Threading machine

Abstract

The utility model relates to the technical field of vacuum cup production, in particular to a threading machine which comprises a rack, a plurality of guide rails, a plurality of threaded rods and a plurality of threaded rods. The two sets of carrying assemblies are distributed in an array mode and used for carrying the workpieces, and feeding and discharging of the workpieces are achieved; the placing tool is used for bearing a workpiece and driving the workpiece to rotate; the working assembly is used for forming threads on a workpiece and comprises a supporting rod installed on the rack, and a fixing plate is installed at the top of the supporting rod. The sliding plate is arranged on the supporting rod in a sliding mode, and a movable plate is arranged on the sliding plate in a sliding mode; a fixed block is mounted on the movable plate, and a first connecting groove and two groove holes communicated with the first connecting groove are formed in the two sides of the fixed block respectively; the positioning plate is mounted on the fixing block, and a second connecting groove corresponding to the first connecting groove is formed in the positioning plate; the output motor is mounted on the positioning plate, and the output end of the output motor penetrates through the positioning plate; and the first transmission gear is mounted at the output end of the output motor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vacuum cup production, and particularly relates to a threading machine. BACKGROUND

[0002] In the vacuum cup production process, threading is an important link. The traditional threading equipment usually needs manual operation in the feeding and discharging process of the workpiece, has low automation degree, high labor intensity, and certain safety hazards. In addition, when different specifications of vacuum cups are processed, the replacement of different rolling wheels is relatively cumbersome, resulting in inconvenient use.

[0003] To this end, the present application provides a threading machine to solve the above problems. SUMMARY

[0004] The present application aims to at least solve one of the technical defects.

[0005] To this end, one object of the present application is to provide a threading machine to solve the problems mentioned in the background art and overcome the deficiencies in the prior art.

[0006] To achieve the above object, embodiments of one aspect of the present application provide a threading machine, comprising: a rack on which a plurality of guide rails are installed; two groups of arrayed carrying assemblies for carrying workpieces to realize feeding and discharging of the workpieces; a placing tool for carrying and rotating the workpieces; a working assembly for threading the workpieces, comprising: a support rod installed on the rack, a fixed plate being installed on the top of the support rod; a sliding plate slidingly arranged on the support rod, a moving plate slidingly arranged on the sliding plate; a fixed block being installed on the moving plate, first connecting grooves and two slot holes in communication with the first connecting grooves being respectively formed on the two sides of the fixed block; a positioning plate being installed on the fixed block, a second connecting groove corresponding to the first connecting groove being formed on the positioning plate; an output motor being installed on the positioning plate, an output end of the output motor penetrating through the positioning plate; a first transmission gear being installed on the output end of the output motor; a positioning rod being rotatably arranged in one of the slot holes, a second transmission gear being installed on the positioning rod, the second transmission gear being engaged with the first transmission gear; a transmission rod being rotatably arranged in the other slot hole, a third transmission gear being installed on the transmission rod, the third transmission gear being engaged with the second transmission gear; a working head replacement assembly for replacing the working head for threading to match workpieces of different specifications, comprising: a connecting block, the top of the connecting block being installed on the bottom of the transmission rod, a connecting groove penetrating one end being formed in the connecting block; an installation frame being detachably arranged with the connecting block, a locking groove being formed in the installation frame, a guide groove being further formed in the installation block; a rolling wheel being installed on the bottom of the installation frame; a locking block being slidingly arranged in the connecting groove for cooperating with the locking groove; a driving block being slidingly arranged in the connecting groove for cooperating with the locking block; a return spring, one end of the return spring being installed in the connecting groove, the other end of the return spring being connected to the top of the driving block, the return spring providing a force to the driving block.

[0007] According to any one of the above solutions, preferably, the single group of carrying assemblies comprises: a first motor providing driving force for the carrying assemblies; a first gear and a first rack engaged with the first gear, wherein the first gear is installed on the output end of the first motor; a fixed frame slidingly arranged on the guide rail, one end of the fixed frame being connected to the first rack; a swing arm rotatably installed on the fixed frame; a clamping piece driven by an electric sliding rail, the clamping piece being installed on one end of the swing arm, the clamping piece being used for clamping the workpiece; a second motor installed on the fixed frame, an output end of the second motor extending and being connected to one end of the swing arm; a first pulley installed on the output end of the second motor; a second pulley connected with the first pulley through a first synchronous belt, the second pulley being installed on the clamping piece.

