Double-end clamp structure

Abstract

The invention provides a double-end clamp structure, which relates to the field of laser cutting and comprises a clamp device, a feeding thread driving rod and a sliding frame, the feeding threaded driving rod is connected into the threaded through hole of the sliding frame in a meshed mode. The clamp device comprises a rotating shell, a baffle, a sliding cylinder, a motor frame, a driving gear, a clamping motor, a rotating cylinder, a spring, a guide column and a clamping block. A motor frame is welded to the rear side face of the rotating shell, a clamping motor is connected to the rear side face of the motor frame through bolts, a driving gear is installed on a motor shaft of the clamping motor, and the rotating shell is welded to a spring; the spring is welded with the clamping block; the outer side face of the rotating cylinder is in engaged connection with a sliding cylinder. Through the arrangement of the clamp device, the feeding threaded driving rod and the sliding frame, stable clamping and fixing of the two ends of the metal pipe fitting in the laser cutting process are achieved, the cutting efficiency of the metal pipe fitting is improved, and the problems that in traditional laser cutting, cutting of the metal pipe fitting is not stable, and the cutting machining efficiency is low due to manual drawing of the pipe fitting feeding are solved.

Description

Technical Field

[0001] The invention belongs to the field of laser cutting, and more specifically, particularly relates to a double-end clamp structure. Background Art

[0002] Laser cutting is a process in which optical components are used to guide a high-power, high-density laser beam to focus on the surface of the workpiece to be cut, so that the irradiated workpiece material can be quickly melted and ablated, thereby achieving the cutting and separation of the workpiece. At present, when laser technology is used to cut metal pipe workpieces, it is necessary to manually insert and clamp the pipe workpiece on a rotatable fixture disk, and the rotation of the fixture disk drives the pipe workpiece to perform circular path cutting. After the cutting is completed, the cut metal pipe product falls into the blanking box by gravity, and the fixture disk loosens the remaining pipe workpiece, and then the cutting worker pulls the remaining pipe workpiece to the cutting position, and the fixture disk clamps the remaining pipe again to prepare for the second cutting. It can be seen that during the cutting process, the metal pipe workpiece only uses one set of fixture disks to clamp and fix the metal pipe, and the end of the metal pipe extending out of the fixture disk is in a suspended state. When the laser is cutting the metal pipe around, the metal at the cutting position is in a molten state. The finished pipe fittings being cut are easily deformed due to the influence of gravity, resulting in uneven cuts of the pipe fittings. In addition, the pulling and feeding process of the metal pipe workpiece needs to be completed manually. Due to the large weight of the metal pipe, the manual pulling process of the metal pipe is time-consuming and labor-intensive, which reduces the processing efficiency of the transposition cutting of the pipe workpiece. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a double-end clamp structure to solve the problems of unstable cutting of metal pipes in traditional laser cutting and low cutting efficiency caused by manual pulling of pipes for feeding.

