A stainless steel pipe internal and external thread processing equipment

Abstract

The invention discloses an internal and external thread processing device for a stainless steel pipe, relates to the technical field of steel pipe processing, and comprises an adjustable rolling processing mechanism, a steel pipe control mechanism, and an adjustable turning processing mechanism; the adjustable rolling processing mechanism comprises: a cross bracket, a slider I, a hydraulic cylinder, a transmission shaft I, a rolling wheel, an extension bracket I, a stepping motor I, a belt, a connecting rod, and a linkage matching component; there are four sliders I, which are slidably mounted in four slide grooves on the cross bracket, a cylinder body of the hydraulic cylinder is fastened to the cross bracket by bolts, a piston rod of the hydraulic cylinder is fixedly connected to the slider I, and the transmission shaft I is rotatably mounted in a circular hole on the slider I; when the invention is in use, the internal and external threads of the steel pipe are processed by a combination of rolling and turning, the processing method can be selected according to specific needs during processing, and the internal and external threads can be processed simultaneously, and the internal threads or external threads can be selectively processed.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe processing, in particular to internal and external thread processing equipment for stainless steel pipes. Background Art

[0002] When steel pipes are produced and used, they need to be butt-jointed in some cases to achieve more convenient use. The existing thread processing equipment can only process fixed thread styles, which cannot be changed at any time, and cannot process both ends of the steel pipe at the same time. When the other end of the steel pipe needs to be processed, the steel pipe needs to be manually re-fixed, which is very cumbersome.

[0003] The present invention is designed to address the defects of the prior art. When in use, the present invention adopts a combination of rolling and turning to process internal and external threads on a steel pipe. The processing method can be selected according to specific needs during processing, and the internal and external threads can be processed simultaneously, and the internal threads or external threads can be processed selectively. When in use, the present device can fix the steel pipe and rotate the steel pipe at the same time. Different from the traditional clamping mechanism, the present device clamps the middle of the steel pipe to expose both ends of the steel pipe, which can meet the needs of simultaneous processing on both sides, and can also rotate the steel pipe 180 degrees to better meet the needs of using the same processing method on both sides. Summary of the invention

[0004] In view of the above technical problems, the present invention provides an internal and external thread processing equipment for stainless steel pipes, which can effectively solve the problems in the above background technology.

[0005] A kind of internal and external thread processing equipment for stainless steel pipes, including an adjustable rolling processing mechanism, a steel pipe control mechanism, and an adjustable turning processing mechanism; the adjustable rolling processing mechanism includes: a cross bracket, a slider I, a hydraulic cylinder, a transmission shaft I, a rolling wheel, an extension bracket I, a stepper motor I, a belt, a connecting rod and a linkage matching component; there are four sliders I, which are slidably installed in four slide grooves on the cross bracket, the cylinder body of the hydraulic cylinder is fastened to the cross bracket by bolts, the piston rod of the hydraulic cylinder is fixedly connected to the slider I, the transmission shaft I is rotatably installed in the round hole on the slider I, and the rolling wheel is fixedly installed on the transmission shaft I; the extension bracket I and the slider I are fixedly welded together, the stepper motor I is fastened to the extension bracket I by bolts, the motor shaft of the stepper motor I is fixedly connected to one end of the transmission shaft I, and a pulley is also provided on the transmission shaft I, and the pulleys on the four transmission shafts I are connected by belts, and there are four connecting rods, and the two ends of each connecting rod are rotatably installed on the adjacent transmission shaft I.

[0006] Preferably, the linkage matching component includes: a central shaft, a driven gear I, a right-angle bracket, an extension bracket II, a stepper motor II, a cylinder I, and a connecting ring; the middle of the central shaft is movably installed in the circular hole in the middle of the cross bracket, and one end of the central shaft is provided with two sections of thread, the pitch of the two sections of thread is wide and narrow, and the outermost section is smooth; the driven gear I is slidably installed on the convex groove on the central shaft, the right-angle bracket is fixedly installed on the cross bracket, and a buckle is provided on the right-angle bracket, which is slidably connected to the circular ring groove on the driven gear I, the extension bracket II is fixedly welded on the right-angle bracket, and the extension bracket II is fixedly installed with a cylinder I, the piston rod of the cylinder I is fixedly connected to the connecting ring, and the connecting ring is rotatably installed on the central shaft; the stepper motor II is fixedly installed on the right-angle bracket, and the motor gear of the stepper motor II is meshed with the driven gear I.

