A desktop tapping machine for metal processing

Abstract

The application discloses a table tapping machine for metal machining and belongs to the technical field of machining. The tapping machine comprises a workbench, a storage box, a tapping mechanism, a clamping mechanism, a first driving mechanism and a pushing assembly driven by the first driving mechanism. The pushing assembly can continuously rotate around a horizontal axis, and a pushing unit of the pushing assembly comprises a baffle which can move radially and rotate around its own axis. On the workbench surface, a feeding station, a conversion station and a clamping station are sequentially arranged along a rotation track. During the pushing process of the workpiece, the baffle firstly pushes the workpiece horizontally at a gradually reduced pushing speed between the feeding station and the conversion station; when reaching the conversion station, the baffle is forced to contact the workbench surface to make the guide mechanism deflect, and the pushing speed is further reduced, so that the workpiece stably and slowly reaches the clamping station, and positioning inaccuracy caused by impact is effectively avoided; subsequently, the baffle rotates to a avoiding posture and is automatically reset under the action of magnetic force and spring.

Description

Technical Field

[0001] This invention belongs to the field of machining technology and relates to a benchtop tapping machine for metal processing. Background Technology

[0002] Benchtop tapping machines are widely used in thread machining of small metal workpieces (such as nuts, flanges, and connectors) due to their compact structure and ease of operation. To improve production efficiency, automatic workpiece feeding and positioning technology has become a key research focus.

[0003] Several automated feeding solutions already exist in the prior art. For example, Chinese invention patent publication number CN120516105A discloses a metal end cap tapping device. This device includes a feeding assembly that uses two feeding platforms to stack workpieces, and a rotatable arc-shaped push plate is set below the gap between the two feeding platforms. When the tapping mechanism descends, it drives the rack plate to move downward through the side plate, connecting piece, and straight telescopic rod. The rack plate meshes with the gear, driving the gear shaft and the arc-shaped push plate fixed thereon to rotate approximately 90 degrees. During the rotation, the inner wall of the arc-shaped push plate squeezes the bottom workpiece, pushing it horizontally out of the gap and directly onto the placement plate at the processing position. This pushing method relies on the linear component force generated by the rotational motion of the push plate to push the workpiece to the preset area in one go and continuously.

[0004] However, this type of direct pushing method has obvious drawbacks. Whether it is linear motion or rotary pushing, the workpiece often still has a high final velocity after leaving the pushing mechanism. When the workpiece reaches the positioning surface, such as the limit plate, stop, or another workpiece, it will impact due to inertia. This impact not only causes noise and component wear, but also causes the workpiece to bounce or deviate.

[0005] To address the above problems, this invention proposes a benchtop tapping machine for metal processing. Summary of the Invention

[0006] To address the problems existing in the background art, the present invention proposes a benchtop tapping machine for metal processing. It includes a worktable, a storage bin, a tapping mechanism, a clamping mechanism, a first drive mechanism, and a pushing assembly; the storage bin and the tapping mechanism are disposed above the worktable, the clamping mechanism is disposed on the worktable and located directly below the tapping mechanism, and the pushing assembly is driven by the first drive mechanism;

[0007] The feeding assembly can rotate continuously around a horizontal axis, and its rotation trajectory passes through the feeding station, the conversion station and the clamping station in sequence; wherein, the feeding station is located below the storage box, the clamping station is located at the clamping mechanism, and the conversion station is located between the feeding station and the clamping station.

[0008] The feeding assembly includes at least one feeding unit, the feeding unit includes a baffle, the baffle can move radially along the rotation direction of the feeding unit, and can rotate about the baffle's own axis;

[0009] During its revolution, the baffle performs the following actions in sequence: First, between the unloading station and the conversion station, the workpiece is pushed horizontally at a gradually decreasing pushing speed; then, at the conversion station, the pushing speed is further reduced so that the workpiece is pushed to the clamping station at a lower speed; subsequently, the baffle extends radially while rotating to an avoidance posture; finally, the baffle returns to its initial state.

[0010] Furthermore, the first driving mechanism includes: a first rotating shaft with its axis arranged in a horizontal direction; a connecting frame fixedly mounted on the workbench, on which the first rotating shaft is rotatably mounted; two connecting discs coaxially fixed on the first rotating shaft; and a third motor that drives the first rotating shaft to rotate via a gear pair.

[0011] Furthermore, the feeding assembly includes multiple feeding mechanisms, which are evenly distributed circumferentially along the first rotation axis; each feeding mechanism includes two feeding units, which are respectively located on two connecting discs.

