Pipe end positioning structure for pipe bending equipment

Abstract

The utility model discloses a pipe end positioning structure for pipe bending equipment, which comprises a machine base, a bending die assembly is arranged on the machine base, and a clamping channel for a pipe fitting to pass through and a pipe bending groove which is communicated with the clamping channel and is locally arc-shaped are arranged on the bending die 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 utility model provides the pipe end positioning structure for the pipe bending equipment, which can be used for preparing a pipe fitting with a flat pipe end and has better controllability and stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe end positioning structure for pipe bending equipment. BACKGROUND

[0002] In the field of metal processing and manufacturing, a pipe bender is an important equipment for bending a straight pipe into a specific shape. However, in the traditional pipe bending process, when the pipe is bent, the inner bend is compressed and the outer bend is stretched due to the physical properties of the material. This uneven deformation often leads to the inclination of the pipe end after bending, affecting the appearance quality and assembly precision of the product. Therefore, in the actual processing and manufacturing process, the pipe end often needs to be cut after bending to make it more flat. However, this causes the processing steps to be complicated and the material to be wasted. Therefore, the present utility model person has developed a set of pipe bending process scheme. This scheme requires that the pipe be made with an inclined cut when the pipe blank is blanked. Then, after bending, the originally inclined pipe end surface becomes more flat due to the deformation of the pipe end during bending. However, if a general pipe bender is used for this process scheme, the pipe needs to be clamped and fixed. This makes the pipe end deformation smaller during bending, but the material deformation in the middle of the pipe is severe, which cannot guarantee the quality of the bent pipe, especially for thin-walled and small-diameter pipes.

[0003] The present utility model is just generated based on the above-mentioned deficiencies. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a pipe end positioning structure for pipe bending equipment that can produce a pipe with a flat end and has better controllability and stability.

[0005] The utility model is implemented through the following technical solutions:

[0006] The utility model provides a pipe end positioning structure for pipe bending equipment, characterized by comprising

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

[0008] A rotating seat is rotatably connected to the machine base and has a rotating center consistent with the center of the pipe bending groove;

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

[0010] A pipe bending mandrel 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 used to drive the bending mandrel to slide;

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

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

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

[0015] The pipe end positioning structure for the pipe bending device has the characteristics that the bending die assembly comprises a bending die support, a bending die is connected to the bending die support, a die clamping member capable of approaching or moving away from the bending die is slidably connected to the bending die support, the bending die is provided with the bending groove and the first die clamping groove connected to the bending groove, the second die clamping groove is arranged on one side of the die clamping member close to the bending die, and the fourth driving device for pushing the die clamping member to approach the bending die is further arranged on the machine base.

[0016] The pipe end positioning structure for the pipe bending device has the characteristics that when the die clamping member approaches the bending die, the second die clamping groove and the first die clamping groove are combined to form the clamping channel, and the clamping channel is matched with the shape of the pipe or a gap is left between the clamping channel and the pipe.

[0017] The pipe end positioning structure for the pipe bending device has the characteristics that the mandrel sleeve is sleeved on the bending mandrel and can slide axially along the bending mandrel.

[0018] The pipe end positioning structure for the pipe bending device has the characteristics that the first sliding seat is slidably connected to the rotating seat, the bending mandrel is connected to the first sliding seat, and the output shaft of the second driving device is connected to the first sliding seat and can push the first sliding seat to slide relative to the rotating seat.

[0019] The pipe end positioning structure for the pipe bending device has the characteristics that the second sliding seat is slidably connected to the rotating seat, the sliding direction of the second sliding seat is consistent with that of the first sliding seat, the mandrel sleeve is connected to the second sliding seat, and the output shaft of the third driving device is connected to the second sliding seat and can push the second sliding seat to slide relative to the rotating seat.

[0020] The pipe end positioning structure for the pipe bending device has the characteristics that the first spherical surface for pressing against the inner wall of the inner bend of the pipe is arranged on one side of the end of the bending mandrel close to the bending groove.

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

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

[0023] Compared with the prior art, the pipe end positioning structure has the following advantages:

[0024] The working principle of the pipe end positioning structure is that the pipe is positioned in the bending process by the pipe bending mandrel abutting against the inner wall of the pipe and the mandrel sleeve abutting against the end of the pipe, meanwhile, the clamping channel supports the pipe without affecting the deformation of the material of the pipe, the pipe bending mandrel abutting against the inner wall of the pipe makes the wall thickness material of the pipe A deform uniformly in the bending process, and the outer wall of the pipe is not compressed by external force, so that the pipe can deform smoothly at the inner bend and the outer bend, the deformation offsets the pre-inclined cut pipe end, thereby the pipe part is made at one time, the pipe end does not need to be additionally cut off, the process is simple, and controllability and stability are higher, and the quality and yield of the product are improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of the pipe end positioning structure of the utility model;

