Butt joint device for bent pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment

Abstract

The present invention relates to a docking device for bent pipe parts, specifically a docking device for bent pipe parts based on two degrees of freedom limiting four degrees of freedom adjustment, wherein the side shift plate and the feed plate are respectively slidably connected to the workbench in the main frame part, the fixed positioning plate is located above the side shift plate, one side of the fixed positioning plate is hinged to the side shift plate, and the other side is threadedly connected with a swing adjustment screw, and the lower end of the swing adjustment screw abuts against the side shift plate; the screw assembly is installed on the main frame part; a screw lift is installed on the feed plate, the output end of the screw lift is connected to the lifting plate, the dynamic positioning plate is fixed on the lifting plate, and another bent pipe to be docked is installed on the dynamic positioning plate. The present invention can effectively constrain the two degrees of freedom of pitch and rotation along the positioning axis of the docked large bent pipe parts, accurately adjust the four degrees of freedom such as the relative height and misalignment of the docking center line, the relative distance of the docking surfaces, etc., and the device has outstanding characteristics, convenient adjustment, and high positioning accuracy.

Description

Technical Field

[0001] The invention relates to a butt joint device for bent pipe parts, in particular to a butt joint device for bent pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment, which can be used for butt joint connection of large and heavy bent pipe parts with assembly accuracy requirements. Background Art

[0002] With the continuous improvement of the country's comprehensive national strength, in recent years, the country has increased its research and development efforts in the field of aerospace military industry, and new models and models have continued to appear, which has led to higher and higher assembly requirements for aerospace military products. Large and heavy-duty bent pipe parts are widely used in aerospace military products. They are large in size, heavy in weight, and have strict docking precision requirements. They are one of the key points of the assembly operation of related products.

[0003] For the assembly of large-scale bent pipe parts, the traditional working form is that the operator uses an overhead crane and simple tools to perform docking and assembly. The entire assembly process has extremely high requirements on the operator's physical strength, technical experience and working status. In addition, since large-scale bent pipe parts are heavy, they are difficult to adjust after hoisting due to their large inertia, and there is a risk of collision between the operator and the product during the operation. There are many shortcomings such as low operating efficiency, large consumption of labor and safety hazards. Summary of the invention

[0004] In view of a series of problems existing in the assembly of the above-mentioned large-scale bent pipe parts, such as low efficiency, heavy physical labor, potential safety hazards and failure to ensure assembly quality, the purpose of the present invention is to provide a docking device for bent pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] The present invention comprises a side shift swing adjustment part, a lifting and feeding part and a main frame part, wherein the side shift swing adjustment part comprises a fixed positioning plate, a side shift plate, a swing adjustment screw and a screw assembly, the lifting and feeding part comprises a dynamic positioning plate, a lifting plate, a screw lift, a lifting crank and a feed plate, the side shift plate and the feed plate are respectively slidably connected with the working table plate in the main frame part, the fixed positioning plate is located above the side shift plate, one side of the fixed positioning plate is hinged to the side shift plate, and the other side of the fixed positioning plate is threadedly connected with a swing adjustment screw, the lower end of the swing adjustment screw abuts against the side shift plate, and the docking angle of a bent pipe to be docked installed on the fixed positioning plate is adjusted by screwing the swing adjustment screw; the screw assembly is installed on the main frame part, and is used to drive the side shift plate, the fixed positioning plate and the swing adjustment screw to shift sideways; a screw lift is installed on the feed plate, and the output end of the screw lift is connected to the lifting plate, the dynamic positioning plate is fixed on the lifting plate, and another bent pipe to be docked is installed on the dynamic positioning plate.

[0007] Wherein: the lateral shift swing adjustment part and the lifting and feeding part are respectively located on both sides of the worktable plate, and the sliding direction of the lateral shift plate is perpendicular to the sliding direction of the feeding plate.

[0008] A push pad is installed at a position on the side shift plate corresponding to the swing adjustment screw threadedly connected to the other side of the fixed positioning plate. The lower end of the swing adjustment screw is arc-shaped and abuts against the push pad.

[0009] A connecting plate is provided on the same side of the side shifting plate and one side of the fixed positioning plate. One side of the fixed positioning plate is hinged to the connecting plate through a connecting pin and is fixed by a nut.