[0012] Furthermore, the pushing unit includes: a connecting rod arranged radially along the connecting disc; a guide sleeve rotatably connected to the connecting rod, and a rotation damping and reset structure is provided at the rotatable connection between the guide sleeve and the connecting rod; a sliding shaft slidably sleeved inside the guide sleeve and rotatable about its own axis; and a baffle plate installed at the end of the sliding shaft. A guide groove is formed on the side wall of the guide sleeve, the guide groove including an axial section and a helical section; a guide rod is provided on the sliding shaft, the guide rod being slidably assembled within the guide groove.

[0013] Furthermore, the pushing unit also includes a limiting structure disposed between the guide sleeve and the sliding shaft. The limiting structure includes: an elastic positioning pin disposed on the sliding shaft; and a positioning hole disposed on the guide sleeve; when the sliding shaft rotates to an avoidance posture, the positioning pin engages in the positioning hole to fix the position of the sliding shaft.

[0014] Furthermore, a first magnet is provided on the side of the worktable; a second magnet is provided at the end of the positioning pin, and the second magnet has the same magnetism as the first magnet; when the pushing unit rotates to the reset position, the repulsive force between the first magnet and the second magnet drives the positioning pin to disengage from the positioning hole.

[0015] Furthermore, at the switching station, the bottom of the baffle contacts the worktable surface, causing the guide sleeve to deflect relative to the connecting rod, thereby further reducing the push.

[0016] Furthermore, the clamping mechanism includes: a bidirectional threaded rod driven by a second motor; and two clamping blocks threadedly engaged with the bidirectional threaded rod. The tapping mechanism includes: a tapping tool driven by a first motor; and a first electric telescopic rod controlling the axial feed of the tapping tool.

[0017] Furthermore, the bottom of the storage box is provided with a material-blocking mechanism. The material-blocking mechanism includes a first baffle and a second baffle, which can extend alternately to achieve the sequential and orderly release of multiple workpieces.

[0018] Furthermore, the pushing unit also includes a second spring connected between the guide sleeve and the sliding shaft, used to drive the sliding shaft and the baffle to reset after the limit is released.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting up a conversion station and a pusher unit structure, the moving speed of the workpiece is automatically reduced in the later stage of the push, which effectively avoids the workpiece hitting the positioning surface at high speed and reduces rebound and offset.

[0021] 2. The feeding unit integrates pushing, deceleration, avoidance, and reset functions. Deceleration is achieved by triggering the guide sleeve to deflect through contact between the baffle and the worktable; automatic rotation of the baffle for avoidance and reset is achieved using a spiral guide groove and magnetic unlocking mechanism. The entire process is synchronized with the rotation drive, resulting in a high degree of automation.

[0022] 3. The workpiece arrives smoothly at the clamping mechanism at a low speed and is reliably clamped at the theoretical machining center, providing a precise positioning basis for subsequent tapping and improving the quality and consistency of thread processing. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the connection between the tapping mechanism and the clamping mechanism of the present invention and the worktable;

[0025] Figure 3 This is a schematic diagram of the connection between the clamping block and the worktable in this invention;

[0026] Figure 4 This is a schematic diagram of the structure of the storage box of the present invention;

[0027] Figure 5 This is the present invention. Figure 4 A schematic diagram of the front sectional structure;

[0028] Figure 6 This is a schematic diagram of the connection between the feeding mechanism and the first driving mechanism of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the first driving mechanism of the present invention;

[0030] Figure 8 This is a schematic diagram of the material pushing structure of the present invention;

[0031] Figure 9 This is a schematic diagram of the material feeding unit of the present invention;

[0032] Figure 10 This is an exploded structural diagram of the feeding unit of the present invention;

[0033] Figure 11 This is a schematic diagram of the limiting structure of the present invention;

[0034] Figure 12 This is a partial cross-sectional structural diagram of the connection between the guide sleeve and the connecting rod of the present invention;

[0035] Figure 13 This is a schematic diagram of the motion process of the present invention.

[0036] In the diagram: 1. Workbench; 11. Guide groove; 12. First magnet; 13. Connecting frame; 2. Storage box; 21. Material blocking mechanism; 211. First baffle; 212. Second baffle; 213. Dual-output hydraulic cylinder; 3. Tapping mechanism; 31. First motor; 32. First electric telescopic rod; 33. Tapping cutter; 4. Clamping mechanism; 41. Second motor; 42. Bidirectional threaded rod; 43. First slider; 44. Clamping block; 5. First drive mechanism; 51. First rotating shaft; 52. Third motor; 53. First cylindrical gear; 54. Second cylindrical gear; 55. Connecting... 6. Feeding mechanism; 61. Guide sleeve; 611. Guide groove; 6111. First guide groove; 6112. Spiral guide groove; 612. Positioning hole; 62. Sliding shaft; 621. Guide rod; 622. Mounting bracket; 623. Rotating block; 63. Baffle; 631. Second rotating shaft; 632. First torsion spring; 64. Limiting structure; 641. First spring; 642. Positioning pin; 643. Second magnet; 644. Mounting blind hole; 65. Second spring; 66. Connecting rod; 661. Third rotating shaft; 662. Second torsion spring; 7. Workpiece. Detailed Implementation

[0037] 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.

