A thread cutting device for machining thread cores

Abstract

This invention relates to the field of metal cutting technology, specifically to a threaded mandrel cutting device, comprising a machine base, a cutting machine for mandrel processing fixedly mounted on the inner end of the machine base by bolts, a support cylinder fixedly mounted on the inner end of the machine base, a support frame fixedly mounted on the inner end of the support cylinder, an outer protective tube rotatably mounted on the inner end of the support frame, a counterweight fixedly mounted on the end of the outer protective tube away from the support frame, and multiple grippers rotatably mounted on the outer surface of the counterweight. By inserting the support tube in the forward or reverse direction relative to the outer protective tube, the flow path of the cutting fluid can be automatically switched between an "external spray structure" and an "internal spray structure," achieving adjustment of the fluid supply direction without the need for additional valve bodies or conversion mechanisms. The baffle structure inside the sealing sleeve, in conjunction with the relative positions of the guide pipe and the outlet hole, allows the cutting fluid to automatically open or close the corresponding flow path under pressure, ensuring that the cutting fluid spray is always at the optimal position, improving overall processing efficiency and stability.

Description

Technical Field

[0001] This invention relates to the field of metal cutting technology, specifically to a thread cutting device for machining thread cores. Background Technology

[0002] Threaded mandrels are key components widely used in industries such as petroleum, chemical, machinery manufacturing, and fluid control. Their main functions are to achieve reliable connection and sealing between components or to act as valve cores for fluid control. Threaded mandrels typically include an external or internal thread portion and an end for cutting off or connecting fluid (i.e., the "mandrel"). Their structural precision and surface quality directly affect the reliability and service life of the entire system.

[0003] In the thread machining process, the supply method of cutting fluid is crucial. Traditional mandrel machining equipment mostly adopts a single axial or lateral fluid supply mode with a fixed spray direction, which makes it difficult to achieve directional cooling and multi-point chip removal for different machining parts. In external thread machining, since the cutting point is distributed on the outer surface of the mandrel, if the cutting fluid spray position is insufficient, it will cause problems such as insufficient cooling and metal chip accumulation. In internal thread machining, the machining area is located in a narrow inner hole, and the cutting fluid has difficulty entering the depth of the hole, resulting in poor chip removal, burning of the machined surface, and even accelerated tool wear. Therefore, this application proposes a thread mandrel machining cutting device. Summary of the Invention

[0004] The purpose of this invention is to provide a thread core cutting device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a threaded mandrel cutting device, comprising a machine base, a cutting machine for mandrel processing fixedly mounted on the inner end of the machine base by bolts, a support cylinder fixedly mounted on the inner end of the machine base, a support frame fixedly mounted on the inner end of the support cylinder, and an outer protective tube rotatably mounted on the inner end of the support frame. A counterweight is fixedly mounted on the end of the outer protective tube away from the support frame to provide an inertial torque for the rotation of the outer protective tube, thereby ensuring the rotational speed stability during the cutting process. Multiple grippers are rotatably mounted on the outer surface of the counterweight, and the multiple grippers are evenly distributed along the circumferential direction. When the ends of the grippers are retracted towards the center, they can clamp and fix the mandrel. An outer sleeve is fitted on the side of the counterweight away from the outer protective tube, and the multiple grippers are located inside the outer sleeve. The outer sleeve is used to limit and protect the grippers. A support tube passes through the inside of the outer protective tube to provide axial support and guidance for the mandrel.

[0006] As a further embodiment of the present invention, multiple fastening plates are fixedly installed on the side of the outer sheath near the outer protective tube. Multiple sliding grooves are formed on the surface of the counterweight, and the fastening plates slide radially within the sliding grooves. A locking ring is rotatably installed on the outer surface of the counterweight, and a threaded groove is formed on the outer surface of the fastening plates. The locking ring is threadedly sleeved within the threaded grooves of the multiple fastening plates. When the locking ring rotates, the fastening plates move toward the counterweight under the threaded guidance of the locking ring, thereby realizing the fastening adjustment between the outer sheath and the counterweight.

[0007] As a further embodiment of the present invention, the inner end of the outer sheath is rotatably mounted with multiple folding frames, which are evenly arranged along a circumferential direction. The free end of each folding frame is fixedly connected to a collecting plug. The inner end of the outer sheath is fixedly mounted with multiple nozzles, which are respectively arranged opposite to the corresponding folding frames. Each nozzle is connected to its corresponding collecting plug through a guide tube, and the inner end of the collecting plug is provided with a flow guide hole, which communicates with the guide tube.

