Numerical control machining clamping device for metal material pipe fitting

Abstract

The invention discloses a metal material pipe fitting numerical control machining clamping device, and relates to the field of metal pipe fitting machining, the metal material pipe fitting numerical control machining clamping device comprises a machining mounting base, and the top end of the machining mounting base is rotatably connected with a clamping movable rack through a rotating mechanism; a ball screw which is vertically arranged and can rotate and move around the clamping movable rack is installed and connected to the clamping movable rack, a lifting installation base which can ascend and descend along the ball screw is installed and connected to the ball screw, and a clamping installation plate which is movably arranged is installed and connected to the lifting installation base through a direction adjusting mechanism. And the clamping mounting plate is connected with a finger cylinder through a movable mechanism. The clamping device can be used for replacing an original fixed clamping device to clamp and fix a metal pipe fitting needing to be machined and detected, and the direction and position of machining and detection can be conveniently adjusted according to needs; in addition, through the clamping device, the machining and detecting efficiency can be improved, and time and cost are saved.

Description

Technical Field

[0001] The invention relates to the field of metal pipe processing, in particular to a clamping device for numerically controlled processing of metal pipes. Background Art

[0002] Metal pipe processing involves cutting, forming, welding and surface treatment of metal pipes, and is widely used in industries such as construction, automobiles, aviation, and chemicals. Quality control is crucial during the processing of metal pipes, and usually includes: 1. Dimension inspection: ensure that each pipe fitting meets the design specifications; 2. Welding inspection: Check welding quality through non-destructive testing (such as ultrasonic testing); 3. Surface quality inspection: Check the coating and treatment effect to prevent rust and other defects.

[0003] In these processing processes, metal pipes are mostly inspected by modern machinery to reduce quality errors. However, since the shape of the produced pipes is round, if they are not clamped and fixed, the round metal pipes will roll during the inspection, causing the inspection error to increase. The existing methods for fixing metal pipes are mostly to install a clamp on the inspection operation platform. Although it can play a role in limiting and fixing, it is not convenient to adjust the position and direction of the metal pipes. Processing or clamping also takes a lot of time, which reduces its production efficiency. Summary of the invention

[0004] The objective of the present invention is achieved through the following technical solutions: A clamping device for CNC machining of metal pipe fittings, comprising a machining mounting base, the machining mounting base is used to be mounted and fixed on a machining machine, the top of the machining mounting base is rotatably connected to a clamping movable frame through a rotating mechanism, a ball screw that is vertically arranged and rotatable around the clamping movable frame is mounted on the clamping movable frame, a lifting mounting seat that can be lifted and lowered along the ball screw is mounted on the ball screw, a movably arranged clamping mounting plate is mounted on the lifting mounting seat through a direction adjustment mechanism, the clamping mounting plate is mounted and connected to a finger cylinder through a movable mechanism, and a clamping claw that can be controlled by the finger cylinder and is used to clamp and limit the metal pipe fitting is mounted on the finger cylinder; The movable mechanism includes a movable rotating shaft, one end of the movable rotating shaft can rotatably pass through the clamping mounting plate through a bearing and is fixedly connected to the cylinder body of the finger cylinder through an electric rotating disc, which is used to drive the finger cylinder to rotate. The other end of the movable rotating shaft is rotatably connected to the limit top plate through a bearing. The limit top plate is used to be movably installed and connected with the lifting mounting seat, and the limit top plate is fixedly connected to the clamping mounting plate through a connecting pin.

[0005] Preferably, a movable transmission wheel is installed on the movable shaft, and the movable transmission wheel is arranged between the limiting top plate and the clamping mounting plate. The movable transmission wheel is connected to the clamping mounting plate through a movable driving device, and the movable driving device drives the movable shaft to rotate through the movable transmission wheel.

[0006] Preferably, the movable driving device includes a movable driving motor, the movable driving motor is installed and connected on the clamping mounting plate, a movable driving wheel is installed and connected on the output shaft of the movable driving motor, and the movable driving wheel is transmission-connected to a movable transmission wheel installed and connected on a movable rotating shaft through a movable conveyor belt.