[0026] Figure 2 is a sectional view of the pipe end positioning structure of the utility model;

[0027] Figure 3 is a local partial exploded schematic view of the pipe end positioning structure of the utility model Figure 1 ;

[0028] Figure 4 is a local partial exploded schematic view of the pipe end positioning structure of the utility model Figure 2 ;

[0029] Figure 5 is a local partial exploded schematic view of the pipe end positioning structure of the utility model Figure 3 ;

[0030] Figure 6 is a local partial exploded schematic view of the pipe end positioning structure of the utility model Figure 4 ;

[0031] Figure 7 is a local partial exploded schematic view of the pipe end positioning structure of the utility model Figure 5 ;

[0032] Figure 8This is a schematic diagram illustrating the working principle of the pipe end positioning structure of this utility model. Detailed Implementation

[0033] The utility model will be further described below with reference to the accompanying drawings:

[0034] The orientations described in this utility model specification, such as "up," "down," "left," "right," "front," and "back," are based on the orientations in the accompanying drawings and are intended to facilitate the description of the relationships between the various components. They do not indicate the unique or absolute positional relationships between the various components, but are merely one embodiment of the utility model and are not a limitation on its implementation.

[0035] In this embodiment, a pipe end positioning structure for a pipe bending device is provided, such as... Figures 1 to 7 As shown, this mechanism includes a base 1, a rotating seat 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 base 1 is equipped with the bending die assembly 2, which has a clamping channel 21 through which a pipe fitting A passes, and a bending groove 22 connected to the clamping channel 21 and partially arc-shaped. The pipe fitting A passes through the clamping channel 21 from the rear and extends out from the front. The rotating seat 3 is rotatably connected to the base 1, and its rotation center coincides with the center of the bending groove 22. The first driving device 4 is located between the base 1 and the rotating seat 3 and is used to drive the rotating seat 3 to rotate. The bending mandrel 51 is slidably connected to the rotating seat 3. The mandrel 51 is inserted into the inner cavity of the pipe A through the clamping channel 21 after sliding, and the sliding trajectory of the mandrel 51 is basically tangent to the center line of the bending groove 22; the second driving device 6 is set on the rotating seat 3 and is used to drive the mandrel 51 to slide; the mandrel sleeve 52 is slidably connected to the rotating seat 3 and can press against the end of the pipe A through the clamping channel 21 after sliding; the third driving device 7 is set on the rotating seat 3 and is used to drive the mandrel sleeve 52 to slide. When the mandrel 51 is inserted into the inner cavity of the pipe A and the mandrel sleeve 52 presses against the end of the pipe A, the rotating seat 3 rotates relative to the machine base, thereby causing both the mandrel 51 and the mandrel sleeve 52 to 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 behind and extends out in 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 face of the mandrel sleeve 52 abuts against the front end of the mandrel sleeve 52, and then the first driving device 4 drives the rotating seat 3 to rotate, and then the bending mandrel 51 and the mandrel sleeve 52 drive the pipe A to bend and deform around the bending groove 22, thereby realizing the bending function. The bending mandrel 51 abuts against the inner wall of the pipe A, and at the same time the mandrel sleeve 52 abuts against the end of the pipe A, so that the pipe A is positioned in the bending process, the bending mandrel 51 abuts against the inner wall of the pipe A to make the wall thickness of the pipe A deform uniformly in the bending process, and the outer wall of the pipe A is not pressed by external force, so that the pipe A can smoothly deform unevenly at the inner bend and the outer bend, the deformation offsets the pre-inclined cut pipe end of the pipe A, thereby making the bending part in one time, without 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] As shown in detail, Figure 3 and Figure 4 As shown, the bending die assembly 2 comprises a bending die support 23, the bending die support 23 is connected with a bending die 24, the bending die support 23 is slidably connected with a clamping die 25 which can approach or move away from the bending die 24, the bending die 24 is provided with the bending groove 22 and the first clamping die groove 241 connected with the bending groove 22, the clamping die 25 is provided with the second clamping die groove 251 on the side close to the bending die 24, and the machine base is further provided with the fourth driving device 26 for pushing the clamping die 25 to approach the bending die 24. And in this embodiment, by controlling the stroke of the fourth driving device 26, when the clamping die 25 approaches the bending die 24, the second clamping die groove 251 and the first clamping die groove 241 are folded to form the clamping channel 21, the clamping channel 21 is matched with 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, and the pipe A is not subjected to a large pre-tightening force, and a small pre-tightening pressure can be appropriately applied to the pipe A, so as not to affect the deformation of the pipe A. In addition, this structure has another important feature, as shown in Figure 8 During the continuous conveying of the pipe A to the clamping channel 21, the pipe A1 located in front, that is, the bending position, is subjected to bending, and the pipe A2 located at the rear abuts against the rear end of the pipe A1, thereby realizing the positioning of the other pipe end, thereby improving the reliability and stability of the mechanism.

