Cutting device for internal and external threads of 304 steel pipe

Abstract

The invention discloses a 304 steel pipe internal and external thread cutting device, and belongs to the technical field of thread cutting, the 304 steel pipe internal and external thread cutting device comprises a main frame mechanism, and the main frame mechanism is provided with two machining mechanisms used for cutting internal threads and external threads of a steel pipe and a fixing mechanism used for clamping and fixing the steel pipe; the main frame mechanism can drive the two machining mechanisms to rotate while sliding inwards at the same time, an external thread tool bit and an internal thread tool bit machine the two ends of a 304 steel pipe at the same time, only one-time clamping is needed for machining internal and external threads of the 304 steel pipe, and the machining efficiency is high; the 304 steel pipe is clamped through the grooves of the upper pressing piece and the lower supporting seat, so that when internal and external threads of the 304 steel pipe are machined, the 304 steel pipe is stably clamped, when the upper pressing piece ascends, the machined 304 steel pipe is automatically pushed out through the ejection block, the next to-be-machined 304 steel pipe is pushed to the position below the upper pressing piece through the push-in block, automatic feeding and discharging are achieved, and the machining efficiency is improved. The automation degree is high and the continuity is good.

Description

Technical Field

[0001] The present invention relates to the technical field of thread cutting, and particularly relates to an internal and external thread cutting device for 304 steel pipes. Background Art

[0002] A 304 steel pipe refers to a steel pipe made of 304 stainless steel material, which is widely used in many industrial fields, especially in environments with high corrosion resistance requirements. 304 stainless steel itself belongs to austenitic stainless steel, containing 18% chromium and 8% nickel, which makes 304 steel pipes have good corrosion resistance, excellent mechanical properties and good workability. The internal and external thread cutting device for 304 steel pipes is mainly used for processing threads on the inner and outer surfaces of 304 stainless steel pipes. Such equipment is mainly applied to the manufacture of structures such as stainless steel pipe joints and valve interfaces. Especially in places where pipes need to be connected, by cutting internal and external threads, the pipes can be mechanically connected to other pipes or equipment; the existing internal and external thread cutting devices for steel pipes usually cannot process the internal and external threads of 304 steel pipes simultaneously, and need to be clamped separately, which is inconvenient to use and has poor automation. Summary of the Invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: an internal and external thread cutting device for 304 steel pipes, including a main frame mechanism. The main frame mechanism includes a box body, and an upper plate is fixedly installed on the box body. Two processing mechanisms for cutting internal and external threads of the steel pipe respectively and a fixing mechanism for clamping and fixing the steel pipe are arranged on the main frame mechanism. The processing mechanism includes a sliding frame, and an internal thread seat is fixedly installed below the sliding frame. The fixing mechanism includes a lower support seat, and the lower support seat is fixedly installed on the upper plate; The main frame mechanism includes a vertical rotating shaft rotatably installed on the box body. A vertical shaft chute is arranged on the vertical rotating shaft. A sliding rail is fixedly installed on the upper plate. The sliding frame is slidably installed on the sliding rail. A fixed rotating frame is fixedly installed on the upper plate. An inner rotating sleeve is rotatably installed on the fixed rotating frame. A chute rod is slidably installed in the inner rotating sleeve through a chute, and a connecting block is fixedly installed on the chute rod; The fixing mechanism includes an inner lifting plate. An inner chute bevel gear is rotatably installed on the inner lifting plate. The inner chute bevel gear slides in the vertical shaft chute. A spring piece is rotatably installed on the inner chute bevel gear. A return spring is arranged between the spring piece and the upper plate.

[0004] Further, the main frame mechanism further includes an inner motor fixedly installed in the box body. A motor bevel gear is fixedly installed on the motor shaft of the inner motor. An axle frame is fixedly installed in the box body. Two side rotating shafts are rotatably installed on the axle frame. A side docking bevel gear, an inner transmission wheel and an outer transmission wheel are fixedly installed on the side rotating shafts. The side docking bevel gear meshes with the inner chute bevel gear. A lower bevel gear is fixedly installed on the vertical rotating shaft. The lower bevel gear meshes with the motor bevel gear.

[0005] Furthermore, an upper transmission wheel is fixedly installed on the inner rotating sleeve, and an outer transmission belt is wrapped around the upper transmission wheel and the outer transmission wheel. A screw is rotatably installed under the upper plate, and a screw wheel is fixedly installed on the screw, and an inner transmission belt is wrapped around the screw wheel and the inner transmission wheel. The internal threaded seat and the side-jointed bevel gear form a threaded transmission.

