High-reliability round nut full-automatic tapping equipment

Abstract

The invention relates to the technical field of nut machining, in particular to high-reliability round nut full-automatic tapping equipment which comprises a workbench, a main shaft, a clamping mechanism and a jacking mechanism. The main shaft is rotatably arranged on the workbench, and a bent handle screw tap is arranged in the main shaft; the bent handle screw tap comprises a horizontal section and a bent section which are sequentially connected, the horizontal section and the main shaft are coaxially arranged, a telescopic threaded conical head is arranged at the end of the horizontal section, and the end of the bent section extends out in the radial direction of the main shaft; the clamping mechanism is cylindrical, is horizontally arranged along the axis of the clamping mechanism and is used for clamping a nut to be tapped; the jacking mechanism is telescopically arranged at the end, away from the threaded conical head, of the clamping mechanism and used for pushing the nut to abut against the threaded conical head stretching into the clamping mechanism. According to the scheme, the telescopic threaded conical head is arranged, in the tapping process, the nut is kept static, and the threaded conical head rotates and is fed, so that relative movement between the nut and the clamping mechanism is avoided, and the risk that the outer surface of the nut is abraded is reduced.

Description

Technical Field

[0001] This invention relates to the field of nut processing technology, and in particular to a highly reliable fully automatic tapping device for round nuts. Background Technology

[0002] When using a bent-shank tap to automatically tap round nuts, a sufficiently large clamping force must be applied to the nut to achieve the desired tapping effect. During the tapping process, the tap rotates and feeds, and a large clamping force ensures that the round nut remains stable, preventing it from deflecting synchronously with the tap's movement, thereby guaranteeing the accuracy and quality of the tapping.

[0003] To improve tapping efficiency, existing technologies often employ automated tapping processes, requiring the round nut to move backward relative to the tap and clamping components during tapping. However, during this movement, the round nut is subjected to significant clamping force, making its outer surface highly susceptible to wear. This not only affects the nut's appearance but also negatively impacts its performance. Regarding existing bent-shank taps, their inherent structural and design limitations make it difficult to provide sufficient clamping force to stabilize the nut while effectively preventing wear during movement, thus failing to achieve both effective and virtually wear-free clamping of the round nut. Summary of the Invention

[0004] The purpose of this invention is to reduce the risk of wear on the outer surface of the nut during the tapping process.

[0005] Specifically, this invention provides a highly reliable fully automatic tapping device for round nuts, comprising: a worktable, a spindle, a clamping mechanism, and a tightening mechanism; the spindle is rotatably mounted on the worktable, and a bent shank tap is disposed inside the spindle; the bent shank tap includes a horizontal section and a curved section connected in sequence, the horizontal section and the spindle are coaxially arranged, and the end of the horizontal section is provided with a retractable threaded cone, and the end of the curved section extends radially along the spindle; the clamping mechanism is cylindrical and horizontally arranged along its axis, used to clamp the nut to be tapped; the tightening mechanism is retractably disposed at the end of the clamping mechanism away from the threaded cone, used to push the nut against the threaded cone extending into the clamping mechanism.

[0006] Furthermore, the clamping mechanism includes a cylindrical housing and a plurality of metal springs evenly distributed circumferentially on the inner wall of the housing. The length direction of the metal springs is parallel to the axis of the housing, and the metal springs are inclined from the outside to the inside along the radial direction of the housing. The inclination direction of the metal springs is opposite to the rotation direction of the threaded cone.

[0007] Furthermore, the width of the metal shrapnel remains constant in the middle, gradually narrowing from the middle edge towards both ends.

[0008] Furthermore, a countersunk hole is provided at one end of the threaded cone facing the horizontal section, and a sliding rod extending into the countersunk hole is provided at the other end of the horizontal section facing the threaded cone. A through groove is provided in the middle section of the sliding rod, and a sliding head protruding radially is provided at the end of the sliding rod. A pin is provided on the threaded cone that passes radially through the countersunk hole and the through groove. A compression spring is sleeved on the sliding rod, with one end of the compression spring abutting against the sliding head and the other end abutting against the pin.