[0038] like Figures 1 to 13 As shown, the present invention provides a benchtop tapping machine for metal processing, including a worktable 1, a storage box 2, a tapping mechanism 3, a clamping mechanism 4, a first driving mechanism 5, and a pushing assembly.

[0039] A vertical support rod is provided above the workbench 1. A horizontal support plate is fixed to the upper end of the support rod. The storage box 2 and the tapping mechanism 3 are mounted on this support plate.

[0040] The storage box 2 is used to vertically stack multiple workpieces 7. The storage box 2 is fixedly installed on the support plate and located on one side of the tapping mechanism 3. The bottom of the storage box 2 is open and there is a gap between it and the worktable 1 that allows a single workpiece 7 to pass through.

[0041] The tapping mechanism 3 is also mounted on the support plate, with its axis pointing vertically downwards. The clamping mechanism 4 is mounted on the worktable 1, directly below the tapping mechanism 3. The clamping mechanism 4 is used to fix the workpiece 7 to be processed.

[0042] A connecting frame 13 is fixedly installed on one side of the workbench 1, and the first drive mechanism 5 is installed on the connecting frame 13.

[0043] The feeding assembly is capable of continuous rotation around a horizontal axis. The feeding assembly includes multiple feeding mechanisms 6 driven by a first drive mechanism 5. The first drive mechanism 5 includes a first rotating shaft 51 whose axis is rotatably arranged in the front-rear direction. The feeding mechanism 6 rotates continuously along with the first rotating shaft 51, and the rotation trajectory of the feeding mechanism 6 passes over the surface of the worktable 1. Thus, the workpiece 7 is pushed from the area below the storage bin 2 to the clamping mechanism 4.

[0044] Specifically, such as Figure 13 As shown, the rotation trajectory passes sequentially through the feeding station (position B in the figure), the conversion station (position C in the figure), the clamping station (position D in the figure), and the reset station (position A in the figure). Among them, the feeding station is located below the storage box 2; the clamping station is located at the clamping mechanism 4 directly below the tapping mechanism 3; and the conversion station is located between the feeding station and the clamping station.

[0045] As a result, workpiece 7 is pushed from below storage box 2 to clamping mechanism 4.

[0046] Each set of pushing mechanisms 6 includes two pushing units. Each pushing unit includes a baffle 63, which can move radially along the rotation direction of the pushing unit and can rotate about its own axis.

[0047] As the pusher assembly rotates, the baffles 63 sequentially perform the following actions: First, between the unloading station and the transfer station, the ends of the two baffles 63 abut against each other to form a pusher plate structure, with a gap between the bottom of the baffles 63 and the worktable 1. The baffles 63 push the workpiece 7 horizontally at a gradually decreasing pushing speed. Next, when the baffles 63 contact the surface of the worktable 1, they reach the transfer station, further reducing the pushing speed, and continue pushing the workpiece 7 to the clamping station at a lower pushing speed. Then, the baffles 63 extend radially while rotating to the outside of the worktable 1, adopting a avoidance posture. Finally, the baffles 63 return to the state where the ends of the two baffles 63 abut against each other to form a pusher plate structure, preparing for the next push.

[0048] In the above process, between the feeding station and the changeover station, the pushing speed is the horizontal component of the linear velocity of the end of the baffle 63 as it moves in a circle around the first rotation axis 51. After the changeover station, the pushing speed is the instantaneous speed at which the end of the baffle 63, under the constraint of the worktable 1, pushes the workpiece 7 to move horizontally along the worktable surface.

[0049] like Figures 2 to 3 As shown, the clamping mechanism 4 includes a second motor 41, a bidirectional threaded rod 42, two first sliders 43, and two clamping blocks 44.

[0050] The second motor 41 is fixed on the worktable 1. The output shaft of the second motor 41 is connected to the bidirectional threaded rod 42. The axis of the bidirectional threaded rod 42 is horizontally arranged in the front-to-back direction. Two parallel guide grooves 11 are provided on the surface of the worktable 1. Two first sliders 43 are threadedly connected to the bidirectional threaded rod 42, and the internal threads of the two first sliders 43 are in opposite directions. Each first slider 43 is fixedly connected to a clamping block 44. The clamping block 44 is slidably connected to the guide groove 11. The second motor 41 is a bidirectional motor, used to drive the bidirectional threaded rod 42 to rotate in both directions, thereby controlling the two clamping blocks 44 to move towards or away from each other, so as to clamp or release the workpiece 7.