[0006] When the steel pipe is clamped, the inner groove bevel gear meshes with the two side docking bevel gears, and the inner motor drives the motor bevel gear to rotate, driving the lower bevel gear, the vertical shaft and the inner groove bevel gear to rotate, thereby driving the side docking bevel gear, the side shaft, the inner transmission wheel and the outer transmission wheel to rotate, and the upper transmission wheel, the inner rotating sleeve and the connecting block are driven to rotate through the outer transmission belt, thereby driving the two processing mechanisms to rotate, and the inner transmission wheel drives the screw wheel and the screw to rotate through the inner transmission belt, and the screw drives the internal thread seat and the slide to slide inward along the slide rail, thereby realizing the external thread cutter head and the internal thread cutter head rotating and sliding inward at the same time, and processing the external thread on one end of the steel pipe is performed by the external thread cutter head, and processing the internal thread on the other end of the steel pipe is performed by the internal thread cutter head. When the slide moves to the innermost side along the slide rail, the internal and external thread processing of the steel pipe is completed, and then the inner motor reverses, thereby driving the external thread cutter head and the internal thread cutter head to rotate spirally outward in the opposite direction, so that the external thread cutter head and the internal thread cutter head exit the two ends of the steel pipe.

[0007] Furthermore, the processing mechanism includes a rotating seat fixedly mounted on the slide, a rotating cylinder is rotatably mounted in the rotating seat, a connecting disk is fixedly mounted on the rotating cylinder, and the connecting disk is fixedly mounted on the connecting block.

[0008] Furthermore, three clamping blocks are slidably installed on the rotating cylinder, a rotating gear disk is rotatably installed in the rotating cylinder, a spiral linear track is provided on the rotating gear disk, the clamping blocks slide along the track of the spiral linear track, three hexagonal heads are rotatably installed on the rotating cylinder, an adjusting bevel gear is fixedly installed on the hexagonal heads, and the adjusting bevel gear is meshed with the rotating gear disk.

[0009] Furthermore, an external thread cutter head is clamped between the three clamping blocks of the fixing mechanism for processing external threads, and an internal thread cutter head is clamped between the three clamping blocks of the fixing mechanism for processing internal threads.

[0010] When in use, place the external thread cutter head and the internal thread cutter head between the three clamping blocks of the two fixing mechanisms respectively, and use the internal hexagonal wrench to screw the internal hexagonal head to drive the adjusting bevel gear to rotate, thereby driving the rotating gear plate to rotate, and driving the three clamping blocks to move inward at the same time through the vortex linear rail, so as to realize the clamping of the external thread cutter head and the internal thread cutter head by the clamping blocks. When the inner rotating sleeve rotates, the connecting plate, rotating cylinder, rotating seat, clamping block and external thread cutter head are driven to rotate through the connecting block, and the internal thread cutter head is driven to rotate similarly. When the slide and the rotating seat slide inward along the slide rail, the slide groove rod slides along the inner rotating sleeve.

[0011] Further, the fixing mechanism further includes a downward pressing guide rod slidably mounted on the upper plate. An inner lifting plate is fixedly mounted on the downward pressing guide rod. An inner electric cylinder is fixedly mounted inside the box body. The output end of the inner electric cylinder is fixedly mounted with the inner lifting plate. An upper spring is arranged between the inner lifting plate and the upper plate. A downward pressing frame is fixedly mounted on the downward pressing guide rod. Two downward pressing sleeves are fixedly mounted on the downward pressing frame. An inner sliding rod is slidably mounted inside the downward pressing sleeve. A pressing spring is arranged between the inner sliding rod and the downward pressing sleeve. An upper pressing piece is fixedly mounted on the inner sliding rod.

[0012] Further, a feeding box is fixedly mounted on the upper plate. A number of steel pipes are placed inside the feeding box. A slope is arranged inside the feeding box. An inner ejecting rod is fixedly mounted on the inner lifting plate. An ejecting block and a pushing block are fixedly mounted on the inner ejecting rod. The ejecting block and the pushing block are slidably mounted with the lower support seat. The upper surface of the pushing block is a slope.