[0009] Furthermore, the high-reliability fully automatic tapping equipment for round nuts also includes: a motor, a first support, a first slide rail, and a first cylinder; the motor is connected to the main shaft and is used to drive the main shaft to rotate the bent shank tap; the first support is set on the worktable; the first slide rail is set on the first support, and a first slider is set on the first slide rail, and the first slider is connected to a movable frame; the movable frame is fixedly sleeved on the main shaft; the first cylinder is set on the first support and fixedly connected to the first slider, and is used to drive the first slider to move the movable frame and the main shaft in the horizontal direction, so that the main shaft moves closer to or away from the clamping mechanism.

[0010] Furthermore, the high-reliability fully automatic tapping equipment for round nuts also includes: a second slide rail, a second bracket, and a second cylinder; the second slide rail is set on the worktable, and a matching second slider is set on the second slide rail, with a mounting plate and mounting bracket on the second slider, and a clamping mechanism set on the mounting bracket; the second bracket is set on the worktable; the second cylinder is set on the second bracket and fixedly connected to the second slider, used to drive the second slider to move along the second slide rail, so that the clamping mechanism is opposite to or offset from the main shaft.

[0011] Furthermore, the spindle sleeve is equipped with a volute, and a discharge port is provided below the volute to discharge the tapped nuts to the bottom of the worktable.

[0012] Furthermore, the tightening mechanism includes: a third cylinder and a telescopic column; the third cylinder is connected to the mounting bracket via a stud; the telescopic column is connected to the third cylinder and extends into the housing under the drive of the third cylinder to push the nut to be tapped.

[0013] Furthermore, air holes are provided on the housing in the area away from the threaded taper. The gas blown out of the air holes blows the waste generated by tapping out from the end of the housing near the threaded taper.

[0014] Furthermore, the high-reliability fully automatic tapping equipment for round nuts also includes: a feeding bin; the feeding bin is vertically installed above the housing and connected to the housing, used to store and feed nuts to be tapped to the housing; the size of the feeding bin is adapted to the nuts, and the feeding bin has slots on both sides.

[0015] The beneficial effects of this invention are: The high-reliability fully automatic tapping equipment for round nuts of the present invention, by setting a retractable threaded cone on the bent shank tap, keeps the nut stationary under the action of the clamping mechanism during the tapping process, while the threaded cone rotates and feeds, thereby avoiding relative movement between the nut and the clamping mechanism, thus reducing the risk of wear on the outer surface of the nut, improving the appearance of the nut, and ensuring the performance of the nut.

[0016] Furthermore, the high-reliability fully automatic tapping device for round nuts of the present invention, by setting a vortex-distributed metal spring on the inner wall of the clamping mechanism housing, and setting the rotation direction of the threaded cone head and the inclination direction of the metal spring head from the outside to the inside, ensures that during the tapping process, the nut attempts to rotate in the opposite direction to the inclination direction of the metal spring head, thereby improving the clamping effect of the metal spring head on the nut and ensuring that the nut remains stationary during the tapping process. Before and after the threaded cone head begins tapping, the rotational torque applied to the nut by the threaded cone head disappears, the metal spring head returns to its original position, and the clamping force on the nut decreases. At the same time, since the width of the metal spring head gradually narrows from the middle edge to both ends, the clamping force on the nut is very small during the movement of the nut relative to the clamping mechanism, thereby greatly reducing the risk of wear and scratches on the outer surface of the nut. Attached Figure Description

[0017] The following sections will describe some specific embodiments of the invention in a detailed manner, by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. In the drawings: Figure 1 This is a schematic diagram of a highly reliable fully automatic tapping device for round nuts according to an embodiment of the present invention; Figure 2 This is a top view schematic diagram of a high-reliability fully automatic tapping device for round nuts according to an embodiment of the present invention; Figure 3 It is along Figure 2 A schematic cross-sectional view taken by the cutting line AA in the diagram; Figure 4 yes Figure 3 A schematic enlarged view of region C in the middle; Figure 5 yes Figure 4 A schematic diagram of the structure when the tap begins tapping; Figure 6 It is along Figure 2 A schematic cross-sectional view taken by the cutting line BB in the diagram; Figure 7 yes Figure 6 A schematic enlarged view of region D in the middle.

