A nut-making machine with a robotic arm

Abstract

This invention discloses a nut-making machine with a robotic arm, comprising a machine base. The machine base includes a feeding mechanism, a workpiece flipping and delivery mechanism, a pressing mechanism, and a primary rotating shaft for driving the feeding mechanism, the workpiece flipping and delivery mechanism, and the pressing mechanism. This invention uses a primary motor driven by a primary rotating shaft through two reduction gears to drive the feeding mechanism, the workpiece flipping and delivery mechanism, the pressing mechanism, the ejector mechanism, and the cutting assembly. The structure is simplified. The workpiece flipping and delivery mechanism includes two opening and closing grippers and a fixed clamp. This invention uses the grippers to hold and deliver the cut bar stock, making it suitable for larger diameter bars and expanding its applicability. This invention can pre-stress-relieve and clean the raw material bars, ensuring raw material quality and improving product precision and quality.

Description

Technical Field

[0001] This invention relates to the field of cold heading machine technology, and more particularly to a nut-making machine with a robotic arm. Background Technology

[0002] A cold heading machine is a device that utilizes the plastic deformation characteristics of metals to apply axial pressure to metal bars or wires at room temperature, causing the metal blank to undergo local or overall plastic deformation under the constraint of the mold cavity, thereby obtaining parts or semi-finished products with the required shape, size and precision.

[0003] As shown in the workpiece feeding mechanism of a cold heading machine disclosed in application number 202123455858.1, the workpieces in each station of the cold heading machine are currently transferred to the next station by fixed clamps. This workpiece transfer method can only use raw material bars of a specific diameter, which limits the use of the equipment. Therefore, it needs to be improved.

[0004] In addition, current cold heading machines generally do not integrate equipment for pre-treatment of raw material bars. When bars are cold-headed directly without undergoing processes such as dust removal, dust or impurities can easily embed into the nut during the processing, affecting the quality of the nut. Improvements are needed in this regard. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a nut-making machine with a robotic arm to solve the problems mentioned in the background section.

[0006] The present invention provides the following technical solution: a nut-making machine with a robotic arm, comprising a machine base, wherein the machine base is provided with a feeding mechanism, a workpiece flipping and delivery mechanism, a tackling mechanism, and a first rotating shaft for driving the feeding mechanism, the workpiece flipping and delivery mechanism, and the tackling mechanism;

[0007] The workpiece flipping and delivering mechanism includes a fixed base fixed inside the machine base. The fixed base has an installation groove. Fixed shafts arranged at equal distances front and back are fixed in the installation groove. A toothed piece is fixed at the end of the fixed shaft extending to the upper side of the fixed base. A bracket is rotatably connected to the fixed shaft. A vertical shaft is rotatably connected to the portion of the bracket extending to the left side of the fixed base. A semi-toothed ring that meshes with the toothed piece is fixed on the vertical shaft.

[0008] A gripper cylinder is installed at the lower end of the vertical shaft closest to the feeding mechanism. The gripper cylinder contains two movable grippers. The gripper cylinder also contains a control rod that passes through the vertical shaft and is used to control the position of the grippers. It also includes a control component for controlling the up and down position of the control rod.

[0009] The lower end of the vertical shaft without the gripper cylinder is equipped with a flip plate, and the lower end of the flip plate is equipped with a fixed clamp.

[0010] The machine tool is rotatably connected to an output shaft, and a first pulley is mounted at the front end of the output shaft. It also includes a first motor for driving the first pulley to rotate, and the first rotating shaft is connected to the output shaft through a reduction gear set.

[0011] Preferably, the control assembly includes a hinge seat rotatably connected to one of the gear plates, a connecting frame hinged inside the hinge seat, the left end of the connecting frame hinged to the control rod, a drive frame fixed on the fixed seat, a pressure plate hinged inside the drive frame, a top rod pressing against the connecting frame mounted on the left end of the pressure plate, and a No. 1 spring inside the gripper cylinder that tends to tilt the right end of the connecting frame upwards.

[0012] The right side of the pressure plate is bent downward and extended laterally, and is equipped with a roller. A second rotating shaft is also rotatably connected inside the machine. A drive wheel is mounted on the second rotating shaft. The outer curved surface of the drive wheel is integrally formed with a semi-convex ring. The roller is attached to the semi-convex ring or the curved surface of the drive wheel.

[0013] Preferably, the second rotating shaft extends to the front side of the machine base, the front side of the machine base is equipped with a transmission frame, a transmission shaft is rotatably connected inside the transmission frame, a first sprocket is respectively mounted on the transmission shaft and the second rotating shaft, and the first sprockets are connected to each other by a first chain;

[0014] The front end of the first rotating shaft and the transmission shaft are respectively equipped with a second sprocket, and the second sprockets are connected to each other by a second chain.