[0008] According to any one of the above solutions, preferably, the placing tool comprises: a fixed sleeve installed on the rack; a placing table rotatably arranged on the top of the fixed sleeve; a third motor installed on the bottom of the fixed sleeve, an output end of the third motor being connected to the bottom of the placing table.

[0009] Preferably, the placing tool further comprises: a fourth motor installed on the frame; a second gear and a second rack engaged therewith, the second gear being installed on the output end of the fourth motor; a skid frame slidingly arranged on the guide rail, one end of the skid frame being connected to the second rack; and a pressing block rotationally arranged on the skid frame and used for pressing the workpiece.

[0010] Preferably, the placing tool is used for placing a workpiece to be processed, and the placing assembly comprises: a side support installed on the frame; a positioning frame slidingly arranged on the side support; a support table rotationally arranged on the positioning frame, the support table being provided at the bottom with a driven gear; two groups of clamping jaws driven by a cylinder and installed at two ends of the support table; a fifth motor installed on the side support, an output end of the fifth motor being provided with a driving gear engaged with the driven gear; a sixth motor installed on the side support; a gear box installed on the side support, one end of the gear box being connected to the output end of the sixth motor, and the other end of the gear box being provided with a first sliding block; a first lead screw threadedly connected with the first sliding block, the first lead screw penetrating through but not contacting the side support, and the first lead screw being rotationally installed at the top of the support table.

[0011] Preferably, the working assembly further comprises: two second lead screws rotationally arranged on the fixed plate; a second sliding block threadedly arranged on the second lead screw, the second sliding block being installed on the sliding plate; two third pulleys respectively installed on the two second lead screws, the two third pulleys being driven by a second synchronous belt; a first driving motor installed on the fixed plate through a support block, an output end of the first driving motor being connected to one of the second lead screws through a connecting sleeve; a third lead screw provided with a third sliding block threadedly arranged thereon, the third sliding block being installed at the bottom of the moving plate; and a second driving motor installed on the sliding plate through a side support block, an output end of the second driving motor being connected to the third lead screw.

[0012] Preferably, the working head replacing assembly further comprises: a square rod installed in the connecting groove, a driving block slidingly arranged on the square rod; an operating rod installed at one end of the driving block, the operating rod slidingly arranged in the connecting groove; a compression spring having one end installed in the connecting groove and the other end connected to a locking block; and a guide rod integrated on the connecting block, the guide rod being used for cooperating with a guide groove.

[0013] Compared with the prior art, the application has the following advantages and beneficial effects:

[0014] 1. The work head replacement assembly adopts a rolling wheel and a detachable mounting frame design, which can quickly replace work heads of different specifications, adapt to the machining needs of various workpieces, improve the versatility and flexibility of the equipment, and the cooperation of the locking block and the driving block makes the replacement process of the work head simple and fast, without the need for additional tools and easy operation.

[0015] 2. The two groups of arrayed carrying assemblies realize automatic feeding and discharging of workpieces, greatly improve production efficiency, reduce manual operation, and reduce labor intensity.

[0016] Additional aspects and advantages of the application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0018] Figure 1 is a first perspective view according to an embodiment of the present application;

[0019] Figure 2 is a second perspective view according to an embodiment of the present application;

[0020] Figure 3 is a first perspective view according to an embodiment of the present application;

[0021] Figure 4 is a second perspective view according to an embodiment of the present application;

[0022] Figure 5 is a schematic view of a work assembly according to an embodiment of the present application;

[0023] Figure 6 is a schematic view of a second drive motor installation according to an embodiment of the present application;

[0024] Figure 7 is a schematic view of a fixed block according to an embodiment of the present application;

[0025] Figure 8 is a schematic view of a work head replacement assembly according to an embodiment of the present application;

[0026] Figure 9 is a schematic view of a work head replacement assembly according to an embodiment of the present application;

[0027] Figure 10 is a schematic view of a placement assembly according to an embodiment of the present application;

[0028] Figure 11 is a schematic view of a single carrying assembly according to an embodiment of the present application;

[0029] Figure 12 Figure 1 is a schematic view of the clamping member according to the embodiment of the present application;

[0030] Figure 13 Figure 1 is a schematic view of the clamping member according to the embodiment of the present application;

[0031] Figure 14 Figure 1 is a schematic view of the clamping member according to the embodiment of the present application.

