TWM491742U - Fast-tapping screw - Google Patents

Description

Quick tapping screw

This writing is about a quick-tapping screw, especially a spiral tooth with an asymmetrical angle extending in the chip-removing part of the drill bit, so that it has a cutting function and guide waste when drilling the surface of the workpiece. The function of chip discharge to reduce the friction between the two, and thus to achieve technical innovation with fast drilling.

According to the original patent case number: I352160 "speed tapping screw", a quick-tapping screw includes: a screw head having a screw at one end thereof, and a tip of the screw extending from a tip end of the screw The symmetrical diagonal cutting surface of the drill bit is provided at a diagonally opposite angle, wherein the longitudinal cutter surface is formed with a tapered cone cut surface at the tip taper portion, and a contraction tapered surface is formed at an opposite outer end of the longitudinal cutter surface; Most of the teeth are provided at the blade of the cone.

In the above-mentioned conventional structure, the drill bit of the symmetrical taper portion is provided with a tooth pattern and has the function of accelerating the screw drilling and attacking. However, the creator still strengthens the research and development of a new generation of quick-tapping screws to achieve a higher speed drilling and good chip removal. purpose.

In view of this, the creators of this case have carefully tested and researched, especially designed and improved the quick-tapping screws, and persisted in the spirit of perseverance. After many trials and experiments, they finally completed the creation and proposed the patent of this case. Application.

The main purpose of this creation is to provide a majority of the ridges at the edge of the drill bit in the continuation of the previous case, which allows it to reduce the friction when it comes into contact with the workpiece. It not only has a multi-point cutting function, but also reduces both. The frictional force of the contact, and thus the screw that accelerates the efficiency of the drill.

The improved technical solution of the present invention is: a quick-tapping screw, the quick-tapping screw comprises: a screw head, the screw head has a screw with an external thread extending at one end, and integrally extends at one end of the screw to form a chip guiding portion, and one end of the guiding chip portion is extended. a drill bit having a cutter face and a chip discharge portion, wherein the cutter face has a constricted conical surface with respect to the outer end surface, and a tapered conical surface is formed at the tip of the tapered portion, and the blade of the symmetric beveled section is at the blade end Each has a plurality of ribs, and the side edges of the opposite sides of the two longitudinal cutter faces are provided with a plurality of side ridges; a chip removal portion is provided between the tip end of the drill bit and the guide chip portion, and the guide portion has a spiral tooth The spiral tooth has a tooth peak, an upper oblique side, a lower oblique side and a tooth valley, wherein the inclination angle of the upper oblique side and the lower oblique side is asymmetric with the tooth peak as a parallel line, and the lower oblique side angle is larger than the upper side The angle of the bevel, and the valley of the tooth is a curved surface.

The structure of the innovative combination can improve the extended extension zone for cutting when the drill bit is in contact with the workpiece, and can reduce the characteristics of the friction force, and have the function of guiding the waste material to the surface of the workpiece, thereby achieving a rapid drilling attack. Performance.

1‧‧‧ screw head

2‧‧‧ screw

21‧‧‧ external thread

3‧‧‧Guidance

31‧‧‧Spiral teeth

311‧‧‧Upper bevel

312‧‧‧lower bevel

313‧‧‧ tooth peak

314‧‧‧ tooth valley

4‧‧‧ drill bit

41‧‧‧The chip removal department

42‧‧‧Cutter face

421‧‧‧ teeth

The first picture is the previous view of this creation.

The second figure is a partial enlarged schematic view of the guide chip portion of the present creation.

For the sake of further understanding of the purpose, features and effects of this creation, we will further clarify the drawings in accordance with the preferred embodiment of the present creation, so as to enable those who are familiar with the relevant technology of this creation to rely on this The statement of the specification is implemented according to the following: a quick-tapping screw is created, as shown in the first figure, the quick-tapping screw comprises: a screw head, the screw head 1 has a screw 2 with an external thread 21 at one end, and one end of the screw 2 The chip forming portion 3 is integrally extended to form a drill bit 4, and the drill bit 4 is provided with a symmetrical cutter surface 42 obliquely opposite to the outer end surface. The cutter surface 42 has a constricted surface opposite to the outer end surface. A plurality of teeth 421 are disposed at the blade end of the cutter face 42. A chip removing portion 41 is disposed between the tip end of the drill bit 4 and the chip guiding portion 3; the chip guiding portion 3 has a spiral tooth 31 and a tooth valley 314, the spiral The tooth 31 has a tooth peak 313, an upper oblique side 311 and a lower oblique side 312. Please refer to the tooth peak 313 as a reference line, and the inclination angle of the upper oblique side 311 and the lower oblique side 312 as shown in the second figure. Is asymmetrical, the angle of inclination of the lower oblique side 312 is greater than the inclination of the upper oblique side 311 Degree, and the valley 314 is a curved surface; wherein, in this embodiment, the most preferred lower oblique side 312 has an inclination angle of 45 degrees, and the upper oblique side 311 has an inclination angle of 15 degrees, but this is not The feature range of the present invention is limited to only one of the embodiments illustrated by the upper oblique side 311 and the lower oblique side 312.

More specifically, the upper oblique side 311 is a corner toward the drill bit, and the lower oblique side 312 is a corner toward the end of the screw 2. The angle of inclination of the upper oblique side 311 and the lower oblique side 312 is based on the tooth peak 313. The horizontal reference line and the upper oblique side 311 and the lower oblique side 312 refer to the angle of the spiral teeth 31 formed by the extension of the tooth peak 313 of the spiral tooth 31.

