A threading machine for pipe threading

Abstract

This utility model discloses a threading machine for pipe threading, comprising: a threading machine body, a cavity on the right side of the machine body, a filter screen fixed in the middle of the cavity, a water pump fixedly installed on the left outer wall of the cavity, the water pump's suction end communicating with the cavity, and a nozzle connected to the water pump's discharge end via a pipe; an oil tank installed inside the threading machine body, with an oil pump installed on one side of the oil tank. The cutter head structure uses a worm gear jack to drive a push-pull assembly, which in turn controls the synchronous radial movement of four sliders via a lever, achieving automatic opening and closing adjustment of the die. This eliminates the need for manual die replacement, significantly improving processing efficiency and reducing operational intensity. Furthermore, the motor drives the reducer and hollow spindle to rotate via a synchronous wheel mechanism, ensuring high-speed and stable operation of the cutter head mechanism and guaranteeing thread processing quality. The overall structure is rationally designed, easy to operate, and highly automated, suitable for thread processing of various pipe diameters, and has wide applicability and practicality.

Description

Technical Field

[0001] This utility model relates to the field of threading machine technology, specifically to a threading machine for pipe threading. Background Technology

[0002] An electric threading machine is an electric tool equipped with forward and reverse rotation devices for processing external threads on pipes. It is also known as an electric pipe cutting and threading machine, thread twisting machine, or pipe threading machine. It makes pipe thread processing during pipeline installation easier and faster, reducing the labor intensity of pipeline installation workers.

[0003] Current threading machine coolant treatment and circulation systems often have shortcomings. Metal shavings and impurities generated during processing can easily mix with the coolant, which not only affects the cooling effect but may also cause nozzle blockage and pump wear, reducing system reliability. At the same time, the oil pump system used for the clamping structure is often located outside the machine, so when cooling, splashed coolant will spray onto the oil pump system, affecting its service life. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a threading machine for pipe threading to solve the problems mentioned in the background art.

[0005] A threading machine for pipe threading, comprising:

[0006] The threading machine body has a cavity on the right side, a filter screen is fixed in the middle of the cavity, a water pump is fixedly installed on the left outer wall of the cavity, the water pump's pumping end is connected to the cavity, and the water pump's draining end is connected to a nozzle through a pipe. An oil tank is installed inside the threading machine body, and an oil pump is installed on one side of the oil tank.

[0007] A clamping structure is installed on the upper right side of the threading machine body, and the oil pump is connected to the clamping structure;

[0008] A cutter head structure is installed in the middle of the inside of the threading machine body. The nozzle faces the cutter head structure. The cutter head structure includes a worm gear jack fixed to the threading machine body, a reducer fixedly installed at the right end of the worm gear jack, a hollow main shaft fixedly installed at the output end of the reducer, and a cutter head mechanism concentrically installed at the right end of the hollow main shaft.

[0009] A motor is fixedly installed inside the lower end of the threading machine body, and the oil tank is located above the motor;

[0010] And a synchronous pulley mechanism installed between the motor output end and the reducer input end.

[0011] Preferably, a power distribution box is installed at the left end of the threading machine body, casters are installed at the four corners of the lower end of the threading machine body, and a touch screen is installed at the upper end of the threading machine body.

[0012] Preferably, the clamping structure includes a pushing mechanism fixed to the upper end of the threading machine body, a clamping mechanism fixed to the upper end of the pushing mechanism, and a baffle plate mechanism located on the left side of the pushing mechanism and installed on the upper end of the threading machine body. The pushing mechanism includes a guide rail slider assembly, a pushing platform, an operating rod, a convex rod, and a recessed seat. There are two sets of the guide rail slider assembly, which are respectively fixed to the front and rear sides of the upper end of the threading machine body. The pushing platform is fixed between the upper ends of the sliders of the guide rail slider assembly. The recessed seat is fixed to the front side of the lower end of the pushing platform. The convex rod is movably installed in the recessed seat. The operating rod is fixed to the lower part of the convex rod by a shaft. The operating rod is located in front of the threading machine body.

