Polygonal thread fast tapping screw forming die

Abstract

The utility model discloses a multi-angle thread fast tapping screw forming die which comprises a die body, the upper surface of the die body is provided with a thread forming area used for multi-angle thread forming and a pointed tail forming area used for screw tail forming, and the thread forming area and the pointed tail forming area are both provided with a plurality of mechanical teeth. Ripples are arranged on the edges of the two sides of the mechanical teeth, and the ripples on the two sides are symmetrically arranged; a wide groove is formed between every two adjacent mechanical teeth at the wave trough of the corrugation, a narrow groove is formed between every two adjacent mechanical teeth at the wave crest of the corrugation, and the wide grooves and the narrow grooves are sequentially arranged at intervals in the screw forming direction. The corrugations are arranged on the two sides of the mechanical teeth, the wide grooves are formed in the wave troughs of the corrugations of the adjacent mechanical teeth, and the narrow grooves are formed in the wave crests of the corrugations of the adjacent mechanical teeth, so that the multi-angle threads are machined, a new machining scheme is provided for the multi-angle threads, and the machining efficiency of the multi-angle threads is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screw processing dies, in particular to a polygonal thread quick-attack screw forming die. Background Art

[0002] The threads of common screws on the market are all spiral arc-shaped structures. This thread structure has relatively small resistance when screwing into loose materials, making it easy to install. However, this thread structure has a small cutting force. When screwing into hard materials, it is often difficult to screw in due to insufficient cutting force, resulting in difficulty in screw installation.

[0003] A polygonal thread, that is, a spiral polygonal structure of the thread, such as a triangular, quadrilateral, or pentagonal structure, has multiple sharp corners on the spiral line of the thread, which has a large chip cutting force and can increase the cutting force when screwing into hard materials; for this purpose, the utility model specially proposes a polygonal thread quick-attack screw forming die for batch processing of screws with polygonal threads. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model proposes a polygonal thread quick-attack screw forming die with a reasonable structural design.

[0005] The technical solution of the utility model is as follows:

[0006] A polygonal thread quick-attack screw forming mold comprises a mold body, wherein the upper surface of the mold body is provided with a thread forming area for forming polygonal threads, and a pointed tail forming area for forming the screw tail, wherein the thread forming area and the pointed tail forming area are both provided with a plurality of mechanical teeth; the two side edges of the mechanical teeth are respectively corrugated, and the corrugations on both sides are symmetrically arranged; a wide groove is formed at the trough of the corrugation between two adjacent mechanical teeth, and a narrow groove is formed at the crest of the corrugation between two adjacent mechanical teeth, and the wide groove and the narrow groove are arranged in sequence along the screw forming direction.

[0007] Furthermore, at least three of the wide grooves on the upper surface of the mold body along the screw forming direction form a group for forming polygonal threads, wherein three wide grooves form a group to form a triangular thread.

[0008] Furthermore, when the number of wide grooves in a group of the wide grooves corresponds to the circumference of the screw, a thread with a corresponding number of angles is formed; that is, the number of wide grooves within the circumference of the screw will form a thread with a number of angles. For example, if there are 5 wide grooves within the circumference of the screw, a pentagonal thread will be formed.

[0009] Furthermore, the pointed tail forming area is arranged on the upper surface of the mold body and is inclined upward, forming an angle with the upper surface of the mold body, for forming the pointed tail of the screw.

[0010] Furthermore, the mold body is provided with an introduction area, a forming area and a discharge area along its length direction; the introduction area is arranged obliquely upward, the forming area is arranged horizontally, and the discharge area is arranged obliquely downward.

[0011] Furthermore, the groove depth of the forming groove between adjacent mechanical teeth gradually decreases along the introduction area, the forming area, and the discharge area, and the tooth plane width of the mechanical teeth gradually increases along the introduction area, the forming area, and the discharge area.

[0012] The beneficial effects of the utility model are as follows:

[0013] The utility model realizes the processing of polygonal threads by arranging corrugations on both sides of the mechanical teeth, forming wide grooves at the troughs of the corrugations of adjacent mechanical teeth, and forming narrow grooves at the crests of the corrugations of adjacent mechanical teeth, thereby providing a new processing solution for polygonal threads and improving the efficiency of polygonal thread processing.

[0014] The screw processed and formed by the utility model has a multi-angle thread structure, such as a triangular, quadrangular, and pentagonal thread structure, and can effectively penetrate hard materials at a high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the top structure of the utility model;

[0016] Figure 2 This is a front view structural diagram of the utility model;

[0017] Figure 3 This is a schematic diagram of the screw structure processed and formed in the utility model;

[0018] Figure 4 This is a cross-sectional view of the screw structure processed and formed according to the present invention;

[0019] In the figure: 1. Mold body; 101. Thread forming area; 102. Tail forming area; 103. Inlet area; 104. Forming area; 105. Discharge area; 2. Mechanical teeth; 3. Corrugation; 4. Wide groove; 5. Narrow groove. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] A polygonal thread quick-attack screw forming die, such as Figure 1 , which shows the planar structural composition of the mold body. Specifically, the upper surface of the mold body 1 is provided with a thread forming area 101 for forming polygonal threads and a pointed tail forming area 102 for forming the tail of the screw.

