Numerical control pipe bending device for stainless steel pipe fitting

Abstract

The utility model relates to the technical field of stainless steel pipe fitting machining, and discloses a stainless steel pipe fitting numerical control pipe bending device which comprises a U-shaped frame, a shaft seat is fixedly mounted on the inner wall of the bottom of the U-shaped frame, a stand column is rotatably mounted at the top of the shaft seat, and a bearing plate is fixedly mounted at the top of the stand column; an I-shaped bending guide wheel is detachably installed and fixed to the top of the bearing plate, a supporting beam is fixedly installed on the inner wall of the rear side of the U-shaped frame, a pipe conveying and clamping mechanism is arranged at the front end of the supporting beam and used for horizontally and linearly conveying and preliminarily clamping stainless steel pipes, and a pipe bending and clamping mechanism is arranged in the U-shaped frame. Compared with the prior art, the pipe bending device has the following advantages and effects that the stainless steel pipe fitting can be horizontally and linearly conveyed, in the bending process, the stainless steel pipe fitting is secondarily clamped and fixed, the situation that the stainless steel pipe fitting shifts or deviates in the bending machining process can be avoided, and the pipe bending machining precision is greatly improved.

Description

A CNC pipe bending device for stainless steel pipe fittings Technical Field

[0001] This application relates to the field of stainless steel pipe processing technology, and in particular to a CNC pipe bending device for stainless steel pipes. Background Technology

[0002] In industrial production, stainless steel pipe fittings are widely used in many fields such as petrochemicals, aerospace, shipbuilding, and construction due to their excellent corrosion resistance and high strength. With the continuous development of industrial technology, increasingly higher requirements are being placed on the shape accuracy, dimensional accuracy, and surface quality of stainless steel pipe fittings. CNC pipe bending equipment is often used to bend straight stainless steel pipe fittings into the required stainless steel bends.

[0003] In the existing technology, CNC pipe bending equipment on the market generally has the problem of poor clamping and fixing effect when processing stainless steel pipes. Most CNC pipe bending equipment only uses a single clamping mechanism to position the pipes and fixes the pipes by single-sided or simple two-point clamping. During the bending process, due to the large bending moment, the pipes are prone to axial displacement or radial offset, which will reduce the processing accuracy of stainless steel pipe bending.

[0004] Therefore, we propose a CNC pipe bending device for stainless steel pipe fittings to solve the above problems. Summary of the Invention

[0005] The purpose of this application is to provide a CNC pipe bending device for stainless steel pipes, which can perform secondary clamping and fixing of stainless steel pipes, and can avoid displacement or offset of stainless steel pipes during the bending process, thereby greatly improving the bending accuracy.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a CNC pipe bending device for stainless steel pipe fittings, comprising a U-shaped frame, a bearing seat fixedly installed on the bottom inner wall of the U-shaped frame, a column rotatably installed on the top of the bearing seat, a bearing plate fixedly installed on the top of the column, an I-shaped bending guide wheel detachably installed on the top of the bearing plate, a support beam fixedly installed on the rear inner wall of the U-shaped frame, and a pipe fitting conveying and clamping mechanism provided at the front end of the support beam. The pipe fitting conveying and clamping mechanism is used for horizontal linear conveying and initial clamping of stainless steel pipe fittings. A pipe bending and clamping mechanism is provided, which is used for secondary clamping and bending of stainless steel pipes. The pipe conveying and clamping mechanism includes a U-shaped plate, a drive adjustment component one, and two transverse conveying rollers. The U-shaped plate is fixedly installed at the front end of the support beam. The drive adjustment component one is set on the U-shaped plate, and the two transverse conveying rollers are both set on the drive adjustment component one. The pipe bending and clamping mechanism includes a drive adjustment component two and two vertical clamping rollers. The drive adjustment component two is set on the top inner wall of the U-shaped frame, and the two vertical clamping rollers are both set on the drive adjustment component two.