[0004] The present invention provides a double-end clamp structure, comprising a base plate; a feed drive motor is connected to the rear side of the base plate by bolts, a feed threaded drive rod is installed on the motor shaft of the feed drive motor, a discharge motor is connected to the front side of the base plate by bolts, a discharge threaded drive rod is installed on the motor shaft of the discharge motor, a waste chip tray is placed on the upper side of the base plate, the upper side of the base plate is connected to a base by bolts, a flip seat is hinged on the upper side of the base, the upper side of the flip seat is connected to a fixed frame by bolts, and the front side of the fixed frame is welded to a support frame; it also includes a mobile frame, a clamp device, a metal pipe The supporting device and the controller; the number of the clamping devices is two groups, and the clamping device includes a rotating shell, a baffle, a slide cylinder, a motor frame, a driving gear, a clamping motor, a rotating drum, a spring, a guide column and a clamping block; the rear side of the rotating shell is welded and connected to the motor frame, the rear side of the motor frame is bolted to the clamping motor, the motor shaft of the clamping motor is installed with a driving gear, the front side of the rotating shell is bolted to the baffle, the rotating shell is welded to the guide column, and the rotating shell is welded to the spring; the spring is welded to the clamping block; the inner side of the rotating drum is interspersed with metal pipes, and the outer side of the rotating drum is meshed and connected with Slide cylinder; the number of the metal tube support device is three groups, and the metal tube support device includes a support plate, a roller, a bracket, a knob, a threaded rod and a slide rod; the upper side surface of the support plate is provided with a circular deep hole, and the inner side wall of the deep hole is provided with two groups of groove structures distributed symmetrically on the left and right, and the lower side surface of the support plate is welded and connected with a support frame; the top end of the slide rod is welded and connected with a bracket, and the bracket is a groove structure, and the inner side of the bracket groove is rotatably connected with a roller; the bottom end of the threaded rod is welded and connected with a knob; the rear side surface of the fixed frame is provided with a through-hole structure that penetrates front and back, and a rotating shell is rotatably connected in the through-hole of the fixed frame; The front side of the fixed frame is hinged with a connecting rod, and the bottom end of the connecting rod is hinged with a slider; the front side of the movable frame is provided with a through hole that passes through the front and back, and a rotating shell of another set of clamping devices is rotatably connected in the through hole of the movable frame, and the lower side of the movable frame is connected with a slide frame by bolts, and the front side and rear side of the movable frame are welded and connected with a supporting frame, and the rear side of the movable frame is provided with a circular hole groove, and a through hole is provided at the bottom of the groove, and a rotating motor is connected to the bottom of the groove of the movable frame by bolts; the motor shaft of the rotating motor is inserted into the through hole at the bottom of the circular hole groove of the movable frame, and a driving gear is installed on the motor shaft of the rotating motor.

[0005] In at least some embodiments, through holes are provided at the center of the front and rear sides of the rotating shell, two sets of grooves are provided on the inner side of the rotating shell, an external tooth structure is provided on the outer side of the rotating shell, and the driving gear is meshed and connected to the external tooth structure of the rotating shell.

[0006] In at least some embodiments, the slide cylinder is a cylindrical structure that penetrates from front to back, the inner side of the slide cylinder is provided with a threaded structure, and the outer side of the slide cylinder is provided with two groups of convex strip structures that are symmetrically distributed up and down, and the convex strip structures of the slide cylinder are embedded in two groups of grooves on the inner side of the rotating shell.

[0007] In at least some embodiments, the rotating drum is a cylindrical structure that penetrates from front to back, and the outer side of the rotating drum is provided with an external tooth structure and a thread structure from front to back. The external tooth structure of the rotating drum is meshed and connected to the outer side of the driving gear, and the thread structure of the rotating drum is meshed and connected to the thread structure on the inner side of the sliding cylinder.

[0008] In at least some embodiments, the number of the clamping blocks is four groups, and the clamping blocks are distributed in a circular array around the central axis of the slide cylinder. The clamping blocks are provided with protrusions, and the protrusions are provided with holes. The guide columns are embedded in the protrusion holes of the clamping blocks. The guide columns and the clamping blocks are slidably connected through the protrusion holes. The rear side surface of each group of clamping blocks is provided with a slope structure, and the front end of the inner side surface of the cylinder of the slide cylinder is fitted on the slope structure of the clamping blocks.

[0009] In at least some embodiments, a protrusion is provided on the lower side of the slide, and a threaded through hole structure is provided on the front side of the protrusion, and the outer side surface of the feed threaded drive rod is threadedly engaged in the threaded through hole of the protrusion of the slide.

[0010] In at least some embodiments, the outer side of the sliding rod is provided with two groups of convex strips, the convex strips of the sliding rod are embedded in the deep hole grooves of the support plate, the lower side of the sliding rod is provided with a threaded through hole structure that passes through the upper and lower parts at the center position, and the outer side surface of the threaded rod is threadedly engaged in the threaded through hole of the sliding rod.