[0013] Preferably, the clamping mechanism includes a guard plate, a second guide rail slider assembly, a hydraulic cylinder, grippers, and a gear and rack assembly. The guard plate is fixed on both sides of the outer periphery of the upper end of the push platform. There are two sets of the second guide rail slider assembly, which are symmetrically fixed on the left and right sides of the upper end of the push platform. There is a pair of grippers, which are fixed one-to-one on the upper end of the slider of the second guide rail slider assembly. There is a pair of hydraulic cylinders, which are symmetrically fixed on the front and rear sides between the guard plates. The piston rod end of the hydraulic cylinder is fixed to the gripper. The gear and rack assembly is installed in the middle of the upper end of the push platform. The gear and rack assembly is connected to the slider of the second guide rail slider assembly and drives the sliders of the two sets of second guide rail slider assemblies to move in opposite directions.

[0014] Preferably, the tube baffle mechanism includes a rotating seat, a spiral shaft, and a tube baffle. The rotating seat is fixed to the threading machine body, the right side of the spiral shaft is connected to the guard plate bearing, the left side of the spiral shaft is helically engaged with the rotating seat, and the tube baffle is fixed outside the spiral shaft.

[0015] Preferably, the hollow spindle is connected to the reducer housing via bearings. The cutter head mechanism includes a die holder, a push-pull assembly, a lever, a slider, and dies. The right side of the hollow spindle is fixedly connected to the left side of the die holder. The push-pull assembly movably passes through the left side of the die holder. The left side of the push-pull assembly extends through the interior of the hollow spindle and is connected to the lead screw of the worm gear jack via bearings. There are four sliders, which are slidably connected to the right side of the die holder. There are four dies, which are fixed to the sliders one by one with corresponding screws. An L-shaped lever is movably connected between the slider and the push-pull assembly. The center of the lever is rotatably connected to the interior of the die holder.

[0016] Preferably, the die holder includes a clamp seat and a slider seat. The left part of the clamp seat is fixed to the right part of the hollow spindle, and the slider seat is fixed to the right end of the clamp seat. The right end of the slider seat has grooves around its perimeter, and the sliders are slidably connected to the grooves one by one.

[0017] Preferably, the push-pull assembly includes a push-pull rod and a push-pull ring. The push-pull ring is located inside the clamp seat, the push-pull rod is fixed to the left end of the push-pull ring, the left part of the push-pull rod moves through the clamp seat and extends through the hollow main shaft, and the left part of the push-pull rod is connected to the lead screw of the worm gear jack through a bearing.

[0018] Preferably, both ends of the outer ring groove of the push-pull ring have inner ring grooves, the first end of the lever is movably embedded in the inner ring groove, the center of the lever is rotatably connected to the clamp seat, the left end of the slider has a movable groove, and the end of the lever is movably embedded in the movable groove.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. By setting a cavity with a filter screen on the right side of the threading machine body, in conjunction with a water pump and nozzle, effective filtration and circulating spraying of coolant are achieved, which significantly improves cooling efficiency and tool life, while reducing maintenance frequency. The built-in oil tank and oil pump work in conjunction with the oil cylinder of the clamping mechanism, thus the entire oil pump system is built-in, which improves service life.

[0021] 2. Through the clamping structure set at the upper part of the threading machine body, the entire clamping mechanism can be easily pushed along the threading machine body by the guide rail slider assembly and operating rod in the propulsion mechanism, which can adapt to the processing needs of pipes of different lengths. The hydraulic cylinder in the clamping mechanism drives the jaws and realizes the synchronous reverse movement of the jaws on both sides through the gear and rack assembly, thereby firmly clamping the pipe, preventing shaking during processing, and improving the accuracy of thread processing.

