A flipping fixture for CNC machining of round-head press-fit screws

Abstract

This utility model discloses a flipping fixture for CNC machining of round-head press-fit screws, including a flipping housing. The upper right side of the flipping housing has a screw discharge groove, and the lower right side of the flipping housing has a screw feed groove. It also includes a flipping mechanism. The flipping mechanism includes a turntable, flipping grooves, a first conveyor belt, and a second conveyor belt. The turntable is rotatably connected to the middle of the left inner wall of the flipping housing via a first rotating shaft. Flipping grooves are respectively provided along the outer edge of the right side of the turntable. The first conveyor belt is disposed inside the screw discharge groove. This utility model, through the synchronous rotation of the turntable and the feeding / discharging components, flips the round-head press-fit screws that sequentially enter the flipping grooves. After being flipped 180 degrees, the round-head press-fit screws automatically leave, achieving automatic continuous flipping of the round-head press-fit screws. This is more suitable for flipping large batches of small workpieces, improving the efficiency of CNC machining of round-head press-fit screws.

Description

Technical Field

[0001] This utility model relates to the field of precision machining technology for hardware parts, specifically a flipping fixture for CNC machining of round-headed rivet screws. Background Technology

[0002] Round head rivet screws are fasteners specifically designed for sheet metal connections. They achieve efficient connections by forming stable external threads on thin plates through pressure. The head is round and formed using a cold heading process, with a toothed embossed structure on the bottom. During the CNC machining process of round head rivet screws, in order to make the machining of round head rivet screws more comprehensive, it is necessary to flip the round head rivet screws during the CNC machining process.

[0003] In the prior art, patent publication number CN 215942172 U proposes a workpiece positioning device for CNC machining that can be flipped. Although it can flip the round head rivet screw, the machining of round head rivet screws is often carried out in large batches, and the clamping and flipping requires a lot of time, which affects the efficiency of CNC machining of round head rivet screws. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a flipping fixture for CNC machining of round head rivet screws, so as to realize the automatic continuous flipping of round head rivet screws, speed up the flipping speed, be more suitable for flipping of small workpieces in large batches, improve the efficiency of CNC machining of round head rivet screws, and effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flipping fixture for CNC machining of round head rivet screws, comprising a flipping housing and a PLC controller, wherein the upper right side surface of the flipping housing is provided with a screw discharge groove, the lower right side surface of the flipping housing is provided with a screw feed groove, and a flipping mechanism is also included. The flipping mechanism includes a turntable, a flipping groove, a first conveyor belt, and a second conveyor belt. The turntable is rotatably connected to the middle of the left inner wall of the flipping housing via a first rotating shaft. A flipping groove is provided on the outer edge of the right side of the turntable. The first conveyor belt is located inside the screw discharge groove, and the second conveyor belt is located inside the screw feed groove. The turntable, the first conveyor belt, and the second conveyor belt rotate synchronously.

[0006] Furthermore, the flipping mechanism also includes a motor and a drive shaft. The motor is installed in the mounting groove on the right side of the flipping housing. The left end of the motor's output shaft is provided with a drive shaft. The left end of the drive shaft is fixedly connected to the middle of the turntable. The input end of the motor is electrically connected to the output end of the PLC controller to provide power for the rotation of the turntable.

[0007] Furthermore, the flipping mechanism also includes partitions, which are respectively disposed on the outer side of one of the conveyor belts. By rotating clockwise with the conveyor belt, the partitions apply a rightward thrust to the round-headed rivet screws, facilitating the round-headed rivet screws to leave the flipping groove.

[0008] Furthermore, the flipping mechanism also includes positioning grooves, which are respectively set on the horizontal surface of the partition. The positioning grooves are all V-shaped grooves, which position the front and rear positions of the round head rivet screws, making the movement of the round head rivet screws more accurate.

[0009] Furthermore, both the front end of the rotating shaft of the conveyor column on the right side of conveyor belt one and the rear end of the rotating shaft of the conveyor column on the right side of conveyor belt two are provided with synchronous pulley one. The front and rear inner walls of the flipping housing are rotatably connected to synchronous pulley two through rotating shaft two. Synchronous pulley two and synchronous pulley one corresponding to the lateral position are connected by a synchronous belt drive. Small bevel gears are provided in the middle of the opposite inner surfaces of the two synchronous pulley two, and large bevel gears are provided on the outer arc surface of the drive shaft. Both small bevel gears are meshed with the large bevel gears, so that conveyor belt one and conveyor belt two rotate synchronously with the turntable.