[0007] Preferably, the steel pipe control mechanism includes: a base frame, a cylinder II, an upper semicircular ring, an upper semi-gear ring, a lower semicircular ring, a lower semi-gear ring transmission assembly and a rotating assembly; the cylinder body of the cylinder II is rotatably mounted on a hinge seat on the base frame, the piston rod of the cylinder II is rotatably connected to the hinge seat on the upper semicircular ring, the upper semicircular ring is rotatably mounted on the hinge seat on the base frame, the upper semi-gear ring is rotatably mounted in a slide groove on the upper semicircular ring, the lower semicircular ring is fixedly welded to the base frame, and the lower semi-gear ring is rotatably mounted in a slide groove on the lower semicircular ring.

[0008] Preferably, the transmission assembly includes: a transmission shaft II, a servo motor, and a connecting frame; the transmission shaft II is rotatably installed in the circular hole at the bottom of the base frame, the spur gears fixedly installed at both ends of the transmission shaft II are meshed with the lower half gear ring, the bevel gear in the middle of the transmission shaft II is meshed with the motor bevel gear of the servo motor, the servo motor is fixedly installed on the connecting frame, and the connecting frame is fixedly installed between the base frames.

[0009] Preferably, the rotating assembly includes: a support frame, a disc, a cylinder III, a sleeve, a driven gear II, a rack, a cylinder IV, and a base plate; the upper end of the support frame contacts the steel pipe, the rod-shaped part of the support frame is slidably installed in the sleeve, the disc is fixedly installed in the middle of the support frame, the disc is slidably connected to the groove provided on the piston rod of the cylinder III, and the cylinder body of the cylinder III is fixedly embedded and installed on the base plate; the sleeve is rotatably installed in a circular hole on the base plate, and a driven gear II is fixedly installed on the sleeve, the driven gear II is meshed with the rack, and the rack is slidably installed in a raised groove on the base plate, the piston rod of the cylinder IV is fixedly connected to the protrusion on the side of the rack, and the cylinder body of the cylinder IV is fixedly installed on the base plate.

[0010] Preferably, the adjustable turning processing mechanism includes: a sliding frame, a slider II, a screw rod I, a stepper motor III, a turning tool, a vertical frame, a stepper motor IV, and a screw rod II; the sliding frame is slidably installed on the slide rail between the vertical frames, the sliding frame is threadedly connected to the screw rod II, both ends of the screw rod II are rotatably installed in the circular hole on the vertical frame, one end of the screw rod II is fixedly connected to the motor shaft of the stepper motor IV, and the stepper motor IV is fixedly installed on the extension plate of the vertical frame; the slider II is slidably installed on the slide rail on the sliding frame, the slider II is threadedly connected to the screw rod I, both ends of the screw rod I are rotatably installed in the circular hole of the extension plate on the sliding frame, one end of the screw rod I is fixedly connected to the motor shaft of the stepper motor III, the stepper motor III is fixedly installed on the sliding frame, and two turning tools are provided, both of which are fixedly installed on the slider II.

[0011] Preferably, four rolling wheels are provided, the upper and lower two threads are identical, the left and right two threads are identical, and the thread spacing of the upper and lower rolling wheels is narrower than the thread spacing of the left and right rolling wheels.

[0012] Preferably, the tool tips of the two turning tools are in opposite directions.

[0013] The beneficial effects of the present invention compared with the prior art are:

[0014] 1. When the present invention is used, the internal and external threads of the steel pipe are processed by combining rolling and turning. The processing method can be selected according to specific needs during processing, and the internal and external threads can be processed simultaneously, or the internal threads or the external threads can be selectively processed.

