304 steel pipe inner and outer thread cutting device

Abstract

The application discloses a 304 steel pipe inner and outer thread cutting device and belongs to the thread cutting technical field. The device comprises a main frame mechanism, two machining mechanisms for cutting the inner and outer 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 main frame mechanism can drive the two machining mechanisms to rotate while sliding inwards simultaneously, the outer thread cutter head and the inner thread cutter head can process the two ends of the 304 steel pipe simultaneously, the inner and outer thread processing of one 304 steel pipe only needs one clamping, and the processing efficiency is high. The 304 steel pipe is clamped through the grooves of the upper pressing piece and the lower supporting seat, the 304 steel pipe is stably clamped during the inner and outer thread processing, the 304 steel pipe that is processed is automatically pushed out by the ejector block when the upper pressing piece rises, the next 304 steel pipe to be processed is pushed to the lower side of the upper pressing piece through the push-in block, automatic feeding and discharging are realized, the degree of automation is high, and the continuity is good.

Description

Technical Field

[0001] The invention relates to the technical field of thread cutting, in particular to a device for cutting internal and external threads of a 304 steel pipe. Background Art

[0002] 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 requirements for corrosion resistance. 304 stainless steel itself is an austenitic stainless steel, containing 18% chromium and 8% nickel, which makes 304 steel pipe have good corrosion resistance, excellent mechanical properties and good processability. The internal and external thread cutting device of 304 steel pipe is mainly used to process threads on the inner and outer surfaces of 304 stainless steel pipe. This type of equipment is mainly used to manufacture stainless steel pipe joints, valve interfaces and other structures, 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 internal and external thread cutting device of steel pipes in the existing technology is usually unable to process the internal and external threads of 304 steel pipes at the same time, and needs to be clamped separately, which is inconvenient to use and has a poor degree of automation. Summary of the Invention

[0003] In response to the above technical problems, the technical solution adopted by the present invention is as follows: a device for cutting internal and external threads of a 304 steel pipe, comprising a main frame mechanism, the main frame mechanism comprising a box body, an upper plate fixedly mounted on the box body, the main frame mechanism being provided with 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, the processing mechanism comprising a slide frame, an internal thread seat fixedly mounted below the slide frame, the fixing mechanism comprising a lower support seat, and the lower support seat fixedly mounted on the upper plate;

[0004] The main frame mechanism includes a vertical rotating shaft rotatably mounted on the box body, a vertical shaft slide groove is provided on the vertical rotating shaft, a slide rail is fixedly mounted on the upper plate, the slide is slidably mounted on the slide rail, a fixed rotating frame is fixedly mounted on the upper plate, an inner rotating sleeve is rotatably mounted on the fixed rotating frame, a slide rod is slidably mounted in the inner rotating sleeve through the slide groove, and a connecting block is fixedly mounted on the slide rod;

[0005] The fixing mechanism includes an inner lifting plate, on which an inner groove bevel gear is rotatably mounted. The inner groove bevel gear slides in the vertical shaft groove. A spring sheet is rotatably mounted on the inner groove bevel gear, and a return spring is provided between the spring sheet and the upper plate.

[0006] Furthermore, the main frame mechanism also 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, a shaft frame is fixedly installed in the box body, two side rotating shafts are rotatably installed on the shaft frame, side docking bevel gears, inner transmission wheels and outer transmission wheels are fixedly installed on the side rotating shafts, the side docking bevel gears are meshed with the inner slide groove bevel gears, and a lower bevel gear is fixedly installed on the vertical rotating shaft, and the lower bevel gear is meshed with the motor bevel gear.

[0007] 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 thread seat and the side-jointed bevel gear form a threaded transmission.

[0008] The inner motor drives the motor bevel gear to rotate, driving the lower bevel gear, the vertical rotating shaft and the inner slot bevel gear to rotate, thereby driving the side connecting bevel gear, the side rotating 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 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 rod to rotate through the inner transmission belt, and the screw rod 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 to rotate and slide inward at the same time, and the external thread processing of one end of the steel pipe is completed by the external thread cutter head, and the internal thread processing of the other end of the steel pipe is completed by the internal thread cutter head.

[0009] 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 to the connecting block.

