A headless screw thread rolling device

Abstract

The application relates to the technical field of screw processing, in particular to a countersunk screw thread rolling device, which comprises a feeding assembly, a thread rolling assembly, a material collecting assembly and a motor box. The thread rolling assembly comprises a rack, two oppositely arranged thread rolling rollers and a limiting channel. The two thread rolling rollers and the limiting channel are fixed on the rack. The limiting channel and the two thread rolling rollers are arranged in a V-shaped structure in the vertical direction. The two thread rolling rollers are connected with the motor box through a shaft coupling. One end of the limiting channel is connected with the feeding assembly, and the other end of the limiting channel is connected with the material collecting assembly. The limiting channel and the two thread rolling rollers form a V-shaped layout, three-way positioning of materials is realized, and deformation or error caused by axial deviation is reduced. The application has the characteristics of improving the yield of countersunk screws.

Description

Technical Field

[0001] This application relates to the field of screw processing technology, and in particular to a countersunk screw thread rolling device. Background Technology

[0002] The core function of countersunk screws lies in their special head design, which simultaneously solves three major problems: surface flatness, safety protection, and motion interference, making them an indispensable fastening solution in the fields of machinery, construction, and consumer goods.

[0003] In related technologies, screw thread rolling is one of the main processes for thread forming. It is widely used in the production of standard screws, bolts and other fasteners. At present, thread rolling equipment generally adopts the double roller radial extrusion forming process and relies on high-precision synchronous control of thread lead.

[0004] The existing countersunk screw rolling devices have the following problems: the unique flat end face structure of countersunk screws lacks axial reference during the rolling process, resulting in excessive deviation between the thread and the head coaxiality, which can easily cause thread lead error or head deformation, reducing the yield rate. Summary of the Invention

[0005] To improve the yield of countersunk screws, this application provides a countersunk screw thread rolling device.

[0006] The countersunk screw thread rolling device provided in this application adopts the following technical solution: A countersunk screw thread rolling device includes: a feeding assembly, a thread rolling assembly, a receiving assembly, and a motor housing. The thread rolling assembly includes a frame, two opposing thread rolling rollers, and a limiting channel. The two thread rolling rollers and the limiting channel are fixed to the frame. The limiting channel and the two thread rolling rollers are arranged in a V-shape in the vertical direction. The two thread rolling rollers are connected to the motor housing via a coupling. One end of the limiting channel is connected to the feeding assembly, and the other end of the limiting channel is connected to the receiving assembly.

[0007] By adopting the above scheme, the feeding assembly automatically conveys the countersunk screw blanks into the limiting channel. The motor box synchronously drives two opposing threaded rollers to rotate in the same direction through the coupling. When the material passes through the threaded rollers, the surface is squeezed to form threads. Then, it slides into the receiving assembly through the end of the limiting channel. The limiting channel, together with the two threaded rollers, forms a V-shaped layout, realizing the three-dimensional physical limiting of the material and continuously guiding the axial feeding of the material, reducing the deformation or error caused by axial deviation, thereby improving the yield of countersunk screws.

[0008] Preferably, the limiting channel includes a closed section and an open section. The closed section is connected to the feeding assembly, and the open section is connected to the closed section and located below the two toothed rollers, i.e., the radial extrusion area of ​​the toothed rollers.

[0009] By adopting the above scheme, the countersunk screw blank is first stably guided and conveyed in the closed section, and then it is synchronously radially extruded and formed by double toothed rollers after entering the open section. The open section makes it easy to observe the forming process and remove chips in time. This structural design improves the forming quality while achieving lightweighting and reduces the occurrence of cutting accumulation.

[0010] Preferably, at least a portion of each side of the open section is tangent to the two toothed rollers.

[0011] By adopting the above scheme, the countersunk screw blank always maintains the theoretical contact point with the double toothed rollers, reducing the radial runout of the material, indirectly improving the toothed accuracy, and reducing the contact loss between the toothed rollers and the open section of the limiting channel, thus extending the service life.

[0012] Preferably, the limiting channel allows only a single countersunk screw blank to pass through at a time in the width direction.

[0013] By adopting the above scheme, the countersunk screw blank can achieve axial self-centering during the conveying process, and the occurrence of jamming or processing interference caused by parallel double materials is reduced, which indirectly improves the efficiency and stability of thread rolling.

