Tooth plate for producing self-tapping tensile screw

Abstract

A dental plate for producing a self-tapping tensile screw comprises a main dental plate and an auxiliary dental plate. A plurality of rhombic concave faces are arranged on the end faces of one sides of the main tooth plate and the auxiliary tooth plate, a plurality of tooth rolling grooves are obliquely formed in the rhombic concave faces, and the inclination angles and the inclination directions of the tooth rolling grooves in the main tooth plate and the auxiliary tooth plate are the same. The head and the tail of each thread rolling groove penetrate through the two end faces of the main thread plate and the two end faces of the auxiliary thread plate, and the main thread plate and the auxiliary thread plate are oppositely arranged and move in the opposite directions. Therefore, a coherent rhombic surface is formed on a spiral blank during thread rolling. And a plurality of tooth rolling grooves are obliquely arranged on the rhombic concave surfaces which are connected end to end. And the plurality of thread rolling grooves are arranged in parallel at intervals. Therefore, the thread and the tensile structure can be machined at the same time through one working procedure, secondary machining is avoided, and the production efficiency is high. And the size of a screw machined through the dental plate is fixed, and the yield is high.

Description

Technical Field

[0001] The utility model relates to the technical field of screw thread plates, in particular to a thread plate used for producing self-tapping tensile screws. Background Art

[0002] Thread rolling plate - two square templates on the thread rolling machine, divided into two pieces, one long and one short, with teeth on them, used to extrude screws into threads. Thread rolling plates are the most commonly used thread tools for processing screws and bolts in the standard fastener industry. Commonly used thread rolling plates can usually only process one specification of thread at a time. With the improvement of assembly technology, the specifications of screws are also improving. And screws with two specifications of thread have been derived, but most of the existing production processes require one specification of thread to be rubbed out on the screw embryo first, and the second specification of thread needs to be processed by turning by processing personnel, which is difficult to operate, low production efficiency, and has a high defective rate. Utility Model Content

[0003] In view of this, the utility model provides a thread plate for producing self-drilling tensile screws to solve the above technical problems.

[0004] A thread plate for producing self-drilling tensile screws, comprising a main thread plate and a secondary thread plate, wherein a plurality of rhombus-shaped concave surfaces are arranged on one side end surface of the main thread plate and the secondary thread plate, and a plurality of thread rolling grooves are arranged obliquely on the rhombus-shaped concave surfaces, wherein the thread rolling grooves on the main thread plate and the secondary thread plate have the same inclination angle and inclination direction, and the beginning and end of each thread rolling groove pass through the two end surfaces of the main thread plate and the secondary thread plate, and the main thread plate and the secondary thread plate are arranged relative to each other and move toward each other.

[0005] Furthermore, the length of the primary tooth plate is smaller than the length of the secondary tooth plate.

[0006] Furthermore, a plurality of the rhombus-shaped concave surfaces are connected end to end.

[0007] Furthermore, each rhombus-shaped concave surface is composed of four oppositely arranged triangular inclined surfaces.

[0008] Furthermore, a plane is provided through the middle of each tooth-rolling groove.

[0009] Furthermore, the included angle between each of the tooth rolling grooves and the length sides of the primary tooth plate and the auxiliary tooth plate is 60 degrees.

[0010] Compared with the prior art, the present invention provides a thread plate for producing anti-loosening screws by setting the main thread plate and the auxiliary thread plate. A plurality of rhombus-shaped concave surfaces are arranged on one side end surface of the main thread plate and the auxiliary thread plate, and the plurality of rhombus-shaped concave surfaces are connected end to end, so that a continuous rhombus-shaped surface is formed on the screw blank when rolling the threads. A plurality of rolling grooves are arranged obliquely on the plurality of rhombus-shaped concave surfaces connected end to end. The plurality of rolling grooves are arranged in parallel with each other at intervals. The thread plate can process the screw threads and the tensile structure at the same time through one process, avoiding secondary processing and having high production efficiency. The screws processed by the thread plate have a fixed size and a high yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model provides a structural schematic diagram of a thread plate for producing self-drilling tensile screws.

[0012] Figure 2 for Figure 1 A partial enlarged view of part A.

[0013] Figure 3 for Figure 1 A schematic diagram of the structure of a screw produced for producing self-drilling tensile screws. DETAILED DESCRIPTION

[0014] The following is a further detailed description of the specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0015] like Figures 1 to 3 As shown, it is a schematic diagram of the structure of a tooth plate for producing self-drilling tensile screws provided by the utility model. The tooth plate for producing self-drilling tensile screws includes a main tooth plate 10 and a secondary tooth plate 20. The main tooth plate 10 and the secondary tooth plate 20 are made of metal, such as high-strength stainless steel. It can be imagined that the tooth plate for producing self-drilling tensile screws also includes some other functional structures, such as surface coating, etc., which are well known to those skilled in the art and will not be repeated here.

