Thread rolling plate for producing self-locking and high-cuttability screws

Abstract

A thread rolling plate for producing screws with self-locking and high cutting performance comprises a main thread plate and an auxiliary thread plate. A thread rolling part and a chip removal part are arranged on the main thread plate and the auxiliary thread plate. And the thread rolling part comprises a thread rolling groove and a thread rolling edge. The main tooth plate and the auxiliary tooth plate are provided with a collecting part, a shaping part, a first double-tooth groove and a second double-tooth groove. The first double alveolar socket includes a first alveolar socket, and a first plane. The second double alveolar socket includes a second alveolar socket, and a second plane. The first double-tooth grooves are formed in the constriction part and the shaping part. The depth of the first tooth groove is set to be smaller than the depth of the thread rolling groove, auxiliary cutting is formed on the surface of the self-tapping part, and the cutting performance of the screw is improved. The depth of the second tooth groove is the same as that of the tooth rubbing groove, the self-locking part is formed on the thread, the friction force between the screw and wood is increased, and the self-locking performance of the screw is improved.

Description

Technical Field

[0001] This utility model relates to the field of thread rolling mold technology, and in particular to a thread rolling mold for producing self-locking and high-chipping screws. Background Technology

[0002] The toothed plate mold consists of two rectangular templates on the toothed rolling machine. One is the main toothed plate, which is fixedly set on the structure, and the other is the auxiliary toothed plate, which is installed on the horizontal drive mechanism. Both the main toothed plate and the auxiliary toothed plate are provided with threads. The bolt is placed between the main toothed plate and the auxiliary toothed plate, and the auxiliary toothed plate is driven to move laterally, forcing the bolt to be squeezed and rolled between the main toothed plate and the auxiliary toothed plate, thus completing the thread on the outer wall of the bolt.

[0003] However, existing screw threads have poor cutting performance when driven into wood, making it difficult to screw them in quickly. Furthermore, single-type screw threads also suffer from poor self-locking properties. There are methods to improve the cutting performance of screws by adding additional threads to the existing threaded parts. However, current equipment often only produces one type of thread at a time. If different types of threads are needed, they must be processed separately, resulting in a high defect rate. Utility Model Content

[0004] In view of this, the present invention provides a thread rolling dies for producing screws with self-locking and high chipping properties, in order to solve the above-mentioned technical problems.

[0005] A thread rolling slab for producing self-locking and high-chip-resistance screws includes a main thread rolling slab and a secondary thread rolling slab. Each of the main and secondary thread rolling slabs has a thread rolling section on its opposite end face and a chip removal section inclined along one side of the length of the main and secondary thread rolling slabs. The thread rolling section includes multiple thread rolling grooves inclined along a gathering section and a shaping section, and multiple thread rolling ridges between every two thread rolling grooves. Along the chip removal section from the chip removal section on the main and secondary thread rolling slabs, a gathering section, a shaping section, multiple sets of first double thread grooves on the gathering and shaping sections, and multiple sets of second double thread grooves on the shaping section away from the gathering section are sequentially arranged. Each set of first double thread grooves includes two staggered first thread grooves and two first planes respectively located at the bottom of the two first thread grooves. Each set of second double thread grooves includes two staggered second thread grooves and two second planes respectively located at the bottom of the two second thread grooves.

[0006] Furthermore, the length of the main tooth plate is less than the length of the auxiliary tooth plate.

[0007] Furthermore, a discharge end is provided on one side of the main tooth plate.

[0008] Furthermore, the side of the discharge end near the length end of the main toothed plate is inclined at a 10-degree angle to the horizontal plane.

[0009] Furthermore, the cross-section of the tooth-rolling ridge disposed on the shaping section away from the discharge end is triangular.

[0010] Furthermore, the cross-section of the tooth-rolling ridge located in the middle region of the shaping section to the discharge end is trapezoidal.

[0011] Furthermore, the depth of the first alveolar groove is less than the depth of the frenulum.

[0012] Furthermore, the depth of the second alveolar groove is the same as the depth of the frenulum.

[0013] Compared with the prior art, the present invention provides a thread rolling die for producing screws with self-locking and high cutting performance by providing a set of first double thread grooves on the converging portion and the shaping portion. The first double thread groove includes two staggered first thread grooves and two first planes respectively disposed at the bottom of the two first thread grooves. The depth of the first thread grooves is set less than the depth of the thread rolling grooves, forming a surface on the self-tapping portion to assist cutting and increase the screw's cutting performance. A set of second double thread grooves is provided on the side of the shaping portion away from the converging portion. The second double thread grooves include two staggered second thread grooves and two second planes respectively disposed at the bottom of the two second thread grooves. The depth of the second thread grooves is the same as the depth of the thread rolling grooves, forming a self-locking portion on the screw threads to increase friction with the wood and improve the screw's self-locking performance. Attached Figure Description

[0014] Figure 1 This utility model provides a structural schematic diagram of a thread rolling plate for producing screws with self-locking and high chipping properties.