[0008] As a further embodiment of the present invention, the inner end of the support tube is provided with two support rings, and multiple locking plates are fixedly installed between the two support rings. The support ring on the side closer to the positioning ring is connected to the support tube by an auxiliary spring. Multiple rectangular holes are opened on the surface of the support tube, and the surface of the locking plate is exposed on the outside of the support tube after passing through the rectangular holes.

[0009] As a further embodiment of the present invention, an inner tube is provided through the inner end of the support tube, and the inner tube is provided inside the support ring. An auxiliary tube is provided inside the support tube, and an isolation plate is fixedly sleeved on the outer surface of the auxiliary tube. A sealing sleeve is provided inside the support tube, and the sealing sleeve is respectively sleeved on the outer surfaces of the auxiliary tube and the inner tube. By sequentially arranging the inner tube, the auxiliary tube and the sealing sleeve inside the support tube, and fixing the isolation plate outside the auxiliary tube, a clear separation and flow guiding structure is formed between the pipes.

[0010] As a further embodiment of the present invention, a guide rod is provided through the inner end of the auxiliary tube, and multiple diverting rods are rotatably installed at the end of the guide rod away from the auxiliary tube. The multiple diverting rods are evenly arranged in the circumferential direction. A sealing plate is fixedly installed at the inner end of the auxiliary tube, and the guide rod passes through the inside of the sealing plate. A guide groove is provided on the outer surface of the guide rod.

[0011] As a further embodiment of the present invention, a partition is installed inside the sealing sleeve, dividing its internal space into two chambers. A guide tube is inserted through the partition. One end of the guide tube near the partition is sealed, while the other end is open. A passive plug is fixedly installed at the end of the guide tube near the guide rod. The sealing sleeve is divided into two independent chambers by the partition, so that the fluids or gases in the different chambers do not interfere with each other, which helps to maintain stable internal pressure, improve sealing performance, and prevent media leakage.

[0012] As a further embodiment of the present invention, the passive plug and the sealing sleeve are connected by a guide spring. The outer surface of the guide tube is provided with a liquid outlet hole. When the sealing sleeve moves towards the auxiliary tube, its inner partition passes over the liquid outlet hole, exposing the liquid outlet hole. Through the guide spring connection between the passive plug and the sealing sleeve, the passive plug can automatically respond to the position change when the sealing sleeve moves, thereby realizing the automatic opening and closing of the fluid channel without the need for an external drive structure, thus improving the automation level of the system.

[0013] As a further embodiment of the present invention, a pushing ring is fixedly sleeved on the surface of the sealing sleeve, and multiple locking brackets are rotatably installed on one end of the isolation plate near the pushing ring. Multiple slots are opened on the surface of the support tube, and the slots correspond to the locking brackets. Multiple triangular blocks are fixedly installed on the surface of the pushing ring, and multiple locking rods are rotatably installed on the surface of the pushing ring. The locking rods are located between the locking brackets and the pushing ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. During use, the present invention allows the cutting fluid flow path to automatically switch between the "external spray structure" and the "internal spray structure" by inserting the support tube in the forward or reverse direction relative to the outer protective tube. The direction of fluid supply can be adjusted without the need for additional valve body or adapter mechanism. The relative position of the baffle structure inside the sealing sleeve with the guide tube and the outlet hole allows the cutting fluid to automatically open or close the corresponding flow path under pressure, ensuring that the cutting fluid spray is always at the optimal position, thereby improving the overall processing efficiency and stability.

[0016] 2. In the external thread machining process, the cutting fluid is diverted through the connector to multiple collection plugs and enters the nozzle through the guide tube, forming a circumferential multi-point spray. This can uniformly flush and cool the surface of the core head. In the internal thread machining process, the cooperation of the guide rod and the diverting rod allows the cutting fluid to be centrifugally sprayed from the guide groove to all sides. The spray forms a circumferential curtain structure that can cover the entire machining area of ​​the inner hole wall. This can remove metal chips in time and prevent accumulation. At the same time, it can effectively suppress the accumulation of machining heat, reduce cutting burns, and improve the forming quality of the hole wall and thread, thereby significantly improving machining stability and finished product consistency.