[0051] Specifically, when the workpiece 7 is fed between the two clamping blocks 44, the second motor 41 is started to drive the bidirectional threaded rod 42 to rotate, driving the two clamping blocks 44 to move in opposite directions along the guide groove 11 to clamp the workpiece 7. After the processing is completed, the second motor 41 drives the bidirectional threaded rod 42 to rotate in the opposite direction to release the workpiece 7.

[0052] The tapping mechanism 3 includes a first motor 31, a tapping cutter 33, and a first electric telescopic rod 32.

[0053] The first motor 31 is vertically fixed, and the body of the first electric telescopic rod 32 is fixedly connected to the output shaft of the first motor 31. The tapping tool 33 is coaxially fixed to the end of the output rod of the first electric telescopic rod 32. When the workpiece 7 is clamped, the first motor 31 and the first electric telescopic rod 32 are started. The first motor 31 drives the tapping tool 33 to rotate at high speed, while the first electric telescopic rod 32 controls the tapping tool 33 to perform axial feed, driving the tapping tool 33 to cut downward into the workpiece 7 to complete the tapping, and then retracts.

[0054] like Figure 4 and Figure 5 As shown, a material blocking mechanism 21 is installed on the side of the storage box 2 near the workbench 1 to control the sequential and orderly release of multiple workpieces 7.

[0055] The material blocking mechanism 21 includes a first baffle 211, a second baffle 212, and a dual-output hydraulic cylinder 213.

[0056] The first baffle 211 and the second baffle 212 are arranged parallel to each other vertically. The first baffle 211 and the second baffle 212 are horizontally slidably mounted on the side wall of the storage box 2. The dual-output hydraulic cylinder 213 is fixed on the storage box 2. The two output shafts of the dual-output hydraulic cylinder 213 extend and retract in opposite directions and are respectively connected to the first baffle 211 and the second baffle 212.

[0057] Initially, the first baffle 211 extends to support the entire stack of workpieces 7. At the start of a single unloading operation, the dual-output hydraulic cylinder 213 actuates, driving the first baffle 211 to retract horizontally away from the axis of the storage tank 2, while simultaneously driving the second baffle 212 to extend horizontally towards the axis of the storage tank 2. The retraction of the first baffle 211 causes the bottommost workpiece 7 to lose its support and fall vertically onto the worktable 1 under gravity. Simultaneously, the extension of the second baffle 212 inserts below the bottom surface of the second-to-last layer of workpieces 7, supporting all the workpieces 7 above it. Subsequently, the dual-output hydraulic cylinder 213 reverses its action, driving the first baffle 211 to extend while simultaneously driving the second baffle 212 to retract. The retraction of the second baffle 212 causes the entire stack of supported workpieces 7 to drop by the thickness of one workpiece, after which it is supported again by the first baffle 211, completing one unloading cycle.

[0058] like Figure 6 and Figure 7 As shown, the first drive mechanism 5 includes a third motor 52, a first cylindrical gear 53, a second cylindrical gear 54, a first rotating shaft 51, and two connecting discs 55.

[0059] The first rotating shaft 51 is horizontally rotatable on the connecting frame 13. Two connecting discs 55 are coaxially fixed on the first rotating shaft 51 and located on the front and rear sides of the connecting frame 13, respectively. The third motor 52 is fixed to the connecting frame 13. A first cylindrical gear 53 is coaxially fixed on the output shaft of the third motor 52, and a second cylindrical gear 54 is coaxially fixed on the first rotating shaft 51. The first cylindrical gear 53 and the second cylindrical gear 54 mesh. Starting the third motor 52 will drive the first rotating shaft 51 and the connecting discs 55 to rotate continuously through the gear pair.

[0060] like Figure 6 As shown, the feeding assembly includes multiple feeding mechanisms 6. The multiple feeding mechanisms 6 are evenly distributed circumferentially along the first rotation axis 51.

[0061] Each pusher mechanism 6 includes two pusher units, each pusher unit corresponds one-to-one with the connecting plate 55 and is installed on the corresponding side of the connecting plate 55.

[0062] Specifically, such as Figures 8 to 12 As shown, each feeding unit is fixedly connected to the connecting plate 55 via a connecting rod 66 arranged radially along the connecting plate 55.

[0063] Each feeding unit includes a guide sleeve 61, a sliding shaft 62, and a baffle 63.