[0015] Figure 2 for Figure 1 A partial enlarged view of part A of the thread rolling plate used in the production of self-locking and high-chipping screws.

[0016] Figure 3 A schematic diagram of the structure of screws produced using a thread rolling die that produces self-locking and highly scalable screws. Detailed Implementation

[0017] 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.

[0018] like Figures 1 to 3The diagram shows a structural schematic of a thread rolling dies for producing self-locking and high-chip-resistance screws, as provided by this utility model. The thread rolling dies for producing self-locking and high-chip-resistance screws include a main thread plate 10 and a secondary thread plate 20. It is conceivable that the thread rolling dies for producing self-locking and high-chip-resistance screws also include other functional structures, such as a rust-proof layer, etc., which are technologies well known to those skilled in the art and will not be described in detail here.

[0019] Both the main tooth plate 10 and the auxiliary tooth plate 20 are made of metal materials, such as stainless steel. The length of the main tooth plate 10 is shorter than the length of the auxiliary tooth plate 20, thereby ensuring that the tooth rolling is thorough and complete. The length structure between the main tooth plate 10 and the auxiliary tooth plate 20 is existing technology and will not be described in detail here.

[0020] like Figure 3 As shown, the screw is formed by rolling the main thread plate 10 and the auxiliary thread plate 20 together. The screw consists of a screw 1, a thread 2, a self-tapping part 3, a cutting part 4, and a self-locking part 5.

[0021] A discharge end 11 is provided at one end of the length of the main tooth plate 10. The side of the discharge end 11 near the end of the length of the main tooth plate 10 is inclined at a 10-degree angle to the horizontal plane to guide the screws formed during machining out of the main tooth plate 10.

[0022] Please see Figure 1 Each of the main tooth plate 10 and the auxiliary tooth plate 20 has a tooth-rolling section 12 and a chip-removing section 13 inclined along one side of the length of the main tooth plate 10 and the auxiliary tooth plate 20, respectively. On the side of the tooth-rolling section 12 away from the chip-removing section 13, a converging section 14, a shaping section 15, multiple sets of first double tooth grooves 16 on the converging section 14 and the shaping section 15, and multiple sets of second double tooth grooves 17 on the side of the shaping section 15 away from the converging section 14 are arranged sequentially. Multiple rows of anti-slip grooves 111 are spaced apart on the end of the shaping section 15 away from the discharge end 11 of the main tooth plate 10 and the auxiliary tooth plate 20. Each row of anti-slip grooves 111 is perpendicular to the central axis of the length of the main tooth plate 10 and the auxiliary tooth plate 20, and the area of ​​the anti-slip groove 111 is half the length of the shaping section 15 away from the discharge end 11. The anti-slip groove 111 is used to prevent the screw 1 (see reference) from slipping. Figure 3 Tilt it while rubbing your teeth.

[0023] The tooth-rolling section 12 includes multiple tooth-rolling grooves 121 inclinedly disposed on the converging section 14 and the shaping section 15, and multiple tooth-rolling ridges 122 disposed between every two tooth-rolling grooves 121. The tooth-rolling grooves 121 and tooth-rolling ridges 122 cooperate with each other on the screw 1 (see...). Figure 3The screw 1 is rolled into threads 2. The anti-slip groove 111 is provided on the thread rolling edge 122 so that the screw 1 can be embedded in the anti-slip groove 111 during thread rolling to prevent it from tilting.

[0024] The chip removal section 13 is used to remove excess iron filings during thread rolling, preventing iron filings from remaining between the main thread plate 10 and the auxiliary thread plate 20 and affecting the thread rolling accuracy. The main thread plate 10 is provided with a 10-degree inclination at the end of the chip removal section 13 near the side, which facilitates the sliding out of the shaped screw. The chip removal section 13 is a prior art and will not be described in detail here.

[0025] The converging portion 14 gradually rises above the horizontal plane at the connection with the shaping portion 15, making the end face of the converging portion 14 inclined. When the end faces of the main tooth plate 10 and the auxiliary tooth plate 20 with the thread rolling portion 12 are in contact with each other, there is an acute angle between the end faces of the two converging portions 14. During thread rolling, the end of the screw 1 can be rolled into a cone shape, and the self-tapping portion 3 is rolled out on the screw 1 to improve the self-tapping performance of the screw.

[0026] The thread-rolling ridge 122 located on the shaping section 15 away from the discharge end 11 has a triangular cross-section, which is embedded into the screw surface during thread rolling. The thread-rolling ridge 122 located in the middle region of the shaping section 15 to the discharge end 11 has a trapezoidal cross-section. That is, from the side away from the discharge end 11, the cross-section of the thread-rolling ridge 122 gradually changes from triangular to trapezoidal, thereby expanding the groove through the thread-rolling ridge 122. The thread-rolling groove 121 accommodates the screw 1 surface material squeezed by the thread-rolling ridge 122, thereby gradually forming a complete thread 2 on the screw 1 surface.