[0013] When processing the steel pipe, the upper pressing piece presses the steel pipe against the lower support seat. At this time, the pressing spring is in a compressed state. After the internal and external threads of the steel pipe are processed, the inner electric cylinder extends, driving the inner lifting plate to rise. The rising of the inner lifting plate causes the inner chute bevel gear to disengage from the side docking bevel gear. The upper spring is compressed. At this time, the side rotating shaft stops rotating, and the rotating cylinder and the sliding frame stop moving. The downward pressing guide rod slides along the upper plate, and the upper spring is compressed, thereby driving the downward pressing frame and the downward pressing sleeve to rise. First, the pressing spring rebounds. When the pressing spring is fully released, the downward pressing frame starts to drive the upper pressing piece to rise, causing the upper pressing piece to disengage from the steel pipe. In the initial state, the lower support seat blocks the steel pipe in the feeding box. After the upper pressing piece disengages from the steel pipe, the ejecting block jacks up the steel pipe on the lower support seat. The steel pipe rolls out along the upper surface of the ejecting block. The pushing block jacks up the steel pipe above it. The steel pipe rolls along the upper surface of the lower support seat to the ejecting block and is blocked by the ejecting block. Subsequently, the inner electric cylinder contracts, driving the inner lifting plate, the ejecting block and the pushing block to descend. The ejecting block descends, and the steel pipe rolls into the groove of the lower support seat. And the pushing block descends. Subsequently, the downward pressing guide rod descends, causing the upper pressing piece to contact the steel pipe on the groove of the lower support seat. Subsequently, the downward pressing guide rod continues to descend, causing the pressing spring to be compressed. The steel pipe is pressed against the lower support seat by the upper pressing piece. And the inner chute bevel gear meshes with the side docking bevel gear again, and starts to process the internal and external threads of the next steel pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) the main frame mechanism provided in the present invention can drive the two processing mechanisms to slide inward and rotate at the same time, so that the external thread cutter head and the internal thread cutter head can process the two ends of the 304 steel pipe at the same time, so that the internal and external thread processing of a 304 steel pipe only requires one clamping, and the processing efficiency is high; (2) when the fixing mechanism provided in the present invention descends, the 304 steel pipe is clamped by the grooves of the upper pressing plate and the lower support seat, so that the 304 steel pipe is firmly clamped when the internal and external threads are processed, and when the upper pressing plate rises, the processed 304 steel pipe is automatically pushed out by the ejection block, and the next 304 steel pipe to be processed is pushed to the bottom of the upper pressing plate by the push-in block, so that automatic loading and unloading is realized, with a high degree of automation and good continuity; (3) when the inner lifting plate provided in the present invention starts to rise, the inner groove bevel gear is separated from the side docking bevel gear, so that when the 304 steel pipe is not completely clamped, the external thread cutter head and the internal thread cutter head will not move or rotate. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a schematic diagram of the overall structure of the present invention (interior).

[0017] Figure 3 The main frame structure of the present invention is shown in FIG. Figure 1 .

[0018] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0019] Figure 5 The main frame structure of the present invention is shown in FIG. Figure 2 .

[0020] Figure 6 for Figure 5 A local enlarged schematic diagram of point B in the middle.

[0021] Figure 7 The processing mechanism structure of the present invention is shown in FIG. Figure 1 .

[0022] Figure 8 The processing mechanism structure of the present invention is shown in FIG. Figure 2 .

[0023] Figure 9 The processing mechanism structure of the present invention is shown in FIG. Figure 3 .

[0024] Figure 10 The fixing mechanism structure of the present invention is shown in FIG. Figure 1 .

[0025] Figure 11 Structural Schematic of the Fixing Mechanism of the Present Invention Figure 2 。

[0026] Figure 12 Structural Schematic of the Fixing Mechanism of the Present Invention Figure 3 。