[0022] 3. The tube baffle mechanism can adjust the position of the tube baffle through the helical engagement of the rotating seat and the screw shaft, thereby axially positioning the tube and further ensuring processing stability;

[0023] 4. The cutter head structure adopts a worm gear jack to drive the push-pull assembly, which in turn controls the synchronous radial movement of four sliders via a lever, realizing automatic opening and closing adjustment of the die. This eliminates the need for manual die replacement, significantly improving processing efficiency and reducing operational intensity. Furthermore, the motor drives the reducer and hollow spindle to rotate through a synchronous wheel mechanism, ensuring high-speed and stable operation of the cutter head mechanism and guaranteeing thread processing quality. The overall structure is reasonably designed, easy to operate, and highly automated, making it suitable for thread processing of various pipe diameters and possessing wide applicability and practicality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0025] Figure 2 This is a schematic diagram of the internal structure of the threading machine of this utility model.

[0026] Figure 3This is a schematic diagram of the overall wire removal machine body of this utility model.

[0027] Figure 4 This is a left-side view of the clamping structure of this utility model.

[0028] Figure 5 This is a bottom view of the clamping structure of this utility model.

[0029] Figure 6 This is a schematic diagram of the clamping structure of this utility model after the protective plate has been removed.

[0030] Figure 7 This is a schematic diagram of the cutter head structure of this utility model.

[0031] Figure 8 This is a schematic diagram of the internal structure of the speed reducer of this utility model.

[0032] Figure 9 This is a schematic diagram of the cutter head structure of this utility model after removing the clamp seat and slider seat.

[0033] Figure 10 This is a schematic diagram of the left side of the push-pull ring of this utility model.

[0034] In the diagram: 1. Threading machine body; 11. Electrical control box; 12. Casters; 13. Touch screen; 14. Cavity; 15. Filter screen; 16. Water pump; 17. Nozzle; 18. Oil tank; 2. Clamping structure; 21. Pushing mechanism; 211. Guide rail slider assembly one; 212. Pushing platform; 213. Operating lever; 214. Protruding rod; 215. Recessed seat; 22. Clamping mechanism; 221. Protective plate; 222. Guide rail slider assembly two; 223. Hydraulic cylinder; 22 4. Gripper; 225. Gear and rack assembly; 23. Baffle plate mechanism; 231. Rotary seat; 232. Helical shaft; 233. Baffle plate; 3. Cutter head structure; 31. Worm gear jack; 32. Reducer; 33. Cutter head mechanism; 331. Fixture seat; 332. Slider seat; 333. Push-pull rod; 334. Push-pull ring; 335. Lever; 336. Slider; 37. Die; 34. Hollow spindle; 4. Motor; 5. Synchronous pulley mechanism. Detailed Implementation

[0035] like Figures 1-3As shown, a threading machine for pipe threading includes a threading machine body 1, a clamping structure 2 installed on the upper right side of the threading machine body, a cutter head structure 3 installed in the middle inside the threading machine body 1, a motor 4 fixedly installed at the lower end inside the threading machine body 1, and a synchronous wheel mechanism 5 installed between the output end of the motor 4 and the input end of the reducer 32. The cutter head structure 3 includes a worm gear jack 31 fixed to the threading machine body 1, a reducer 32 fixedly installed at the right end of the worm gear jack 31, a hollow spindle 34 fixedly installed at the output end of the reducer 32, and a cutter head mechanism 33 concentrically installed at the right end of the hollow spindle 34. The motor 4 transmits power to the reducer 32 through the synchronous wheel mechanism 5, and then the output end of the reducer 32 drives the hollow spindle 34 to rotate.

[0036] like Figures 1-3 As shown, a cavity 14 is provided on the right side of the threading machine body 1. A filter screen 15 is fixed in the middle of the cavity 14. A water pump 16 is fixedly installed on the left outer wall of the cavity 14. The water pump 16's suction end is connected to the cavity 14, and the water pump 16's discharge end is connected to a nozzle 17 through a pipe. The nozzle 17 faces the cutter head structure 3. An oil tank 18 is installed inside the threading machine body 1. The oil tank 18 is located above the motor 4. An oil pump is installed on one side of the oil tank 18 and is connected to the clamping structure 2. A power distribution box 11 is installed on the left end of the threading machine body 1. Casters 12 are installed at the four corners of the lower end of the threading machine body 1. A touch screen is installed on the upper end of the threading machine body 1. 13. The threading machine body 1 provides overall rigid support, the power distribution box 11 integrates the electrical control system, the casters 12 facilitate on-site relocation, and the touch screen 13 enables the setting of processing parameters and status monitoring, providing a foundation for automated processing. By setting a cavity 14 with a filter screen 15 on the right side of the threading machine body 1, in conjunction with the water pump 16 and the nozzle 17, effective filtration and circulating spraying of coolant are achieved, significantly improving cooling efficiency and tool life, while reducing maintenance frequency. The built-in oil tank 18 and oil pump are used in conjunction with the clamping structure 2 to clamp the tube, thus embedding the entire oil pump system and improving its service life.