[0011] In at least some embodiments, a threaded through hole extending from front to back is provided at the center of the front side surface of the slider, and the outer side surface of the unloading threaded driving rod is threadedly engaged in the threaded through hole of the slider.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, a threaded engagement transmission structure formed by a threaded driving rod driven by a unloading motor at the threaded through hole of a slider allows the threaded driving rod to drive the slider to move forward and backward, so that a sliding connecting rod motion mechanism formed by the hinge of the slider, the connecting rod, the fixed frame and the flip seat operates, so that when the clamp device connected by rotation in the through hole of the fixed frame releases the metal pipe fitting, the slider pulls the fixed frame to flip forward through the connecting rod, so that the metal pipe fitting slides out of the fixed frame by gravity, thereby realizing the automatic unloading of the metal pipe fitting.

[0013] 2. In the present invention, a threaded engagement transmission structure composed of a feeding threaded driving rod and a slide frame is utilized, so that the clamp device rotatably connected to the movable frame carries the metal pipe fittings remaining after cutting and moves and inserts into the rotatably connected clamp device in the through hole of the fixed frame, thereby realizing the automatic feeding of the metal pipe fittings, abandoning the traditional manual pulling and feeding method, saving manpower, and improving the continuous cutting efficiency of the metal pipe fittings.

[0014] 3. In the present invention, a clamping device is provided, and the threaded engagement structure between the slide cylinder and the rotating cylinder is driven by the clamping motors in the two sets of clamping devices, so that the slide cylinder pushes the inclined surface of the clamping block to clamp the two ends of the metal pipe fitting, thereby realizing stable clamping and fixing of the metal pipe fitting during laser cutting, and avoiding the deformation of the cutting surface caused by one end of the metal pipe fitting being suspended in the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a right-side structural schematic diagram of the present invention.

[0017] Figure 3 It is a front view structural schematic diagram of the present invention.

[0018] Figure 4 It is a schematic diagram of the top structure of the present invention.

[0019] Figure 5 It is a schematic structural diagram of the clamp device of the present invention.

[0020] Figure 6 It is a schematic diagram of the rear side structure of the clamp device of the present invention.

[0021] Figure 7 It is a schematic diagram of the cutaway structure of the clamp device of the present invention.

[0022] Figure 8 It is a structural schematic diagram of the metal pipe supporting device of the present invention.

[0023] Fig. 9 It is a front view structural schematic diagram of the metal pipe supporting device of the present invention.

[0024] Fig.10 It is a schematic diagram of the cutaway structure of the metal pipe supporting device of the present invention.

[0025] Fig.11 It is a schematic diagram of the cutaway structure of the present invention.

[0026] Reference numerals: 1. Bottom plate; 2. Unloading motor; 3. Discharge thread drive rod; 4. Fixed frame; 5. Mobile rack; 6. Waste tray; 7. Material feeding thread drive rod; 8. Slide; 9. Metal pipe fittings; 10. Connecting rod; 11. Slider; 12. Flip seat; 13. Base; 14. Support frame; 15. Rotating motor; 16. Driving gear; 17. Clamping device; 1701. Rotating shell; 1702. Baffle; 1703. Slide; 1704. Motor frame; 1705. Driving gear; 1706. Clamping motor; 1707. Rotating drum; 1708. Spring; 1709. Guide column; 1710. Clamping block; 18. Feeding drive motor; 19. Metal pipe supporting device; 1901. Support plate; 1902. Roller; 1903. Bracket; 1904. Knob; 1905. Threaded rod; 1906. Sliding rod. DETAILED DESCRIPTION