[0064] A third rotating shaft 661 is fixedly mounted on the end of the connecting rod 66 away from the axis of the connecting plate 55. The axis of the third rotating shaft 661 is perpendicular to the axis of the connecting rod 66. The guide sleeve 61 is rotatably connected to the third rotating shaft 661 via a second torsion spring 662. One end of the second torsion spring 662 is fixed to the guide sleeve 61, and the other end is fixed to the third rotating shaft 661. The second torsion spring 662 provides a restoring torque for the swing of the guide sleeve 61 around the third rotating shaft 661, giving it a tendency to automatically reset. When the baffle 63 is not in contact with the worktable 1, the second torsion spring 662 keeps the guide sleeve 61 and the connecting rod 66 coaxial. The second torsion spring 662 ensures that the baffle 63 can horizontally push the workpiece 7 between the feeding station and the transfer station.

[0065] Furthermore, a rotational damping mechanism is installed between the third rotating shaft 661 and the guide sleeve 61. After the push is completed and the baffle 63 is not in contact with the worktable 1, the guide sleeve 61 can be slowly reset under the combined action of the rotational damping and the second torsion spring 662.

[0066] The axis of the guide sleeve 61 and the axis of the sliding shaft 62 are always parallel. The sliding shaft 62 is slidably sleeved in the guide sleeve 61 and can rotate around its own axis.

[0067] To achieve precise guidance, such as Figure 9 and Figure 10 As shown, a guide groove 611 is formed on the side wall of the guide sleeve 61. The guide groove 611 consists of a first guide groove 6111 extending axially along the guide sleeve 61 and a spiral guide groove 6112 communicating with the end of the first guide groove 6111. A guide rod 621 perpendicular to its axis is fixed on the sliding shaft 62. The guide rod 621 is slidably fitted into the guide groove 611, thereby controlling the movement trajectory of the sliding shaft 62.

[0068] like Figure 11 As shown, a rotating block 623 is rotatably mounted on one end of the sliding shaft 62 near the connecting rod 66. A second spring 65 is also coaxially mounted inside the guide sleeve 61. One end of the second spring 65 is fixed inside the guide sleeve 61, and the other end is connected to the rotating block 623. The second spring 65 provides an inward restoring force for the sliding shaft 62.

[0069] The baffle 63 is mounted on the outer end of the sliding shaft 62 via a mounting bracket 622. Specifically, a second rotating shaft 631 is fixed to the baffle 63, and the second rotating shaft 631 is rotatably connected to the mounting bracket 622. A first torsion spring 632 is sleeved on the second rotating shaft 631, and both ends of the first torsion spring 632 are fixedly connected to the second rotating shaft 631 and the mounting bracket 622, respectively. This rotatable connection structure allows the baffle 63 to adaptively swing around the second rotating shaft 631. When the baffle 63 pushes the workpiece 7 forward, the contact surface of the baffle 63 can naturally match the surface shape of the workpiece 7 and maintain stable contact. Furthermore, this structure allows the baffle 63 to maintain a suitable contact angle with the workpiece 7 during the pushing process.

[0070] like Figure 11 and Figure 12 As shown, a limiting structure 64 is provided to further control the state of the sliding shaft 62 at a specific position. This limiting structure 64 includes a first spring 641 and a locating pin 642. A radially arranged mounting blind hole 644 is formed on the sliding shaft 62. The locating pin 642 is slidably mounted within the mounting blind hole 644, and the first spring 641 is mounted within the mounting blind hole 644. One end of the first spring 641 is fixedly mounted to the bottom of the mounting blind hole 644, and the other end of the first spring 641 is fixed to the locating pin 642. A locating hole 612 is formed on the side wall of the guide sleeve 61.

[0071] When the sliding shaft 62 moves to the end of the spiral guide groove 6112 by the guide rod 621, the positioning pin 642 extends and engages with the positioning hole 612 under the elastic force of the first spring 641, thereby locking the sliding shaft 62 in the current position.

[0072] To unlock the above, such as Figure 1 and Figure 11As shown, a second magnet 643 is fixedly installed at the end of the locating pin 642 away from the axis of the sliding shaft 62. Two first magnets 12 are fixedly installed at the end of the worktable 1 away from the tapping mechanism 3, and the two first magnets 12 are arranged symmetrically about the worktable 1. The axial distance between the two connecting rods 66 in the same set of pushing mechanisms 6 is greater than the width of the worktable 1 in the front-back direction, which makes the connecting rods 66 and the pushing unit located outside the worktable 1. The magnetic poles of the first magnets 12 near the corresponding side connecting rods 66 are the same as the magnetic poles of the second magnets 643 near the end of the worktable 1, and they generate a repulsive force against each other.