[0018] in: 100. Workbench; 110. First support; 120. First slide rail; 130. First slider; 131. Moving frame; 140. First cylinder; 150. Second slide rail; 160. Second slider; 161. Mounting plate; 162. Mounting frame; 170. Second support; 180. Second cylinder; 190. Support leg; 200. Spindle; 210. Motor; 220. Volute housing; 221. Discharge port; 222. Guide channel; 300. Bent shank tap; 310. 311. Horizontal section; 312. Sliding rod; 313. Through groove; 314. Sliding head; 315. Compression spring; 320. Bending section; 330. Threaded cone head; 331. Countersunk hole; 332. Pin; 333. Unloading groove; 400. Clamping mechanism; 410. Housing; 411. Air blowing hole; 420. Metal spring; 430. End cap; 500. Tightening mechanism; 510. Third cylinder; 511. Stud; 520. Telescopic column; 600. Feeding bin; 610. Slotting. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] The terms "first" and "second" used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically stated, this indicates that other features are not excluded and may be further included.

[0021] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] The following reference Figures 1 to 7 This invention describes a highly reliable fully automatic tapping device for round nuts.

[0023] A high-reliability fully automatic tapping machine for round nuts generally includes: a worktable 100, a spindle 200, a clamping mechanism 400, and a tightening mechanism 500. The spindle 200 is rotatably mounted on the worktable 100, and a bent shank tap 300 is disposed within the spindle 200. The bent shank tap 300 includes a horizontal section 310 and a bent section 320 connected in sequence. The horizontal section 310 and the spindle 200 are coaxially arranged, and the end of the horizontal section 310 is provided with a retractable threaded tap 330. The end of the bent section 320 extends radially along the spindle 200. The clamping mechanism 400 is cylindrical and horizontally arranged along its axis, used to clamp the nut to be tapped. The tightening mechanism 500 is retractably disposed at the end of the clamping mechanism 400 away from the threaded tap 330, used to push the nut against the threaded tap 330 extending into the clamping mechanism 400.

[0024] In this embodiment, by setting a retractable threaded cone 330 on the bent shank tap 300, the nut remains stationary under the action of the clamping mechanism 400 during the tapping process, while the threaded cone 330 rotates and feeds. This avoids relative movement between the nut and the clamping mechanism 400 during the tapping process, thereby reducing the risk of wear on the outer surface of the nut, improving the aesthetics of the nut, and ensuring the performance of the nut.

[0025] like Figure 3 As shown, a channel adapted to the shape of the bent shank tap 300 is formed within the spindle 200, and the size of the channel is adapted to the size of the nut to ensure that the nut can smoothly pass through the spindle 200 when moving along the bent shank tap 300. When the bent shank tap 300 is installed into the spindle 200, several nuts can be fitted on the horizontal section 310 of the bent shank tap 300 to ensure that the axis of the horizontal section 310 and the axis of the spindle 200 are collinear after the bent shank tap 300 is installed into the spindle 200.

[0026] In some embodiments, the spindle 200 may be composed of two symmetrical parts (symmetrical about the plane containing the axis of the bent shank tap 300) to facilitate the installation of the bent shank tap 300.

[0027] The clamping mechanism 400 includes a cylindrical housing 410 and a plurality of metal springs 420 evenly distributed circumferentially on the inner wall of the housing 410. The length direction of the metal springs 420 is parallel to the axis of the housing 410, and the metal springs 420 are inclined from the outside to the inside along the radial direction of the housing 410. The inclination direction of the metal springs 420 is opposite to the rotation direction of the threaded taper 330.

[0028] like Figure 4 , Figure 7As shown, a plurality of vortex-distributed metal springs 420 are arranged on the inner wall of the cylindrical shell 410, and the inclination direction of the metal springs 420 from the outside to the inside is opposite to the rotation direction of the threaded taper 330. After the threaded taper 330 contacts the nut to be tapped, the nut rotates under the drive of the rotating threaded taper 330, causing the metal springs 420 to be compressed and deformed away from the inclination direction, thereby increasing the friction between the nut and the metal springs 420. After the friction between the nut and the metal springs 420 increases to a level sufficient to counteract the torque applied to the nut by the threaded taper 330, the nut remains stationary relative to the metal springs 420. As the threaded taper 330 continues to rotate, it will tap the hole wall of the nut and move relative to the nut.

[0029] In this embodiment, by setting multiple vortex-distributed metal springs 420, the deformation of the metal springs 420 is used to clamp the nut. After the clamping force applied by the metal springs 420 to the nut is sufficient to counteract the force applied by the threaded cone 330 to the nut, the metal springs 420 and the nut remain stationary. This ensures the clamping effect of the nut and avoids damage to the nut surface caused by excessive clamping force applied by the clamping mechanism 400.