[0027] Reference Numerals in the Drawings: 101 - Box Body; 102 - Upper Plate; 103 - Inner Motor; 104 - Motor Bevel Gear; 105 - Vertical Rotating Shaft; 106 - Lower Bevel Gear; 107 - Shaft Bracket; 108 - Side Rotating Shaft; 109 - Side Docking Bevel Gear; 110 - Inner Transmission Wheel; 111 - Outer Transmission Wheel; 112 - Outer Transmission Belt; 113 - Inner Rotating Sleeve; 114 - Upper Transmission Wheel; 115 - Sliding Groove Rod; 116 - Fixed Rotating Frame; 117 - Connecting Block; 118 - Inner Transmission Belt; 119 - Lead Screw; 120 - Lead Screw Wheel; 121 - Slide Rail; 122 - Vertical Shaft Sliding Groove; 201 - Slide Frame; 202 - Rotating Seat; 203 - Clamping Block; 204 - External Thread Tool Bit; 205 - Internal Thread Tool Bit; 206 - Rotating Tooth Disc; 207 - Rotating Tube; 208 - Adjusting Bevel Gear; 209 - Internal Hexagon Head; 210 - Connecting Disc; 211 - Internal Thread Seat; 212 - Spiral Rail; 301 - Lower Support Seat; 302 - Feeding Box; 303 - Lower Pressing Guide Rod; 304 - Lower Pressing Frame; 305 - Lower Pressing Sleeve; 306 - Inner Slide Rod; 307 - Upper Pressing Piece; 308 - Inner Electric Cylinder; 309 - Inner Lifting Plate; 310 - Inner Sliding Groove Bevel Gear; 311 - Spring Piece; 312 - Inner Jacking Rod; 313 - Ejecting Block; 314 - Pushing Block; 315 - Upper Spring; 316 - Compression Spring; 317 - Return Spring; 4 - Steel Pipe. Detailed Embodiment

[0028] The following further describes the detailed embodiment of the present invention with reference to the accompanying drawings.

[0029] Embodiment: Refer to Figures 1 - 12 , a device for cutting internal and external threads of 304 steel pipes, including a main frame mechanism. The main frame mechanism includes a box body 101, an upper plate 102 is fixedly installed on the box body 101. There are two processing mechanisms for cutting internal and external threads of the steel pipe 4 respectively and a fixing mechanism for clamping and fixing the steel pipe 4 on the main frame mechanism. The processing mechanism includes a slide frame 201, an internal thread seat 211 is fixedly installed below the slide frame 201. The fixing mechanism includes a lower support seat 301, and the lower support seat 301 is fixedly installed on the upper plate 102; The main frame mechanism includes a vertical rotating shaft 105 rotatably installed on the box body 101. A vertical shaft chute 122 is provided on the vertical rotating shaft 105. A slide rail 121 is fixedly installed on the upper plate 102. A sliding frame 201 is slidably installed on the slide rail 121. A fixed rotating frame 116 is fixedly installed on the upper plate 102. An inner rotating sleeve 113 is rotatably installed on the fixed rotating frame 116. A chute rod 115 is slidably installed in the inner rotating sleeve 113 through a chute. A connecting block 117 is fixedly installed on the chute rod 115; The fixing mechanism includes an inner lifting plate 309. An inner chute bevel gear 310 is rotatably installed on the inner lifting plate 309. The inner chute bevel gear 310 slides in the vertical shaft chute 122. A spring piece 311 is rotatably installed on the inner chute bevel gear 310. A return spring 317 is provided between the spring piece 311 and the upper plate 102.

[0030] As Figures 3 - 6 shown, the main frame mechanism further includes an inner motor 103 fixedly installed in the box body 101. A motor bevel gear 104 is fixedly installed on the motor shaft of the inner motor 103. A shaft frame 107 is fixedly installed in the box body 101. Two side rotating shafts 108 are rotatably installed on the shaft frame 107. A side docking bevel gear 109, an inner transmission wheel 110 and an outer transmission wheel 111 are fixedly installed on the side rotating shafts 108. The side docking bevel gear 109 meshes with the inner chute bevel gear 310. A lower bevel gear 106 is fixedly installed on the vertical rotating shaft 105. The lower bevel gear 106 meshes with the motor bevel gear 104.

[0031] As Figures 3 - 6 shown, an upper transmission wheel 114 is fixedly installed on the inner rotating sleeve 113. An outer transmission belt 112 is wound around the upper transmission wheel 114 and the outer transmission wheel 111. A lead screw 119 is rotatably installed below the upper plate 102. A lead screw wheel 120 is fixedly installed on the lead screw 119. An inner transmission belt 118 is wound around the lead screw wheel 120 and the inner transmission wheel 110. An internal thread seat 211 forms a threaded drive with the side docking bevel gear 109.

