CN115532903A - Pipe stretch bending equipment and its use method - Google Patents

Abstract

The invention discloses a pipe stretch bending device and a using method thereof, wherein the pipe stretch bending device comprises a base, wherein a pipe placing frame is arranged on the base; the outer edge of the pipe placing frame is arc-shaped, and a bayonet is formed on the outer edge of the pipe placing frame; two ends of the support surface of the bayonet are positioned at the inner sides of two ends of the pipe placing rack, and a gap is formed between the two ends; two ends of the bayonet are provided with first bending mechanisms, and each first bending mechanism comprises a bending block and a limiting block; the limiting block partially protrudes out of the bending block and is positioned at the gap; the base is also provided with a limiting mechanism comprising a driving assembly and a limiting plate; the limiting plate is located the outside of tubular product rack, and drive assembly drive its Y axle direction along the base removes until the outward flange butt of limiting plate and bayonet socket. The invention has the advantages that: the placing position of the pipe is limited by the bayonet, and the limiting block is abutted against the outer edge of the bayonet to fix the pipe; the limiting block is matched with the bending block, so that the pipe is prevented from bending and deforming in the middle of the pipe in the bending process, and the yield of the pipe is improved.

Description

Pipe stretch bending equipment and its use method

technical field

The invention belongs to the technical field of mechanical manufacturing, and in particular relates to a pipe stretch bending equipment and a using method thereof.

Background technique

Pipes are widely used in the automotive industry, such as front/rear anti-collision beams, seat frames, instrument panel beams, body structural parts, front/rear subframes, etc. The existing process or equipment can only complete the bending operation on the two-dimensional plane of the pipe. If the pipe needs to be bent in the three-dimensional space as shown in Figure 1, it is necessary to bend the pipe locally through multiple processes. And it needs to be combined with bending mixing process (such as bending and shaping operation) to complete. However, since the pipe needs to be repeatedly positioned and stretched, the positioning size, that is, the accuracy, is required to be high, and the stability of the final pipe cannot be guaranteed.

In addition, when the end of the pipe needs to be bent, the middle area of the pipe is extremely easy to be deformed by force or produce the same arc as the bending direction, resulting in processing that does not meet the requirements.

Therefore, it is an important technical problem to be solved by those skilled in the art at present to design a kind of pipe stretch bending equipment and its use method.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems in the prior art, and to provide a pipe stretch bending equipment and a method of use thereof.

The purpose of the present invention is achieved through the following technical solutions:

The pipe stretch bending equipment includes a base on which a pipe placing frame is arranged; the outer edge of the pipe placing frame is arc-shaped, and a bayonet for clamping pipes is formed on the outer edge; the bayonet The two ends of the supporting surface of the mouth are located inside the two ends of the pipe placement frame, and a gap is formed between them; the two ends of the bayonet are provided with a first bending mechanism, and the first bending mechanism includes a The bending block and the limiting block for bending the pipe; the limiting block partially protrudes from the bending surface of the bending block and is located at the gap; the base is also provided with a limiting mechanism, so The limit mechanism includes a drive assembly and a limit plate; the limit plate is located on the outside of the pipe placement frame, and is driven by the drive assembly to move along the Y-axis direction of the base until the limit plate The plate abuts against the outer edge of the bayonet.

Preferably, the first bending mechanism is arranged symmetrically on both sides of the limiting mechanism; it also includes a driving cylinder that drives the bending block to reciprocate along the Y-axis direction of the base.

Preferably, the bending surface of the bending block is arc-shaped, and the highest point of the bending surface is located outside the end of the pipe placement frame; the height of the bending block is not less than that of the pipe placement frame. shelf height.

Preferably, the limiting mechanism is located between the pipe placement frame and the base plate; the driving assembly is a cylinder, and when the cylinder shaft is stretched out, the limiting plate is driven to move to the outer edge of the base ; The cylinder shaft of the driving assembly shrinks, driving the limiting plate to move towards the pipe placement frame.

Preferably, at least two supporting columns are fixed between the base and the pipe placement frame, the driving assembly is located between the two supporting columns, and the height of the supporting column is not less than that of the driving assembly the height of.