[0007] A further provision of this application is as follows: an external threaded post is fixedly installed at the top center of the bearing plate, an I-shaped bending guide wheel is movably sleeved on the external threaded post, the bottom surface of the I-shaped bending guide wheel contacts the top surface of the bearing plate, a spring washer is movably sleeved on the external threaded post, the bottom surface of the spring washer abuts against the top surface of the I-shaped bending guide wheel, an external thread is provided at the top of the external threaded post, and a locking nut is threaded on the external threaded post, the bottom surface of the locking nut abuts against the top surface of the spring washer.

[0008] A further feature of this application is that two positioning pins are fixedly installed on the top of the bearing plate, and two positioning grooves are opened at the bottom of the I-shaped bending guide wheel, with the two positioning pins slidably installed in the corresponding positioning grooves.

[0009] A further configuration of this application is as follows: the drive adjustment assembly includes a bidirectional lead screw, two movable seats, two motors, two rotating shafts, and a second motor. The bidirectional lead screw is rotatably mounted inside the U-shaped plate. The two movable seats are threaded onto the bidirectional lead screw and arranged symmetrically. The two motors are respectively fixedly mounted on the front sidewall of the corresponding movable seats. The two rotating shafts are respectively fixedly mounted on the output shaft end of the corresponding motors. The two transverse conveying rollers are respectively fixedly mounted on the corresponding rotating shafts. The second motor is fixedly mounted on the top of the U-shaped plate, and the output shaft end of the second motor is fixedly connected to the top end of the bidirectional lead screw.

[0010] A further feature of this application is that anti-slip rubber sleeves are fixedly fitted on both transverse conveyor rollers.

[0011] A further feature of this application is that a vertical guide rod is fixedly installed inside the U-shaped plate, and a movable seat is slidably sleeved on the vertical guide rod.

[0012] A further configuration of this application is as follows: the drive adjustment assembly 2 includes a motor 3, a crossbeam, a bidirectional lead screw 2, two movable seats 2, and a motor 4. The motor 3 is fixedly installed on the top inner wall of the U-shaped frame, the crossbeam is fixedly installed on the output shaft end of the motor 3, and the axis of the column coincides with the axis of the output shaft of the motor 3. A rectangular hole is opened on the top of the crossbeam, and the bidirectional lead screw 2 is rotatably installed in the rectangular hole. The two movable seats 2 are threaded on the bidirectional lead screw 2 and are arranged symmetrically. Two vertical clamping rollers are respectively fixedly installed on the bottom of the corresponding movable seats 2. The motor 4 is fixedly installed on the front outer wall of the crossbeam, and the output shaft end of the motor 4 is fixedly connected to the front end of the bidirectional lead screw 2.

[0013] A further feature of this application is that anti-slip rubber sleeves are fixedly fitted on both vertical clamping rollers.

[0014] A further feature of this application is that a horizontal guide rod is fixedly installed inside the rectangular hole, and the second movable seat is sleeved on the horizontal guide rod.

[0015] A further provision of this application is that: a pointer is fixedly installed on the top of the crossbeam, and two hanging rods are fixedly installed on the top inner wall of the U-shaped frame, with the same scale ring fixedly installed at the bottom end of the two hanging rods, and the pointer is located on the right side of the scale ring.

[0016] This application includes at least one of the following beneficial technical effects:

[0017] 1. Under the synergistic effect of the pipe fitting conveying and clamping mechanism and the pipe fitting bending and clamping mechanism, this application can convey stainless steel pipe fittings horizontally in a straight line. Furthermore, during the bending process, the stainless steel pipe fittings are clamped and fixed a second time, which can prevent the stainless steel pipe fittings from shifting or deviating during the bending process, thus greatly improving the bending accuracy.

[0018] 2. This application utilizes anti-slip rubber sleeve one and anti-slip rubber sleeve two, which can not only enhance the friction with stainless steel pipe fittings and prevent slippage during conveying and clamping, but also avoid direct contact between stainless steel parts and the transverse conveying roller and vertical clamping roller, thus preventing scratches on their outer surface.