[0017] 3. The locking frame of the present invention can automatically unfold and pass through the slot for positioning with the cooperation of the push ring and the triangular block. At the same time, the locking rod automatically engages in the positioning groove under the action of centrifugal force, so that the locking frame can maintain a stable support state even under high-speed rotation, and avoid axial displacement of the support tube due to reverse loosening or vibration. Attached Figure Description

[0018] Figure 1 A schematic diagram of a thread cutting device for machining thread cores;

[0019] Figure 2 A schematic diagram of the internal structure of a thread cutting device for machining thread cores;

[0020] Figure 3 This is a schematic diagram of the internal structure of the support cylinder;

[0021] Figure 4 This is a structural diagram showing the disassembled components of the support frame and outer protective tube.

[0022] Figure 5 A schematic diagram showing the internal structure of the outer sheath after disassembly.

[0023] Figure 6 A schematic diagram of the internal structure of the collection plug and nozzle;

[0024] Figure 7 This is a schematic diagram of the internal structure of the outer protective tube;

[0025] Figure 8 This is a schematic diagram of the internal structure of the support tube;

[0026] Figure 9 This is a structural diagram of the auxiliary tube inside the support tube;

[0027] Figure 10 This is a schematic diagram of the internal structure of the auxiliary tube;

[0028] Figure 11 This is an exploded view of the isolation plate and locking frame.

[0029] In the diagram: 1. Machine base; 2. Cutting machine; 3. Support cylinder; 4. Water pipe;

[0030] 101. Outer protective tube; 102. Drive gear; 103. Drive motor; 104. Support frame; 105. Driven gear; 106. Locking ring; 107. Outer sheath; 108. Gripper; 109. Counterweight; 110. Fastening plate; 111. Top plate; 112. Folding frame; 113. Guide tube; 114. Nozzle; 115. Collection plug;

[0031] 201. Support tube; 202. Positioning ring; 203. Locking plate; 204. Connector; 205. Inner tube; 206. Auxiliary spring; 207. Support ring;

[0032] 301. Auxiliary pipe; 302. Isolation plate; 303. Locking frame; 304. Sealing sleeve; 305. Push ring; 306. Locking rod; 307. Diverting rod; 308. Guide rod; 309. Sealing plate; 310. Return spring; 311. Passive plug; 312. Guide spring; 313. Guide pipe; 314. Liquid outlet; 315. Plug. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figures 1-4 A threaded mandrel cutting device includes a machine base 1. A cutting machine 2 for mandrel cutting is fixedly installed on the inner end of the machine base 1 by bolts. The cutting machine 2 is an existing mature device and will not be described in detail here. A support cylinder 3 is fixedly installed on the inner end of the machine base 1. A support frame 104 is fixedly installed on the inner end of the support cylinder 3. An outer protective tube 101 is rotatably installed on the inner end of the support frame 104. A counterweight 109 is fixedly installed on the end of the outer protective tube 101 away from the support frame 104 to provide inertial torque for the rotation of the outer protective tube 101, so as to ensure the rotational speed stability during the cutting process.

[0035] Multiple grippers 108 are rotatably mounted on the outer surface of the counterweight 109. The multiple grippers 108 are evenly distributed along the circumference. When the ends of the grippers 108 are brought together in the center direction, they can clamp and fix the core head. An outer sleeve 107 is fitted on the side of the counterweight 109 away from the outer protective tube 101. The multiple grippers 108 are located inside the outer sleeve 107. The outer sleeve 107 is used to limit and protect the grippers 108. A support tube 201 is inserted inside the outer protective tube 101 to provide axial support and guidance for the core head.

[0036] The inner end of the support frame 104 is fixedly mounted with a drive motor 103 by a clamp. The output end of the drive motor 103 is fixedly connected with a drive gear 102. The outer surface of the outer protective tube 101 is fixedly fitted with a driven gear 105. The drive gear 102 meshes with the driven gear 105 to realize the rotation drive of the outer protective tube 101. The inner end of the machine base 1 is fixedly mounted with a water pipe 4 by a clamp. The output end of the water pipe 4 is fixedly mounted on the inner end of the support frame 104 and is movably connected to the input end of the outer protective tube 101. It is used to deliver coolant or lubricant to the clamping area during the cutting process to reduce the cutting temperature, improve the chip removal effect and improve the processing quality. The input end of the water pipe 4 is connected to the water pump inside the machine base 1.