Preferably, the base is also provided with a fixing seat, the fixing seat is located on the rear side of the pipe placing frame, and is clamped with the pipe placing frame; the fixing seat is fixed with a second bending mechanism for placing The mounting frame; the second bending mechanism includes a Y-axis moving mechanism arranged on the mounting frame, and a Z-axis moving mechanism arranged on the Y-axis moving mechanism; the Z-axis moving mechanism is provided with Clamping mechanism; the clamping mechanism is driven by the Z-axis moving mechanism to move toward the pipe placement frame until the clamping mechanism moves to the outside of the bending block and clamps the pipe.

Preferably, the Z-axis moving mechanism is also provided with a jaw mounting frame, and the clamping mechanism is arranged on both sides of the jaw mounting frame; the clamping mechanism is connected to the main body of the jaw mounting frame The distance is equivalent to the distance from the bayonet socket to the upper surface of the Y-axis moving mechanism; the outer side of the bending block is a plane, and a circular arc transitions with the bending surface; the Y-axis moving mechanism Driving the clamping mechanism to move toward the opening of the bayonet until the clamping mechanism abuts against the outer plane of the bending block.

Preferably, the Y-axis moving mechanism is a linear moving assembly; a second fixed seat is arranged above the Y-axis moving mechanism, and the Z-axis moving mechanism is fixed on the second fixed seat; the Y-axis moving mechanism Driving the second fixing seat to move relative to the installation frame along the Y-axis direction of the base.

The method of using the pipe stretch bending equipment, including the pipe stretch bending equipment, and the following operation steps:

S1, start the limit mechanism, drive the limit plate to move along the Y-axis direction of the base, until the limit plate abuts against the outer edge of the pipe placement rack, and limits the pipe to the bayonet;

S2, start the first bending mechanism, drive the bending block and the limit block to move towards the bayonet until the limit block abuts against the bottom surface of the bayonet; and bend the pipe by the bending block Bending operation, so that the pipe fits the bayonet completely;

S3, sequentially reset the first bending mechanism and the limiting mechanism to their initial positions.

Preferably, the following steps are also included:

S1, start the Z-axis moving mechanism, drive the jaw mounting frame and the clamping mechanism to move to the base until the clamping mechanism is located at both ends of the pipe placement frame;

S2, start the clamping mechanism, and clamp the pipe placed on the pipe placement rack;

S3, start the Y-axis moving mechanism, drive the clamping mechanism and the pipe to move toward the bending block, until the clamping mechanism abuts against the outer plane of the bending block;

S4, sequentially reset the clamping mechanism, the Z-axis moving mechanism, the Y-axis moving mechanism, the first bending mechanism and the limit mechanism to their initial positions.

The advantage of technical solution of the present invention is mainly reflected in:

The placement position of the pipe is limited by the bayonet, and the limit block is abutted against the outer edge of the bayonet to fix the pipe; the limit block cooperates with the bending block to ensure that the middle part of the pipe will not be bent during the bending process Deformation, improve the yield rate of pipes;

The bending block moves the end of the pipe to the bayonet until the inner wall of the pipe is completely attached to the bayonet to complete the first bending of the pipe; then cooperate with the bending block through the clamping mechanism to make the pipe form a bend with the bending block The second bending and the third bending of the curved surface; one clamping can complete multiple bendings, which is convenient for the shape of the bent pipe and improves the processing efficiency and stability at the same time;

The first bending mechanism, the second bending mechanism and the limit mechanism are all integrated on the base, reducing the footprint of the base while making the equipment more compact and improving the space utilization of the overall equipment.

Description of drawings

Fig. 1: Accompanying drawing of background technology of the present invention;

Fig. 2: the perspective view of the first direction of the preferred embodiment of the present invention;

Fig. 3: the perspective view of the second direction of the preferred embodiment of the present invention;

Fig. 4: the front view of preferred embodiment of the present invention;

Figure 5: a top view of a preferred embodiment of the present invention;

Figure 6: a side view of a preferred embodiment of the present invention;

Fig. 7: A partial hidden perspective view of the pipe placing frame of the preferred embodiment of the present invention.

detailed description

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are only typical examples of applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

In the description of the scheme, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of description, rather than indicating or implying that the device or element referred to must have a specific orientation , constructed and operated in a particular orientation and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. Moreover, in the description of the solution, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

As shown in FIG. 2 and FIG. 4 or FIG. 7, the present invention discloses a pipe stretch bending equipment, including a base 1, on which a pipe placement frame 2 is arranged, specifically, the base 1 and the At least two support columns 102 are fixed between the pipe placing frames 2 . The outer edge of the pipe placing frame 2 is arc-shaped, and a bayonet 20 for clamping the pipe is formed on the outer edge. The two ends of the supporting surface 201 of the bayonet socket 20 are located inside the two ends of the pipe placing frame 2 , and a gap is formed between them.