Wherein, the spiral teeth 31 of the guide chip portion 3 are provided with a valley 314 which is a spiral tooth valley 314 formed by the extension of the spiral tooth 31, and the tooth valley 314 is a curved surface. With its curved surface design, it can make the path of guiding waste more smooth, just like the principle of a rotary slide, when the drill bit is drilled and tapped, when the waste is generated by the row The chip portion 41 is discharged to the chip guide portion 3. Due to the special curved surface design of the tooth valley 314, the waste material is smoothly slipped out and guided to the outer surface of the workpiece, which is characterized by it.

In particular, the advantages of this creative feature are:

1. The spiral tooth 31 of the chip guiding portion 3 is a screw design with an asymmetrical angle, and the inclined angle of the lower oblique side 312 of the thread is larger than the inclined angle of the upper oblique side 311, so that when the drill bit 4 is drilled and tapped, Because the angle of the upper oblique side 311 is small, the speed of the drill tapping torque is increased and the speed of the waste discharge is slightly adjusted, so as to assist the drill bit 4 to perform the continuous drilling and attacking action, and the angle of the lower oblique side 312 is large, which has the auxiliary guide chip portion 3 smoothly. The waste is exported; this is the physics and mathematical principle of utilizing the circular rotating friction of the bevel angle of the spiral tooth 31, and the function of fastening to the workpiece is gradually drilled and tapped.

2. The screw design of the asymmetrical angle of the spiral teeth 31 of the chip guiding portion 3 is a combination design of high and low threads, which reduces the rotational torque and improves the pulling strength, and greatly reduces the risk of the combined workpiece being broken. The high and low thread of the present invention is a small angle design of the upper oblique side 311 facing the corner of the drill bit direction, and the lower oblique side 312 of the end angle of the screw 2 is designed at a large angle, so that the drilling attack speed is accelerated and the damage of the screw is reduced. rate.

3. The spiral teeth 31 of the chip guiding portion 3 are designed with asymmetrical angles, and the design of the ribs 421 of the cutting face 42 of the drill bit 4 increases the frictional force of the drill by the ribs 421 and is guided by the chip. The characteristic structure of the spiral teeth 31 of the part 3 continues to assist the drilling and attack, and the drilling speed of the present creation is doubled.

The structure of the innovative combination can improve the cutting of the drill bit when it comes into contact with the workpiece. The extension of the subsidy area, and can reduce the characteristics of the friction, as well as the appropriate function of guiding the waste to the surface of the workpiece, thereby achieving the effect of rapid drilling and attack.

In summary, it is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, the equal changes and modifications made by the patent application scope of this creation are covered by the scope of the creation patent.

1‧‧‧ screw head

2‧‧‧ screw

21‧‧‧ external thread

3‧‧‧Guidance

31‧‧‧Spiral teeth

311‧‧‧Upper bevel

312‧‧‧lower bevel

314‧‧‧ tooth valley

4‧‧‧ drill bit

41‧‧‧The chip removal department

42‧‧‧Cutter face

421‧‧‧ teeth

Claims (4)

A quick-tapping screw includes: a screw head having a screw with an external thread at one end thereof, integrally extending at a front end of the screw to form a spiral guide chip portion, and further extending forward at the chip guide portion to form a drill bit, the drill tip is provided a cutter surface and a chip removal portion, the cutter surface is provided with a tooth pattern; and the guide chip portion is formed by a spiral tooth having a tooth peak, a tooth valley, an upper oblique side and a lower oblique side, and the tooth peak is The highest point extends to both sides to form an upper oblique side and a lower oblique side, and the upper oblique side and the lower oblique side extend to a lowest point as a valley; wherein the upper oblique side and the lower oblique side are horizontal reference lines with the tooth peak as an angle The upper oblique angle is smaller than the lower oblique angle, whereby the spiral tooth is an asymmetrical angle screw, which can assist the drill to drill and attack the workpiece with continuous cutting and assist in guiding the chip removal function, thereby reducing the friction force. With the speed of attack. The quick-tapping screw of claim 1, wherein the valley is a spiral valley formed by the extension of the spiral tooth, and the valley is a curved surface. A quick-tapping screw includes: a screw head having a screw with an external thread at one end thereof, integrally extending at a front end of the screw to form a spiral guide chip portion, and further extending forward in the guide chip portion to form a drill bit, the drill bit is cut a cutting surface and a chip removing portion, wherein the cutting surface is provided with a tooth pattern; wherein the guiding portion is formed by a spiral tooth, and the upper peak and the lower oblique side are respectively formed by extending the tooth peak as a highest point, respectively The upper oblique side and the lower oblique side extend to a lowest point as a valley, the upper oblique side and the lower oblique side are horizontal reference lines at an angle of the tooth peak, the upper oblique side angle is smaller than the lower oblique side angle; and, the tooth valley is Between the spiral teeth, the tooth valley is a spiral tooth valley formed by the extension of the spiral tooth, and the tooth valley is a curved surface, thereby assisting the drill bit to have a function of continuous cutting and chip removal when drilling and working on the workpiece, and further Achieve the ability to reduce friction and speed attack. A quick-tapping screw includes: a screw head having a screw having an external thread at one end thereof, integrally extending at a front end of the screw to form a spiral guide chip portion, and further extending forward at the guide chip portion to form a drill bit, the drill tip being provided a cutting surface, the cutting surface is provided with a plurality of teeth; wherein the guiding portion is formed by a spiral tooth, and the spiral tooth forms an upper oblique side and a lower oblique side on both sides of the tooth peak extending, the upper oblique side The angle is smaller than the angle of the lower oblique side; and the valley of the guide portion is provided with a valley of teeth, which is a spiral valley formed by the extension of the spiral tooth, thereby achieving the effect of reducing the friction force and the speed attack.