[0032] After the steel pipe 4 is clamped, the inner chute bevel gear 310 meshes with the two side docking bevel gears 109. The inner motor 103 drives the motor bevel gear 104 to rotate, driving the lower bevel gear 106, the vertical rotating shaft 105, and the inner chute bevel gear 310 to rotate. Thereby, it drives the side docking bevel gear 109, the side rotating shaft 108, the inner transmission wheel 110, and the outer transmission wheel 111 to rotate. Through the outer transmission belt 112, it drives the upper transmission wheel 114, the inner rotating sleeve 113, and the connecting block 117 to rotate, thereby driving the two processing mechanisms to rotate. The inner transmission wheel 110 drives the lead screw wheel 120 and the lead screw 119 to rotate through the inner transmission belt 118. The lead screw 119 drives the inner threaded seat 211 and the carriage 201 to slide inward along the slide rail 121. Furthermore, it realizes that the external thread cutter head 204 and the internal thread cutter head 205 rotate and slide inward simultaneously. The external thread of one end of the steel pipe 4 is processed by the external thread cutter head 204, and the internal thread of the other end of the steel pipe 4 is processed by the internal thread cutter head 205. When the carriage 201 moves to the innermost side along the slide rail 121, the internal and external thread processing of the steel pipe 4 is completed. Subsequently, the inner motor 103 reverses, thereby driving the external thread cutter head 204 and the internal thread cutter head 205 to rotate outward in the opposite direction in a spiral manner, so that the external thread cutter head 204 and the internal thread cutter head 205 withdraw from both ends of the steel pipe 4.

[0033] As Figures 7 - 9 shown, the processing mechanism includes a rotating seat 202 fixedly installed on the carriage 201. A rotating cylinder 207 is rotatably installed inside the rotating seat 202. A connecting disk 210 is fixedly installed on the rotating cylinder 207, and the connecting disk 210 is fixedly installed with the connecting block 117.

[0034] As Figures 7 - 9 shown, three clamping blocks 203 are slidably installed on the rotating cylinder 207. A rotating gear disk 206 is rotatably installed inside the rotating cylinder 207. A spiral track 212 is provided on the rotating gear disk 206, and the clamping blocks 203 slide along the track of the spiral track 212. Three internal hexagonal heads 209 are rotatably installed on the rotating cylinder 207. An adjusting bevel gear 208 is fixedly installed on the internal hexagonal head 209, and the adjusting bevel gear 208 meshes with the rotating gear disk 206.

[0035] As Figures 7 - 9 shown, an external thread cutter head 204 is clamped between the three clamping blocks 203 of the fixing mechanism for processing external threads, and an internal thread cutter head 205 is clamped between the three clamping blocks 203 of the fixing mechanism for processing internal threads.

[0036] During use, the external thread cutter head 204 and the internal thread cutter head 205 are respectively placed between the three clamping blocks 203 of the two fixing mechanisms. By turning the internal hexagonal head 209 with an internal hexagonal wrench, the adjusting bevel gear 208 is driven to rotate, thereby driving the rotating tooth disc 206 to rotate. Through the spiral track 212, the three clamping blocks 203 are driven to move inward simultaneously, so as to realize the clamping of the external thread cutter head 204 and the internal thread cutter head 205 by the clamping blocks 203. When the inner rotating sleeve 113 rotates, the connecting disc 210, the rotating cylinder 207, the rotating seat 202, the clamping block 203 and the external thread cutter head 204 are driven to rotate through the connecting block 117. Similarly, the internal thread cutter head 205 is driven to rotate. When the carriage 201 and the rotating seat 202 slide inward along the slide rail 121, the chute rod 115 slides along the inner rotating sleeve 113.

[0037] As Figures 10 - 12 shown, the fixing mechanism further includes a downward pressure guide rod 303 slidably mounted on the upper plate 102. An inner lifting plate 309 is fixedly mounted on the downward pressure guide rod 303. An inner electric cylinder 308 is fixedly mounted inside the box body 101. The output end of the inner electric cylinder 308 is fixedly mounted with the inner lifting plate 309. An upper spring 315 is arranged between the inner lifting plate 309 and the upper plate 102. A downward pressure frame 304 is fixedly mounted on the downward pressure guide rod 303. Two downward pressure sleeves 305 are fixedly mounted on the downward pressure frame 304. An inner slide rod 306 is slidably mounted inside the downward pressure sleeve 305. A compression spring 316 is arranged between the inner slide rod 306 and the downward pressure sleeve 305. An upper pressure piece 307 is fixedly mounted on the inner slide rod 306.

