Bending mechanism for pipe fitting bending machine

Abstract

The utility model belongs to the technical field of pipe bending machines, and discloses a bending mechanism for a pipe bending machine, which comprises a lower die, support plates fixed at two ends of the lower die, a support rotatably connected to the upper ends of the support plates, a first press roll rotatably connected to the upper end of the support, second press rolls arranged at two ends of the support, and connecting shafts fixed at two ends of the second press rolls. Adjusting grooves are formed in the side walls of the two ends of the support, the connecting shafts penetrate through the adjusting grooves and extend outwards to be rotationally connected with connecting rods, the lower ends of the connecting rods are rotationally connected with moving blocks, two-way lead screws are rotationally connected to the two sides of the lower end of the support, and the two moving blocks on the same side are in threaded connection to different rotating directions of the same two-way lead screw. In the bending process of the pipe fitting, the support can deflect along with the pipe fitting so as to adapt to bending of the pipe fitting, the pipe fitting at the edge of the upper end of the upper die is prevented from being bent or even broken, in the downward pressing and bending process of the pipe fitting, the two ends of the pipe fitting can move relative to the first pressing roller and the second pressing roller, and the bent part of the pipe fitting is prevented from being pulled to be thinned or even broken.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe benders, and particularly relates to a bending mechanism for a pipe bender. Background Art

[0002] In mechanical production, for the installation of some pipelines, it is necessary to adapt to the corresponding installation environment. Therefore, pipe fittings often need to be bent to be suitable for the installation position.

[0003] When the existing pipe bender bends a pipe fitting, if the punching pressure is not well controlled, it is often easy to cause problems such as wrinkling, indentation, and cracking of the pipe fitting after punching, thus affecting the use of the aluminum pipe after bending.

[0004] To solve the above problems, the patent number CN215279331U discloses a bending mechanism for a pipe bender, including an upper die. Two fixed seats are arranged on both sides of the upper die. Two groups of movable clamping plates are respectively arranged above the two fixed seats. Two bidirectional threaded rods are respectively arranged inside the two fixed seats. Two guide grooves are symmetrically opened at the top end of the fixed seat. Guide blocks are slidably sleeved inside the two guide grooves. The top end of the guide block is fixedly connected to the bottom end of the movable clamping plate. The inside of the guide block is threadedly inserted with the outside of the bidirectional threaded rod.

[0005] In the above solution, when bending a pipe fitting, the operator first places the pipe fitting to be bent on the lower die, and both sides of the pipe fitting are between the two groups of movable clamping plates. Then the operator rotates the two bidirectional threaded rods respectively. The rotation of the bidirectional threaded rods drives the two guide blocks to move towards each other. The movement of the two guide blocks drives the two movable clamping plates to move until the pipe fitting is clamped and fixed. When the upper die seat punches and bends the pipe fitting, the bent part changes from a straight line to a curve, and the total length of the bent part will be stretched, resulting in the pipe fitting being pulled and thinned, or even broken. At the same time, the pipe fitting at the position where the movable clamping plate clamps the pipe fitting and the end of the upper die will be bent, or even broken. Summary of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a bending mechanism for a pipe bender. During the bending process of the pipe fitting, the bracket will deflect accordingly to adapt to the bending of the pipe fitting, avoiding the pipe fitting at the upper edge of the upper die from being bent or even broken. At the same time, during the process of the pipe fitting being pressed and bent downward, the two ends of the pipe fitting can move relative to the first pressing roller and the second pressing roller, avoiding the bent part of the pipe fitting from being pulled and thinned or even broken.

[0007] The purpose of the utility model can be realized by the following technical solutions:

[0008] A bending mechanism for a pipe bender, comprising:

[0009] Upper die, used for bending pipe fittings;

[0010] Lower die, the lower die is located below the upper die, and both ends of the lower die are fixedly connected with support plates, and the upper ends of the support plates are rotatably connected with pipe dragging components;

[0011] The pipe dragging component includes a bracket, the middle upper end of the bracket is rotatably connected with a first pressing roller, the inner sides of both ends of the bracket are provided with second pressing rollers, both ends of the second pressing roller are fixedly connected with connecting shafts, adjusting grooves are formed on the side walls of both ends of the bracket, the connecting shafts pass through the adjusting grooves and extend outwards, the connecting shafts are rotatably connected with connecting rods, the lower ends of the connecting rods are rotatably connected with moving blocks, and both sides of the lower end of the bracket are rotatably connected with bidirectional lead screws, and the two moving blocks on the same side are threadedly connected to different rotation directions of the same bidirectional lead screw;

[0012] Drive component, the drive component is arranged on the pipe dragging component, and the drive component is jointly connected with the two bidirectional lead screws.

