TWM653006U - Drill tail screws with auxiliary cutting - Google Patents

Abstract

This new type of drill tail screw with auxiliary cutting tool includes a screw head, a rod body, a screw The tooth segment and the drill tail part; wherein, the drill tail part further extends an auxiliary section, and the auxiliary section is connected with the thread section, and the auxiliary section has a bottom rod with a rod diameter smaller than the outer diameter of the rod body. The bottom rod protrudes upward and is surrounded by auxiliary teeth on the bottom rod, and a chip discharge channel is formed between any two auxiliary teeth, and the diameter of the aforementioned auxiliary teeth is smaller than the diameter of the thread segment, and at the same time, each of the auxiliary teeth A chip discharge channel is connected with the chip discharge groove; therefore, with the assistance of the auxiliary section, the drill tail screw can reduce the drill body length of the drill tail for the thicker iron plate, so in During manufacturing, mold consumption can be reduced to reduce costs, and during the drilling and locking process, iron plate locking effects of a certain thickness can be achieved quickly.

Description

Drill tail screws with auxiliary cutting

The present invention relates to a drill tail screw, in particular to a drill tail screw with auxiliary cutting.

The length of the drill tail of a general drill screw is designed according to the thickness of the required locking iron plate. That is, when the locking object to be penetrated is thicker, the length of the drill tail needs to be longer. Conversely, when the locking object to be penetrated is thinner, the length of the drill tail needs to be shorter.

Referring to FIG. 1 , it is known that the drill screw 1 includes a screw head 11, a rod 12 extending outward from the screw head 11, a thread 13 spirally disposed on the rod 12, and a drill tail portion 14 disposed at the end of the rod 12; wherein the drill tail portion 14 includes a drill body 141 extending from the end of the rod 12, a drill tip 142 formed at the end of the drill body 141, two chip removal grooves 143 concavely disposed on the drill body 141 and extending from the drill tip 142 to the rod 12, and cutting edges 144 formed at the junction of the drill body 141 and the chip removal grooves 143.

Referring to FIG. 1 , when the self-drilling screw 1 is locked, the drill tip 142 is pressed against the surface of a locking device (not shown in the figure), and after the self-drilling screw 1 is rotated using a locking tool (not shown in the figure), the locking device is cut by the cutting edges 144 , and the chips generated by cutting the locking device are discharged by the chip removal grooves 143 , and the self-drilling screw 1 with auxiliary cutting is gradually locked into the locking device, thereby achieving the effect of locking and positioning.

However, after actual use, it was found that the drill tail 14 was directly punched by two molding dies (not shown in the figure) during manufacturing. Since the length of the drill tail 14 is completely determined by the thickness of the iron plate for drilling the lock, the thicker the iron plate for drilling the lock, the longer the length of the drill tail 14 must be. In addition to the increase in the difficulty of production and the reduction in yield, the punching force required by the molding die during the molding process must also be increased. Therefore, when the punching force is increased, the required equipment cost will increase, and at the same time, the wear rate of the mold during the punching process will also increase relatively, and the overall manufacturing cost will increase, which really needs to be improved.

Therefore, the purpose of this new model is to provide a self-drilling screw that can reduce mold loss and manufacturing costs, and can also achieve a fast drilling and locking effect.

Therefore, the new type of drill screw with auxiliary cutting includes a screw head, a rod extending outward from the screw head, a thread spirally arranged on the rod, and a drill tail portion arranged on the rod and opposite to the screw head; wherein the drill tail portion includes not only the drill body itself, and the drill tip, chip removal groove, and blade respectively arranged on the drill body, but also An auxiliary section is arranged between the drill body and the rod body, and the auxiliary section is connected to the thread section. The auxiliary section has a bottom rod with a rod diameter smaller than the outer diameter of the rod body, three auxiliary teeth protruding upward from the bottom rod and arranged around the bottom rod, and a chip removal channel is formed between any two auxiliary teeth, and each of the aforementioned chip removal channels is in conduction with the chip removal groove. The diameter of the auxiliary teeth is smaller than the diameter of the thread segment; therefore, through the design of the auxiliary segment, the drill body can cut the locking device, and the auxiliary segment can quickly discharge the chips generated by the cutting of the locking device. At the same time, the auxiliary teeth can scrape off the burrs of the locking device, effectively improving the locking effect. At the same time, through the interaction between the drill tail and the auxiliary segment, The design can adjust the length of the auxiliary section according to the thickness of the required locking device. Therefore, the design of the auxiliary section can reduce the length of the drill tail required during manufacturing, greatly reducing the wear of the manufacturing mold of the drill tail. In addition to reducing costs, the auxiliary section can also play an auxiliary role in the drilling process and achieve the locking effect of fast drilling.