[0019] 3. This application utilizes the combination of pointer and scale ring to display the bending angle in real time, which facilitates operators to accurately control the bending parameters and further improves processing accuracy. Attached Figure Description

[0020] Figure 1 is a front-view stereoscopic structural diagram of this embodiment.

[0021] Figure 2 is a front-view three-dimensional structural diagram of the column and the supporting plate.

[0022] Figure 3 is a three-dimensional structural diagram of the I-shaped bending guide wheel viewed from below.

[0023] Figure 4 is a three-dimensional structural diagram of the pipe fitting conveying and clamping mechanism.

[0024] Figure 5 is a three-dimensional structural diagram of the pipe bending and clamping mechanism.

[0025] In the diagram, 1. U-shaped frame; 2. Shaft seat; 3. Column; 4. Bearing plate; 5. I-beam bending guide wheel; 6. External threaded column; 7. Spring washer; 8. Locking nut; 9. Locating pin; 10. Locating groove; 11. Support beam; 12. Pipe fitting conveying and clamping mechanism; 13. Pipe fitting bending and clamping mechanism; 14. Hanging rod; 15. Scale ring; 121. U-shaped plate; 122. Double-acting lead screw one; 123. Moving seat one; 24. Motor 1; 125. Rotating shaft; 126. Horizontal conveyor roller; 127. Motor 2; 128. Anti-slip rubber sleeve 1; 129. Vertical guide rod; 131. Motor 3; 132. Crossbeam; 133. Rectangular hole; 134. Two-way lead screw 2; 135. Moving seat 2; 136. Vertical clamping roller; 137. Motor 4; 138. Anti-slip rubber sleeve 2; 139. Horizontal guide rod; 1310. Pointer. Detailed Implementation

[0026] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] Referring to Figures 1-5, this application provides a CNC pipe bending device for stainless steel pipe fittings, including a U-shaped frame 1. A bearing seat 2 is fixedly installed on the bottom inner wall of the U-shaped frame 1. A column 3 is rotatably installed on the top of the bearing seat 2. A bearing plate 4 is fixedly installed on the top of the column 3. An I-shaped bending guide wheel 5 is detachably installed and fixed on the top of the bearing plate 4. A support beam 11 is fixedly installed on the rear inner wall of the U-shaped frame 1. A pipe fitting conveying and clamping mechanism 12 is provided at the front end of the support beam 11. The pipe fitting conveying and clamping mechanism 12 is used for horizontal linear conveying and initial clamping of stainless steel pipe fittings. A pipe fitting bending and clamping mechanism 13 is provided inside the U-shaped frame 1. The pipe fitting bending and clamping mechanism 13 is used for secondary clamping and bending processing of stainless steel pipe fittings.