[0007] Preferably, the direction adjustment mechanism comprises a direction adjustment movable shaft; One end of the direction-adjusting movable rotating shaft rotatably passes through the movable adjusting bottom plate through a bearing, and the end head passes through the limiting top plate and is connected and fixed to the clamping mounting plate, and the other end of the direction-adjusting movable rotating shaft rotatably passes through the movable adjusting top plate through a bearing and is installed and connected with a transmission device for driving the direction-adjusting movable rotating shaft to rotate; The movable adjustment bottom plate and the movable adjustment top plate are connected and fixed via a connecting pin shaft, and the movable adjustment bottom plate and the movable adjustment top plate are connected and fixed via a mounting plate and a lifting mounting seat.

[0008] Preferably, the transmission device comprises a small transmission driving wheel and a transmission connecting wheel; The transmission connecting wheel is installed and connected to the end of the direction adjustment movable shaft away from the movable adjustment bottom plate, and the transmission connecting wheel is transmission-connected to the transmission small driving wheel arranged on the end surface of the movable adjustment top plate away from the movable adjustment bottom plate through the transmission connecting belt; The transmission small driving wheel is installed and connected to the transmission connecting shaft, and one end of the transmission connecting shaft away from the transmission small driving wheel can rotatably pass through the movable adjustment top plate through a bearing and is also rotatably connected to the movable adjustment bottom plate through a bearing; The transmission connection shaft is connected with a driving device for driving the transmission connection shaft to rotate around the movable adjustment base plate.

[0009] Preferably, the drive means comprises a large drive wheel; The large driving wheel is arranged between the movable adjustment bottom plate and the movable adjustment top plate and on a side away from the direction adjustment movable rotating shaft. The large driving wheel is installed and connected to the transmission connecting shaft. The large driving wheel is connected to the small driving wheel through a driving conveyor belt transmission. The small driving wheel is installed and connected to the output shaft of the driving servo motor. The housing of the driving servo motor is fixed to the lifting mounting seat by bolts.

[0010] Preferably, one end of the ball screw is rotatably connected to the bottom end of the clamping movable frame through a bearing, the other end of the ball screw movably passes through the lifting mounting seat, and the end head is installed and connected to the output end of the electric screw machine, and the housing of the electric screw machine is fixed to the top end of the clamping movable frame by bolts; The lifting installation seat can be lifted and lowered by means of a movable limiting structure and a clamping movable frame.

[0011] Preferably, the movable limiting structure comprises a limiting guide rail; The lifting mounting seat is arranged to be lifted and movably disposed through the limiting guide rail and the clamping movable frame.

[0012] Preferably, the rotating mechanism comprises a rotating large transmission wheel and a rotating small driving wheel; The rotating large transmission wheel is provided with a rotating shaft, one end of which is rotatably arranged with the processing installation base through a bearing, and the other end of which is connected with the bottom end surface of the clamping movable frame, and the clamping movable frame is driven to rotate together by the rotation of the rotating shaft; The large rotating transmission wheel is connected to the small rotating driving wheel through a rotating conveyor belt. The small rotating driving wheel is installed on the output shaft of the rotating driving servo motor. The housing of the rotating driving servo motor is fixed on the clamping movable frame by bolts.