[0037] like Figures 4-6 As shown, multiple fastening plates 110 are fixedly installed on the side of the outer sheath 107 near the outer sheath tube 101. Multiple grooves are formed on the surface of the counterweight 109, and the fastening plates 110 slide radially within these grooves. A locking ring 106 is rotatably mounted on the outer surface of the counterweight 109. Threaded grooves are formed on the outer surface of the fastening plates 110, and the locking ring 106 is threaded into the threaded grooves of the multiple fastening plates 110. When the locking ring 106 rotates, the fastening plates 110 are engaged with the threads of the locking ring 106. Under the guidance of the counterweight 109, the outer sheath 107 moves towards the counterweight 109, thereby achieving the fastening adjustment between the outer sheath 107 and the counterweight 109. Specifically, a guide block (not shown in the figure) is fixedly installed at the inner end of the outer sheath 107. The surface of the guide block contacts the outer surface of the jaw 108. When the outer sheath 107 moves towards the counterweight 109, the guide block pushes each jaw 108 to rotate along its mounting axis, causing the jaws 108 to gradually retract towards the center to clamp and fix the core head.

[0038] Multiple folding frames 112 are rotatably installed on the inner end of the outer sheath 107. The multiple folding frames 112 are evenly arranged along the annular direction. A collection plug 115 is fixedly connected to the free end of the folding frame 112. Multiple nozzles 114 are fixedly installed on the inner end of the outer sheath 107. The multiple nozzles 114 are respectively arranged opposite to the corresponding folding frame 112. Each nozzle 114 is connected to its corresponding collection plug 115 through a guide tube 113. The inner end of the collection plug 115 is provided with a guide hole, which is connected to the guide tube 113.

[0039] The surface of the collecting plug 115 is covered with a sealing sleeve to prevent the cutting fluid from leaking out. Specifically, multiple collecting plugs 115 are combined into a circular shape, and the nozzle of the nozzle 114 is oriented towards the side of the core tip to be cut.

[0040] Example 2: Please refer to Figure 4 , Figures 6-8 A threaded mandrel cutting device, based on Embodiment 1, has a positioning ring 202 fixedly sleeved on the outer surface of the support tube 201. The positioning ring 202 is located on the outside of the outer protective tube 101. A top plate 111 is fixedly installed at one end of a plurality of grippers 108 that are close to each other. The positioning ring 202 is located between the top plate 111 and the counterweight 109. The top plate 111 is made of rubber and has a certain elasticity. When the grippers 108 rotate and clamp the mandrel, the top plate 111 moves toward the counterweight 109 under the drive of the grippers 108 and presses the positioning ring 202 into the interior of the counterweight 109. Because the top plate 111 has flexibility and resilience, it can maintain stable pressing of the positioning ring 202 when the grippers 108 are at different rotation angles, thereby maintaining the reliability of the positioning structure.

[0041] The inner end of the support tube 201 is provided with two support rings 207. The support ring 207 on the side away from the positioning ring 202 is fixedly connected to the support tube 201. Multiple locking plates 203 are fixedly installed between the two support rings 207. The locking plates 203 are made of elastic metal and their outer surface is covered with anti-slip rubber pads. The support ring 207 on the side closer to the positioning ring 202 is connected to the support tube 201 through an auxiliary spring 206. Multiple rectangular holes are opened on the surface of the support tube 201, and the surface of the locking plates 203 is exposed on the outside of the support tube 201 after passing through the rectangular holes. At this time, under the elastic force of the auxiliary spring 206, the support ring 207 that is not fixed to the support tube 201 moves towards the positioning ring 202, thereby pushing the middle part of the locking plate 203 to bulge outward of the support tube 201, so that the locking plate 203 and the inner wall of the outer protective tube 101 are tightly fitted, and the positioning and limiting of the support tube 201 are achieved through friction.

[0042] An inner tube 205 is inserted through the inner end of the support tube 201, and the inner tube 205 is inserted inside the support ring 207. A connector 204 is fixedly connected to the side of the inner tube 205 near the positioning ring 202. The connector 204 has a trumpet-shaped structure, and the central axis of the connector 204 is consistent with the central axis of the circular structure formed by the combination of multiple collecting plugs 115. When the outer sheath 107 moves towards the counterweight 109, the collecting plugs 115 enter the interior of the connector 204 in sequence. Since the outer surface of the collecting plugs 115 is covered with a sealing sleeve, they are pressed together by the inner wall of the trumpet-shaped connector 204, thereby improving the sealing effect and preventing leakage when the cutting fluid flows.

