Pipe end positioning type pipe bending mechanism

Abstract

The invention discloses a pipe end positioning type pipe bending mechanism which comprises a machine base, a die bending assembly is arranged on the machine base, and a clamping channel allowing a pipe to penetrate through and a pipe bending groove communicating with the clamping channel and locally in an arc shape are formed in the die bending assembly. The rotating base is rotationally connected to the machine base, and the rotating center is consistent with the center of the pipe bending groove; the first driving device is arranged between the machine base and the rotating base and used for driving the rotating base to rotate; the pipe bending core rod is connected to the rotating base in a sliding mode and can be inserted into an inner cavity of the pipe fitting penetrating through the clamping channel after sliding; the second driving device is arranged on the rotating seat and is used for driving the pipe bending core rod to slide; the core rod sleeve is connected to the rotating base in a sliding mode and can abut against the pipe end, penetrating through the clamping channel, of the pipe fitting after sliding; the third driving device is arranged on the rotating seat and is used for driving the core rod sleeve to slide; the pipe end positioning type pipe bending mechanism can be used for preparing pipe fittings with flat pipe ends and has better controllability and stability.

Description

Technical Field

[0001] The invention specifically relates to a pipe end positioning type pipe bending mechanism. Background Art

[0002] In the field of metal processing and manufacturing, pipe bending machines are important equipment for bending straight pipes into specific shapes. However, in the traditional pipe bending process, when the pipe is bent, due to the physical properties of the material, the inner bend is compressed and the outer bend is stretched. This uneven deformation often causes the pipe to tilt after bending, affecting the appearance quality and assembly accuracy of the product. Therefore, in the actual processing and manufacturing process, the pipe end often needs to be cut after bending to make it smoother, but this causes cumbersome processing steps and waste of materials. Therefore, the inventor has developed a set of pipe bending process solutions, which requires that an oblique cut be made in advance when the pipe blank is blanked, and then after bending, the originally inclined pipe end surface becomes smoother due to the deformation of the pipe bending. However, if this process solution uses a general pipe bending machine, the pipe needs to be clamped and fixed, so that although the pipe end is less tilted and deformed during the bending process, the material in the middle of the pipe is severely deformed, and the quality of the bent pipe cannot be guaranteed, especially for thin pipes with thin walls and small diameters.

[0003] The present invention is just produced based on the above-mentioned shortcomings. Summary of the invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and to provide a pipe end positioning pipe bending mechanism which can produce pipe fittings with smooth pipe ends and has better controllability and stability.

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

[0006] The present invention provides a pipe end positioning type pipe bending mechanism, which is characterized by comprising:

[0007] A machine base, wherein a bending die assembly is provided on the machine base, and the bending die assembly is provided with a clamping channel for the pipe to pass through, and a bending pipe groove which is connected with the clamping channel and is partially arc-shaped;

[0008] A rotating seat, which is rotatably connected to the machine base and has a rotation center that is consistent with the center of the elbow groove;

[0009] A first driving device is arranged between the machine base and the rotating base and is used to drive the rotating base to rotate;

[0010] A pipe bending mandrel, which is slidably connected to the rotating seat and can be inserted into the inner cavity of the pipe passing through the clamping channel after sliding;

[0011] A second driving device is arranged on the rotating seat and is used to drive the tube bending mandrel to slide;

[0012] A mandrel sleeve is slidably connected to the rotating seat and can be pressed against the end of the pipe passing through the clamping channel after sliding;

[0013] A third driving device is arranged on the rotating seat and is used to drive the core rod sleeve to slide;

[0014] When the bending mandrel pipe fitting is inserted into the inner cavity of the pipe fitting and the mandrel sleeve is pressed against the pipe end of the pipe fitting, the rotating seat rotates relative to the machine base so that the bending mandrel pipe and the mandrel sleeve rotate around the center of the bending groove.

[0015] The pipe end positioning bending mechanism as described above is characterized in that: the bending die assembly includes a bending die support, the bending die support is connected to a bending die piece, the bending die support is slidably connected to a clamping die piece that can approach or move away from the bending die piece, the bending die piece is provided with the bending groove and a first clamping die groove connected to the bending groove, the clamping die piece is provided with a second clamping die groove on a side close to the bending die piece, and the machine base is also provided with a fourth driving device for pushing the clamping die piece toward the bending die piece.

[0016] The tube end positioning bending mechanism as described above is characterized in that: when the clamping mold moves closer to the bending mold, the second clamping mold groove and the first clamping mold groove are combined to form the clamping channel, and the clamping channel matches the shape of the tube or a gap is left between the clamping channel and the tube.

[0017] The tube end positioning tube bending mechanism as described above is characterized in that the mandrel sleeve is sleeved on the tube bending mandrel and can slide axially along the tube bending mandrel.