[0010] A lateral linear guide rail is installed on the work table, a lateral linear guide rail slider is fixedly connected to the bottom surface of the lateral plate, and the lateral linear guide rail slider is slidably connected to the lateral linear guide rail.

[0011] The screw assembly includes a screw, a screw nut, a screw nut sleeve, a screw support and a side-shift crank. The screw support is fixedly connected to the bottom surface of the worktable, and the screw is rotatably installed on the screw support. One end of the screw is connected to the side-shift crank, the upper end of the screw nut sleeve is fixedly connected to the side-shift plate, and the lower end of the screw nut sleeve is equipped with a screw nut threadedly connected to the screw.

[0012] The lifting plate is also fixedly connected with a lifting guide shaft, and a linear bearing is installed on the feed plate, and the lifting guide shaft passes through the linear bearing.

[0013] The base of the screw lift is installed on the top surface of the feed plate, and the lifting piece at the output end of the screw lift is connected to the bottom surface of the lifting plate. A lifting handle is installed on the extended rocking shaft of the screw lift.

[0014] A feed linear guide rail is installed on the work table, a feed linear guide rail slider is fixedly connected to the bottom surface of the feed plate, and the feed linear guide rail slider is slidably connected to the feed linear guide rail.

[0015] The main frame part includes a workbench, a main frame and feet. The workbench is fixedly installed on the top of the main frame, and the bottom of the main frame is connected to a plurality of feet. The positions on the workbench corresponding to the lateral shift swing adjustment part and the lifting and feeding part are hollow structures.

[0016] The advantages and positive effects of the present invention are:

[0017] 1. The present invention has a clear structure and is easy to adjust, which can effectively improve work efficiency and operation quality.

[0018] 2. The present invention avoids unnecessary design and integrates multiple functions into the same mechanism while meeting the process requirements and mechanical properties, thereby reducing the manufacturing cost.

[0019] 3. The design structure of the present invention is simple and reasonable, ensuring that the functions are achieved without any redundant structures.

[0020] 4. The present invention can adjust multiple conditions such as docking distance, docking angle, docking height, etc. to meet the docking accuracy.

[0021] 5. The present invention can greatly save the operator's physical labor and the operating experience requirements of the operator, realize efficient and convenient high-precision adjustment, and complete the final docking connection operation based on this. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural front view of the present invention;

[0024] Figure 3 It is a left view of the structure of the present invention;

[0025] Figure 4 It is a top view of the structure of the present invention;

[0026] Figure 5 for Figure 2 D-D section view in;

[0027] Among them: A is the side shift swing adjustment part, B is the lifting and feeding part, and C is the main frame part;

[0028] 1 is a fixed positioning plate, 2 is a side shift plate, 3 is a connecting pin, 4 is a swing adjustment screw, 5 is a top pad, 6 is a connecting plate, 7 is a side shift linear guide slider, 8 is a dynamic positioning plate, 9 is a lifting plate, 10 is a lifting guide shaft, 11 is a screw lift, 12 is a lifting handle, 13 is a linear bearing, 14 is a feed plate, 15 is a feed linear guide slider, 16 is a work table, 17 is a side shift linear guide, 18 is a feed linear guide, 19 is a main frame, 20 is a foot, 21 is a screw, 22 is a screw nut, 23 is a screw nut sleeve, 24 is a screw support, and 25 is a side shift handle. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] The present invention is fixedly installed on the floor of the workshop. When in use, the operator places two large curved pipes to be butt-jointed on two positioning mechanisms of the butt-jointing device (i.e., the lateral swing adjustment part A and the lifting and feeding part B), respectively. Figure 1 shown.

[0031] like Figures 1 to 5 As shown, the present invention includes a lateral shift swing adjustment part A, a lifting and feeding part B and a main frame part C, wherein the lateral shift swing adjustment part A includes a fixed positioning plate 1, a lateral shift plate 2, a swing adjustment screw 4 and a screw assembly, the lateral shift plate 2 is slidably connected to the workbench 16 in the main frame part C, the fixed positioning plate 1 is located above the lateral shift plate 2, one side of the fixed positioning plate 1 is hinged to the lateral shift plate 2, and the other side of the fixed positioning plate 1 is threadedly connected with the swing adjustment screw 4, the lower end of the swing adjustment screw 4 is in contact with the lateral shift plate 2, and the docking angle of a large curved pipe to be docked installed on the fixed positioning plate 1 is adjusted by screwing the swing adjustment screw 4; the screw assembly is installed on the main frame part C, and is used to drive the lateral shift of the lateral shift plate 2, the fixed positioning plate 1 and the swing adjustment screw 4. The lifting and feeding part B includes a dynamic positioning plate 8, a lifting plate 9, a screw lift 11, a lifting handle 12 and a feed plate 14. The feed plate 14 is slidably connected to the workbench 16 in the main frame part C. The screw lift 11 is installed on the feed plate 14. The output end of the screw lift 11 is connected to the lifting plate 9. The dynamic positioning plate 8 is fixed to the top surface of the lifting plate 9 by bolts. Another large curved pipe to be connected is installed on the dynamic positioning plate 8.

