Automatic screw machine

Abstract

The utility model belongs to the field of machining, and particularly relates to an automatic screw machine which comprises a feeding assembly, a die assembly assembly, a fastening assembly and a screw feeder. The feeding assembly comprises an operation table and a cover plate table, and the operation table and the cover plate table can move along the Y axis. The die assembling assembly comprises an air cylinder and a suction nozzle communicated with the air cylinder, and the suction nozzle can move in the X-axis direction and the Z-axis direction; the fastening assembly comprises a tool bit and a motor in transmission with the tool bit, the tool bit can move in the X-axis direction and the Z-axis direction, and the motor provides torque around the Z axis. The screw feeder is arranged in a projection area of the tool bit in the XY plane, the movement range of the tool bit coincides with the movement range of the operation table in the projection area of the XY plane, the movement range of the suction nozzle coincides with the movement range of the operation table and the movement range of the cover plate table in the projection area of the XY plane, and the movement range of the suction nozzle and the tool bit in the Z direction comprises the height of the screw feeder and the height of the feeding assembly. The automatic mold closing device has the effects of automatically closing the mold and tightening the screw.

Description

Technical Field

[0001] This application relates to the field of machining, and particularly to an automatic screw machine. Background Art

[0002] In modern machining processes, threaded connections are a widely used fastening method. Compared with other connection methods such as snap connections, threaded connections have higher stability and reliability. Threaded connections are achieved through the thread engagement between screws and screw sleeves. This connection method can not only withstand large axial and radial forces, but also prevent vibration and loosening, ensuring the long-term stable operation of equipment. In addition, threaded connections have the advantage of being convenient for disassembly and maintenance. Users can disassemble screws with simple tools to perform equipment inspection, maintenance, and component replacement. Threaded connections are widely used in various mechanical equipment.

[0003] Currently, in many production and assembly processes, manually screwing screws is still a common operation method. Operators use manual tools such as screwdrivers or electric screwdrivers to fasten screws to the specified positions. This method, due to its simplicity, feasibility, and low cost, still has certain application value especially in small-batch and diversified production environments. The flexibility of manually screwing screws allows operators to make adjustments according to specific requirements, making it suitable for various complex and special assembly tasks. However, with the increase in production scale and complexity, the disadvantages of manually screwing screws are gradually emerging.

[0004] In practical applications, there are problems of low efficiency and uneven force when manually screwing screws. First of all, the speed of manual operation is limited. Especially on assembly lines that require a large number of screws to be fastened, operators are prone to fatigue, resulting in reduced work efficiency. Secondly, due to the different hand strengths and operating habits of each operator, it is difficult to maintain consistent fastening force for the screws. This not only affects the assembly quality of the product, but may also cause problems such as screw loosening or over-tightening, further affecting the service life and performance of the product. More importantly, the repetitive labor intensity of manually screwing screws is high, and long-term operation is likely to cause occupational diseases for operators, such as carpal tunnel syndrome, etc. Therefore, there is an urgent need for an automated screw fastening device to improve the production efficiency and product quality of screw assembly, and reduce the operation cost and labor intensity. Utility Model Content

[0005] In order to solve the above problems, improve the production efficiency and product quality in the screw fastening process, and reduce the labor intensity, this application provides an automatic screw machine.

[0006] The automatic screw machine provided by this application adopts the following technical solutions:

[0007] An automatic screw machine includes a feeding component, a mold clamping component, a fastening component and a screw feeder; the feeding component includes an operation table and a cover plate table, and the operation table and the cover plate table can move along the Y-axis; the mold clamping component includes a cylinder and a suction nozzle communicated with the cylinder, and the suction nozzle can move along the X-axis and Z-axis directions; the fastening component includes a tool bit and a motor driving the tool bit, the tool bit can move along the X-axis and Z-axis directions, and the motor provides torque around the Z-axis; the screw feeder is arranged in the projection area of the tool bit on the XY plane, the moving ranges of the tool bit and the operation table overlap in the projection area on the XY plane, the moving ranges of the suction nozzle and the operation table and the cover plate table overlap in the projection area on the XY plane, and the moving ranges of the suction nozzle and the tool bit in the Z direction cover the heights where the screw feeder and the feeding component are located.

[0008] Optionally, the fastening component further includes an angular displacement measuring device for controlling the number of rotation turns of the tool bit.

[0009] Optionally, the fastening component further includes a rotation safety device, and when the torque borne by the tool bit is too large, the rotation safety device automatically disconnects the transmission between the tool bit and the motor.

[0010] Optionally, the feeding component includes a feeding carrier seat, the feeding carrier seat can move along the X-axis, and the operation table and the cover plate table are both arranged on the feeding carrier seat.

[0011] Optionally, the upper surfaces of the operation table and the cover plate table are at the same height and have the same Y-axis coordinate.

