Thread rolling plate of polygonal lock screw
By designing a thread rolling dies for polygonal anti-loosening screws, and using a thread rolling dies body and thread rolling edges with a specific structure, the direct forming of polygonal screw threads is achieved. This solves the problems of single specifications and secondary processing of existing thread rolling dies, and improves production efficiency and the anti-loosening performance of screws.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TAIYA RDP MOULD JIAXING CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-24
AI Technical Summary
Existing thread rolling plates can only process one type of thread at a time, which cannot meet the diverse needs of screw specifications. Furthermore, adding additional functions such as chip removal and anti-loosening requires secondary processing, which is difficult to operate, results in a high defect rate, and low production efficiency.
Design a thread rolling plate for polygonal anti-loosening screws, which adopts two main thread rolling plates. The thread rolling edge includes horizontal and inclined thread rolling surfaces, scraping grooves and forming edge structures. It can form polygonal screw threads in one process, and has chip removal and anti-loosening functions, reducing subsequent processing.
It enables direct forming of polygonal threads, reduces defect rate, improves production efficiency, enhances screw anti-loosening performance and stability, and simplifies the processing flow.
Smart Images
Figure CN224157692U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screw manufacturing technology, and in particular to a thread rolling plate for polygonal anti-loosening screws. Background Technology
[0002] Thread rolling dies are two square templates, one long and one short, used on thread rolling machines to extrude threads from plain screws. They are the most commonly used thread rolling tools in the standard fastener industry for processing screws and bolts. Common thread rolling dies can typically only process one type of thread at a time. However, with advancements in assembly processes, the specifications of screws are also increasing. Screws are now required to provide not only a fastening effect but also other functions, such as chip removal and anti-loosening. Adding these functions requires adding structures to the thread to achieve these effects. Current production processes require rolling one type of thread onto the screw blank, and the remaining structures need to be processed by operators using equipment, resulting in high operational difficulty, high defect rates, and low production efficiency. Utility Model Content
[0003] In view of this, the present invention provides a thread rolling plate for polygonal anti-loosening screws to solve the above-mentioned technical problems.
[0004] A thread-rolling dies for polygonal anti-loosening screws include two thread-rolling dies, each comprising a dies body and multiple thread-rolling ridges disposed on the dies body. Each thread-rolling ridge includes multiple thread-rolling portions and multiple scraping grooves disposed between two thread-rolling portions. Each thread-rolling portion includes a horizontal thread-rolling surface and two inclined thread-rolling surfaces symmetrically disposed on both sides of the horizontal thread-rolling surface. A forming ridge is disposed between every two adjacent thread-rolling ridges. Each forming ridge includes multiple horizontal forming portions and multiple inclined forming portions. The connection point between two adjacent inclined forming portions corresponds to the scraping groove.
[0005] Furthermore, the two tooth plates have end faces with the tooth-rolling edges arranged opposite each other and moving relative to each other.
[0006] Furthermore, the tooth-rolling ridge is arranged along the length direction of the tooth plate body.
[0007] Furthermore, the toothed edge forms an angle with the two sides of the toothed plate body along its length.
[0008] Furthermore, the ends of the two inclined tooth-rolling surfaces that are away from the horizontal tooth-rolling surface are lower than the horizontal tooth-rolling surface.
[0009] Furthermore, the horizontal height of the scraping groove is lower than the minimum height of the inclined tooth-rolling surface.
[0010] Furthermore, each of the horizontal forming parts is connected to the horizontal tooth rolling surfaces on both sides.
[0011] Compared with the prior art, the present invention provides a thread-rolling slab for a polygonal anti-loosening screw by setting two thread-rolling slabs. Each of the two thread-rolling slabs includes a slab body and multiple thread-rolling ridges disposed on the slab body. Each thread-rolling ridge includes multiple thread-rolling portions and multiple scraping grooves disposed between the two thread-rolling portions. Each thread-rolling portion includes a horizontal thread-rolling surface and two inclined thread-rolling surfaces symmetrically disposed on both sides of the horizontal thread-rolling surface. The ends of the two inclined thread-rolling surfaces away from the horizontal thread-rolling surface are lower than the horizontal thread-rolling surface, forming the chip-removing portion on the screw. The horizontal height of the scraping groove is lower than the lowest height of the inclined thread-rolling surface, forming the scraping portion on the screw thread. A forming ridge is provided between every two adjacent thread-rolling ridges. The forming ridge includes multiple horizontal forming portions and multiple inclined forming portions. The connection point of two adjacent inclined forming portions corresponds to the scraping groove, allowing the scraping portion to protrude during thread rolling, thus forming the anti-loosening portion on the surface of the screw. This enhances the stability after screwing with the sheet metal and improves the anti-loosening performance of the screw. Furthermore, it can be used directly after thread rolling without further processing, has low thread rolling error, reduces the defect rate, and improves production efficiency. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of a thread rolling plate for a polygonal anti-loosening screw provided by this utility model.