[0010] Furthermore, three clamping blocks are slidably installed on the rotating cylinder, a rotating gear disc is rotatably installed in the rotating cylinder, a vortex linear track is provided on the rotating gear disc, the clamping blocks slide along the track of the vortex linear track, three hexagonal heads are rotatably installed on the rotating cylinder, an adjusting bevel gear is fixedly installed on the hexagonal head, and the adjusting bevel gear is engaged with the rotating gear disc.

[0011] 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.

[0012] 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 disk to rotate, and driving the three clamping blocks to move inward at the same time through the vortex linear rail, so that the clamping blocks can clamp the external thread cutter head and the internal thread cutter head. 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. Similarly, the internal thread cutter head is driven to rotate. When the slide and the rotating seat slide inward along the slide rail, the slide groove rod slides along the inner rotating sleeve.

[0013] Furthermore, the fixing mechanism also includes a downward pressure guide rod slidably mounted on the upper plate, an inner lifting plate is fixedly mounted on the downward pressure guide rod, an inner electric cylinder is fixedly mounted in the box body, an output end of the inner electric cylinder is fixedly mounted on the inner lifting plate, an upper spring is arranged between the inner lifting plate and the upper plate, a downward pressure frame is fixedly mounted on the downward pressure guide rod, two downward pressure sleeves are fixedly mounted on the downward pressure frame, an inner sliding rod is slidably mounted in the downward pressure sleeve, a compression spring is arranged between the inner sliding rod and the downward pressure sleeve, and an upper pressure plate is fixedly mounted on the inner sliding rod.

[0014] Furthermore, a discharge box is fixedly installed on the upper plate, a number of steel pipes are placed in the discharge box, a slope is provided in the discharge box, an inner push rod is fixedly installed on the inner lifting plate, an ejection block and a push-in block are fixedly installed on the inner push rod, the ejection block and the push-in block are slidably installed with the lower support seat, and the upper surface of the push-in block is a slope.

[0015] When the steel pipe is being processed, the upper pressing piece presses the steel pipe against the lower supporting seat. At this time, the compression spring is in a compressed state. When the inner and outer 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 slide groove bevel gear to disengage from the side docking bevel gear, and the upper spring is compressed. At this time, the side shaft stops rotating, the rotating cylinder and the slide stop moving, and the lower pressing guide rod slides along the upper plate. The upper spring is compressed, thereby driving the lower pressing frame and the lower pressing sleeve to rise. First, the compression spring rebounds. When the compression spring is fully released, the lower pressing frame begins to rise with the upper pressing piece, so that the upper pressing piece is separated from the steel pipe. In the initial state, the upper and lower supporting seats block the steel pipe in the discharge box. When the upper pressing piece is separated from the steel pipe After separation, the ejector block lifts the steel pipe on the lower support seat, the steel pipe rolls out along the upper surface of the ejector block, the push-in block lifts the steel pipe above it, the steel pipe rolls along the upper surface of the lower support seat to the ejector block, and is blocked by the ejector block, then the inner electric cylinder contracts, driving the inner lifting plate, ejector block and push-in block to descend, the ejector block descends, the steel pipe rolls into the groove of the lower support seat, and the push-in block descends, then the lower pressure guide rod descends, so that the upper pressing piece contacts the steel pipe on the groove of the lower support seat, then the lower pressure guide rod continues to descend, so that the compression spring is compressed, and the steel pipe is pressed against the lower support seat through the upper pressing piece, and the inner slide groove bevel gear re-engages with the side docking bevel gear, and the inner and outer threads of the next steel pipe are started.

[0016] Compared with the prior art, the present invention has the following advantages: (1) the main frame mechanism provided by 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 threads of a 304 steel pipe only need to be clamped once, and the processing efficiency is high; (2) when the fixing mechanism provided by 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 by 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

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the overall structure of the present invention (interior).

[0019] Figure 3 Schematic diagram of the main frame structure of the present invention Figure 1 .

[0020] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0021] Figure 5 Schematic diagram of the main frame structure of the present invention Figure 2 .

[0022] Figure 6 for Figure 5 A partial enlarged schematic diagram of point B in the middle.

[0023] Figure 7 Schematic diagram of the processing mechanism structure of the present invention Figure 1 .