[0010] Furthermore, the upper end of the inner wall of the flipping housing is provided with a retaining ring, the central axis of the retaining ring is collinear with the central axis of the turntable, the upper end of the retaining ring is provided with a clearance hole for installation with conveyor belt one, and the lower end of the flipping housing is provided with an arc plate, the lower end of the arc plate is provided with a clearance hole for installation with conveyor belt two, which restricts the position of the round head rivet screw during the flipping process and prevents the round head rivet screw from leaving the interior of the flipping groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are: By rotating the turntable synchronously with the feeding and discharging components, the round-headed crimping screws that enter the flipping slot in sequence are flipped. After being flipped 180 degrees, the round-headed crimping screws automatically leave, realizing automatic continuous flipping of the round-headed crimping screws, speeding up the flipping speed, making it more suitable for flipping a large batch of small workpieces, and improving the efficiency of CNC machining of round-headed crimping screws. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a structural schematic diagram of the overall device of this utility model, viewed from the front and in cross-section. Figure 3 This is a side view sectional diagram of the overall device of this utility model; Figure 4 This is a schematic diagram of the flipping mechanism of this utility model.

[0013] In the diagram: 1. Tilting housing, 2. Screw discharge chute, 3. Screw feed chute, 4. Tilting mechanism, 41. Turntable, 42. Tilting chute, 43. Conveyor belt one, 44. Conveyor belt two, 45. Motor, 46. Drive shaft, 47. Positioning groove, 48. Partition plate, 5. Synchronous pulley one, 6. Synchronous pulley two, 7. Synchronous belt, 8. Large bevel gear, 9. Small bevel gear, 10. PLC controller, 11. Retaining ring, 12. Arc plate. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4 This embodiment provides a technical solution: a flipping fixture for CNC machining of round head rivet screws, including a flipping housing 1 and a PLC controller 10, which provides space for the flipping component of the round head rivet screw. The upper right side of the flipping housing 1 is provided with a screw discharge groove 2, which facilitates the flipped round head rivet screw to leave the inside of the flipping housing 1. The lower right side of the flipping housing 1 is provided with a screw feed groove 3, which facilitates the flipping housing 1 to enter the inside of the flipping housing 1.

[0016] The system also includes a tilting mechanism 4. The tilting mechanism 4 includes a turntable 41, a tilting groove 42, a first conveyor belt 43, and a second conveyor belt 44. The turntable 41 is rotatably connected to the middle of the left inner wall of the tilting housing 1 via a first rotating shaft. Tilting grooves 42 are respectively provided along the outer edge of the right side of the turntable 41. The first conveyor belt 43 is located inside the screw discharge groove 2, and the second conveyor belt 44 is located inside the screw feed groove 3. The turntable 41, the first conveyor belt 43, and the second conveyor belt 44 rotate synchronously. The tilting mechanism 4 also includes a motor 45 and a drive shaft 46. The motor 45 is located in the mounting groove on the right side of the tilting housing 1. The left end of the output shaft of the motor 45 is provided with a drive shaft 46, and the left end of the drive shaft 46 is fixedly connected to the middle of the turntable 41. The input end of the motor 45 is electrically connected to the output of the PLC controller 10. The flipping mechanism 4 also includes positioning grooves 47, which are respectively set on the horizontal plate surface of the partition 48. The positioning grooves 47 are all V-shaped grooves. The positioning grooves 47 are used to position the front and rear positions of the round head rivet screws, so that the movement of the round head rivet screws is more accurate. The front end of the conveyor column rotating shaft on the right side of the first conveyor belt 43 and the rear end of the conveyor column rotating shaft on the right side of the second conveyor belt 44 are both provided with synchronous pulleys 5. The front and rear inner walls of the flipping housing 1 are rotatably connected to synchronous pulleys 6 through the rotating shaft 2. The synchronous pulleys 6 and the synchronous pulleys 5 corresponding to the lateral position are connected by a synchronous belt 7. The middle of the opposite inner side of the two synchronous pulleys 6 is provided with small bevel gears 9. The outer arc surface of the drive shaft 46 is provided with large bevel gears 8. The two small bevel gears 9 are meshed with the large bevel gears 8.