[0030] After the threaded tap 330 completes tapping, that is, after the threads on the threaded tap 330 have completely passed through the nut, the force exerted on the nut by the threaded tap 330 disappears. At this time, the metal spring 420 returns to its original position, and the clamping force exerted on the nut by the metal spring 420 decreases. Subsequently, the nut disengages from the housing 410 and the metal spring 420 under the action of the retracted threaded tap 330. Because the clamping force exerted on the nut by the metal spring 420 is reduced, the risk of wear when the nut moves relative to the metal spring 420 is reduced.

[0031] In some embodiments, a rubber layer may be attached to the surface of the metal spring 420, which further increases the coefficient of friction between the metal spring 420 and the nut while reducing the risk of wear on the outer surface of the nut. In some embodiments, an end cap 430 may be provided at the end of the housing 410 facing the spindle 200, and the end cap 430 is located between the housing 410 and the spindle 200. A through hole is provided at the center of the end cap 430, and the size of the through hole is adapted to the size of the nut, so that after the nut is disengaged from the housing 410, it transitions to the horizontal section 310 under the support of the end cap 430.

[0032] The width of the metal shrapnel 420 remains constant in the middle, gradually narrowing from the middle edge to both ends.

[0033] In this embodiment, the width of the metal spring 420 is constant in the middle and gradually narrows towards both ends from the middle edge. This design allows the nut to move more smoothly when contacting and disengaging from the metal spring 420 as it moves axially within the housing 410. Furthermore, it reduces the clamping force on the nut relative to the housing 410 in areas other than the middle region of the metal spring 420, thereby lowering the risk of wear and scratches on the nut's outer surface. The metal spring 420 has the largest width in the middle, resulting in the greatest clamping force applied to the nut, thus ensuring effective clamping during tapping.

[0034] A countersunk hole 331 is provided at one end of the threaded cone 330 facing the horizontal section 310. A sliding rod 311 extending into the countersunk hole 331 is provided at the other end of the horizontal section 310 facing the threaded cone 330. A through groove 312 is provided in the middle section of the sliding rod 311, and a radially protruding sliding head 313 is provided at the end of the sliding rod 311. A pin 332 is provided on the threaded cone 330, which passes radially through the countersunk hole 331 and the through groove 312. A compression spring 314 is sleeved on the sliding rod 311. One end of the compression spring 314 abuts against the sliding head 313, and the other end abuts against the pin 332.

[0035] In this embodiment, a countersunk hole 331 is provided at one end of the threaded taper 330 facing the horizontal section 310, and a sliding rod 311 extending into the countersunk hole 331 is provided at the other end of the horizontal section 310 facing the threaded taper 330, allowing the threaded taper 330 to move relative to the sliding rod 311. A through groove 312 is provided in the middle section of the sliding rod 311, and a pin 332 is provided on the threaded taper 330 that passes radially through the countersunk hole 331 and the through groove 312. When the threaded taper moves relative to the sliding rod 311, the pin 332 slides in the through groove 312, thus preventing the threaded taper 330 from falling off. A compression spring 314 is fitted onto the sliding rod 311, and the pressure of the spring 314 causes the threaded taper 330 to automatically retract and reset after tapping. This design is not only simple and low-cost, but also provides stable operation.

[0036] Before the threaded tap 330 begins tapping, it remains in a retracted state, closest to the horizontal section 310, under the action of the compression spring 314. During tapping, the threaded tap 330 gradually extends relative to the horizontal section 310, resisting the pressure of the compression spring 314. After tapping is complete, the threaded tap 330 completely passes through the nut, the force exerted on the threaded tap 330 by the nut disappears, and the threaded tap 330 retracts under the pressure of the compression spring 314, pushing the nut axially away from the housing 410 and moving to the horizontal section 310.

[0037] After the nut moves from the housing 410 to the horizontal section 310, it pushes multiple nuts on the horizontal section 310 and the curved section 320 to move as a whole. After the nut in the connection area of ​​the horizontal section 310 and the curved section 320 moves to the curved section 320, it moves along the curved section 320 under the action of centrifugal force until it is separated from the main shaft 200.