[0024] Figure 8 Schematic diagram of the processing mechanism structure of the present invention Figure 2 .

[0025] Figure 9 Schematic diagram of the processing mechanism structure of the present invention Figure 3 .

[0026] Figure 10 Schematic diagram of the fixing mechanism structure of the present invention Figure 1 .

[0027] Figure 11 Schematic diagram of the fixing mechanism structure of the present invention Figure 2 .

[0028] Figure 12 Schematic diagram of the fixing mechanism structure of the present invention Figure 3 .

[0029] Reference numerals: 101 - housing; 102 - upper plate; 103 - inner motor; 104 - motor bevel gear; 105 - vertical shaft; 106 - lower bevel gear; 107 - shaft frame; 108 - side shaft; 109 - side butt bevel gear; 110 - inner transmission wheel; 111 - outer transmission wheel; 112 - outer transmission belt; 113 - inner rotating sleeve; 114 - upper transmission wheel; 115 - slide rod; 116 - fixed rotating frame; 117 - connecting block; 118 - inner transmission belt; 119 - screw rod; 120 - screw rod wheel; 121 - slide rail; 122 - vertical shaft slide; 201 - slide; 202 - rotating seat; 203 - clamping block; 204 - external thread cutter head; 205-internal thread cutter head; 206-rotating gear disc; 207-rotating cylinder; 208-adjusting bevel gear; 209-hexagonal head; 210-connecting disc; 211-internal thread seat; 212-vortex linear rail; 301-lower support seat; 302-discharge box; 303-downward pressure guide rod; 304-downward pressure frame; 305-downward pressure sleeve; 306-inner slide rod; 307-upper pressure plate; 308-inner electric cylinder; 309-inner lifting plate; 310-inner slide groove bevel gear; 311-spring sheet; 312-inner ejector rod; 313-ejection block; 314-push-in block; 315-upper spring; 316-compression spring; 317-reset spring; 4-steel pipe. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0031] Example: Reference Figures 1-12 A device for cutting internal and external threads of a 304 steel pipe includes a main frame mechanism, the main frame mechanism includes a box body 101, an upper plate 102 is fixedly mounted on the box body 101, the main frame mechanism is provided with two processing mechanisms for cutting internal and external threads of a steel pipe 4 respectively, and a fixing mechanism for clamping and fixing the steel pipe 4, the processing mechanism includes a slide 201, an internal thread seat 211 is fixedly mounted below the slide 201, and the fixing mechanism includes a lower support seat 301, and the lower support seat 301 is fixedly mounted on the upper plate 102;

[0032] The main frame mechanism includes a vertical rotating shaft 105 rotatably mounted on the box body 101, a vertical rotating shaft 105 is provided with a vertical shaft slide 122, a slide rail 121 is fixedly mounted on the upper plate 102, and the slide 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 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 rod 115;

[0033] The fixing mechanism includes an inner lifting plate 309 , on which an inner groove bevel gear 310 is rotatably mounted. 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 .

[0034] like Figure 3-Figure 6 As shown, the main frame mechanism also includes an inner motor 103 fixedly mounted in the box body 101, a motor bevel gear 104 is fixedly mounted on the motor shaft of the inner motor 103, a shaft frame 107 is fixedly mounted in the box body 101, two side rotating shafts 108 are rotatably mounted on the shaft frame 107, side docking bevel gears 109, inner transmission wheels 110 and outer transmission wheels 111 are fixedly mounted on the side rotating shafts 108, the side docking bevel gears 109 are meshed with the inner slide groove bevel gear 310, and a lower bevel gear 106 is fixedly mounted on the vertical rotating shaft 105, and the lower bevel gear 106 is meshed with the motor bevel gear 104.

[0035] like Figure 3-Figure 6 As shown, an upper transmission wheel 114 is fixedly mounted on the inner rotating sleeve 113, and 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, and 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 the internal threaded seat 211 and the side-jointed bevel gear 109 form a threaded transmission.