[0013] The beneficial effects of the present invention are as follows: the purpose of the present invention is to provide a CNC machining clamping device for metal pipe fittings, which is used to clamp and fix "round" metal pipe fittings, and the position and direction of the clamped and limited metal pipe fittings can be freely adjusted by the clamping device like a manipulator, so as to facilitate processing (including welding, deburring) and detection (including external dimensions and length). The clamping device includes a machining installation base, which is used to be installed and fixed on a machining machine, and the top of the machining installation base is rotatably connected to a clamping movable frame through a rotating mechanism, and a ball screw that is vertically arranged and can rotate around the clamping movable frame is installed on the clamping movable frame, and a lifting mounting seat that can be lifted and lowered along the ball screw is installed on the ball screw, and a movably arranged clamping mounting plate is installed on the lifting mounting seat through a direction adjustment mechanism, and the clamping mounting plate is installed and connected to a finger cylinder through a movable mechanism, and a clamping claw that can be controlled by the finger cylinder and is used to clamp and limit the metal pipe fittings is installed on the finger cylinder. By installing and fixing the clamping device at a suitable position of the processing machine, and then controlling the rotating mechanism of the clamping device, the lifting and lowering mounting seat on the ball screw, and the adjusting mechanism, the finger cylinder is driven to move to a suitable position, and the metal pipe to be processed is clamped and fixed by the clamping claw of the finger cylinder, and then according to the processing requirements, the rotating mechanism of the clamping device, the lifting and lowering mounting seat on the ball screw, and the adjusting mechanism are controlled to drive the clamping claw of the finger cylinder to clamp and fix the metal pipe to a suitable position and direction, so as to facilitate the processing and testing of the metal pipe by the processing machine. The clamping device can not only replace the original fixed clamping device to clamp and fix the metal pipe to be processed and tested, but also facilitate the adjustment of the direction and position of processing and testing according to the needs; and the clamping device can improve the efficiency of processing and testing, saving time and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a clamping device for numerically controlling a metal pipe fitting according to the present invention; Figure 2 It is an exploded schematic diagram of the structure part of a clamping device for numerically controlling a metal pipe fitting according to the present invention; Figure 3 It is a schematic diagram of the connection structure of a clamping movable frame of a clamping device for numerically controlling machining of a metal pipe fitting of the present invention; Figure 4 It is a schematic diagram of a direction adjustment mechanism of a clamping device for numerically controlled machining of a metal pipe fitting according to the present invention; Figure 5 It is a schematic diagram of the movable mechanism of a clamping device for numerically controlling machining of metal pipes of the present invention; In the figure, 1-processing and mounting base, 2-clamping movable frame, 3-lifting mounting seat, 4-clamping mounting plate, 5-finger cylinder, 11-rotating large transmission wheel, 12-rotation driving servo motor, 21-ball screw, 22-electric screw machine, 23-limiting guide rail, 31-direction adjustment movable shaft, 32-movable adjustment bottom plate, 33-movable adjustment top plate, 41-movable shaft, 42-electric rotating disc, 43-limiting top plate, 311-transmission connecting wheel, 312-transmission small driving wheel, 313-large driving wheel, 314-driving servo motor, 411-movable transmission wheel, 412-movable driving motor, 413-movable driving wheel. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] Example 1 like Figures 1 to 5 As shown, a clamping device for CNC machining of metal pipe fittings is used to clamp and fix "round" metal pipe fittings, and the position and direction of the clamped and limited metal pipe fittings can be freely adjusted by the clamping device like a manipulator, so as to facilitate machining (including welding, deburring) and testing (including external dimensions and length). The clamping device includes a machining installation base 1, which is used to be installed and fixed on a machining machine. The top of the machining installation base 1 is rotatably connected to a clamping movable frame 2 through a rotating mechanism. A ball screw 21 that is vertically arranged and can rotate around the clamping movable frame is installed and connected to the clamping movable frame 2. A lifting installation seat 3 that can be lifted and lowered along the ball screw 21 is installed and connected to the ball screw 21. A movably arranged clamping installation plate 4 is installed and connected to the lifting installation seat 3 through a direction adjustment mechanism. The clamping installation plate 4 is installed and connected to a finger cylinder 5 through a movable mechanism. A clamping claw that can be controlled by the finger cylinder 5 and is used to clamp and limit the metal pipe fitting is installed and connected to the finger cylinder 5. By installing and fixing the clamping device at a suitable position of the processing machine tool, and then controlling the rotating mechanism of the clamping device, the lifting mounting seat 3 on the ball screw 21, and the adjusting mechanism, the finger cylinder 5 is driven to move to a suitable position, and the metal pipe to be processed is clamped and fixed by the clamping claws of the finger cylinder 5. Then, according to the processing requirements, the rotating mechanism of the clamping device, the lifting mounting seat 3 on the ball screw 21, and the adjusting mechanism are controlled to drive the clamping claws of the finger cylinder 5 to clamp and fix the metal pipe to a suitable position and direction, thereby facilitating the processing and inspection of the metal pipe by the processing machine tool.

[0017] Example 2 Based on Example 1, the movable mechanism of the arrangement includes a movable rotating shaft 41, one end of the movable rotating shaft 41 can be rotatably passed through the clamping mounting plate 4 through a bearing and is fixedly connected to the cylinder body of the finger cylinder 5 through an electric rotating disc 42, and is used to drive the finger cylinder 5 to rotate. The other end of the movable rotating shaft 41 is rotatably connected to the limiting top plate 43 through a bearing. The limiting top plate 43 is used to be movably installed and connected with the lifting mounting seat 3, and the limiting top plate 43 is fixedly connected to the clamping mounting plate 4 through a connecting pin.

