A multi-boost block integrated elbow forming line driving boost device

Abstract

The application discloses a kind of multiple push block integrated elbow forming line drive push device.It includes multiple movable push block, line drive force module and shell fixed module, movable push block is distributed along the circumference interval on shell fixed module, the inside of each movable push block is contacted with the outer convex side tube wall of straight pipe blank, provides different tangential push force for elbow pipe in bending process, the size of tangential push force can be adjusted by the screwing depth of flat head top wire on intermediate support module, line drive force module moves forward and backward by capstan and kewla line fixed on both sides of capstan to control movable push block, realizes the adjustment of tangential push force action position and push speed.The application realizes the effective adjustment of tangential push force in circumferential direction of elbow pipe in rotary stretching bending process, can further reduce the cross-section distortion of elbow pipe, improves the forming quality of pipe bending and provides conditions for related scientific research.

Description

Technical Field

[0001] This invention belongs to the field of metal tube bending and forming, and particularly relates to a bending tube forming line drive booster device integrating multiple booster blocks. Background Technology

[0002] Metal thin-walled bends are widely used in various fields of modern industry due to their unique structure, beautiful appearance, and excellent performance. Straight tube blanks can be processed into bends of the required specifications through rotational stretching and bending. However, bending defects are unavoidable during the process. Bent tubes often exhibit defects such as thinning of the outer convex side wall, thickening of the inner concave side wall, flattening and distortion of the entire cross-section, and wrinkling. These defects seriously affect the quality and service life of the bends and require strict control during manufacturing.

[0003] As a crucial component of rotary stretching and bending dies, pressure dies improve the uneven stress distribution across the cross-section of bent pipes, thereby reducing defects such as wall thickness reduction and cross-sectional flattening distortion, which significantly enhances the forming quality of bent pipes. However, traditional single-piece pressure dies, due to their simple structure and limited form, often prevent operators from adjusting the magnitude, position, and speed of the tangential thrust in the circumferential direction according to actual conditions, thus greatly diminishing the thrusting effect of the pressure die. To produce more dimensionally accurate metal bent pipes and meet relevant research needs, a novel, low-cost thrusting device capable of adjusting the tangential thrust in the circumferential direction of the bent pipe's cross-section is required. Summary of the Invention

[0004] To address the problems in the background art, this invention provides a multi-booster integrated wire-driven bending forming device. This device can adjust the tangential thrust applied to different positions on the convex side of the pipe fitting based on the stress-strain variation trend on the pipe's cross-section, thereby improving the forming quality of the bent pipe. The movable booster blocks provide different tangential thrusts to the bent pipe during the bending process. The magnitude of the tangential thrust can be adjusted by the screw depth of the flat-headed set screw on the intermediate support mold. The wire-driven force module controls the forward and backward movement of the movable booster blocks via a winch and Kevlar wires fixed on both sides of the winch, thus adjusting the position and speed of the tangential thrust.

[0005] The technical solution adopted in this invention is as follows:

[0006] I. A multi-booster integrated tube bending forming wire-driven booster device

[0007] It includes multiple movable booster blocks, a linear drive force module, and a shell fixing module. Multiple circumferentially distributed strip-shaped movable booster blocks are installed on the inner side of the shell fixing module. The top surfaces of these movable booster blocks are respectively mounted on multiple slide rails set on the inner side of the shell fixing module, and their bottom surfaces contact the outer convex side wall of the straight tube blank. The contact pressure between the movable booster blocks and the straight tube blank is adjusted by adjusting the screw depth of the flat-headed set screw on the intermediate support mold. Each movable booster block reciprocates on the shell fixing module under the control of its corresponding linear drive force module. Each movable booster block applies different tangential boosting forces to different positions of the tube fitting through its relative movement with the straight tube blank.