[0013] The above technical solution, its principle and technical effect:

[0014] Pass the pipe fitting through between the first pressing roller and the second pressing roller. At this time, the pipe fitting is located above the lower die, and both ends are inserted between the first pressing roller and the second pressing roller. Drive the two bidirectional lead screws to rotate simultaneously through the drive component, and the two moving blocks on the same bidirectional lead screw move in opposite directions. Under the linkage of the connecting rod, the second pressing roller moves upwards to cooperate with the first pressing roller to squeeze the pipe fitting and restrict the pipe fitting. When the upper die moves downwards, it first contacts the pipe fitting, and the upper die continues to move downwards and finally closes with the lower die to bend the pipe fitting. During the bending process of the pipe fitting, the bracket will deflect accordingly to adapt to the bending of the pipe fitting, avoiding the pipe fitting at the upper edge of the upper die from being bent or even broken. At the same time, during the process of the pipe fitting being pressed and bent downwards, both ends of the pipe fitting can move relative to the first pressing roller and the second pressing roller, avoiding the bent part of the pipe fitting from being pulled and thinned or even broken.

[0015] Further, a support plate is fixedly connected to the middle upper end of the bracket, and the first pressing roller is rotatably connected between the two support plates.

[0016] Further, both ends of the bidirectional lead screw are rotatably connected with ear plates, and the ear plates are fixedly connected with the bracket.

[0017] Further, sliding grooves are formed on both sides of the bracket, and sliding blocks are fixedly connected to the sides of the moving blocks, and the sliding blocks are slidably connected in the sliding grooves.

[0018] Further, the drive component includes a motor fixedly connected to the bracket, a first gear is fixedly connected to the output end of the motor, and two second gears are meshed on the periphery of the first gear, and the second gears are fixedly connected to the ends of the corresponding bidirectional lead screws.

[0019] Further, it further includes a frame, the upper end of the frame is fixedly connected with a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected with the upper die, and the lower die is fixedly connected to the lower end of the frame.

[0020] Further, the first pressing roller is the same as the second pressing roller, and the middle sections of both are concave arc structures.

[0021] Further, a upper die cavity is formed at the lower end of the upper die, and a lower die cavity adapted to the upper die cavity is formed at the upper end of the lower die.

[0022] The explanations of the nouns, conjunctions or adjectives involved in the above technical solutions are as follows:

[0023] Fixed connection means that after the parts or components are fixed, there is no relative movement connection. It is divided into two types: detachable connection and non-detachable connection.

[0024] (1) Detachable connection is to fix the parts together by using screws, splines, wedge pins, etc. This connection method can be disassembled during maintenance and will not damage the parts. However, the specifications of the connecting parts used must be correct (such as the length of bolts, keys, wedge pins), and they must be fastened properly.

[0025] (2) Non-detachable connection mainly refers to welding, riveting and mortise fitting, etc. Since it needs to be forged, sawed or oxy-cut to disassemble during maintenance or replacement, the spare parts generally cannot be used twice. At the same time, during connection, attention should be paid to process quality, technical inspection and remedial measures (such as correction, polishing, etc.).

[0026] Thread connection means a detachable connection that connects the connected parts together with threaded parts (or the threaded parts of the connected parts).

[0027] Sliding connection means that two objects are in contact but not fixed, and the two can slide relative to each other.

[0028] Rotational connection means that the connection between parts allows the parts to rotate relative to each other.