As shown in FIG. 3 and FIG. 5 , the two ends of the bayonet 20 are provided with a first bending mechanism 3 , and the first bending mechanism 3 includes a bending block 32 for bending a pipe. Wherein the bending blocks 32 are located at both ends of the pipe placing frame 2 . The bending block 32 includes at least one arc-shaped bending surface 321; the highest point of the bending surface 321 is located outside the end of the pipe placement frame 2, and exerts a force on the pipe until the pipe is in contact with the pipe. The above-mentioned bending surface 321 is bonded. In order to ensure the bending effect, in the present invention, the height of the bending block 32 is preferably designed to be not less than the height of the pipe placement frame 2, so as to ensure that the bending block 32 can exert force on the pipe.

As shown in FIG. 3 , the bending mechanism 3 further includes a limiting block 33 , the limiting block 33 partially protrudes from the bending surface 321 of the bending block 32 and is located on the supporting surface of the bayonet socket 20 201 and the gap between the two ends of the pipe placement rack 2 . The distance between the free end of the limiting block 33 and the highest point of the bending surface 321 of the bending block 32 is equivalent to the width of the pipe. The limit movement position of the bending block 32 is limited by the abutment of the limit block 33 with the pipe placement frame 2; and when the limit block 33 abuts with the pipe placement frame 2, the The bending block 32 exerts force on both ends of the pipe, and makes the pipe form a first bend that fits with the outer edge of the pipe placement frame 2 .

Further, the bending mechanism 3 further includes a driving cylinder 31 that drives the bending block 32 to reciprocate along the Y-axis direction of the base 1 (the width direction of the base 1 ). Specifically, the driving cylinder 31 is fixed on the cylinder mounting seat 310, and the cylinder shaft of the driving cylinder 31 passes through the cylinder mounting seat 310 and the bending mounting seat for placing the bending block, and is connected with the bending block 32 Detachable connection. The bending block 32 is fixed on the bending mounting seat by bolts, and a card interface is formed on the bending block 32 along its height direction, and the cylinder shaft of the driving cylinder 31 is connected to the card interface; along Z In the axial direction (the height direction of the bending block 32 ), the bending block 32 can be taken out from the bending mounting seat and disassembled from the driving cylinder 31 to facilitate the replacement of the bending block 32 . In order to prevent the bending block 32 from shaking left and right during the moving process, it is preferable in the present invention that guide rods parallel to each other are arranged on both sides of the bending mounting seat, and the distance between the two guiding rods is equal to that of the bending mounting seat. Width; that is, the bending mounting seat is limited by the guide bar, which further enhances the stability of the bending block 32 during movement.

As shown in Figures 2 to 4, a limit mechanism 4 is also provided on the base 1, and the limit mechanism 4 is centrally arranged between the two first bending mechanisms 3; that is, the two first bending mechanisms 3 A bending mechanism 3 is symmetrically arranged on both sides of the limiting mechanism 4 . Further, the limiting mechanism 4 is located between the pipe placing frame 2 and the base plate 1 . The limit mechanism 4 at least includes a drive assembly 40, the drive assembly 40 is a cylinder, and is located between the two support columns 102, and the height of the drive assembly 40 and the support columns 102 is not less than the The height of the drive assembly 40; providing enough space for the drive assembly 40 to be installed.

As shown in FIG. 3 or FIG. 5 , the cylinder shaft of the drive assembly 40 is fixedly connected to the moving plate 41 , the moving plate 41 is located above the base 1 , and there is a slideway between the base 1 and the base 1 . mechanism, and the sliding mechanism includes components disclosed in the prior art, such as slide rail components or screw rods, which can complete linear movement, and will not be described in detail here.