[0073] Since the first magnet 12 and the second magnet 643 have the same magnetism on adjacent sides, when the locked pusher unit rotates with the connecting disc 55 until the second magnet 643 and the first magnet 12 are facing each other, the magnetic repulsion will push the positioning pin 642 to compress the first spring 641 and retract, thereby disengaging from the positioning hole 612 and unlocking.

[0074] The feeding assembly's workflow includes four consecutive stages: feeding, speed conversion, clamping preparation, and mechanism reset, which are automatically completed through the mechanical movement of the feeding mechanism 6 in conjunction with magnetic force.

[0075] At the unloading station, the ends of two baffles 63 in the same set of pushing mechanisms 6 abut against each other, forming an integral pushing plate structure. At this time, the axes of the guide sleeve 61, the sliding shaft 62, and the connecting rod 66 are on the same straight line. When the pushing assembly starts to move, the pushing plate pushes the workpiece 7 from the unloading station to the conversion station at a gradually decreasing pushing speed. During this process, the workpiece 7 is steadily pushed forward at a relatively high average pushing speed.

[0076] When workpiece 7 enters the conversion station, the bottom end of baffle 63 contacts the upper surface of worktable 1, providing a mechanical basis for subsequent speed conversion.

[0077] As workpiece 7 moves from the conversion station to the clamping station, the connecting plate 55 drives the connecting rod 66 to continue rotating. However, due to the obstruction of the baffle 63 by the surface of the worktable 1, the baffle 63, sliding shaft 62, and guide sleeve 61 can no longer rotate synchronously with the connecting rod 66. This relative motion forces the guide sleeve 61 to swing counterclockwise relative to the connecting rod 66 with the third rotation axis 661 as the fulcrum, resulting in a change in the axial angle between the connecting rod 66 and the guide sleeve 61. This change in geometric relationship further reduces the moving speed of workpiece 7 at this stage, achieving an automatic reduction in the pushing speed during the pushing process.

[0078] When workpiece 7 is pushed to the junction of the first guide groove 6111 and the spiral guide groove 6112 by the guide rod 621, the continuous rotation of the connecting disc 55 causes the guide sleeve 61 to continue sliding relative to the sliding shaft 62. Guided by the spiral guide groove 6112, the sliding shaft 62 begins to rotate, causing the two baffles 63 to rotate in a direction away from each other, and rotate 90 degrees around the axis of the sliding shaft 62, eventually rotating completely to the outer sides of the worktable 1. At this time, the baffles 63 are in a clearance posture. At this time, the positioning pin 642 of the limiting structure 64 springs into the positioning hole 612 under the action of the first spring 641, locking the sliding shaft 62 and the clearance posture baffles 63 in this position.

[0079] As the connecting rod 66 revolves, the pushing unit gradually moves out of the "clamping station". Since the connecting rod 66 is installed on the front and rear sides of the worktable 1, when the baffle 63 rotates 90 degrees around the axis of the sliding shaft 62, its bottom end is already outside the worktable surface. However, during the pushing phase, the obstruction of the baffle 63 by the surface of the worktable 1 forces the guide sleeve 61 to swing around the third rotation axis 661, and causes the second torsion spring 662 to accumulate restoring torque.

[0080] When the connecting rod 66 revolves to the position away from the clamping station, the restoring torque of the second torsion spring 662 drives the guide sleeve 61 to swing back to the initial position around the third rotation axis 661. At the same time, the rotation damper located at the connection between the third rotation axis 661 and the guide sleeve 61 starts to work, slowing down the swing speed and ensuring a smooth and shock-free reset action.

[0081] Under the restoring torque of the second torsion spring 662 and the buffering effect of rotational damping, the guide sleeve 61 gradually swings back until its axis coincides with the axis of the connecting rod 66 again, returning to the same straight line state, preparing for the next pushing cycle.

[0082] When the connecting plate 55 drives the pushing mechanism 6 to rotate until the second magnet 643 is directly opposite the first magnet 12 fixed at the end of the worktable 1, the repulsive force generated by the two magnets with the same poles overcomes the elastic force of the first spring 641, pushing the positioning pin 642 away from the positioning hole 612 and releasing the lock. Subsequently, under the contraction pull of the second spring 65, the sliding shaft 62 first drives the baffle 63 to rotate from a 90-degree position, and then retracts into the guide sleeve 61. At the same time, with the assistance of the first torsion spring 632, the baffles 63 finally return to the opposing state at the ends, and the entire pushing unit resets, preparing for the next pushing cycle.