[0008] The movable booster block includes an intermediate support mold, a pressure mold liner, a slider, and a flat-headed ejector screw. The bottom surface of the intermediate support mold has a through-slot extending from front to back. The pressure mold liner is located within the through-slot and its shape is adapted to the through-slot. The pressure mold liner and the through-slot have a clearance fit in the circumferential direction, and a movement allowance is left in the radial direction. The top of the intermediate support mold has multiple threaded holes spaced apart, and the top of the pressure mold liner has multiple countersunk holes communicating with the threaded holes. The flat-headed ejector screw extends through the threaded holes of the intermediate support mold into the countersunk holes of the pressure mold liner. The flat-headed ejector screw is fixed to the intermediate support mold by a threaded fit, and its flat end contacts the bottom of the countersunk hole. A slider is fixed to the top surface of the intermediate support mold.

[0009] The countersunk hole of the pressure die liner is a smooth hole with a flat bottom surface and a diameter larger than the major diameter of the flat-head set screw thread. The inner surface of the pressure die liner is arc-shaped to contact the tube wall and provide thrust. By tightening the flat-head set screw on the intermediate support die, the radial pressure on the pressure die liner is increased, thereby increasing the contact pressure between the pressure die liner and the straight tube blank, and thus increasing the tangential thrust on the straight tube blank. Conversely, the tangential thrust can be reduced by tightening the set screw.

[0010] The outer casing fixing module includes an outer casing, slide rails, and V-type bearing fixing seats. The inner surface of the outer casing has an arched structure, which is composed of multiple planes connected sequentially. The arched cross-section is composed of multiple line segments connected end to end sequentially. Each line segment has an equal length, and the included angle formed by two adjacent line segments is equal. Each plane on the inner surface of the outer casing is fixed with a slide rail extending in the front-back direction. The intermediate support module is installed on the outer casing through the sliding fit between the slider fixed on the top surface and the slide rail. Limiting blocks are provided at both ends of the slide rail to limit the slider. Each slide rail has a strip-shaped groove extending in the front-back direction. The ends of the strip-shaped groove do not extend through the slide rail. The outer casing has through slots that are the same shape as the strip-shaped grooves and are interconnected. V-type bearing fixing seats are installed on the outer surface of the outer casing near the front and rear ends of each through slot by bolts. V-type bearings are installed on each V-type bearing fixing seat and the limiting block by plug bolts and nuts.

[0011] The position of the flat-head set screw of the intermediate support mold corresponds to the position of the through groove of the outer shell and the position of the strip groove of the slide rail; the Allen wrench is inserted from the through groove of the outer shell and then adjusted through the strip groove of the slide rail to adjust the screwing depth of the flat-head set screw on the intermediate support mold.

[0012] The linear drive module includes a winch support, a winch, and Kevlar wires. A winch is mounted between two V-bearing fixing seats corresponding to each through slot, with the winch support supporting the winch. The winch has the same inclination angle as the V-bearings on the left and right V-bearing fixing seats. Two symmetrically positioned and axially staggered U-shaped holes are opened on the circumference of the winch. One end of each of the two symmetrically arranged Kevlar wires is fixed in the U-shaped holes on both sides of the winch. The other end of one Kevlar wire is sequentially fixed to the wire slot at the front end of the slider via the V-bearing fixing seat at the front and the V-bearing on the limiting block. The other end of the other Kevlar wire is sequentially fixed to the wire slot at the rear end of the slider via the V-bearing fixing seat at the rear and the V-bearing on the limiting block. The V-bearings tighten and limit the Kevlar wires.

[0013] The winch support is bolted to the housing. The winch is mounted on the winch support via a winch shaft, which is connected to the winch support via two flange bearings. Corresponding pin slots are formed on the central shaft hole of the winch and on the winch shaft. The winch shaft is mounted on the winch via a transition fit between the pin slots and the pins. Two snap ring slots are formed on the winch shaft for mounting a small snap ring and a large snap ring, which are used for axial positioning of the winch shaft.

