A portable free pipe bending machine and forming method

Abstract

The present invention relates to the field of free bending progressive forming manufacturing technology, specifically disclosing a portable free pipe bending machine device and forming method to solve the problems existing in the prior art; the device comprises a pipe bending body, a displacement mechanism is provided at the bottom of the pipe bending body, a bending module for bending the pipe is provided on the pipe bending body, a guide rail is provided at the feeding position of the bending module to guide the pipe, and a push rod is provided at the end of the guide rail to push the tail of the pipe. The present invention addresses the problems of the original equipment being bulky, inconvenient to store and even more inconvenient to transport, and the fact that all pipe processing must be carried out at the location of the equipment, which greatly increases the time, manpower, and material costs. The present invention adopts a multi-stage telescopic guide rail control mechanism and a multi-stage conveyor chain forming method to reduce the size of the device while meeting various practical needs. The requirements for forming time limits in specific scenarios can be met by flexibly adjusting the axial propulsion speed and controlling the forming time.

Description

Technical Field

[0001] The present invention relates to the technical field of free bending incremental forming manufacturing, in particular to portable free pipe bending machine equipment and forming method. Background Art

[0002] Currently, complex curved components play a wide and important role in many fields such as aerospace, automobiles, and ships. Depending on the needs of actual applications, pipes can be bent into complex spatial configurations such as variable bending radius, plane axis, or spatial curve axis under the action of free pipe bending equipment. This configuration is very flexible and can effectively utilize space, making the overall component more compact, while significantly reducing the quality of the applied system. Currently, in order to process pipes of various lengths, free pipe bending equipment can only be designed based on the longest pipe length in actual application, resulting in a very long length, which in turn makes it very large in size, inconvenient to store and even more inconvenient to transport. All pipe processing must be carried out at the location of the equipment, resulting in a significant increase in time, manpower, and material costs. Currently, pipe forming is widely used, but in specific scenarios, free pipe bending equipment cannot adjust the propulsion speed of the propulsion mechanism in a timely manner according to the urgency of the task, nor can it meet the task requirements within a limited time.

[0003] Based on this, a portable free pipe bending machine device and forming method are now provided, which can eliminate the disadvantages of existing devices. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable free pipe bending machine device and forming method, which solves the problems in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A portable free pipe bending machine device includes a pipe bending body, a displacement mechanism is provided at the bottom of the pipe bending body, a bending module for bending the pipe is provided on the pipe bending body, a guide rail for guiding the pipe is provided at the feeding position of the bending module, a push rod for pushing the tail of the pipe is provided at the end of the guide rail, and the push rod is connected to the end of the multi-stage guide rail control layer. The multi-stage guide rail control layer includes at least three track layers, and the lowermost track layer is connected to the pipe bending body by bolts. The multi-stage guide rail control layer is connected to a multi-stage conveyor chain driving device for driving it to extend or shorten.

[0007] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In an optional solution: the multi-level guide rail control layer includes a lower track layer plate, a middle track layer plate and an upper track layer plate, and adjacent track layers are connected by sliding components.

[0009] In an optional solution, the sliding assembly includes a T-shaped sliding groove and a T-shaped sliding block arranged on the surfaces of adjacent track layers.

[0010] In an optional solution, the multi-stage conveyor chain driving device includes a motor arranged at the upper end of the curved pipe body, the output end of the motor is provided with a driving gear a, a gear b is rotatably provided on the curved pipe body on one side of the driving gear a, a rack is meshed on the upper side of the gear b, and the upper end of the rack is connected to the lower track layer by bolts;

[0011] A gear c and a gear d are also rotatably provided at the end of the lower track layer. A chain a is provided on the gear c, and a chain b is provided on the gear d. One end of the chain a and the chain b are connected to the bent pipe body, and the other end of the chain a and the chain b are connected to the bottom of the middle track layer.

[0012] A gear e and a gear f are also rotatably provided on the middle track layer plate. A chain c is provided on the gear e, and a chain d is provided on the gear f. One end of the chain c and the chain d are connected and fixed to the middle track layer plate, and the other end of the chain c and the chain d are connected to the upper track layer plate.

[0013] In an optional solution: the bending die set includes a bending die for bending, a movable bearing is provided at the feeding position of the bending die, and the bending die is connected to an x-axis servo motor group and a y-axis servo motor group for driving its position adjustment.