[0032] In the figure: 1, frame, 2, carrying assembly, 201, first motor, 202, first gear, 203, first rack, 204, fixing frame, 205, swing arm member, 206, clamping member, 207, second motor, 3, placement tool, 301, fixing sleeve, 302, placement table, 303, third motor, 304, fourth motor, 305, second gear, 306, second rack, 307, sliding frame, 308, pressing block, 4, working assembly, 401, support rod, 402, fixing plate, 403, sliding plate, 404, moving plate, 405, fixing block, 406, positioning plate, 407, output motor, 408, first transmission gear, 409, positioning rod, 410, second transmission gear, 411, transmission rod, 412, third transmission gear, 413, second lead screw, 414, second sliding block, 415, first drive motor, 416, third lead screw, 417, third sliding block, 418, second drive motor, 5, working head replacement assembly, 501, connecting block, 502, mounting frame, 503, rolling wheel, 504, locking block, 505, drive block, 506, return spring, 507, square rod, 508, operating rod, 509, compression spring, 6, placement assembly, 601, side support, 602, positioning frame, 603, support table, 604, driven gear, 605, clamping jaw, 606, fifth motor, 607, driving gear, 608, sixth motor, 609, gear box, 610, first lead screw. DETAILED DESCRIPTION

[0033] As shown in Figures 1 to 14 , a thread rolling machine comprises a frame 1, a carrying assembly 2, a placement tool 3, a working assembly 4, a working head replacement assembly 5 and a placement assembly 6.

[0034] Further, a plurality of guide rails are installed on the frame 1.

[0035] Further, as shown in Figures 11 to 12 , the carrying assembly 2 comprises two groups, which are arrayed on the frame 1, and is used for carrying workpieces to realize feeding and discharging of the workpieces.

[0036] The first motor 201 provides driving force for the carrying assembly.

[0037] A first gear 202 and a first rack 203 engaged with the first gear 202, wherein the first gear 202 is installed on the output end of the first motor 201;

[0038] A fixed frame 204 slidingly arranged on a guide rail, one end of the fixed frame 204 being connected to the first rack 203;

[0039] An arm 205 rotatably installed on the fixed frame 204;

[0040] A clamping member 206 driven by the electric slide rail, the clamping member 206 being installed on one end of the arm 205, and the clamping member 206 being used for clamping a workpiece;

[0041] A second motor 207 installed on the fixed frame 204, an output end of the second motor 207 extending and being connected to one end of the arm 205;

[0042] A first pulley installed on the output end of the second motor 207;

[0043] A second pulley connected with the first pulley through a first synchronous belt, the second pulley being installed on the clamping member 206.

[0044] Further, as shown in Figure 10 The placing tool 3 is used for carrying and rotating a workpiece, and comprises:

[0045] A fixed sleeve 301 installed on the rack 1;

[0046] A placing table 302 rotatably arranged on the top of the fixed sleeve 301;

[0047] A third motor 303 installed on the bottom of the fixed sleeve 301, an output end of the third motor 303 being connected to the bottom of the placing table 302;

[0048] Further comprising:

[0049] A fourth motor 304 installed on the rack 1;

[0050] A second gear 305 and a second rack 306 engaged with the second gear 305, the second gear 305 being installed on the output end of the fourth motor 304;

[0051] A sliding frame 307 slidingly arranged on a guide rail, one end of the sliding frame 307 being connected to the second rack 306;

[0052] A pressing block 308 rotatably arranged on the sliding frame 307, the pressing block 308 being used for pressing a workpiece.

[0053] Further, as shown in Figures 5 to 7 The working assembly 4 is used for tapping a workpiece, and comprises:

[0054] A support rod 401 is installed on the frame 1, and a fixing plate 402 is installed on the top of the support rod 401;

[0055] A sliding plate 403 is slidingly arranged on the support rod 401, and a moving plate 404 is slidingly arranged on the sliding plate 403;

[0056] A fixing block 405 is installed on the moving plate 404, and a first connecting groove and two groove holes communicating with the first connecting groove are respectively formed on the two sides of the fixing block 405;

[0057] A positioning plate 406 is installed on the fixing block 405, and a second connecting groove corresponding to the first connecting groove is formed on the positioning plate 406;