[0027] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] like Figure 1-Figure 11As shown, the present invention provides a double-end clamp structure, including a base plate 1; the rear side of the base plate 1 is connected to a feed drive motor 18 by bolts, and a feed threaded drive rod 7 is installed on the motor shaft of the feed drive motor 18; the front side of the base plate 1 is connected to a discharge motor 2 by bolts, and a discharge threaded drive rod 3 is installed on the motor shaft of the discharge motor 2; a waste chip tray 6 is placed on the upper side of the base plate 1; the upper side of the base plate 1 is connected to a base 13 by bolts, and a flip seat 12 is hinged on the upper side of the base 13; the upper side of the flip seat 12 is connected to a fixed frame 4 by bolts, and the front side of the fixed frame 4 is welded to a support frame 14; it also includes a moving frame 5, a clamp device 17 and a metal pipe support device 19; the number of the clamp devices 17 is two groups, and the clamp devices 17 It includes a rotating shell 1701, a baffle 1702, a slide 1703, a motor frame 1704, a driving gear 1705, a clamping motor 1706, a rotating drum 1707, a spring 1708, a guide column 1709 and a clamping block 1710; the rear side of the rotating shell 1701 is welded to the motor frame 1704, the rear side of the motor frame 1704 is bolted to the clamping motor 1706, the motor shaft of the clamping motor 1706 is installed with a driving gear 1705, the front side of the rotating shell 1701 is bolted to the baffle 1702, the rotating shell 1701 is welded to the guide column 1709, the rotating shell 1701 is welded to the spring 1708; the spring 1708 is welded to the clamping block 1710; a metal pipe is inserted into the inner side of the rotating drum 1707 Part 9, the outer side of the rotating cylinder 1707 is meshed and connected with the sliding cylinder 1703; the number of metal tube support devices 19 is three groups, and the metal tube support devices 19 include a support plate 1901, a roller 1902, a bracket 1903, a knob 1904, a threaded rod 1905 and a sliding rod 1906; the upper side of the support plate 1901 is provided with a circular deep hole, and the inner side wall of the deep hole is provided with two groups of groove structures distributed symmetrically on the left and right, and the lower side of the support plate 1901 is welded and connected with the support frame 14; the top of the sliding rod 1906 is welded and connected with the bracket 1903, and the bracket 1903 is a groove structure, and the inner side of the groove of the bracket 1903 is rotatably connected with the roller 1902; the bottom end of the threaded rod 1905 is welded and connected with the knob 1904; the rear side of the fixed frame 4 is provided with a front and rear through The through-hole structure is connected, and a rotating shell 1701 is rotatably connected in the through-hole of the fixed frame 4; a connecting rod 10 is hinged on the front side of the fixed frame 4, and a slider 11 is hinged on the bottom end of the connecting rod 10; the front side of the movable frame 5 is provided with a through-hole that passes through the front and back, and a rotating shell 1701 of another group of clamp devices 17 is rotatably connected in the through-hole of the movable frame 5, the lower side of the movable frame 5 is connected with the slide 8 by bolts, the front side and the rear side of the movable frame 5 are welded and connected with the support frame 14, the rear side of the movable frame 5 is provided with a circular hole groove, and a through hole is provided at the bottom of the groove, and a rotating motor 15 is connected to the bottom of the groove of the movable frame 5 by bolts; the motor shaft of the rotating motor 15 is inserted in the through-hole at the bottom of the circular hole groove of the movable frame 5, and a driving gear 16 is installed on the motor shaft of the rotating motor 15.

[0029] In the disclosed embodiment, through holes are provided at the center positions of the front side and the rear side of the rotating shell 1701, two sets of grooves are provided on the inner side of the rotating shell 1701, and an external tooth structure is provided on the outer side of the rotating shell 1701. The driving gear 16 is meshedly connected to the external tooth structure of the rotating shell 1701, so that the rotating motor 15 drives the rotating shell 1701 to rotate through the gear meshing transmission structure formed by the driving gear 16 and the external teeth of the rotating shell 1701, and the clamp device 17 drives the metal pipe 9 to perform circumferential rotation cutting.