[0032] The side shift swing adjustment part A and the lifting feed part B of this embodiment are respectively located on both sides of the work table 16, and the sliding direction of the side shift plate 2 (i.e. the width direction of the work table 16) is perpendicular to the sliding direction of the feed plate 14 (i.e. the length direction of the work table 16).

[0033] In this embodiment, two connecting plates 6 are provided on the same side of the side shift plate 2 and the fixed positioning plate 1. One side of the fixed positioning plate 1 is hinged to the two connecting plates 6 through two connecting pins 3 and fixed by nuts. A jacking pad 5 is installed by bolts at the position corresponding to the swing adjustment screw 4 threadedly connected to the other side of the fixed positioning plate 1 on the side shift plate 2. The lower end of the swing adjustment screw 4 is arc-shaped. The swing adjustment screw 4 is screwed through the corresponding screw hole on the other side of the fixed positioning plate 1, and the lower end is in contact with the jacking pad 5. The angular rotation that affects the docking accuracy is adjusted by threaded jacking, so that the docking angle is accurately guaranteed.

[0034] In this embodiment, two parallel lateral linear guide rails 17 are installed on the workbench 16 along the width direction. Two groups of four lateral linear guide rail sliders 7 are fixed to the bottom surface of the lateral plate 2 by bolts. Each group of two lateral linear guide rail sliders 7 is slidably connected to one lateral linear guide rail 17.

[0035] The screw assembly of this embodiment includes a screw 21, a screw nut 22, a screw nut sleeve 23, a screw support 24 and a side shift handle 25. The screw support 24 is fixed to the bottom surface of the workbench 16 by bolts, the screw 21 is rotatably mounted on the screw support 24, one end of the screw 21 is connected to the side shift handle 25, the upper end of the screw nut sleeve 23 is fixed to the bottom surface of the side shift plate 2 by bolts, the screw nut 22 is inserted into and installed in the hole at the lower end of the screw nut sleeve 23, the screw nut 22 passes through the screw 21 and is threadedly connected to the screw 21. The screw 21 of this embodiment is a commercially available product, purchased from the DTK brand ball screw, so that the misalignment of the docking axis is accurately guaranteed; the screw support 24 of this embodiment is a commercially available product, purchased from the BUN brand ball screw support, model EK15-C5.

[0036] The base of the screw lift 11 of this embodiment is installed on the top surface of the feed plate 14, and the lifting piece as the output end of the screw lift 11 is connected to the bottom surface of the lifting plate 9 by bolts, and the lifting handle 12 is installed on the extended rocking shaft of the screw lift 11. The bottom surface of the lifting plate 9 is also fixed with a lifting guide shaft 10, and a linear bearing 13 is installed on the feed plate 14 by bolts, and the lifting guide shaft 10 passes through the linear bearing 13. The screw lift 11 of this embodiment is a prior art and will not be described in detail here.

[0037] In this embodiment, two parallel feed linear guide rails 18 are installed on the work table 16 along the length direction. Two groups of four feed linear guide sliders 15 are fixed to the bottom surface of the feed plate 14 by bolts. Each group of two feed linear guide sliders 15 is slidably connected to one feed linear guide rail 18.

[0038] The main frame part C of this embodiment includes a workbench 16, a main frame 19 and a foot 20. The workbench 16 is fixedly installed on the top of the main frame 19 by bolts, and a plurality of foots 20 are connected to the bottom of the main frame 19. The foots 20 of this embodiment are prior art, and the screws of the foots 20 are screwed into the corresponding screw holes of the four pillars of the main frame 19 and locked by nuts. The positions on the workbench 16 corresponding to the lateral swing adjustment part A and the lifting and feeding part B are hollow structures.