[0014] The winch shaft is connected to an external motor, which drives the winch to rotate, causing the Kevlar cable on one side to be released from the winch and the Kevlar cable on the other side to be wound onto the winch. The movable pusher block moves back and forth along the slide rail under the drive of the Kevlar cable.

[0015] II. Working method of a multi-booster integrated tube bending forming line drive booster device

[0016] Includes the following steps:

[0017] Step 1: Fix the entire booster device onto the pipe bending machine through the outer casing. Drive the winch to rotate clockwise or counterclockwise by an external motor to release or wind the Kevlar wire on both sides of the winch, thereby adjusting the position of each movable booster block relative to the straight pipe blank.

[0018] Step 2: After the position is adjusted, apply lubricating oil to the bottom surface of each pressure die liner. Use an Allen wrench to change the screw depth of the flat-head set screw on the intermediate support die. Adjust the contact pressure between each pressure die liner and the straight tube blank by adjusting the extrusion pressure of the flat-head set screw on the pressure die liner.

[0019] Step 3: During the bending process of the pipe fitting, the external hydraulic cylinder drives the entire booster device to move along the feeding direction of the pipe fitting. At this time, the external motor drives each winch to rotate and finely adjusts the movement speed of each movable booster block.

[0020] This allows each movable booster block to adjust the magnitude, position, and booster speed of the tangential booster force on the pipe in the circumferential direction.

[0021] By adjusting the state of each movable booster block on the booster device, the magnitude, position, and speed of each tangential booster force in the circumferential direction of the bent pipe are changed, generating multiple booster forces that vary along the circumferential direction to conform to the stress and strain distribution law on the cross-section of the bent pipe, thereby improving the forming quality of the bent pipe.

[0022] The movable booster block can be replaced as needed to change the contact area between the pressure mold liner and the straight tube blank during processing.

[0023] The beneficial effects of this invention are:

[0024] (1) After the assembly is completed, the screwing depth of the flat-head top screw on the intermediate support mold can be directly and quickly adjusted through the through groove on the outer shell and the slide rail, thereby adjusting the contact pressure between the inner lining of each pressure mold and the straight tube blank, improving the uneven tangential stress distribution on the cross section of the bent tube during the processing, and pushing more material into the bending deformation zone to improve the forming quality of the bent tube.

[0025] (2) The present invention drives each movable booster block to move back and forth by rotating the winch clockwise or counterclockwise, thereby changing the position of the tangential booster force in the circumferential direction and the booster speed during processing, providing conditions for reducing the distortion of the pipe section, exploring the optimal process parameters and carrying out related scientific research.

[0026] (3) The present invention can replace parts such as intermediate support mold and pressure mold liner according to actual needs. The replacement process is convenient, quick and inexpensive. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall invention.

[0028] Figure 2 This is a side view of the entire invention.

[0029] Figure 3 (a) and Figure 3 (b) are schematic diagrams and cross-sectional views of the movable booster block, respectively.

[0030] Figure 4 This is an exploded view of the linear drive force module.

[0031] Figure 5 (a) Figure 5(b) Figure 5 (c) are the front view, side view and sectional view of the winch, respectively.

[0032] Figure 6 This is a schematic diagram of the outer casing fixing module.

[0033] Figure 7 This is a schematic diagram of the slide rail, limit block, and V-bearing inside the housing.

[0034] Figure 8 (a) and Figure 8 (b) are schematic diagrams and side views of the outer casing, respectively.

[0035] Figure 9 This is a schematic diagram showing how the depth of the flat-head set screw in the threaded hole of the intermediate support mold is adjusted by the through grooves of the housing and slide rail.

[0036] Figure 10 A schematic diagram illustrating the operation of a single movable booster block driven by the rotation of a winch.