[0038] As Figures 10 - 12 shown, a feeding box 302 is fixedly mounted on the upper plate 102. A number of steel pipes 4 are placed inside the feeding box 302. A slope is arranged inside the feeding box 302. An inner ejector rod 312 is fixedly mounted on the inner lifting plate 309. An ejecting block 313 and a pushing block 314 are fixedly mounted on the inner ejector rod 312. The ejecting block 313 and the pushing block 314 are slidably mounted with the lower support seat 301. The upper surface of the pushing block 314 is a slope.

[0039] When processing the steel pipe 4, the upper pressing piece 307 presses the steel pipe 4 tightly on the lower support base 301. At this time, the pressing spring 316 is in a compressed state. After the internal and external threads of the steel pipe 4 are processed, the internal electric cylinder 308 extends, driving the internal lifting plate 309 to rise. The rising of the internal lifting plate 309 causes the internal chute bevel gear 310 to disengage from the side docking bevel gear 109, and the upper spring 315 is compressed. At this time, the side rotating shaft 108 stops rotating, and the rotating cylinder 207 and the sliding frame 201 stop moving. The lower pressing guide rod 303 slides along the upper plate 102, and the upper spring 315 is compressed, thereby driving the lower pressing frame 304 and the lower pressing sleeve 305 to rise. First, the pressing spring 316 rebounds. When the pressing spring 316 is fully released, the lower pressing frame 304 starts to drive the upper pressing piece 307 to rise, so that the upper pressing piece 307 disengages from the steel pipe 4. In the initial state, the lower support base 301 blocks the steel pipe 4 in the feeding box 302. After the upper pressing piece 307 disengages from the steel pipe 4, the ejecting block 313 jacks up the steel pipe 4 on the lower support base 301, and the steel pipe 4 rolls out along the upper surface of the ejecting block 313. The pushing block 314 jacks up the steel pipe 4 above it, and the steel pipe 4 rolls along the upper surface of the lower support base 301 to the ejecting block 313 and is blocked by the ejecting block 313. Subsequently, the internal electric cylinder 308 contracts, driving the internal lifting plate 309, the ejecting block 313 and the pushing block 314 to descend. The ejecting block 313 descends, and the steel pipe 4 rolls into the groove of the lower support base 301. And the pushing block 314 descends. Subsequently, the lower pressing guide rod 303 descends, so that the upper pressing piece 307 contacts the steel pipe 4 on the groove of the lower support base 301. Subsequently, the lower pressing guide rod 303 continues to descend, so that the pressing spring 316 is compressed, and the steel pipe 4 is pressed tightly on the lower support base 301 through the upper pressing piece 307, and the internal chute bevel gear 310 meshes with the side docking bevel gear 109 again, and the internal and external threads of the next steel pipe 4 are processed.