[0014] Preferably, the feeding assembly includes a vibratory feeder and a conveying pipe, the conveying pipe being hollow and connected to the vibratory feeder, and the outlet end of the conveying pipe being embedded in the inlet of the closed section.

[0015] By adopting the above scheme, the vibratory feeder uses directional vibration to arrange the bulk countersunk screw blanks in an orderly manner, and the hollow structure of the conveying pipe forms a one-way channel, realizing a fully enclosed transition from the vibratory feeder to the closed section of the limiting channel, reducing the occurrence of material deviation or falling.

[0016] Preferably, it also includes a vibrator, which is positioned below the connection between the delivery pipe and the closed section.

[0017] By adopting the above scheme, the vibrator plays the role of buffering vibration transmission and stabilizing the connection structure, ensuring that the material maintains a stable conveying posture at the connection between the conveying pipe and the closed section of the limiting channel.

[0018] Preferably, the receiving assembly includes a dropping plate and a receiving box. The dropping plate is inclined downwards toward the ground, one end of the dropping plate is connected to the outlet of the open section, and the other end of the dropping plate is connected to the top of the receiving box.

[0019] By adopting the above solution, the blanking plate uses gravity acceleration to make the finished countersunk screws slide naturally into the receiving box without the need for additional power.

[0020] Preferably, it also includes a lubrication assembly, which includes a water pipe and a water tank. The water pipe is fixed above the frame, and the outlet of the water pipe is directly opposite the open section. The water tank is fixed below the frame. The water pipe and the water tank are used for spraying and receiving metal cutting fluid, respectively.

[0021] By adopting the above scheme, the metal cutting fluid flows from top to bottom to remove heat from the hobbing zone, while penetrating to the contact surface between the hobbing roller and the open section to form a lubricating film, reducing frictional resistance, and promptly flushing away metal chips and powder, reducing the occurrence of residues scratching the machining surface or clogging the equipment.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The limiting channel, together with two toothed rollers, forms a V-shaped layout to achieve three-dimensional physical limiting of the material and continuously guide the axial feed of the material, reducing deformation or error caused by axial deviation, thereby improving the yield of countersunk screws. 2. Improved the processing efficiency and stability of the device; 3. It reduces the occurrence of jamming or residue buildup that could scratch the equipment, extends the service life of related components, and reduces maintenance costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the overall structure of the tooth rolling assembly according to an embodiment of this application.

[0025] Figure 3 This is a schematic diagram illustrating the cooperative relationship between the feeding component, the limiting channel, and the receiving component in an embodiment of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Motor housing; 11. Coupling; 2. Receiving assembly; 21. Drop plate; 22. Receiving box; 3. Lubrication assembly; 31. Water pipe; 32. Water tank; 4. Feeding assembly; 41. Vibratory feeder; 411. Spiral track; 42. Conveying pipe; 43. Flat vibrator; 5. Gear rolling assembly; 51. Frame; 52. Gear rolling roller; 53. Limiting channel; 531. Closed section; 532. Open section. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0028] This application discloses a countersunk screw thread rolling device. (Refer to...) Figure 1-3 A countersunk screw rolling device includes a feeding assembly 4, a rolling assembly 5, a receiving assembly 2, and a motor housing 1. The rolling assembly 5 includes a frame 51, two opposing rolling rollers 52, and a limiting channel 53. The two rolling rollers 52 and the limiting channel 53 are all mounted on the frame 51 and arranged in a V-shape in the vertical direction. The frame 51 plays a role in bearing and positioning the rolling rollers 52 and the limiting channel 53.

[0029] Furthermore, in this embodiment, both toothed rollers 52 are connected to the motor housing 1 via a coupling 11. The two ends of the coupling 11 are respectively hinged to the ends of the toothed rollers 52 and the outer wall of the motor housing 1. Meanwhile, one end of the limiting channel 53 is connected to the feeding assembly 4, and the other end is connected to the receiving assembly 2.

[0030] Therefore, the feeding assembly 4 is responsible for conveying the countersunk screw blank to the limiting channel 53 to ensure continuous feeding. The motor box 1, with the help of the coupling 11, drives two sets of symmetrically arranged thread rolling rollers 52 to rotate in the same direction. When the countersunk screw blank passes through the gap of the high-speed rotating thread rolling rollers 52, its surface forms a precision thread through plastic deformation under rigid contact. Finally, it slides from the end of the limiting channel 53 into the receiving assembly 2, completing the fully automatic processing and loading / unloading process of the countersunk screw thread rolling process.