[0037] In the diagram: 1. Movable booster block, 2. Linear drive force module, 3. Housing fixing module, 4. Straight tube blank, 5. Intermediate support mold, 6. Slider, 7. Flat-head set screw, 8. Pressure mold liner, 9. Winch support seat, 10. Bolt, 11. Small snap ring, 12. Flange bearing, 13. Pin, 14. Winch, 15. Winch shaft, 16. Large snap ring, 17. Kevlar wire, 18. V-type bearing support seat, 19. Cushion bolt, 20. V-type bearing, 21. Nut, 22. Housing, 23. Bolt, 24. Slide rail, 25. Limiting block, 26. U-shaped hole, 27. Wire groove hole. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] like Figure 1 and Figure 2 As shown, a multi-booster integrated bending tube forming wire-driven booster device includes multiple movable booster blocks 1, a wire drive force module 2, and a housing fixing module 3. The top surfaces of the five sets of movable booster blocks 1 distributed circumferentially are fixed on the housing fixing module 2, and the bottom surfaces are in contact with the outer convex side wall of the straight tube blank 4. During the rotation, stretching and bending process, each movable booster block 1 provides different tangential boosting forces to the bent tube through the relative movement between it and the straight tube blank 4. Each movable booster block has a corresponding set of wire drive force modules 2 to control its reciprocating motion on the housing fixing module 3.

[0040] like Figure 3 (a) and Figure 3As shown in (b), the movable booster block 1 includes an intermediate support mold 5, a slider 6, a flat-headed set screw 7, and a pressure mold liner 8. The intermediate support mold 5 has through slots on both its front and rear sides, and three threaded holes and a stepped hole for fixing the slider 6 are sequentially opened on its top. The two sliders 6 are fixed to the intermediate support mold 5 with bolts. The pressure mold liner 8 has an inner side near the straight tube blank 4, which is arc-shaped, and an outer side near the outer shell. Its overall shape is consistent with the through slots of the intermediate support mold 5. The top has countersunk holes with the same number of threaded holes as the intermediate support mold 5. The pressure mold liner 8 and the intermediate support mold 5 are aligned in the circumferential direction. The clearance fit allows for some movement in the radial direction. The flat-headed set screw 7 is fixed to the intermediate support mold 5 by a threaded fit. Its flat end extends into the countersunk hole of the pressure mold liner 8. The countersunk hole of the pressure mold liner 8 is a smooth hole with a diameter larger than the major diameter of the thread of the flat-headed set screw 7. Therefore, only the bottom flat end of the flat-headed set screw 7 contacts the bottom of the countersunk hole of the pressure mold liner 8. By tightening the flat-headed set screw 7 on the intermediate support mold 5, the radial pressure on the pressure mold liner 8 can be increased, thereby increasing the contact pressure between the pressure mold liner 8 and the straight tube blank 4, and thus increasing the tangential thrust. Conversely, tightening the set screw 7 can reduce the tangential thrust.

[0041] like Figure 4 and Figure 5 As shown, the linear drive module 2 includes a winch support 9, a small snap ring 11, a flange bearing 12, a pin 13, a winch 14, a winch shaft 15, a large snap ring 16, and Kevlar cable 17. The winch support 9 is fixed to the outer casing fixing module 3 by bolts 10. The winch shaft 15 has two snap ring slots for installing the small snap ring 11 and the large snap ring 16, respectively. The function of these two snap rings is to provide axial positioning for the entire winch shaft system. Two flange bearings 12 are installed between the winch shaft 15 and the winch support 9 to avoid friction between the winch shaft 15 and the winch support 9. The winch 14 has two symmetrical but axially offset U-shaped holes 2 on its circumferential surface. 6. One end of the Kevlar wire 17 is passed through the U-shaped hole 26 of the winch 14 and knotted to fix it on the winch 14. The other end of the Kevlar wire 17 is fixed in the wire groove hole 27 of the slider 6 in the same way. By rotating the winch 14 clockwise or counterclockwise, one end of the Kevlar wire 17 can be released while the other end of the Kevlar wire 17 is tightened, thereby adjusting the position of each movable push block 1 relative to the straight tube blank 4. The shaft hole of the winch 14 and the winch shaft 15 are both provided with pin grooves for transition fit with pins. The thick shaft end of the winch shaft 15 is connected to an external motor. The external motor controls the movement of the winch 14 by rotating the winch shaft 15.