[0037] like Figures 1-6As shown, the clamping structure 2 includes a pushing mechanism 21 fixed to the upper end of the threading machine body 1, a clamping mechanism 22 fixed to the upper end of the pushing mechanism 21, and a baffle plate mechanism 23 located on the left side of the pushing mechanism 21 and installed on the upper end of the threading machine body 1. The pushing mechanism 21 includes a guide rail slider assembly 211, a pushing platform 212, an operating rod 213, a protruding rod 214, and a recessed seat 215. There are two sets of guide rail slider assemblies 211, which are respectively fixed to the front and rear sides of the upper end of the threading machine body 1. The pushing platform 212 is fixed to the upper end of the threading machine body 1. Between the upper ends of the slider of the guide rail slider assembly 211, the recess 215 is fixed to the front side of the lower end of the push table 212, the protruding rod 214 is movably installed in the recess 215, and the operating rod 213 is fixed to the lower part of the protruding rod 214 by a shaft. The operating rod 213 is located in front of the threading machine body 1. When the operator moves the operating rod 213, the push table 212 is pushed to slide along the guide rail by the lever action of the protruding rod 214 and the recess 215, so as to realize the forward and backward movement of the clamping mechanism 22 and adapt to the processing needs of pipes of different lengths.

[0038] like Figures 1-6 As shown, the clamping mechanism 22 includes a guard plate 221, a guide rail slider assembly 222, a hydraulic cylinder 223, grippers 224, and a gear and rack assembly 225. The guard plate 221 is fixed to both sides of the upper outer periphery of the push platform 212. There are two sets of guide rail slider assemblies 222, which are symmetrically fixed to the left and right sides of the upper end of the push platform 212. There is a pair of grippers 224, which are fixed to the upper end of the slider of the guide rail slider assembly 222. There is a pair of hydraulic cylinders 223, which are symmetrically fixed to the front and rear sides between the guard plates 221. The piston rod end of the hydraulic cylinder 223 is connected to the gripper 224. 24 is fixed. The gear and rack assembly 225 is installed in the middle of the upper end of the push table 212. The gear and rack assembly 225 is connected to the slider of the guide rail slider assembly 222 and drives the sliders of the two guide rail slider assemblies 222 to move in opposite directions. The oil in the oil tank 18 is supplied to the oil cylinder 223 of the clamping structure 22 by the oil pump to ensure its smooth operation. The oil cylinder 223 pushes one side of the clamp 224 to move. Through the gear and rack assembly 225, the two sides of the clamp 224 move in opposite directions synchronously to realize the automatic centering and clamping of the pipe and ensure the processing accuracy.

[0039] like Figures 1-6 As shown, the pipe baffle mechanism 23 includes a rotating seat 231, a spiral shaft 232, and a pipe baffle 233. The rotating seat 231 is fixed to the threading machine body 1. The right side of the spiral shaft 232 is connected to the bearing of the guard plate 221, and the left side of the spiral shaft 232 is screwed into the rotating seat 231. The pipe baffle 233 is fixed outside the spiral shaft 232. When the pushing mechanism 21 drives the clamping mechanism 22 to move, the spiral shaft 232 moves axially and rotates automatically through the spiral engagement with the rotating seat 231, thereby driving the pipe baffle 233 to adjust its angle and always remain perpendicular to the pipe axis, providing accurate axial positioning.