[0018] The tube end positioning tube bending mechanism as described above is characterized in that: a first slide is slidably connected to the rotating seat, the tube bending mandrel is connected to the first slide, and the output shaft of the second driving device is connected to the first slide and can push the first slide to slide relative to the rotating seat.

[0019] The pipe end positioning bending mechanism as described above is characterized in that: a second slide is slidably connected to the rotating seat, the sliding direction of the second slide is consistent with that of the first slide, the core rod sleeve is connected to the second slide, and the output shaft of the third drive device is connected to the second slide and can push the second slide to slide relative to the rotating seat.

[0020] The tube end positioning tube bending mechanism as described above is characterized in that a first spherical arc surface for pressing against the inner wall of the inner bend of the tube is provided at the end of the tube bending mandrel on the side close to the tube bending groove.

[0021] The tube end positioning tube bending mechanism as described above is characterized in that a second spherical arc surface for pressing against the inner wall of the outer bend of the tube is provided on the end of the tube bending mandrel on the side away from the tube bending groove.

[0022] The pipe end positioning pipe bending mechanism as described above is characterized in that: the radius of the second spherical arc surface is R1, and the arc radius of the center line of the pipe bending groove is R2, then R1=R2.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] The working principle of the pipe bending mechanism of the present invention is that the pipe bending mandrel is pressed against the inner wall of the pipe fitting, and the mandrel sleeve is pressed against the end of the pipe fitting, so that the pipe fitting is basically positioned in the bent pipe. At the same time, the clamping channel supports the pipe fitting without affecting the deformation of the material of the pipe fitting. The pipe bending mandrel is pressed against the inner wall of the pipe fitting so that the wall thickness material of the pipe fitting A is deformed evenly during the bending process, and the outer wall of the pipe fitting is not pressed by external force, so that the pipe fitting can be unevenly deformed smoothly at the inner and outer bends. This deformation offsets the pre-inclined cut pipe end of the pipe fitting, thereby manufacturing the bent pipe part at one time without the need for additional cutting of the pipe end. The process is simple, and the controllability and stability are high, thereby improving the quality and yield of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the pipe bending mechanism of the present invention;

[0026] Figure 2 is a cross-sectional schematic diagram of the pipe bending mechanism of the present invention;

[0027] Figure 3 It is a partial exploded schematic diagram of the pipe bending mechanism of the present invention Figure 1 ;

[0028] Figure 4 It is a partial exploded schematic diagram of the pipe bending mechanism of the present invention Figure 2 ;

[0029] Figure 5 It is a partial exploded schematic diagram of the pipe bending mechanism of the present invention Figure 3 ;

[0030] Figure 6 It is a partial exploded schematic diagram of the pipe bending mechanism of the present invention Figure 4 ;

[0031] Figure 7 It is a partial exploded schematic diagram of the pipe bending mechanism of the present invention Figure 5 ;

[0032] Figure 8 It is a schematic diagram of the working principle of the pipe bending mechanism of the present invention. DETAILED DESCRIPTION

[0033] The invention will be further described below in conjunction with the accompanying drawings:

[0034] The directions described in the specification of the present invention, such as "up", "down", "left", "right", "front", "back", etc., are based on the directions of the drawings and are intended to facilitate the description of the relationship between the various components. They do not indicate the unique or absolute positional relationship between the various components. They are only one of the implementation methods of the invention and are not a limitation on its implementation method.