As shown in Figure 5, the limiting mechanism 4 also includes a limiting plate 42 vertically fixed on the moving plate 41, the limiting plate 42 is located on the outside of the pipe placement frame 2, and is driven by the The component 40 drives it to move along the Y-axis direction of the base 1 until the limiting plate 42 abuts against the outer edge of the bayonet socket 20 . The position of the pipe at the bayonet 20 is limited by the limit plate 42, and cooperates with the bending block 32 on the first bending mechanism 3 to effectively prevent the bending block 32 from bending the pipe. When the bending operation is performed at the end, the middle part of the pipe is bent synchronously or a radian is generated. In addition, in the present invention, it is preferable to arrange the limiting plate 42 in the middle of the pipe placing frame 2, so as to ensure that the pipe is evenly stressed during the bending process.

As shown in FIG. 2 to FIG. 3 , the base 1 is further provided with a fixing seat 105 , and the fixing seat 105 is located at the rear side of the pipe placing frame 2 and is engaged with the pipe placing frame 2 . A gap is formed between the supporting surface of the fixing seat 105 and the base 1 , the driving assembly 40 of the limit mechanism 4 is located below the fixing seat 105 , and the cylinder shaft thereof passes through the gap. The expansion and contraction direction of the drive assembly 40 is opposite to the expansion and contraction direction of the drive cylinder 31, that is, when the cylinder shaft of the drive assembly 40 is stretched out, the limiting plate 42 is driven to move to the outer edge of the base 1; The cylinder shaft of the driving assembly 40 shrinks, driving the limiting plate 42 to move towards the pipe placement frame 2 . The advantage of this design is that it makes the overall structure of the pipe stretch bending equipment more compact, and minimizes the footprint of the base 1 to improve space utilization.

As shown in FIG. 2 , a mounting bracket 50 for placing the second bending mechanism 5 is fixed on the fixing base 105 . The second bending mechanism 5 includes a Y-axis moving mechanism 51 arranged on the installation frame 50 , and a Z-axis moving mechanism 52 arranged on the Y-axis moving mechanism 51 . Specifically, a second fixed seat 520 is arranged above the Y-axis moving mechanism 51, and the Z-axis moving mechanism 52 is fixed on the second fixed seat 520; the Y-axis moving mechanism 51 drives the second fixed seat 520 to The base 520 moves relative to the installation frame 50 along the Y-axis direction of the base 1 .

As shown in FIG. 2 and FIG. 6 , the Z-axis moving mechanism 52 is provided with a jaw mounting frame 521 and a clamping mechanism 522 . The jaw mounting frame 521 includes a main body fixed on the Z-axis moving mechanism 52, and a mounting portion corresponding to the shape and size of the pipe after the first bending; the clamping mechanism 522 is arranged on the clamp Both sides of the mounting part of the claw mounting bracket 521 . In the present invention, it is preferable to design both the Y-axis moving mechanism 51 and the Z-axis moving mechanism 52 as linear modules. Of course, in addition to the linear modules, it is also possible to use the ones disclosed in the prior art that can provide linear movement functions. Components are replaced and will not be repeated here.

The distance from the clamping mechanism 522 to the main body of the clamping jaw mounting frame 521 is equivalent to the distance from the bayonet 20 to the upper surface of the Y-axis moving mechanism 51 . Therefore, when the Z-axis moving mechanism 52 drives the jaw mounting frame 521 and the clamping mechanism 522 to move downward until the main body of the jaw mounting frame 521 is located at the bottom end of the Z-axis moving mechanism 52 At this time, the clamping structure 522 is located outside the bayonet socket 20; that is, the clamping mechanism 522 is driven by the Z-axis moving mechanism 52 to move toward the pipe placement frame 2 until the clamping mechanism 522 moves to the outside of the bending block 32; and then activates the clamping mechanism 522 to clamp the pipe.

As shown in FIG. 3 , the bending block 32 also includes at least one plane, which has a smooth transition to the bending surface 321 , and this plane is the outer surface of the bending block 32 . Since the outer side of the bending block 32 is a plane, after the clamping mechanism 522 clamps the pipe, start the Y-axis moving mechanism 51 to drive the clamping mechanism 522 to the opening of the bayonet socket 20 Direction movement until the clamping mechanism 522 abuts against the outer plane of the bending block 32; the outer surface of the pipe is attached to the bending surface 321 of the bending block 32, and the second bending of the pipe is completed. Bending; at the same time, a third bend is formed between the pipe located outside the bending block 32 and the outer plane of the bending block 32 under the force of the clamping mechanism 522 . Since the position of the pipe is fixed after each bending, the forming stability is high.