[0043] Specifically, the support tube 201 can be pulled out from inside the outer protective tube 101 after the locking structure is released, and can be re-inserted into the outer protective tube 101 in a different direction. That is, one end of the connector 204 is inserted into the input end of the outer protective tube 101. More specifically, the positioning ring 202 is located on the side close to the connector 204. When the support tube 201 is inserted into the outer protective tube 101 in a different direction, the locking plate 203, which was originally located inside the outer protective tube 101, will be exposed on the outside of the counterweight 109. At this time, the installation direction of the support tube 201 inside the outer protective tube 101 is switched, and bidirectional assembly can be achieved according to the specifications of different cores or the usage requirements of the device.

[0044] Example 3: Please refer to Figures 8-10 A threaded core cutting device, based on embodiments 1 and 2, wherein an auxiliary tube 301 is inserted inside the support tube 201, an isolation plate 302 is fixedly sleeved on the outer surface of the auxiliary tube 301, a sealing sleeve 304 is provided inside the support tube 201, and the sealing sleeve 304 is respectively sleeved on the outer surface of the auxiliary tube 301 and the inner tube 205, wherein the inner end of the sealing sleeve 304 is provided with a sealing gasket to increase the sealing performance;

[0045] A guide rod 308 is inserted through the inner end of the auxiliary pipe 301. Multiple diverting rods 307 are rotatably installed at the end of the guide rod 308 away from the auxiliary pipe 301. The multiple diverting rods 307 are evenly arranged in the circumferential direction. Adjacent diverting rods 307 are connected by an isolation membrane, so that the diverting rods 307 have an umbrella-shaped structure. In the default state, the diverting rods 307 are closed to each other. A sealing plate 309 is fixedly installed at the inner end of the auxiliary pipe 301, and the guide rod 308 passes through the inside of the sealing plate 309. A guide groove is opened on the outer surface of the guide rod 308 to connect the space on both sides of the sealing plate 309.

[0046] A plug 315 is fixedly connected to the end of the guide rod 308 away from the diverter rod 307. The plug 315 is connected to the sealing plate 309 by a return spring 310. Under the elastic action of the return spring 310, the guide rod 308 can be prevented from moving excessively to the outside, thereby maintaining the normal working position of the guide rod 308. A partition is installed inside the sealing sleeve 304, and its internal space is divided into two chambers. A guide tube 313 is inserted inside the partition. The end of the guide tube 313 near the partition is in a sealed state, and the other end is an open structure.

[0047] A passive plug 311 is fixedly installed at one end of the guide tube 313 near the guide rod 308. Two limiting rings are fixedly installed at the inner end of the auxiliary tube 301. The passive plug 311 is located between the two limiting rings to limit the movement space of the passive plug 311. The passive plug 311 is connected to the sealing sleeve 304 by a guide spring 312. A liquid outlet hole 314 is opened on the outer surface of the guide tube 313. When the sealing sleeve 304 moves towards the auxiliary tube 301, its inner partition passes over the liquid outlet hole 314, exposing the liquid outlet hole 314. The cutting fluid can then enter the guide tube 313 and finally be discharged along the guide groove on the surface of the guide rod 308.

[0048] More specifically, a counterweight is fixedly installed at the end of the diverter rod 307 away from the guide rod 308, and a chute is opened on the surface of the counterweight. During the high-speed rotation of the auxiliary pipe 301 with the outer protective pipe 101, the diverter rod 307 opens outward under the action of centrifugal force, and its end contacts the inner edge of the auxiliary pipe 301, thereby changing the flow direction of the cutting fluid, so that the cutting fluid is sprayed out from all sides, rather than flowing out directly along the axial outlet of the auxiliary pipe 301, thus forming a circumferential dispersion spraying effect.

[0049] like Figure 9 , Figure 11As shown, a push ring 305 is fixedly sleeved on the surface of the sealing sleeve 304. Multiple locking brackets 303 are rotatably installed on the end of the isolation plate 302 near the push ring 305. Multiple slots are opened on the surface of the support tube 201, and the slots correspond to the locking brackets 303. Multiple triangular blocks are fixedly installed on the surface of the push ring 305, and the triangular blocks correspond to the locking brackets 303. Their inclined surfaces are in contact with the surface of the locking brackets 303. When the push ring 305 moves towards the isolation plate 302, the inclined surfaces of the triangular blocks push the locking brackets 303, causing them to rotate and pass through the slots, and finally contact the inner end of the core head, making the core head more stable during rotation.