[Learning]

1: Drill tail screw

11:Screw head

12: Rod

13: Screw thread

14: Drill tail

141:Drill body

142: Diamond tip

143: Chip ditch

144: Cutting Edge

[Creation]

3: Drill tail screw

31:Screw head

32: Rod

33: Thread section

34: Drill tail

341: Diamond Body

342: Diamond Tip

343: Chip removal groove

344:Blade

345: Auxiliary section

3451:Bottom rod

3452: Auxiliary teeth

3453: Chip removal channel

33D: Diameter of the thread segment

341D: Diameter of diamond body

345D: Diameter of bottom rod

3452D: Diameter of auxiliary teeth

32D: Rod body outer diameter

Figure 1 is a schematic diagram of a common screw.

Figure 2 is a schematic diagram of a preferred embodiment of this embodiment.

Figure 3 is a schematic diagram of the operation of a preferred embodiment of this embodiment.

The previously mentioned technical contents, features and functions of the present invention will be clearly understood in the following detailed description of the preferred embodiments with reference to the drawings.

Referring to FIG. 2, a preferred embodiment of the new type of drill-end screw with auxiliary cutting is shown. The drill-end screw with auxiliary cutting 3 of the present embodiment comprises a screw head 31, a rod 32 extending outward from the screw head 31, a thread segment 33 spirally disposed on the rod 32, and a drill end 34 disposed on the rod 32 and opposite to the screw head 31; wherein the drill The tail portion 34 includes a drill body 341 disposed on the rod body 32 and opposite to the end of the screw head 31, a drill tip 342 formed at the end of the drill body 341, two chip removal grooves 343 concavely disposed on the drill body 341 and extending from the drill tip 342 to the rod body 32, and blades 344 formed at the junction of the drill body 341 and the chip removal grooves 343.

As mentioned above, the drill tail 34 is further provided with an auxiliary section 345 between the drill body 341 and the rod body 32, that is, the two ends of the auxiliary section 345 are connected to the screw thread section 33 and the drill body 341 respectively, and the auxiliary section 345 has a bottom rod 3451 whose diameter 345D is smaller than the outer diameter 32D of the rod body. The rod 3451 protrudes upward and is surrounded by auxiliary teeth 3452 on the bottom rod 3451, and a chip removal channel 3453 is formed between any two auxiliary teeth 3452, wherein the diameter 3452D of the auxiliary teeth is smaller than the diameter 33D of the thread segment, and each chip removal channel 3453 is connected to the chip removal groove 343.

As mentioned above, in this embodiment, the cross section of the bottom rod 3451 is circular, and in this embodiment, the connection between the thread segment 33 and the auxiliary segment 345 can be set appropriately, and the diameter 33D of the thread segment gradually decreases toward the auxiliary segment 345, so that the chips in the chip discharge channel can be discharged more smoothly into the thread segment 33, and this embodiment is explained by taking the diameter 33D of the thread segment gradually decreasing toward the auxiliary segment 345 as an example; furthermore, in this embodiment, the protruding height of the auxiliary teeth 3452 is less than or equal to the diameter 341D of the drill body. Therefore, the bottom rod 3451 can provide a better space for accommodating chips. At the same time, the auxiliary teeth 3452 can also assist in cutting and provide partial chip accommodation. At the same time, the total length of the auxiliary section 345 plus the drill body 341 can be designed according to the thickness of the iron plate (not shown in the figure) to be locked. That is, the total length of the auxiliary section 345 plus the drill body 341 must be greater than the thickness of the iron plate, or the total length of the auxiliary section 345 can be set to be greater than the thickness of the iron plate to be locked, so the length of the drill body 341 can be reduced.