[0040] like Figures 1-10As shown, the hollow spindle 34 is connected to the housing of the reducer 32 via bearings. The cutter head mechanism 33 includes a die holder, a push-pull assembly, a lever 335, a slider 336, and a die 337. The right side of the hollow spindle 34 is fixedly connected to the left side of the die holder. The push-pull assembly movably passes through the left side of the die holder. The left side of the push-pull assembly extends through the interior of the hollow spindle 34 and is connected to the lead screw of the worm gear jack 31 via bearings. There are four sliders 336, which are slidably connected to the right side of the die holder. There are four dies 337. Each block is fixed to the slider 336 with a corresponding screw. An L-shaped lever 335 is movably connected between the slider 336 and the push-pull assembly. The center of the lever 335 is rotatably connected to the inside of the die holder. The die holder includes a clamp seat 331 and a slider seat 332. The left part of the clamp seat 331 is fixed to the right part of the hollow main shaft 34. The slider seat 332 is fixed to the right end of the clamp seat 331. Slide grooves are formed around the right end of the slider seat 332, and the sliders 336 are slidably connected to the inside of these grooves. The push-pull assembly includes a push-pull rod 3... 33 and push-pull ring 334, push-pull ring 334 is located inside clamp seat 331, push-pull rod 333 is fixed to the left end of push-pull ring 334, the left part of push-pull rod 333 moves through clamp seat 331 and extends through hollow main shaft 34, the left part of push-pull rod 333 is connected to the lead screw of worm gear jack 31 through bearing, the outer ring groove of push-pull ring 334 has inner ring grooves at both ends, the head of lever 335 is movably embedded in the inner ring groove, the center of lever 335 is rotatably connected to clamp seat 331, slider The left end of 336 has a movable groove, and the end of the lever 335 is movably embedded in the movable groove. The motor 4 transmits power to the reducer 32 through the synchronous belt pulley mechanism 5. After reduction, it drives the hollow spindle 34 to rotate, providing the main cutting motion for the cutter head. The worm gear lift 31 drives the push-pull rod 333 to move axially, which drives the push-pull ring 334 to move. Through the lever action of the lever 335, it pushes the four sliders 336 to move radially synchronously, realizing the opening and closing of the die 337, which can adapt to the processing needs of different pipe diameters.