[0040] The working principle of a device for cutting internal and external threads of 304 steel pipes disclosed by the present invention is as follows: When in use, the external thread cutter head 204 and the internal thread cutter head 205 are respectively placed between the three clamping blocks 203 of the two fixing mechanisms. By turning the hexagon socket head 209 with a hexagon wrench, the adjusting bevel gear 208 is driven to rotate, thereby driving the rotating gear disc 206 to rotate. Through the spiral guide rail 212, the three clamping blocks 203 move inward simultaneously, so as to realize the clamping of the external thread cutter head 204 and the internal thread cutter head 205 by the clamping blocks 203. When the inner rotating sleeve 113 rotates, the connecting disc 210, the rotating cylinder 207, the rotating seat 202, the clamping block 203 and the external thread cutter head 204 are driven to rotate by the connecting block 117. Similarly, the internal thread cutter head 205 is driven to rotate. When the carriage 201 and the rotating seat 202 slide inward along the slide rail 121, the chute rod 115 slides along the inner rotating sleeve 113. After the steel pipe 4 is clamped, the inner chute bevel gear 310 meshes with the two side docking bevel gears 109. The inner motor 103 drives the motor bevel gear 104 to rotate, driving the lower bevel gear 106, the vertical rotating shaft 105 and the inner chute bevel gear 310 to rotate, thereby driving the side docking bevel gears 109, the side rotating shafts 108, the inner transmission wheel 110 and the outer transmission wheel 111 to rotate. Through the outer transmission belt 112, the upper transmission wheel 114, the inner rotating sleeve 113 and the connecting block 117 are driven to rotate, thereby driving the two processing mechanisms to rotate. The inner transmission wheel 110 drives the lead screw wheel 120 and the lead screw 119 to rotate through the inner transmission belt 118. The lead screw 119 drives the internal thread seat 211 and the carriage 201 to slide inward along the slide rail 121, so as to realize the simultaneous inward sliding of the external thread cutter head 204 and the internal thread cutter head 205 while rotating. The external thread of one end of the steel pipe 4 is processed by the external thread cutter head 204, and the internal thread of the other end of the steel pipe 4 is processed by the internal thread cutter head 205. When the carriage 201 moves to the innermost side along the slide rail 121, the internal and external thread processing of the steel pipe 4 is completed. Subsequently, the inner motor 103 rotates in reverse, thereby driving the external thread cutter head 204 and the internal thread cutter head 205 to rotate outward in the opposite direction in a spiral manner, so that the external thread cutter head 204 and the internal thread cutter head 205 withdraw from both ends of the steel pipe 4.When processing the steel pipe 4, the upper pressing piece 307 presses the steel pipe 4 tightly against the lower support seat 301. At this time, the compression spring 316 is in a compressed state. After the internal and external threads of the steel pipe 4 are processed, the internal electric cylinder 308 extends, driving the internal lifting plate 309 to rise. The rising of the internal lifting plate 309 causes the internal chute bevel gear 310 to disengage from the side docking bevel gear 109, and the upper spring 315 is compressed. At this time, the side rotating shaft 108 stops rotating, and the rotating cylinder 207 and the sliding carriage 201 stop moving. The lower pressing guide rod 303 slides along the upper plate 102, and the upper spring 315 is compressed, thereby driving the lower pressing frame 304 and the lower pressing sleeve 305 to rise. First, the compression spring 316 rebounds. When the compression spring 316 is fully released, the lower pressing frame 304 starts to drive the upper pressing piece 307 to rise, causing the upper pressing piece 307 to disengage from the steel pipe 4. In the initial state, the lower support seat 301 blocks the steel pipe 4 in the feeding box 302. After the upper pressing piece 307 disengages from the steel pipe 4, the ejecting block 313 lifts the steel pipe 4 on the lower support seat 301, and the steel pipe 4 rolls out along the upper surface of the ejecting block 313. The pushing block 314 lifts the steel pipe 4 above it, and the steel pipe 4 rolls along the upper surface of the lower support seat 301 to the ejecting block 313 and is blocked by the ejecting block 313. Subsequently, the internal electric cylinder 308 contracts, driving the internal lifting plate 309, the ejecting block 313, and the pushing block 314 to descend. As the ejecting block 313 descends, the steel pipe 4 rolls into the groove of the lower support seat 301, and as the pushing block 314 descends, subsequently the lower pressing guide rod 303 descends, causing the upper pressing piece 307 to contact the steel pipe 4 on the groove of the lower support seat 301. Subsequently, the lower pressing guide rod 303 continues to descend, causing the compression spring 316 to be compressed, and the steel pipe 4 is pressed tightly against the lower support seat 301 by the upper pressing piece 307, and the internal chute bevel gear 310 re-engages with the side docking bevel gear 109, and the internal and external thread processing of the next steel pipe 4 begins.

[0041] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope of the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A 304 steel pipe internal and external thread cutting device, comprising a main frame mechanism, characterized in that: The main frame mechanism comprises a box body (101), an upper plate (102) is fixedly mounted on the box body (101), two processing mechanisms for cutting internal threads and external threads on the steel pipe (4) and a fixing mechanism for clamping and fixing the steel pipe (4) are arranged on the main frame mechanism, the processing mechanism comprises a slide frame (201), an internal thread seat (211) is fixedly mounted below the slide frame (201), and the fixing mechanism comprises a lower support seat (301), and the lower support seat (301) is fixedly mounted on the upper plate (102); The main frame mechanism comprises a vertical rotating shaft (105) rotatably mounted on the box body (101), a vertical rotating shaft slide groove (122) is arranged on the vertical rotating shaft (105), a slide rail (121) is fixedly mounted on the upper plate (102), the slide frame (201) is slidably mounted on the slide rail (121), a fixed rotating frame (116) is fixedly mounted on the upper plate (102), an inner rotating sleeve (113) is rotatably mounted on the fixed rotating frame (116), a slide groove rod (115) is slidably mounted in the inner rotating sleeve (113) through a slide groove, and a connecting block (117) is fixedly mounted on the slide groove rod (115); The fixing mechanism comprises an inner lifting plate (309), an inner groove bevel gear (310) is rotatably mounted on the inner lifting plate (309), the inner groove bevel gear (310) slides in the vertical shaft groove (122), a spring sheet (311) is rotatably mounted on the inner groove bevel gear (310), and a return spring (317) is provided between the spring sheet (311) and the upper plate (102).

