Small bent pipe bending mechanism

Abstract

The utility model relates to a trumpet bent pipe bending mechanism. The technical problem that an existing bent pipe is unreasonable in bending design is solved. The small-size bent pipe bending mechanism comprises a base, a positioning guide block is arranged at the upper end of the base, a bending fixing block is arranged on one side of the positioning guide block, and a fixing forming groove is formed in the bending fixing block in the circumferential direction; the end positioning assembly comprises a fixing seat, a horizontal adjusting rod and an arc-shaped limiting block, the fixing seat and the bending fixing block are arranged at an interval, the horizontal adjusting rod is arranged on the fixing seat in a penetrating mode, one end of the horizontal adjusting rod extends to the bending fixing block, and the arc-shaped limiting block is arranged on the horizontal adjusting rod, is close to the bending fixing block and corresponds to the fixing forming groove; the bending assembly comprises a rotating structure rotating along the axis of the bending fixing block and a movable forming roller detachably connected to the rotating structure. According to the small-sized bent pipe bending mechanism, bending of the middle section of a machined straight pipe is completed, meanwhile, the machined pipe body is prevented from being damaged, and the bent pipe bending effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of small-sized bending and relates to a small-sized curved pipe bending mechanism. Background Art

[0002] For example, a Chinese patent document discloses a multi-directional bending pipe bending device [202111604403.3], including a driving mechanism, a bending mechanism connected to the driving mechanism, and a clamping mechanism connected to the bending mechanism; the bending mechanism includes a pipe bending die, and a retracting and expanding assembly arranged inside the pipe bending die; the pipe bending die is a hollow structure; the diameter of the pipe bending die gradually decreases from one end to the other end; a plurality of pipe bending grooves are provided on the outer wall of the pipe bending die; four openings are provided on the pipe bending die to divide the pipe bending die into four sub-bending dies; the angle between two of the four openings is 90°; the retracting and expanding assembly includes two connecting heads arranged inside the pipe bending die, a connecting rod connected between the two connecting heads, and four telescopic parts connected to the connecting heads.

[0003] The defects of the above technical solution are: the bending angle of the bent pipe cannot be controlled, and the fitting restriction of the bent pipe during the bending process is poor, resulting in poor bending effect. Utility Model Content

[0004] The purpose of the utility model is to provide a small-sized pipe bending mechanism in view of the above-mentioned problems existing in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The small tube bending mechanism comprises:

[0007] A base, with a positioning guide block at the upper end, a bending fixing block at one side of the positioning guide block, and a fixed forming groove is provided in the circumference of the bending fixing block;

[0008] The end positioning assembly comprises a fixing seat spaced apart from the bending fixing block, a horizontal adjustment rod passing through the fixing seat and extending one end toward the bending fixing block, and an arc-shaped limiting block arranged on the horizontal adjustment rod near the bending fixing block and corresponding to the fixed forming groove;

[0009] The bending assembly includes a rotating structure rotating along the axis of the bending fixed block, a movable forming roller detachably connected to the rotating structure, an arc-shaped guide hole arranged on the positioning guide block and for one end of the movable forming roller to be inserted, and a movable forming groove arranged on the movable forming roller and corresponding to the fixed forming groove.

[0010] Furthermore, the rotating structure is a U-shaped rotating frame with two ends hinged at two ends of the axis position of the bending fixed block.

[0011] Furthermore, the U-shaped rotating frame is provided with two strip holes which are symmetrically arranged and arranged along the axial direction of the U-shaped rotating frame, and the movable forming roller is fixedly connected in the strip holes.

[0012] Furthermore, a driving handle is provided at one end of the U-shaped rotating frame.

[0013] Furthermore, the base is provided with a clearance hole located at the bottom of the end positioning assembly.

[0014] Furthermore, the fixed forming groove includes a U-shaped groove at the upper end and vertical grooves arranged at both ends of the U-shaped groove.

[0015] Furthermore, the rotating structure is a rotating disk that rotates with the axis of the bending fixed block, and one end of the movable forming roller passes through the arc-shaped guide hole and is connected to the rotating disk.