[0018] Meanwhile, a movable transmission wheel 411 is installed and connected to the movable shaft 41, and the movable transmission wheel 411 is arranged between the limit top plate 43 and the clamping mounting plate 4, and the movable transmission wheel 411 is connected to the clamping mounting plate 4 through a movable driving device, and the movable driving device drives the movable shaft 41 to rotate through the movable transmission wheel 411. The movable driving device includes a movable driving motor 412, which is installed and connected to the clamping mounting plate 4, and a movable driving wheel 413 is installed and connected to the output shaft of the movable driving motor 412, and the movable driving wheel 413 is connected to the movable transmission wheel 411 installed and connected to the movable shaft 41 through a movable conveyor belt.

[0019] In the embodiment, by controlling the movable driving motor 412 to start, the movable driving wheel 413 connected to the output end of the movable driving motor 412 is driven to rotate, thereby driving the movable transmission wheel 411 installed on the movable rotating shaft 41 connected through the conveyor belt transmission through the movable driving wheel 413, driving the movable rotating shaft 41 to rotate around the limiting top plate 43 and the clamping mounting plate 4, and then driving the finger cylinder 5 connected to the end of the movable rotating shaft 41 through the electric rotating disk 42 to rotate to a suitable position. After adjusting the position, it can then be lifted and moved by the lifting mounting seat 3 installed on the ball screw 21 and movable along the ball screw 21, and then the finger cylinder 5 can be moved to drive the claws on the finger cylinder 5 to clamp and fix the metal pipe.

[0020] Example 3 The direction adjustment mechanism of the arrangement includes a direction adjustment movable shaft 31; one end of the direction adjustment movable shaft 31 is rotatably passed through the movable adjustment base plate 32 through a bearing, and the end end is passed through the limit top plate 43 and is connected and fixed to the clamping mounting plate 4, the other end of the direction adjustment movable shaft 31 is rotatably passed through the movable adjustment top plate 33 through a bearing, and is installed and connected with a transmission device for driving the direction adjustment movable shaft 31 to rotate; the movable adjustment base plate 32 and the movable adjustment top plate 33 are connected and fixed by a connecting pin shaft, and the movable adjustment base plate 32 and the movable adjustment top plate 33 are connected and fixed to the lifting mounting seat 3 through a mounting plate.

[0021] In addition, the transmission device includes a small transmission driving wheel 312 and a transmission connecting wheel 311; the transmission connecting wheel 311 is installed and connected to one end of the direction adjustment movable shaft 31 away from the movable adjustment base plate 31, and the transmission connecting wheel 311 is transmission-connected to the small transmission driving wheel 312 arranged on one end face of the movable adjustment top plate 33 away from the movable adjustment base plate 32 through a transmission connecting belt; the small transmission driving wheel 312 is installed and connected to a transmission connecting shaft, and one end of the transmission connecting shaft away from the small transmission driving wheel 312 can rotatably pass through the movable adjustment top plate 33 through a bearing and is also rotationally connected to the movable adjustment base plate 32 through a bearing; a driving device for driving the transmission connecting shaft to rotate around the movable adjustment base plate 32 is installed and connected to the transmission connecting shaft. The driving device includes a large driving wheel 313; the large driving wheel 313 is arranged between the movable adjustment bottom plate 32 and the movable adjustment top plate 33 and away from the side of the direction adjustment movable rotating shaft 31, the large driving wheel 313 is installed and connected to the transmission connecting shaft, the large driving wheel 313 is connected to the small driving wheel through the driving conveyor belt transmission, the small driving wheel is installed and connected to the output shaft of the driving servo motor 314, and the shell of the driving servo motor 314 is fixed to the lifting mounting seat 3 by bolts.

[0022] In the embodiment, the driving servo motor 314 fixed on the lifting mounting seat 3 can be started, and the driving servo motor 314 drives the large driving wheel 313 connected through the small driving wheel to rotate. Since the large driving wheel 313 is installed and connected to the transmission connecting shaft, the large driving wheel 313 rotates, driving the transmission connecting shaft connected to the large driving wheel 313 to rotate around the movable adjustment bottom plate 32 and the movable adjustment top plate 33; and then drives the small driving wheel 312 at the top of the transmission connecting shaft to rotate, so that the small driving wheel 312 drives the transmission connecting wheel 313 through the transmission connecting belt. 11 rotates, and the transmission connecting wheel 311 is installed and connected to the top end of the direction-adjusting movable shaft 31, and then the direction-adjusting movable shaft 31 is driven by the transmission connecting wheel 311 to rotate around the movable adjusting bottom plate 32 fixed on the lifting mounting seat 3 and the other end of the movable adjusting top plate 33, so as to drive the clamping mounting plate 4 connected to the bottom end of the direction-adjusting movable shaft 31 and the limiting top plate 43 installed and connected with the clamping mounting plate 4 to rotate together, and then drive the finger cylinder 5 installed at the other end of the clamping mounting plate 4 to rotate to a suitable position, so as to facilitate the clamping and fixing of the metal pipe.