[0013] Figure 2 for Figure 1 A magnified view of part A of the thread rolling plate of the polygonal anti-loosening screw.
[0014] Figure 3 for Figure 1 A schematic diagram of the finished screw structure of a polygonal anti-loosening screw with a thread rolling plate. Detailed Implementation
[0015] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.
[0016] like Figures 1 to 3 The diagram shows a structural schematic of a thread-rolling slab for a polygonal anti-loosening screw provided by this utility model. The thread-rolling slab for the polygonal anti-loosening screw includes two thread plates 10. It is conceivable that the thread-rolling slab for the polygonal anti-loosening screw also includes other functional structures, such as an anti-rust layer, etc., which are technologies known to those skilled in the art and will not be described in detail here.
[0017] Both of the aforementioned tooth plates 10 include a tooth plate body 11 and a plurality of thread-rolling ridges 12 spaced apart on the tooth plate body 11. The end faces of the two tooth plates 10 having the thread-rolling ridges 12 are arranged opposite to each other and move relative to each other to roll threads 2 on the surface of the screw 1.
[0018] like Figure 3 As shown, the screw is formed by rolling two of the aforementioned tooth plates 10 together. The screw consists of a screw 1, a thread 2, a scraping part 3, an anti-loosening part 4, and a chip removal part 5.
[0019] The main body 11 of the threaded plate is made of a high-hardness, high-wear-resistant metal material to ensure that it can be embedded into the surface of the screw 1 during thread rolling. The thread rolling ridges 12 are arranged along the length direction of the main body 11, and the thread rolling ridges 12 have an angle with the two sides of the length direction of the main body 11, so that multiple thread rolling ridges 12 are inclinedly arranged on one end face of the main body 11, and can form threads 2 with a fixed inclination angle on the surface of the screw 1 during thread rolling.
[0020] The two end faces of the threaded edge 12 are beveled, meaning the gap between two adjacent threaded edges 12 is trapezoidal, thus making the cross-section of the thread 2 trapezoidal, increasing the thickness at the root of the thread 2, and improving the strength of the thread 2. Each threaded edge 12 includes multiple threaded sections 121 and multiple scraping grooves 122, with a scraping groove 122 provided between any two adjacent threaded sections 121. Each threaded section 121 includes a horizontal threaded surface 123 and two inclined threaded surfaces 124 symmetrically arranged on both sides of the horizontal threaded surface 123. The ends of the two inclined thread-rolling surfaces 124 away from the horizontal thread-rolling surface 123 are lower than the height of the horizontal thread-rolling surface 123. That is, on the thread-rolling ridge 12, the height of the horizontal thread-rolling surface 123 is higher than the inclined thread-rolling surfaces 124 on its adjacent sides. Thus, during thread rolling, the horizontal thread-rolling surface 123 and the inclined thread-rolling surface 124 can form the chip-removing portion 5 on the screw. The surface of the chip-removing portion 5 is arc-shaped and concave, so that when it is screwed into the plate, there is a gap between the chip-removing portion 5 and the plate, allowing waste chips to be discharged from the gap. The horizontal height of the scraping groove 122 is lower than the height of the side of the inclined thread-rolling surface 124 away from the horizontal thread-rolling surface 123. Therefore, during thread rolling, the scraping groove 122 will form the scraping portion 3 on the thread 2. The height of the scraping portion 3 is greater than the chip-removing portion 5. Therefore, when screwed into the plate, the scraping portion 3 will first contact the plate and scrape. When the thread-rolling part 121 rolls the thread, since both the horizontal thread-rolling surface 123 and the inclined thread-rolling surface 124 are planar, the cross-section of the thread 2 will be polygonal, and the scraping part 3 is located at the endpoints of this polygon. Furthermore, since the horizontal height of the scraping groove 122 is the lowest, the scraping part 3 formed on the thread 2 is the most prominent, and it can play a role in locking and preventing loosening during tightening.