[0022] The thread forming area 101 is provided with a plurality of mechanical teeth 2. Specifically, the cross section of the mechanical teeth 2 is a trapezoidal structure, that is, the top surface is flat and the two side surfaces are sloped. The edges of the mechanical teeth 2 are corrugated, and the corrugations 3 on both sides are symmetrically arranged.

[0023] A wide groove 4 is formed at the trough of the corrugation 3 between two adjacent mechanical teeth 2, and a narrow groove 5 is formed at the crest of the corrugation 3 between two adjacent mechanical teeth 2. The wide groove 4 and the narrow groove 5 are arranged in sequence along the screw forming direction.

[0024] In this embodiment, the upper surface of the mold body 1 has four wide grooves 4 in the screw forming direction as a group, which are used for forming four-corner threads; there are four wide grooves 4 in the corresponding screw circumference, and the screw has a four-corner thread structure after forming.

[0025] Since quick-attack screws generally have a pointed tail structure, a pointed tail forming area 102 is provided on the upper surface of the mold body 1. The pointed tail forming area 102 is provided on the upper surface of the mold body 1 obliquely upward for forming the screw pointed tail.

[0026] Note that in order to improve the quick attack effect of the pointed tail structure, the pointed tail forming area 102 is also provided with mechanical teeth 2, so that the pointed tail structure also has a polygonal thread structure after forming.

[0027] like Figure 2 As shown, the mold body 1 is provided with an introduction area 103, a forming area 104, and a discharge area 105 along its length. The introduction area 103 is tilted upward, the forming area 104 is horizontal, and the discharge area 105 is tilted downward. The introduction area 103 is longer than the forming area 104. The depth of the forming grooves between adjacent mechanical teeth 2 gradually decreases along the introduction, forming, and discharge areas, while the tooth plane width of the mechanical teeth 2 gradually increases along the introduction, forming, and discharge areas. This arrangement facilitates the introduction, forming, and discharge of polygonal threads.

[0028] like Figure 3-4 The figure shows the screw structure after being processed and formed by the mold of the utility model. The screw processed in this embodiment is a screw with a four-corner thread structure.

[0029] The above embodiments are only preferred embodiments of the present invention and are not limitations on the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A polygonal thread quick-attack screw forming die, characterized in that: The invention comprises a mold body (1), wherein the upper surface of the mold body (1) is provided with a thread forming area (101) for forming a polygonal thread, and a pointed tail forming area (102) for forming the tail of a screw, and the thread forming area (101) and the pointed tail forming area (102) are both provided with a plurality of mechanical teeth (2); the edges on both sides of the mechanical teeth (2) are respectively corrugated, and the corrugations (3) on both sides are symmetrically arranged; a wide groove (4) is formed at the trough of the corrugation (3) between two adjacent mechanical teeth (2), and a narrow groove (5) is formed at the crest of the corrugation (3) between two adjacent mechanical teeth (2), and the wide groove (4) and the narrow groove (5) are sequentially spaced along the screw forming direction.

2. A polygonal thread quick-tap screw forming die according to claim 1, characterized in that: At least three wide grooves (4) are formed in a group along the screw forming direction on the upper surface of the mold body (1) for forming polygonal threads.

3. The polygonal thread quick-tap screw forming die according to claim 1, characterized in that: When the number of wide grooves in a group of the wide grooves (4) corresponds to the circumference of the screw, a thread with a corresponding number of angles is formed.

4. The polygonal thread quick-tap screw forming die according to claim 1, characterized in that: The tip tail forming area (102) is arranged on the upper surface of the mold body (1) in an inclined upward direction, forming an angle with the upper surface of the mold body (1), and is used for forming the tip tail of the screw.

5. The polygonal thread quick-tap screw forming die according to claim 1, characterized in that: The mold body (1) is provided with an introduction area (103), a forming area (104) and a discharge area (105) along its length direction; the introduction area (103) is arranged obliquely upward, the forming area (104) is arranged horizontally, and the discharge area (105) is arranged obliquely downward.

6. The polygonal thread quick-tap screw forming die according to claim 5, characterized in that: The groove depth of the forming grooves between adjacent mechanical teeth (2) gradually decreases along the introduction area, the forming area, and the discharge area, and the tooth plane width of the mechanical teeth (2) gradually increases along the introduction area, the forming area, and the discharge area.

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