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

[0038] As a preferred scheme of the embodiment, as shown in Figure 2 and Figure 7 As shown in the figure, the elbow core rod 51 is provided with a first spherical arc surface 511 for pressing against the inner wall of the inner elbow of the pipe A at one end close to the elbow groove 22, and is provided with a second spherical arc surface 512 for pressing against the inner wall of the outer elbow of the pipe A at the other end away from the elbow groove 22, so as to reduce the friction force caused by the end of the elbow core rod 51 to the inner wall of the pipe A, and make the deformation of the pipe A more uniform.

[0039] As a preferred scheme, as shown in Figure 2 The radius of the second spherical arc surface 512 is R1, and the radius of the circular arc of the center line of the elbow groove 22 is R2, so R1=R2, so that the end of the elbow core rod 51 causes uniform support force to the inner wall of the pipe A, and does not affect the material deformation of the inner wall of the pipe A.

[0040] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be regarded as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A tube end positioning structure for a tube bending apparatus, characterized by: The utility model relates to a pipe bending machine, including A machine base (1) is equipped with a bending die assembly (2), the bending die assembly (2) is equipped with the clamping passageway (21) that pipe (A) passes through, the bending pipe groove (22) that the clamping passageway (21) intercommunication and partially are arc-shaped; A rotating seat (3) is rotatably connected to the machine base (1) and the center of rotation is consistent with the center of the bending pipe groove (22); A first driving device (4) is arranged between the machine base (1) and the rotating seat (3) and is used to drive the rotating seat (3) to rotate; A bending pipe 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 passageway (21) after sliding; A second driving device (6) is arranged on the rotating seat (3) and is used to drive the bending pipe mandrel (51) to slide; A mandrel sleeve (52) is slidably connected to the rotating seat (3) and can be pressed against the pipe end of the pipe (A) passing through the clamping passageway (21) after sliding; A 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 pipe mandrel (51) is inserted into the inner cavity of the pipe (A) and the mandrel sleeve (52) is pressed against the pipe end of the pipe (A), the rotating seat (3) rotates relative to the machine base, and the bending pipe mandrel (51) and the mandrel sleeve (52) rotate around the center of the bending pipe groove (22).

2. A tube end positioning structure for a tube bending apparatus according to claim 1, characterized by: The bending die assembly (2) includes a bending die support (23), the bending die support (23) is connected with a bending die (24), the bending die support (23) is slidably connected with a die clamping piece (25) capable of approaching or moving away from the bending die (24), the bending die (24) is provided with the bending pipe groove (22) and a first die clamping groove (241) connected with the bending pipe groove (22), the die clamping piece (25) is provided with a second die clamping groove (251) on the side close to the bending die (24), and the machine base is further provided with a fourth driving device (26) for pushing the die clamping piece (25) to approach the bending die (24).

3. A tube end positioning structure for a tube bending apparatus according to claim 2, characterized by: When the die clamping piece (25) approaches the bending die (24), the second die clamping groove (251) and the first die clamping groove (241) are folded to form the clamping passageway (21), and the clamping passageway (21) is matched with the shape of the pipe (A) or a gap is left between the clamping passageway (21) and the pipe (A).

4. A tube end positioning structure for a tube bending apparatus according to claim 1, characterized by: The mandrel sleeve (52) is sleeved on the bending pipe mandrel (51) and can slide axially along the bending pipe mandrel (51).

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

6. A tube end positioning structure for a tube bending apparatus according to claim 4, characterized by: The rotating base (3) is slidably connected with a second sliding base (32), the sliding direction of the second sliding base (32) is consistent with that of the first sliding base (31), the core rod sleeve (52) is connected to the second sliding base (32), and the output shaft of the third driving device (7) is connected to the second sliding base (32) and can push the second sliding base (32) to slide relative to the rotating base (3).

7. A tube end positioning structure for a tube bending apparatus according to claim 1, characterized by: The end of the pipe bending core rod (51) is provided with a first spherical arc surface (511) for pressing against the inner wall of the inner bend of the pipe (A) on the side close to the pipe bending groove (22).

8. A tube end positioning structure for a tube bending apparatus according to claim 1, characterized by: The end of the pipe bending core rod (51) is provided with a second spherical arc surface (512) for pressing against the inner wall of the outer bend of the pipe (A) on the side away from the pipe bending groove (22).

9. A tube end positioning structure for a tube bending apparatus according to claim 8, characterized in that: The radius of the second spherical arc surface (512) is R1, the radius of the circular arc of the center line of the pipe bending groove (22) is R2, and R1=R2.

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