[0014] In an optional solution: the displacement mechanism includes a plurality of universal wheels arranged at the bottom of the curved pipe body, and the universal wheels are self-locking universal wheels.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This invention addresses the issues of existing equipment being bulky, inconvenient to store and transport, and the significant increase in time, manpower, and material costs associated with having to process all pipes at the equipment site. By utilizing a multi-stage telescopic guide control mechanism and a multi-stage conveyor chain forming method, this reduces the size of the equipment while meeting various practical needs. This can be achieved by flexibly adjusting the axial propulsion speed to control the forming time, thus meeting the requirements of specific scenarios requiring a limited forming time.

[0017] 2. The metal tube free bending forming method provided by the present invention is simple and feasible, with high production efficiency, and has extensive and important engineering applications and obvious economic benefits in many fields such as aerospace, automobiles and ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a portable free pipe bender;

[0019] Figure 2 for Figure 1 Schematic diagram of the middle bending die and its movement control mechanism;

[0020] Figure 3 for Figure 1 Schematic diagram of the multi-stage telescopic guide rail control mechanism;

[0021] Figure 4 for Figure 1 Detailed internal schematic diagram of the lower two layers of the multi-stage telescopic guide control mechanism a;

[0022] Figure 5 for Figure 1 Detailed internal schematic diagram of the lower two layers of the multi-stage telescopic guide control mechanism b;

[0023] Figure 6 for Figure 1 Schematic diagram of the middle guide rail;

[0024] In the figure, 1 is a bending die, 2 is a movable bearing, 3 is a guide rail, 4 is a push rod, 5 is a multi-stage conveyor chain driving device, 6 is a multi-stage guide rail control layer, 7 is an x-axis servo motor group, 8 is an y-axis servo motor group, 9 is a motor, 10 is a gear a, 11 is a gear b, 12 is a rack, 13 is a gear c, 14 is a gear d, 15 is a chain a, 16 is a chain b, 17 is a gear e, 18 is a gear f, 19 is a chain c, and 20 is a chain d;

[0025] Figure 7 Schematic diagram of the pipe prepared for Case 1;

[0026] In the figure, 21 is the first straight line segment, 22 is the first arc segment, 23 is the second straight line segment, 24 is the second arc segment, and 25 is the third straight line segment;

[0027] Figure 8 Schematic diagram of the pipe prepared for Case 2;

[0028] In the figure, 26-the third arc segment;

[0029] Figure 9 Schematic diagram of the pipe prepared for Case 3;

[0030] In the figure, 27 is the fourth straight line segment, 28 is the fourth arc segment, 29 is the fifth straight line segment, 30 is the fifth arc segment, 31 is the sixth straight line segment, 32 is the sixth arc segment, 33 is the seventh straight line segment, 34 is the seventh arc segment, and 35 is the eighth straight line segment. DETAILED DESCRIPTION

[0031] 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0032] Example: Figure 1-9 As shown, an embodiment of the present invention provides a portable free pipe bending machine device, including a pipe bending body, a displacement mechanism is provided at the bottom of the pipe bending body, a bending module for bending the pipe is provided on the pipe bending body, a guide rail 3 for guiding the pipe is provided at the feeding position of the bending module, a push rod 4 for pushing the tail of the pipe is provided at the end of the guide rail 3, and the push rod 4 is connected to the end of a multi-stage guide rail control layer 6. The multi-stage guide rail control layer 6 includes at least three track layers, and the bottom track layer is connected to the pipe bending body by bolts. The multi-stage guide rail control layer 6 is connected to a multi-stage conveyor chain driving device 5 for driving the extension or shortening thereof;

[0033] The multi-level guide rail control layer 6 includes a lower track layer plate, a middle track layer plate and an upper track layer plate, and adjacent track layers are connected by sliding components;

[0034] The multi-stage conveyor chain driving device 5 includes a motor 9 arranged at the upper end of the curved pipe body, and a driving gear a10 is provided at the output end of the motor 9. A gear b11 is provided on the curved pipe body on one side of the driving gear a10, and a rack 12 is engaged with the upper side of the gear b11. The upper end of the rack 12 is connected to the lower track layer by bolts, so that the motor 9 drives the driving gear a10 to rotate, and the driving gear a10 matches the gear b11 to drive the rack 12 to move horizontally, and the rack 12 drives the lower track layer to move in the horizontal direction;

[0035] A gear c13 and a gear d14 are also provided for rotation at the end of the lower track layer. A chain a15 is provided on the gear c13, and a chain b16 is provided on the gear d14. One end of the chain a15 and the chain b16 are connected to the curved pipe body, and the other end of the chain a15 and the chain b16 are connected to the bottom of the middle track layer. When the lower track layer moves laterally, the gear c13 and the gear d14 will move together. Since one end of the chain a15 and the chain b16 are fixed, the gear c13 and the gear d14 will rotate, and the middle track layer at the other end of the chain a15 and the chain b16 will slide further on the lower track layer.