[0038] A high-reliability fully automatic tapping machine for round nuts generally includes: a motor 210, a first support 110, a first slide rail 120, and a first cylinder 140. The motor 210 is connected to the main spindle 200 and drives the main spindle 200 to rotate the bent-shank tap 300. The first support 110 is mounted on the worktable 100. The first slide rail 120 is mounted on the first support 110, and a first slider 130 is mounted on the first slide rail 120. The first slider 130 is connected to a movable frame 131. The movable frame 131 is fixedly mounted on the main spindle 200. The first cylinder 140 is mounted on the first support 110 and fixedly connected to the first slider 130. It drives the first slider 130 to move the movable frame 131 and the main spindle 200 horizontally, causing the main spindle 200 to move closer to or further away from the clamping mechanism 400.

[0039] like Figure 3 As shown, the output shaft of the motor 210 is fixedly connected to the main shaft 200. When the motor 210 starts, it drives the main shaft 200 to rotate, and the main shaft 200 drives the bent shank tap 300 and the threaded tap 330 to rotate.

[0040] In this embodiment, a first support 110 is provided on the workbench 100, a first slide rail 120 and a matching first slider 130 are provided on the first support 110, and a movable frame 131 connected to the first slider 130 is fixedly sleeved on the spindle 200. When the first cylinder 140 drives the first slider 130 to move along the first slide rail 120, the movable frame 131 drives the spindle 200 to move synchronously in the left and right directions, thereby making the distance of the threaded tap 330 extending into the housing 410 adjustable. On the one hand, it can be adjusted in time after an error occurs in the relative position between the threaded tap 330 and the housing 410 to ensure the tapping effect; on the other hand, it can control the threaded tap 330 to fully extend out of the housing 410, thereby facilitating the cleaning and maintenance of the inside of the housing 410 and the threaded tap 330, and improving maintenance convenience.

[0041] A high-reliability fully automatic tapping machine for round nuts may generally include: a second slide rail 150, a second bracket 170, and a second cylinder 180. The second slide rail 150 is mounted on the worktable 100, and a matching second slider 160 is mounted on the second slide rail 150. The second slider 160 is equipped with a mounting plate 161 and a mounting bracket 162, and a clamping mechanism 400 is mounted on the mounting bracket 162. The second bracket 170 is mounted on the worktable 100. The second cylinder 180 is mounted on the second bracket 170 and fixedly connected to the second slider 160, used to drive the second slider 160 to move along the second slide rail 150, so that the clamping mechanism 400 is opposite or offset from the main shaft 200.

[0042] In this embodiment, a second slide rail 150 and a matching second slider 160 are provided on the workbench 100. A mounting plate 161 and a mounting bracket 162 are provided on the second slider 160. The clamping mechanism 400 is mounted on the mounting bracket 162. When the second cylinder 180 drives the second slider 160 to slide along the second slide rail 150, it drives the mounting plate 161, the mounting bracket 162, and the clamping mechanism 400 to move in the front-back direction. This allows the clamping mechanism 400 to be opposite to or offset from the spindle 200, thereby facilitating the daily cleaning and maintenance of the clamping mechanism 400 and the spindle 200.

[0043] In some embodiments, a first limiting block and a second limiting block may be respectively provided on the first slide rail 120 and the second slide rail 150. When the first slider 130 connected to the main shaft 200 moves to abut against the first limiting block, and the second slider 160 connected to the clamping mechanism 400 moves to abut against the second limiting block, the clamping mechanism 400 is just aligned with the main shaft 200, and the threaded cone 330 just reaches the preset position (i.e., the middle section of the metal spring 420).

[0044] The spindle 200 is fitted with a volute 220, and a discharge port 221 is provided below the volute 220 to discharge the tapped nuts to the bottom of the worktable 100.

[0045] like Figure 1 As shown, the workbench 100 has four downward-facing support legs 190 at its four corners. The discharge port 221 below the volute 220 extends to form a guide channel 222, which passes through the workbench 100 and extends to the bottom of the workbench 100.

[0046] In this embodiment, by installing a volute 220 around the spindle 200 and providing a discharge port 221 below the volute 220, the nut, after being detached from the bent tap 300 under centrifugal force, is guided by the volute 220 and discharged through the discharge port 221 to the bottom of the worktable 100, facilitating the collection and transportation of the nut.

[0047] like Figure 3As shown, the volute 220 is fixed on the worktable 100, and both ends of the spindle 200 extend out of the volute 220. The axial width of the volute 220 is greater than the axial width of the maximum diameter portion of the spindle 200, so as to ensure that the spindle 200 has sufficient movement space within the volute 220 when the first cylinder 140 drives the spindle 200 to move.