[0012] Optionally, the screw feeder includes a material bin and a feeding turntable, the feeding turntable can rotate along the axis in the horizontal direction, and the cross-section of the feeding turntable in the plane perpendicular to the axis is circular. A plurality of screw holes facing the center of the circle are formed along the circumferential surface of the feeding turntable, and the screws in the material bin enter the screw holes during the rotation of the feeding turntable.

[0013] Optionally, the screw feeder further includes a slideway, the slideway is arranged below the material bin for receiving the screws in the material bin, the other end of the slideway far from the material bin abuts against the circumferential surface of the feeding turntable, and the part where the slideway abuts against the feeding turntable is higher than the rotation axis of the feeding turntable.

[0014] Optionally, it further includes a debugging handle for controlling the operations of the feeding component, the mold clamping component and the fastening component.

[0015] Optionally, the mold clamping component includes four suction nozzles, the four suction nozzles are located at the four vertices of the same rectangle, and the plane where the rectangle is located is parallel to the XY plane.

[0016] Optionally, the upper surface of the operation table and the cover plate table is recessed with fixing grooves for positioning the material in the X-axis and Y-axis directions.

[0017] In summary, the present application includes the following beneficial technical effects: The mold clamping assembly picks up and clamps the cover plate and the workpiece, the fastening assembly automatically picks up the screws and fastens them to the workpiece according to preset parameters, and the screw feeder realizes the automatic supply of screws. Description of the Drawings

[0018] Figure 1 is a front view of an automatic screw machine according to an embodiment of the present application;

[0019] Figure 2 is a schematic structural diagram of an automatic screw machine according to an embodiment of the present application with some frames omitted;

[0020] Figure 3 is a front view of an automatic screw machine according to an embodiment of the present application with some frames omitted;

[0021] Figure 4 is a top view of an automatic screw machine according to an embodiment of the present application;

[0022] Figure 5 is a sectional view of a screw feeder of an automatic screw machine according to an embodiment of the present application.

[0023] Description of the reference numerals: 1. Loading assembly; 11. Operation table; 12. Cover plate table; 13. Loading carrier; 2. Mold clamping assembly; 21. Cylinder; 22. Suction nozzle; 3. Fastening assembly; 31. Tool bit; 32. Motor; 4. Screw feeder; 41. Bin; 42. Loading turntable; 43. Screw hole; 44. Slideway; 5. Debugging handle; 6. Frame; 61. Frame body; 62. Processing table; 63. Processing carrier; 64. Chain track. Detailed Description of the Embodiment

[0024] The following further describes the present application in detail Figures 1-5 with reference to the accompanying drawings.

[0025] For the directions of the X, Y, and Z axes mentioned in the present application, refer to the coordinate axes shown in the drawings, where the Z axis is the vertical direction, the XY plane is the horizontal plane, and the coordinates of a certain structure described do not mean that the structure is a mass point, but refer to the position of the geometric center of the structure.

[0026] An embodiment of the present application discloses an automatic screw machine.

[0027] Refer to Figure 1 , Figure 2, The automatic screw machine includes a frame 6, a feeding component 1, a mold clamping component 2, a fastening component 3, and a screw feeder 4 provided on the frame 6. The specific technical solution is as follows.

[0028] The frame 6 includes a frame body 61, a processing table 62, and a processing carrier 63. The processing table 62 is fixedly connected to the frame body 61 for carrying the feeding component 1. The processing carrier 63 is movably connected to the frame body 61, and the processing carrier 63 can move along the X-axis and Z-axis directions. Both the mold clamping component 2 and the fastening component 3 are fixedly connected to the processing carrier 63.

[0029] Please refer to Figure 3 , Figure 4 , The feeding component 1 includes a feeding carrier 13, an operating table 11, and a cover plate table 12 fixedly connected to the feeding carrier 13. The feeding carrier 13 is slidably connected to the processing table 62, and the feeding carrier 13 has freedom in the Y-axis direction. Exemplarily, a slide rail extending in the Y-axis direction is provided on the upper surface of the processing table 62, and the feeding carrier 13 is connected to the processing table 62 through the slide rail.

[0030] Preferably, the upper surfaces of the operating table 11 and the cover plate table 12 are at the same height and have the same Y-axis coordinate.

[0031] Preferably, fixing grooves are recessed on the upper surfaces of the operating table 11 and the cover plate table 12 for positioning the materials carried by them in the X-axis and Y-axis directions.

[0032] The mold clamping component 2 includes a cylinder 21 and a suction nozzle 22 communicated with the cylinder 21. The cylinder 21 provides an adsorption force for the suction nozzle 22 to ensure that the suction nozzle 22 can stably pick up and move the workpiece.