[0015] 2. When in use, this device can fix the steel pipe and rotate it at the same time. Different from the traditional clamping mechanism, this device clamps the middle of the steel pipe to expose both ends of the steel pipe, which can meet the needs of simultaneous processing on both sides. It can also rotate the steel pipe 180 degrees to better meet the needs of using the same processing method on both sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an isometric view of the overall structure of the present invention.

[0017] Figure 2 It is a side view of the overall structure of the present invention.

[0018] Figure 3 This is a first viewing angle diagram of the adjustable rolling processing mechanism of the present invention.

[0019] Figure 4 This is a second viewing angle diagram of the adjustable rolling processing mechanism of the present invention.

[0020] Figure 5 It is a schematic structural diagram of the cross bracket of the present invention.

[0021] Figure 6 This is a first perspective view of the steel pipe control mechanism of the present invention.

[0022] Figure 7 This is a second viewing angle diagram of the steel pipe control mechanism of the present invention.

[0023] Figure 8 It is a structural schematic diagram of the rotating assembly of the steel pipe control mechanism of the present invention.

[0024] Fig. 9 This is a first viewing angle diagram of the adjustable turning mechanism of the present invention.

[0025] Fig.10 This is a second viewing angle diagram of the adjustable turning mechanism of the present invention.

[0026] Figure numerals: 1, cross bracket; 2, slider Ⅰ; 3, hydraulic cylinder; 4, transmission shaft Ⅰ; 5, rolling wheel; 6, extension bracket Ⅰ; 7, stepping motor Ⅰ; 8, belt; 9, connecting rod; 10, central axis; 11, driven gear Ⅰ; 12, right angle bracket; 13, extension bracket Ⅱ; 14, stepping motor Ⅱ; 15, cylinder Ⅰ; 16, connecting ring; 17, bottom frame; 18, cylinder Ⅱ; 19, upper semicircular ring; 20, upper semi-gear ring; 21 , lower half ring; 22, lower half gear ring; 23, transmission shaft II; 24, servo motor; 25, connecting frame; 26, support frame; 27, disc; 28, cylinder III; 29, sleeve; 30, driven gear II; 31, rack; 32, cylinder IV; 33, bottom plate; 34, sliding frame; 35, slider II; 36, screw rod I; 37, stepper motor III; 38, turning tool; 39, vertical frame; 40, stepper motor IV; 41, screw rod II. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further specifically described below by way of embodiments and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when in use. They are only for the convenience of describing the simplified description of the invention patent, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention patent. In addition, spatially relative terms may be used in the text for the convenience of description, such as "below", "below", "below", "above", "above", etc., to describe the relationship of an element or feature relative to other elements or features as shown in the figure. Spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptors used in the text may also be interpreted accordingly.

[0029] Implementation example Figure 1-Figure 10 As shown, an internal and external thread processing device for stainless steel pipes includes an adjustable rolling processing mechanism, a steel pipe control mechanism, and an adjustable turning processing mechanism;

[0030] In an optional implementation manner of the embodiment of the present invention, as Figure 3 , Figure 4 , Figure 5 As shown, the adjustable rolling processing mechanism includes: a cross bracket 1, a slider Ⅰ2, a hydraulic cylinder 3, a transmission shaft Ⅰ4, a rolling wheel 5, an extension bracket Ⅰ6, a stepper motor Ⅰ7, a belt 8, a connecting rod 9 and a linkage matching component; there are four sliders Ⅰ2, which are slidably mounted in four slide grooves on the cross bracket 1, the cylinder body of the hydraulic cylinder 3 is fastened to the cross bracket 1 by bolts, the piston rod of the hydraulic cylinder 3 is fixedly connected to the slider Ⅰ2, the transmission shaft Ⅰ4 is rotatably mounted in the circular hole on the slider Ⅰ2, and the rolling wheel 5 is fixedly mounted on the transmission shaft Ⅰ4; the extension bracket Ⅰ6 is fixedly welded to the slider Ⅰ2, the stepper motor Ⅰ7 is fastened to the extension bracket Ⅰ6 by bolts, the motor shaft of the stepper motor Ⅰ7 is fixedly connected to one end of the transmission shaft Ⅰ4, and a pulley is also provided on the transmission shaft Ⅰ4, and the pulleys on the four transmission shafts Ⅰ4 are connected by belts 8, and there are also four connecting rods 9, and the two ends of each connecting rod 9 are rotatably mounted on the adjacent transmission shaft Ⅰ4, so that the four connecting rods 9 complete the limit of the transmission shaft Ⅰ4.