[0015] Preferably, it further includes a clamping mechanism, which includes inclined arms respectively hinged to the left and right sides of the transmission frame. The end of the inclined arm is equipped with a wheel frame, and a third sprocket is rotatably connected inside the wheel frame. The left and right third sprockets cooperate with the second chain and the first chain respectively. The transmission frame is provided with two first bosses, and the left and right first bosses are respectively connected to the two inclined arms through second springs.

[0016] Preferably, the tamping mechanism includes a slide block that is slidably connected to the machine base, an eccentric wheel is provided outside the first rotating shaft, a drive seat is rotatably connected to the first eccentric wheel, and the drive seat is hinged to the left side of the slide block.

[0017] The machine tool is also equipped with a stamping seat, which has a stamping groove facing the right side punch of the slide block, and the stamping seat is located on the lower side of the fixed seat.

[0018] It also includes a material ejection mechanism that acts within the stamping groove.

[0019] Preferably, the ejector mechanism includes a swing plate hinged to the right side of the machine base, and the swing plate is provided with an ejector rod corresponding to the position of the stamping groove;

[0020] The first rotating shaft extends to the front end of the machine platform and is fixed with a second eccentric wheel. The second eccentric wheel is rotatably connected to a first swing arm, and the right end of the first swing arm is hinged to the swing plate.

[0021] Preferably, the feeding mechanism includes a control box fixed to the right side of the machine base, and control shafts distributed vertically are rotatably connected inside the control box. The control shafts are connected to each other through a transmission gear set. The front end of the control shaft is also equipped with a concave wheel, and the bar stock is clamped between the upper and lower concave wheels.

[0022] A short shaft is rotatably connected to the rear side of the control box, and a rotating sleeve is rotatably connected to the outside of the short shaft. A gear that meshes with the transmission gear set is provided on the short shaft, and a ratchet is installed at the rear end of the short shaft. Two bosses are integrally formed on the upper and lower sides of the rotating sleeve, and a pawl that cooperates with the ratchet is installed on the upper boss.

[0023] The machine tool is hinged to a second swing arm at the rear. The second swing arm and the second boss located on the lower side are connected by a third swing arm. A spring seat is provided at the rear of the machine tool. A third spring is provided between the second swing arm and the spring seat. A third eccentric wheel is provided on the first rotating shaft. One side of the second swing arm presses against the third eccentric wheel.

[0024] Preferably, each bracket is connected to a common guide plate. A scissor box is provided on the rear side of the machine. An S-shaped plate is slidably connected to the scissor box from left to right. A push-pull component is also slidably connected to the scissor box from front to back. The front end of the push-pull component is connected to the guide plate. A spring plate is installed on the part of the push-pull component that extends to the rear side of the scissor box. The spring plate is connected to the rear wall of the scissor box by a spring, so that the push-pull component always abuts against the S-shaped curved surface inside the S-shaped plate.

[0025] The left end of the No. 1 S-shaped plate is equipped with a vertical plate, and the rear end of the No. 1 rotating shaft is eccentrically provided with a protruding post, and the No. 4 swing arm is rotatably connected to the protruding post. The right end of the No. 4 swing arm is hinged to the vertical plate.

[0026] Preferably, it also includes a cutting assembly, which includes a second S-shaped plate that is slidably connected to the scissor box from left to right. The second S-shaped plate is also fixed to the vertical plate. A second push-pull member is also slidably connected to the scissor box from front to back. The portion of the second push-pull member extending to the rear side of the scissor box is equipped with a second spring plate. The second spring plate is connected to the rear wall of the scissor box by a fifth spring, so that the second push-pull member always abuts against the S-shaped curved surface inside the second S-shaped plate.

[0027] The second push-pull component is equipped with a circular cutter at one end extending into the machine base, and the circular cutter has a cutting hole through which the bar stock passes.

[0028] Preferably, the control box is further provided with a pretreatment box, the pretreatment box is provided with a cleaning chamber, the bottom surface of the cleaning chamber is provided with a liquid storage tank, and the top surface of the cleaning chamber is provided with a spray pipe;

[0029] A water-squeezing column is mounted on the side of the cleaning chamber via a mounting bracket. A rotating ring is fitted on the outer curved surface of the water-squeezing column, and a chip removal plate is provided on the rotating ring and attached to the right side of the water-squeezing column.

[0030] A second motor is also provided on the side of the cleaning chamber. A friction wheel is provided on the drive shaft of the second motor and attached to the rotating ring. A water pump driven by the drive shaft is also provided on the side of the spray pipe. The outlet of the water pump is connected to the flow channel in the spray pipe, and the inlet of the water pump is connected to the storage tank through a hose.

[0031] The right side of the pretreatment box is integrally formed with an elongated plate, and a heat insulation cavity is provided inside the elongated plate. A heating coil that is penetrated by the bar material is provided inside the heat insulation cavity.