[0017] The rotating conveyor belt 44 continuously transports the round-headed rivet screws into the tilting housing 1. Once the screws enter the tilting groove 42, they rotate with the turntable 41, undergoing a 180-degree tilt. The tilted screws align laterally with the conveyor belt 43 and are placed on its surface. As the conveyor belt 43 rotates, the tilted screws are transported to the right. Tensioners are located at the left ends of both the conveyor belt 43 and the conveyor belt 44 to adjust belt tension, ensuring stable operation and power transmission. The motor 45 is started, and its output shaft drives the drive shaft 46 to rotate. The left end of the drive shaft 46 drives the turntable 41 to rotate, providing power for the tilting mechanism 4. The tilting mechanism 4 also includes partitions 48, which are respectively disposed on the outer side of the conveyor belt 43. As the partitions 48 rotate clockwise with the conveyor belt 43, a rightward pushing force is applied to the round-headed rivet screws, making the round-headed rivet screws more accurately disengage from the tilting groove 42. When the drive shaft 46 rotates, it drives the large bevel gear 8 to rotate. Through the meshing connection between the large bevel gear 8 and the small bevel gear 9, the small bevel gear 9 drives the second synchronous pulley 6 to rotate. Utilizing the transmission connection of the synchronous belt 7, the first synchronous pulley 5 drives the right-side conveyor column of the first conveyor belt 43 and the right-side conveyor column of the second conveyor belt 44 to rotate. Due to the symmetrical position of the two small bevel gears 9, the rotation directions of the first conveyor belt 43 and the second conveyor belt 44 are opposite. The upper end of the inner wall of the flipping housing 1 is provided with a retaining ring 11. The central axis of the retaining ring 11 is collinear with the central axis of the turntable 41. The upper end of the retaining ring 11 is provided with a clearance hole for installation with the first conveyor belt 43. The lower end of the flipping housing 1 is provided with an arc plate 12. The lower end of the arc plate 12 is provided with a clearance hole for installation with the second conveyor belt 44. The outer arc diameter of the retaining ring 11 is greater than the distance from the upper surface of the first conveyor belt 43 to the axis of the turntable 41, ensuring that the round-headed rivet screw can be smoothly transferred to the upper surface of the first conveyor belt 43 after it is no longer in contact with the outer arc surface of the retaining ring 11. The inner arc diameter of the arc plate 12 and the inner arc diameter of the flipping housing 1 are both greater than the distance from the upper surface of the second conveyor belt 44 to the axis of the turntable 41, ensuring that the round-headed rivet screw can smoothly contact the inner arc surface of the arc plate 12 and the inner arc surface of the flipping housing 1 after it is no longer in contact with the upper surface of the second conveyor belt 44.

[0018] The working principle of this utility model is as follows: During the CNC machining of the round-head rivet screw, the round-head rivet screw is placed on the upper surface of conveyor belt 44. The motor 45 is started by the PLC controller 10. The output shaft of the motor 45 drives the drive shaft 46 to rotate. The left end of the drive shaft 46 drives the turntable 41 to rotate. At the same time, through the meshing connection of the large bevel gear 8 and the small bevel gear 9, the small bevel gear 9 drives the synchronous pulley 6 to rotate. Through the transmission connection of the synchronous belt 7, the synchronous pulley 5 drives the right side of the conveyor column of conveyor belt 43 and the right side of conveyor belt 44 to rotate. The belt bodies of conveyor belt 43 and conveyor belt 44 rotate. Due to the symmetrical position of the two small bevel gears 9, the belt bodies of conveyor belt 43 and conveyor belt 44 rotate in opposite directions. The counterclockwise rotation of conveyor belt 44 drives the round-headed rivet screw to the left. The conveyor belt 44 applies a leftward thrust to the round-headed rivet screw, causing it to enter the turning groove 42. At this time, the round-headed rivet screw rotates with the turntable 41, turning it over. The round-headed rivet screw, after being turned 180 degrees, corresponds to the lateral position of conveyor belt 43. As conveyor belt 43 drives the partition 48 to rotate clockwise, the partition 48 pushes the round-headed rivet screw out of the turning groove 42, transferring it to the surface of conveyor belt 43. As conveyor belt 43 rotates, the turned round-headed rivet screw is transported to the right, realizing the continuous turning of the round-headed rivet screw. During the flipping process, when the round head rivet screw is fed with its round head facing down, the inner arc surface of the arc plate 12 and the inner arc surface of the flipping housing 1 prevent the round head rivet screw from leaving the flipping groove 42; when the round head rivet screw is fed with its round head facing up, the outer arc surface of the retaining ring 11 prevents the round head rivet screw from leaving the flipping groove 42, ensuring that the round head rivet screw is always inside the flipping groove 42 during the flipping process.