[0016] Compared with the prior art, the small-sized tube bending mechanism fixes the end of the tube body during bending by an end positioning assembly, and the movable forming roller can be close to the bending fixed block and rotate along the axis of the bending fixed block with the rotating structure to complete the bending of the middle section of the straight tube. At the same time, the movable forming roller can rotate on itself, so that there is rolling friction between the movable forming roller and the tube body during the bending process, thereby avoiding damage to the processed tube body. In addition, the arc-shaped guide hole increases the rotation trajectory of the movable forming roller to improve the tube bending effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of a small-sized pipe bending mechanism.

[0018] Figure 2 for Figure 1 Schematic diagram of the end positioning assembly of a small tube bending mechanism.

[0019] Figure 3 for Figure 1 Schematic diagram of the bending components of a small tube bending mechanism.

[0020] Figure 4 for Figure 1 Schematic diagram of embodiment 2 of the small tube bending mechanism.

[0021] In the figure, 10, base; 11, give way hole; 20, positioning guide block; 30, bending fixed block; 31, fixed forming groove; 311, U-shaped groove; 312, vertical groove; 40, end positioning assembly; 41, fixed seat; 42, horizontal adjustment rod; 43, arc limiting block; 50, bending assembly; 51, rotating structure; 511, U-shaped rotating frame; 512, strip hole; 513, driving handle; 514, rotating disk; 52, movable forming roller; 53, arc guide hole; 54, movable forming groove. DETAILED DESCRIPTION

[0022] Embodiment 1

[0023] See also Figures 1 to 3 , which is a schematic diagram of a small-sized pipe bending mechanism provided by the utility model. The small-sized pipe bending mechanism comprises: a base 10, a positioning guide block 20 and a bending fixing block 30 arranged on the base 10, an end positioning assembly 40 arranged at intervals on one side of the base 10, and a rotatably arranged bending assembly 50. It can be imagined that the small-sized pipe bending mechanism also includes other functional components and specific structures, such as electrical connection components, control components, mounting structures, etc., which are all well-known technologies to those skilled in the art, so they will not be described in detail one by one here.

[0024] The base 10 is fixed on a desktop or equipment platform to form a fixed connection point and lower the entire mechanism. In this embodiment, a U-shaped tube is bent visually to have a certain straight tube length at both ends. The base 10 is provided with a clearance hole 11 located at the bottom of the end positioning component 40. The clearance hole 11 increases the reserved processing straight tube length, reduces the height of the bending component 50 and avoids bending interference.

[0025] A positioning guide block 20 is provided on the base 10 , and the positioning guide block 20 increases the counterweight of the base 10 and extends to form a fixed fulcrum.

[0026] A bending fixed block 30 is provided on one side of the positioning guide block 20. The bending fixed block 30 is provided with a fixed forming groove 31 in the circumference, and the fixed forming groove 31 is adapted to the outer wall of the tube body. The bending fixed block 30 serves as a reference part for bending the bent tube. The outer diameter of the bending fixed block 30 and its bending angle are set according to the required finished product size. Specifically, the fixed forming groove 31 includes a U-shaped groove 311 at the upper end, and vertical grooves 312 arranged at both ends of the U-shaped groove 311. It can be imagined that the tube body is processed into a straight tube before bending, and the straight tube length is reserved for both ends. The bending operation of the bent tube can be completed by completing the bending in the U-shaped groove 311.

[0027] The end positioning assembly 40 is used to fix the end of the tube body before bending and processing, and can determine the reserved straight tube length. The end positioning assembly 40 specifically includes a fixing seat 41 spaced apart from the bending fixing block 30, a horizontal adjustment rod 42 with one end extending toward the bending fixing block 30 is passed through the fixing seat 41, and an arc limiting block 43 is arranged on the horizontal adjustment rod 42 near the bending fixing block 30 and corresponding to the fixed forming groove 31, the arc limiting block 43 approaches the vertical groove 312, and the horizontal adjustment rod 42 is screwed into the fixing seat 41 by a thread or connected to a horizontal driving cylinder to control the distance between the arc limiting block 43 and the vertical groove 312, so as to achieve the purpose of limiting the end of the processed straight tube.