[0036] When the steel pipe 4 is clamped, the inner groove bevel gear 310 is engaged with the two side docking bevel gears 109, and the inner motor 103 drives the motor bevel gear 104 to rotate, driving the lower bevel gear 106, the vertical shaft 105 and the inner groove bevel gear 310 to rotate, thereby driving the side docking bevel gear 109, the side shaft 108, the inner transmission wheel 110 and the outer transmission wheel 111 to rotate, and the upper transmission wheel 114, the inner rotating sleeve 113 and the connecting block 117 are driven to rotate through the outer transmission belt 112, thereby driving the two processing mechanisms to rotate, and the inner transmission wheel 110 drives the screw wheel 120 and the screw 119 to rotate through the inner transmission belt 118, and the screw 119 drives the internal thread seat 211 and the slide 201 slide inward along the slide rail 121, thereby realizing the external thread cutter head 204 and the internal thread cutter head 205 rotating and sliding inward at the same time, and the external thread is processed on one end of the steel pipe 4 by the external thread cutter head 204, and the internal thread is processed on the other end of the steel pipe 4 by the internal thread cutter head 205. When the slide 201 moves to the innermost side along the slide rail 121, the internal and external thread processing of the steel pipe 4 is completed, and then the internal 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, so that the external thread cutter head 204 and the internal thread cutter head 205 exit the two ends of the steel pipe 4.

[0037] like Figure 7-Figure 9 As shown, the processing mechanism includes a rotating base 202 fixedly mounted on a slide 201 , a rotating cylinder 207 rotatably mounted in the rotating base 202 , a connecting disk 210 fixedly mounted on the rotating cylinder 207 , and the connecting disk 210 is fixedly mounted to the connecting block 117 .

[0038] like Figure 7-Figure 9 As shown, three clamping blocks 203 are slidably mounted on the rotating cylinder 207, a rotating gear disc 206 is rotatably mounted inside the rotating cylinder 207, a spiral linear track 212 is provided on the rotating gear disc 206, the clamping blocks 203 slide along the track of the spiral linear track 212, three hexagonal sockets 209 are rotatably mounted on the rotating cylinder 207, an adjusting bevel gear 208 is fixedly mounted on the hexagonal sockets 209, and the adjusting bevel gear 208 is engaged with the rotating gear disc 206.

[0039] like Figure 7-Figure 9 As shown, 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.

[0040] 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, and the internal hexagonal head 209 is screwed with the internal hexagonal wrench to drive the adjusting bevel gear 208 to rotate, thereby driving the rotating gear plate 206 to rotate, and the three clamping blocks 203 are driven to move inward at the same time through the vortex linear rail 212, so that the clamping blocks 203 clamp the external thread cutter head 204 and the internal thread cutter head 205. When the inner rotating sleeve 113 rotates, the connecting plate 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 slide 201 and the rotating seat 202 slide inward along the slide rail 121, the slide groove rod 115 slides along the inner rotating sleeve 113.

[0041] like Figure 10-12 As shown, the fixing mechanism also 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 in the box body 101, the output end of the inner electric cylinder 308 is fixedly mounted on 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 in the downward pressure sleeve 305, a compression spring 316 is arranged between the inner slide rod 306 and the downward pressure sleeve 305, and an upper pressure plate 307 is fixedly mounted on the inner slide rod 306.

[0042] like Figure 10-12 As shown, a discharge box 302 is fixedly mounted on the upper plate 102, a plurality of steel pipes 4 are placed in the discharge box 302, a slope is provided in the 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 with the lower support seat 301, and the upper surface of the push-in block 314 is an inclined surface.