[0050] Multiple locking rods 306 are rotatably mounted on the surface of the push ring 305. The locking rods 306 are located between the locking frame 303 and the push ring 305. During the rotation of the support tube 201, the locking rods 306 rotate under the action of centrifugal force and abut against the outer surface of the locking frame 303. The outer surface of the locking frame 303 is provided with multiple positioning grooves. After rotation, the locking rods 306 can be inserted into the corresponding positioning grooves, thereby supporting the locking frame 303 and preventing it from rotating in the opposite direction.

[0051] Specifically, the locking rod 306 and the pushing ring 305 are engaged by a torsion spring. The rotational force provided by the torsion spring is less than the centrifugal force experienced by the locking rod 306 when the support tube 201 rotates. Therefore, during the high-speed rotation of the device, the locking rod 306 can remain engaged in the positioning groove under the action of centrifugal force. When the support tube 201 stops rotating, the locking rod 306 automatically returns to its initial position under the elastic force of the torsion spring, thereby releasing the locking constraint on the locking frame 303 and facilitating the restoration or adjustment of the pushing ring 305.

[0052] The working principle of this invention is:

[0053] In use, the fixed end of the core to be processed is placed inside the outer sheath 107, and the locking ring 106 is rotated to fix the core with the gripper 108. Then the output end of the drive motor 103 drives the drive gear 102 to rotate. Then the driven gear 105 drives the outer sheath 101 to rotate under the action of meshing with the drive gear 102. At this time, the cutting machine 2 processes the core. At this time, the water pump inside the machine 1 delivers cutting fluid to the water pipe 4. The cutting fluid enters from the auxiliary pipe 301 and then comes to the inside of the guide pipe 313. Under the action of pressure, the guide pipe 313 moves, allowing the liquid outlet 314 to pass over the partition inside the sealing sleeve 304. Then it flows through the inner pipe 205 to the connector 204. At this time, the connector 204 distributes the cutting fluid to the inside of each collection plug 115.

[0054] Immediately afterwards, the cutting fluid enters the interior of the nozzle 114 through the guide tube 113 and is sprayed out from the nozzle 114 to wash away the metal chips on the surface of the core during the machining process, and at the same time cools it down.

[0055] When it is necessary to cut the internal thread of the core, the support tube 201 is pulled out and its position is changed so that the connector 204 is inserted into the outer protective tube 101. Then, the core that needs to be internally threaded is put on the outside of the support tube 201 and the locking ring 106 is rotated again to clamp it.

[0056] As the outer protective tube 101 continues to rotate and the cutting fluid flows, the cutting fluid flows from the connector 204 into the sealing sleeve 304. Under pressure, it pushes the baffle inside the sealing sleeve 304 to move, allowing the baffle to pass over the outlet hole 314. Then, the cutting fluid flows out from the guide groove on the surface of the guide rod 308. At the same time, as the outer protective tube 101 rotates, the diverter rod 307 opens outward under the action of centrifugal force, and its end contacts the inner edge of the auxiliary tube 301. This changes the flow direction of the cutting fluid, causing the cutting fluid to spray out from all sides instead of flowing directly out along the axial outlet of the auxiliary tube 301, thus forming a circumferential dispersion spray effect. This achieves flushing and cooling during the internal thread machining process.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A threaded core cutting device, comprising a machine base (1), characterized in that: The inner end of the machine base (1) is fixedly mounted with a cutting machine (2) for core head processing by bolts. The inner end of the machine base (1) is fixedly mounted with a support cylinder (3). The inner end of the support cylinder (3) is fixedly mounted with a support frame (104). The inner end of the support frame (104) is rotatably mounted with an outer protective tube (101). A counterweight (109) is fixedly mounted at the end of the outer protective tube (101) away from the support frame (104) to provide an inertial torque for the rotation of the outer protective tube (101) to ensure the rotational speed stability during the cutting process. The outer end of the counterweight (109) is fixedly mounted with a counterweight (109). Multiple grippers (108) are rotatably mounted on the surface. The grippers (108) are evenly distributed along the circumference. When the ends of the grippers (108) are brought together in the center direction, they can clamp and fix the core head. An outer sleeve (107) is fitted on the side of the counterweight block (109) away from the outer protective tube (101). The multiple grippers (108) are located inside the outer protective sleeve (107). The outer protective sleeve (107) is used to limit and protect the grippers (108). A support tube (201) is inserted inside the outer protective tube (101) to provide axial support and guidance for the core head.