[0029] The beneficial effects of the present utility model:

[0030] During the bending process of the pipe fitting, the bracket will deflect accordingly to adapt to the bending of the pipe fitting, avoiding the pipe fitting at the upper end edge of the upper die from being bent or even broken. At the same time, during the process of the pipe fitting being pressed and bent downward, the two ends of the pipe fitting can move relative to the first pressing roller and the second pressing roller, avoiding the bent part of the pipe fitting from being pulled and thinned or even broken. Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 is the overall structural schematic diagram of the embodiment of the present invention;

[0033] Figure 2 is the structural schematic diagram of the mold of the embodiment of the present invention;

[0034] Figure 3 is the structural schematic diagram of the pipe dragging assembly of the embodiment of the present invention;

[0035] Figure 4 is the structural schematic diagram of the bracket of the embodiment of the present invention. Detailed implementation manners

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0038] According to the concept of the present application, herein in combination with Figures 1 to 4To describe an embodiment of a bending mechanism for a pipe fitting bending machine. Specifically, the bending mechanism for the pipe fitting bending machine is configured as a split structure, which has components such as an upper die 1, a lower die 2, a pipe dragging assembly 4, and a driving assembly 5. Through the mutual cooperation of structures such as the first pressing roller 42 and the second pressing roller 43 provided, the pipe fitting passes between the first pressing roller 42 and the second pressing roller 43. At this time, the pipe fitting is located above the lower die 2, and both ends are inserted between the first pressing roller 42 and the second pressing roller 43. By driving the two bidirectional lead screws 49 to rotate simultaneously by the driving assembly 5, the two moving blocks 48 on the same bidirectional lead screw 49 move in opposite directions. Under the linkage action of the connecting rod 47, the second pressing roller 43 moves upward to cooperate with the first pressing roller 42 to squeeze the pipe fitting and restrict the pipe fitting. When the upper die 1 moves downward, it first contacts the pipe fitting, and the upper die 1 continues to move downward and finally closes with the lower die 2 to bend the pipe fitting. During the bending process of the pipe fitting, the bracket 41 will deflect accordingly to adapt to the bending of the pipe fitting, avoiding the pipe fitting at the upper end edge of the upper die 1 from being bent or even broken. At the same time, during the process of the pipe fitting being pressed and bent downward, both ends of the pipe fitting can move relative to the first pressing roller 42 and the second pressing roller 43, avoiding the bent part of the pipe fitting from being pulled and thinned or even broken.

[0039] As Figures 1-4 shown, the bending mechanism for a pipe fitting bending machine includes:

[0040] An upper die 1 for bending the pipe fitting;

[0041] A lower die 2, the lower die 2 is located below the upper die 1, and both ends of the lower die 2 are fixedly connected with support plates 3. The upper ends of the support plates 3 are rotatably connected with a pipe dragging assembly 4;

[0042] The pipe dragging assembly 4 includes a bracket 41. The middle upper end of the bracket 41 is rotatably connected with a first pressing roller 42. The inner sides of both ends of the bracket 41 are provided with second pressing rollers 43. Both ends of the second pressing roller 43 are fixedly connected with a connecting shaft 44. Adjusting grooves 45 are opened on the side walls of both ends of the bracket 41. The connecting shaft 44 passes through the adjusting groove 45 and extends outward. A connecting rod 47 is rotatably connected to the connecting shaft 44. The lower end of the connecting rod 47 is rotatably connected with a moving block 48. Both sides of the lower end of the bracket 41 are rotatably connected with bidirectional lead screws 49. The two moving blocks 48 on the same side are threadedly connected to different threads of the same bidirectional lead screw 49;

[0043] A driving assembly 5, the driving assembly 5 is arranged on the pipe dragging assembly 4, and the driving assembly 5 is commonly connected with the two bidirectional lead screws 49.

[0044] During use, the pipe fitting is passed through between the first pressure roller 42 and the second pressure roller 43. At this time, the pipe fitting is located above the lower mold 2, and both ends are inserted between the first pressure roller 42 and the second pressure roller 43. By driving the assembly 5 to drive the two bidirectional lead screws 49 to rotate simultaneously, the two moving blocks 48 on the same bidirectional lead screw 49 move in opposite directions. Under the linkage action of the connecting rod 47, the second pressure roller 43 moves upward to cooperate with the first pressure roller 42 to squeeze the pipe fitting and restrict the pipe fitting. When the upper mold 1 moves downward, it first contacts the pipe fitting, and the upper mold 1 continues to move downward and finally closes with the lower mold 2 to bend the pipe fitting. During the bending process of the pipe fitting, the bracket 41 will deflect accordingly to adapt to the bending of the pipe fitting, avoiding the pipe fitting at the upper end edge of the upper mold 1 from being bent or even broken. At the same time, during the process of the pipe fitting being pressed and bent downward, both ends of the pipe fitting can move relative to the first pressure roller 42 and the second pressure roller 43, avoiding the bent part of the pipe fitting from being pulled and thinned or even broken.