[0036] A gear e17 and a gear f18 are also rotatably provided on the middle track plate. A chain c19 is provided on the gear e17, and a chain d20 is provided on the gear f18. One end of the chain c19 and the chain d20 are connected and fixed to the middle track plate, and the other end of the chain c19 and the chain d20 are connected to the upper track plate. When the middle track plate slides further on the lower track plate, one end of the chain c19 and the chain d20 is fixed, and the gear e17 and the gear f18 will move with the middle track plate, so the upper track plate at the other end of the chain c19 and the chain d20 will further move along the surface of the middle track plate, thereby completing the extension and retraction of the entire track, and so on.

[0037] The upper track layer is provided with a connection area for connecting the push rod 4, so that the push rod 4 can be driven to move by the push rod 4, thereby providing power for pushing the pipe;

[0038] Here, a sliding assembly is provided between the lower track layer, the middle track layer and the upper track layer. The sliding assembly includes a T-shaped slide groove and a T-shaped slider provided on the surface of adjacent track layers, thus providing a basis for the sliding of the multi-layer track plates.

[0039] The bending die set includes a bending die 1 for bending, a movable bearing 2 is provided at the feeding position of the bending die 1, and the bending die 1 is connected to an x-axis servo motor group 7 and a y-axis servo motor group 8 for driving its position adjustment. The two motor groups are used to control the movement of the bending die in the xy-axis direction to achieve different pipe forming requirements;

[0040] The displacement mechanism includes a plurality of universal wheels arranged at the bottom of the elbow body. The universal wheels are self-locking universal wheels, which facilitate the adjustment and locking of the device position.

[0041] The portable free pipe bending machine is characterized in that after freely adjusting the propulsion speed according to the urgency of the task, the forming time calculation formula is:

[0042] Straight segment:

[0043] Arc segment:

[0044] in The time required to form each small segment, The time required to adjust the speed for the same small section, is the length of the straight line segment, is the original axial propulsion speed, The axial feed speed is adjusted according to the task, is the arc segment radius, is the arc segment bending angle, △ To shape each small change time;

[0045] When doing specific operations:

[0046] 1) According to the required processing pipe length, the motor 9 drives the gear a10 to reverse, the gear a10 engages with the gear b11, and drives the gear b11 to rotate. At the same time, the gear b11 engages with the rack 12, thereby driving the rack 12 to extend backward. At the same time, the rack 12 is connected to the middle and lower track layers of the multi-level guide rail control layer 6 through bolts, thereby driving the middle and lower track layers of the multi-level guide rail control layer 6 to extend, and at the same time drives the gears c13 and d14 on the same layer to reverse, thereby driving the multi-level conveyor chain device In gear 5, chain a15 meshing with gear c13 and chain b16 meshing with gear d14 rotate. Chain a15 and chain b16 are connected to the middle track plate, thereby driving the middle track plate to move, which in turn drives gear e17 and gear f18 of the upper guide rail control layer to rotate, which in turn drives chain c19 meshing with gear e17 and chain d20 meshing with gear f18 to rotate, and so on, thereby controlling the multi-level guide rail control layer 6 and thus controlling the length of the guide rail 3 for placing pipes;

[0047] 2) Place the pipe into the equipment guide rail 3, start the motor 9, and drive the gear a10 to rotate forward. The gear a10 meshes with the gear b11, driving the gear b11 to rotate. At the same time, the gear b11 meshes with the rack 12, thereby driving the rack 12 to retract forward. At the same time, the rack 12 is connected to the lowest layer of the multi-level guide rail control layer 6 through bolts, thereby driving the lower track layer of the multi-level guide rail control layer 6 to retract, and at the same time driving the gear c13 and gear d14 on the same layer to rotate forward, and then The chain a15 meshing with the gear c and the chain b16 meshing with the gear d in the multi-stage conveyor chain driving device 5 are driven to rotate. The chain a15 and the chain b16 are connected to the middle track plate, thereby driving the middle track plate to move, and then driving the gear e17 and the gear f18 of the middle track plate to rotate, and then driving the chain c19 meshing with the gear e17 and the chain d20 meshing with the gear f18 to rotate, and so on, thereby driving the push rod 4 to push the pipe forward;

