is provided in the clamping oil cylinder (103), a clamping movable block (104) is provided on the clamping piston (107), and the clamping movable block (104) is connected to the base (101) via a movable block guide rail (106) or through the Corinthian columns (105).

3. The multi-directional diameter expansion forming device for pipe end filling material according to claim 1, characterized in that: The sliding assembly includes a spindle guide rail (206); the horizontal electric drive mechanism includes an electric screw rod (207); The spindle guide rail (206) and the electric screw rod (207) are arranged on the base (101) along the axis direction of the spindle (201), and the spindle guide rail (206) is composed of two groups, which are respectively installed on both sides above the base (101). The support plate (205) is slidably installed on the spindle guide rail (206), and the nut seat threadedly connected on the electric screw rod (207) is fixedly connected to the support plate (205); the front end of the electric screw rod (207) is installed on the base (101) through a screw rod bearing seat, and the rear end is connected to a screw rod driving mechanism.

4. The multi-directional diameter expansion forming device for pipe end filling material according to claim 1, characterized in that: The clamping block (104) is designed as a rectangular block with a semicircular stepped hole on one side; the circular hole formed by the two clamping blocks (104) is coaxial with the main shaft (201).

5. The multi-directional diameter expansion forming device for pipe end filling material according to claim 4, characterized in that: The circular hole formed by the two clamping blocks (104) is a stepped hole, and the stepped hole is a large-diameter hole at one end close to the main shaft (201).

6. The multi-directional diameter expansion forming device for pipe end filling material according to claim 1, characterized in that: The spindle drive mechanism comprises a driven gear 2 (209), a driving gear 1 and a spindle motor, wherein the driven gear 2 (209) is mounted on the rear end of the spindle (201), the driving gear 1 is meshed with the driven gear 2 (209), and the driving gear 1 is fixedly connected to the output end of the spindle motor.

7. The multi-directional diameter expansion forming device for pipe end patching according to claim 1, characterized in that: An expanding piston (210) is provided in the expanding oil cylinder (202), and an expanding movable block (203) is provided on the expanding piston (210).

8. The multi-directional diameter expansion forming device for pipe end filling material according to claim 1, characterized in that: The turning tool module (3) comprises a turning tool cylinder (301), the turning tool cylinder (301) is fixed on the main shaft (201), a turning tool piston (302) is arranged in the turning tool cylinder (301), and a turning tool (303) is arranged on the turning tool piston (302).

9. The multi-directional diameter expansion forming device for pipe end patching according to claim 1, characterized in that: The turning tool module (3) comprises a cushion block, the cushion block is fixed on the main shaft (201), a fixing block is provided on the cushion block, and a turning tool (303) is fixed on the fixing block.

10. A method for forming a multi-directional diameter expansion of a pipe end patch, applied to the multi-directional diameter expansion device for forming a pipe end patch according to any one of claims 1 to 9, characterized in that: The following steps are involved: 1) The clamping cylinder (103) drives the clamping block (104) to clamp the pipe to be expanded, and then waits for expansion; 2) Select the filling method as inner lining filling or outer lining filling; Among them, the inner lining patch is to place the patch pipe on the inner wall of the pipe to be expanded, and the outer lining patch is to place the patch pipe on the outer side of the pipe to be expanded. 3) driving the expansion block (203) to extend through the expansion cylinder (202) to expand and shape the pipe to be expanded; 4) retracting the expanding block (203) and using the turning tool module (3) to turn the internal thread and the sealing groove on the expanded pipe end.

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