[0033] Exemplarily, the suction nozzle 22 is made of flexible silica gel. Four suction nozzles 22 are respectively located at the four vertices of the same rectangle. The plane where the rectangle is located is parallel to the XY plane, and is used to position the four corners of the material to be picked up to ensure the stability of adsorption.

[0034] The fastening component 3 includes a tool bit 31, a motor 32 driving the tool bit 31, an angular displacement measuring device, and a rotation protection device. The tool bit 31 is selected according to the required screws for processing. Preferably, the tool bit 31 itself has magnetism for adsorbing screws. The motor 32 provides torque for the tool bit 31 to rotate around the Z-axis. The angular displacement measuring device is used to control the number of rotation turns of the tool bit 31 to ensure the accuracy of each fastening operation. The rotation protection device automatically disconnects the transmission between the tool bit 31 and the motor 32 when the torque borne by the tool bit 31 is too large, protecting the safety of the equipment and the workpiece. An exemplary rotation protection device is a ratchet sleeve. The motor 32 is fixedly connected to the outer peripheral surface of the ratchet sleeve. The tool bit 31 is driven by the ratchet teeth of the ratchet sleeve. When the tool bit 31 is braked and the torque surges, the ratchet teeth and the ratchet sleeve rotate relative to each other to achieve the insurance effect.

[0035] Please refer to Figure 5 as well. The screw feeder 4 includes a bin 41, a chute 44, a feeding turntable 42, and screw holes 43. The feeding turntable 42 is a flat cylinder that can rotate about an axis in the horizontal direction, and the generatrix of the cylinder is parallel to the XY plane. A plurality of screw holes 43 extending along the axis of the feeding turntable 42 are formed on the circumferential surface of the feeding turntable 42, and the screw holes 43 are circumferentially and arrayedly distributed about the axis of the feeding turntable 42. The number of screw holes 43 can be optionally 4 or 6. An opening is provided below the bin 41, and the chute 44 is inclined. Its higher end is arranged below the bin 41 for receiving the screws flowing out from the opening of the bin 41, and its lower end abuts against the feeding turntable 42. Moreover, the portion where the chute 44 abuts against the feeding turntable 42 is higher than the rotation axis of the feeding turntable 42. The inclination of the chute 44 is such that the screws can slide into the screw holes 43 along the chute 44 under the action of gravity.

[0036] Preferably, the tangent line of the upper surface of the chute 44 at the end close to the feeding turntable 42 passes through the rotation axis of the feeding turntable 42. Preferably, when the opening direction of one of the screw holes 43 is vertically upward, another screw hole 43 just receives the lower end of the chute 44.

[0037] The screw feeder 4 is arranged within the projection area of the tool head 31 in the XY plane. The moving ranges of the tool head 31 and the operation table 11 in the XY plane have an overlapping area. The moving ranges of the suction nozzle 22, the operation table 11, and the cover plate table 12 in the XY plane have an overlapping area. The moving ranges of the suction nozzle 22 and the tool head 31 in the Z direction cover the heights where the screw feeder 4 and the feeding assembly 1 are located. The above movements are all driven by a program and can be realized through slide rails, lead screws, and cylinders 21, which is common knowledge in this field. Therefore, the relevant structures are shown and described in the figure.

[0038] Preferably, the automatic screw machine further includes an adjustment handle 5, and the adjustment handle 5 can be optionally suspended outside the frame body 61, with a height slightly higher than the processing table surface 62.

[0039] Preferably, the automatic screw machine further includes a drag chain. One end of the drag chain is connected to the processing carrier 63, and the other end is connected to the frame body 61, for bundling and guiding the circuits supporting the die closing assembly 2, the fastening assembly 3, and the processing carrier 63, to prevent them from being damaged during the movement of the equipment.

[0040] The implementation principle of an automatic screw machine according to an embodiment of the present application is as follows:

[0041] First, place the workpiece on the operation table 11 and place the cover plate on the cover plate table 12. Optionally, insert pins on the surface of the workpiece, and the upper ends of the pins are higher than the upper surface of the workpiece. Pin holes corresponding to the pins are formed on the cover plate.

[0042] Starting device, the loading carrier 13 moves along the Y-axis, conveying the operating table 11 and the cover plate table 12 to the lower part of the processing carrier 63. The processing carrier 63 moves along the X-axis and Z-axis, making the suction nozzle 22 of the mold clamping assembly 2 move above the cover plate and contact and deform the cover plate. The air cylinder 21 drives the suction nozzle 22 to suck the cover plate. The processing carrier 63 first moves upward so that the lower surface of the cover plate is higher than the upper end of the pin. The processing carrier 63 moves along the X-axis so that the orthographic projection of the cover plate covers the workpiece, and the orthographic projection of the pin hole corresponds to the pin. The processing carrier 63 descends to make the cover plate cooperate with the workpiece, and the pin is inserted into the pin hole. The air cylinder 21 releases pressure to make the pressure between the suction nozzle 22 and the cover plate return to normal pressure, and the processing carrier 63 moves upward.