[0030] In the disclosed embodiment, the slide 1703 is a cylindrical structure that penetrates from front to back, the inner side surface of the slide 1703 is provided with a threaded structure, and the outer side surface of the slide 1703 is provided with two groups of convex strip structures that are symmetrically distributed up and down. The convex strip structures of the slide 1703 are embedded in two groups of grooves on the inner side surface of the rotating shell 1701, so that the slide 1703 can slide forward and backward along the grooves of the rotating shell 1701.

[0031] In the disclosed embodiment, the rotating drum 1707 is a cylindrical structure that penetrates from front to back. The outer side surface of the rotating drum 1707 is provided with an external tooth structure and a thread structure in sequence from front to back. The external tooth structure of the rotating drum 1707 is meshed and connected to the outer side surface of the driving gear 1705, and the thread structure of the rotating drum 1707 is meshed and connected to the thread structure on the inner side surface of the sliding drum 1703. The driving gear 1705 drives the rotating drum 1707 to rotate through the external tooth structure of the rotating drum 1707, and the rotating drum 1707 drives the sliding drum 1703 to slide back and forth through the thread structure.

[0032] In the embodiment of the present disclosure, there are four groups of clamping blocks 1710, which are distributed in a circular array around the central axis of the slide 1703. A boss is provided on the clamping block 1710, and a hole is provided on the boss. The guide column 1709 is embedded in the boss hole of the clamping block 1710, and the guide column 1709 is slidably connected to the clamping block 1710 through the boss hole. The rear side surface of each group of clamping blocks 1710 is provided with a slope structure, and the front end of the inner side surface of the cylinder of the slide 1703 is fitted on the slope structure of the clamping block 1710, so that the slide 1703 can synchronously drive the four groups of clamping blocks 1710 to slide inward or outward along the four groups of guide columns 1709 during the process of moving forward and backward, thereby completing the stable clamping or loosening of the metal pipe 9 by the clamping blocks 1710.

[0033] In the disclosed embodiment, a protrusion is provided on the lower side of the slide 8, and a threaded through hole structure is provided on the front side of the protrusion which passes through from front to back. The outer side of the feed threaded driving rod 7 is threadedly engaged with the threaded through hole of the protrusion of the slide 8. The feed threaded driving rod 7 drives the movable frame 5 connected to the upper side bolts of the slide 8 to move forward and backward, so that the clamp device 17 connected to the movable frame 5 rotates and drives the metal pipe 9 remaining after cutting to automatically feed the material.

[0034] In the embodiment of the present disclosure, two groups of convex strips are provided on the outer side surface of the slide rod 1906, and the convex strips of the slide rod 1906 are embedded in the deep hole groove of the support plate 1901. The lower side surface of the slide rod 1906 is provided with a threaded through hole structure that passes through up and down at the center position. The outer side surface of the threaded rod 1905 is threadedly engaged and connected in the threaded through hole of the slide rod 1906, so that the threaded rod 1905 drives the slide rod 1906 to move vertically up and down along the deep hole groove of the support plate 1901, and the support height of the roller 1902 for the metal pipe fitting 9 is changed according to the diameter of the metal pipe fitting 9, so that the central axis of the metal pipe fitting 9 with different diameters is flush with the central axis of the rotating drum 1707, so as to avoid the central axis of the metal pipe fitting 9 being higher than the central axis of the rotating drum 1707, which causes the four groups of clamps 1710 to be unable to stably clamp the metal pipe fitting 9 in the center.

[0035] In the disclosed embodiment, a threaded through hole extending from front to back is provided at the center position of the front side surface of the slider 11, and the outer side surface of the unloading threaded driving rod 3 is threadedly engaged with the threaded through hole of the slider 11. The unloading threaded driving rod 3 drives the slider 11 to move forward and backward, so that the slider 11 drives the fixing frame 4 to flip forward and backward through the hinged connecting rod 10, and the metal pipe 9 that has been cut is flipped and unloaded in the clamp device 17.