2. The thread core cutting device according to claim 1, characterized in that: Multiple fastening plates (110) are fixedly installed on the side of the outer sheath (107) near the outer sheath (101). Multiple sliding grooves are opened on the surface of the counterweight (109). The fastening plates (110) slide radially in the sliding grooves. A locking ring (106) is rotatably installed on the outer surface of the counterweight (109). A threaded groove is opened on the outer surface of the fastening plates (110). The locking ring (106) is threadedly sleeved in the threaded grooves of the multiple fastening plates (110). When the locking ring (106) rotates, the fastening plates (110) move toward the counterweight (109) under the threaded guidance of the locking ring (106), thereby realizing the fastening adjustment between the outer sheath (107) and the counterweight (109).

3. The thread core cutting device according to claim 2, characterized in that: The inner end of the outer sheath (107) is also rotatably mounted with multiple folding frames (112). The multiple folding frames (112) are evenly arranged along the annular direction. The free end of the folding frame (112) is fixedly connected with a collection plug (115). The inner end of the outer sheath (107) is fixedly mounted with multiple nozzles (114). The multiple nozzles (114) are respectively arranged opposite to the corresponding folding frame (112). Each nozzle (114) is connected to its corresponding collection plug (115) through a guide tube (113). The inner end of the collection plug (115) is provided with a flow guide hole, which is connected to the guide tube (113).

4. The thread core cutting device according to claim 3, characterized in that: The inner end of the support tube (201) is provided with two support rings (207), and multiple locking plates (203) are fixedly installed between the two support rings (207). The support ring (207) on the side closer to the positioning ring (202) is connected to the support tube (201) by an auxiliary spring (206). Multiple rectangular holes are opened on the surface of the support tube (201), and the surface of the locking plate (203) is exposed on the outside of the support tube (201) after passing through the rectangular holes.

5. The thread core cutting device according to claim 1, characterized in that: The inner end of the support tube (201) is provided with an inner tube (205), and the inner tube (205) is provided inside the support ring (207). An auxiliary tube (301) is provided inside the support tube (201). An isolation plate (302) is fixedly sleeved on the outer surface of the auxiliary tube (301). A sealing sleeve (304) is provided inside the support tube (201). The sealing sleeve (304) is respectively sleeved on the outer surfaces of the auxiliary tube (301) and the inner tube (205).

6. The thread core cutting device according to claim 5, characterized in that: A guide rod (308) is inserted through the inner end of the auxiliary tube (301). Multiple diverting rods (307) are rotatably installed at the end of the guide rod (308) away from the auxiliary tube (301). The multiple diverting rods (307) are evenly arranged in the circumferential direction. A sealing plate (309) is fixedly installed at the inner end of the auxiliary tube (301), and the guide rod (308) is inserted inside the sealing plate (309). A guide groove is opened on the outer surface of the guide rod (308).

7. The thread core cutting device according to claim 6, characterized in that: The sealing sleeve (304) has a partition installed inside, which divides its internal space into two chambers. A guide tube (313) is installed inside the partition. One end of the guide tube (313) near the partition is sealed, and the other end is open. A passive plug (311) is fixedly installed at the end of the guide tube (313) near the guide rod (308).

8. The thread core cutting device according to claim 7, characterized in that: The passive plug (311) and the sealing sleeve (304) are connected by a guide spring (312). The outer surface of the guide tube (313) is provided with a liquid outlet hole (314). When the sealing sleeve (304) moves towards the auxiliary tube (301), its inner partition passes over the liquid outlet hole (314), exposing the liquid outlet hole (314).

9. A thread core cutting device according to claim 8, characterized in that: The sealing sleeve (304) is fixedly fitted with a push ring (305). The isolation plate (302) is rotatably mounted with multiple locking brackets (303) at one end near the push ring (305). The support tube (201) has multiple slots on its surface, which correspond to the locking brackets (303). The push ring (305) is fixedly mounted with multiple triangular blocks on its surface. The push ring (305) is rotatably mounted with multiple locking rods (306) on its surface, which are located between the locking brackets (303) and the push ring (305).

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