[0041] Working Principle: The operator first sets the key parameters for this processing through the touch screen 13 on the top of the machine body, mainly including the outer diameter of the pipe and the required thread specifications (such as pitch and tooth profile). After receiving the command, the control system drives the worm gear jack 31 to move. The lead screw of the worm gear jack 31 generates precise axial displacement, which drives the push-pull ring 334 to move through the push-pull rod 333. The push-pull ring 334 converts the axial movement into the synchronous radial movement of the four sliders 336 through the leverage of the four L-shaped levers 335, thereby pre-adjusting the four dies 337 to the initial diameter that matches the set pipe diameter. This process realizes the automatic pre-adjustment of the die opening, without the need for manual replacement of the die assembly. The pipe to be processed is passed through the opened hollow spindle 3 from the right side. 4. Place the pipe between the V-shaped grippers 224 and initiate the clamping command. Both hydraulic cylinders 223 operate simultaneously, their piston rods pushing one side of the gripper 224 and its connected rack. Through the meshing transmission of the gear and rack assembly 225, the rack on the other side drives the corresponding gripper 224 to perform a completely synchronous reverse movement, thus uniformly clamping the pipe from both sides. This linkage design ensures that the clamping force always acts on the center of the pipe, achieving automatic centering and effectively preventing processing errors and equipment vibration caused by clamping eccentricity. After the pipe is firmly clamped, its axis remains coaxial with the center line of the rotating hollow spindle 34 and the cutter head mechanism 33. The operator moves the operating lever 213 towards the cutter head. The operating lever 213, through its lower protrusion 214 and recess 215, forms a... The lever mechanism converts hand movements into horizontal thrust, driving the entire feed platform 212 and its clamping mechanism 22 to slide smoothly forward along the high-precision linear guide slider assembly 211, feeding the end of the tube into the cutter head area. During this feeding process, the guard plate 221 fixed on the feed platform 212 pushes the spiral shaft 232 to move axially. Due to the helical pair between the left section of the spiral shaft 232 and the stationary rotating seat 231, this axial movement is forced into the rotational motion of the spiral shaft 232 itself. The rotation angle of the spiral shaft 232 is precisely proportional to its axial displacement, thereby driving the tube stop plate 233 fixed on it to rotate synchronously. This mechanism can adaptively ensure that the plane of the tube stop plate 233 is always automatically adjusted to align with the advancing tube. The axis remains vertical, providing precise axial positioning and support for the pipe end without the need for manual leveling. After the pipe end reaches the predetermined position (contacting or slightly passing the stop plate 233), the main cutting motor 4 is started. The output power of the motor 4 is transmitted to the reducer 32 through the synchronous belt pulley mechanism 5. After reduction and torque amplification, it drives the hollow spindle 34 and the entire cutter head mechanism 33 (including the clamp seat 331, the slider seat 332, and the closed dies 337) fixed at its front end to rotate at high speed. At the same time, the operator needs to continuously and evenly turn the operating lever 213 to maintain a constant manual feed speed, so that the pipe is continuously and slowly fed into the rotating dies 337. The cutting edges of the four rotating dies 337 simultaneously cut the pipe end to form threads. During processing,After the coolant flushes the cutter head structure 3 and the workpiece, it carries metal shavings back to the cavity 14. Impurities are intercepted by the filter screen 15, and the clean coolant is drawn by the water pump 16 and sprayed back onto the machining area through the nozzle 17, forming a cooling cycle. After the thread is machined, the operator retracts the operating lever 213, causing the clamping structure 2 to pull the tube out of the cutter head. Finally, the hydraulic cylinder 223 retracts, and the gear and rack assembly 225 causes the two grippers 224 to open synchronously, allowing the finished workpiece to be removed.

Claims

1. A threading machine for pipe threading, characterized in that, include: The threading machine body (1) has a cavity (14) on the right side. A filter screen (15) is fixed in the middle of the cavity (14). A water pump (16) is fixedly installed on the left outer wall of the cavity (14). The water pump (16) is connected to the cavity (14) by the water pump (16). The water pump (16) is connected to the nozzle (17) by the water pump (16) through a pipe. An oil tank (18) is installed inside the threading machine body (1). An oil pump is installed on one side of the oil tank (18). The clamping structure (2) is installed on the upper right side of the threading machine body, and the oil pump is connected to the clamping structure (2); The cutter head structure (3) is installed in the middle of the inside of the threading machine body (1). The nozzle (17) faces the cutter head structure (3). The cutter head structure (3) includes a worm gear jack (31) fixed to the threading machine body (1), a reducer (32) fixedly installed at the right end of the worm gear jack (31), a hollow spindle (34) fixedly installed at the output end of the reducer (32), and a cutter head mechanism (33) concentrically installed at the right end of the hollow spindle (34). The motor (4) is fixedly installed at the lower end of the threading machine body (1), and the oil tank (18) is located above the motor (4); And a synchronous pulley mechanism (5) installed between the output end of the motor (4) and the input end of the reducer (32).

2. The threading machine for pipe threading according to claim 1, characterized in that: A power distribution box (11) is installed on the left end of the threading machine body (1), and four casters (12) are installed at the four corners of the lower end of the threading machine body (1). A touch screen (13) is installed on the upper end of the threading machine body (1).