[0031] In an optional implementation manner of the embodiment of the present invention, as Figure 4As shown, the linkage matching assembly includes: a central shaft 10, a driven gear Ⅰ11, a right-angle bracket 12, an extension bracket Ⅱ13, a stepping motor Ⅱ14, a cylinder Ⅰ15, and a connecting ring 16; the middle of the central shaft 10 is movably installed in the circular hole in the middle of the cross bracket 1, and one end of the central shaft 10 is provided with two sections of thread, the pitch of the two sections of thread is wide and the pitch of the two sections is narrow, and the outermost section is smooth; the driven gear Ⅰ11 is slidably installed on the convex groove on the central shaft 10, and the right-angle bracket 12 is fixedly installed on the cross bracket 1, and the right-angle The bracket 12 is provided with a buckle, which is slidably connected to the annular groove on the driven gear I11, so as to limit the driven gear I11. The extension bracket II13 is fixedly welded to the right-angle bracket 12, and the cylinder I15 is fixedly installed on the extension bracket II13. The piston rod of the cylinder I15 is fixedly connected to the connecting ring 16, and the connecting ring 16 is rotatably installed on the central shaft 10; the stepper motor II14 is fixedly installed on the right-angle bracket 12, and the motor gear of the stepper motor II14 is meshed with the driven gear I11.

[0032] In an optional implementation manner of the embodiment of the present invention, as Figure 6 , Figure 7 As shown, the steel pipe control mechanism includes: a base frame 17, a cylinder II 18, an upper semicircular ring 19, an upper semi-gear ring 20, a lower semicircular ring 21, a lower semi-gear ring 22 transmission assembly and a rotating assembly; the cylinder body of the cylinder II 18 is rotatably mounted on the hinge seat on the base frame 17, the piston rod of the cylinder II 18 is rotatably connected to the hinge seat on the upper semicircular ring 19, the upper semicircular ring 19 is rotatably mounted on the hinge seat on the base frame 17, the upper semi-gear ring 20 is rotatably mounted in the slide groove on the upper semicircular ring 19, the lower semicircular ring 21 is fixedly welded on the base frame 17, and the lower semi-gear ring 22 is rotatably mounted in the slide groove on the lower semicircular ring 21. When the upper semicircular ring 19 and the lower semicircular ring 21 are completely aligned and merged, the upper semi-gear ring 20 and the lower semi-gear ring 22 are spliced ​​into a completed gear ring.

[0033] In an optional implementation manner of the embodiment of the present invention, as Figure 6 , Figure 7 As shown, the transmission assembly includes: a transmission shaft II 23, a servo motor 24, and a connecting frame 25; the transmission shaft II 23 is rotatably installed in the circular hole at the bottom of the base frame 17, the spur gears fixedly installed at both ends of the transmission shaft II 23 are meshed with the lower half gear ring 22, the bevel gear in the middle of the transmission shaft II 23 is meshed with the motor bevel gear of the servo motor 24, the servo motor 24 is fixedly installed on the connecting frame 25, and the connecting frame 25 is fixedly installed between the base frames 17.

[0034] In an optional implementation manner of the embodiment of the present invention, as Figure 8As shown, the rotating assembly includes: a support frame 26, a disc 27, a cylinder III 28, a sleeve 29, a driven gear II 30, a rack 31, a cylinder IV 32, and a base plate 33; the upper end of the support frame 26 is in contact with the steel pipe, the rod-shaped part of the support frame 26 is slidably installed in the sleeve 29, the disc 27 is fixedly installed in the middle of the support frame 26, the disc 27 is slidably connected with the groove provided on the piston rod of the cylinder III 28, and the cylinder body of the cylinder III 28 is fixedly embedded and installed on the base plate 33; the sleeve 29 is rotatably installed in the circular hole on the base plate 33, the driven gear II 30 is fixedly installed on the sleeve 29, the driven gear II 30 is meshed with the rack 31, the rack 31 is slidably installed in the raised groove on the base plate 33, the piston rod of the cylinder IV 32 is fixedly connected with the protrusion on the side of the rack 31, and the cylinder body of the cylinder IV 32 is fixedly installed on the base plate 33.