[0083] The specific usage process is as follows: The dual-output hydraulic cylinder 213 of the material blocking mechanism 21 is activated, driving the first baffle 211 to retract horizontally, while the second baffle 212 extends horizontally, causing the bottommost workpiece 7 to fall vertically onto the worktable 1. The second baffle 212 then inserts into the bottom of the upper workpiece 7 to support it. Subsequently, the dual-output hydraulic cylinder 213 reverses its action, driving the first baffle 211 to extend while the second baffle 212 retracts. The entire stack of workpieces 7 descends by one workpiece thickness and is then supported again by the first baffle 211.

[0084] The third motor 52 of the first drive mechanism 5 starts, driving the first rotating shaft 51 to rotate continuously, which in turn drives multiple sets of pushing mechanisms 6 to revolve around the shaft. When a set of pushing mechanisms 6 rotates to the pushing start position, its two baffles 63 horizontally abut against each other to form a rigid pushing rod; the rotating baffles 63 contact and push the workpiece 7 on the worktable 1 to move horizontally towards the clamping mechanism 4, completing the initial pushing.

[0085] At the unloading station, the ends of two baffles 63 in the same set of pushing mechanisms 6 abut against each other, forming an integral pushing plate structure. At this time, the axes of the guide sleeve 61, the sliding shaft 62, and the connecting rod 66 are on the same straight line. When the pushing assembly starts to move, the pushing plate pushes the workpiece 7 from the unloading station to the conversion station at a gradually decreasing pushing speed. During this process, the workpiece 7 is pushed forward at a higher pushing speed.

[0086] When workpiece 7 enters the conversion station, the bottom end of baffle 63 contacts the upper surface of worktable 1, providing a mechanical basis for subsequent speed conversion.

[0087] As workpiece 7 moves from the conversion station to the clamping station, the connecting plate 55 drives the connecting rod 66 to continue rotating. However, due to the obstruction of the baffle 63 by the surface of the worktable 1, the baffle 63, sliding shaft 62, and guide sleeve 61 can no longer rotate synchronously with the connecting rod 66. This relative motion forces the guide sleeve 61 to swing counterclockwise relative to the connecting rod 66 with the third rotation axis 661 as the fulcrum, resulting in a change in the axial angle between the connecting rod 66 and the guide sleeve 61. This change in geometric relationship further reduces the pushing speed of workpiece 7 at this stage, achieving automatic deceleration of the pushing process.

[0088] When workpiece 7 is pushed to the junction of the first guide groove 6111 and the spiral guide groove 6112 by the guide rod 621, the continuous rotation of the connecting disc 55 causes the guide sleeve 61 to continue sliding relative to the sliding shaft 62. Guided by the spiral guide groove 6112, the sliding shaft 62 begins to rotate, causing the two baffles 63 to rotate in a direction away from each other, and rotate 90 degrees around the axis of the sliding shaft 62. Finally, the two baffles 63 are completely rotated to the outer sides of the worktable 1. At this time, the baffles 63 are in a avoidance posture. At the same time, the positioning pin 642 of the limiting structure 64 springs into the positioning hole 612 under the action of the first spring 641, locking the sliding shaft 62 and the baffles 63 in the avoidance posture at this position.

[0089] When the connecting disc 55 drives the pushing mechanism 6 to rotate until the second magnet 643 is directly opposite the first magnet 12 fixed at the end of the worktable 1, the repulsive force generated by the two magnets with the same poles overcomes the elastic force of the first spring 641, pushing the positioning pin 642 away from the positioning hole 612 and releasing the lock. Subsequently, under the contraction pull of the second spring 65, the sliding shaft 62 first drives the baffle 63 to rotate back from the 90-degree rotation state, and then retracts into the guide sleeve 61. At the same time, with the assistance of the first torsion spring 632, the ends of the two baffles 63 finally return to the opposing state, and the entire pushing unit resets, preparing for the next pushing cycle.

[0090] The second motor 41 of the clamping mechanism 4 starts, driving the bidirectional threaded rod 42 to rotate, which in turn drives the two clamping blocks 44 to move in opposite directions along the guide groove 11 to clamp the workpiece 7. The first motor 31 and the first electric telescopic rod 32 of the tapping mechanism 3 start. The first motor 31 drives the tapping cutter 33 to rotate at high speed, while the first electric telescopic rod 32 drives the tapping cutter 33 to feed downwards into the workpiece 7 to complete the tapping, and then retracts.

[0091] After tapping is completed, the second motor 41 drives the bidirectional thread rod 42 to rotate in the opposite direction, driving the two clamping blocks 44 to move in opposite directions along the guide groove 11 to release the workpiece 7.