[0032] This invention provides a nut-making machine with a robotic arm, which has the following advantages:

[0033] This invention utilizes a primary motor driven by a primary shaft through two reduction gears to drive the feeding mechanism, workpiece flipping and delivery mechanism, tamping mechanism, ejecting mechanism, and cutting assembly. This enables the overall drive of a nut-making machine with a robotic arm, unlike traditional cold heading machines which use multiple primary motors to achieve various functions. The driving method of this invention allows most of the debugging work of a nut-making machine with a robotic arm to be completed before leaving the factory, greatly reducing the skill requirements and debugging time for after-sales personnel. Furthermore, the purely mechanical transmission scheme has high stability and high reliability, improving the product's service life.

[0034] The workpiece flipping and delivery mechanism includes two jaws that can open and close, and a clamp that is fixedly installed. The present invention uses the jaws to hold and deliver the cut bar stock, making it applicable to bar stock with larger diameters and increasing its applicability. Furthermore, the present invention uses the clamp to deliver the rough blank that has been hammered once or several times, reducing the number of equipment parts and manufacturing costs while ensuring reliability.

[0035] This invention enables stress relief and cleaning of raw material bars in advance, ensuring the quality of raw materials and improving product precision and quality. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the appearance of the present invention;

[0037] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0038] Figure 3 yes Figure 1 Enlarged view of point B in the middle;

[0039] Figure 4 yes Figure 1 External view of the central fixing seat;

[0040] Figure 5 yes Figure 1 Schematic diagram of the structure inside the pretreatment box;

[0041] Figure 6 This is a schematic diagram of the appearance of the present invention from another perspective;

[0042] Figure 7 This is a schematic diagram of the external appearance of each component inside the scissor box in this invention.

[0043] In the picture:

[0044] 11. Machine base; 12. Output shaft; 13. Pulley; 14. Reduction gear set; 21. Fixed base; 22. Mounting slot; 23. Fixed shaft; 24. Gear plate; 25. Bracket; 26. Vertical shaft; 27. Gear ring; 28. Grip cylinder; 29. ​​Grip; 30. Control lever; 31. Tilting plate; 32. Clamp; 33. Hinge seat; 34. Connecting frame; 35. Drive frame; 36. Pressure plate; 37. Roller; 38. Second rotating shaft; 39. Drive wheel; 40. Semi-convex ring; 41. Transmission frame; 42. Transmission shaft; 43. First chain; 44. Second chain; 45. Wheel frame; 46. Slide; 47. Drive base; 48. Swing plate; 49. Top rod; 50. First swing arm; 51. Control box 52. Control shaft; 53. Transmission gear set; 54. Concave wheel; 55. Rotating sleeve; 56. Short shaft; 57. Ratchet; 58. Boss; 59. No. 2 swing arm; 60. No. 3 swing arm; 61. Guide plate; 62. Scissor box; 63. No. 1 S-shaped plate; 64. No. 1 push-pull component; 65. No. 1 spring plate; 66. Vertical plate; 67. No. 4 swing arm; 68. No. 2 S-shaped plate; 69. No. 2 push-pull component; 70. No. 2 spring plate; 71. Pretreatment box; 72. Cleaning chamber; 73. Liquid storage tank; 74. Spray pipe; 76. Water squeezing column; 77. Rotary ring; 78. Chip removal plate; 79. No. 2 motor; 80. Drive shaft; 81. Extension plate; 82. Heating coil; 91. No. 1 rotating shaft; 92. Water pump. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] Furthermore, the terms "first" and "second" are used 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. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly 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, an electrical connection, or a connection that allows communication between them; 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 explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Reference Figures 1-7 According to an embodiment of a nut-making machine with a robotic arm according to the present invention, a machine base 11 is provided, wherein a feeding mechanism 101, a workpiece flipping and delivery mechanism 102, a tamping mechanism 103, and a first rotating shaft 91 for driving the feeding mechanism 101, the workpiece flipping and delivery mechanism 102, and the tamping mechanism 103 are provided in the machine base 11.

[0050] The feeding mechanism 101 is used to feed the bar stock into the machine base 11 through the material hole and cut it by the cutting assembly. The workpiece flipping and delivery mechanism 102 is used to cooperate with the tamping mechanism 103 so that the cut bar stock is tamped and shaped at each station to finally form a nut.

[0051] In this embodiment, the first rotating shaft 91 is controlled as follows: an output shaft 12 is rotatably connected inside the machine base 11; a first pulley 13 is mounted at the front end of the output shaft 12; a first motor (not shown in the figure) is also included; a second pulley is mounted on the output shaft inside the first motor; the first pulley 13 and the second pulley are driven by a belt (not shown in the figure); the diameter of the first pulley 13 is larger than the diameter of the second pulley to form a first-stage reduction; the first rotating shaft 91 and the output shaft 12 are connected by a reduction gear set 14 to form a second-stage reduction for the first rotating shaft 91. Through the two-stage reduction, the rotational torque, rotational accuracy, and transmission reliability of the first rotating shaft 91 are improved, thereby achieving stability of the output of the feeding mechanism 101, the workpiece flipping and delivering mechanism 102, and the tamping mechanism 103. Furthermore, the first motor drives the operation of each mechanism, improving the simplification of the equipment and reducing the maintenance frequency.