[0035] In an optional implementation manner of the embodiment of the present invention, as Fig. 9 , Fig.10 As shown, the adjustable turning mechanism includes: a sliding frame 34, a slider II 35, a screw rod I 36, a stepper motor III 37, a turning tool 38, a vertical frame 39, a stepper motor IV 40, and a screw rod II 41; the sliding frame 34 is slidably mounted on the slide rail between the vertical frames 39, the sliding frame 34 is threadedly connected to the screw rod II 41, both ends of the screw rod II 41 are rotatably mounted in the circular hole on the vertical frame 39, one end of the screw rod II 41 is fixedly connected to the motor shaft of the stepper motor IV 40, and the stepper motor IV 40 is fixedly mounted on the extension plate of the vertical frame 39; the sliding frame II 35 is slidably mounted on the sliding rail on the sliding frame 34, the sliding frame II 35 is threadedly connected to the screw rod I 36, both ends of the screw rod I 36 are rotatably mounted in the circular hole of the extension plate on the sliding frame 34, one end of the screw rod I 36 is fixedly connected to the motor shaft of the stepper motor III 37, the stepper motor III 37 is fixedly mounted on the sliding frame 34, and two turning tools 38 are provided, both of which are fixedly mounted on the sliding frame II 35.

[0036] In an optional implementation manner of the embodiment of the present invention, as Figure 3 As shown, four rolling wheels 5 are provided, the upper and lower two threads are identical, and the left and right two threads are identical, and the thread pitch of the upper and lower two rolling wheels 5 is narrower than the thread pitch of the left and right rolling wheels 5 .

[0037] In an optional implementation manner of the embodiment of the present invention, as Fig.10 As shown, the tool tips of the two turning tools 38 are facing each other.

[0038] Working principle: When the present invention is used, it has a wide range of processing options. First, the steel pipe to be processed is placed in the lower semicircular ring 21, and one end of the steel pipe is moved to the middle of the four rolling wheels 5. Then, the cylinder II 18 is started to drive the upper semicircular ring 19 to close, so that the upper half gear ring 20 and the lower half gear ring 22 clamp the steel pipe, and the upper half gear ring 20 and the lower half gear ring 22 form a completed gear ring. Then, the cylinder I 15 is started to drive the central shaft 10 to move into the steel pipe through the connecting ring 16. There are threads with different thread pitches on the central shaft 10. According to needs, a wide or narrow thread pitch or a part without threads at the outermost end can be selected, and the selected part is moved to the middle of the rolling wheel 5. The corresponding rolling wheel 5 also needs to be threaded. The hydraulic cylinder 3 is started to drive the upper slider Ⅰ2 to slide up and down. The transmission shaft Ⅰ4 is connected through the connecting rod 9. When the slider Ⅰ2 slides upward, the upper and lower rolling wheels 5 are away from the central axis 10, and the left and right rolling wheels 5 are close to the central axis 10. In this way, the left and right rolling wheels 5 are selected for processing, and vice versa, the upper and lower rolling wheels 5 are selected for processing. Subsequently, the stepper motor Ⅱ14 and the stepper motor Ⅰ7 are started synchronously. The stepper motor Ⅱ14 drives the central axis 10 to rotate through the driven gear Ⅰ11, and the stepper motor Ⅰ7 drives the transmission shaft Ⅰ4 to rotate through the belt 8, so that the rolling wheel 5 rotates to process the steel pipe. This is the rolling thread processing;