[0023] Example 4 One end of the ball screw 21 is rotatably connected to the bottom end of the clamping movable frame 2 through a bearing, and the other end of the ball screw 2 is movably passed through the lifting mounting seat 3, and the end is installed and connected to the output end of the electric screw machine 22, and the housing of the electric screw machine 22 is fixed to the top of the clamping movable frame 2 by bolts; the lifting mounting seat 3 is set to be movable and movable with the clamping movable frame 2 through a movable limiting structure. The movable limiting structure includes a limiting guide rail 23; the lifting mounting seat 3 is set to be movable and movable with the clamping movable frame 2 through the limiting guide rail 23.

[0024] At the same time, the rotating mechanism includes a large rotating transmission wheel 11 and a small rotating driving wheel; a rotating shaft is passed through the large rotating transmission wheel 11, one end of the rotating shaft is rotatably arranged with the processing mounting base 1 through a bearing, and the other end of the rotating shaft is connected to the bottom end surface of the clamping movable frame 2, and the clamping movable frame 2 is driven to rotate together by the rotation of the rotating shaft; the large rotating transmission wheel 11 is connected to the small rotating driving wheel through a rotating conveyor belt, and the small rotating driving wheel is installed and connected to the output shaft of the rotating driving servo motor 12, and the housing of the rotating driving servo motor 12 is fixed to the clamping movable frame 2 by bolts.

[0025] In the embodiment, the rotating small driving wheel can be driven to rotate by the rotating driving servo motor 12, so that the rotating small driving wheel drives the rotating large transmission wheel 11 connected through the rotating conveyor belt to rotate, so that the bottom end of the rotating shaft connected to the rotating large transmission wheel 11 is driven to rotate around the processing installation base 1 by the rotating large transmission wheel 11, and the clamping movable frame 2 connected to the top of the rotating shaft is driven to rotate together, so as to realize the adjustment of the rotation direction.

[0026] Moreover, in the embodiment, the electric screw machine 22 can be moved to drive the ball screw 21 to "move" on the clamping movable frame 2, and the ball screw 21 drives the lifting mounting seat 3 to move along the clamping movable frame 2 according to the actual adjustment under the guiding and limiting action of the limiting guide rail 23, and finally drives the finger cylinder 5 to move up and down, so as to facilitate the clamping and fixing of the metal pipe fittings, and to facilitate the position and direction of the metal pipe fittings clamped and limited by the finger cylinder 5, so as to facilitate the purpose of processing and testing. The clamping device can not only replace the original fixed clamping device to clamp and fix the metal pipe fittings that need to be processed and tested, but also adjust the direction and position of processing and testing according to needs; moreover, the clamping device can improve the efficiency of processing and testing, saving time and cost.

Claims

1. A CNC machining clamping device for metal pipe fittings, comprising a machining mounting base, the machining mounting base being used to be mounted and fixed on a machining machine, characterized in that: The top of the processing mounting base is rotatably connected to a clamping movable frame through a rotating mechanism, the clamping movable frame is connected to a ball screw that is vertically arranged and rotatable around the clamping movable frame, the ball screw is connected to a lifting mounting seat that can move up and down along the ball screw, the lifting mounting seat is connected to a movably arranged clamping mounting plate through a direction adjustment mechanism, the clamping mounting plate is connected to a finger cylinder through a movable mechanism, and the finger cylinder is connected to a clamping claw that can be controlled by the finger cylinder and is used to clamp a limited metal pipe fitting; The movable mechanism includes a movable rotating shaft, one end of the movable rotating shaft can rotatably pass through the clamping mounting plate through a bearing and is fixedly connected to the cylinder body of the finger cylinder through an electric rotating disc, which is used to drive the finger cylinder to rotate. The other end of the movable rotating shaft is rotatably connected to the limit top plate through a bearing. The limit top plate is used to be movably installed and connected with the lifting mounting seat, and the limit top plate is fixedly connected to the clamping mounting plate through a connecting pin.

