Thread rolling plate for producing self-tapping chip removal screws

Abstract

A thread rolling plate for producing self-tapping chip removal screws comprises a main thread plate and an auxiliary thread plate. The main tooth plate and the auxiliary tooth plate comprise a tooth rolling unit, a chip removal unit, a locking unit, a chip removal part and a collecting part, the tooth rolling unit comprises tooth rolling teeth, the chip removal unit comprises a chip removal convex block, and the tooth rolling unit comprises a feeding part, a shaping part and a discharging part. The screw rod is embedded into the surface of a screw through the feeding part in sequence, the position of the screw is preliminarily fixed, groove expanding is carried out through the shaping part, and the end of the screw is conical through the collecting part while groove expanding is carried out, so that the screw has the self-tapping performance. The chip removal protruding block is arranged between the two thread rolling edges, the chip removal grooves are formed in the threads, the chip removal capacity of the screw is improved, the locking units are arranged on the thread rolling edges, and the stability of the screw after the screw is screwed in is improved. Screws produced by the tooth plate can be formed in sequence, the self-tapping performance is high, the good chip removal performance is achieved, and high practicability is achieved.

Description

Technical Field

[0001] This utility model relates to the field of screw mold technology, and in particular to a thread rolling plate for producing self-tapping chip-removing screws. Background Technology

[0002] A thread rolling die is a square mold used on a thread rolling machine. It consists of two pieces, one long and one short, with threads on them. It's used to extrude threads from a bolt into a threaded shape. Thread rolling dies are the most commonly used threading tool in the standard fastener industry for processing screws and bolts. Common thread rolling dies can usually only process one type of thread at a time. However, with advancements in assembly processes, the specifications of screws have also increased. This has led to the development of screws with two different thread specifications, such as screws with both standard and anti-loosening threads. The standard threads are used for self-tapping, while the anti-loosening threads prevent them from coming loose. However, current production processes generally require first rolling one type of thread onto the screw blank, and then machining the second type of thread by turning, which is difficult, inefficient, and results in a high defect rate. Utility Model Content

[0003] In view of this, the present invention provides a thread rolling dies for producing self-tapping chip-removing screws to solve the above-mentioned technical problems.

[0004] A thread rolling die for producing self-tapping chip-removing screws includes a main thread plate and a secondary thread plate. Both the main and secondary thread plates include a thread rolling unit, a chip removal unit disposed on the thread rolling unit, a locking unit disposed on both sides of the chip removal unit, a chip removal portion inclinedly disposed on one side of the length of the main and secondary thread plates, and a converging portion disposed between the chip removal portion and the thread rolling unit. The thread rolling unit includes multiple inclined threading teeth, and the chip removal unit includes a locking unit disposed on one side of each of the inclined threading teeth. The chip removal protrusions between the teeth of the tooth rolling plate, the inclination angle and inclination direction of the teeth rolling plates on the main tooth plate and the auxiliary tooth plate are the same, the tooth rolling unit set on the main tooth plate also includes a feeding part, a shaping part and a discharging part, the top area of ​​the teeth rolling plate gradually increases from the feeding part to the discharging part, the tooth rolling unit set on the auxiliary tooth plate includes a shaping part, in the main tooth plate, the feeding part and the discharging part sandwich the shaping part in the middle, the main tooth plate and the auxiliary tooth plate are arranged opposite each other and move towards each other.

[0005] Furthermore, the length of the main tooth plate is less than the length of the auxiliary tooth plate.

[0006] Furthermore, each of the aforementioned teeth extends along the length of the main tooth plate and the accessory tooth plate.

[0007] Furthermore, the cross-section of the tooth near the feed section is triangular.

[0008] Furthermore, the cross-section of the tooth near the discharge section is trapezoidal.

[0009] Furthermore, the chip removal unit is disposed on the shaping section and the discharge section.

[0010] Furthermore, the chip removal protrusion gradually increases in size along the shaping section towards the discharge section.

[0011] Furthermore, the locking unit includes two locking grooves correspondingly disposed on the toothed edge.