[0052] The workpiece flipping and delivery mechanism 102 is used to transfer cut bar stock or rough billets that have been pounded several times. The workpiece flipping and delivery mechanism 102 includes a fixed base 21 fixed in the machine base 11. The fixed base 21 has an installation groove 22. Fixed shafts 23 arranged at equal distances front and back are fixed in the installation groove 22. A toothed piece 24 is fixed at the end of the fixed shaft 23 extending to the upper side of the fixed base 21. A bracket 25 is also rotatably connected to the fixed shaft 23. A vertical shaft 26 is rotatably connected to the part of the bracket 25 extending to the left side of the fixed base 21. A semi-toothed ring 27 that meshes with the toothed piece 24 is fixed on the vertical shaft 26.

[0053] A robotic arm is mounted at the lower end of the vertical shaft 26 closest to the feeding mechanism 101 (i.e., the last vertical shaft 26). The robotic arm includes a gripper cylinder 28, which contains two movable grippers 29. The gripper cylinder 28 also contains a control rod 30 that passes through the vertical shaft 26 and is used to control the position of the grippers 29. It also includes a control component for controlling the up and down position of the control rod 30. It should be noted that the specific structure of controlling the opening or closing of the grippers 29 by the up and down position of the control rod 30 is existing technology and will not be described in detail here.

[0054] The lower end of the vertical shaft 26, which is not equipped with the gripper cylinder 28, is equipped with a flip plate 31, and the lower end of the flip plate 31 is equipped with a fixed clamp 32 (the clamp 32 is capable of elastic deformation).

[0055] The difference between the gripper 29 and the clamp 32 is that the gripper 29 can be opened or closed in a controlled manner to clamp and transfer the large-diameter bar stock cut by the cutting assembly. The clamp 32 is used to transfer the bar stock or billet that has been pounded once or several times. By setting the gripper cylinder 28, the nut machine with a robotic arm can have a wider range of applications.

[0056] To achieve automated mechanical control of the gripper 29, the control assembly includes a hinged seat 33 rotatably connected to one of the toothed plates 24. A connecting frame 34 is hinged within the hinged seat 33, and the left end of the connecting frame 34 is hinged to the control rod 30. A drive frame 35 is also fixed to the fixed base 21, and a pressure plate 36 is hinged within the drive frame 35. A push rod is mounted on the left end of the pressure plate 36, pressing against the right edge of the upper side of the connecting frame 34. The axis of the push rod is parallel to the hinged... The rotation axes of the seat 33 and the connecting frame 34 are collinear. The gripper cylinder 28 is also provided with a first spring that makes the right end of the connecting frame 34 tend to be raised. The right side of the pressure plate 36 is bent downward and extended laterally and is equipped with a roller 37. The machine base 11 is also rotatably connected to a second rotating shaft 38. A drive wheel 39 is mounted on the second rotating shaft 38. The outer curved surface of the drive wheel 39 is integrally formed with a semi-convex ring 40. The roller 37 is attached to the semi-convex ring 40 or the curved surface of the drive wheel 39.

[0057] When the second rotating shaft 38 rotates, it drives the drive wheel 39 to rotate. In conjunction with the first spring, the left end of the pressure plate 36 periodically rises or falls, thereby controlling the up and down position of the control rod 30 and causing the gripper 29 to open or close. When the vertical shaft 26 rotates and moves back and forth, causing the gripper cylinder 28 to flip, the hinge seat 33 also rotates around the axis of the fixed shaft 23 to maintain the engagement.

[0058] In order for the first rotating shaft 91 to drive the second rotating shaft 38 to rotate, the second rotating shaft 38 extends to the front side of the machine base 11. The front side of the machine base 11 is equipped with a transmission frame 41, and a transmission shaft 42 is rotatably connected inside the transmission frame 41. The transmission shaft 42 and the second rotating shaft 38 are respectively equipped with a first sprocket, and the first sprockets are connected to each other by a first chain 43.

[0059] The front end of the first rotating shaft 91 and the transmission shaft 42 are respectively equipped with a second sprocket, and the second sprockets are connected to each other by a second chain 44.

[0060] In order to keep the second chain 44 under tension and reduce the difficulty of adjustment, a clamping mechanism is also included. The clamping mechanism includes inclined arms that are respectively hinged to the left and right sides of the transmission frame 41. The end of the inclined arm is equipped with a wheel frame 45, and a third sprocket is rotatably connected inside the wheel frame 45. The left and right third sprockets cooperate with the second chain 44 and the first chain 43, respectively. The transmission frame 41 is provided with two first bosses, and the left and right first bosses are respectively connected to the two inclined arms through second springs.