[0039] If turning processing is required, the stepper motor IV40 is started to drive the screw rod II41 to rotate, thereby driving the slide frame 34 to move toward the steel pipe, and the stepper motor III37 is started to drive the screw rod I36 to rotate, thereby driving the slider II35 to slide on the slide frame 34, thereby adjusting the position of the turning tool 38. One of the tool heads of the turning tool 38 is outside the steel pipe, and the other tool head is inside the steel pipe. By moving the position of the slider II35, the internal turning tool 38 or the external turning tool 38 is selected to perform thread processing on the inner and outer walls of the steel pipe. When the slide frame 34 moves toward the steel pipe, the servo motor 24 is started to drive the transmission shaft II23 to rotate. The transmission shaft II23 drives the upper half gear ring 20 and the lower half gear ring 22 to rotate, thereby driving the steel pipe to rotate, which is convenient for turning;

[0040] The device can also rotate the steel pipe 180 degrees, so as to facilitate the same processing of the other end of the steel pipe. Specifically, the upper semicircular ring 19 is opened first, and then the cylinder III 28 is started to drive the disc 27 to move upward, so that the steel pipe is lifted through the support frame 26. When it is lifted to a certain height, the cylinder IV 32 drives the rack 31 to slide, and the rack 31 drives the driven gear II 30 to rotate 180 degrees, so that the sleeve 29 rotates 180 degrees, that is, drives the steel pipe to rotate 180 degrees, and then puts the steel pipe down, closes and clamps the upper semicircular ring 19 again, so that the other end of the steel pipe can be processed in the same way.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An internal and external thread processing equipment for stainless steel pipes, characterized in that: The invention comprises an adjustable rolling processing mechanism, a steel pipe control mechanism, and an adjustable turning processing mechanism; the adjustable rolling processing mechanism comprises: a cross bracket (1), a slider I (2), a hydraulic cylinder (3), a transmission shaft I (4), a rolling wheel (5), an extension bracket I (6), a stepping motor I (7), a belt (8), a connecting rod (9), and a linkage matching component; there are four sliders I (2), which are slidably mounted in four slide grooves on the cross bracket (1); the cylinder body of the hydraulic cylinder (3) is fastened to the cross bracket (1) by bolts; the piston rod of the hydraulic cylinder (3) is fixedly connected to the slider I (2) , the transmission shaft I (4) is rotatably mounted in the circular hole on the slider I (2), and the rolling wheel (5) is fixedly mounted on the transmission shaft I (4); the extension bracket I (6) and the slider I (2) are fixedly welded together, the stepper motor I (7) is fastened to the extension bracket I (6) by bolts, the motor shaft of the stepper motor I (7) is fixedly connected to one end of the transmission shaft I (4), and the transmission shaft I (4) is also provided with a pulley, and the pulleys on the four transmission shafts I (4) are connected by a belt (8), and there are also four connecting rods (9), and both ends of each connecting rod (9) are rotatably mounted on the adjacent transmission shaft I (4); The linkage matching assembly comprises: a central shaft (10), a driven gear I (11), a right-angle bracket (12), an extension bracket II (13), a stepping motor II (14), a cylinder I (15), and a connecting ring (16); the middle of the central shaft (10) is movably mounted in the circular hole in the middle of the cross bracket (1); one end of the central shaft (10) is provided with two sections of thread, the pitch of the two sections of thread is one wide and the other narrow, and the outermost section is smooth; the driven gear I (11) is slidably mounted on the convex groove on the central shaft (10), and the right-angle bracket (12) is fixedly mounted on the cross bracket (1), a buckle is provided on the right-angle bracket (12), and the buckle is slidably connected with the annular groove on the driven gear I (11); an extension bracket II (13) is fixedly welded on the right-angle bracket (12), and a cylinder I (15) is fixedly installed on the extension bracket II (13), and a piston rod of the cylinder I (15) is fixedly connected with a connecting ring (16), and the connecting ring (16) is rotatably installed on the central shaft (10); a stepper motor II (14) is fixedly installed on the right-angle bracket (12), and a motor gear of the stepper motor II (14) is meshed with the driven gear I (11); The steel pipe control mechanism comprises: a base frame (17), a cylinder II (18), an upper semicircular ring (19), an upper semi-gear ring (20), a lower semicircular ring (21), a lower semi-gear ring (22) transmission assembly and a rotating assembly; the cylinder body of the cylinder II (18) is rotatably mounted on a hinge seat on the base frame (17), the piston rod of the cylinder II (18) is rotatably connected to the hinge seat on the upper semicircular ring (19), the upper semicircular ring (19) is rotatably mounted on the hinge seat on the base frame (17), the upper semi-gear ring (20) is rotatably mounted in a slide groove on the upper semicircular ring (19), the lower semicircular ring (21) is fixedly welded to the base frame (17), and the lower semi-gear ring (22) is rotatably mounted in a slide groove on the lower semicircular ring (21); The adjustable turning mechanism comprises: a sliding frame (34), a slider II (35), a screw rod I (36), a stepping motor III (37), a turning tool (38), a vertical frame (39), a stepping motor IV (40), and a screw rod II (41); the sliding frame (34) is slidably mounted on a slide rail between the vertical frames (39), the sliding frame (34) is threadedly connected to the screw rod II (41), both ends of the screw rod II (41) are rotatably mounted in a circular hole on the vertical frame (39), and one end of the screw rod II (41) is fixedly connected to the motor shaft of the stepping motor IV (40). Then, the stepper motor IV (40) is fixedly mounted on the extension plate of the vertical frame (39); the slider II (35) is slidably mounted on the slide rail on the sliding frame (34); the slider II (35) is threadedly connected to the screw rod I (36); both ends of the screw rod I (36) are rotatably mounted in the circular holes of the extension plate on the sliding frame (34); one end of the screw rod I (36) is fixedly connected to the motor shaft of the stepper motor III (37); the stepper motor III (37) is fixedly mounted on the sliding frame (34); and two turning tools (38) are provided, both of which are fixedly mounted on the slider II (35).