[0048] The tightening mechanism 500 generally includes a third cylinder 510 and a telescopic column 520. The third cylinder 510 is connected to the mounting bracket 162 via a stud 511. The telescopic column 520 is connected to the third cylinder 510 and extends into the housing 410 under the drive of the third cylinder 510 to push the nut to be tapped.

[0049] In this embodiment, the third cylinder 510 drives the telescopic column 520 to extend and retract, thereby pushing the nut to be tapped against the threaded tap 330, assisting the threaded tap 330 in completing the tapping. This design is not only simple in structure but also stable in operation.

[0050] In some preferred embodiments, the third cylinder 510 can be configured to periodically drive the telescopic column 520 to extend and retract. The third cylinder 510 extends at first preset intervals, thereby pushing a nut to abut against the threaded taper 330 after the previous nut has disengaged from the housing 410, and retracts after extending for a second preset interval, ensuring that the threaded taper 330 successfully enters the hole of the nut to begin tapping, achieving continuous and uninterrupted automatic tapping and improving tapping efficiency.

[0051] An air hole 411 is provided on the housing 410 in a region away from the threaded tap 330. The gas blown out of the air hole 411 blows the waste generated by tapping out from the end of the housing 410 near the threaded tap 330.

[0052] In this embodiment, by providing an air hole 411 on the housing 410 in a region away from the threaded taper 330, the gas blown out of the air hole 411 flows from left to right in the gap between the housing 410 and the threaded taper 330, carrying the waste material generated in the housing 410 due to tapping, and is blown out from the end of the housing 410 near the threaded taper 330.

[0053] In some embodiments, the threaded taper 330 may be provided with a plurality of unloading grooves 333, which are evenly distributed in the circumferential direction of the threaded taper 330, so that the waste generated by tapping can be discharged in time through the unloading grooves 333, thereby reducing the wear risk of the threaded taper 330 and ensuring the tapping effect.

[0054] A high-reliability fully automatic tapping machine for round nuts may also generally include a feeding bin 600. The feeding bin 600 is vertically arranged above and connected to the housing 410, and is used to store and feed nuts to be tapped to the housing 410. The size of the feeding bin 600 is adapted to the nuts, and the feeding bin 600 has slots 610 on both sides.

[0055] In this embodiment, a feeding bin 600 communicating with the housing 410 is provided above the housing 410. Using gravity, nuts to be tapped are automatically fed into the housing 410 one by one. This design is not only ingenious but also cost-effective. By providing slots 610 on both sides of the feeding bin 600, the storage status of the nuts inside the feeding bin 600 can be observed more directly, facilitating timely replenishment. Furthermore, it facilitates the cleaning and maintenance of the feeding bin 600.

[0056] The specific working process of the high-reliability fully automatic tapping equipment for round nuts provided by the present invention will be described in conjunction with the above embodiments: By controlling the second cylinder 180, the second slider 160 drives the clamping mechanism 400 to move along the second slide rail 150, thereby positioning the clamping mechanism 400 and the main shaft 200 relative to each other. By controlling the first cylinder 140, the first slider 130 drives the main shaft 200 to move along the first slide groove, causing the threaded tap 330 to extend into the housing 410 of the clamping mechanism 400, reaching a preset position (i.e., when the nut is pushed to abut against the threaded tap 330, the nut is just clamped in the middle of the metal spring 420). The motor 210 is started, causing the main shaft 200 and the bent-shank tap 300 to rotate.

[0057] By controlling the third cylinder 510, the telescopic column 520 extends, pushing the nut from the feeding bin 600 into the housing 410, moving it until it abuts against the threaded taper 330. The rotating threaded taper 330 drives the nut to rotate due to friction, increasing the friction between the nut and the metal spring 420 until the nut remains stationary. Subsequently, the threaded taper 330 extends into the hole of the nut to tap. After the threaded taper 330 begins tapping, the telescopic column 520 retracts.

[0058] After the thread tap completes tapping, i.e., after the thread tap has completely passed through the nut, the force applied to the nut by the thread tap disappears, and the nut rotates under the push of the returning metal spring 420. The clamping force of the metal spring 420 on the nut decreases. Then, under the action of the compression spring 314, the thread tap retracts and pushes the nut to slide along the sliding rod 311 to the horizontal section 310. After the nut slides to the horizontal section 310, it pushes multiple nuts located on the horizontal section 310 to move, so that the nut located at the connection between the horizontal section 310 and the curved section 320 enters the curved section 320. Under the action of centrifugal force, the nut that has entered the curved section 320 slides along the curved section 320 and disengages from the main shaft 200, then slides along the volute 220 to the discharge port 221, and finally is discharged below the worktable 100.