[0042] like Figure 6 , Figure 7 and Figure 8As shown, the outer casing fixing module includes a V-bearing fixing seat 18, a V-bearing 20, an outer casing 22, a slide rail 24, and a limiting block 25. The outer casing 22 is the basic component of the entire booster device, and all other components are directly or indirectly connected to the outer casing 22. The V-bearing fixing seat 18, the slide rail 24, and the limiting block 25 are installed on the outer casing 22 by bolts 23. The upper part of the V-bearing fixing seat 18 is ear-shaped, and the ear-shaped structure is used to cooperate with the plug bolts 19 and nuts 21 to install the V-bearing 20. The function of the V-bearing 20 is to tighten and limit the Kevlar cable 17 to ensure the normal operation of the linear drive force module 2. It is also installed on the limiting block 25 with the same structure. The slide rail 24, located on the polygonal plane inside the outer casing 22, fixes the movable booster block 1 on the outer casing 22 through cooperation with the slider 6, and limits the movement range of the slider 6 by the limiting block 25. The slide rail 24 and the outer casing 22 have through grooves of the same shape for adjusting the screw depth of the flat-head set screw 7. Figure 9 As shown, the flat-head set screw 7 on the intermediate support mold 5 can be seen through the through groove on the outer shell 22 and the slide rail 24. After adjusting the position of each movable push block 1, the screwing depth of the flat-head set screw 7 can be directly adjusted by inserting an Allen wrench into the through groove, thereby changing the contact pressure between each pressure mold liner 8 and the straight tube blank 4.

[0043] like Figure 10 As shown, before the winch 14 rotates, a portion of the Kevlar cable 17 on the left side is wound counterclockwise onto the winch 14, and a portion of the Kevlar cable 17 on the right side is wound clockwise onto the winch 14. When the winch 14 rotates clockwise, the Kevlar cable 17 on the left side is wound onto the winch 14, and the Kevlar cable 17 already wound onto the winch 14 on the right side is released, thereby driving the movable booster block 1 to move to the left. When the winch 14 rotates counterclockwise, the Kevlar cable 17 on the right side is wound onto the winch 14, and the Kevlar cable 17 already wound onto the winch 14 on the left side is released, thereby driving the movable booster block 1 to move to the right. Detailed implementation method:

[0045] When using this invention, the entire booster device is fixed to the pipe bending machine via the housing 22. An external motor drives each winch 14 to rotate, releasing or winding the Kevlar wire 17 on both sides of each winch 14, thereby adjusting the position of each movable booster block 1 relative to the straight pipe blank 4 (the positions of different movable booster blocks 1 relative to the straight pipe blank 4 can be different). After the position adjustment is complete, the inner side of the pressure mold liner 8 is coated with the specified lubricating oil. The booster device is controlled to contact the pipe wall of the straight pipe blank 4. An Allen wrench is used to adjust the flat-head set screw 7. The degree of screwing into the intermediate support mold 5 is adjusted to regulate the magnitude of the tangential thrust. After increasing the contact pressure between the inner lining 8 of each pressure mold and the straight tube blank 4 to a specified range, the rotational stretching and bending of the tube begins. During the process, the external hydraulic cylinder drives the entire thrust device to move along the feed direction of the straight tube blank 4. At this time, as needed, each winch 14 is driven to rotate, thereby fine-tuning the speed of each movable thrust block 1, so as to adjust the magnitude, position and speed of each tangential thrust in the circumferential direction.