[0058] An output motor 407 is installed on the positioning plate 406, and an output end of the output motor 407 penetrates the positioning plate 406;

[0059] A first transmission gear 408 is installed on the output end of the output motor 407;

[0060] A positioning rod 409 is rotatably arranged in one of the groove holes, a second transmission gear 410 is installed on the positioning rod 409, and the second transmission gear 410 is engaged with the first transmission gear 408;

[0061] A transmission rod 411 is rotatably arranged in the other groove hole, a third transmission gear 412 is installed on the transmission rod 411, and the third transmission gear 412 is engaged with the second transmission gear 410;

[0062] Further comprising:

[0063] Two second lead screws 413 are rotatably arranged on the fixing plate 402;

[0064] A second sliding block 414 is threadedly arranged on the second lead screw 413, and the second sliding block 414 is installed on the sliding plate 403;

[0065] Two third pulleys are respectively installed on the two second lead screws 413, and the two third pulleys are driven by a second synchronous belt;

[0066] A first driving motor 415 is installed on the fixing plate 402 through a support block, and an output end of the first driving motor 415 is connected with one of the second lead screws 413 through a connecting sleeve;

[0067] A third lead screw 416 is provided with a third sliding block 417 threadedly arranged thereon, and the third sliding block 417 is installed on the bottom of the moving plate 404;

[0068] The second driving motor 418 is installed on the sliding plate 403 through a side supporting block, and an output end of the second driving motor 418 is connected to the third screw rod 416.

[0069] Further, as shown in Figures 8 to 9 The working head replacing assembly 5 is used for replacing the working head of the open thread to match different specifications of workpieces, and includes:

[0070] The connecting block 501 is installed at the top of the transmission rod 411, and a connecting groove penetrating one end is formed in the connecting block 501.

[0071] The mounting frame 502 is detachably arranged with the connecting block 501, and a locking groove is formed in the mounting frame 502, and a guide groove is further formed in the mounting block.

[0072] The rolling wheel 503 is installed at the bottom of the mounting frame 502, and the surface of the rolling wheel 503 is engraved with a shape opposite to the required thread, that is, a female die thread.

[0073] The locking block 504 is slidingly arranged in the connecting groove, and is used for cooperating with the locking groove, and one end of the locking block 504 is a bevel.

[0074] The driving block 505 is slidingly arranged in the connecting groove, and is used for cooperating with the locking block 504, and the bottom of the driving block 505 is in tangential contact with the bevel on the locking block 504.

[0075] The reset spring 506 is installed at one end in the connecting groove, and the other end is connected to the top of the driving block 505, so as to provide a force for the driving block 505.

[0076] Further, the working head replacing assembly 5 further includes:

[0077] The square rod 507 is installed in the connecting groove, and the driving block 505 is slidingly arranged on the square rod 507.

[0078] The operating rod 508 is installed at one end of the driving block 505, and the operating rod 508 is slidingly arranged in the connecting groove.

[0079] The compression spring 509 is installed at one end in the connecting groove, and the other end is connected with the locking block 504.

[0080] The guide rod is integrated on the connecting block 501, and the guide rod is used for cooperating with the guide groove.

[0081] Note: Figure 8 The middle is an unlocked state.

[0082] Further, as shown in Figures 13 to 14 The placing assembly 6 is used for placing the workpiece to be processed, and includes:

[0083] Side support 601, installed on the rack 1;

[0084] Positioning frame 602, slidingly arranged on the side support 601;

[0085] Supporting table 603, rotatably arranged on the positioning frame 602, the bottom of the supporting table 603 is installed with a driven gear 604;

[0086] Two groups of clamping jaws 605, driven by a cylinder, installed at both ends of the supporting table 603;

[0087] Fifth motor 606, installed on the side support 601, the output end of which is installed with a driving gear 607, which is engaged with the driven gear 604;

[0088] Sixth motor 608, installed on the side support 601;

[0089] Gear box 609, installed on the side support 601, one end of which is connected with the output end of the sixth motor 608, and the other end of which is installed with a first sliding block, which is driven by the gear box 609;

[0090] First lead screw 610, threadedly connected with the first sliding block, penetrating through but not contacting the side support 601, the top of the first lead screw 610 being rotatably installed on the supporting table 603.