2. A metal material pipe CNC machining clamping device according to claim 1, characterized in that: A movable transmission wheel is installed and connected on the movable rotating shaft, and the movable transmission wheel is arranged between the limiting top plate and the clamping mounting plate. The movable transmission wheel is connected to the clamping mounting plate through a movable driving device, and the movable driving device drives the movable rotating shaft to rotate through the movable transmission wheel.

3. A metal material pipe CNC machining clamping device according to claim 2, characterized in that: The movable driving device includes a movable driving motor, which is installed and connected on a clamping mounting plate. A movable driving wheel is installed and connected on the output shaft of the movable driving motor. The movable driving wheel is connected to the movable transmission wheel installed and connected on the movable rotating shaft through a movable conveyor belt.

4. A metal material pipe CNC machining clamping device according to claim 3, characterized in that: The direction adjustment mechanism includes a direction adjustment movable shaft; One end of the direction-adjusting movable rotating shaft rotatably passes through the movable adjusting bottom plate through a bearing, and the end head passes through the limiting top plate and is connected and fixed to the clamping mounting plate, and the other end of the direction-adjusting movable rotating shaft rotatably passes through the movable adjusting top plate through a bearing and is installed and connected with a transmission device for driving the direction-adjusting movable rotating shaft to rotate; The movable adjustment bottom plate and the movable adjustment top plate are connected and fixed via a connecting pin shaft, and the movable adjustment bottom plate and the movable adjustment top plate are connected and fixed via a mounting plate and a lifting mounting seat.

5. The CNC machining clamping device for metal pipes according to claim 4, characterized in that: The transmission device comprises a small transmission driving wheel and a transmission connecting wheel; The transmission connecting wheel is installed and connected to the end of the direction adjustment movable shaft away from the movable adjustment bottom plate, and the transmission connecting wheel is transmission-connected to the transmission small driving wheel arranged on the end surface of the movable adjustment top plate away from the movable adjustment bottom plate through the transmission connecting belt; The transmission small driving wheel is installed and connected to the transmission connecting shaft, and one end of the transmission connecting shaft away from the transmission small driving wheel can rotatably pass through the movable adjustment top plate through a bearing and is also rotatably connected to the movable adjustment bottom plate through a bearing; The transmission connection shaft is connected with a driving device for driving the transmission connection shaft to rotate around the movable adjustment base plate.

6. A metal material pipe CNC machining clamping device according to claim 5, characterized in that: The drive device includes a large drive wheel; The large driving wheel is arranged between the movable adjustment bottom plate and the movable adjustment top plate and on a side away from the direction adjustment movable rotating shaft. The large driving wheel is installed and connected to the transmission connecting shaft. The large driving wheel is connected to the small driving wheel through a driving conveyor belt transmission. The small driving wheel is installed and connected to the output shaft of the driving servo motor. The housing of the driving servo motor is fixed to the lifting mounting seat by bolts.

7. A metal material pipe CNC machining clamping device according to claim 6, characterized in that: One end of the ball screw is rotatably connected to the bottom end of the clamping movable frame through a bearing, the other end of the ball screw movably passes through the lifting mounting seat, and the end is installed and connected to the output end of the electric screw machine, and the housing of the electric screw machine is fixed to the top end of the clamping movable frame by bolts; The lifting installation seat can be lifted and lowered by means of a movable limiting structure and a clamping movable frame.

8. The metal material pipe CNC machining clamping device according to claim 7, characterized in that: The movable limiting structure includes a limiting guide rail; The lifting mounting seat is arranged to be lifted and movably disposed through the limiting guide rail and the clamping movable frame.

9. A metal material pipe CNC machining clamping device according to claim 8, characterized in that: The rotating mechanism includes a rotating large transmission wheel and a rotating small driving wheel; The rotating large transmission wheel is provided with a rotating shaft, one end of which is rotatably arranged with the processing installation base through a bearing, and the other end of which is connected with the bottom end surface of the clamping movable frame, and the clamping movable frame is driven to rotate together by the rotation of the rotating shaft; The large rotating transmission wheel is connected to the small rotating driving wheel through a rotating conveyor belt. The small rotating driving wheel is installed on the output shaft of the rotating driving servo motor. The housing of the rotating driving servo motor is fixed on the clamping movable frame by bolts.

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