[0036] The specific usage and function of this embodiment are as follows: When the present invention performs laser cutting of metal pipes, the metal pipe fitting 9 is first inserted into the rotating drum 1707 of the two sets of clamp devices 17, and then the knob 1904 is manually turned according to the diameter of the metal pipe fitting 9, and the knob 1904 drives the threaded rod 1905 to rotate, and the threaded rod 1905 drives the sliding rod 1906 meshed and connected to the outer side surface through the thread to move vertically up and down along the deep hole groove of the support plate 1901, so that the central axis of the metal pipe fitting 9 and the central axis of the rotating drum 1707 are aligned and coincide with each other, and then the two clamping motors 1706 are synchronously started, and the clamping motor 1706 drives the driving gear 1705 to rotate. Since the driving gear 1705 is meshed and connected to the outer tooth structure of the rotating drum 1707, the driving gear 1705 drives the rotating drum 170 7 rotates, because the thread structure on the outer side of the rotating cylinder 1707 is meshed and connected with the thread structure on the inner side of the slide 1703, the rotating cylinder 1707 drives the slide 1703 to move forward along the groove on the inner side of the rotating shell 1701 during the rotation process, and the front end edge position of the inner side of the slide 1703 pushes the inclined surface structure of the four groups of clamping blocks 1710 at the same time, and the four groups of clamping blocks 1710 move inward synchronously along the guide column 1709 until the four groups of clamping blocks 1710 are attached to the outer side of the metal pipe 9, and the clamping blocks 1710 clamp the metal pipe 9, and then the laser cutting head of the external laser cutting machine is aimed at the cutting part of the metal pipe 9 for irradiation and cutting, at this time, the rotating motor 15 drives the driving gear 16 to rotate, and the driving gear 16 passes through the outer side of the rotating shell 1701 The outer tooth structure on the surface drives the rotating shell 1701 to rotate, so that the clamp device 17 drives the clamped metal pipe 9 to rotate and cut. After the cutting is completed, the unloading motor 2 drives the unloading threaded driving rod 3 to rotate. Since the outer side thread of the unloading threaded driving rod 3 is meshed with the slider 11, the unloading threaded driving rod 3 drives the slider 11 to slide forward. The slider 11 drives the fixed frame 4 to flip forward through the connecting rod 10 hinged on the upper side. The clamping motor 1706 in the clamp device 17 connected to the rotation in the through hole of the fixed frame 4 drives the driving gear 1705 to reverse, and the driving gear 1705 drives the rotating drum 1707 to rotate. The rotating drum 1707 drives the slide 1703 to slide backward. The four groups of clamping blocks 1710 move outward along the guide column 1709 under the traction of the spring 1708. The four groups of clamping blocks 1710 loosen the metal pipe fittings 9. Since the fixing frame 4 is in a forward tilted state, the cut finished metal pipe fittings 9 slide out of the clamp device 17 by gravity, and then the unloading motor 2 drives the unloading threaded driving rod 3 to rotate in the opposite direction, and the slider 11 pushes the connecting rod 10 to make the fixing frame 4 return to an upright state, and then the feeding driving motor 18 drives the feeding threaded driving rod 7 to rotate. Since the outer side surface of the feeding threaded driving rod 7 is threadedly engaged with the threaded through hole of the slide 8, the feeding threaded driving rod 7 drives the slide 8 to move in the direction of the fixing frame 4, so that the remaining metal pipe fittings 9 are inserted into the clamp device 17 where the fixing frame 4 is rotatably connected, and the clamp device 17 connected to the fixing frame 4 is rotatably connected to clamp the remaining metal pipe fittings 9.The clamp device 17 connected to the mobile frame 5 rotates to loosen the remaining metal pipe 9. At this time, the roller 1902 of the metal pipe support device 19 supports the metal pipe 9, and the feed drive motor 18 drives the feed thread drive rod 7 to rotate in the opposite direction. The slide 8 carries the mobile frame 5 to retreat backward, and the roller 1902 slides on the outer side of the metal pipe 9. Finally, the clamp device 17 connected to the mobile frame 5 rotates to clamp the remaining metal pipe 9, and the second cutting of the metal pipe 9 is started, completing the automatic feed clamping of the metal pipe 9.