Most of the existing processing of pipes as shown in Figure 1 adopts cold bending methods, such as winding, push bending, pressing bending, rolling bending, stretch bending and so on. This processing method is affected by the bending moment during the bending process of the pipe. The outer side of the curved cross-section is continuously thinned by the bending force, and the inner side is continuously thickened. When the change of the pipe wall thickness exceeds the material performance limit, the outer side will be Cracks will occur, and wrinkles will occur on the inside due to instability. However, in the present invention, the pipe material is processed by stretch bending through the first bending mechanism 3 and the second bending mechanism 5, so that the pipe material is plastically deformed and bent into a workpiece with the required curvature, shape and size, thereby improving the resistance of the material. Capability to buckle to avoid creases on the inside of the tube. In addition, because the first bending mechanism 3 and the second bending mechanism 5 are both symmetrical structures, after the two operations are completed, the pipe can be bent in pairs symmetrically in six steps; the integration degree is high, and the bending efficiency is improved.

The following is a brief description of the use method of the pipe stretch bending equipment disclosed by the present invention. The specific operation steps are as follows:

S1, start the limit mechanism 4, drive the limit plate 42 to move along the Y-axis direction of the base 1, until the limit plate 42 abuts against the outer edge of the pipe placement frame 2, and limits the pipe in the bayonet 20 ;

S2, start the first bending mechanism 3, drive the bending block 32 and the limit block 33 to move toward the bayonet socket 20 until the limit block 33 abuts against the bottom surface 201 of the bayonet socket 20; and the The bending block 32 performs a bending operation on the pipe material, so that the pipe material is completely attached to the bayonet 20; the first bending operation of the pipe material is completed;

S3, start the Z-axis moving mechanism 52, drive the jaw mounting frame 521 and the clamping mechanism 522 to move toward the base 1, until the clamping mechanism 522 is located at both ends of the pipe placement frame 2;

S4, start the clamping mechanism 522, and clamp the pipe placed on the pipe placement rack 2;

S5, start the Y-axis moving mechanism 51, drive the clamping mechanism 522 and the pipe to move toward the bending block 32, until the clamping mechanism 522 abuts against the outer plane of the bending block 32;

S6, sequentially reset the clamping mechanism 522, the Z-axis moving mechanism 52, the Y-axis moving mechanism 51, the first bending mechanism 3 and the limiting mechanism 4 to their initial positions.

S7, sequentially reset the first bending mechanism 3 and the limit mechanism 4 to their initial positions, and take out the bent pipe to complete the blanking operation of the pipe.

In addition, after the six-way bending of the pipe is completed, the pipe can also be clamped by the clamping mechanism 522 and driven to move to the Z-axis and 52 is reset, and then the clamping mechanism 522 will loosen the pipe And complete the pipe blanking operation after bending.

There are still many implementations in the present invention, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims (10)