[0061] In order to enable the gripper cylinder 28 and each of the flipping plates 31 to move back and forth synchronously and flip for feeding, a guide plate 61 is connected to the outside of each bracket 25. A scissor box 62 is provided on the rear side of the machine base 11. An S-shaped plate 63 is slidably connected to the scissor box 62 from left to right. A push-pull member 64 is also slidably connected to the scissor box 62 from front to back. The front end of the push-pull member 64 is connected to the guide plate 61. A spring plate 65 is installed on the part of the push-pull member 64 that extends to the rear side of the scissor box 62. The spring plate 65 is connected to the rear wall of the scissor box 62 by a fourth spring, so that the push-pull member 64 always abuts against the S-shaped curved surface inside the S-shaped plate 63.

[0062] The left end of the first S-shaped plate 63 is equipped with a vertical plate 66, and the rear end of the first rotating shaft 91 is eccentrically provided with a protruding post, and the fourth swing arm 67 is rotatably connected to the protruding post. The right end of the fourth swing arm 67 is hinged to the vertical plate 66.

[0063] The specific transmission method is as follows: when the first rotating shaft 91 rotates, it drives the vertical plate 66 to reciprocate left and right through the convex post and the fourth swing arm 67. Through the fourth spring and the first S-shaped plate 63, the first push-pull member 64 and the guide plate 61 move back and forth periodically. When the guide plate 61 moves back and forth, the toothed ring 27 will remain engaged with the toothed plate 24, and the flipping plate 31 and the gripper cylinder 28 will flip to facilitate the transfer of materials.

[0064] The piercing mechanism 103 includes a slide block 46 that is slidably connected to the machine base 11. An eccentric wheel is provided outside the first rotating shaft 91. A drive seat 47 is rotatably connected to the first eccentric wheel, and the drive seat 47 is hinged to the left side of the slide block 46.

[0065] The machine base 11 is also equipped with a stamping seat, which has a stamping groove facing the right side punch (not shown in the figure) of the slide 46, and the stamping seat is located on the lower side of the fixed base 21.

[0066] When the first rotating shaft 91 rotates, the first eccentric wheel and the drive seat 47 cause the slide 46 and the punch on it to reciprocate left and right, and the nut is formed through the stamping groove. During the gap when the punch moves to the left, the ejector mechanism in the machine 11 can eject the blank in the stamping groove, so that the flipping plate 31 and the clamp 32 on it can transfer the blank to the next station for further cold heading.

[0067] In this embodiment, the ejector mechanism includes a swing plate 48 hinged to the right side of the machine base 11. The swing plate 48 is provided with an ejector rod 49 corresponding to the position of the stamping groove. That is, when the swing plate 48 swings to the left, the ejector rod 49 can be used to eject the blank located in the stamping groove.

[0068] In order for the first rotating shaft 91 to drive the swing plate 48 to swing back and forth, a second eccentric wheel is fixedly provided at the front end of the first rotating shaft 91 extending to the front side of the machine base 11. The second eccentric wheel is externally connected to a first swing arm 50. The right end of the first swing arm 50 is hinged to the swing plate 48. That is, when the first rotating shaft 91 rotates, it will cause the swing plate 48 to swing left and right periodically through the first swing arm 50 to perform timed material feeding.

[0069] The feeding mechanism 101 includes a control box 51 fixed to the right side of the machine base 11. Control shafts 52 distributed vertically are rotatably connected inside the control box 51. The control shafts 52 are connected to each other through a transmission gear set 53. The front end of the control shaft 52 is also equipped with a concave wheel 54, and the bar stock is clamped between the upper and lower concave wheels 54.

[0070] The method for driving the transmission gear set 53 to rotate is as follows: a short shaft 56 is rotatably connected to the inner rear side of the control box 51, and a rotating sleeve 55 is rotatably connected to the outer side of the short shaft 56. A gear meshing with the transmission gear set 53 is provided on the short shaft 56. A ratchet 57 is fixed on the short shaft 56. The upper and lower sides of the rotating sleeve 55 are integrally formed with second bosses 58. The second boss 58 on the upper side is equipped with a pawl (not shown in the figure) that cooperates with the ratchet 57. A second swing arm 59 is hinged to the rear side of the machine base 11. The second swing arm 59 and the second boss 58 on the lower side are connected by a third swing arm 60. A spring seat is provided on the rear side of the machine base 11. A third spring is provided between the second swing arm 59 and the spring seat. A third eccentric wheel is provided on the first rotating shaft 91. One side of the second swing arm 59 presses against the third eccentric wheel.

[0071] When the first rotating shaft 91 rotates, it causes the lower edge of the second swing arm 59 to swing periodically left and right through the third eccentric wheel and the third spring, thereby driving the third swing arm 60 to move periodically left and right. During this process, the boss 58 drives the rotating sleeve 55 to rotate periodically in both directions. With the cooperation of the pawl and the ratchet 57, for each cycle of rotation of the rotating sleeve 55, the ratchet 57, the short shaft 56 and the gear will only rotate in one direction by a certain angle. The unidirectional rotation of the gear will drive the transmission gear set 53, the control shaft 52 and the concave wheel 54 to rotate by a certain angle, and periodically feed the bar stock into the machine base 11 through the material hole at equal lengths.