[0012] Compared with existing technologies, this utility model provides a thread rolling plate for producing self-tapping, chip-removing screws. The plate sequentially embeds itself into the screw surface through the feed section on the screw shaft, initially fixing the screw's position. The shaping section widens the groove, and simultaneously, the converging section tapers the screw end to give it self-tapping properties. Chip-removing protrusions are provided between the two thread rolling edges, forming chip-removing grooves on the screw threads to improve chip removal capacity. Locking units are provided on the thread rolling edges to improve the stability of the screw after it is screwed in. Screws produced by this plate can be sequentially formed, have high self-tapping performance, and excellent chip removal capabilities, making it highly practical. Attached Figure Description

[0013] Figure 1 This utility model provides a schematic diagram of the structure of a thread rolling plate for producing self-tapping chip-removing screws.

[0014] Figure 2 for Figure 1 A magnified view of part A.

[0015] Figure 3 for Figure 1 A schematic diagram of the structure of a thread rolling die used to produce self-tapping chip-removing screws. Detailed Implementation

[0016] 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.

[0017] like Figures 1 to 3 The diagram shows a structural schematic of a thread rolling plate for producing self-tapping chip-removing screws provided by this utility model. The thread rolling plate includes a main thread plate 10 and a secondary thread plate 20. It is conceivable that the thread rolling plate for producing self-tapping chip-removing screws also includes other functional structures, such as a rust-proof layer, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0018] The screw consists of a screw rod 1, screw threads 2, chip removal grooves 3, and locking blocks 4.

[0019] Both the main thread plate 10 and the auxiliary thread plate 20 are made of metal materials, such as stainless steel. The length of the main thread plate 10 is shorter than the length of the auxiliary thread plate 20, thereby ensuring the integrity of the threads on the screw surface after thread rolling. The length structure between the main thread plate 10 and the auxiliary thread plate 20 is existing technology and will not be described in detail here.

[0020] The main tooth plate 10 and the auxiliary tooth plate 20 each include a tooth-rolling unit 11, a chip removal unit 12 disposed on the tooth-rolling unit 11, a locking unit 13 disposed on both sides of the chip removal unit 12, a chip removal part 14 disposed obliquely on one side of the length of the main tooth plate 10 and the auxiliary tooth plate 20, and a converging part 15 disposed between the chip removal part 14 and the tooth-rolling unit 11.

[0021] The thread rolling unit 11 includes multiple inclined thread rolling teeth 111. The thread rolling unit 11, mounted on the main thread plate 10, also includes an inlet section 112 located at one end along its length, a shaping section 113 located in the middle region of the thread rolling unit 11, and an outlet section 114 located at the other end along its length. The shaping section 113 is located between the inlet section 112 and the outlet section 114. The thread rolling teeth 111 occupy the entire area of ​​both opposite end faces of the main thread plate 10 and the auxiliary thread plate 20, excluding the converging section 15; that is, the thread rolling teeth 111 are provided on the entire area of ​​both opposite end faces of the main thread plate 10 and the auxiliary thread plate 20, excluding the converging section 15. When the main thread plate 10 and the auxiliary thread plate 20 move relative to each other, the thread rolling teeth 111 can be used to guide the screw 1 (see...) Figure 3 The thread 2 is rolled out on the upper part. The secondary thread plate 20 is provided with a 10-degree inclination at one end near the discharge part 114 to facilitate the sliding out of the shaped screw.

[0022] Please see Figure 1Each of the toothed teeth 111 includes an extrusion surface 115 and two toothed edges 116 disposed on both sides of the extrusion surface 115. Each toothed tooth 111 extends along the length of the main tooth plate 10 and the auxiliary tooth plate 20. The two toothed edges 116 intersect at one end near the feed section 112 and have an acute included angle. As the two toothed edges 116 gradually extend towards the discharge section 114, the area of ​​the extrusion surface 115 gradually increases, that is, the cross-section of the toothed tooth 111 near the feed section 112 is triangular, and the cross-section of the toothed tooth 111 near the discharge section 114 is trapezoidal. So that when the screw 1 starts to be rolled from the feed section 112, the two intersecting rolling edges 116 can be embedded into the surface of the screw 1, and as the feed section 112, the shaping section 113, and the discharge section 114 pass through the extrusion surface 115 to expand the groove, thereby gradually forming threads 2 on the surface of the screw 1.