3. A threading machine for pipe threading according to claim 2, characterized in that: The clamping structure (2) includes a pushing mechanism (21) fixed to the upper end of the threading machine body (1), a clamping mechanism (22) fixed to the upper end of the pushing mechanism (21), and a baffle plate mechanism (23) located on the left side of the pushing mechanism (21) and installed on the upper end of the threading machine body (1). The pushing mechanism (21) includes a guide rail slider assembly (211), a pushing platform (212), an operating lever (213), a protruding rod (214), and a recessed seat (215). The first component (211) has two sets and is fixed on the front and rear sides of the upper end of the threading machine body (1). The push platform (212) is fixed between the upper ends of the slider of the guide rail slider assembly (211). The recess (215) is fixed on the front side of the lower end of the push platform (212). The protruding rod (214) is movably installed in the recess (215). The operating rod (213) is fixed to the lower part of the protruding rod (214) by a shaft. The operating rod (213) is located in front of the threading machine body (1).

4. A threading machine for pipe threading according to claim 3, characterized in that: The clamping mechanism (22) includes a guard plate (221), a guide rail slider assembly (222), a hydraulic cylinder (223), grippers (224), and a gear and rack assembly (225). The guard plate (221) is fixed on both sides of the upper outer periphery of the push platform (212). There are two sets of guide rail slider assemblies (222) symmetrically fixed on the left and right sides of the upper end of the push platform (212). There is a pair of grippers (224) that are fixed one-to-one with the guide rail slider assembly (225). At the upper end of the slider of 222), there is a pair of hydraulic cylinders (223) that are symmetrically fixed on the front and rear sides between the guard plate (221). The piston rod end of the hydraulic cylinder (223) is fixed to the gripper (224). The gear and rack assembly (225) is installed in the middle of the upper end of the push platform (212). The gear and rack assembly (225) is connected to the slider of the guide rail slider assembly two (222) and drives the sliders of the two sets of guide rail slider assemblies two (222) to move in opposite directions.

5. A threading machine for pipe threading according to claim 4, characterized in that: The baffle plate mechanism (23) includes a rotating seat (231), a spiral shaft (232) and a baffle plate (233). The rotating seat (231) is fixed to the threading machine body (1). The right side of the spiral shaft (232) is connected to the bearing of the guard plate (221). The left side of the spiral shaft (232) is screwed to the rotating seat (231). The baffle plate (233) is fixed outside the spiral shaft (232).

6. A threading machine for pipe threading according to claim 1, characterized in that: The hollow spindle (34) is connected to the housing of the reducer (32) by bearings. The cutter head mechanism (33) includes a die holder, a push-pull assembly, a lever (335), a slider (336), and a die (337). The right side of the hollow spindle (34) is fixedly connected to the left side of the die holder. The push-pull assembly is movably connected through the left side of the die holder. The left side of the push-pull assembly extends through the interior of the hollow spindle (34) and is connected to the lead screw of the worm gear jack (31) by bearings. There are four sliders (336) and they are slidably connected around the right end of the die holder. There are four dies (337) and they are fixed to the sliders (336) one by one with corresponding screws. There is an L-shaped lever (335) movably connected between the slider (336) and the push-pull assembly. The center of the lever (335) is rotatably connected to the interior of the die holder.

7. A threading machine for pipe threading according to claim 6, characterized in that: The die holder includes a clamp seat (331) and a slider seat (332). The left side of the clamp seat (331) is fixed to the right side of the hollow spindle (34). The slider seat (332) is fixed to the right end of the clamp seat (331). The right end of the slider seat (332) has a sliding groove around it. The sliders (336) are slidably connected to the inside of the sliding grooves one by one.

8. A threading machine for pipe threading according to claim 7, characterized in that: The push-pull assembly includes a push-pull rod (333) and a push-pull ring (334). The push-pull ring (334) is located inside the clamp seat (331). The push-pull rod (333) is fixed to the left end of the push-pull ring (334). The left part of the push-pull rod (333) moves through the clamp seat (331) and extends through the hollow main shaft (34). The left part of the push-pull rod (333) is connected to the lead screw of the worm gear jack (31) through a bearing.

9. A threading machine for pipe threading according to claim 8, characterized in that: The outer ring groove of the push-pull ring (334) has inner ring grooves at both ends. The first end of the lever (335) is movably embedded in the inner ring groove. The center of the lever (335) is rotatably connected to the clamp seat (331). The left end of the slider (336) has a movable groove. The end of the lever (335) is movably embedded in the movable groove.

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