[0028] In this embodiment, the pipe fitting conveying and clamping mechanism 12 includes a U-shaped plate 121, a drive adjustment assembly 1, and two transverse conveying rollers 126. The U-shaped plate 121 is fixedly installed on the front end of the support beam 11. The drive adjustment assembly 1 is disposed on the U-shaped plate 121, and both transverse conveying rollers 126 are disposed on the drive adjustment assembly 1. The drive adjustment assembly 1 includes a bidirectional lead screw 122, two movable seats 123, two motors 124, two rotating shafts 125, and a second motor 127. The bidirectional lead screw 122 is rotatably installed inside the U-shaped plate 121. Two movable seats 123 are threaded onto the bidirectional lead screw 122 and arranged symmetrically. Two motors 124 are respectively fixedly mounted on the front side wall of the corresponding movable seats 123. Two rotating shafts 125 are respectively fixedly mounted on the output shaft ends of the corresponding motors 124. Two transverse conveying rollers 126 are respectively fixedly mounted on the corresponding rotating shafts 125. A second motor 127 is fixedly mounted on the top of the U-shaped plate 121. The output shaft end of the second motor 127 is fixedly connected to the top end of the bidirectional lead screw 122. Both transverse conveying rollers 126 are... The fixed sleeve is equipped with an anti-slip rubber sleeve 128. Two motors 124 can control the rotation of their respective rotating shafts 125, making the two rotating shafts 125 rotate synchronously relative to each other. This causes the two transverse conveyor rollers 126 to rotate with their respective rotating shafts 125. A second motor 127 can control the rotation of a bidirectional lead screw 122, which in turn controls the movement of the two movable seats 123 towards or away from each other, thus adjusting the distance between the two transverse conveyor rollers 126. Under the action of the synchronous relative rotation of the two transverse conveyor rollers 126 and in coordination with... Two anti-slip rubber sleeves 128 can perform horizontal linear conveying of stainless steel pipe fittings. In addition, with the cooperation of two transverse conveying rollers 126 and the two anti-slip rubber sleeves 128, the stainless steel pipe fittings can also be initially clamped and positioned to avoid displacement or offset of the stainless steel pipe fittings during bending. The design of the anti-slip rubber sleeves 128 can not only enhance the friction with the stainless steel pipe fittings and prevent slippage during conveying and clamping, but also prevent the stainless steel parts from directly contacting the transverse conveying rollers 126 and causing scratches on their outer surface.

[0029] In this embodiment, the pipe bending and clamping mechanism 13 includes a second drive adjustment component and two vertical clamping rollers 136. The second drive adjustment component is disposed on the top inner wall of the U-shaped frame 1, and the two vertical clamping rollers 136 are disposed on the second drive adjustment component. The second drive adjustment component includes a third motor 131, a crossbeam 132, a second bidirectional lead screw 134, two second movable seats 135, and a fourth motor 137. The third motor 131 is fixedly installed on the top inner wall of the U-shaped frame 1, and the crossbeam 132 is fixedly installed on the output shaft end of the third motor 131. The axis of column 3 coincides with the axis of the output shaft of motor 3 131. A rectangular hole 133 is opened at the top of the crossbeam 132. The double-acting lead screw 2 134 is rotatably installed in the rectangular hole 133. Two moving seats 2 135 are threaded onto the double-acting lead screw 2 134 and are arranged symmetrically. Two vertical clamping rollers 136 are respectively fixedly installed at the bottom of the corresponding moving seats 2 135. Motor 4 137 is fixedly installed on the front outer wall of the crossbeam 132. The output shaft end of motor 4 137 is fixedly connected to the front end of the double-acting lead screw 2 134. Each vertical clamping roller 136 is fixedly fitted with an anti-slip rubber sleeve 138. The motor 137 controls the rotation of the bidirectional lead screw 134, which in turn controls the movement of the two moving seats 135 towards or away from each other. This allows adjustment of the distance between the two vertical clamping rollers 136. With the synergistic action of the two vertical clamping rollers 136 and the two anti-slip rubber sleeves 138, the stainless steel pipe fitting can be clamped a second time, further preventing displacement or offset of the stainless steel pipe fitting during bending. The motor 131 controls the rotation of the crossbeam 132, which in turn causes the two vertical clamping rollers 136 to rotate around the column 3. Under the combined action of the two vertical clamping rollers 136 and with the help of the I-shaped bending guide roller 5, stainless steel pipes can be bent to produce the required stainless steel bent pipes. The anti-slip rubber sleeve 138 is designed to enhance the friction with the stainless steel pipes, prevent slippage during conveying and clamping, and avoid direct contact between the stainless steel parts and the transverse conveying roller 126, which could cause scratches on its outer surface.