[0031] Specifically, the limiting channel 53 provides an axial reference for the countersunk screw blank through physical restriction and continuously guides the material feed. It also works with two threaded rollers 52 to form a V-shaped layout, achieving three-point precise positioning. This reduces the occurrence of the situation where the countersunk screw is subjected to only radial extrusion force during processing, which would cause the coaxiality deviation between the flat end and the threaded section. In this way, deformation or error is reduced, and the yield of countersunk screws is improved.

[0032] In the process described above, the limiting channel 53 includes a closed section 531 and an open section 532. The closed section 531 is connected to the feeding assembly 4, and the open section 532 is connected to the closed section 531 and located below the two toothed rollers 52, that is, the radial extrusion area of ​​the toothed rollers 52.

[0033] Therefore, the limiting channel 53 forms a segmented structure, wherein the closed section 531 is used to stably guide and convey the countersunk screw blank, and the material is subjected to synchronous radial extrusion by the toothed rollers 52 on the left and right sides after entering the open section 532, thereby completing the cold forming of the thread.

[0034] Furthermore, the open section 532 facilitates observation of the thread forming quality and timely removal of metal friction debris, reducing the occurrence of cutting accumulation and improving the convenience and safety of the device.

[0035] Furthermore, at least a portion of each side of the open section 532 is tangent to the two toothed rollers 52, ensuring that the countersunk screw blank always maintains the theoretical contact point with the double toothed rollers 52. This reduces the radial runout of the material and indirectly improves the toothed accuracy. At the same time, the open section 532 achieves axial guidance and auxiliary feeding of the material through physical limiting in the toothed area. The tangent structure also reduces the contact loss between the toothed rollers 52 and the open section 532, extending the service life.

[0036] Meanwhile, the limiting channel 53 allows only a single countersunk screw blank to pass through in the width direction at a time, realizing single-row queuing and orderly conveying of materials, thereby reducing lateral offset and enabling axial self-positioning calibration.

[0037] Furthermore, the limiting channel 53 also reduces the occurrence of material jamming or processing interference caused by parallel double-material operation through the narrow groove structure, indirectly improving the efficiency and stability of tooth rolling.

[0038] On the other hand, the feeding assembly 4 includes a vibratory feeder 41 and a conveying pipe 42. The conveying pipe 42 is hollow and connected to the vibratory feeder 41. The outlet end of the conveying pipe 42 is embedded in the inlet of the closed section 531.

[0039] Furthermore, in this embodiment, a spiral track 411 is connected to the side wall of the vibratory feeder 41. One end of the spiral track 411 is directly opposite the inlet end of the conveying pipe 42. The radius of the conveying pipe 42 is only large enough to accommodate one countersunk screw blank at a time.

[0040] Therefore, the vibratory plate 41 performs compound vibration by precisely controlling its own vibration frequency and amplitude, forming a power source for the material to rise along the spiral track 411 on the inner wall of the vibratory plate 41. The spiral track 411 is designed with a special inclination angle, which enables the countersunk screw blank to overcome frictional resistance and continue to advance under the action of inertia.

[0041] Furthermore, the hollow structure of the conveying pipe 42 forms a one-way channel, and the countersunk screw blank achieves a fully enclosed and orderly transition from the vibrating plate 41 to the closed section 531 of the limiting channel 53 under the action of compound vibration, effectively reducing the occurrence of material deviation or falling.

[0042] Simultaneously, it also includes a vibrator 43, which is located below the connection between the conveying pipe 42 and the closed section 531. Therefore, the vibrator 43 absorbs the mechanical vibration energy transmitted by the vibrating plate 41 through internal elastic material or hydraulic damping, and reduces the amplitude fluctuation at the connection between the conveying pipe 42 and the closed section 531 of the limiting channel 53, so that the countersunk screw blank maintains a stable conveying posture. At the same time, the vibrator 43 can offset the structural stress caused by the impact force of the material and the self-weight of the pipe, reduce the occurrence of displacement or loosening at the connection due to long-term vibration, thereby maintaining the geometric accuracy and reliability of the device in long-term operation.