Claims

1. A multi-boost-block integrated tube bending line drive boosting device, characterized by, The application relates to a movable boosting block (1), a wire driving force module (2) and a shell fixing module (3); a plurality of strip-shaped movable boosting blocks (1) are arranged on the inner side of the shell fixing module (3) in a circumferential direction, the top surfaces of the plurality of movable boosting blocks (1) are respectively arranged on a plurality of slide rails (24) arranged on the inner side of the shell fixing module (3), the bottom surfaces of the plurality of movable boosting blocks (1) are in contact with the outer convex side pipe wall of a straight pipe blank (4); the contact pressure between the movable boosting block (1) and the straight pipe blank (4) is adjusted by adjusting the screwing depth of a flat head jackscrew (7) on an intermediate support module (5); each movable boosting block (1) reciprocates on the shell fixing module (3) under the control of a corresponding wire driving force module (2), and each movable boosting block (1) applies different tangential boosting forces to different positions of the pipe by relative movement between the movable boosting block (1) and the straight pipe blank (4). The shell fixing module (3) comprises a shell (22), a slide rail (24) and a V-shaped bearing fixing base (18); the inner side of the shell (22) is in an arc structure, and the arc structure is composed of a plurality of planes connected in sequence; each plane on the inner side of the shell (22) is fixed with a slide rail (24) extending in the front-back direction, the intermediate support module (5) is arranged on the shell (22) through the sliding fit between the slide block (6) fixed on the top surface and the slide rail (24), and the slide rail (24) is provided with a limiting block (25) limiting the slide block (6) at both ends; each slide rail (24) is provided with a strip-shaped slide groove extending in the front-back direction, the strip-shaped slide groove does not extend through the slide rail (24) at both ends, the shell (22) is provided with a through groove consistent with the shape of the strip-shaped slide groove and communicating with the strip-shaped slide groove; the V-shaped bearing fixing base (18) is arranged on the outer side of the shell (22) and close to the front end and the rear end of each through groove through bolts; each V-shaped bearing fixing base (18) and limiting block (25) are provided with a V-shaped bearing (20) through a jam bolt (19) and a nut (21).

2. A multi-boost block integrated bend forming line drive boosting device according to claim 1, characterized in that, The movable boosting block (1) comprises an intermediate support module (5), a pressure module lining (8), a slide block (6) and a flat head jackscrew (7); The bottom surface of the intermediate support module (5) is provided with a through groove extending in the front-back direction, the pressure module lining (8) is located in the through groove and is matched with the shape of the through groove; the pressure module lining (8) is matched with the through groove in the circumferential direction with a gap and is left with a moving allowance in the radial direction; The top part of the intermediate support module (5) is provided with a plurality of threaded holes at intervals, the top part of the pressure module lining (8) is provided with a plurality of counterbores communicating with the threaded holes; the flat head jackscrew (7) extends into the counterbores of the pressure module lining (8) through the threaded holes of the intermediate support module (5), and the flat head jackscrew (7) is fixed on the intermediate support module (5) through thread cooperation, and the flat head end is in contact with the bottom of the counterbores; The slide block (6) is fixed on the top surface of the intermediate support module (5).

3. A multi-boost block integrated bend forming line drive boost device according to claim 2, wherein, The pressure mold liner (8) has a counterbore with a light hole and a flat bottom surface, and the hole diameter is larger than the large diameter of the flat head thread (7) thread; the bottom surface of the pressure mold liner (8) is arc-shaped, used for contacting the pipe wall and providing a boost force; by tightening the flat head thread (7) on the intermediate support mold (5), the radial pressure on the pressure mold liner (8) is increased, thereby increasing the contact pressure between the pressure mold liner (8) and the straight pipe blank (4), and further increasing the tangential boost force on the straight pipe blank (4), and vice versa.

4. A multi-boost block integrated bend forming line drive boost device according to claim 1, wherein, The position of the flat head thread (7) of the intermediate support mold (5) corresponds to the position of the through slot of the shell (22) and the position of the strip-shaped sliding groove of the sliding rail (24); the inner hexagonal wrench is inserted into the through slot of the shell (22) and then adjusts the rotation depth of the flat head thread (7) on the intermediate support mold (5) through the strip-shaped sliding groove of the sliding rail (24).