[0039] The docking process of the present invention is as follows:

[0040] (1) The operator installs two large elbows to be butt-jointed and assembled on the fixed positioning plate 1 and the dynamic positioning plate 8 respectively, and positions them respectively;

[0041] (2) The operator pushes the movable positioning plate 8 to move the movable positioning plate 8 along the feed linear guide rail 18, so that the large curved pipe on one side approaches the large curved pipe on the other side;

[0042] (3) The operator observes the posture and position of the two large elbows;

[0043] (4) According to the observation results, the operator manually rotates the side shift crank 25, which is transformed into a moving pair for the side shift plate 2 to slide along the side shift linear guide 17 through the screw pair of the lead screw 21 and the lead screw nut 22, thereby adjusting the side shift position of the large elbow on the positioning plate 1;

[0044] (5) Based on the observation results, the operator manually adjusts the lifting handle 12 to adjust the upper and lower height positions of the large curved pipe on the dynamic positioning plate 8;

[0045] (6) Based on the observation results, the operator manually adjusts the swing adjustment screw 4 to adjust the posture of the large elbow on the positioning plate 1;

[0046] (7) Repeat steps (4) to (6) based on the observation results, and finally achieve the relative position accuracy of the two large elbows;

[0047] (8) The operator pushes the positioning plate 8 to completely connect the two large curved pipes;

[0048] (9) The operator assembles the two large elbows that have been butt-joined by bolting;

[0049] (10) The operator removes the docking device from the two large bent pipe assemblies that have been butt-connected and assembled, completes the work of the docking device, and restores the various parts of the docking device to their initial postures, waiting for the next operation to proceed.

[0050] The present invention is a floor-standing device as a whole, and is an independent device. In order to meet the docking and assembly of two large curved pipe parts, two positioning mechanisms are designed, namely, the side shift swing adjustment part A and the lifting and feeding part B.

[0051] In order to meet the requirements of multiple degrees of freedom for precise docking, the present invention allocates multiple degrees of freedom to the lateral shift swing adjustment part A and the lifting and feeding part B. The lateral shift swing adjustment part A realizes the positioning of a large-scale curved pipe component, and constrains the degrees of freedom of the positioning axis rotation, the docking axis rotation, the positioning axis direction and the lateral shift axis rotation, and the design allocates the lateral shift degree of freedom and the remaining rotation degree of freedom. The lifting and feeding part B realizes the positioning of another large-scale curved pipe component, and constrains three rotation degrees of freedom (i.e., the positioning axis rotation, the docking axis rotation, the positioning axis direction and the lateral shift axis rotation) and the lateral shift degree of freedom, and the design allocates the movement degree of freedom in the docking feed direction and the lifting degree of freedom in the positioning axis direction.

[0052] The lateral shift swing adjustment part A and the lifting and feeding part B of the present invention are linked to realize the rotational freedom of the positioning axis direction and the lateral shift axis direction during the docking process, and realize the adjustment of the three linear movement degrees of freedom and the rotational freedom of the docking axis direction. Each degree of freedom is designed with an adjustment mechanism, which can be convenient for the operator to adjust without large force; such as the swing adjustment screw 4 and the screw assembly in the lateral shift swing adjustment part A, and the lifting handle 12 in the lifting and feeding part B.

[0053] The fixed positioning plate 1 and the dynamic positioning plate 8 of the present invention are both provided with positioning pins, which can not only realize the freedom constraint of large-scale bent pipe components, but also realize the precise positioning of large-scale bent pipe components to ensure the correct docking direction.

[0054] The present invention adopts a linear guide motion guide for docking movement, and the operator can adjust the docking movement state and position control at any time according to actual conditions while ensuring the movement accuracy.

[0055] The present invention can perform high-efficiency, high-safety, and high-quality assembly of large-profile, large-mass large-bend pipe parts. After the operator positions the large and heavy-duty bent pipe parts on the docking device, the operator can conveniently and easily operate the mechanism in the docking device to achieve multi-degree-of-freedom adjustment, and finally complete the efficient, high-quality, and high-precision docking connection work of the large bent pipe parts.