[0048] 3) The movable bearing 2 is used to drive the bending die 1 to move along a pre-set trajectory. The eccentric movement of the movable bearing 2 causes the pipe to have an eccentricity at the bent portion, thereby achieving progressive bending of the pipe. When bending at a variable bending angle, this is achieved by changing the eccentricity between the bending die 1 and the guide rail 3. During spiral bending, the bending die 1 first moves to a predetermined eccentricity in the XY plane, then moves along a partial arc as a motion trajectory, and then returns to the initial position. During spatial bending, the bending die 1 performs multiple eccentric dwell motions in the XY plane, ultimately obtaining parts with complex shapes.

[0049] Case 1:

[0050] In the first step, the multi-level guide rail control layer adjusts the guide rail length based on a titanium alloy tube with a length of 1000 mm, a diameter of 5 mm, and a wall thickness of 1 mm, and places the tube into the equipment;

[0051] In the second step, the bending die is adjusted to a circular opening with a diameter of 5.2 mm under the control of the system;

[0052] The third step is to start the motor, which drives the multi-stage conveyor chain device, and then drives the push rod to push the pipe forward;

[0053] In the fourth step, the movable bearing moves from the initial position coordinate (0, 0) to the eccentric position of (0, 100), and then drives the bending die to move in a clockwise quarter arc trajectory to achieve free bending of the pipe, and finally obtain the following Figure 5 The complex curved hollow member shown;

[0054] Original axial propulsion speed =40mm / s, the advancing speed after adjustment =80mm / s, forming time of each section;

[0055] First straight line segment 21:

[0056] First arc segment 22:

[0057] Second straight line segment 23:

[0058] Second arc segment 24:

[0059] The third straight line segment 25:

[0060] Overall forming time is reduced: =11.425s;

[0061] Case 2:

[0062] In the first step, the multi-level guide rail control layer adjusts the length of the H68 copper alloy tube with a length of 1300mm, a diameter of 10mm, and a wall thickness of 2mm to place the tube into the equipment;

[0063] In the second step, the bending die is adjusted to a circular opening with a diameter of 10.2 mm under the control of the system;

[0064] The third step is to start the motor, which drives the multi-stage conveyor chain device, and then drives the push rod to push the pipe forward;

[0065] In the fourth step, the movable bearing moves from the initial position coordinate (0, 0) to the eccentric position of (0, 20), and then drives the bending die to move in a counterclockwise one-third arc trajectory to achieve free bending of the pipe, and finally obtain the following Figure 6 The complex curved hollow member shown.

[0066] Original axial propulsion speed =40mm / s, the advancing speed after adjustment =120mm / s, forming time:

[0067] The third arc segment 26:

[0068] The overall forming time is shortened: =20.9s

[0069] Case 3

[0070] In the first step, the multi-level guide rail control layer adjusts the length of the 1060 aluminum alloy tube with a length of 1200 mm, a diameter of 15 mm, and a wall thickness of 3 mm to place the tube into the equipment.

[0071] In the second step, the bending die is adjusted to a circular opening with a diameter of 15.2 mm under the control of the system;

[0072] The third step is to start the motor, which drives the multi-stage conveyor chain device, and then drives the push rod to push the pipe forward;

[0073] In the fourth step, the movable bearing moves from the initial position coordinate (0, 0) to the eccentric position of (0, -60), and then drives the bending die to move in a counterclockwise half arc trajectory to achieve free bending of the pipe, and finally obtain the following Figure 7 The complex curved hollow member shown.

[0074] Original axial propulsion speed =40mm / s, the advancing speed after adjustment =160mm / s, forming time of each section:

[0075] Fourth straight line segment 27:

[0076] Fourth arc segment 28:

[0077] Fifth straight line segment 29:

[0078] Fifth arc segment 30:

[0079] Sixth straight line segment 31:

[0080] Sixth arc segment 32:

[0081] Seventh straight line segment 33:

[0082] Seventh arc segment 34:

[0083] Eighth straight line segment 35:

[0084] Overall forming time is reduced: =20.0775s;