[0091] A screwing machine, the working principle of which is as follows:

[0092] 1) ; The workpiece to be processed is placed on the support table 603, the workpiece is temporarily clamped by the clamping jaw 605, the first motor 201 drives the first gear 202 to rotate, and then drives the first rack 203 to move, drives the fixing frame 204 to rise to an appropriate height, avoids the collision with the workpiece, then the second motor 207 drives the swing arm 205 to rotate, simultaneously drives the first pulley, drives the second pulley to rotate through the first synchronous belt, drives the clamping piece 206 to rotate synchronously through the second pulley, until the clamping piece 206 is above the workpiece, the clamping piece 206 is lowered to an appropriate position again through the first motor 201, the workpiece is clamped through the clamping piece 206, when the workpiece is clamped by the clamping piece 206, the clamping jaw 605 is driven to move by the air cylinder, the clamping of the workpiece is released, and the third sliding block 417 is driven to rotate by the sixth motor 608, and then the third lead screw 416 is driven to move downward, the positioning frame 602 is driven to move downward, and then the support table 603 is driven to move downward (note: at this time, since the third sliding block 417 can only rotate, it belongs to the sliding block movement, the screw rotates, in this case, the sliding block remains stationary, and the screw rotates, due to the action of the screw thread, the screw moves up and down along its axial direction), avoids the collision when the workpiece moves to the position, after the workpiece at this position is removed, the support table 603 is reset by the sixth motor 608, and then the driving gear 607 is driven by the fifth motor 606, the driven gear 604 meshing with the driving gear 607 is driven to rotate, and then the support table 603 is driven to rotate half a circle, so that the workpiece can be supplemented in the vacant position.

[0093] 2) ; The workpiece is carried to the placement table 302 by one set of carrying parts, the second gear 305 is driven to rotate by the fourth motor 304, and then the second rack 306 is driven to move, the sliding frame 307 is driven to move, and the workpiece is clamped between the pressing block 308 and the placement table 302;

[0094] When processing, the placement table 302 is driven to rotate synchronously by the third motor 303, and then the workpiece is driven to rotate.

[0095] 3) ; One of the second lead screws 413 is driven to rotate by the first drive motor 415, the other second lead screw 413 is driven to rotate through the third pulley and the second synchronous belt, and then the second sliding block 414 is driven to move, the sliding plate 403 is driven to move, and the up-down position of the rolling wheel 503 is adjusted;

[0096] The third lead screw 416 is driven to rotate by the second drive motor 418, the third sliding block 417 is driven to move by the third lead screw 416, and then the moving plate 404 is driven to move, and the rolling wheel 503 is adjusted to the position of the workpiece;

[0097] After the adjustment is completed, the first transmission gear 408 is driven by the output motor 407, the second transmission gear 410 is driven by the first transmission gear 408, and the third transmission gear 412 is further driven to rotate, the transmission rod 411 is driven to rotate, and the connecting block 501 and the rolling wheel 503 are further driven to rotate, thereby performing the rolling thread operation.

[0098] 4); when the rolling head needs to be replaced (in a stopped state), the operating rod 508 is held and pulled upward, the operating rod 508 drives the driving block 505 to move, so that the locking block 504 is not under stress, and under the driving of the compression spring 509, the locking block 504 is pushed out of the locking groove, at this time, the integrated part of the connecting frame and the rolling wheel 503 can be removed, and then the rolling wheel 503 of the appropriate specification can be replaced.