Claims

1. A device for butt jointing pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment, characterized in that: The invention comprises a side shift swing adjustment part (A), a lifting and feeding part (B) and a main frame part (C), wherein the side shift swing adjustment part (A) comprises a fixed positioning plate (1), a side shift plate (2), a swing adjustment screw (4) and a screw assembly, and the lifting and feeding part (B) comprises a dynamic positioning plate (8), a lifting plate (9), a screw lifter (11), a lifting crank (12) and a feeding plate (14), wherein the side shift plate (2) and the feeding plate (14) are respectively slidably connected to a workbench (16) in the main frame part (C), wherein the fixed positioning plate (1) is located above the side shift plate (2), and one side of the fixed positioning plate (1) is hinged to the side shift plate (2), and the fixed positioning plate (1) The other side of the screw is threadedly connected with a swing adjustment screw (4), the lower end of which is in contact with the side shift plate (2), and the docking angle of a bend pipe to be docked installed on the fixed positioning plate (1) is adjusted by screwing the swing adjustment screw (4); the screw assembly is installed on the main frame part (C) and is used to drive the side shift plate (2), the fixed positioning plate (1) and the swing adjustment screw (4) to move sideways; a screw lift (11) is installed on the feed plate (14), the output end of the screw lift (11) is connected to the lifting plate (9), the dynamic positioning plate (8) is fixed on the lifting plate (9), and another bend pipe to be docked is installed on the dynamic positioning plate (8).

2. According to claim 1, the device for butt jointing of bent pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment is characterized in that: The side shift swing adjustment part (A) and the lifting feed part (B) are respectively located on both sides of the workbench plate (16), and the sliding direction of the side shift plate (2) is perpendicular to the sliding direction of the feed plate (14).

3. According to claim 1, the device for butt jointing of bent pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment is characterized in that: A push pad (5) is installed on the side shift plate (2) at a position corresponding to the swing adjustment screw (4) threadedly connected to the other side of the fixed positioning plate (1); the lower end of the swing adjustment screw (4) is arc-shaped and abuts against the push pad (5).

4. According to claim 1, the device for butt jointing of bent pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment is characterized in that: A connecting plate (6) is provided on the same side of the side shifting plate (2) and the fixed positioning plate (1); one side of the fixed positioning plate (1) is hinged to the connecting plate (6) via a connecting pin (3) and is fixed via a nut.

5. According to claim 1, the device for butting elbow parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment is characterized in that: A lateral linear guide rail (17) is installed on the workbench (16), a lateral linear guide rail slider (7) is fixedly connected to the bottom surface of the lateral plate (2), and the lateral linear guide rail slider (7) is slidably connected to the lateral linear guide rail (17).

6. According to claim 1, the device for butt jointing of bent pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment is characterized in that: The screw assembly comprises a screw (21), a screw nut (22), a screw nut sleeve (23), a screw support (24) and a side shift handle (25); the screw support (24) is fixedly connected to the bottom surface of the workbench (16); the screw (21) is rotatably mounted on the screw support (24); one end of the screw (21) is connected to the side shift handle (25); the upper end of the screw nut sleeve (23) is fixedly connected to the side shift plate (2); and the lower end of the screw nut sleeve (23) is provided with a screw nut (22) threadedly connected to the screw (21).

7. The device for butt jointing pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment according to claim 1 is characterized in that: The lifting plate (9) is also fixedly connected with a lifting guide shaft (10), and a linear bearing (13) is installed on the feed plate (14), and the lifting guide shaft (10) passes through the linear bearing (13).

8. The device for butt jointing pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment according to claim 1 is characterized in that: The base of the screw lift (11) is installed on the top surface of the feed plate (14), and the lifting member at the output end of the screw lift (11) is connected to the bottom surface of the lifting plate (9). A lifting handle (12) is installed on the extended shaking shaft of the screw lift (11).

9. The device for butt jointing pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment according to claim 1, characterized in that: A feed linear guide rail (18) is installed on the work table (16), a feed linear guide rail slider (15) is fixedly connected to the bottom surface of the feed plate (14), and the feed linear guide rail slider (15) is slidably connected to the feed linear guide rail (18).

10. The device for butt jointing pipe parts based on two-degree-of-freedom restriction and four-degree-of-freedom adjustment according to claim 1, characterized in that: The main frame part (C) includes a workbench (16), a main frame (19) and feet (20); the workbench (16) is fixedly installed on the top of the main frame (19), and the bottom of the main frame (19) is connected to a plurality of feet (20); the positions on the workbench (16) corresponding to the lateral shift swing adjustment part (A) and the lifting and feeding part (B) are hollow structures.

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