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A portable free pipe bender, comprising a pipe bending body, wherein a displacement mechanism is provided at the bottom of the pipe bending body, characterized in that: The bending pipe body is provided with a bending module for bending the pipe, the bending module feeding position is provided with a guide rail (3) for guiding the pipe, the end of the guide rail (3) is provided with a push rod (4) for pushing the tail of the pipe, the push rod (4) is connected to the end of the multi-stage guide rail control layer (6), the multi-stage guide rail control layer (6) includes at least three track layers, the bottom track layer is connected to the bending pipe body by bolts, and the multi-stage guide rail control layer (6) is connected to a multi-stage conveyor chain driving device (5) for driving the extension or shortening thereof; The multi-stage conveyor chain driving device (5) includes a motor (9) arranged at the upper end of the bent pipe body, a driving gear a (10) is provided at the output end of the motor (9), a gear b (11) is rotatably provided on the bent pipe body on one side of the driving gear a (10), a rack (12) is meshed on the upper side of the gear b (11), and the upper end of the rack (12) is connected to the lower track layer plate by bolts; The end of the lower track layer is also rotatably provided with a gear c (13) and a gear d (14), the gear c (13) is matched with a chain a (15), and the gear d (14) is matched with a chain b (16), one end of the chain a (15) and the chain b (16) are connected to the bent pipe body, and the other end of the chain a (15) and the chain b (16) are connected to the bottom of the middle track layer; A gear e (17) and a gear f (18) are rotatably provided on the middle track layer. A chain c (19) is provided on the gear e (17), and a chain d (20) is provided on the gear f (18). One end of the chain c (19) and the chain d (20) are fixedly connected to the middle track layer, and the other end of the chain c (19) and the chain d (20) are connected to the upper track layer.

2. The portable free pipe bender according to claim 1, characterized in that: The multi-level guide rail control layer (6) comprises a lower track layer plate, a middle track layer plate and an upper track layer plate, and adjacent track layers are connected by sliding components.

3. The portable free pipe bender according to claim 2, characterized in that: The sliding assembly includes a T-shaped sliding groove and a T-shaped sliding block arranged on the surfaces of adjacent track layers.

4. The portable free pipe bender according to claim 1, characterized in that: The bending die set comprises a bending die (1) for bending, a movable bearing (2) is provided at a feeding position of the bending die (1), and the bending die (1) is connected to an x-axis servo motor group (7) and a y-axis servo motor group (8) for driving position adjustment thereof.

5. The portable free pipe bender according to claim 1, characterized in that: The displacement mechanism includes a plurality of universal wheels arranged at the bottom of the curved pipe body, and the universal wheels are self-locking universal wheels.

6. A forming method of the portable free pipe bender equipment according to claim 4, characterized in that: The following steps are involved: Step 1: The multi-stage guide rail control layer (6) is extended to the target length by the multi-stage conveyor chain driving device (5), so that the push rod (4) can just match the tail end of the pipe; Step 2: Place the pipe into the equipment guide rail (3), start the motor (9), and the motor (9) drives the gear a (10) to rotate forward. The gear a (10) meshes with the gear b (11), driving the gear b (11) to rotate. At the same time, the gear b (11) meshes with the rack (12) and drives the rack (12) to retract forward. At the same time, the rack (12) is connected to the middle and lower track layers of the multi-level guide rail control layer (6) through bolts, thereby driving the middle and lower track layers of the multi-level guide rail control layer (6) to retract, and at the same time drives the gear c (13) and gear d (14) on the same layer. ) rotates forward, thereby driving the chain a (15) meshed with the gear c and the chain b (16) meshed with the gear d in the multi-stage conveyor chain drive device (5) to rotate, the chain a (15) and the chain b (16) are connected to the middle track layer, thereby driving the middle track layer to move, thereby driving the gear e (17) and the gear f (18) of the middle track layer to rotate, thereby driving the chain c (19) meshed with the gear e (17) and the chain d (20) meshed with the gear f (18) to rotate, and so on, thereby driving the push rod (4) to push the pipe forward; Step 3: Using the movable bearing (2) to drive the bending die (1) to move along a pre-set trajectory, using the eccentric movement of the movable bearing (2) to generate an eccentricity in the bending portion of the pipe, thereby realizing progressive bending of the pipe. When bending at a variable bending angle, this is achieved by changing the eccentricity between the bending die (1) and the guide rail (3); when spiral bending, the bending die (1) first moves to a predetermined eccentricity in the XY plane, then moves along a partial arc as a motion trajectory, and then returns to the initial position; During the space bending, the bending die (1) performs multiple eccentric dwelling motions in the XY plane, and finally obtains a part with a complex shape.

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