5. A multi-boost block integrated bend forming line drive boost device according to claim 1, wherein, The wire driving force module (2) comprises a winch support seat (9), a winch (14) and a Kevlar wire (17), two V-shaped bearing fixing seats (18) corresponding to each through slot are provided with the winch (14) installed through the winch support seat (9) in the middle; two positionally symmetrical and axially staggered U-shaped holes (26) are formed on the circumferential surface of the winch (14); one end of each of the two symmetrically arranged Kevlar wires (17) is fixed in the U-shaped hole (26) on the two sides of the winch (14), and the other end of one of the Kevlar wires (17) is sequentially fixed in the wire slot hole (27) at the front end of the sliding block (6) through the V-shaped bearing (20) on the front V-shaped bearing fixing seat (18) and the limiting block (25), and the other end of the other Kevlar wire (17) is sequentially fixed in the wire slot hole (27) at the rear end of the sliding block (6) through the V-shaped bearing (20) on the rear V-shaped bearing fixing seat (18) and the limiting block (25), and the Kevlar wire (17) is clamped and limited by the V-shaped bearing (20).

6. A multi-boost block integrated bend forming line drive boost device according to claim 5, wherein, The winch support seat (9) is fixed on the shell (22) by bolts (10), the winch (14) is installed on the winch support seat (9) by a winch shaft (15), and the winch shaft (15) is connected with the winch support seat (9) by two flange bearings (12); the center shaft hole of the winch (14) and the winch shaft (15) are respectively provided with positionally corresponding pin grooves, and the winch shaft (15) is installed on the winch (14) through transition fit of the pin grooves and pins (13); two snap spring grooves are formed on the winch shaft (15) for installing small snap springs (11) and large snap springs (16), and the small snap springs (11) and the large snap springs (16) are used for axial positioning of the winch shaft.

7. A multiple booster integrated elbow forming line booster device as recited in claim 6 wherein, The winch shaft (15) is connected with an external motor, the winch (14) is driven to rotate by the external motor, one side of the Kevlar wire (17) is released from the winch (14), the other side of the Kevlar wire (17) is wound on the winch (14), and the movable boost block (1) moves along the sliding rail (24) under the driving of the Kevlar wire (17).

8. A method of operating a multiple booster block integrated tube bending line drive booster device according to any one of claims 1 to 7, characterized in that, The method comprises the following steps: Step 1: Fix the whole boosting device on the bending machine through the shell (22), drive the capstan (14) to rotate clockwise or counterclockwise by the external motor to release or wind the Kevlar line (17) on both sides of the capstan (14), and then adjust the position of each movable boosting block (1) relative to the straight pipe blank (4); Step 2: After the position adjustment is completed, apply lubricating oil to the bottom surface of each pressure die liner (8), use an internal hex wrench to change the screwing depth of the flat head jack screw (7) on the intermediate support die (5), and adjust the contact pressure between each pressure die liner (8) and the straight pipe blank (4) by adjusting the extrusion force of the flat head jack screw (7) on the pressure die liner (8); Step 3: During the bending of the pipe, the external oil cylinder drives the whole boosting device to move along the pipe feeding direction, and then the external motor drives each capstan (14) to rotate to fine-tune the movement speed of each movable boosting block (1); Thus, the size, position and boosting speed of each tangential boosting force of each movable boosting block (1) in the circumferential direction of the pipe are adjusted.

9. The method of working according to claim 8, characterized in that, By adjusting the state of each movable boosting block (1) on the boosting device, the size, position and action speed of each tangential boosting force in the circumferential direction of the bent pipe are changed, multiple boosting forces varying along the circumference are generated, the distribution law of stress and strain on the cross section of the bent pipe is met, and the forming quality of the bent pipe is improved.

Images