Claims

1. A threading machine, characterized in that: include: a rack, on which a plurality of guide rails are mounted; Two groups of handling components distributed in an array are used to carry the workpieces and realize the loading and unloading of the workpieces; Place the tooling to carry the workpiece and drive the workpiece to rotate; Working assembly for threading a workpiece, comprising: A support rod is installed on the frame, and a fixing plate is installed on the top of the support rod; A sliding plate is slidably arranged on the support rod, and a movable plate is slidably arranged on the sliding plate; The movable plate is provided with a fixed block, and two sides of the fixed block are respectively provided with a first connecting groove and two slot holes communicating with the first connecting groove; A positioning plate is mounted on the fixing block, wherein the positioning plate is provided with a second connecting groove corresponding to the first connecting groove; An output motor is mounted on the positioning plate, and an output end of the output motor passes through the positioning plate; A first transmission gear is mounted on the output end of the output motor; a positioning rod rotatably disposed in one of the slots, wherein a second transmission gear is mounted on the positioning rod and meshes with the first transmission gear; a transmission rod rotatably disposed in another slot, wherein a third transmission gear is mounted on the transmission rod and meshes with the second transmission gear; The work head replacement kit is used to replace the threaded work head to match workpieces of different specifications, including: A connecting block, the top of which is mounted on the bottom of the transmission rod, and a connecting groove with one end passing through is defined in the connecting block; The mounting frame is detachably arranged with the connecting block, wherein a locking groove is provided in the mounting frame, and a guide groove is also provided in the mounting frame; A rolling wheel is installed at the bottom of the mounting frame; a locking block, slidably disposed in the connecting groove and adapted to cooperate with the locking groove; a driving block, slidably disposed in the connecting groove and configured to cooperate with the locking block; One end of the return spring is installed in the connecting groove, and the other end is connected to the top of the driving block to provide a force for the driving block.

2. A threading machine according to claim 1, characterized in that: A single set of the handling components includes: a first motor, providing driving force for the transport assembly; a first gear and a first rack meshing therewith, wherein the first gear is mounted on an output end of the first motor; a fixed frame, slidably disposed on the guide rail, one end of which is connected to the first rack; The swing arm member is rotatably mounted on the fixed frame; A clamping member, driven by an electric slide rail and mounted on one end of the swing arm member, wherein the clamping member is used to clamp a workpiece; a second motor mounted on the fixing frame, wherein an output end of the second motor extends and is connected to one end of the swing arm member; a first pulley mounted on an output end of the second motor; The second pulley is connected to the first pulley through the first synchronous belt, and the second pulley is installed on the clamping member.

3. A threading machine according to claim 1, characterized in that: The placement tooling includes: A fixed sleeve, mounted on the frame; A placing table is rotatably arranged on top of the fixed sleeve; The third motor is installed at the bottom of the fixing sleeve, and the output end of the third motor is connected to the bottom of the placement table.

4. A threading machine according to claim 3, characterized in that: The placement tool also includes: a fourth motor, mounted on the frame; a second gear and a second rack meshing therewith, wherein the second gear is mounted on an output end of the fourth motor; a sliding frame, slidably disposed on the guide rail, wherein one end of the sliding frame is connected to the second rack; The pressing block is rotatably arranged on the slide frame and is used for pressing the workpiece.

5. A threading machine according to claim 1, characterized in that: It also includes a placement component for placing a workpiece to be processed; The placement component includes: Side bracket, mounted on the rack; A positioning frame, slidably arranged on the side bracket; A support platform is rotatably mounted on the positioning frame, and a driven gear is mounted on the bottom of the support platform; Two sets of grippers, driven by air cylinders, are installed at both ends of the support platform; a fifth motor, mounted on the side bracket, with a driving gear mounted on its output end, the driving gear meshing with the driven gear; a sixth motor, mounted on the side bracket; a gear box mounted on the side bracket, one end of the gear box being connected to the output end of the sixth motor, and the other end of the gear box being mounted with a first slider; The first screw rod is threadedly connected to the first slider, the first screw rod passes through but does not contact the side bracket, and the top of the first screw rod is rotatably mounted on the support platform.

6. A threading machine according to claim 1, characterized in that: The working components also include: Two second screw rods are rotatably arranged on the fixed plate; a second slider, a thread being provided on the second screw rod, the second slider being mounted on the slide plate; Two third pulleys are respectively mounted on the two second screw rods, and the two third pulleys are driven by a second synchronous belt; A first drive motor is mounted on the fixed plate via a support block, wherein an output end of the first drive motor is connected to one of the second screw rods via a connecting sleeve; A third screw rod, on which a third slider is threadedly provided, and the third slider is installed at the bottom of the movable plate; The second drive motor is mounted on the slide plate through a side support block, and an output end of the second drive motor is connected to the third screw rod.

7. A threading machine according to claim 1, characterized in that: The working head replacement assembly also includes: A square rod is mounted in the connecting groove, and the driving block is slidably arranged on the square rod; An operating rod is mounted on one end of the driving block, and the operating rod is slidably disposed in the connecting groove; A compression spring, one end of which is installed in the connecting groove and the other end is connected to the locking block; A guide rod is integrated on the connecting block, and the guide rod is used to cooperate with the guide groove.

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