[0030] In this embodiment, an external threaded post 6 is fixedly installed at the top center of the bearing plate 4. An I-shaped bending guide wheel 5 is movably sleeved on the external threaded post 6. The bottom surface of the I-shaped bending guide wheel 5 is in contact with the top surface of the bearing plate 4. A spring washer 7 is movably sleeved on the external threaded post 6. The bottom surface of the spring washer 7 abuts against the top surface of the I-shaped bending guide wheel 5. An external thread is provided at the top of the external threaded post 6. A locking nut 8 is threaded on the external threaded post 6. The bottom surface of the locking nut 8 abuts against the top surface of the spring washer 7. By using the threaded connection between the locking nut 8 and the external threaded post 6, and in conjunction with the use of the spring washer 7, the I-shaped bending guide wheel 5 can be locked and fixed on the bearing plate 4, which also facilitates the convenient disassembly, replacement or maintenance of the I-shaped bending guide wheel 5.

[0031] In this embodiment, two positioning pins 9 are fixedly installed on the top of the bearing plate 4, and two positioning grooves 10 are opened at the bottom of the I-shaped bending guide wheel 5. The two positioning pins 9 are slidably installed in the corresponding positioning grooves 10. By using the sliding insertion and cooperation between the positioning pins 9 and the positioning grooves 10, the installation position of the I-shaped bending guide wheel 5 can be positioned to ensure that the bearing plate 4, the column 3 and the I-shaped bending guide wheel 5 rotate synchronously.

[0032] In this embodiment, a vertical guide rod 129 is fixedly installed inside the U-shaped plate 121, and the movable seat 123 is slidably sleeved on the vertical guide rod 129, which can guide the movement direction of the movable seat 123 and ensure that the movable seat 123 moves smoothly and steadily in the vertical direction.

[0033] In this embodiment, a horizontal guide rod 139 is fixedly installed inside the rectangular hole 133, and the second movable seat 135 is sleeved on the horizontal guide rod 139, which can guide the movement direction of the second movable seat 135 and ensure that the second movable seat 135 can move smoothly and steadily in the horizontal direction.

[0034] In this embodiment, a pointer 1310 is fixedly installed on the top of the crossbeam 132, and two hanging rods 14 are fixedly installed on the top inner wall of the U-shaped frame 1. The same scale ring 15 is fixedly installed at the bottom end of the two hanging rods 14. The pointer 1310 is located on the right side of the scale ring 15. By using the cooperation between the pointer 1310 and the scale ring 15, the bending angle can be displayed in real time, which makes it easier for operators to accurately control the bending parameters and further improve the processing accuracy.

[0035] In this embodiment, it should be noted that motor 124, motor 2 127, motor 3 131 and motor 4 137 can all be purchased on the market. The two motors 124 are of the same model and are set in opposite directions. Both motors 124 are self-locking motors. Motors 2 127, motor 3 131 and motor 4 137 are all self-locking motors that can rotate in both directions. Their wiring connection method and control method are mature technologies in the field and are fully disclosed. Therefore, they will not be described in detail here.

[0036] With the above structure, the CNC pipe bending device for stainless steel pipes provided in this application allows the operator to insert the stainless steel pipe to be processed horizontally from the left side of the U-shaped frame 1 between two anti-slip rubber sleeves 128, ensuring the stainless steel pipe is in contact with the middle of the rear outer wall of the I-shaped bending guide roller 5. By controlling the motor 127 to drive the bidirectional lead screw 122 to rotate in the forward direction, the two moving seats 123 can be controlled to move closer to each other, gradually reducing the distance between the two transverse conveying rollers 126. When both anti-slip rubber sleeves 128 are in tight contact with the outer wall of the stainless steel pipe, the motor 127 is stopped, and then the two motors 124 (rotating in opposite directions and synchronously) are controlled to run. The output shaft of motor 124 drives the corresponding rotating shaft 125 to rotate, which causes the two transverse conveying rollers 126 to rotate relative to each other. By using the friction between the anti-slip rubber sleeve 128 and the surface of the pipe, the stainless steel pipe can be conveyed horizontally and linearly from left to right. The left end of the stainless steel pipe will gradually pass between the two anti-slip rubber sleeves 138. When the part of the stainless steel pipe that needs to be bent is moved to the middle part of the rear outer wall of the I-shaped bending guide wheel 5, the operation of the two motors 124 is stopped. At this time, under the synergistic action of the two transverse conveying rollers 126 and the two anti-slip rubber sleeves 128, the stainless steel pipe can be initially clamped to avoid displacement or offset of the stainless steel pipe during the bending process.