[0023] The chip removal unit 12 is disposed on the shaping part 113 and the discharge part 114. The chip removal unit 12 includes a plurality of chip removal protrusions 121 disposed between the two teeth 111, thereby forming a chip removal groove 3 on the thread 2.

[0024] Please see Figure 2 The locking unit 13 includes two locking grooves 131 corresponding to the thread-rolling ridge 116. Since the locking grooves 131 are located on the thread-rolling ridge 116, locking blocks 4 can be formed on both sides of the thread 2 after thread rolling, increasing the stability of the screw after it falls into the wooden board. Each pair of locking grooves 131 corresponds to one chip-removing protrusion 121, so that each chip-removing groove 3 corresponds to two locking blocks 4, improving both the chip removal performance and the screw's stability.

[0025] The chip removal section 14 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 chip removal section 14 is existing technology and will not be described in detail here. The converging section 15 is used to roll the end of the screw 1 into a tapered shape to improve the self-tapping performance of the screw. The converging section 15 is existing technology and will not be described in detail here.

[0026] Compared with existing technologies, this utility model provides a thread rolling plate for producing self-tapping, chip-removing screws. The feed section 112 is sequentially embedded into the screw surface on the screw shaft to initially fix its position. The shaping section 113 widens the groove, and simultaneously, the converging section 15 tapers the screw end to give it self-tapping properties. Multiple chip-removing protrusions 112 are provided between any two adjacent thread rolling ridges 116, forming chip-removing grooves 3 on the screw threads to improve chip removal capability. Locking units 13 are provided on the thread rolling ridges 116 to improve the stability of the screw after it is screwed in. Screws produced by this thread rolling plate can be sequentially formed, have high self-tapping performance and good chip removal performance, and are highly practical.

[0027] 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-tapping chip-removing screws, characterized in that: The thread rolling plate for producing self-tapping chip-removing screws includes a main thread plate and a secondary thread plate. Both the main and secondary thread plates include a thread rolling unit, a chip removal unit disposed on the thread rolling unit, a locking unit disposed on both sides of the chip removal unit, a chip removal section inclined on one side of the length of the main and secondary thread plates, and a converging section disposed between the chip removal section and the thread rolling unit. The thread rolling unit includes multiple inclined thread rolling teeth, and the chip removal unit includes a locking unit disposed on one side of each inclined thread rolling tooth. The tooth-removing protrusions between the teeth, the inclination angle and inclination direction of the tooth-rolling teeth on the main tooth plate and the auxiliary tooth plate are the same, the tooth-rolling unit set on the main tooth plate also includes a feeding part, a shaping part and a discharging part, the top area of ​​the tooth-rolling teeth gradually increases from the feeding part to the discharging part, the tooth-rolling unit set on the auxiliary tooth plate includes a shaping part, in the main tooth plate, the feeding part and the discharging part sandwich the shaping part in the middle, the main tooth plate and the auxiliary tooth plate are arranged opposite each other and move towards each other.

2. The thread rolling dies for producing self-tapping chip-removing 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-tapping chip-removing screws as described in claim 1, characterized in that: Each of the aforementioned teeth extends along the length of the main dental plate and the accessory dental plate.

4. The thread rolling dies for producing self-tapping chip-removing screws as described in claim 1, characterized in that: The cross-section of the tooth near the feed section is triangular.

5. The thread rolling dies for producing self-tapping chip-removing screws as described in claim 1, characterized in that: The cross-section of the tooth near the discharge section is trapezoidal.

6. The thread rolling dies for producing self-tapping chip-removing screws as described in claim 1, characterized in that: The chip removal unit is located on the shaping section and the discharge section.

7. The thread rolling dies for producing self-tapping chip-removing screws as described in claim 1, characterized in that: The chip removal protrusions gradually increase in size from the shaping section to the discharge section.

8. The thread rolling dies for producing self-tapping chip-removing screws as described in claim 1, characterized in that: Each of the toothed teeth includes a pressing surface and two toothed edges disposed on both sides of the pressing surface. The locking unit includes two locking grooves disposed corresponding to the toothed edges.

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