[0035] In this embodiment, a pipe end positioning type pipe bending mechanism is provided, such as Figures 1 to 7 As shown, the mechanism includes a machine base 1, a rotating base 3, a bending die assembly 2, a first driving device 4, a bending mandrel 51, a second driving device 6, a mandrel sleeve 52, and a third driving device 7. The machine base 1 is provided with a bending die assembly 2, and the bending die assembly 2 is provided with a clamping channel 21 for the pipe A to pass through, and a bending groove 22 that is connected to the clamping channel 21 and is partially arc-shaped. The pipe A passes through the clamping channel 21 from the rear and extends in front of the clamping channel 21. The rotating base 3 is rotatably connected to the machine base 1 and the rotation center is consistent with the center of the bending groove 22. The first driving device 4 is arranged between the machine base 1 and the rotating base 3 and is used to drive the rotating base 3 to rotate; the bending mandrel 51 is slidably connected to the rotating base 3 The mandrel 51 is a tube bending machine which is mounted on the rotating seat 3 and can be inserted into the inner cavity of the tube A passing through the clamping channel 21 after sliding, and the sliding trajectory of the bending mandrel 51 is basically tangent to the center line of the bending groove 22; the second driving device 6 is arranged on the rotating seat 3 and is used to drive the bending mandrel 51 to slide; the mandrel sleeve 52 is slidably connected to the rotating seat 3 and can be pressed against the end of the tube A passing through the clamping channel 21 after sliding; the third driving device 7 is arranged on the rotating seat 3 and is used to drive the mandrel sleeve 52 to slide. When the bending mandrel 51 of the tube A is inserted into the inner cavity of the tube A and the mandrel sleeve 52 is pressed against the end of the tube A, the rotating seat 3 rotates relative to the machine base so that the bending mandrel 51 and the mandrel sleeve 52 rotate around the center of the bending groove 22. Its working principle is as follows: Figure 8As shown, the pipe A passes through the clamping channel 21 from the rear and extends out from the front of the clamping channel 21. The second driving device 6 drives the bending mandrel 51 to slide so that the end of the bending mandrel 51 is inserted into the front of the pipe A. The third driving device 7 drives the mandrel sleeve 52 to slide so that the rear end surface of the mandrel sleeve 52 abuts against the front end of the mandrel sleeve 52. The first driving device 4 drives the rotating seat 3 to rotate, and then the pipe A is driven to bend and deform around the bending groove 22 through the bending mandrel 51 and the mandrel sleeve 52, thereby realizing the bending function. The bending mandrel 51 abuts against the inner wall of the pipe A, and the mandrel sleeve 52 The end of the pipe fitting A is pressed against the end of the pipe fitting A, so that the pipe fitting A is basically positioned when the pipe is bent. The bending mandrel 51 is pressed against the inner wall of the pipe fitting A, so that the wall thickness material of the pipe fitting A is evenly deformed during the bending process, and the outer wall of the pipe fitting A is not pressed by external force. Finally, during the bending process of the pipe fitting A, the friction force on both the inner wall and the outer wall is relatively small, so that the pipe fitting A can be unevenly deformed smoothly at the inner and outer bends. This deformation offsets the pre-inclined cut pipe end of the pipe fitting A, thereby manufacturing the bent pipe part at one time without the need for additional cutting of the pipe end. The process is simple, and the controllability and stability are high, thereby improving the quality and yield of the product.

[0036] In detail, Figure 3 and Figure 4 As shown, the bending die assembly 2 includes a bending die support 23, to which a bending die member 24 is connected, and a clamping die member 25 which can approach or move away from the bending die member 24 is slidably connected to the bending die support 23, and the bending die member 24 is provided with the bending pipe groove 22 and a first clamping die groove 241 connected to the bending pipe groove 22, and the clamping die member 25 is provided with a second clamping die groove 251 on the side close to the bending die member 24, and the machine base is also provided with a fourth driving device 26 for pushing the clamping die member 25 toward the bending die member 24. Moreover, in this embodiment, by controlling the stroke of the fourth driving device 26, when the clamping mold 25 moves closer to the bending mold 24, the second clamping mold groove 251 and the first clamping mold groove 241 are closed together to form the clamping channel 21, and the clamping channel 21 matches the shape of the pipe A or there is a gap between the clamping channel 21 and the pipe A, so that the clamping channel 21 can be sleeved on the outer wall of the pipe A without causing a large pre-tightening force on the pipe A, and a small pre-tightening pressure can be appropriately applied to the pipe A without affecting the deformation of the pipe A. In addition, this structure has another important feature, such as Figure 8 As shown, during the continuous process of pipe A being conveyed to the clamping channel 21, pipe A1 located in the front, i.e., the bending position, is bending the pipe, while pipe A2 located in the rear presses against the rear end of pipe A1, thereby positioning the other end of the pipe, thereby improving the reliability and stability of the mechanism.

[0037] ,like Figures 2 to 7As shown, the core rod sleeve 52 is sleeved on the bending core rod 51 and can slide axially along the bending core rod 51, the rotating seat 3 is slidably connected with the first slide seat 31, the bending core rod 51 is connected to the first slide seat 31, the output shaft of the second driving device 6 is connected to the first slide seat 31 and can push the first slide seat 31 to slide relative to the rotating seat 3, the rotating seat 3 is slidably connected with the second slide seat 32, the sliding direction of the second slide seat 32 is consistent with the first slide seat 31, the core rod sleeve 52 is connected to the second slide seat 32, and the output shaft of the third driving device 7 is connected to the second slide seat 32 and can push the second slide seat 32 to slide relative to the rotating seat 3.

[0038] As a preferred solution of this embodiment, Figure 2 and Figure 7 As shown, the end of the bending mandrel 51 is provided with a first spherical arc surface 511 on the side close to the bending groove 22 for pressing against the inner wall of the inner bend of the pipe fitting A, and the end of the bending mandrel 51 is provided with a second spherical arc surface 512 on the side away from the bending groove 22 for pressing against the inner wall of the outer bend of the pipe fitting A, thereby reducing the friction force caused by the end of the bending mandrel 51 on the inner wall of the pipe fitting A, so that the deformation of the pipe fitting A is more uniform.

