How To Make Extra Long Wood Drill Bits

• Posted by jeeja tools 5 November 2020 - Filed in Other - #Extra Long Wood Drill Bits  - 33 views

  In the existing drilling technology, when the processing of elongated holes is involved, such as drilling oil injection holes on train wheels, imported extended drills with a diameter of 3 mm are used.

  This drilling process currently has two problems. On the one hand, this slender and elongated drill is expensive. On the other hand, when drilling, the slender and elongated drill is locally stressed due to excessive strength. Limited, fracture accidents often occur during processing.

  In addition to the damage of the drill bit, the parts to be machined that are being punched have therefore become waste products, and the cost of the elongated hole processing process has remained high.

  The utility model relates to an elongated drill bit, which includes a drill head, a drill pipe part and a drill shank.

  The drill head includes an elongated twist drill and a first drill rod connected to each other, and the first drill rod is a rod-shaped elongated structure with a first diameter.

  Preferably, the elongated twist drill and the first drill rod are integrally formed to increase the structural stability of the drill head.

  The drill rod part includes a buffer rod and a second drill rod connected to each other, and the second drill rod is a rod-shaped elongated structure with a second diameter.

  Preferably, the buffer rod and the second drill rod are integrally formed to increase the structural stability of the drill rod part.

  The second diameter is greater than the first diameter.

  Taking the commonly used thin lengthened drill bit as an example, when the first diameter is 3mm, that is, the commonly used 3mm lengthened drill bit. Preferably, the second diameter can be 7mm to strengthen the strength of the entire drill bit and make it difficult to break.

  The specific size of this second diameter is set according to actual needs. For example, when the length to be drilled is too long and part of the buffer rod or even the second drill rod needs to be used, the second diameter can be set slightly larger than the first diameter. If the drilling length is small and the drill head is sufficient to cope, the second diameter can be set to be larger, with the primary goal of increasing the strength of the overall drill.

  The buffer rod is a truncated cone-shaped structure, the first end face away from the second drill rod adopts a first diameter, and the second end face connected with the second drill rod adopts a second diameter.

  In the process of processing fine holes, the presence of the buffer rod can ensure the smooth progress of the drilling process, and the sudden change in the size of the drill rod will not cause excessive resistance to continue drilling.

  The drill pipe portion is provided with a first elongated groove at the first end surface, the depth direction of the first elongated groove is the same as the extension direction of the shaft centerline of the drill pipe portion, and the first elongated groove is at least partially Extend into the second drill rod to ensure the stability of the connection between the drill head and the drill rod.

  Preferably, the depth of the first elongated groove is 25 mm.

  The size of the first elongated groove matches the size of the first drill rod, and the end of the first drill rod away from the elongated twist drill is embedded and fixed in the first elongated groove.

  The main purpose of this structural design is to use a low-cost short and slender drill head to connect the drill pipe with a larger diameter. While ensuring the processing length of the entire extended drill, it also increases the strength of the entire extended drill and reduces costs.

  Even after the processing times reach the threshold, the drill head is severely worn or damaged due to accidents, only the drill head needs to be replaced in a targeted manner. The short drill head is inexpensive and the cost is controlled.

  As for the connection mode of the drill rod part and the drill shank part, the following is an example to illustrate, but it should be understood that the connection mode of the drill rod part and the drill shank part is more than this one.

  The Extra Long Wood Drill Bit includes a drill head, a drill rod, and a drill shank; the drill head includes a slender twist drill and a first drill rod connected to each other; the drill rod includes a buffer rod and a second drill rod connected to each other; the buffer rod Is a truncated cone-shaped structure; the drill rod part is provided with a first elongated groove at the first end surface; the end of the first drill rod away from the elongated twist drill is embedded and fixed in the first elongated groove; The end of the two drill rods away from the buffer rod is provided with a threaded rod, the surface of the threaded rod has a first thread; the drill shank has a second elongated groove; the threaded rod of the drill rod is screwed into and fixed in the second elongated groove Inside; the axis center lines of the drill head, the drill pipe, and the second elongated groove overlap. The utility model fixes a low-cost short drill bit on a drill rod with a larger diameter, increases the strength of the entire lengthened drill bit, and improves the yield.