[0043] When the steel pipe 4 is being processed, the upper pressing piece 307 presses the steel pipe 4 against the lower support seat 301. At this time, the pressing spring 316 is in a compressed state. When the inner and outer threads of the steel pipe 4 are processed, the inner electric cylinder 308 extends, driving the inner lifting plate 309 to rise. The inner lifting plate 309 rises so that the inner groove bevel gear 310 is disengaged from the side docking bevel gear 109. The upper spring 315 is compressed. At this time, the side shaft 108 stops rotating, and the rotating cylinder 207 and the slide 2 01 stops moving, the downward pressure guide rod 303 slides along the upper plate 102, the upper spring 315 is compressed, thereby driving the lower pressure frame 304 and the lower pressure sleeve 305 to rise, first the compression spring 316 rebounds, when the compression spring 316 is fully released, the lower pressure frame 304 begins to rise with the upper pressure plate 307, so that the upper pressure plate 307 is separated from the steel pipe 4, and in the initial state, the lower support seat 301 blocks the steel pipe 4 in the discharge box 302. When the upper pressure plate 307 is separated from the steel pipe After the detachment, the ejection block 313 lifts up the steel pipe 4 on the lower support seat 301, and the steel pipe 4 rolls out along the upper surface of the ejection block 313. The push-in block 314 lifts up the steel pipe 4 above it, and the steel pipe 4 rolls along the upper surface of the lower support seat 301 to the ejection block 313 and is blocked by the ejection block 313. Then the inner electric cylinder 308 contracts, driving the inner lifting plate 309, the ejection block 313 and the push-in block 314 to descend. The ejection block 313 descends, and the steel pipe 4 rolls to the lower support seat 301. The groove of the support seat 301 is pushed into the push block 314, and then the downward pressure guide rod 303 is lowered, so that the upper pressure plate 307 contacts the steel pipe 4 on the groove of the lower support seat 301, and then the downward pressure guide rod 303 continues to descend, so that the clamping spring 316 is compressed, and the steel pipe 4 is pressed against the lower support seat 301 through the upper pressure plate 307, and the inner groove bevel gear 310 is re-engaged with the side docking bevel gear 109, and the internal and external thread processing of the next steel pipe 4 is started.

[0044] The working principle of the 304 steel pipe internal and external thread cutting device disclosed in 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, and the internal hexagonal head 209 is screwed by the internal hexagonal wrench, thereby driving the adjusting bevel gear 208 to rotate, thereby driving the rotating gear plate 206 to rotate, and driving the three clamping blocks 203 to move inward at the same time through the vortex linear rail 212, 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 plate 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, and similarly drive the internal thread cutter head 205 to rotate. When the slide 201 and the rotating seat 202 slide inward along the slide rail 121, the slide groove rod 115 slides along the inner rotating sleeve 113. When the steel pipe 4 is clamped, the inner groove bevel gear 310 is engaged with the two side docking bevel gears 109, and the inner motor 103 drives the motor bevel gear 104 to rotate, driving the lower bevel gear 106, the vertical shaft 105 and the inner groove bevel gear 310 to rotate, thereby driving the side docking bevel gear 109, the side shaft 108, the inner transmission wheel 110 and the outer transmission wheel 111 to rotate, and the upper transmission wheel 114, the inner rotating sleeve 113 and the connecting block 117 are driven to rotate through the outer transmission belt 112, thereby driving the two processing mechanisms to rotate, and the inner transmission wheel 110 drives the screw wheel 120 and the screw 119 to rotate through the inner transmission belt 118, and the screw 119 drives the internal thread seat 211 and the slide 201 slide inward along the slide rail 121, thereby realizing the external thread cutter head 204 and the internal thread cutter head 205 rotating and sliding inward at the same time, and the external thread is processed on one end of the steel pipe 4 by the external thread cutter head 204, and the internal thread is processed on the other end of the steel pipe 4 by the internal thread cutter head 205. When the slide 201 moves to the innermost side along the slide rail 121, the internal and external thread processing of the steel pipe 4 is completed, and then the internal 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, so that the external thread cutter head 204 and the internal thread cutter head 205 exit the two ends of the steel pipe 4.When the steel pipe 4 is being processed, the upper pressing piece 307 presses the steel pipe 4 against the lower support seat 301. At this time, the pressing spring 316 is in a compressed state. When the inner and outer threads of the steel pipe 4 are processed, the inner electric cylinder 308 extends, driving the inner lifting plate 309 to rise. The inner lifting plate 309 rises so that the inner groove bevel gear 310 is disengaged from the side docking bevel gear 109. The upper spring 315 is compressed. At this time, the side shaft 108 stops rotating, and the rotating cylinder 207 and the slide 2 01 stops moving, the downward pressure guide rod 303 slides along the upper plate 102, the upper spring 315 is compressed, thereby driving the lower pressure frame 304 and the lower pressure sleeve 305 to rise, first the compression spring 316 rebounds, when the compression spring 316 is fully released, the lower pressure frame 304 begins to rise with the upper pressure plate 307, so that the upper pressure plate 307 is separated from the steel pipe 4, and in the initial state, the lower support seat 301 blocks the steel pipe 4 in the discharge box 302. When the upper pressure plate 307 is separated from the steel pipe After the detachment, the ejection block 313 lifts up the steel pipe 4 on the lower support seat 301, and the steel pipe 4 rolls out along the upper surface of the ejection block 313. The push-in block 314 lifts up the steel pipe 4 above it, and the steel pipe 4 rolls along the upper surface of the lower support seat 301 to the ejection block 313 and is blocked by the ejection block 313. Then the inner electric cylinder 308 contracts, driving the inner lifting plate 309, the ejection block 313 and the push-in block 314 to descend. The ejection block 313 descends, and the steel pipe 4 rolls to the lower support seat 301. The groove of the support seat 301 is pushed into the push block 314, and then the downward pressure guide rod 303 is lowered, so that the upper pressure plate 307 contacts the steel pipe 4 on the groove of the lower support seat 301, and then the downward pressure guide rod 303 continues to descend, so that the clamping spring 316 is compressed, and the steel pipe 4 is pressed against the lower support seat 301 through the upper pressure plate 307, and the inner groove bevel gear 310 is re-engaged with the side docking bevel gear 109, and the internal and external thread processing of the next steel pipe 4 is started.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention within the technical scope of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A device for cutting internal and external threads of 304 steel pipes, 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), and 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 provided on the main frame mechanism, the processing mechanism comprises a slide (201), an internal thread seat (211) is fixedly mounted below the slide (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 includes a vertical rotating shaft (105) rotatably mounted on the box body (101), a vertical rotating shaft slide (122) is provided on the vertical rotating shaft (105), a slide rail (121) is fixedly mounted on the upper plate (102), the slide (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 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 rod (115); The fixing mechanism includes 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); 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), a shaft frame (107) fixedly mounted in the box body (101), two side rotating shafts (108) rotatably mounted on the shaft frame (107), side docking bevel gears (109), an inner transmission wheel (110) and an outer transmission wheel (111) fixedly mounted on the side rotating shafts (108), the side docking bevel gears (109) meshing with the inner slide groove bevel gear (310), a lower bevel gear (106) fixedly mounted on the vertical rotating shaft (105), and the lower bevel gear (106) meshing with the motor bevel gear (104); 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 an internal threaded seat (211) and a side-jointed bevel gear (109) form a threaded transmission; 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; The upper transmission wheel (114), the inner rotating sleeve (113) and the connecting block (117) are driven to rotate by the outer transmission belt (112), thereby driving the two processing mechanisms to rotate.