2. The internal and external thread processing equipment for stainless steel pipe according to claim 1, characterized in that: The transmission assembly comprises: a transmission shaft II (23), a servo motor (24), and a connecting frame (25); the transmission shaft II (23) is rotatably mounted in a circular hole at the bottom of the base frame (17); spur gears fixedly mounted at both ends of the transmission shaft II (23) mesh with the lower half gear ring (22); a bevel gear in the middle of the transmission shaft II (23) meshes with the motor bevel gear of the servo motor (24); the servo motor (24) is fixedly mounted on the connecting frame (25); and the connecting frame (25) is fixedly mounted between the base frames (17).

3. The internal and external thread processing equipment for stainless steel pipe according to claim 1, characterized in that: The rotating assembly comprises: a support frame (26), a disc (27), a cylinder III (28), a sleeve (29), a driven gear II (30), a rack (31), a cylinder IV (32), and a bottom plate (33); the upper end of the support frame (26) contacts the steel pipe, the rod-shaped portion of the support frame (26) is slidably mounted in the sleeve (29), the disc (27) is fixedly mounted in the middle of the support frame (26), the disc (27) is slidably connected to a groove provided on the piston rod of the cylinder III (28), and the cylinder IV (32) is slidably mounted on the bottom plate (33). The cylinder body of cylinder III (28) is fixedly mounted on the bottom plate (33); the sleeve (29) is rotatably mounted in a circular hole on the bottom plate (33); a driven gear II (30) is fixedly mounted on the sleeve (29); the driven gear II (30) is meshed with a rack (31); the rack (31) is slidably mounted in a raised groove on the bottom plate (33); the piston rod of cylinder IV (32) is fixedly connected to a raised portion on a side of the rack (31); and the cylinder body of cylinder IV (32) is fixedly mounted on the bottom plate (33).

4. The internal and external thread processing equipment for stainless steel pipe according to claim 1, characterized in that: The rolling wheels (5) are provided with four threads, the upper and lower two threads are identical, and the left and right two threads are identical. The thread pitch of the upper and lower rolling wheels (5) is narrower than the thread pitch of the left and right rolling wheels (5).

5. The internal and external thread processing equipment for stainless steel pipe according to claim 1, characterized in that: The tool tips of the two turning tools (38) are directed in opposite directions.

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