[0043] The processing carrier 63 moves along the X-axis and Z-axis to insert the tool head 31 into the screw hole 43 to pick up the screw. Subsequently, the processing carrier 63 moves along the X-axis and Z-axis to insert the screw adsorbed by the tool head 31 into the preset screw position of the workpiece. The tool head 31 performs a screw tightening operation driven by the motor 32, and the angular displacement measuring device ensures that the number of turns of the rotation of the tool head 31 is accurate. If the torque is too large, the rotation safety device will automatically disconnect the transmission to protect the equipment.

[0044] While the fastening assembly 3 is working, the feeding turntable 42 of the screw feeder 4 rotates. The screw hole 43 at the top from which the screw has been taken away descends, the screw hole 43 near one end of the slideway 44 with the screw on it ascends, and the empty screw hole 43 further below ascends to be aligned with the slideway 44, and the screw in the slideway 44 falls into the screw hole 43.

[0045] The automatic screw machine of this embodiment realizes efficient and precise screw tightening operations through the coordinated work of multiple components, significantly improving the production efficiency and product quality. The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An automatic screw machine, characterized in that: It comprises a feeding component (1), a mold clamping component (2), a fastening component (3) and a screw feeder (4); The loading assembly (1) comprises an operating table (11) and a cover plate table (12), and the operating table (11) and the cover plate table (12) are movable along the Y axis; The mold clamping assembly (2) comprises a cylinder (21) and a suction nozzle (22) connected to the cylinder (21), and the suction nozzle (22) can move along the X-axis and Z-axis directions; The fastening assembly (3) comprises a cutter head (31) and a motor (32) that drives the cutter head (31), wherein the cutter head (31) can move along the X-axis and the Z-axis, and the motor provides a torque around the Z-axis; The screw feeder (4) is arranged in the projection area of ​​the cutter head (31) on the XY plane, the movement range of the cutter head (31) and the operating table (11) overlap in the projection area of ​​the XY plane, the movement range of the suction nozzle (22) and the operating table (11) and the cover plate table (12) overlap in the projection area of ​​the XY plane, and the movement range of the suction nozzle (22) and the cutter head (31) in the Z direction includes the height of the screw feeder (4) and the loading assembly (1).

2. The automatic screw machine according to claim 1, characterized in that: The fastening assembly (3) also includes an angular displacement metering device for controlling the number of rotations of the cutter head (31).

3. The automatic screw machine according to claim 1, characterized in that: The fastening assembly (3) also includes a rotation safety device, which automatically disconnects the transmission between the cutter head (31) and the motor (32) when the torque borne by the cutter head (31) is too large.

4. The automatic screw machine according to claim 1, characterized in that: The loading assembly (1) comprises a loading carrier (13), the loading carrier (13) is movable along the X-axis, and the operating table (11) and the cover plate table (12) are both arranged on the loading carrier (13).

5. The automatic screw machine according to claim 4, characterized in that: The upper surface of the operating table (11) and the upper surface of the cover plate table (12) are located at the same height, and both have the same Y-axis coordinate.

6. The automatic screw machine according to claim 1, characterized in that: The screw feeder (4) comprises a material bin (41) and a loading turntable (42), wherein the loading turntable (42) can rotate along a horizontal axis, and the cross-section of the loading turntable (42) on a plane perpendicular to the axis is circular, and a plurality of screw holes (43) facing the center of the circle are provided along the circumferential surface of the loading turntable (42), and the screws in the material bin (41) enter the screw holes (43) during the rotation of the loading turntable (42).

7. The automatic screw machine according to claim 6, characterized in that: The screw feeder (4) also includes a slideway (44), which is arranged below the material bin (41) and is used to receive the screws in the material bin (41). The other end of the slideway (44) away from the material bin (41) abuts against the circumferential surface of the loading turntable (42), and the portion where the slideway (44) abuts against the loading turntable (42) is higher than the rotating axis of the loading turntable (42).

8. The automatic screw machine according to any one of claims 1 to 7, characterized in that: It also includes a debugging handle (5), and the debugging handle (5) is used to control the operation of the feeding component (1), the mold clamping component (2) and the fastening component (3).

9. The automatic screw machine according to any one of claims 1 to 7, characterized in that: The mold clamping component (2) comprises four suction nozzles (22), and the four suction nozzles (22) are located at four vertices of the same rectangle, and the plane where the rectangle is located is parallel to the XY plane.

10. The automatic screw machine according to any one of claims 1 to 7, characterized in that: The upper surfaces of the operating table (11) and the cover table (12) are provided with fixing grooves for positioning the material in the X-axis and Y-axis directions.

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