[0019] It is worth noting that the PLC controller 10 disclosed in the above embodiments can be a PIC16F1823-I / P model PLC controller, and the motor 45 can be freely configured according to the actual application scenario. It is recommended to use a 3M57-42A model motor. The PLC controller 10 controls the operation of the motor 45 using methods commonly used in the prior art.

[0020] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A flipping fixture for CNC machining of round-head press-fit screws, comprising a flipping housing (1) and a PLC controller (10), wherein the upper right side of the flipping housing (1) is provided with a screw discharge groove (2) and the lower right side of the flipping housing (1) is provided with a screw feed groove (3), characterized in that: It also includes a flipping mechanism (4); The flipping mechanism (4) includes a turntable (41), a flipping groove (42), a first conveyor belt (43), and a second conveyor belt (44). The turntable (41) is rotatably connected to the middle of the left inner wall of the flipping housing (1) through a first rotating shaft. The outer edge of the right side of the turntable (41) is provided with a flipping groove (42). The first conveyor belt (43) is located inside the screw discharge groove (2), and the second conveyor belt (44) is located inside the screw feed groove (3). The turntable (41), the first conveyor belt (43), and the second conveyor belt (44) rotate synchronously.

2. A flipping fixture for CNC machining of round-head press-fit screws according to claim 1, characterized in that: The flipping mechanism (4) also includes a motor (45) and a drive shaft (46). The motor (45) is installed in the mounting groove on the right side of the flipping housing (1). The left end of the output shaft of the motor (45) is provided with a drive shaft (46). The left end of the drive shaft (46) is fixedly connected to the middle of the turntable (41). The input end of the motor (45) is electrically connected to the output end of the PLC controller (10).

3. A flipping fixture for CNC machining of round-head press-fit screws according to claim 1, characterized in that: The flipping mechanism (4) also includes a partition (48), which is respectively disposed on the outer side of the conveyor belt (43).

4. A flipping fixture for CNC machining of round-head press-fit screws according to claim 3, characterized in that: The flipping mechanism (4) also includes positioning grooves (47), which are respectively set on the horizontal plate surface of the partition (48), and the positioning grooves (47) are all V-shaped grooves.

5. A flipping fixture for CNC machining of round-head press-fit screws according to claim 2, characterized in that: Synchronous pulley 1 (5) is provided at the front end of the rotating shaft of the conveyor column on the right side of conveyor belt 1 (43) and the rear end of the rotating shaft of the conveyor column on the right side of conveyor belt 2 (44). The front and rear inner walls of the flip shell (1) are rotatably connected to synchronous pulley 2 (6) through rotating shaft 2. Synchronous pulley 2 (6) and synchronous pulley 1 (5) corresponding to the lateral position are connected by a synchronous belt (7). Small bevel gear (9) is provided in the middle of the opposite inner side of the two synchronous pulley 2 (6). Large bevel gear (8) is provided on the outer arc surface of the drive shaft (46). The two small bevel gears (9) are meshed with the large bevel gear (8).

6. A flipping fixture for CNC machining of round-head press-fit screws according to claim 1, characterized in that: The upper end of the inner wall of the flipping housing (1) is provided with a retaining ring (11). The central axis of the retaining ring (11) is collinear with the central axis of the turntable (41). The upper end of the retaining ring (11) is provided with a clearance hole that cooperates with the first conveyor belt (43). The lower end of the flipping housing (1) is provided with an arc plate (12). The lower end of the arc plate (12) is provided with a clearance hole that cooperates with the second conveyor belt (44).

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