[0037] The installation, connection or setting methods of all the above components are common mechanical methods, such as welding, threaded connection, screw connection, etc., and the specific structures, models and coefficient indicators of all its components are its own technology, as long as it can achieve its beneficial effects, it can be implemented. The above-mentioned rotating motor 15, clamping motor 1706, and feed drive motor 18 are all common components on the market. When you buy them back and use them, you only need to connect them according to the instruction manual purchased together, so I will not repeat them here.

[0038] The technical solutions of the present invention are not limited to the scope of the embodiments of the present invention, and the technical contents not described in detail in the present invention are all well-known technologies.

Claims

1. A double-end clamp structure, comprising a base plate (1); the rear side of the base plate (1) is connected to a feed drive motor (18) by bolts, a feed thread drive rod (7) is installed on the motor shaft of the feed drive motor (18), the front side of the base plate (1) is connected to a discharge motor (2) by bolts, a discharge thread drive rod (3) is installed on the motor shaft of the discharge motor (2), a waste chip tray (6) is placed on the upper side of the base plate (1), the upper side of the base plate (1) is connected to a base (13) by bolts, the upper side of the base (13) is hinged with a flip seat (12), the upper side of the flip seat (12) is connected to a fixing frame (4) by bolts, and the front side of the fixing frame (4) is welded to a support frame (14); characterized in that: The invention also comprises a moving frame (5), a clamping device (17) and a metal pipe supporting device (19); the number of the clamping devices (17) is two groups, and the clamping devices (17) comprise a rotating shell (1701), a baffle (1702), a slide cylinder (1703), a motor frame (1704), a driving gear (1705), a clamping motor (1706), a rotating cylinder (1707), a spring (1708), a guide column (1709) and a clamping block (1710); the rear side surface of the rotating shell (1701) is welded to the motor frame (1704), the rear side surface of the motor frame (1704) is bolted to the clamping motor (1706), and the motor shaft of the clamping motor (1706) is equipped with a driving gear (1710). 705), the front side of the rotating shell (1701) is connected to a baffle (1702) by bolts, the rotating shell (1701) is welded to the guide column (1709), and the rotating shell (1701) is welded to the spring (1708); the spring (1708) is welded to the clamping block (1710); a metal pipe (9) is inserted into the inner side of the rotating cylinder (1707), and a sliding cylinder (1703) is meshedly connected to the outer side of the rotating cylinder (1707); the number of the metal pipe support device (19) is three groups, and the metal pipe support device (19) includes a support plate (1901), a roller (1902), a bracket (1903), a knob (1904), a threaded rod (1905) and a sliding rod (1906) The upper side surface of the support plate (1901) is provided with a circular deep hole, and the inner side wall of the deep hole is provided with two groups of groove structures that are symmetrically distributed on the left and right sides. The lower side surface of the support plate (1901) is welded and connected to a support frame (14); the top end of the sliding rod (1906) is welded and connected to a bracket (1903), the bracket (1903 is a groove structure, and the inner side of the groove of the bracket (1903) is rotatably connected to a roller (1902); the bottom end of the threaded rod (1905) is welded and connected to a knob (1904); the rear side surface of the fixing frame (4) is provided with a through hole structure that passes through the front and back, and the through hole of the fixing frame (4) is rotatably connected to a rotating shell (1701); the front side surface of the fixing frame (4) is hinged with a connecting rod (10), and the connecting rod (10) is hinged to the connecting rod (10). A slider (11) is hingedly connected to the bottom end of the rod (10); a through hole is provided on the front side of the moving frame (5) and is connected to the through hole of the moving frame (5) in rotation; a rotating shell (1701) of another set of clamping devices (17) is rotatably connected; a sliding frame (8) is connected to the lower side of the moving frame (5) by bolts; a supporting frame (14) is welded to the front side and the rear side of the moving frame (5); a circular hole groove is provided on the rear side of the moving frame (5); a through hole is provided at the bottom of the groove; a rotating motor (15) is connected to the bottom of the groove of the moving frame (5) by bolts; a motor shaft of the rotating motor (15) is inserted into the through hole at the bottom of the circular hole groove of the moving frame (5); a driving gear (16) is installed on the motor shaft of the rotating motor (15).