[0021] Please see Figure 2 A forming ridge 13 is provided between every two adjacent thread-rolling ridges 12. The forming ridge 13 includes multiple horizontal forming portions 131 and multiple inclined forming portions 132. Each horizontal forming portion 131 has an inclined forming portion 132 at both ends, which allows the cross-section of the screw 1 to be extruded into a polygon during thread rolling. (See also...) Figure 2 Each of the horizontal forming portions 131 is connected to the horizontal thread rolling surfaces 123 on both sides, thereby forming a recess on the surface of the screw 1 with the same arc as the thread 2, preventing the surface of the screw 1 from sticking to the plate during screwing, which would prevent chip removal. The connection between two adjacent inclined forming portions 132 corresponds to the scraping groove 122, so that it can protrude corresponding to the scraping portion 3 during thread rolling, that is, forming the anti-loosening portion 4 on the surface of the screw 1, enhancing the stability after screwing with the plate and improving the anti-loosening performance.
[0022] In use, the two toothed plates 10 are fixed to each other on both sides. Then, the screw 1 is placed between the two toothed plates 10. The two toothed plates 10 are driven to move towards each other by an external device, squeezing the screw 1 and making it rotate. The screw 1 is extruded and shaped on the surface of the screw 1 by the tooth-rolling ridges 12 and the forming ridges 13 provided on the toothed plate body 11.
[0023] Compared with the prior art, the present invention provides a thread rolling plate for a polygonal anti-loosening screw by setting two thread rolling plates 10. Each of the two thread rolling plates 10 includes a thread rolling body 11 and multiple thread rolling ridges 12 disposed on the thread rolling body 11. Each thread rolling ridge 12 includes multiple thread rolling portions 121 and multiple scraping grooves 122 disposed between the two thread rolling portions 121. Each thread rolling portion 121 includes a horizontal thread rolling surface 123 and two inclined thread rolling surfaces 124 symmetrically disposed on both sides of the horizontal thread rolling surface 123. The ends of the two inclined thread rolling surfaces 124 away from the horizontal thread rolling surface 123 are lower than the horizontal thread rolling surface 123, forming the chip removal portion 5 on the screw. The horizontal height of the scraping groove 122 is lower than the lowest height of the inclined thread rolling surface 124, forming the scraping portion 3 on the screw thread 2. A forming ridge 13 is provided between every two adjacent thread rolling ridges 12. The forming ridge 13 includes multiple horizontal forming portions 131 and multiple inclined forming portions 132. The connection point of two adjacent inclined forming portions 132 corresponds to the scraping groove 122, so that it can protrude corresponding to the scraping portion 3 during thread rolling, that is, form the anti-loosening portion 4 on the surface of the screw 1, enhancing the stability after screwing with the plate and improving the anti-loosening performance of the screw. Moreover, it can be used directly after thread rolling without further processing, with low thread rolling error, reducing the defect rate and improving production efficiency.
[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.
Claims
1. A thread rolling dies for polygonal anti-loosening screws, characterized in that: The thread-rolling plate of the polygonal anti-loosening screw includes two thread plates, each of which includes a thread plate body and multiple thread-rolling ridges disposed on the thread plate body. Each thread-rolling ridge includes multiple thread-rolling portions and multiple scraping grooves disposed between two thread-rolling portions. Each thread-rolling portion includes a horizontal thread-rolling surface and two inclined thread-rolling surfaces symmetrically disposed on both sides of the horizontal thread-rolling surface. A forming ridge is disposed between every two adjacent thread-rolling ridges. The forming ridge includes multiple horizontal forming portions and multiple inclined forming portions. The connection between two adjacent inclined forming portions corresponds to the scraping groove.
2. The thread rolling dies for polygonal anti-loosening screws as described in claim 1, characterized in that: The two tooth plates have end faces of the tooth-rolling edge that are positioned opposite each other and can move relative to each other.
3. The thread rolling dies for polygonal anti-loosening screws as described in claim 1, characterized in that: The tooth-rolling ridge is set along the length direction of the tooth plate body.
4. The thread rolling dies for polygonal anti-loosening screws as described in claim 1, characterized in that: The toothed edge forms an angle with the two sides of the toothed plate body along its length.
5. The thread rolling dies for polygonal anti-loosening screws as described in claim 1, characterized in that: The ends of the two inclined tooth-rolling surfaces that are away from the horizontal tooth-rolling surface are lower than the horizontal tooth-rolling surface.
6. The thread rolling dies for polygonal anti-loosening screws as described in claim 1, characterized in that: The horizontal height of the scraping groove is lower than the minimum height of the inclined tooth-rolling surface.
7. The thread rolling dies for polygonal anti-loosening screws as described in claim 1, characterized in that: Each of the horizontal forming parts is connected to the horizontal tooth rolling surfaces on both sides.