Tooth plate die for producing rhombic screws

Abstract

A tooth plate mold for producing rhombic screws comprises two mold bodies, each mold body comprises a base plate and a thread rolling part arranged on one side of the base plate, each thread rolling part comprises a plurality of rhombic forming grooves, the rhombic vertexes of the adjacent forming grooves coincide with each other, and the rhombic vertexes of the forming grooves coincide with each other. And the widths of the groove openings of the forming grooves are sequentially reduced in the moving direction of the thread rolling part during thread rolling. According to the dental plate mold for producing the rhombic threads, the forming grooves are formed, so that corresponding convex patterns are formed on the surfaces of machined screws, the vertexes of the adjacent forming grooves coincide with one another to form a net shape, and therefore the patterns on the surfaces of the machined screws are tightly connected and regularly distributed; when in use, the rhombic screw is inserted between two plates, gaps between the rhombic screw and the plates are filled and glued through injection molding treatment, the rhombic screw can not be easily inserted and pulled and cannot rotate during installation, and the stability during installation is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of tooth plate molds, in particular to a tooth plate mold for producing diamond screws. Background Art

[0002] The thread rolling plate is a special tool used for processing taps and bolts. The processing is mainly done by cold extrusion. Due to the advantages of high production efficiency, low processing cost, high precision and strength of the processed threads, cold extrusion has been widely used in the processing of screws and bolts. When the screw is used to connect two objects, a thread is generally opened on the surface of the screw, and the screw is inserted into the two objects in turn by rotation to achieve connection.

[0003] However, the use of threaded connections requires great precision in the threads. At the same time, the bolts are prone to vibration during use and have the risk of falling off, thus affecting the stability of the connection. Utility Model Content

[0004] In view of this, the utility model provides a thread plate mold for producing diamond screws to solve the above problems.

[0005] A thread plate mold for producing diamond screws, comprising two mold bodies. Each of the mold bodies comprises a substrate and a thread rolling section arranged on one side of the substrate. The thread rolling section comprises a plurality of diamond-shaped forming grooves. The sizes of each of the forming grooves are respectively the same, and a vertex of the diamond shape of adjacent forming grooves overlaps with each other, so that the forming grooves are arranged to form a mesh. The cross-section of the forming groove is V-shaped. The notch width of the forming groove decreases successively in the moving direction of the thread rolling section during thread rolling.

[0006] Furthermore, the angles between the groove walls on both sides of the forming groove and the horizontal plane are the same.

[0007] Furthermore, a horizontal plane is provided at the bottom of the forming groove, and the horizontal plane is parallel to the plane where the notch of the forming groove is located.

[0008] Furthermore, an end surface of the thread rolling portion is higher than an end surface of the substrate, and a thickness of the thread rolling portion is greater than a depth of the forming groove.

[0009] Furthermore, adjacent forming grooves are connected to each other.

[0010] Furthermore, the shape of the forming groove is square.

[0011] Furthermore, the width of the thread rolling portion is twice the diagonal of the square of the forming groove.

[0012] Compared with the prior art, the tooth plate mold for producing diamond threads provided by the utility model forms the corresponding convex pattern on the surface of the screw after processing by setting the forming grooves, and the vertices of adjacent forming grooves overlap with each other to form a mesh, so that the patterns on the surface of the screw after processing are closely connected and regularly distributed. This diamond screw is inserted between two plates when in use, and the gap between the diamond screw and the plate is filled and glued by injection molding. The diamond screw is not easy to insert or pull out during installation and will not rotate, thereby ensuring stability during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic structural diagram of a thread plate mold for producing diamond screws.

[0014] Figure 2 for Figure 1 Schematic diagram of the structure of the screw formed by the tooth plate mold for producing diamond screws.

[0015] Figure 3 for Figure 1 A partial enlarged view of the tooth plate mold used to produce diamond screws at point A.

[0016] Figure 4 for Figure 1 Schematic diagram of the structure of the screw at the production site of the tooth plate mold for producing diamond screws. DETAILED DESCRIPTION

[0017] 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.

[0018] like Figures 1 to 4 As shown, it is a schematic diagram of the structure of the die plate mold for producing diamond screws provided by the utility model. The die plate mold for producing diamond screws includes two mold bodies 10. The die plate mold for producing diamond screws also includes some other functional modules, such as a clamping part arranged on one side of the mold body 10 and used to clamp the mold body 10, etc., which should be a technology well known to those skilled in the art and will not be described in detail one by one here.

[0019] The mold body 10 includes a base plate 11 and a thread rolling portion 12 disposed on one side of the base plate 11 .

[0020] The end face of the thread rolling portion 12 is higher than the end face of the base plate 11. Since there is a height difference between the thread rolling portion 12 and the end face of the base plate 11, when processing a screw, when the screw is located at the edge of the thread rolling portion 12, part of the pattern formed on the surface of the screw will be located in the space between the end face of the thread rolling portion 12 and the end face of the base 11, and will not directly abut against the end face of the base plate 11, thereby preventing the pattern from being worn away by the base 11. The height of the thread rolling portion 12 is also greater than the depth of the molding groove 121 described below.

[0021] The thread rolling portion 12 includes a plurality of forming grooves 121 formed on the end surface of the thread rolling portion 12. The forming grooves 121 are used to form convex patterns having the same shape as the forming grooves 121 on the surface of the screw during processing.

[0022] The outer contour of each of the molding grooves 121 is a rhombus. In this embodiment, the shape formed by the molding grooves 121 is a square. The groove body cross section of the molding groove 121 is V-shaped. The V-shaped cross section facilitates the deformation of the screw surface to a corresponding shape during processing, and makes the convex portion finally formed on the screw surface have a larger surface area, so that the contact surface between the filler and the convex portion after subsequent injection molding is large, and the bonding effect is better.