[0072] In order to adjust the swing amplitude of the rotating sleeve 55, the connection method between the second swing arm 59 and the third swing arm 60 is as follows: the second swing arm 59 is provided with a sliding groove, and a slider is slidably connected in the sliding groove; the right end of the third swing arm 60 is hinged in the slider; and the second swing arm 59 is provided with a locking member for locking the angle of the slider. The operator can adjust the position of the slider, thereby controlling the movement amplitude of the third swing arm 60.

[0073] After the bar stock is fed into the machine 11, it needs to be cut so that it can be clamped by the gripper 29 and sent to the first pressing station. The cutting assembly includes a second S-shaped plate 68 that is slidably connected to the shear box 62 from left to right. The second S-shaped plate 68 is also fixed to the vertical plate 66. A second push-pull member 69 is also slidably connected to the shear box 62 from front to back. The part of the second push-pull member 69 that extends to the rear side of the shear box 62 is equipped with a second spring plate 70. The second spring plate 70 is connected to the rear wall of the shear box 62 by a fifth spring so that the second push-pull member 69 always abuts against the S-shaped curved surface inside the second S-shaped plate 68. A circular blade is installed at one end of the second push-pull member 69 that extends into the machine 11. The circular blade has a cutting hole through which the bar stock passes.

[0074] When the vertical plate 66 moves left and right, it will also drive the second S-shaped plate 68 to move left and right. At this time, the second push-pull member 69 will also move back and forth periodically. When the second push-pull member 69 moves away from the machine table 11, the bar stock will be cut by the circular knife. At this time, the gripper 29 can clamp the cut bar stock. Afterwards, the gripper cylinder 28 can flip and move forward so that the clamped bar stock is facing the first stamping groove in the stamping seat.

[0075] In a second embodiment of the nut-making machine with a robotic arm, the control box 51 is further provided with a pretreatment box 71, the pretreatment box 71 is provided with a cleaning chamber 72, the bottom surface of the cleaning chamber 72 is provided with a liquid storage tank 73, and the top surface of the cleaning chamber 72 is provided with a spray pipe 74. The cleaning liquid sprayed from the spray pipe 74 will be sprayed onto the bar stock to wash away the dust and impurities on it, and the liquid storage tank 73 is used to recover the remaining cleaning liquid.

[0076] In addition, in order to squeeze the cleaned bar stock dry, a water-squeezing column 76 is installed on the side of the cleaning chamber 72 by a mounting bracket. The water-squeezing column 76 includes a plastic outer shell and a rubber inner layer. When the bar stock passes through the rubber inner layer, it will be squeezed dry and surface impurities will be removed. A rotating ring 77 is fitted on the outer curved surface of the water-squeezing column 76. A chip removal plate 78 is provided on the rotating ring 77 and attached to the right side of the water-squeezing column 76.

[0077] A second motor 79 is also provided on the side of the cleaning chamber 72. A friction wheel that contacts the rotating ring 77 is provided on the drive shaft 80 inside the second motor 79. A water pump 92 driven by the drive shaft 80 is also provided on the side of the spray pipe 74. The outlet of the water pump 92 is connected to the flow channel in the spray pipe 74, and the inlet of the water pump 92 is connected to the storage tank 73 through a hose.

[0078] When the second motor 79 is powered on, the water pump 92 pumps water and sprays the cleaning liquid onto the bar stock through the spray pipe 74. Then, when the bar stock is pulled to the left by the feeding mechanism 101, the bar stock will pass through the squeezing column 76 to remove chips and dust. At the same time, the rotating ring 77 and the chip removal plate 78 driven by the friction wheel will scrape and clean the right side of the squeezing column 76 where dust and debris have accumulated.

[0079] In addition, in order to achieve stress relief of the bar stock and avoid the problem of workpiece cracking caused by the superposition of residual stress of the bar stock and stress generated by cold heading, an elongation plate 81 is integrally formed on the right side of the pretreatment box 71. An insulation cavity is provided inside the elongation plate 81, and a heating coil 82 through which the bar stock passes is provided inside the insulation cavity. When the bar stock is dragged to the left by the feeding mechanism 101, it will first pass through the heating coil 82 for heating and perform stress relief work in the insulation cavity. Afterwards, the workpiece will be sprayed with cleaning liquid to remove dust attracted by static electricity during the heating process, ensuring the quality of raw materials.

[0080] Specific processing flow:

[0081] The first motor will remain energized, causing the first rotating shaft 91 to rotate. While the first rotating shaft 91 is rotating, simultaneously:

[0082] 1. The transmission gear set 53 is driven to rotate intermittently so that the bar material processed by the pretreatment box 71 is intermittently driven by the concave wheel 54 for feeding.

[0083] 2. Drive the second push-pull component 69 and the circular knife to move back and forth periodically to cut the bar stock.

[0084] 3. Drive the guide plate 61 to move back and forth periodically (the guide plate 61 will also move slightly left and right so that the toothed ring 27 and the toothed plate 24 remain engaged in any position), so that the gripper cylinder 28 and the flipping plate 31 move back and forth and flip over.