Referring to Figure 3, when the screw 2 performs locking operations, the drill tip 342 is used to collide with a locking object 4, and when the drill tail screw 3 with auxiliary cutting is turned, the blade 344 is used to cut the locking object 4, and Since the drill tail 34 is formed with a two-stage design of the drill body 341 and the auxiliary section 345, plus the diameter 345D of the bottom rod, the diameter 341D of the drill body, the diameter 3452D of the auxiliary teeth, and the thread section The design proportion of the diameter 33D has the functions of chip removal and auxiliary cutting, that is, the auxiliary teeth 3452 are ringed on the auxiliary section 345, and the two A chip discharge channel 3453 is formed between the auxiliary teeth 3452, and each chip discharge channel 3453 is in communication with the chip discharge groove 343, so that the chips generated by the cutting edge 344 cutting the object during the drilling process can pass through smoothly. The chip removal groove 343 is partially discharged to the middle of the auxiliary section 345, so the obstruction of chip removal can be reduced, thereby reducing the cutting resistance of the blade 344 and the damage and fracture caused by excessive locking torque, ensuring the sharpness of the blade 344; Moreover, through the design of the auxiliary teeth 3452, the burrs of the locking device 4 can be scraped off, effectively improving the subsequent locking effect.

Furthermore, since the drill tail 34 is designed in two sections and the chip groove 343 is formed on the drill body 341, the two molds only need to be stamped to form the length of the drill body 341. Therefore, the stamping of the chip groove 343 and the blade 344 can be easier, and the auxiliary teeth 3452 are formed by rolling separately, which reduces the damage of the stamping mold. In addition to greatly reducing the consumption and manufacturing cost, the formed drill screw 3 can also be used to lock thicker objects without being affected by the formation of the auxiliary section 345. If a thicker locking device 4 is to be locked, it only needs to increase the length of the auxiliary section 345, so the mold consumption can be reduced and the cost can be reduced.

To summarize the above, the main feature of the new type of drill screw with auxiliary cutting is that the drill tail has the design of the drill body and the auxiliary section, so that the chip groove and the blade only need to be on the drill body during the forming process, which can reduce the wear of the processing mold and reduce the processing cost. At the same time, the auxiliary teeth can scrape off the burrs of the locking device, effectively improving the locking effect. At the same time, through the design of the drill tail and the auxiliary section, the length of the auxiliary section can be adjusted according to the thickness of the required locking device, without the need to lengthen the size of the drill tail as in the conventional method, thereby reducing mold wear and achieving the effect of reducing costs.

However, the above is only to illustrate the preferred embodiment of the present invention, and it cannot be used to limit the scope of implementation of the present invention. In other words, all simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the new specification should still fall within the scope of the present patent.

3: Drill screw

31:Screw head

32: Rod body

33: Thread section

34:Drill the tail

341:Drill body

342: Diamond Tip

343: Chip ditch

344:Blade

345: Auxiliary section

3451:Bottom rod

3452:Auxiliary teeth

3453:Chip discharge channel

33D: Diameter of thread segment

341D:Diameter of drill body

345D: Diameter of the bottom rod

3452D: Diameter of auxiliary teeth

32D: Rod body outer diameter

Claims (5)

A drill tail screw with auxiliary cutting function, comprising a screw head, a rod extending outward from the screw head, a thread segment spirally arranged on the rod, and a drill tail portion arranged on the rod and opposite to the end of the screw head; wherein the drill tail portion has a drill body arranged on the rod and opposite to the end of the screw head, a drill tip formed at the end of the drill body, two chip removal grooves concavely arranged on the drill body and extending from the drill tip to the rod, and two chip removal grooves respectively formed on the drill body. The blade connected to the chip removal groove is characterized in that: the drill tail further extends to an auxiliary section, and the auxiliary section is connected to the thread section, and the auxiliary section has a bottom rod with a rod diameter smaller than the outer diameter of the rod body, three auxiliary teeth protruding upward from the bottom rod and ring-arranged on the bottom rod, and a chip removal channel is formed between any two auxiliary teeth, wherein the diameter of the auxiliary teeth is smaller than the diameter of the thread section, and each chip removal channel is connected to the chip removal groove. According to claim 1, the drill screw with auxiliary cutting function, wherein the cross section of the bottom rod is circular. The drill tail screw with auxiliary cutting according to claim 1, wherein at the junction of the thread segment and the auxiliary segment, the diameter of the thread segment gradually tapers toward the auxiliary segment. The drill tail screw with auxiliary cutting according to claim 1, wherein the protruding height of the auxiliary teeth is less than or equal to the maximum outer diameter of the drill body. The drill tail screw with auxiliary cutting according to claim 1, wherein the drill tail The drill is used to drill and cut an iron plate, and the total length of the drill tail is greater than the thickness of the iron plate.

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