2. The device for cutting internal and external threads of a 304 steel pipe according to claim 1, characterized in that: Three clamping blocks (203) are slidably mounted on the rotating cylinder (207), a rotating toothed disc (206) is rotatably mounted in 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 hexagonal sockets (209) are rotatably mounted on the rotating cylinder (207), an adjusting bevel gear (208) is fixedly mounted on the hexagonal sockets (209), and the adjusting bevel gear (208) is meshed with the rotating toothed disc (206).

3. The device for cutting internal and external threads of a 304 steel pipe according to claim 2, characterized in that: 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.

4. The device for cutting internal and external threads of a 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) fixedly mounted on the downward pressing guide rod (303), an inner electric cylinder (308) fixedly mounted in the box body (101), an output end of the inner electric cylinder (308) fixedly mounted on the inner lifting plate (309), an upper spring (315) provided between the inner lifting plate (309) and the upper plate (102), a downward pressing frame (304) fixedly mounted on the downward pressing guide rod (303), two downward pressing sleeves (305) fixedly mounted on the downward pressing frame (304), an inner sliding rod (306) slidably mounted in the downward pressing sleeve (305), a compression spring (316) provided between the inner sliding rod (306) and the downward pressing sleeve (305), and an upper pressing plate (307) fixedly mounted on the inner sliding rod (306).

5. The device for cutting internal and external threads of 304 steel pipe according to claim 4, characterized in that: A discharge box (302) is fixedly mounted on the upper plate (102), a plurality of steel pipes (4) are placed in the discharge box (302), a slope is provided in the 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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