[0085] The first rotating shaft 91 drives the second rotating shaft 38 to rotate, thereby causing the control rod 30 to move up and down periodically, so as to realize the clamping and releasing function of the gripper 29, so that the gripper 29 can clamp and transfer bar stock with a larger diameter.

[0086] The various clamps 32, which are flipped and moving back and forth, transfer the blanks in different processes so that they can enter the next pressing process.

[0087] 4. Drive the slide block 46 to move left and right periodically to perform a pressing operation on the bar stock or billet transferred by the clamp 32 or the jaw 29.

[0088] 5. The swing plate 48 is driven to swing periodically left and right to push out the rough billet being hammered, so that the rough billet can be transferred by the clamp 32.

[0089] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A nut-making machine with a robotic arm, comprising a machine base (11), characterized in that: The machine base (11) is equipped with a feeding mechanism (101), a workpiece flipping and delivery mechanism (102), a tumbling mechanism (103), and a first rotating shaft (91) for driving the feeding mechanism (101), the workpiece flipping and delivery mechanism (102), and the tumbling mechanism (103). The workpiece flipping and delivery mechanism (102) includes a fixed seat (21) fixed in the machine base (11), a mounting groove (22) is provided in the fixed seat (21), a fixed shaft (23) arranged at equal distances in the mounting groove (22) is fixed in the mounting groove (22), a toothed piece (24) is fixed at the end of the fixed shaft (23) extending to the upper side of the fixed seat (21), a bracket (25) is rotatably connected to the fixed shaft (23), a vertical shaft (26) is rotatably connected to the part of the bracket (25) extending to the left side of the fixed seat (21), and a semi-toothed ring (27) that meshes with the toothed piece (24) is fixed on the vertical shaft (26). A gripper cylinder (28) is installed at the lower end of the vertical shaft (26) closest to the feeding mechanism (101). The gripper cylinder (28) contains two movable grippers (29). The gripper cylinder (28) also contains a control rod (30) that passes through the vertical shaft (26) and is used to control the position of the grippers (29). It also includes a control component for controlling the up and down position of the control rod (30). The lower end of the vertical shaft (26) without the gripper cylinder (28) is equipped with a flip plate (31), and the lower end of the flip plate (31) is equipped with a fixed clamp (32). The machine base (11) is rotatably connected to an output shaft (12), and a first pulley (13) is mounted at the front end of the output shaft (12). It also includes a first motor for driving the first pulley (13) to rotate. The first rotating shaft (91) and the output shaft (12) are connected by a reduction gear set (14). The piercing mechanism (103) includes a slide (46) that is slidably connected to the machine base (11) on the left and right. An eccentric wheel is provided outside the first rotating shaft (91). A drive seat (47) is rotatably connected to the outside of the first eccentric wheel, and the drive seat (47) is hinged to the left side of the slide (46). The machine base (11) is also equipped with a stamping seat, which has a stamping groove facing the right side punch of the slide (46) and is located on the lower side of the fixed seat (21). It also includes a material ejection mechanism that acts within the stamping groove.

2. The nut-making machine with a robotic arm according to claim 1, characterized in that: The control assembly includes a hinge seat (33) rotatably connected to one of the toothed plates (24), a connecting frame (34) hinged in the hinge seat (33), the left end of the connecting frame (34) hinged to the control rod (30), a drive frame (35) fixed on the fixed seat (21), a pressure plate (36) hinged in the drive frame (35), a top rod pressing against the connecting frame (34) is installed on the left end of the pressure plate (36), and a No. 1 spring is provided in the gripper cylinder (28) to make the right end of the connecting frame (34) tend to tilt upwards; The right side of the pressure plate (36) is bent downward and extended laterally and is equipped with a roller (37). A second rotating shaft (38) is also rotatably connected inside the machine base (11). A drive wheel (39) is mounted on the second rotating shaft (38). A semi-convex ring (40) is integrally formed on the outer curved surface of the drive wheel (39). The roller (37) is attached to the semi-convex ring (40) or the curved surface of the drive wheel (39).

3. A nut-making machine with a robotic arm according to claim 2, characterized in that: The second rotating shaft (38) extends to the front side of the machine base (11). A transmission frame (41) is installed on the front side of the machine base (11). A transmission shaft (42) is rotatably connected inside the transmission frame (41). A first sprocket is installed on the transmission shaft (42) and the second rotating shaft (38), and the first sprockets are connected to each other by a first chain (43). The front end of the first rotating shaft (91) and the transmission shaft (42) are respectively equipped with second sprockets, and the second sprockets are connected to each other by a second chain (44).

4. A nut-making machine with a robotic arm according to claim 3, characterized in that: It also includes a clamping mechanism, which includes inclined arms that are respectively hinged to the left and right sides of the transmission frame (41). The end of the inclined arm is equipped with a wheel frame (45), and a third sprocket is rotatably connected inside the wheel frame (45). The left and right third sprockets cooperate with the second chain (44) and the first chain (43) respectively. Two first bosses are provided on the transmission frame (41), and the left and right first bosses are respectively connected to the two inclined arms through second springs.