1. Pipe stretch bending equipment, characterized in that: it includes a base (1), on which a pipe placement frame (2) is arranged; the outer edge of the pipe placement frame (2) is arc-shaped, And its outer edge is formed with a bayonet (20) for clamping pipes; the two ends of the support surface (201) of the bayonet (20) are located inside the two ends of the pipe placement frame (2), and the two ends A gap is formed between them; the two ends of the bayonet (20) are provided with a first bending mechanism (3), and the first bending mechanism (3) includes a bending block (32) for bending the pipe and a limit block (33); the limit block (33) partially protrudes from the bending surface (321) of the bending block (32), and is located at the gap; on the base (1) A limit mechanism (4) is also provided, and the limit mechanism (4) includes a drive assembly (40) and a limit plate (42); the limit plate (42) is located outside the pipe placement frame (2) , and is driven by the driving assembly (40) to move along the Y-axis direction of the base (1) until the limiting plate (42) abuts against the outer edge of the bayonet socket (20). 2. The pipe stretch bending equipment according to claim 1, characterized in that: the first bending mechanism (3) is symmetrically arranged on both sides of the limit mechanism (4); The bending block (32) is a drive cylinder (31) for reciprocating movement along the Y-axis direction of the base (1). 3. The pipe stretch bending equipment according to claim 2, characterized in that: the bending surface (321) of the bending block (32) is arc-shaped, and the highest point of the bending surface (321) is located at The outside of the end of the pipe placing frame (2); the height of the bending block (32) is not less than the height of the pipe placing frame (2). 4. The pipe stretch bending equipment according to claim 1, characterized in that: the limit mechanism (4) is located between the pipe placement frame (2) and the base plate (1); the drive assembly ( 40) is a cylinder, and when the cylinder shaft is stretched out, it drives the limiting plate (42) to move toward the outer edge of the base (1); the cylinder shaft of the driving assembly (40) contracts to drive the limiting plate (42) The bit plate (42) moves toward the pipe placement frame (2). 5. The pipe stretch bending equipment according to claim 4, characterized in that: at least two support columns (102) are fixed between the base (1) and the pipe placement frame (2), and the drive The assembly (40) is located between the two supporting columns (102), and the height of the supporting columns (102) is not less than the height of the driving assembly (40). 6. The pipe stretch bending equipment according to claim 1, characterized in that: the base (1) is also provided with a fixing seat (105), and the fixing seat (105) is located on the side of the pipe placing frame (2). The rear side, and is clamped with the pipe placement frame (2); the mounting frame (50) for placing the second bending mechanism (5) is fixed on the fixing seat (105); the second bending mechanism (5) including a Y-axis moving mechanism (51) arranged on the mounting frame (50), and a Z-axis moving mechanism (52) arranged on the Y-axis moving mechanism (51); the Z-axis moving The mechanism (52) is provided with a clamping mechanism (522); the clamping mechanism (522) is driven by the Z-axis moving mechanism (52) to move to the pipe placement frame (2) until the clamp The holding mechanism (522) moves to the outside of the bending block (32) and clamps the pipe. 7. The pipe stretch bending equipment according to claim 6, characterized in that: the Z-axis moving mechanism (52) is also provided with a jaw mounting frame (521), and the clamping mechanism (522) is arranged on the The two sides of the jaw mounting frame (521); the distance from the clamping mechanism (522) to the main body of the jaw mounting frame (521) is the same as the distance from the bayonet (20) to the Y-axis moving mechanism (51) The distance from the upper surface is equivalent; the outer side of the bending block (32) is a plane, and it has a circular arc transition with the bending surface (321); the Y-axis moving mechanism (51) drives the The clamping mechanism (522) moves toward the opening direction of the bayonet socket (20) until the clamping mechanism (522) abuts against the outer plane of the bending block (32). 8. The pipe stretch bending equipment according to claim 7, characterized in that: the Y-axis moving mechanism (51) is a linear moving component; a second fixed seat (520) is arranged above the Y-axis moving mechanism (51) ), the Z-axis moving mechanism (52) is fixed on the second fixed seat (520); the Y-axis moving mechanism (51) drives the second fixed seat (520) relative to the mounting frame (50 ) moves along the Y-axis direction of the base (1). 9. The method of using the pipe stretch bending equipment, characterized in that: comprising the pipe stretch bending equipment described in any one of claims 1-8, and the following operating steps: S1, start the limit mechanism (4), drive the limit plate (42) to move along the Y-axis direction of the base (1), until the limit plate (42) abuts against the outer edge of the pipe placement frame (2) , and limit the pipe to the bayonet (20); S2, start the first bending mechanism (3), drive the bending block (32) and the limit block (33) to move to the bayonet (20), until the limit block (33) and the bayonet ( The bottom surface (201) of 20) is abutted; and the pipe is bent by the bending block (32), so that the pipe is completely attached to the bayonet (20); S3, sequentially reset the first bending mechanism (3) and the limiting mechanism (4) to their initial positions. 10. The method of using the pipe stretch bending equipment according to claim 9, further comprising the following steps: S1, start the Z-axis moving mechanism (52), drive the jaw mounting frame (521) and the clamping mechanism (522) to move toward the base (1), until the clamping mechanism (522) is positioned on the pipe placement frame (2 ) at both ends; S2, start the clamping mechanism (522), and clamp the pipe placed on the pipe placement rack (2); S3, start the Y-axis moving mechanism (51), drive the clamping mechanism (522) and the pipe to move to the bending block (32), until the outside plane of the clamping mechanism (522) and the bending block (32) Abut; S4, sequentially reset the clamping mechanism (522), the Z-axis moving mechanism (52), the Y-axis moving mechanism (51), the first bending mechanism (3) and the limiting mechanism (4) to their initial positions.

Images