[0028] The bending assembly 50 includes a rotating structure 51 that rotates along the axis of the bending fixed block 30, a movable forming roller 52 that is detachably connected to the rotating structure 51, and a movable forming groove 54 corresponding to the fixed forming groove 31 is provided on the movable forming roller 52. The movable forming roller 52 can be close to the bending fixed block 30, and rotate along the axis of the bending fixed block 30 with the rotating structure 51 to complete the bending of the middle section of the straight tube. At the same time, the movable forming roller 52 can rotate by itself, so that there is rolling friction between the movable forming roller 52 and the tube body during the bending process, thereby avoiding damage to the processed tube body.

[0029] In this embodiment, the rotating structure 51 is a U-shaped rotating frame 511 whose two ends are hinged at the two ends of the axis of the bending fixed block 30. For the integrity of the structure, one end of the U-shaped rotating frame 511 is hinged to the positioning guide block 20 located on the axis extension line of the bending fixed block 30. The two ends of the U-shaped rotating frame 511 are connected, and the bending movement is not interfered and the overall force is balanced. A driving handle 513 is provided at one end of the U-shaped rotating frame 511. The driving handle 513 is used for hand holding and is generally used for small-sized first-piece proofing production.

[0030] The positioning guide block 20 is provided with an arc guide hole 53 for one end of the movable forming roller 52 to be inserted. Angle scale lines are set on the outer wall of the edge of the arc guide hole 53, and the arc guide hole 53 is set with the axis of the bending fixed block 30 as the central axis to increase the rotation trajectory of the movable forming roller 52 and improve the bending effect of the bent pipe.

[0031] The U-shaped rotating frame 511 is provided with two strip holes 512 which are symmetrically arranged and arranged along the axial direction of the U-shaped rotating frame 511. The movable forming roller 52 is fixedly connected in the strip hole 512. The distance between the movable forming roller 52 and the bending fixed block 30 is adjusted through the strip hole 512 to adapt to bending radii of different sizes.

[0032] Embodiment 2

[0033] See also Figure 4 The structure and principle of this embodiment are basically the same as those of the first embodiment, with the only difference being that the rotating structure 51 is a rotating disk 514 that rotates with the axis of the bending fixed block 30, and the rotating disk 514 synchronously replaces the structure of the positioning guide block 20, one end of the movable forming roller 52 passes through the arc guide hole 53 and is connected to the rotating disk 514, and the rotating disk 514 is connected to a driving motor to drive the movable forming roller 52 to rotate, and the bending angle is controlled by the rotating disk 514. This embodiment has a high degree of automation and is more suitable for mass production.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A small tube bending mechanism, characterized in that: The small tube bending mechanism comprises: A base, with a positioning guide block at the upper end, a bending fixing block at one side of the positioning guide block, and a fixed forming groove is provided in the circumference of the bending fixing block; The end positioning assembly comprises a fixing seat spaced apart from the bending fixing block, a horizontal adjustment rod passing through the fixing seat and extending one end toward the bending fixing block, and an arc-shaped limiting block arranged on the horizontal adjustment rod near the bending fixing block and corresponding to the fixed forming groove; The bending assembly includes a rotating structure rotating along the axis of the bending fixed block, a movable forming roller detachably connected to the rotating structure, an arc-shaped guide hole arranged on the positioning guide block and for one end of the movable forming roller to be inserted, and a movable forming groove arranged on the movable forming roller and corresponding to the fixed forming groove.

2. The small tube bending mechanism according to claim 1, characterized in that: The rotating structure is a U-shaped rotating frame with two ends hinged at the two ends of the axis position of the bending fixed block.

3. The small tube bending mechanism according to claim 2, characterized in that: The U-shaped rotating frame is provided with two strip holes which are symmetrically arranged and arranged along the axial direction of the U-shaped rotating frame, and the movable forming roller is fixedly connected in the strip holes.

4. The small tube bending mechanism according to claim 3, characterized in that: A driving handle is provided at one end of the U-shaped rotating frame.

5. The small tube bending mechanism according to claim 1, characterized in that: The base is provided with a clearance hole located at the bottom of the end positioning component.

6. The small tube bending mechanism according to claim 1, characterized in that: The fixed forming groove includes a U-shaped groove at the upper end and vertical grooves arranged at both ends of the U-shaped groove.

7. The small tube bending mechanism according to claim 1, characterized in that: The rotating structure is a rotating disk that rotates with the axis of the bending fixed block, and one end of the movable forming roller passes through the arc-shaped guide hole and is connected to the rotating disk.

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