[0045] In an embodiment of the present utility model, a support plate 411 is fixedly connected to the middle upper end of the bracket 41, and the first pressure roller 42 is rotatably connected between the two support plates 411. A gap is left between the first pressure roller 42 and the second pressure roller 43 for the pipe fitting to pass through.

[0046] In an embodiment of the present utility model, ear plates 412 are rotatably connected to both ends of the bidirectional lead screw 49, and the ear plates 412 are fixedly connected to the bracket 41. It is used to support the bidirectional lead screw 49.

[0047] In an embodiment of the present utility model, sliding grooves 413 are provided on both sides of the bracket 41, and sliding blocks 481 are fixedly connected to the side surfaces of the moving blocks 48. The sliding blocks 481 are slidably connected in the sliding grooves 413. It improves the stability of the movement of the moving blocks 48.

[0048] In an embodiment of the present utility model, the driving assembly 5 includes a motor 51 fixedly connected to the bracket 41. The output end of the motor 51 is fixedly connected with a first gear 52. Two second gears 53 are meshed on the circumferential side of the first gear 52, and the second gears 53 are fixedly connected to the ends of the corresponding bidirectional lead screws 49. The motor 51 drives the first gear 52 to rotate, the first gear 52 drives the two second gears 53 to rotate, and the second gears 53 drive the bidirectional lead screws 49 to rotate.

[0049] In an embodiment of the present utility model, it further includes a frame 6. A hydraulic cylinder 7 is fixedly connected to the upper end of the frame 6. The output end of the hydraulic cylinder 7 is fixedly connected with the upper mold 1, and the lower mold 2 is fixedly connected to the lower end of the frame 6. The hydraulic rod of the hydraulic cylinder 7 extends to drive the upper mold 1 to move downward to stamp and bend the pipe fitting.

[0050] In an embodiment of the present utility model, the first pressure roller 42 is the same as the second pressure roller 43, and the middle sections of both are concave arc structures. It is suitable for the pipe fitting to pass through.

[0051] In an embodiment of the present utility model, a lower end of the upper die 1 is provided with an upper die cavity 11, and an upper end of the lower die 2 is provided with a lower die cavity 21 adapted to the upper die cavity 11, preventing the pipe fitting from being flattened.

[0052] The following further describes the bending mechanism for a pipe fitting bending machine provided by the present utility model in conjunction with the accompanying drawings and embodiments.

[0053] The bending mechanism for a pipe fitting bending machine includes:

[0054] An upper die 1 for bending the pipe fitting;

[0055] A lower die 2, the lower die 2 is located below the upper die 1, and two ends of the lower die 2 are fixedly connected with support plates 3. A pipe dragging component 4 is rotatably connected to the upper ends of the support plates 3;

[0056] The pipe dragging component 4 includes a bracket 41. A first pressing roller 42 is rotatably connected to the middle upper end of the bracket 41. Second pressing rollers 43 are arranged on the inner sides of both ends of the bracket 41. Both ends of the second pressing roller 43 are fixedly connected with connecting shafts 44. Adjusting grooves 45 are formed on the side walls of both ends of the bracket 41. The connecting shafts 44 pass through the adjusting grooves 45 and extend outward. A connecting rod 47 is rotatably connected to the connecting shafts 44. A moving block 48 is rotatably connected to the lower end of the connecting rod 47. A bidirectional lead screw 49 is rotatably connected to both sides of the lower end of the bracket 41. Two moving blocks 48 on the same side are threadedly connected to different threads of the same bidirectional lead screw 49;

[0057] A driving component 5, the driving component 5 is arranged on the pipe dragging component 4, and the driving component 5 is jointly connected with the two bidirectional lead screws 49.

[0058] A support plate 411 is fixedly connected to the middle upper end of the bracket 41, and the first pressing roller 42 is rotatably connected between the two support plates 411.

[0059] Both ends of the bidirectional lead screw 49 are rotatably connected with ear plates 412, and the ear plates 412 are fixedly connected with the bracket 41.