[0016] The length of the primary tooth plate 10 is smaller than that of the secondary tooth plate 20, so that when the primary tooth plate 10 is rubbing teeth, the secondary tooth plate 20 can assist the primary tooth plate 10 in rubbing teeth on the surface of the screw embryo and ensure that the primary tooth plate 10 passes completely through the surface of the screw embryo.

[0017] A plurality of rhombus-shaped concave surfaces 11 are arranged on one side end surface of the primary tooth plate 10 and the secondary tooth plate 20, and the plurality of rhombus-shaped concave surfaces 11 are connected end to end so that a continuous rhombus-shaped surface is formed on the screw embryo during thread rolling. Each rhombus-shaped concave surface 11 is composed of four oppositely arranged triangular inclined surfaces.

[0018] A plurality of thread rolling grooves 12 are arranged obliquely on the multiple end-to-end connected rhombus concave surfaces 11. The multiple thread rolling grooves 12 are arranged in parallel with each other at intervals. A plane 13 is provided through the middle of each thread rolling groove 12, and the plane 13 is used to form a plane on the side of the screw thread when rolling the thread to avoid scratches, and can reduce stress concentration on the edge of the screw thread and increase the strength of the screw thread. It can be imagined that the plane 13 can be designed according to actual needs to adapt to screw blanks of different specifications, so as to be suitable for different usage scenarios.

[0019] The thread rolling groove 12 is used to extrude and form thread on the surface of the screw embryo when the main thread plate 10 and the auxiliary thread plate 20 are thread rolling.

[0020] When in use, the main tooth plate 10 and the auxiliary tooth plate 20 are fixed to both sides respectively, ensuring that the rubbing grooves 12 set on the main tooth plate 10 and the auxiliary tooth plate 20 are in a mutually staggered state when fitted. Then the screw embryo is placed between the main tooth plate 10 and the auxiliary tooth plate 20. The main tooth plate 10 and the auxiliary tooth plate 20 are moved toward each other by an external device, the screw embryo is squeezed and rotated, so as to extrude a rhombus surface and screw teeth on the surface of the screw embryo.

[0021] Compared with the prior art, the present invention provides a thread plate for producing anti-loosening screws by setting the main thread plate 10 and the auxiliary thread plate 20. A plurality of rhombus-shaped concave surfaces 11 are arranged on one side end surface of the main thread plate 10 and the auxiliary thread plate 20, and the plurality of rhombus-shaped concave surfaces 11 are connected end to end, so that a continuous rhombus-shaped surface is formed on the screw blank when rolling the threads. A plurality of rolling grooves 12 are arranged obliquely on the plurality of rhombus-shaped concave surfaces 11 connected end to end. The plurality of rolling grooves 12 are arranged in parallel with each other at intervals. This allows the thread plate to simultaneously process the screw thread and the tensile structure through one process, avoiding secondary processing and having high production efficiency. Moreover, the screws processed by the thread plate have a fixed size and a high yield rate.

[0022] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A thread plate for producing self-drilling tensile screws, characterized in that: The tooth plate used for producing self-tapping tensile screws includes a main tooth plate and a secondary tooth plate. A plurality of rhombus-shaped concave surfaces are arranged on one side end surface of the main tooth plate and the secondary tooth plate. A plurality of rolling grooves are obliquely arranged on the rhombus-shaped concave surfaces. The rolling grooves on the main tooth plate and the secondary tooth plate have the same inclination angle and inclination direction. The beginning and end of each rolling groove pass through the two end surfaces of the main tooth plate and the secondary tooth plate. The main tooth plate and the secondary tooth plate are arranged relative to each other and move toward each other.

2. The thread plate for producing self-drilling tensile screws according to claim 1, characterized in that: The length of the primary tooth plate is smaller than the length of the secondary tooth plate.

3. The thread plate for producing self-drilling tensile screws according to claim 1, characterized in that: A plurality of the rhombus-shaped concave surfaces are connected end to end.

4. The thread plate for producing self-drilling tensile screws according to claim 1, characterized in that: Each rhombus-shaped concave surface is composed of four oppositely arranged triangular inclined surfaces.

5. The thread plate for producing self-drilling tensile screws according to claim 1, characterized in that: A plane is arranged through the middle of each tooth-rolling groove.

6. The thread plate for producing self-drilling tensile screws according to claim 1, characterized in that: The included angle between each of the tooth rolling grooves and the length sides of the main tooth plate and the auxiliary tooth plate is 60 degrees.

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