[0092] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A benchtop tapping machine for metal processing, comprising a worktable (1), a storage bin (2), a tapping mechanism (3), a clamping mechanism (4), a first driving mechanism (5), and a pushing assembly, wherein the storage bin (2) and the tapping mechanism (3) are disposed above the worktable (1), the clamping mechanism (4) is disposed on the worktable (1) and located directly below the tapping mechanism (3), and the pushing assembly is driven by the first driving mechanism (5), characterized in that: The pushing assembly can rotate continuously around a horizontal axis, and its rotation trajectory passes through the unloading station, the conversion station and the clamping station in sequence. The unloading station is located below the storage box (2), the clamping station is located at the clamping mechanism (4), and the conversion station is located between the unloading station and the clamping station. The pushing assembly includes at least one pushing unit, and the pushing unit includes a baffle (63). The baffle (63) can move radially along the rotation direction of the pushing unit and can rotate around its own axis. The baffle (63) performs the following actions in sequence during its revolution: First, between the unloading station and the conversion station, the baffle (63) pushes the workpiece (7) horizontally at a gradually decreasing pushing speed. Then, at the conversion station, the pushing speed of the baffle (63) is further reduced, so that the workpiece (7) reaches the clamping station at a low speed. Subsequently, the baffle (63) extends radially and rotates to a avoidance posture. Finally, the baffle (63) returns to its initial state. The first drive mechanism (5) includes: a first rotating shaft (51), the axis of which is arranged in the horizontal direction; The feeding assembly includes multiple feeding mechanisms (6), which are evenly distributed circumferentially along the first rotating axis (51); each feeding mechanism (6) includes two feeding units, which are symmetrically arranged and located on two connecting plates (55) respectively. The feeding unit includes: a connecting rod (66) arranged radially along the connecting disc (55); a guide sleeve (61) rotatably connected to the connecting rod (66), and a rotation damping and reset structure is provided at the rotatable connection between the guide sleeve (61) and the connecting rod (66); a sliding shaft (62) slidably sleeved in the guide sleeve (61) and rotatable around its own axis; and a baffle (63) installed at the end of the sliding shaft (62); a guide groove (611) is provided on the side wall of the guide sleeve (61), the guide groove (611) includes an axial section and a spiral section; a guide rod (621) is provided on the sliding shaft (62), the guide rod (621) is slidably assembled in the guide groove (611).

2. The benchtop tapping machine for metal processing according to claim 1, characterized in that: A connecting frame (13) is fixedly installed on the workbench (1), and the first rotating shaft (51) is rotatably installed on the connecting frame (13); two connecting discs (55) are coaxially fixed on the first rotating shaft (51); And a third motor (52) drives the first rotating shaft (51) to rotate via a gear pair.

3. The benchtop tapping machine for metal processing according to claim 1, characterized in that: The feeding unit also includes a limiting structure (64) located between the guide sleeve (61) and the sliding shaft (62); the limiting structure (64) includes: an elastic positioning pin (642) slidably mounted on the sliding shaft (62); a positioning hole (612) is provided on the guide sleeve (61); when the sliding shaft (62) rotates to the avoidance posture, the positioning pin (642) is engaged in the positioning hole (612) to fix the position of the sliding shaft (62).

4. The benchtop tapping machine for metal processing according to claim 3, characterized in that: The workbench (1) is provided with a first magnet (12) on its side; the end of the positioning pin (642) is provided with a second magnet (643), the second magnet (643) and the first magnet (12) have the same magnetism; when the pusher unit rotates to the reset position, the repulsive force between the first magnet (12) and the second magnet (643) drives the positioning pin (642) to disengage from the positioning hole (612).

5. The benchtop tapping machine for metal processing according to claim 1, characterized in that: At the switching station, the bottom of the baffle (63) contacts the worktable (1) surface, causing the guide sleeve (61) to deflect relative to the connecting rod (66), thereby reducing the pushing speed.

6. The benchtop tapping machine for metal processing according to claim 1, characterized in that: The clamping mechanism (4) includes: a bidirectional threaded rod (42) driven by a second motor (41); and two clamping blocks (44) threadedly engaged with the bidirectional threaded rod (42); the tapping mechanism (3) includes: a tapping cutter (33) driven by a first motor (31); and a first electric telescopic rod (32) controlling the axial feed of the tapping cutter (33).

7. The benchtop tapping machine for metal processing according to claim 1, characterized in that: The bottom of the storage box (2) is provided with a baffle mechanism (21); the baffle mechanism (21) includes a first baffle (211) and a second baffle (212), the first baffle (211) and the second baffle (212) can extend alternately to realize the sequential and orderly release of multiple workpieces (7).

8. The benchtop tapping machine for metal processing according to claim 1, characterized in that: The feeding unit also includes a second spring (65), which is connected between the guide sleeve (61) and the sliding shaft (62) and is used to drive the sliding shaft (62) and the baffle (63) to reset after the limit is released.

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