[0023] The slot width of the forming groove 121 decreases successively in the moving direction of the thread rolling portion 12 during thread rolling, so that when the mold body 10 clamps the screw and moves, the screw is first roughly formed along the wider forming groove 121, and is gradually extruded into a smaller diamond-shaped protrusion during the processing. This layer-by-layer processing method can facilitate the forming of the diamond-shaped protrusion and avoid local breakage or loss of the diamond-shaped protrusion due to excessive deformation.

[0024] The bottom of the molding groove 121 is provided with a horizontal surface 122. The horizontal surface 122 can prevent the end of the protrusion formed on the screw from being too thin. When the end of the protrusion is too thin, its structural strength is insufficient and it is easy to be broken by external impact during storage, thereby reducing the contact area with the filler.

[0025] One vertex of the rhombus of adjacent forming grooves 121 overlaps with each other, so that the adjacent forming grooves 121 are arranged regularly to form a network, thereby forming dense and regularly distributed protruding lines on the surface of the screw.

[0026] The plurality of forming grooves 121 are interconnected and present a grid shape, which not only facilitates milling of the patterns of the forming grooves 121 on the thread rolling portion 12 , but also facilitates the discharge of debris along the interconnected forming grooves 121 during the screw processing process.

[0027] The angles between the groove walls on both sides of the forming groove 121 and the horizontal plane are the same, so that after the screw is formed, the inclinations of the upper and lower sides of the protrusion on the surface are the same and symmetrical, making the structure uniform and stable.

[0028] The width of the rolling section 12 is twice the diagonal of the square outline of the forming groove 121. Since the diagonal of the square outline of the forming groove 121 is respectively the same as the width direction and the length direction of the rolling section 12, when the width of the rolling section 12 is twice the diagonal, it is ensured that a complete pattern with the same shape as the forming groove 121 can be formed at each part of the rolling section 12 after processing, and the patterns at the upper and lower ends of the pattern can be aligned with the pattern formed by the previous processing and the pattern formed by the next processing and spliced ​​to form a complete pattern. The width of the rolling section 12 can also be a positive integer multiple greater than 2 times the diagonal of the square outline of the forming groove 121, such as 3 times, 4 times, etc., which can also achieve complete splicing of the patterns formed by the previous and next processing.

[0029] When in use, the two mold bodies 10 are spaced apart, and the side with the rolling part 12 is arranged opposite to each other. Preferably, one of the mold bodies 10 is a stationary static plate, and the other is a dynamic plate controlled by a horizontal drive device, and the long side length of the static plate is greater than the long side length of the dynamic plate, so that the rolling is more complete. When rolling, the screw to be processed is placed between the two mold bodies 10, and the two mold bodies 10 are controlled to move relative to each other by a horizontal drive device. When the two mold bodies 10 overlap, the screw is driven to rotate between the two mold bodies 10. According to the principle of cold extrusion molding, a pattern is processed on the surface of the screw. By changing the position of the screw between the rolling part 12, the pattern can be processed at different positions of the screw in turn, thereby forming a screw with a diamond pattern on the surface. It can be understood that the size of the mold body 10 changes, and the type of screw is selected according to the actual required screw thickness.

[0030] It should be noted that when this type of screw is used, it is also directly inserted between the two plates to be fixed. However, after insertion, it is necessary to perform injection molding between the gap between the plate and the screw so that the gap between the plate and the screw is filled and glued. After installation, the diamond screw cannot be easily pulled out and will not rotate between the plates, thereby achieving a good connection effect.

[0031] Compared with the prior art, the tooth plate mold for producing diamond threads provided by the utility model forms the corresponding convex pattern on the surface of the screw after processing by setting the forming groove 121, and the vertices of adjacent forming grooves 121 overlap with each other to form a mesh, so that the patterns on the surface of the screw after processing are closely connected and regularly distributed. When in use, this diamond screw is inserted between two plates, and the gap between the diamond screw and the plate is filled and glued by injection molding. The diamond screw is not easy to insert or pull out during installation and will not rotate, thereby ensuring stability during installation.

[0032] 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 die plate mold for producing diamond screws, characterized in that: The thread plate mold for producing diamond screws includes two mold bodies, each of which includes a base plate and a thread rolling part arranged on one side of the base plate, the thread rolling part includes a plurality of diamond-shaped forming grooves, and one vertex of the diamonds of adjacent forming grooves overlaps with each other so that the forming grooves are arranged to form a network, the cross-section of the forming groove is V-shaped, and the groove width of the forming groove decreases successively in the moving direction of the thread rolling part during thread rolling.

2. The die plate mold for producing diamond screws according to claim 1, characterized in that: The angles between the groove walls on both sides of the forming groove and the horizontal plane are the same.

3. The die plate mold for producing diamond screws according to claim 1, characterized in that: The groove bottom of the forming groove is provided with a horizontal plane, and the horizontal plane is parallel to the plane where the groove opening of the forming groove is located.

4. The die plate mold for producing diamond screws according to claim 1, characterized in that: The end surface of the thread rolling portion is higher than the end surface of the substrate, and the thickness of the thread rolling portion is greater than the depth of the forming groove.

5. The die plate mold for producing diamond screws according to claim 1, characterized in that: Adjacent forming grooves are communicated with each other.

6. The die plate mold for producing diamond screws according to claim 1, characterized in that: The shape of the forming groove is square.

7. The die plate mold for producing diamond screws according to claim 1, characterized in that: The width of the thread rolling portion is twice the diagonal of the square of the forming groove.

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