[0043] On the other hand, the receiving assembly 2 includes a dropping plate 21 and a receiving box 22. The dropping plate 21 is inclined downward toward the ground. One end of the dropping plate 21 is connected to the outlet of the open section 532, and the other end is connected to the top of the receiving box 22. The dropping plate 21 uses gravity acceleration to make the finished countersunk screws slide naturally into the receiving box 22 without additional power.

[0044] In addition, it also includes a lubrication assembly 3, which includes a water pipe 31 and a water tank 32. The water pipe 31 is fixed above the frame 51 and the outlet of the water pipe 31 is directly opposite the open section 532. The water tank 32 is fixed below the frame 51. The water pipe 31 and the water tank 32 are used to spray and receive metal cutting fluid, respectively.

[0045] Therefore, the metal cutting fluid carries away the accumulated heat in the processing area of ​​the device by flowing from top to bottom. At the same time, the liquid penetrates to the contact surface between the toothed roller 52 and the open section 532 to form a lubricating film, thereby reducing frictional resistance and timely flushing away metal chips and powder, reducing the occurrence of residues scratching the processing surface or clogging the equipment, and extending the service life.

[0046] The implementation principle of the countersunk screw thread rolling device in this application embodiment is as follows: the vibratory plate 41, together with the conveying pipe 42 and the flat vibrator 43, conveys the countersunk screw blank to the limiting channel 53. The motor box 1 drives two sets of symmetrically arranged thread rolling rollers 52 to rotate in the same direction through the coupling 11. The limiting channel 53 and the two thread rolling rollers 52 form a V-shaped layout. When the countersunk screw blank passes through the gap of the high-speed rotating thread rolling rollers 52, the material is physically limited in three directions. Its surface forms a precision thread through plastic deformation under rigid contact. Then, it falls from the end of the limiting channel 53 along the drop plate 21 into the receiving box 22, which reduces the deformation or error caused by axial deviation, thereby improving the yield of countersunk screws.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A countersunk screw thread rolling device, characterized in that, The assembly includes a feeding component (4), a toothed roller assembly (5), a receiving component (2), and a motor housing (1). The toothed roller assembly (5) includes a frame (51), two opposing toothed rollers (52), and a limiting channel (53). The two toothed rollers (52) and the limiting channel (53) are fixed on the frame (51). The limiting channel (53) and the two toothed rollers (52) are arranged in a V-shape in the vertical direction. The two toothed rollers (52) are connected to the motor housing (1) through a coupling (11). One end of the limiting channel (53) is connected to the feeding component (4), and the other end of the limiting channel (53) is connected to the receiving component (2).

2. The countersunk screw thread rolling device according to claim 1, characterized in that, The limiting channel (53) includes a closed section (531) and an open section (532). The closed section (531) is connected to the feeding assembly (4), and the open section (532) is connected to the closed section (531) and located below the two toothed rollers (52), that is, the radial extrusion area of ​​the toothed rollers (52).

3. The countersunk screw thread rolling device according to claim 2, characterized in that, At least a portion of each side of the open section (532) is tangent to the two toothed rollers (52).

4. The countersunk screw thread rolling device according to claim 3, characterized in that, The limiting channel (53) allows only a single countersunk screw blank to pass through at a time in the width direction.

5. The countersunk screw thread rolling device according to claim 4, characterized in that, The feeding assembly (4) includes a vibratory plate (41) and a conveying pipe (42). The conveying pipe (42) is hollow and connected to the vibratory plate (41). The outlet end of the conveying pipe (42) is embedded in the inlet of the closed section (531).

6. The countersunk screw thread rolling device according to claim 5, characterized in that, It also includes a transducer (43) which abuts below the connection between the delivery pipe (42) and the closed section (531).

7. The countersunk screw thread rolling device according to claim 2, characterized in that, The receiving assembly (2) includes a dropping plate (21) and a receiving box (22). The dropping plate (21) is inclined downward toward the ground. One end of the dropping plate (21) is connected to the outlet of the open section (532), and the other end of the dropping plate (21) is connected to the top of the receiving box (22).

8. The countersunk screw thread rolling device according to claim 2, characterized in that, It also includes a lubrication assembly (3), which includes a water pipe (31) and a water tank (32). The water pipe (31) is fixed above the frame (51), and the outlet of the water pipe (31) is directly opposite the open section (532). The water tank (32) is fixed below the frame (51). The water pipe (31) and the water tank (32) are used to spray and receive metal cutting fluid, respectively.

Images