[0027] A portion of the first double-tooth groove 16 is disposed on the converging portion 14, and another portion is disposed on the shaping portion 15. Each set of first double-tooth grooves 16 includes two staggered first tooth grooves 161 and two first planes 162 respectively disposed at the furthest point from the horizontal plane of the two first tooth grooves 161. The depth of the first tooth groove 161 is less than the depth of the tooth groove 121, forming a cutting portion 4 on the self-tapping portion 3. The staggered arrangement of the two first tooth grooves 161 can form multi-directional cutting paths in the wood, and the first planes 162 can form multiple cutting edges, increasing the cutting efficiency of the self-tapping portion 4. When the screw is driven into the wood, its thread 2 firstly cuts the wood. Subsequently, the multiple cutting edges on the cutting portion 4 scrape and enlarge the inner wall of the hole in the wood, reducing the resistance when the thread is screwed in, helping to better disperse the cutting force, reducing local compression and deformation of the wood, further improving the cutting efficiency of the self-tapping portion 4, and making it easier for the screw to be screwed into the wood.

[0028] The second double groove 17 includes two staggered second grooves 171 and two second planes 172 respectively located at the furthest points from the horizontal plane of the two second grooves 171. The depth of the second groove 171 is the same as the depth of the threaded groove 121. A self-locking part 5 is formed at the end of the thread 2 away from the self-tapping part 3, and the height of the self-locking part 5 is the same as the height of the thread 2. When screwed into the wood, the self-locking part 5 contacts the inner wall of the hole. The second plane 172 increases the contact area between the self-locking part 5 and the inner wall of the hole, thereby increasing the contact area with the wood, improving friction, and thus better resisting external vibration and impact, reducing the possibility of loosening.

[0029] Compared with the prior art, the present invention provides a thread rolling die for producing screws with self-locking and high cutting performance by providing a set of first double thread grooves 16 on the converging portion 14 and the shaping portion 15. The first double thread grooves 16 include two staggered first thread grooves 161 and two first planes 162 respectively disposed at the bottom of the two first thread grooves 161. The depth of the first thread grooves 161 is set less than the depth of the thread rolling grooves 121, forming a surface on the self-tapping portion 4 for auxiliary cutting, thereby increasing the screw's cutting performance. A set of second double thread grooves 17 is provided on the side of the shaping portion 15 away from the converging portion 14. The second double thread grooves 17 include two staggered second thread grooves 171 and two second planes 172 respectively disposed at the bottom of the two second thread grooves 171. The depth of the second thread grooves 171 is the same as the depth of the thread rolling grooves 121, forming the self-locking portion 5 on the screw thread 2, increasing the friction between the screw and the wood, and improving the screw's self-locking performance.

[0030] 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 producing self-locking and high-chip-resistance screws, characterized in that: The thread rolling dies for producing self-locking and high-chip-resistance screws include a main thread rolling die and a secondary thread rolling die. Each of the main and secondary thread rolling dies has a thread rolling section on its opposite end face, and a chip removal section inclined along one side of the length of the main and secondary thread rolling dies. Along the chip removal section, the thread rolling sections on the main and secondary thread rolling dies have, in sequence, a converging section, a shaping section, multiple sets of first double grooves on the converging and shaping sections, and multiple sets of second double grooves on the shaping section away from the converging section. Each first double groove includes two staggered first grooves and two first planes respectively located at the bottom of the two first grooves. Each second double groove includes two staggered second grooves and two second planes respectively located at the bottom of the two second grooves. The thread rolling section includes multiple thread rolling grooves inclined along the converging and shaping sections, and multiple thread rolling ridges between every two thread rolling grooves.

2. The thread rolling dies for producing self-locking and high-chipping screws as described in claim 1, characterized in that: The length of the main tooth plate is less than the length of the auxiliary tooth plate.

3. The thread rolling dies for producing self-locking and high-chipping screws as described in claim 1, characterized in that: A discharge end is provided on one side of the main tooth plate.

4. The thread rolling dies for producing self-locking and high-chipping screws as described in claim 3, characterized in that: The discharge end is inclined at a 10-degree angle to the horizontal plane on the side near the length end of the main tooth plate.

5. The thread rolling dies for producing self-locking and high-chipping screws as described in claim 3, characterized in that: The cross-section of the tooth-rolling ridge located on the shaping section away from the discharge end is triangular.

6. The thread rolling dies for producing self-locking and high-chipping screws as described in claim 3, characterized in that: The cross-section of the tooth-rolling ridge located in the middle region of the shaping section to the discharge end is trapezoidal.

7. The thread rolling dies for producing self-locking and high-chipping screws as described in claim 1, characterized in that: The depth of the first alveolar groove is less than the depth of the frenulum groove.

8. The thread rolling dies for producing self-locking and high-chipping screws as described in claim 1, characterized in that: The depth of the second alveolar groove is the same as the depth of the frenulum groove.

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