[0037] Next, the control motor 137 rotates forward. The output shaft of the motor 137 drives the bidirectional lead screw 134 to rotate, which in turn controls the two moving seats 135 to move closer to each other. The distance between the two vertical clamping rollers 136 gradually decreases. When both anti-slip rubber sleeves 138 are in tight contact with the outer wall of the stainless steel pipe, the motor 137 stops running. Under the synergistic action of the two vertical clamping rollers 136 and the two anti-slip rubber sleeves 138, the stainless steel pipe can be clamped a second time, further preventing the stainless steel pipe from being bent during the bending process. If the component shifts or deviates, the motor 131 drives the crossbeam 132 to rotate in the forward direction, which in turn causes the two vertical clamping rollers 136 to rotate around the column 3. Under the combined action of the two vertical clamping rollers 136 and with the help of the I-shaped bending guide wheel 5, the stainless steel pipe can be bent to produce the required stainless steel bent pipe. During the bending process, the bending angle can be seen in real time by pointing the pointer 1310 to the scale line of the scale ring 15, which makes it easy for the operator to accurately control the bending parameters and improve the processing accuracy.

[0038] When bending the stainless steel pipe fitting into the desired angle, stop the operation of motor three 131, then control motor four to reverse, which will gradually increase the distance between the two vertical clamping rollers 136. Then control motor two to reverse, which will gradually increase the distance between the two horizontal conveying rollers. The processed stainless steel pipe fitting can then be removed. Following the above operation steps, the next stainless steel pipe fitting can be bent to form a stainless steel pipe fitting.

Claims

1. A CNC pipe bending device for stainless steel pipe fittings, characterized in that, The system includes a U-shaped frame (1), a bearing seat (2) fixedly installed on the bottom inner wall of the U-shaped frame (1), a column (3) rotatably installed on the top of the bearing seat (2), a bearing plate (4) fixedly installed on the top of the column (3), an I-shaped bending guide wheel (5) detachably installed on the top of the bearing plate (4), a support beam (11) fixedly installed on the rear inner wall of the U-shaped frame (1), a pipe fitting conveying and clamping mechanism (12) provided at the front end of the support beam (11), the pipe fitting conveying and clamping mechanism (12) being used for horizontal linear conveying and preliminary clamping of stainless steel pipe fittings, and a pipe fitting bending and clamping mechanism (13) provided inside the U-shaped frame (1), the pipe fitting bending and clamping mechanism (13) being used for For secondary clamping and bending of stainless steel pipe fittings, the pipe fitting conveying and clamping mechanism (12) includes a U-shaped plate (121), a drive adjustment component one, and two transverse conveying rollers (126). The U-shaped plate (121) is fixedly installed at the front end of the support beam (11). The drive adjustment component one is set on the U-shaped plate (121), and the two transverse conveying rollers (126) are both set on the drive adjustment component one. The pipe fitting bending and clamping mechanism (13) includes a drive adjustment component two and two vertical clamping rollers (136). The drive adjustment component two is set on the top inner wall of the U-shaped frame (1), and the two vertical clamping rollers (136) are both set on the drive adjustment component two.