[0060] Chute grooves 413 are formed on both sides of the bracket 41. A slider 481 is fixedly connected to the side surface of the moving block 48, and the slider 481 is slidably connected in the chute grooves 413.

[0061] The driving component 5 includes a motor 51 fixedly connected to the bracket 41. An output end of the motor 51 is fixedly connected with a first gear 52. Two second gears 53 are meshed with the circumferential side of the first gear 52, and the second gears 53 are fixedly connected to the ends of the corresponding bidirectional lead screws 49.

[0062] It further includes a frame 6. An upper end of the frame 6 is fixedly connected with a hydraulic cylinder 7. An output end of the hydraulic cylinder 7 is fixedly connected with the upper die 1, and the lower die 2 is fixedly connected to the lower end of the frame 6.

[0063] The first pressing roller 42 is the same as the second pressing roller 43, and the middle sections of both are concave arc structures.

[0064] A upper die cavity 11 is provided at the lower end of the upper die 1, and a lower die cavity 21 adapted to the upper die cavity 11 is provided at the upper end of the lower die 2.

[0065] In the description of this specification, the descriptions with reference to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A bending mechanism for a pipe bending machine, characterized in that: include: An upper die (1) is used for bending the pipe; A lower mold (2), the lower mold (2) is located below the upper mold (1), both ends of the lower mold (2) are fixedly connected to support plates (3), and the upper end of the support plate (3) is rotatably connected to a drag tube assembly (4); The tube dragging assembly (4) comprises a bracket (41), the middle upper end of the bracket (41) is rotatably connected to a first pressing roller (42), the inner sides of the two ends of the bracket (41) are provided with second pressing rollers (43), the two ends of the second pressing roller (43) are fixedly connected to a connecting shaft (44), the side walls of the two ends of the bracket (41) are provided with adjustment grooves (45), the connecting shaft (44) passes through the adjustment groove (45) and extends outward, the connecting shaft (44) is rotatably connected to a connecting rod (47), the lower end of the connecting rod (47) is rotatably connected to a moving block (48), the two sides of the lower end of the bracket (41) are rotatably connected to a bidirectional lead screw (49), and the two moving blocks (48) on the same side are threadedly connected to the same bidirectional lead screw (49) in different rotation directions; A driving assembly (5), wherein the driving assembly (5) is arranged on the drag tube assembly (4), and the driving assembly (5) is connected to two bidirectional lead screws (49).

2. The bending mechanism for a pipe bending machine according to claim 1, characterized in that: A support plate (411) is fixedly connected to the middle upper end of the bracket (41), and the first pressing roller (42) is rotatably connected between the two support plates (411).

3. The bending mechanism for a pipe bending machine according to claim 2, characterized in that: Both ends of the bidirectional lead screw (49) are rotatably connected to ear plates (412), and the ear plates (412) are fixedly connected to the bracket (41).

4. The bending mechanism for a pipe bending machine according to claim 3, characterized in that: Slide grooves (413) are provided on both sides of the bracket (41), and a sliding block (481) is fixedly connected to the side of the moving block (48), and the sliding block (481) is slidably connected in the slide groove (413).

5. The bending mechanism for a pipe bending machine according to claim 4, characterized in that: The driving assembly (5) comprises a motor (51) fixedly connected to a bracket (41), the output end of the motor (51) being fixedly connected to a first gear (52), the circumferential side of the first gear (52) being meshed with two second gears (53), and the second gears (53) being fixedly connected to the ends of the corresponding bidirectional lead screw (49).

6. The bending mechanism for a pipe bending machine according to claim 5, characterized in that: It also comprises a frame (6), the upper end of the frame (6) is fixedly connected to a hydraulic cylinder (7), the output end of the hydraulic cylinder (7) is fixedly connected to the upper mold (1), and the lower mold (2) is fixedly connected to the lower end of the frame (6).

7. The bending mechanism for a pipe bending machine according to claim 1, characterized in that: The first pressing roller (42) is identical to the second pressing roller (43), and the middle sections of both are of an inwardly concave arc structure.

8. The bending mechanism for a pipe bending machine according to claim 1, characterized in that: An upper mold cavity (11) is formed at the lower end of the upper mold (1), and a lower mold cavity (21) adapted to the upper mold cavity (11) is formed at the upper end of the lower mold (2).

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