[0039] As a preference, Figure 2 As shown, the radius of the second spherical arc surface 512 is R1, and the arc radius of the center line of the bending groove 22 is R2, then R1=R2, so that the end of the bending mandrel 51 exerts a uniform supporting force on the inner wall of the pipe fitting A, while not affecting the material deformation of the inner wall of the pipe fitting A.

[0040] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A pipe end positioning pipe bending mechanism, characterized in that: Included A machine base (1), wherein a bending die assembly (2) is provided on the machine base (1), and the bending die assembly (2) is provided with a clamping channel (21) for the pipe (A) to pass through, and a bending pipe groove (22) which is connected to the clamping channel (21) and is partially arc-shaped; A rotating seat (3) is rotatably connected to the machine base (1) and its rotation center is consistent with the center of the curved pipe groove (22); A first driving device (4) is arranged between the machine base (1) and the rotating base (3) and is used to drive the rotating base (3) to rotate; A pipe bending mandrel (51) is slidably connected to the rotating seat (3) and can be inserted into the inner cavity of the pipe (A) passing through the clamping channel (21) after sliding; A second driving device (6) is arranged on the rotating seat (3) and is used to drive the pipe bending mandrel (51) to slide; A mandrel sleeve (52) is slidably connected to the rotating seat (3) and can be pressed against the end of the pipe (A) passing through the clamping channel (21) after sliding; A third driving device (7) is arranged on the rotating seat (3) and is used to drive the core rod sleeve (52) to slide; When the pipe bending mandrel (51) and the pipe fitting (A) are inserted into the inner cavity of the pipe fitting (A) and the mandrel sleeve (52) is pressed against the end of the pipe fitting (A), the rotating seat (3) rotates relative to the machine seat so that the pipe bending mandrel (51) and the mandrel sleeve (52) both rotate around the center of the pipe bending groove (22).

2. The pipe end positioning pipe bending mechanism according to claim 1, characterized in that: The bending die assembly (2) comprises a bending die support (23), a bending die member (24) is connected to the bending die support (23), a clamping die member (25) is slidably connected to the bending die support (23) and can move closer to or farther away from the bending die member (24), the bending die member (24) is provided with the bending pipe groove (22) and a first clamping die groove (241) connected to the bending pipe groove (22), the clamping die member (25) is provided with a second clamping die groove (251) on a side close to the bending die member (24), and the machine base is also provided with a fourth driving device (26) for pushing the clamping die member (25) toward the bending die member (24).

3. The pipe end positioning pipe bending mechanism according to claim 2, characterized in that: When the clamping mold (25) moves closer to the bending mold (24), the second clamping mold groove (251) and the first clamping mold groove (241) are closed together to form the clamping channel (21), and the clamping channel (21) matches the shape of the pipe (A) or a gap is left between the clamping channel (21) and the pipe (A).

4. The pipe end positioning pipe bending mechanism according to claim 1, characterized in that: The core rod sleeve (52) is sleeved on the pipe bending core rod (51) and can slide axially along the pipe bending core rod (51).

5. The pipe end positioning pipe bending mechanism according to claim 4, characterized in that: The rotating seat (3) is slidably connected to a first slide seat (31), the bending mandrel (51) is connected to the first slide seat (31), and the output shaft of the second driving device (6) is connected to the first slide seat (31) and can push the first slide seat (31) to slide relative to the rotating seat (3).

6. The pipe end positioning pipe bending mechanism according to claim 4, characterized in that: A second slide (32) is slidably connected to the rotating seat (3), the sliding direction of the second slide (32) is consistent with that of the first slide (31), the mandrel sleeve (52) is connected to the second slide (32), and the output shaft of the third driving device (7) is connected to the second slide (32) and can push the second slide (32) to slide relative to the rotating seat (3).

7. The pipe end positioning pipe bending mechanism according to claim 1, characterized in that: The end of the pipe bending mandrel (51) is provided with a first spherical arc surface (511) on a side close to the pipe bending groove (22) for pressing against the inner wall of the inner bend of the pipe member (A).

8. The pipe end positioning pipe bending mechanism according to claim 1, characterized in that: The end of the pipe bending mandrel (51) is provided with a second spherical arc surface (512) on the side away from the pipe bending groove (22) for pressing against the inner wall of the outer bend of the pipe member (A).

9. The pipe end positioning pipe bending mechanism according to claim 8, characterized in that: The radius of the second spherical arc surface (512) is R1, and the arc radius of the center line of the curved pipe groove (22) is R2, so R1=R2.

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