2. The CNC pipe bending device for stainless steel pipe fittings according to claim 1, characterized in that: An external threaded post (6) is fixedly installed at the top center of the bearing plate (4). The I-shaped bending guide wheel (5) is movably sleeved on the external threaded post (6). The bottom surface of the I-shaped bending guide wheel (5) is in contact with the top surface of the bearing plate (4). A spring washer (7) is movably sleeved on the external threaded post (6). The bottom surface of the spring washer (7) abuts against the top surface of the I-shaped bending guide wheel (5). The top of the external threaded post (6) is provided with an external thread. A locking nut (8) is threaded on the external threaded post (6). The bottom surface of the locking nut (8) abuts against the top surface of the spring washer (7).

3. The CNC pipe bending device for stainless steel pipe fittings according to claim 2, characterized in that: Two positioning pins (9) are fixedly installed on the top of the bearing plate (4), and two positioning grooves (10) are opened at the bottom of the I-shaped bending guide wheel (5). The two positioning pins (9) are slidably installed in the corresponding positioning grooves (10).

4. The CNC pipe bending device for stainless steel pipe fittings according to claim 1, characterized in that: The drive adjustment assembly includes a bidirectional lead screw (122), two movable seats (123), two motors (124), two rotating shafts (125), and a second motor (127). The bidirectional lead screw (122) is rotatably mounted inside the U-shaped plate (121). The two movable seats (123) are threaded onto the bidirectional lead screw (122) and arranged symmetrically. The two motors (124) are respectively fixedly mounted on the front side wall of the corresponding movable seat (123). The two rotating shafts (125) are respectively fixedly mounted on the output shaft end of the corresponding motor (124). The two transverse conveying rollers (126) are respectively fixedly mounted on the corresponding rotating shaft (125). The second motor (127) is fixedly mounted on the top of the U-shaped plate (121), and the output shaft end of the second motor (127) is fixedly connected to the top end of the bidirectional lead screw (122).

5. The CNC pipe bending device for stainless steel pipe fittings according to claim 4, characterized in that: Both of the transverse conveying rollers (126) are fixedly fitted with anti-slip rubber sleeves (128).

6. The CNC pipe bending device for stainless steel pipe fittings according to claim 4, characterized in that: A vertical guide rod (129) is fixedly installed inside the U-shaped plate (121), and the movable seat (123) is slidably sleeved on the vertical guide rod (129).

7. The CNC pipe bending device for stainless steel pipe fittings according to claim 1, characterized in that: The second drive adjustment assembly includes a third motor (131), a crossbeam (132), a second bidirectional lead screw (134), two second movable seats (135), and a fourth motor (137). The third motor (131) is fixedly installed on the top inner wall of the U-shaped frame (1). The crossbeam (132) is fixedly installed on the output shaft end of the third motor (131), and the axis of the column (3) coincides with the axis of the output shaft of the third motor (131). A rectangular hole (133) is provided on the top of the crossbeam (132). The second bidirectional lead screw (134) is rotatably installed in the rectangular hole (133). The two moving seats (135) are threaded onto the second bidirectional lead screw (134) and arranged symmetrically. The two vertical clamping rollers (136) are respectively fixedly installed at the bottom of the corresponding moving seats (135). The fourth motor (137) is fixedly installed on the front outer wall of the crossbeam (132). The output shaft end of the fourth motor (137) is fixedly connected to the front end of the second bidirectional lead screw (134).

8. The CNC pipe bending device for stainless steel pipe fittings according to claim 7, characterized in that: Both vertical clamping rollers (136) are fixedly fitted with anti-slip rubber sleeves (138).

9. The CNC pipe bending device for stainless steel pipe fittings according to claim 7, characterized in that: A horizontal guide rod (139) is fixedly installed inside the rectangular hole (133), and the second movable seat (135) is sleeved on the horizontal guide rod (139).

10. The CNC pipe bending device for stainless steel pipe fittings according to claim 7, characterized in that: A pointer (1310) is fixedly installed on the top of the crossbeam (132), and two hanging rods (14) are fixedly installed on the top inner wall of the U-shaped frame (1). The bottom ends of the two hanging rods (14) are fixedly installed with the same scale ring (15), and the pointer (1310) is located on the right side of the scale ring (15).

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