2. A double-ended clamp structure as claimed in claim 1, characterized in that: The front side surface and the rear side surface center positions of the rotating shell (1701) are both provided with through holes, the inner side surface of the rotating shell (1701) is provided with two groups of grooves, the outer side surface of the rotating shell (1701) is provided with an external tooth structure, and the driving gear (16) is meshedly connected to the external tooth structure of the rotating shell (1701).

3. A double-ended clamp structure as claimed in claim 1, characterized in that: The slide cylinder (1703) is a cylindrical structure that penetrates from front to back. The inner side surface of the slide cylinder (1703) is provided with a thread structure. The outer side surface of the slide cylinder (1703) is provided with two groups of convex strip structures that are symmetrically distributed up and down. The convex strip structures of the slide cylinder (1703) are embedded in two groups of grooves on the inner side surface of the rotating shell (1701).

4. A double-ended clamp structure as claimed in claim 1, characterized in that: The rotating drum (1707) is a cylindrical structure that penetrates from front to back. The outer side surface of the rotating drum (1707) is provided with an external tooth structure and a thread structure in sequence from front to back. The external tooth structure of the rotating drum (1707) is meshedly connected to the outer side surface of the driving gear (1705), and the thread structure of the rotating drum (1707) is meshedly connected to the thread structure on the inner side surface of the sliding drum (1703).

5. A double-ended clamp structure as claimed in claim 1, characterized in that: The number of the clamping blocks (1710) is four groups, and the clamping blocks (1710) are distributed in a circular array around the central axis of the slide cylinder (1703). The clamping blocks (1710) are provided with a boss, and the boss is provided with a hole groove. The guide column (1709) is embedded in the boss hole groove of the clamping block (1710). The guide column (1709) and the clamping block (1710) are slidably connected via the boss hole groove. The rear side surface of each group of clamping blocks (1710) is provided with an inclined surface structure, and the front end of the inner side surface of the cylinder of the slide cylinder (1703) is fitted on the inclined surface structure of the clamping block (1710).

6. A double-ended clamp structure as claimed in claim 1, characterized in that: The lower side of the slide (8) is provided with a protrusion, and the front side of the protrusion is provided with a threaded through hole structure that passes through the front and rear. The outer side of the material feeding threaded driving rod (7) is threadedly engaged in the threaded through hole of the protrusion of the slide (8).

7. A double-ended clamp structure as claimed in claim 1, characterized in that: The outer side surface of the slide rod (1906) is provided with two groups of convex strips, and the convex strips of the slide rod (1906) are embedded in the deep hole groove of the support plate (1901). The lower side surface of the slide rod (1906) is provided with a threaded through hole structure that passes through from top to bottom at the center position, and the outer side surface of the threaded rod (1905) is threadedly engaged in the threaded through hole of the slide rod (1906).

8. A double-ended clamp structure as claimed in claim 1, characterized in that: A threaded through hole extending from front to back is provided at the center of the front side of the slider (11), and the outer side of the unloading threaded driving rod (3) is threadedly engaged in the threaded through hole of the slider (11).

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