2. A 304 steel pipe internal and external thread cutting device according to claim 1, characterized in that: The main frame mechanism also includes an inner motor (103) fixedly mounted in the box body (101), a motor bevel gear (104) fixedly mounted on the motor shaft of the inner motor (103), an axis frame (107) fixedly mounted in the box body (101), two side rotating shafts (108) rotatably mounted on the axis frame (107), side docking bevel gears (109), inner transmission wheels (110) and outer transmission wheels (111) fixedly mounted on the side rotating shafts (108), the side docking bevel gears (109) meshing with the inner slide groove bevel gear (310), and a lower bevel gear (106) fixedly mounted on the vertical rotating shaft (105), the lower bevel gear (106) meshing with the motor bevel gear (104).

3. A 304 steel pipe internal and external thread cutting device according to claim 2, characterized in that: An upper transmission wheel (114) is fixedly mounted on the inner rotating sleeve (113), an outer transmission belt (112) is wound around the upper transmission wheel (114) and the outer transmission wheel (111), a screw rod (119) is rotatably mounted below the upper plate (102), a screw rod wheel (120) is fixedly mounted on the screw rod (119), an inner transmission belt (118) is wound around the screw rod wheel (120) and the inner transmission wheel (110), and a threaded transmission is formed between the inner thread seat (211) and the side-jointed bevel gear (109).

4. A 304 steel pipe internal and external thread cutting device according to claim 1, characterized in that: The processing mechanism comprises a rotating seat (202) fixedly mounted on a slide (201), a rotating cylinder (207) rotatably mounted in the rotating seat (202), a connecting disk (210) fixedly mounted on the rotating cylinder (207), and the connecting disk (210) and the connecting block (117) fixedly mounted.

5. A 304 steel pipe internal and external thread cutting device according to claim 4, characterized in that: Three clamping blocks (203) are slidably mounted on the rotating cylinder (207), a rotating toothed disc (206) is rotatably mounted inside the rotating cylinder (207), a spiral linear track (212) is provided on the rotating toothed disc (206), the clamping blocks (203) slide along the track of the spiral linear track (212), three hexagon socket heads (209) are rotatably mounted on the rotating cylinder (207), an adjusting bevel gear (208) is fixedly mounted on the hexagon socket head (209), and the adjusting bevel gear (208) is meshed with the rotating toothed disc (206).

6. A 304 steel pipe internal and external thread cutting device according to claim 5, characterized in that: An external thread cutter head (204) is clamped between the three clamping blocks (203) of the fixing mechanism for machining external threads, and an internal thread cutter head (205) is clamped between the three clamping blocks (203) of the fixing mechanism for machining internal threads.

7. The device for cutting internal and external threads of 304 steel pipe according to claim 1, characterized in that: The fixing mechanism further comprises a downward pressing guide rod (303) slidably mounted on the upper plate (102), an inner lifting plate (309) being fixedly mounted on the downward pressing guide rod (303), an inner electric cylinder (308) being fixedly mounted in the box body (101), an output end of the inner electric cylinder (308) being fixedly mounted on the inner lifting plate (309), an upper spring (315) being arranged between the inner lifting plate (309) and the upper plate (102), a downward pressing frame (304) being fixedly mounted on the downward pressing guide rod (303), two downward pressing sleeves (305) being fixedly mounted on the downward pressing frame (304), an inner sliding rod (306) being slidably mounted in the downward pressing sleeve (305), a clamping spring (316) being arranged between the inner sliding rod (306) and the downward pressing sleeve (305), and an upper pressing sheet (307) being fixedly mounted on the inner sliding rod (306).

8. A 304 steel pipe internal and external thread cutting device according to claim 7, characterized in that: A material discharge box (302) is fixedly mounted on the upper plate (102), a plurality of steel pipes (4) are placed in the material discharge box (302), a slope is arranged in the material discharge box (302), an inner ejector rod (312) is fixedly mounted on the inner lifting plate (309), an ejection block (313) and a push-in block (314) are fixedly mounted on the inner ejector rod (312), the ejection block (313) and the push-in block (314) are slidably mounted on the lower support seat (301), and the upper surface of the push-in block (314) is an inclined surface.

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