[0059] After the threaded taper 330 has fully retracted, the telescopic column 520 pushes the next nut to be tapped into the housing 410. This cycle is repeated.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A highly reliable fully automatic tapping device for round nuts, characterized in that, include: Workbench; A spindle is rotatably mounted on the worktable, and a bent shank tap is disposed inside the spindle; the bent shank tap includes a horizontal section and a curved section connected in sequence, the horizontal section is coaxially disposed with the spindle, and the end of the horizontal section is provided with a retractable threaded tap, and the end of the curved section extends radially along the spindle; The clamping mechanism is cylindrical and horizontally arranged along its axis, used to clamp the nut to be tapped; A clamping mechanism is telescopically disposed at the end of the clamping mechanism away from the threaded cone, for pushing the nut against the threaded cone that extends into the clamping mechanism.

2. The high-reliability fully automatic tapping equipment for round nuts according to claim 1, characterized in that, The clamping mechanism includes a cylindrical housing and a plurality of metal springs evenly distributed circumferentially on the inner wall of the housing. The length direction of the metal springs is parallel to the axis of the housing, and the metal springs are inclined from the outside to the inside along the radial direction of the housing. The inclination direction of the metal springs is opposite to the rotation direction of the threaded cone.

3. The high-reliability fully automatic tapping equipment for round nuts according to claim 2, characterized in that, The width of the metal spring remains constant in the middle, gradually narrowing from the middle edge to both ends.

4. The high-reliability fully automatic tapping equipment for round nuts according to claim 1, characterized in that, The threaded cone has a countersunk hole at one end facing the horizontal section, and a sliding rod extending into the countersunk hole is provided at the other end of the horizontal section facing the threaded cone. A through groove is provided in the middle section of the sliding rod, and a sliding head protruding radially is provided at the end of the sliding rod. A pin is provided on the threaded cone, which passes radially through the countersunk hole and the through groove. A compression spring is sleeved on the sliding rod, with one end of the compression spring abutting against the sliding head and the other end abutting against the pin.

5. The high-reliability fully automatic tapping equipment for round nuts according to claim 1, characterized in that, Also includes: A motor, connected to the main shaft, is used to drive the main shaft to rotate the bent tap; The first support is set on the workbench; A first slide rail is mounted on the first bracket, and a first slider is mounted on the first slide rail. The first slider is connected to a movable frame. The movable frame is fixedly mounted on the main shaft. The first cylinder is mounted on the first bracket and fixedly connected to the first slider. It is used to drive the first slider to move the moving frame and the main shaft in the horizontal direction, so that the main shaft moves closer to or away from the clamping mechanism.

6. The high-reliability fully automatic tapping equipment for round nuts according to claim 2, characterized in that, Also includes: A second slide rail is provided on the worktable. A matching second slider is provided on the second slide rail. A mounting plate and a mounting bracket are provided on the second slider. The clamping mechanism is provided on the mounting bracket. The second support is mounted on the workbench; The second cylinder is mounted on the second bracket and fixedly connected to the second slider. It is used to drive the second slider to move along the second slide rail, so that the clamping mechanism is opposite to or offset from the main shaft.

7. The high-reliability fully automatic tapping equipment for round nuts according to claim 1, characterized in that, The spindle is fitted with a volute, and a discharge port is provided below the volute for discharging the tapped nuts to the bottom of the worktable.

8. The high-reliability fully automatic tapping equipment for round nuts according to claim 6, characterized in that, The clamping mechanism includes: The third cylinder is connected to the mounting bracket via a stud; The telescopic column is connected to the third cylinder and extends into the housing under the drive of the third cylinder to push the nut to be tapped.

9. The high-reliability fully automatic tapping equipment for round nuts according to claim 2, characterized in that, An air blowing hole is provided on the housing in a region away from the threaded taper. The gas blown out of the air blowing hole blows the waste generated by tapping out from the end of the housing near the threaded taper.

10. The high-reliability fully automatic tapping equipment for round nuts according to claim 2, characterized in that, Also includes: A feeding bin, vertically positioned above and connected to the housing, is used to store and feed nuts to be tapped to the housing; The size of the feeding bin is adapted to the nut, and the feeding bin has slots on both sides.

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