5. A nut-making machine with a robotic arm according to claim 1, characterized in that: The top material mechanism includes a swing plate (48) hinged to the right side of the machine base (11), and the swing plate (48) is provided with a top material rod (49) corresponding to the position of the stamping groove. The first rotating shaft (91) extends to the front end of the machine platform (11) and is fixed with a second eccentric wheel. The second eccentric wheel is externally rotatably connected to a first swing arm (50). The right end of the first swing arm (50) is hinged to the swing plate (48).

6. A nut-making machine with a robotic arm according to claim 1, characterized in that: The feeding mechanism (101) includes a control box (51) fixed to the right side of the machine base (11). The control box (51) is rotatably connected with control shafts (52) distributed vertically. The control shafts (52) are connected to each other through a transmission gear set (53). The front end of the control shaft (52) is also equipped with a concave wheel (54). The bar stock is clamped between the upper and lower concave wheels (54). A short shaft (56) is rotatably connected to the rear side of the control box (51). A rotating sleeve (55) is rotatably connected to the short shaft (56). A gear that meshes with the transmission gear set (53) is provided on the short shaft (56). A ratchet (57) is installed at the rear end of the short shaft (56). Two bosses (58) are integrally formed on the upper and lower sides of the rotating sleeve (55). A pawl that cooperates with the ratchet (57) is installed on the upper boss (58). The machine base (11) is hinged to a second swing arm (59) at the rear. The second swing arm (59) and the second boss (58) located on the lower side are connected by a third swing arm (60). A spring seat is provided at the rear of the machine base (11). A third spring is provided between the second swing arm (59) and the spring seat. A third eccentric wheel is provided on the first rotating shaft (91). One side of the second swing arm (59) is pressed against the third eccentric wheel.

7. A nut-making machine with a robotic arm according to claim 1, characterized in that: Each bracket (25) is connected to a guide plate (61). A scissor box (62) is provided on the rear side of the machine base (11). An S-shaped plate (63) is slidably connected to the scissor box (62) from left to right. A push-pull component (64) is slidably connected to the scissor box (62) from front to back. The front end of the push-pull component (64) is connected to the guide plate (61). A spring plate (65) is installed on the part of the push-pull component (64) extending to the rear side of the scissor box (62). The spring plate (65) is connected to the rear wall of the scissor box (62) by a fourth spring, so that the push-pull component (64) always abuts against the S-shaped curved surface inside the S-shaped plate (63). The left end of the first S-shaped plate (63) is equipped with a vertical plate (66), and the rear end of the first rotating shaft (91) is eccentrically provided with a protruding post, and the protruding post is rotatably connected to the fourth swing arm (67), and the right end of the fourth swing arm (67) is hinged to the vertical plate (66).

8. A nut-making machine with a robotic arm according to claim 7, characterized in that: It also includes a cutting assembly, which includes a second S-shaped plate (68) that is slidably connected to the scissor box (62) from left to right. The second S-shaped plate (68) is also fixed to the vertical plate (66). The scissor box (62) is also slidably connected to a second push-pull member (69) from front to back. The second push-pull member (69) is equipped with a second spring plate (70) on the part extending to the rear side of the scissor box (62). The second spring plate (70) is connected to the rear wall of the scissor box (62) by a fifth spring, so that the second push-pull member (69) always abuts against the S-shaped curved surface inside the second S-shaped plate (68). The second push-pull member (69) is equipped with a circular cutter at one end extending into the machine base (11), and the circular cutter has a cutting hole through which the bar stock is penetrated.

9. A nut-making machine with a robotic arm according to claim 6, characterized in that: The control box (51) is also provided with a pretreatment box (71), the pretreatment box (71) is provided with a cleaning chamber (72), the bottom surface of the cleaning chamber (72) is provided with a liquid storage tank (73), and the top surface of the cleaning chamber (72) is provided with a spray pipe (74). A water-squeezing column (76) is mounted on the side of the cleaning chamber (72) via a mounting bracket. A rotating ring (77) is fitted on the outer curved surface of the water-squeezing column (76). A chip removal plate (78) is provided on the rotating ring (77) and attached to the right side of the water-squeezing column (76). A second motor (79) is also provided on the side of the cleaning chamber (72). A friction wheel attached to the rotating ring (77) is provided on the drive shaft (80) inside the second motor (79). A water pump (92) driven by the drive shaft (80) is also provided on the side of the spray pipe (74). The outlet of the water pump (92) is connected to the flow channel in the spray pipe (74), and the inlet of the water pump (92) is connected to the storage tank (73) through a hose. The right side of the pretreatment box (71) is integrally formed with an elongated plate (81), and an insulation cavity is provided inside the elongated plate (81), and a heating coil (82) pierced by the bar material is provided inside the insulation cavity.

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